From 6c2b3aa1b95ee933dd81e9cb4cf8015e4f16a625 Mon Sep 17 00:00:00 2001
From: Rob Lemley <rob@thunderbird.net>
Date: Tue, 14 Apr 2020 22:30:29 +0000
Subject: [PATCH] Bug 1621782 - Import json-c sources into comm-central. r=kaie

JSON-C is a dependency of RNP.

Differential Revision: https://phabricator.services.mozilla.com/D70736

--HG--
extra : moz-landing-system : lando
---
 third_party/README.json-c                     |   41 +
 third_party/json-c/AUTHORS                    |    5 +
 third_party/json-c/COPYING                    |   42 +
 third_party/json-c/ChangeLog                  |  382 +++++
 third_party/json-c/INSTALL                    |    3 +
 third_party/json-c/NEWS                       |    1 +
 third_party/json-c/README.html                |   42 +
 third_party/json-c/README.md                  |  173 ++
 third_party/json-c/RELEASE_CHECKLIST.txt      |  136 ++
 third_party/json-c/STYLE.txt                  |   31 +
 third_party/json-c/arraylist.c                |  146 ++
 third_party/json-c/arraylist.h                |   70 +
 third_party/json-c/bits.h                     |   36 +
 third_party/json-c/config.h.in                |  196 +++
 third_party/json-c/config.h.win32             |  205 +++
 third_party/json-c/debug.c                    |   83 +
 third_party/json-c/debug.h                    |   75 +
 third_party/json-c/issues_closed_for_0.13.md  |  267 +++
 third_party/json-c/json.h                     |   38 +
 third_party/json-c/json_c_version.c           |   20 +
 third_party/json-c/json_c_version.h           |   40 +
 third_party/json-c/json_config.h.in           |    3 +
 third_party/json-c/json_config.h.win32        |    5 +
 third_party/json-c/json_inttypes.h            |   23 +
 third_party/json-c/json_object.c              | 1493 +++++++++++++++++
 third_party/json-c/json_object.h              | 1034 ++++++++++++
 third_party/json-c/json_object_iterator.c     |  163 ++
 third_party/json-c/json_object_iterator.h     |  240 +++
 third_party/json-c/json_object_private.h      |   64 +
 third_party/json-c/json_pointer.c             |  327 ++++
 third_party/json-c/json_pointer.h             |  120 ++
 third_party/json-c/json_tokener.c             |  997 +++++++++++
 third_party/json-c/json_tokener.h             |  216 +++
 third_party/json-c/json_util.c                |  243 +++
 third_party/json-c/json_util.h                |  106 ++
 third_party/json-c/json_visit.c               |  133 ++
 third_party/json-c/json_visit.h               |   95 ++
 third_party/json-c/libjson.c                  |   26 +
 third_party/json-c/linkhash.c                 |  690 ++++++++
 third_party/json-c/linkhash.h                 |  406 +++++
 third_party/json-c/math_compat.h              |   36 +
 third_party/json-c/printbuf.c                 |  155 ++
 third_party/json-c/printbuf.h                 |  122 ++
 third_party/json-c/random_seed.c              |  238 +++
 third_party/json-c/random_seed.h              |   29 +
 third_party/json-c/snprintf_compat.h          |   41 +
 third_party/json-c/strdup_compat.h            |   16 +
 third_party/json-c/strerror_override.c        |  101 ++
 third_party/json-c/strerror_override.h        |   30 +
 .../json-c/strerror_override_private.h        |   12 +
 third_party/json-c/vasprintf_compat.h         |   46 +
 51 files changed, 9242 insertions(+)
 create mode 100644 third_party/README.json-c
 create mode 100644 third_party/json-c/AUTHORS
 create mode 100644 third_party/json-c/COPYING
 create mode 100644 third_party/json-c/ChangeLog
 create mode 100644 third_party/json-c/INSTALL
 create mode 100644 third_party/json-c/NEWS
 create mode 100644 third_party/json-c/README.html
 create mode 100644 third_party/json-c/README.md
 create mode 100644 third_party/json-c/RELEASE_CHECKLIST.txt
 create mode 100755 third_party/json-c/STYLE.txt
 create mode 100644 third_party/json-c/arraylist.c
 create mode 100644 third_party/json-c/arraylist.h
 create mode 100644 third_party/json-c/bits.h
 create mode 100644 third_party/json-c/config.h.in
 create mode 100644 third_party/json-c/config.h.win32
 create mode 100644 third_party/json-c/debug.c
 create mode 100644 third_party/json-c/debug.h
 create mode 100644 third_party/json-c/issues_closed_for_0.13.md
 create mode 100644 third_party/json-c/json.h
 create mode 100644 third_party/json-c/json_c_version.c
 create mode 100644 third_party/json-c/json_c_version.h
 create mode 100644 third_party/json-c/json_config.h.in
 create mode 100644 third_party/json-c/json_config.h.win32
 create mode 100644 third_party/json-c/json_inttypes.h
 create mode 100644 third_party/json-c/json_object.c
 create mode 100644 third_party/json-c/json_object.h
 create mode 100644 third_party/json-c/json_object_iterator.c
 create mode 100644 third_party/json-c/json_object_iterator.h
 create mode 100644 third_party/json-c/json_object_private.h
 create mode 100644 third_party/json-c/json_pointer.c
 create mode 100644 third_party/json-c/json_pointer.h
 create mode 100644 third_party/json-c/json_tokener.c
 create mode 100644 third_party/json-c/json_tokener.h
 create mode 100644 third_party/json-c/json_util.c
 create mode 100644 third_party/json-c/json_util.h
 create mode 100644 third_party/json-c/json_visit.c
 create mode 100644 third_party/json-c/json_visit.h
 create mode 100644 third_party/json-c/libjson.c
 create mode 100644 third_party/json-c/linkhash.c
 create mode 100644 third_party/json-c/linkhash.h
 create mode 100644 third_party/json-c/math_compat.h
 create mode 100644 third_party/json-c/printbuf.c
 create mode 100644 third_party/json-c/printbuf.h
 create mode 100644 third_party/json-c/random_seed.c
 create mode 100644 third_party/json-c/random_seed.h
 create mode 100644 third_party/json-c/snprintf_compat.h
 create mode 100644 third_party/json-c/strdup_compat.h
 create mode 100644 third_party/json-c/strerror_override.c
 create mode 100644 third_party/json-c/strerror_override.h
 create mode 100644 third_party/json-c/strerror_override_private.h
 create mode 100644 third_party/json-c/vasprintf_compat.h

diff --git a/third_party/README.json-c b/third_party/README.json-c
new file mode 100644
index 0000000000..216e8a1e04
--- /dev/null
+++ b/third_party/README.json-c
@@ -0,0 +1,41 @@
+Directory ./json-c contains a copy of version 0.13.1 of the json-c library,
+which has been obtained from  https://s3.amazonaws.com/json-c_releases/releases/json-c-0.13.1-nodoc.tar.gz .
+(Link at https://github.com/json-c/json-c/wiki).
+
+For licensing information, please refer to the included documentation.
+
+The SHA256SUM of the imported file is:
+94a26340c0785fcff4f46ff38609cf84ebcd670df0c8efd75d039cc951d80132  json-c-0.13.1-nodoc.tar.gz
+
+The following files and directories were removed from the source distribution's root:
+autoconf-archive/
+fuzz/
+tests/
+.editorconfig
+.gitignore
+.travis.yml
+Android.configure.mk
+CMakeLists.txt
+Doxyfile
+Makefile.am
+Makefile.in
+README
+aclocal.m4
+appveyor.yml
+autogen.sh
+compile
+config.guess
+config.sub
+configure
+configure.ac
+depcomp
+install-sh
+json-c-uninstalled.pc.in
+json-c.pc.in
+ltmain.sh
+missing
+test-driver
+
+The following files were added to the source's root by MZLA Technologies:
+moz.build
+
diff --git a/third_party/json-c/AUTHORS b/third_party/json-c/AUTHORS
new file mode 100644
index 0000000000..b389989c45
--- /dev/null
+++ b/third_party/json-c/AUTHORS
@@ -0,0 +1,5 @@
+Michael Clark <michael@metaparadigm.com>
+Jehiah Czebotar <jehiah@gmail.com>
+Eric Haszlakiewicz <hawicz+json-c@gmail.com>
+C. Watford (christopher.watford@gmail.com)
+
diff --git a/third_party/json-c/COPYING b/third_party/json-c/COPYING
new file mode 100644
index 0000000000..740d1258d4
--- /dev/null
+++ b/third_party/json-c/COPYING
@@ -0,0 +1,42 @@
+
+Copyright (c) 2009-2012 Eric Haszlakiewicz
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+----------------------------------------------------------------
+
+Copyright (c) 2004, 2005 Metaparadigm Pte Ltd
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/third_party/json-c/ChangeLog b/third_party/json-c/ChangeLog
new file mode 100644
index 0000000000..8681225689
--- /dev/null
+++ b/third_party/json-c/ChangeLog
@@ -0,0 +1,382 @@
+
+0.13.1 (up to commit 0f814e5, 2018/03/04)
+=========================================
+
+* Bump the major version of the .so library generated up to 4.0 to avoid 
+  conflicts because some downstream packagers of json-c had already done
+  their own bump to ".so.3" for a much older 0.12 release.
+* Add const size_t json_c_object_sizeof()
+* Avoid invalid free (and thus a segfault) when ref_count gets < 0
+* PR#394: fix handling of custom double formats that include a ".0"
+* Avoid uninitialized variable warnings in json_object_object_foreach
+* Issue #396: fix build for certain uClibc based systems.
+* Add a top level fuzz directory for fuzzers run by OSS-Fuzz
+
+0.13 (up to commit 5dae561, 2017/11/29)
+=================================
+
+This release, being three and a half years after the 0.12 branch (f84d9c),
+   has quite a number of changes included.  The following is a sampling of
+   the most significant ones.
+
+Since the 0.12 release, 250 issues and pull requests have been closed.
+See issues_closed_for_0.13.md for a complete list.
+
+
+Deprecated and removed features:
+--------------------------------
+* All internal use of bits.h has been eliminated.  The file will be removed.
+	Do not use: hexdigit(), error_ptr(), error_descrition() and it_error() 
+* lh_abort() is deprecated.  It will be removed.
+
+Behavior changes:
+-----------------
+* Tighten the number parsing algorithm to raise errors instead of truncating
+     the results.  For example 12.3.4 or 2015-01-15, which now return null.
+	 See commit 99d8fc
+
+* Use size_t for array length and size.  Platforms where sizeof(size_t) != sizeof(int) may not be backwards compatible
+	See commits 45c56b, 92e9a5 and others.
+
+* Check for failue when allocating memory, returning NULL and errno=ENOMEM.
+	 See commit 2149a04.
+
+* Change json_object_object_add() return type from void to int, and will return -1 on failures, instead of exiting. (Note: this is not an ABI change)
+
+New features:
+-------------
+* We're aiming to follow RFC 7159 now.
+
+* Add a couple of additional option to json_object_to_json_string_ext:
+	JSON_C_TO_STRING_PRETTY_TAB
+	JSON_C_TO_STRING_NOSLASHESCAPE
+
+* Add a json_object_object_add_ex() function to allow for performance
+	improvements when certain constraints are known to be true.
+
+* Make serialization format of doubles configurable, in two different ways:
+	Call json_object_set_serializer with json_object_double_to_json_string and a custom
+	 format on each double object, or
+	Call json_c_set_serialization_double_format() to set a global or thread-wide format.
+
+* Add utility function for comparing json_objects - json_object_equal()
+
+* Add a way to copy entire object trees: json_object_deep_copy()
+* Add json_object_set_<type> function to modify the value of existing json_object's
+ without the need to recreate them.  Also add a json_object_int_inc function to
+ adjust an int's value.
+* Add support for JSON pointer, RFC 6901.  See json_pointer.h
+* Add a json_util_get_last_err() function to retrieve the string describing the
+ cause of errors, instead of printing to stderr.
+* Add perllike hash function for strings, and json_global_set_string_hash() 8f8d03d
+* Add a json_c_visit() function to provide a way to iterate over a tree of json-c objects.
+
+Notable bug fixes and other improvements:
+-----------------------------------------
+* Make reference increment and decrement atomic to allow passing json objects between threads.
+* Fix json_object_object_foreach to avoid uninitialized variable warnings.
+* Improve performance by removing unneeded data items from hashtable code and reducing duplicate hash computation.
+* Improve performance by storing small strings inside json_object
+* Improve performance of json_object_to_json_string by removing variadic printf. commit 9ff0f49
+* Issue #371: fix parsing of "-Infinity", and avoid needlessly copying the input when doing so.
+* Fix stack buffer overflow in json_object_double_to_json_string_format() - commit 2c2deb87
+* Fix various potential null ptr deref and int32 overflows
+* Issue #332: fix a long-standing bug in array_list_put_idx() where it would attempt to free previously free'd entries due to not checking the current array length.
+* Issue #195: use uselocale() instead of setlocale() in json_tokener to behave better in threaded environments.
+* Issue #275: fix out of bounds read when handling unicode surrogate pairs.
+* Ensure doubles that happen to be a whole number are emitted with ".0" - commit ca7a19
+* PR#331: for Visual Studio, use a snprintf/vsnprintf wrapper that ensures the string is terminated.
+* Fix double to int cast overflow in json_object_get_int64.
+* Clamp double to int32 when narrowing in json_object_get_int.
+* Use strtoll() to parse ints - instead of sscanf
+* Miscellaneous smaller changes, including removing unused variables, fixing warning
+ about uninitialized variables adding const qualifiers, reformatting code, etc...
+
+Build changes:
+--------------
+* Add Appveyor and Travis build support
+* Switch to using CMake when building on Windows with Visual Studio.
+	A dynamic .dll is generated instead of a .lib
+	config.h is now generated, config.h.win32 should no longer be manually copied
+* Add support for MacOS through CMake too.
+* Enable silent build by default
+* Link against libm when needed
+* Add support for building with AddressSanitizer
+* Add support for building with Clang
+* Add a --enable-threading configure option, and only use the (slower) __sync_add_and_fetch()/__sync_sub_and_fetch() function when it is specified.
+
+List of new functions added:
+----------------------------
+### json_object.h
+* array_list_bsearch()
+* array_list_del_idx()
+* json_object_to_json_string_length()
+* json_object_get_userdata()
+* json_object_set_userdata()
+* json_object_object_add_ex()
+* json_object_array_bsearch()
+* json_object_array_del_idx()
+* json_object_set_boolean()
+* json_object_set_int()
+* json_object_int_inc()
+* json_object_set_int64()
+* json_c_set_serialization_double_format()
+* json_object_double_to_json_string()
+* json_object_set_double()
+* json_object_set_string()
+* json_object_set_string_len()
+* json_object_equal()
+* json_object_deep_copy()
+
+### json_pointer.h
+* json_pointer_get()
+* json_pointer_getf()
+* json_pointer_set()
+* json_pointer_setf()
+
+### json_util.h
+* json_object_from_fd()
+* json_object_to_fd()
+* json_util_get_last_err()
+
+### json_visit.h
+* json_c_visit()
+
+### linkhash.h
+* json_global_set_string_hash()
+* lh_table_resize()
+
+### printbuf.h
+* printbuf_strappend()
+
+
+0.12.1
+======
+
+  * Minimal changes to address compile issues.
+
+0.12
+====
+
+  * Address security issues:
+    * CVE-2013-6371: hash collision denial of service
+    * CVE-2013-6370: buffer overflow if size_t is larger than int
+
+  * Avoid potential overflow in json_object_get_double
+
+  * Eliminate the mc_abort() function and MC_ABORT macro.
+
+  * Make the json_tokener_errors array local.  It has been deprecated for
+     a while, and json_tokener_error_desc() should be used instead.
+
+  * change the floating point output format to %.17g so values with 
+     more than 6 digits show up in the output.
+
+  * Remove the old libjson.so name compatibility support.  The library is
+      only created as libjson-c.so now and headers are only installed 
+      into the ${prefix}/json-c directory.
+
+  * When supported by the linker, add the -Bsymbolic-functions flag.
+
+  * Various changes to fix the build on MSVC.
+
+  * Make strict mode more strict:
+    * number must not start with 0
+    * no single-quote strings
+    * no comments
+    * trailing char not allowed
+    * only allow lowercase literals
+
+  * Added a json_object_new_double_s() convenience function to allow
+    an exact string representation of a double to be specified when
+    creating the object and use it in json_tokener_parse_ex() so
+    a re-serialized object more exactly matches the input.
+
+  * Add support NaN and Infinity
+
+
+0.11
+====
+
+  * IMPORTANT: the name of the library has changed to libjson-c.so and
+     the header files are now in include/json-c.
+     The pkgconfig name has also changed from json to json-c.
+     You should change your build to use appropriate -I and -l options.
+     A compatibility shim is in place so builds using the old name will
+     continue to work, but that will be removed in the next release.
+  * Maximum recursion depth is now a runtime option.
+     json_tokener_new() is provided for compatibility.
+     json_tokener_new_ex(depth)
+  * Include json_object_iterator.h in the installed headers.
+  * Add support for building on Android.
+  * Rewrite json_object_object_add to replace just the value if the key already exists so keys remain valid.
+  * Make it safe to delete keys while iterating with the json_object_object_foreach macro.
+  * Add a json_set_serializer() function to allow the string output of a json_object to be customized.
+  * Make float parsing locale independent.
+  * Add a json_tokener_set_flags() function and a JSON_TOKENER_STRICT flag.
+  * Enable -Werror when building.
+  * speed improvements to parsing 64-bit integers on systems with working sscanf
+  * Add a json_object_object_length function.
+  * Fix a bug (buffer overrun) when expanding arrays to more than 64 entries.
+
+0.10
+====
+
+  * Add a json_object_to_json_string_ext() function to allow output to be
+     formatted in a more human readable form.
+  * Add json_object_object_get_ex(), a NULL-safe get object method, to be able
+     to distinguish between a key not present and the value being NULL.
+  * Add an alternative iterator implementation, see json_object_iterator.h
+  * Make json_object_iter public to enable external use of the
+     json_object_object_foreachC macro.
+  * Add a printbuf_memset() function to provide an effecient way to set and
+     append things like whitespace indentation.
+  * Adjust json_object_is_type and json_object_get_type so they return
+      json_type_null for NULL objects and handle NULL passed to
+      json_objct_object_get().
+  * Rename boolean type to json_bool.
+  * Fix various compile issues for Visual Studio and MinGW.
+  * Allow json_tokener_parse_ex() to be re-used to parse multiple object.
+     Also, fix some parsing issues with capitalized hexadecimal numbers and
+     number in E notation.
+  * Add json_tokener_get_error() and json_tokener_error_desc() to better 
+     encapsulate the process of retrieving errors while parsing.
+  * Various improvements to the documentation of many functions.
+  * Add new json_object_array_sort() function.
+  * Fix a bug in json_object_get_int(), which would incorrectly return 0
+    when called on a string type object.
+    Eric Haszlakiewicz
+  * Add a json_type_to_name() function.
+    Eric Haszlakiewicz
+  * Add a json_tokener_parse_verbose() function.
+    Jehiah Czebotar
+  * Improve support for null bytes within JSON strings.
+    Jehiah Czebotar
+  * Fix file descriptor leak if memory allocation fails in json_util
+    Zachary Blair, zack_blair at hotmail dot com
+  * Add int64 support. Two new functions json_object_net_int64 and
+    json_object_get_int64. Binary compatibility preserved.
+    Eric Haszlakiewicz, EHASZLA at transunion com
+    Rui Miguel Silva Seabra, rms at 1407 dot org
+  * Fix subtle bug in linkhash where lookup could hang after all slots
+    were filled then successively freed.
+    Spotted by Jean-Marc Naud, j dash m at newtraxtech dot com
+  * Make json_object_from_file take const char *filename
+    Spotted by Vikram Raj V, vsagar at attinteractive dot com
+  * Add handling of surrogate pairs (json_tokener.c, test4.c, Makefile.am)
+    Brent Miller, bdmiller at yahoo dash inc dot com
+  * Correction to comment describing printbuf_memappend in printbuf.h
+    Brent Miller, bdmiller at yahoo dash inc dot com
+
+0.9
+===
+  * Add README.html README-WIN32.html config.h.win32 to Makefile.am
+    Michael Clark, <michael@metaparadigm.com>
+  * Add const qualifier to the json_tokener_parse functions
+    Eric Haszlakiewicz, EHASZLA at transunion dot com
+  * Rename min and max so we can never clash with C or C++ std library
+    Ian Atha, thatha at yahoo dash inc dot com
+  * Fix any noticeable spelling or grammar errors.
+  * Make sure every va_start has a va_end.
+  * Check all pointers for validity.
+    Erik Hovland, erik at hovland dot org
+  * Fix json_object_get_boolean to return false for empty string
+    Spotted by Vitaly Kruglikov, Vitaly dot Kruglikov at palm dot com
+  * optimizations to json_tokener_parse_ex(), printbuf_memappend()
+    Brent Miller, bdmiller at yahoo dash inc dot com
+  * Disable REFCOUNT_DEBUG by default in json_object.c
+  * Don't use this as a variable, so we can compile with a C++ compiler
+  * Add casts from void* to type of assignment when using malloc 
+  * Add #ifdef __cplusplus guards to all of the headers
+  * Add typedefs for json_object, json_tokener, array_list, printbuf, lh_table
+    Michael Clark, <michael@metaparadigm.com>
+  * Null pointer dereference fix. Fix json_object_get_boolean strlen test
+    to not return TRUE for zero length string. Remove redundant includes.
+    Erik Hovland, erik at hovland dot org
+  * Fixed warning reported by adding -Wstrict-prototypes
+    -Wold-style-definition to the compilatin flags.
+    Dotan Barak, dotanba at gmail dot com
+  * Add const correctness to public interfaces
+    Gerard Krol, g dot c dot krol at student dot tudelft dot nl
+
+0.8
+===
+  * Add va_end for every va_start
+    Dotan Barak, dotanba at gmail dot com
+  * Add macros to enable compiling out debug code
+    Geoffrey Young, geoff at modperlcookbook dot org
+  * Fix bug with use of capital E in numbers with exponents
+    Mateusz Loskot, mateusz at loskot dot net
+  * Add stddef.h include
+  * Patch allows for json-c compile with -Werror and not fail due to
+    -Wmissing-prototypes -Wstrict-prototypes -Wmissing-declarations
+    Geoffrey Young, geoff at modperlcookbook dot org
+
+0.7
+===
+  * Add escaping of backslash to json output
+  * Add escaping of foward slash on tokenizing and output
+  * Changes to internal tokenizer from using recursion to
+    using a depth state structure to allow incremental parsing
+
+0.6
+===
+  * Fix bug in escaping of control characters
+    Johan Björklund, johbjo09 at kth dot se
+  * Remove include "config.h" from headers (should only
+    be included from .c files)
+    Michael Clark <michael@metaparadigm.com>
+
+0.5
+===
+  * Make headers C++ compatible by change *this to *obj
+  * Add ifdef C++ extern "C" to headers
+  * Use simpler definition of min and max in bits.h
+    Larry Lansing, llansing at fuzzynerd dot com
+
+  * Remove automake 1.6 requirement
+  * Move autogen commands into autogen.sh. Update README
+  * Remove error pointer special case for Windows
+  * Change license from LGPL to MIT
+    Michael Clark <michael@metaparadigm.com>
+
+0.4
+===
+  * Fix additional error case in object parsing
+  * Add back sign reversal in nested object parse as error pointer
+    value is negative, while error value is positive.
+    Michael Clark <michael@metaparadigm.com>
+
+0.3
+===
+  * fix pointer arithmetic bug for error pointer check in is_error() macro
+  * fix type passed to printbuf_memappend in json_tokener
+  * update autotools bootstrap instructions in README
+    Michael Clark <michael@metaparadigm.com>
+
+0.2
+===
+  * printbuf.c - C. Watford (christopher.watford@gmail.com)
+    Added a Win32/Win64 compliant implementation of vasprintf
+  * debug.c - C. Watford (christopher.watford@gmail.com)
+    Removed usage of vsyslog on Win32/Win64 systems, needs to be handled
+    by a configure script
+  * json_object.c - C. Watford (christopher.watford@gmail.com)
+    Added scope operator to wrap usage of json_object_object_foreach, this
+    needs to be rethought to be more ANSI C friendly
+  * json_object.h - C. Watford (christopher.watford@gmail.com)
+    Added Microsoft C friendly version of json_object_object_foreach
+  * json_tokener.c - C. Watford (christopher.watford@gmail.com)
+    Added a Win32/Win64 compliant implementation of strndup
+  * json_util.c - C. Watford (christopher.watford@gmail.com)
+    Added cast and mask to suffice size_t v. unsigned int conversion
+    correctness 
+  * json_tokener.c - sign reversal issue on error info for nested object parse
+    spotted by Johan Björklund (johbjo09 at kth.se)
+  * json_object.c - escape " in json_escape_str
+  * Change to automake and libtool to build shared and static library
+    Michael Clark <michael@metaparadigm.com>
+	
+0.1
+===
+  * initial release
diff --git a/third_party/json-c/INSTALL b/third_party/json-c/INSTALL
new file mode 100644
index 0000000000..5fb10a02cb
--- /dev/null
+++ b/third_party/json-c/INSTALL
@@ -0,0 +1,3 @@
+
+See README.md for installation instructions.
+
diff --git a/third_party/json-c/NEWS b/third_party/json-c/NEWS
new file mode 100644
index 0000000000..5798fb41b9
--- /dev/null
+++ b/third_party/json-c/NEWS
@@ -0,0 +1 @@
+See the git repo.
diff --git a/third_party/json-c/README.html b/third_party/json-c/README.html
new file mode 100644
index 0000000000..d36156952b
--- /dev/null
+++ b/third_party/json-c/README.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+	<head>
+		<title>JSON-C - A JSON implementation in C</title>
+		<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+	</head>
+	<body>
+		<h2>JSON-C - A JSON implementation in C</h2>
+
+		<h3>Overview</h3>
+		<p>JSON-C implements a reference counting object model that allows you to easily 
+		construct JSON objects in C, output them as JSON formatted strings and parse 
+		JSON formatted strings back into the C representation of JSON objects.
+		It aims to conform to <a href="https://tools.ietf.org/html/rfc7159">RFC 7159</a>.
+		</p>
+
+		<h3>Building</h3>
+		<p>To setup JSON-C to build on your system please run <tt>configure</tt> and <tt>make</tt>.</p>
+		<p>If you are on Win32 cmake is required, generally:</p>
+		<ul>
+		<li>mkdir build</li>
+		<li>cd build</li>
+		<li>cmake ..</li>
+		<li>msbuild "json-c.vcxproj" /m /verbosity:normal /p:OutDir=lib\</li>
+		<li>Or, open the project in Visual Studio</li>
+		</ul>
+
+		<h3>Documentation</h3>
+		<P>Doxygen generated documentation exists <a href="doc/html/json__object_8h.html">here</a>
+		and Win32 specific notes can be found <a href="README-WIN32.html">here</a>.</P>
+
+		<h3><a href="https://github.com/json-c/json-c">GIT Reposository</a></h3>
+		<p><strong><code>git clone https://github.com/json-c/json-c.git</code></strong></p>
+
+		<h3><a href="http://groups.google.com/group/json-c">Mailing List</a></h3>
+                <pi>Send email to <strong><code>json-c <i>&lt;at&gt;</i> googlegroups <i>&lt;dot&gt;</i> com</code></strong></p>
+
+		<h3><a href="COPYING">License</a></h3>
+		<p>This program is free software; you can redistribute it and/or modify it under the terms of the MIT License.</p>
+		<hr/>
+	</body>
+</html>
diff --git a/third_party/json-c/README.md b/third_party/json-c/README.md
new file mode 100644
index 0000000000..1441e933eb
--- /dev/null
+++ b/third_party/json-c/README.md
@@ -0,0 +1,173 @@
+`json-c`                       {#mainpage}
+========
+
+1. [Overview and Build Status](#overview)
+2. [Building on Unix](#buildunix)
+3. [Install Prerequisites](#installprereq)
+4. [Building with partial threading support](#buildthreaded)
+5. [Linking to libjson-c](#linking)
+6. [Using json-c](#using)
+
+JSON-C - A JSON implementation in C <a name="overview"></a>
+-----------------------------------
+
+Build Status
+* [AppVeyor Build](https://ci.appveyor.com/project/hawicz/json-c) ![AppVeyor Build Status](https://ci.appveyor.com/api/projects/status/github/json-c/json-c?branch=master&svg=true)
+* [Travis Build](https://travis-ci.org/json-c/json-c) ![Travis Build Status](https://travis-ci.org/json-c/json-c.svg?branch=master)
+
+JSON-C implements a reference counting object model that allows you to easily 
+construct JSON objects in C, output them as JSON formatted strings and parse 
+JSON formatted strings back into the C representation of JSON objects.
+It aims to conform to [RFC 7159](https://tools.ietf.org/html/rfc7159).
+
+
+Building on Unix with `git`, `gcc` and `autotools` <a name="buildunix"></a>
+--------------------------------------------------
+
+Home page for json-c: https://github.com/json-c/json-c/wiki
+
+### Prerequisites:
+
+See also the "Installing prerequisites" section below.
+
+ - `gcc`, `clang`, or another C compiler
+ - `libtool>=2.2.6b`
+
+If you're not using a release tarball, you'll also need:
+
+ - `autoconf>=2.64` (`autoreconf`)
+ - `automake>=1.13`
+
+Make sure you have a complete `libtool` install, including `libtoolize`.
+
+To generate docs (e.g. as part of make distcheck) you'll also need:
+ - `doxygen>=1.8.13`
+
+### Build instructions:
+
+`json-c` GitHub repo: https://github.com/json-c/json-c
+
+```sh
+$ git clone https://github.com/json-c/json-c.git
+$ cd json-c
+$ sh autogen.sh
+```
+
+followed by
+
+```sh
+$ ./configure  # --enable-threading
+$ make
+$ make install
+```
+
+To build and run the test programs:
+
+```sh
+$ make check
+$ make USE_VALGRIND=0 check   # optionally skip using valgrind
+```
+
+Install prerequisites <a name="installprereq"></a>
+-----------------------
+
+If you are on a relatively modern system, you'll likely be able to install
+the prerequisites using your OS's packaging system.  
+
+### Install using apt (e.g. Ubuntu 16.04.2 LTS)
+```sh
+sudo apt install git
+sudo apt install autoconf automake libtool
+sudo apt install valgrind # optional
+```
+
+Then start from the "git clone" command, above.
+
+### Manually install and build autoconf, automake and libtool
+
+For older OS's that don't have up-to-date version of the packages will
+require a bit more work. For example, CentOS release 5.11, etc...
+
+```sh
+curl -O http://ftp.gnu.org/gnu/autoconf/autoconf-2.69.tar.gz
+curl -O http://ftp.gnu.org/gnu/automake/automake-1.15.tar.gz
+curl -O http://ftp.gnu.org/gnu/libtool/libtool-2.2.6b.tar.gz
+
+tar xzf autoconf-2.69.tar.gz
+tar xzf automake-1.15.tar.gz
+tar xzf libtool-2.2.6b.tar.gz
+
+export PATH=${HOME}/ac_install/bin:$PATH
+
+(cd autoconf-2.69 && \
+  ./configure --prefix ${HOME}/ac_install && \
+  make && \
+  make install)
+
+(cd automake-1.15 && \
+  ./configure --prefix ${HOME}/ac_install && \
+  make && \
+  make install)
+
+(cd libtool-2.2.6b && \
+  ./configure --prefix ${HOME}/ac_install && \
+  make && \
+  make install)
+```
+
+
+Building with partial threading support <a name="buildthreaded"></a>
+----------------------------------------
+
+Although json-c does not support fully multi-threaded access to
+object trees, it has some code to help make use in threaded programs
+a bit safer.  Currently, this is limited to using atomic operations for
+json_object_get() and json_object_put().
+
+Since this may have a performance impact, of at least 3x slower
+according to https://stackoverflow.com/a/11609063, it is disabled by
+default.  You may turn it on by adjusting your configure command with:
+   --enable-threading
+
+Separately, the default hash function used for object field keys,
+lh_char_hash, uses a compare-and-swap operation to ensure the randomly
+seed is only generated once.  Because this is a one-time operation, it
+is always compiled in when the compare-and-swap operation is available.
+
+
+Linking to `libjson-c` <a name="linking">
+----------------------
+
+If your system has `pkgconfig`,
+then you can just add this to your `makefile`:
+
+```make
+CFLAGS += $(shell pkg-config --cflags json-c)
+LDFLAGS += $(shell pkg-config --libs json-c)
+```
+
+Without `pkgconfig`, you would do something like this:
+
+```make
+JSON_C_DIR=/path/to/json_c/install
+CFLAGS += -I$(JSON_C_DIR)/include/json-c
+LDFLAGS+= -L$(JSON_C_DIR)/lib -ljson-c
+```
+
+
+Using json-c <a name="using">
+------------
+
+To use json-c you can either include json.h, or preferrably, one of the
+following more specific header files:
+
+* json_object.h  - Core types and methods.
+* json_tokener.h - Methods for parsing and serializing json-c object trees.
+* json_pointer.h - JSON Pointer (RFC 6901) implementation for retrieving
+                   objects from a json-c object tree.
+* json_object_iterator.h - Methods for iterating over single json_object instances.
+* json_visit.h   - Methods for walking a tree of json-c objects.
+* json_util.h    - Miscelleanous utility functions.
+
+For a full list of headers see [files.html](files.html)
+
diff --git a/third_party/json-c/RELEASE_CHECKLIST.txt b/third_party/json-c/RELEASE_CHECKLIST.txt
new file mode 100644
index 0000000000..28cb97304c
--- /dev/null
+++ b/third_party/json-c/RELEASE_CHECKLIST.txt
@@ -0,0 +1,136 @@
+
+Release checklist:
+
+release=0.13
+git clone https://github.com/json-c/json-c json-c-${release}
+cd json-c-${release}
+
+Check that the compile works on Linux
+Check that the compile works on NetBSD
+Check that the compile works on Windows
+Run "make distcheck" and fix any problems
+	 (e.g. adding new files to SOURCES variables in Makefile.am)
+Check ChangeLog to see if anything should be added.
+Make any fixes/changes *before* branching.
+
+  git branch json-c-${release}
+  git checkout json-c-${release}
+
+------------
+
+Update the version in json_c_version.h
+Update the version in Doxyfile
+Update the version in configure.ac
+Update the version in CMakeLists.txt
+	Use ${release}.
+
+Update the libjson_la_LDFLAGS line in Makefile.am to the new version.
+	Generally, unless we're doing a major release, change:
+		-version-info x:y:z
+	to
+		-version-info x:y+1:z
+
+------------
+
+Generate the configure script and other files:
+  sh autogen.sh
+  git add -f Makefile.in aclocal.m4 config.guess config.h.in \
+       config.sub configure depcomp install-sh \
+       ltmain.sh missing tests/Makefile.in \
+       INSTALL
+
+  # check for anything else to be added:
+  git status --ignored
+  git commit
+
+------------
+
+Generate the doxygen documentation:
+  doxygen
+  git add -f doc
+  git commit doc
+
+------------
+
+cd ..
+echo .git > excludes
+echo autom4te.cache >> excludes
+tar -czf json-c-${release}.tar.gz -X excludes json-c-${release}
+
+echo doc >> excludes
+tar -czf json-c-${release}-nodoc.tar.gz -X excludes json-c-${release}
+
+------------
+
+Tag the branch:
+cd json-c-${release}
+git tag -a json-c-${release}-$(date +%Y%m%d) -m "Release json-c-${release}"
+
+git push origin json-c-${release}
+git push --tags
+
+------------
+
+Go to Amazon S3 service at:
+    https://console.aws.amazon.com/s3/
+
+Upload the two tarballs in the json-c_releases folder.
+	When uploading, use "Reduced Redundancy", and make the uploaded files publicly accessible.
+
+Logout of Amazon S3, and verify that the files are visible.
+    https://s3.amazonaws.com/json-c_releases/releases/index.html
+
+===================================
+
+Post-release checklist:
+
+git checkout master
+Add new section to ChangeLog
+Update the version in json_c_version.h
+Update the version in Doxyfile
+Update the version in configure.ac
+Update the version in CMakeLists.txt
+    Use ${release}.99 to indicate a version "newer" than anything on the branch.
+
+Leave the libjson_la_LDFLAGS line in Makefile.am alone.
+	For more details see:
+	http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
+
+------------
+
+Update the gh-pages branch with new docs:
+
+cd json-c-${release}
+git checkout json-c-${release}
+cd ..
+
+git clone -b gh-pages https://github.com/json-c/json-c json-c-pages
+cd json-c-pages
+mkdir json-c-${release}
+cp -R ../json-c-${release}/doc json-c-${release}/.
+cp ../json-c-${release}/README-WIN32.html json-c-${release}/.
+git add json-c-${release}
+git commit
+
+vi index.html
+    Add/change links to current release.
+
+git commit index.html
+
+git push
+
+------------
+
+Update checksums on wiki page.
+
+cd ..
+openssl sha -sha256 json-c*gz
+openssl md5 json-c*gz
+
+Copy and paste this output into the wiki page at:
+	https://github.com/json-c/json-c/wiki
+
+------------
+
+Send an email to the mailing list.
+
diff --git a/third_party/json-c/STYLE.txt b/third_party/json-c/STYLE.txt
new file mode 100755
index 0000000000..2dffbe7e02
--- /dev/null
+++ b/third_party/json-c/STYLE.txt
@@ -0,0 +1,31 @@
+In general:
+For minor changes to a function, copy the existing formatting.
+When changing the style, commit that separately from other changes.
+For new code and major changes to a function, switch to the official json-c style.
+
+Official json-c style:
+Aim for readability, not strict conformance to fixed style rules.
+These rules are not comprehensive.  Look to existing code for guidelines.
+Indentation is tab based, with continuations of long lines starting with tabs then spaces for alignment.
+Try to line up components of continuation lines with corresponding part of the line above (i.e. "indent -lp" effect), but avoid excessive identation tha causes extra line wraps. 
+ e.g. (T=tab, S=space):
+TTTTsome_long_func_call(arg1, arg2,
+TTTTSSSSSSSSSSSSSSSSSSSarg3, arg4);
+TTTTsome_reallly_really_long_func_name(arg1,
+TTTTTarg2, arg3, arg4);
+There should be a space between "if"/"while" and the following parenthesis.
+"case" lines are indented at the same level as the "switch" statement.
+Commas are followed by a single space.
+Include spaces around most non-unary, non-postfix operators, "=", "==', "&", "||", etc...
+Function calls have no space between the name and the parenthesis.
+Curly braces go on their own line.
+Curly braces may be omitted.
+
+Naming:
+Words within function and variable names are separated with underscores.  Avoid camel case.
+Prefer longer, more descriptive names, but not excessively so.  No single letter variable names.
+
+Other:
+Variables should be defined for the smallest scope needed.
+Functions should be defined static when possible.
+When possible, avoid exposing internals in the public API.
diff --git a/third_party/json-c/arraylist.c b/third_party/json-c/arraylist.c
new file mode 100644
index 0000000000..ddeb8d4eb4
--- /dev/null
+++ b/third_party/json-c/arraylist.c
@@ -0,0 +1,146 @@
+/*
+ * $Id: arraylist.c,v 1.4 2006/01/26 02:16:28 mclark Exp $
+ *
+ * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+#include "config.h"
+
+#include <limits.h>
+
+#ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <string.h>
+#endif /* STDC_HEADERS */
+
+#if defined(HAVE_STRINGS_H) && !defined(_STRING_H) && !defined(__USE_BSD)
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
+
+#ifndef SIZE_T_MAX
+#if SIZEOF_SIZE_T == SIZEOF_INT
+#define SIZE_T_MAX UINT_MAX
+#elif SIZEOF_SIZE_T == SIZEOF_LONG
+#define SIZE_T_MAX ULONG_MAX
+#elif SIZEOF_SIZE_T == SIZEOF_LONG_LONG
+#define SIZE_T_MAX ULLONG_MAX
+#else
+#error Unable to determine size of size_t
+#endif
+#endif
+
+#include "arraylist.h"
+
+struct array_list*
+array_list_new(array_list_free_fn *free_fn)
+{
+  struct array_list *arr;
+
+  arr = (struct array_list*)calloc(1, sizeof(struct array_list));
+  if(!arr) return NULL;
+  arr->size = ARRAY_LIST_DEFAULT_SIZE;
+  arr->length = 0;
+  arr->free_fn = free_fn;
+  if(!(arr->array = (void**)calloc(sizeof(void*), arr->size))) {
+    free(arr);
+    return NULL;
+  }
+  return arr;
+}
+
+extern void
+array_list_free(struct array_list *arr)
+{
+  size_t i;
+  for(i = 0; i < arr->length; i++)
+    if(arr->array[i]) arr->free_fn(arr->array[i]);
+  free(arr->array);
+  free(arr);
+}
+
+void*
+array_list_get_idx(struct array_list *arr, size_t i)
+{
+  if(i >= arr->length) return NULL;
+  return arr->array[i];
+}
+
+static int array_list_expand_internal(struct array_list *arr, size_t max)
+{
+  void *t;
+  size_t new_size;
+
+  if(max < arr->size) return 0;
+  /* Avoid undefined behaviour on size_t overflow */
+  if( arr->size >= SIZE_T_MAX / 2 )
+    new_size = max;
+  else
+  {
+    new_size = arr->size << 1;
+    if (new_size < max)
+      new_size = max;
+  }
+  if (new_size > (~((size_t)0)) / sizeof(void*)) return -1;
+  if (!(t = realloc(arr->array, new_size*sizeof(void*)))) return -1;
+  arr->array = (void**)t;
+  (void)memset(arr->array + arr->size, 0, (new_size-arr->size)*sizeof(void*));
+  arr->size = new_size;
+  return 0;
+}
+
+int
+array_list_put_idx(struct array_list *arr, size_t idx, void *data)
+{
+  if (idx > SIZE_T_MAX - 1 ) return -1;
+  if(array_list_expand_internal(arr, idx+1)) return -1;
+  if(idx < arr->length && arr->array[idx])
+    arr->free_fn(arr->array[idx]);
+  arr->array[idx] = data;
+  if(arr->length <= idx) arr->length = idx + 1;
+  return 0;
+}
+
+int
+array_list_add(struct array_list *arr, void *data)
+{
+  return array_list_put_idx(arr, arr->length, data);
+}
+
+void
+array_list_sort(struct array_list *arr, int(*sort_fn)(const void *, const void *))
+{
+  qsort(arr->array, arr->length, sizeof(arr->array[0]), sort_fn);
+}
+
+void* array_list_bsearch(const void **key, struct array_list *arr,
+		int (*sort_fn)(const void *, const void *))
+{
+	return bsearch(key, arr->array, arr->length, sizeof(arr->array[0]),
+			sort_fn);
+}
+
+size_t
+array_list_length(struct array_list *arr)
+{
+  return arr->length;
+}
+
+int
+array_list_del_idx( struct array_list *arr, size_t idx, size_t count )
+{
+	size_t i, stop;
+
+	stop = idx + count;
+	if ( idx >= arr->length || stop > arr->length ) return -1;
+	for ( i = idx; i < stop; ++i ) {
+		if ( arr->array[i] ) arr->free_fn( arr->array[i] );
+	}
+	memmove( arr->array + idx, arr->array + stop, (arr->length - stop) * sizeof(void*) );
+	arr->length -= count;
+	return 0;
+}
diff --git a/third_party/json-c/arraylist.h b/third_party/json-c/arraylist.h
new file mode 100644
index 0000000000..38603e8aa5
--- /dev/null
+++ b/third_party/json-c/arraylist.h
@@ -0,0 +1,70 @@
+/*
+ * $Id: arraylist.h,v 1.4 2006/01/26 02:16:28 mclark Exp $
+ *
+ * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+/**
+ * @file
+ * @brief Internal methods for working with json_type_array objects.
+ *        Although this is exposed by the json_object_get_array() method,
+ *        it is not recommended for direct use.
+ */
+#ifndef _arraylist_h_
+#define _arraylist_h_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define ARRAY_LIST_DEFAULT_SIZE 32
+
+typedef void (array_list_free_fn) (void *data);
+
+struct array_list
+{
+  void **array;
+  size_t length;
+  size_t size;
+  array_list_free_fn *free_fn;
+};
+typedef struct array_list array_list;
+
+extern struct array_list*
+array_list_new(array_list_free_fn *free_fn);
+
+extern void
+array_list_free(struct array_list *al);
+
+extern void*
+array_list_get_idx(struct array_list *al, size_t i);
+
+extern int
+array_list_put_idx(struct array_list *al, size_t i, void *data);
+
+extern int
+array_list_add(struct array_list *al, void *data);
+
+extern size_t
+array_list_length(struct array_list *al);
+
+extern void
+array_list_sort(struct array_list *arr, int(*compar)(const void *, const void *));
+
+extern void* array_list_bsearch(const void **key,
+		struct array_list *arr,
+		int (*sort_fn)(const void *, const void *));
+
+extern int 
+array_list_del_idx(struct array_list *arr, size_t idx, size_t count);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/third_party/json-c/bits.h b/third_party/json-c/bits.h
new file mode 100644
index 0000000000..14c1c132d3
--- /dev/null
+++ b/third_party/json-c/bits.h
@@ -0,0 +1,36 @@
+/**
+ * @file
+ * @brief Do not use, only contains deprecated defines.
+ * @deprecated Use json_util.h instead.
+ *
+ * $Id: bits.h,v 1.10 2006/01/30 23:07:57 mclark Exp $
+ *
+ * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+#ifndef _bits_h_
+#define _bits_h_
+
+/**
+ * @deprecated
+ */
+#define hexdigit(x) (((x) <= '9') ? (x) - '0' : ((x) & 7) + 9)
+/**
+ * @deprecated
+ */
+#define error_ptr(error) ((void*)error)
+/**
+ * @deprecated
+ */
+#define error_description(error)  (json_tokener_get_error(error))
+/**
+ * @deprecated
+ */
+#define is_error(ptr) (ptr == NULL)
+
+#endif
diff --git a/third_party/json-c/config.h.in b/third_party/json-c/config.h.in
new file mode 100644
index 0000000000..363eb349c0
--- /dev/null
+++ b/third_party/json-c/config.h.in
@@ -0,0 +1,196 @@
+/* config.h.in.  Generated from configure.ac by autoheader.  */
+
+/* Enable RDRAND Hardware RNG Hash Seed */
+#undef ENABLE_RDRAND
+
+/* Enable partial threading support */
+#undef ENABLE_THREADING
+
+/* Define if .gnu.warning accepts long strings. */
+#undef HAS_GNU_WARNING_LONG
+
+/* Has atomic builtins */
+#undef HAVE_ATOMIC_BUILTINS
+
+/* Define to 1 if you have the declaration of `INFINITY', and to 0 if you
+   don't. */
+#undef HAVE_DECL_INFINITY
+
+/* Define to 1 if you have the declaration of `isinf', and to 0 if you don't.
+   */
+#undef HAVE_DECL_ISINF
+
+/* Define to 1 if you have the declaration of `isnan', and to 0 if you don't.
+   */
+#undef HAVE_DECL_ISNAN
+
+/* Define to 1 if you have the declaration of `nan', and to 0 if you don't. */
+#undef HAVE_DECL_NAN
+
+/* Define to 1 if you have the declaration of `_finite', and to 0 if you
+   don't. */
+#undef HAVE_DECL__FINITE
+
+/* Define to 1 if you have the declaration of `_isnan', and to 0 if you don't.
+   */
+#undef HAVE_DECL__ISNAN
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#undef HAVE_DLFCN_H
+
+/* Define to 1 if you don't have `vprintf' but do have `_doprnt.' */
+#undef HAVE_DOPRNT
+
+/* Define to 1 if you have the <endian.h> header file. */
+#undef HAVE_ENDIAN_H
+
+/* Define to 1 if you have the <fcntl.h> header file. */
+#undef HAVE_FCNTL_H
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#undef HAVE_INTTYPES_H
+
+/* Define to 1 if you have the <limits.h> header file. */
+#undef HAVE_LIMITS_H
+
+/* Define to 1 if you have the <locale.h> header file. */
+#undef HAVE_LOCALE_H
+
+/* Define to 1 if you have the <memory.h> header file. */
+#undef HAVE_MEMORY_H
+
+/* Define to 1 if you have the `open' function. */
+#undef HAVE_OPEN
+
+/* Define to 1 if you have the `realloc' function. */
+#undef HAVE_REALLOC
+
+/* Define to 1 if you have the `setlocale' function. */
+#undef HAVE_SETLOCALE
+
+/* Define to 1 if you have the `snprintf' function. */
+#undef HAVE_SNPRINTF
+
+/* Define to 1 if you have the <stdarg.h> header file. */
+#undef HAVE_STDARG_H
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#undef HAVE_STDINT_H
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#undef HAVE_STDLIB_H
+
+/* Define to 1 if you have the `strcasecmp' function. */
+#undef HAVE_STRCASECMP
+
+/* Define to 1 if you have the `strdup' function. */
+#undef HAVE_STRDUP
+
+/* Define to 1 if you have the `strerror' function. */
+#undef HAVE_STRERROR
+
+/* Define to 1 if you have the <strings.h> header file. */
+#undef HAVE_STRINGS_H
+
+/* Define to 1 if you have the <string.h> header file. */
+#undef HAVE_STRING_H
+
+/* Define to 1 if you have the `strncasecmp' function. */
+#undef HAVE_STRNCASECMP
+
+/* Define to 1 if you have the <syslog.h> header file. */
+#undef HAVE_SYSLOG_H
+
+/* Define to 1 if you have the <sys/cdefs.h> header file. */
+#undef HAVE_SYS_CDEFS_H
+
+/* Define to 1 if you have the <sys/param.h> header file. */
+#undef HAVE_SYS_PARAM_H
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#undef HAVE_SYS_STAT_H
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#undef HAVE_SYS_TYPES_H
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#undef HAVE_UNISTD_H
+
+/* Define to 1 if you have the `uselocale' function. */
+#undef HAVE_USELOCALE
+
+/* Define to 1 if you have the `vasprintf' function. */
+#undef HAVE_VASPRINTF
+
+/* Define to 1 if you have the `vprintf' function. */
+#undef HAVE_VPRINTF
+
+/* Define to 1 if you have the `vsnprintf' function. */
+#undef HAVE_VSNPRINTF
+
+/* Define to 1 if you have the `vsyslog' function. */
+#undef HAVE_VSYSLOG
+
+/* Define to 1 if you have the <xlocale.h> header file. */
+#undef HAVE_XLOCALE_H
+
+/* Have __thread */
+#undef HAVE___THREAD
+
+/* Public define for json_inttypes.h */
+#undef JSON_C_HAVE_INTTYPES_H
+
+/* Define to the sub-directory in which libtool stores uninstalled libraries.
+   */
+#undef LT_OBJDIR
+
+/* Name of package */
+#undef PACKAGE
+
+/* Define to the address where bug reports for this package should be sent. */
+#undef PACKAGE_BUGREPORT
+
+/* Define to the full name of this package. */
+#undef PACKAGE_NAME
+
+/* Define to the full name and version of this package. */
+#undef PACKAGE_STRING
+
+/* Define to the one symbol short name of this package. */
+#undef PACKAGE_TARNAME
+
+/* Define to the home page for this package. */
+#undef PACKAGE_URL
+
+/* Define to the version of this package. */
+#undef PACKAGE_VERSION
+
+/* The number of bytes in type int */
+#undef SIZEOF_INT
+
+/* The number of bytes in type int64_t */
+#undef SIZEOF_INT64_T
+
+/* The number of bytes in type long */
+#undef SIZEOF_LONG
+
+/* The number of bytes in type long long */
+#undef SIZEOF_LONG_LONG
+
+/* The number of bytes in type size_t */
+#undef SIZEOF_SIZE_T
+
+/* Specifier for __thread */
+#undef SPEC___THREAD
+
+/* Define to 1 if you have the ANSI C header files. */
+#undef STDC_HEADERS
+
+/* Version number of package */
+#undef VERSION
+
+/* Define to empty if `const' does not conform to ANSI C. */
+#undef const
+
+/* Define to `unsigned int' if <sys/types.h> does not define. */
+#undef size_t
diff --git a/third_party/json-c/config.h.win32 b/third_party/json-c/config.h.win32
new file mode 100644
index 0000000000..eda08474f3
--- /dev/null
+++ b/third_party/json-c/config.h.win32
@@ -0,0 +1,205 @@
+/* config.h.in.  Generated from configure.ac by autoheader.  */
+
+/* Enable RDRANR Hardware RNG Hash Seed */
+#undef ENABLE_RDRAND
+
+/* Define if .gnu.warning accepts long strings. */
+#undef HAS_GNU_WARNING_LONG
+
+/* Define to 1 if you have the declaration of `INFINITY', and to 0 if you
+   don't. */
+#if (defined(_MSC_VER) && _MSC_VER >= 1800) || defined(__MINGW32__)
+#define HAVE_DECL_INFINITY 1
+#endif
+
+/* Define to 1 if you have the declaration of `isinf', and to 0 if you don't.
+   */
+#if (defined(_MSC_VER) && _MSC_VER >= 1800) || defined(__MINGW32__)
+#define HAVE_DECL_ISINF 1
+#endif
+
+/* Define to 1 if you have the declaration of `isnan', and to 0 if you don't.
+   */
+#if (defined(_MSC_VER) && _MSC_VER >= 1800) || defined(__MINGW32__)
+#define HAVE_DECL_ISNAN 1
+#endif
+
+/* Define to 1 if you have the declaration of `nan', and to 0 if you don't. */
+#if (defined(_MSC_VER) && _MSC_VER >= 1800) || defined(__MINGW32__)
+#define HAVE_DECL_NAN 1
+#endif
+
+/* Define to 1 if you have the declaration of `_finite', and to 0 if you
+   don't. */
+#define HAVE_DECL__FINITE 1
+
+/* Define to 1 if you have the declaration of `_isnan', and to 0 if you don't.
+   */
+#define HAVE_DECL__ISNAN 1
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#define HAVE_DLFCN_H 1
+
+/* Define to 1 if you don't have `vprintf' but do have `_doprnt.' */
+#define HAVE_DOPRNT 1
+
+/* Define to 1 if you have the <endian.h> header file. */
+#undef HAVE_ENDIAN_H
+
+/* Define to 1 if you have the <fcntl.h> header file. */
+#define HAVE_FCNTL_H 1
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#define HAVE_INTTYPES_H 1
+
+/* Define to 1 if you have the <limits.h> header file. */
+#define HAVE_LIMITS_H 1
+
+/* Define to 1 if you have the <locale.h> header file. */
+#define HAVE_LOCALE_H 1
+
+/* Define to 1 if your system has a GNU libc compatible `malloc' function, and
+   to 0 otherwise. */
+#define HAVE_MALLOC 1
+
+/* Define to 1 if you have the <memory.h> header file. */
+#define HAVE_MEMORY_H 1
+
+/* Define to 1 if you have the `open' function. */
+#define HAVE_OPEN 1
+
+/* Define to 1 if your system has a GNU libc compatible `realloc' function,
+   and to 0 otherwise. */
+#define HAVE_REALLOC 1
+
+/* Define to 1 if you have the `setlocale' function. */
+#define HAVE_SETLOCALE 1
+
+/* Define to 1 if you have the `snprintf' function. */
+#if defined(__MINGW32__)
+#define HAVE_SNPRINTF 1
+#else
+#undef HAVE_SNPRINTF
+#endif
+
+/* Define to 1 if you have the <stdarg.h> header file. */
+#define HAVE_STDARG_H 1
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#define HAVE_STDINT_H 1
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#define HAVE_STDLIB_H 1
+
+/* Define to 1 if you have the `strcasecmp' function. */
+#define HAVE_STRCASECMP 1
+
+/* Define to 1 if you have the `strdup' function. */
+#define HAVE_STRDUP 0
+
+/* Define to 1 if you have the `strerror' function. */
+#define HAVE_STRERROR 1
+
+/* Define to 1 if you have the <strings.h> header file. */
+#undef HAVE_STRINGS_H
+
+/* Define to 1 if you have the <string.h> header file. */
+#define HAVE_STRING_H 1
+
+/* Define to 1 if you have the `strncasecmp' function. */
+#if defined(__MINGW32__)
+#define HAVE_STRNCASECMP 1
+#else
+#undef HAVE_STRNCASECMP
+#endif
+
+#cmakedefine HAVE_STRTOLL
+#cmakedefine strtoll @cmake_strtoll@
+
+/* Define to 1 if you have the <syslog.h> header file. */
+#undef HAVE_SYSLOG_H
+
+/* Define to 1 if you have the <sys/cdefs.h> header file. */
+#define HAVE_SYS_CDEFS_H 1
+
+/* Define to 1 if you have the <sys/param.h> header file. */
+#if defined(__MINGW32__)
+#define HAVE_SYS_PARAM_H 1
+#else
+#undef HAVE_SYS_PARAM_H
+#endif
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#define HAVE_SYS_STAT_H 1
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#define HAVE_SYS_TYPES_H 1
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#if defined(__MINGW32__)
+#define HAVE_UNISTD_H 1
+#else
+#undef HAVE_UNISTD_H
+#endif
+
+/* Define to 1 if you have the `vasprintf' function. */
+#if defined(__MINGW32__)
+#define HAVE_VASPRINTF 1
+#else
+#undef HAVE_VASPRINTF
+#endif
+
+/* Define to 1 if you have the `vprintf' function. */
+#define HAVE_VPRINTF 1
+
+/* Define to 1 if you have the `vsnprintf' function. */
+#define HAVE_VSNPRINTF 1
+
+/* Define to 1 if you have the `vsyslog' function. */
+#undef HAVE_VSYSLOG
+
+/* Define to the sub-directory in which libtool stores uninstalled libraries.
+   */
+#undef LT_OBJDIR
+
+/* Define to 1 if your C compiler doesn't accept -c and -o together. */
+/* #undef NO_MINUS_C_MINUS_O */
+
+/* Name of package */
+#define PACKAGE "json-c"
+
+/* Define to the address where bug reports for this package should be sent. */
+#define PACKAGE_BUGREPORT "json-c@googlegroups.com"
+
+/* Define to the full name of this package. */
+#define PACKAGE_NAME "JSON C Library"
+
+/* Define to the full name and version of this package. */
+#define PACKAGE_STRING "JSON C Library 0.13.1"
+
+/* Define to the one symbol short name of this package. */
+#define PACKAGE_TARNAME "json-c"
+
+/* Define to the home page for this package. */
+#define PACKAGE_URL "https://github.com/json-c/json-c"
+
+/* Define to the version of this package. */
+#define PACKAGE_VERSION "0.13.1"
+
+/* Define to 1 if you have the ANSI C header files. */
+#define STDC_HEADERS 1
+
+/* Version number of package */
+#define VERSION "0.13.1"
+
+/* Define to empty if `const' does not conform to ANSI C. */
+/* #undef const */
+
+/* Define to rpl_malloc if the replacement function should be used. */
+/* #undef malloc */
+
+/* Define to rpl_realloc if the replacement function should be used. */
+/* #undef realloc */
+
+/* Define to `unsigned int' if <sys/types.h> does not define. */
+/* #undef size_t */
diff --git a/third_party/json-c/debug.c b/third_party/json-c/debug.c
new file mode 100644
index 0000000000..4b5140aec1
--- /dev/null
+++ b/third_party/json-c/debug.c
@@ -0,0 +1,83 @@
+/*
+ * $Id: debug.c,v 1.5 2006/01/26 02:16:28 mclark Exp $
+ *
+ * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+
+#if HAVE_SYSLOG_H
+# include <syslog.h>
+#endif /* HAVE_SYSLOG_H */
+
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+
+#if HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif /* HAVE_SYS_PARAM_H */
+
+#include "debug.h"
+
+static int _syslog = 0;
+static int _debug = 0;
+
+void mc_set_debug(int debug) { _debug = debug; }
+int mc_get_debug(void) { return _debug; }
+
+extern void mc_set_syslog(int syslog)
+{
+  _syslog = syslog;
+}
+
+void mc_debug(const char *msg, ...)
+{
+  va_list ap;
+  if(_debug) {
+    va_start(ap, msg);
+#if HAVE_VSYSLOG
+    if(_syslog) {
+		vsyslog(LOG_DEBUG, msg, ap);
+	} else
+#endif
+		vprintf(msg, ap);
+    va_end(ap);
+  }
+}
+
+void mc_error(const char *msg, ...)
+{
+  va_list ap;
+  va_start(ap, msg);
+#if HAVE_VSYSLOG
+    if(_syslog) {
+		vsyslog(LOG_ERR, msg, ap);
+	} else
+#endif
+		vfprintf(stderr, msg, ap);
+  va_end(ap);
+}
+
+void mc_info(const char *msg, ...)
+{
+  va_list ap;
+  va_start(ap, msg);
+#if HAVE_VSYSLOG
+    if(_syslog) {
+		vsyslog(LOG_INFO, msg, ap);
+	} else
+#endif
+		vfprintf(stderr, msg, ap);
+  va_end(ap);
+}
diff --git a/third_party/json-c/debug.h b/third_party/json-c/debug.h
new file mode 100644
index 0000000000..07fcc380b3
--- /dev/null
+++ b/third_party/json-c/debug.h
@@ -0,0 +1,75 @@
+/*
+ * $Id: debug.h,v 1.5 2006/01/30 23:07:57 mclark Exp $
+ *
+ * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ * Copyright (c) 2009 Hewlett-Packard Development Company, L.P.
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+/**
+ * @file
+ * @brief Do not use, json-c internal, may be changed or removed at any time.
+ */
+#ifndef _DEBUG_H_
+#define _DEBUG_H_
+
+#include <stdlib.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern void mc_set_debug(int debug);
+extern int mc_get_debug(void);
+
+extern void mc_set_syslog(int syslog);
+
+extern void mc_debug(const char *msg, ...);
+extern void mc_error(const char *msg, ...);
+extern void mc_info(const char *msg, ...);
+
+#ifndef __STRING
+#define __STRING(x) #x
+#endif
+
+#ifndef PARSER_BROKEN_FIXED
+
+#define JASSERT(cond) do {} while(0)
+
+#else
+
+#define JASSERT(cond) do { \
+		if (!(cond)) { \
+			mc_error("cjson assert failure %s:%d : cond \"" __STRING(cond) "failed\n", __FILE__, __LINE__); \
+			*(int *)0 = 1;\
+			abort(); \
+		}\
+	} while(0)
+
+#endif
+
+#define MC_ERROR(x, ...) mc_error(x, ##__VA_ARGS__)
+
+#ifdef MC_MAINTAINER_MODE
+#define MC_SET_DEBUG(x) mc_set_debug(x)
+#define MC_GET_DEBUG() mc_get_debug()
+#define MC_SET_SYSLOG(x) mc_set_syslog(x)
+#define MC_DEBUG(x, ...) mc_debug(x, ##__VA_ARGS__)
+#define MC_INFO(x, ...) mc_info(x, ##__VA_ARGS__)
+#else
+#define MC_SET_DEBUG(x) if (0) mc_set_debug(x)
+#define MC_GET_DEBUG() (0)
+#define MC_SET_SYSLOG(x) if (0) mc_set_syslog(x)
+#define MC_DEBUG(x, ...) if (0) mc_debug(x, ##__VA_ARGS__)
+#define MC_INFO(x, ...) if (0) mc_info(x, ##__VA_ARGS__)
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/third_party/json-c/issues_closed_for_0.13.md b/third_party/json-c/issues_closed_for_0.13.md
new file mode 100644
index 0000000000..a29e43705f
--- /dev/null
+++ b/third_party/json-c/issues_closed_for_0.13.md
@@ -0,0 +1,267 @@
+
+This list was created with:
+
+curl https://api.github.com/search/issues?q="repo%3Ajson-c%2Fjson-c+closed%3A>2014-04-10+created%3A<2017-12-01&sort=created&order=asc&per_page=400&page=1" > issues1.out
+curl https://api.github.com/search/issues?q="repo%3Ajson-c%2Fjson-c+closed%3A>2014-04-10+created%3A<2017-12-01&sort=created&order=asc&per_page=400&page=2" > issues2.out
+curl https://api.github.com/search/issues?q="repo%3Ajson-c%2Fjson-c+closed%3A>2014-04-10+created%3A<2017-12-01&sort=created&order=asc&per_page=400&page=3" > issues3.out
+jq -r '.items[] | "[" + .title + "](" + .url + ")" | tostring' issues?.out  > issues.md
+#... manual editing ...
+
+----
+
+Issues and Pull Requests closed for the 0.13 release
+(since commit f84d9c, the 0.12 branch point, 2014-04-10)
+
+[Make json_object_object_add() indicate success or failure, test fix](https://api.github.com/repos/json-c/json-c/issues/61)
+[Build fixes (make dist and make distcheck)](https://api.github.com/repos/json-c/json-c/issues/113)
+[Fixing build](https://api.github.com/repos/json-c/json-c/issues/124)
+[Fix compile error(variable size set but not used) on g++4.6](https://api.github.com/repos/json-c/json-c/issues/125)
+[Removed unused size variable.](https://api.github.com/repos/json-c/json-c/issues/126)
+[remove unused `size` variable](https://api.github.com/repos/json-c/json-c/issues/127)
+[Remove unused variable from json_tokenizer.c](https://api.github.com/repos/json-c/json-c/issues/128)
+[Failed to compile under Ubuntu 13.10 32bit](https://api.github.com/repos/json-c/json-c/issues/130)
+[undefined symbol: __sync_val_compare_and_swap_4 ](https://api.github.com/repos/json-c/json-c/issues/131)
+[Remove unused variable 'size'](https://api.github.com/repos/json-c/json-c/issues/132)
+[Update and rename README to README.md](https://api.github.com/repos/json-c/json-c/issues/133)
+[Must remove variable size...](https://api.github.com/repos/json-c/json-c/issues/134)
+[bits.h uses removed json_tokener_errors\[error\]](https://api.github.com/repos/json-c/json-c/issues/135)
+[Error when running make check](https://api.github.com/repos/json-c/json-c/issues/136)
+[config.h.in should not be in git](https://api.github.com/repos/json-c/json-c/issues/137)
+[Can't build on RHEL 6.5 due to dependency on automake-1.14](https://api.github.com/repos/json-c/json-c/issues/138)
+[Code bug in random_test.c evaluating same expression twice ](https://api.github.com/repos/json-c/json-c/issues/140)
+[Removed duplicate check in random_seed test - bug #140](https://api.github.com/repos/json-c/json-c/issues/141)
+[Please undeprecate json_object_object_get](https://api.github.com/repos/json-c/json-c/issues/142)
+[Introduce json_object_from_fd](https://api.github.com/repos/json-c/json-c/issues/144)
+[Handle % character properly](https://api.github.com/repos/json-c/json-c/issues/145)
+[TAGS rename](https://api.github.com/repos/json-c/json-c/issues/146)
+[Bump the soname](https://api.github.com/repos/json-c/json-c/issues/148)
+[SONAME bump](https://api.github.com/repos/json-c/json-c/issues/149)
+[Fix build using MinGW.](https://api.github.com/repos/json-c/json-c/issues/150)
+[Remove json_type enum trailing comma](https://api.github.com/repos/json-c/json-c/issues/151)
+[error while compiling json-c library version 0.11](https://api.github.com/repos/json-c/json-c/issues/152)
+[improve doc for json_object_to_json_string()](https://api.github.com/repos/json-c/json-c/issues/153)
+[double precision](https://api.github.com/repos/json-c/json-c/issues/154)
+[add bsearch for arrays](https://api.github.com/repos/json-c/json-c/issues/155)
+[Remove trailing whitespaces](https://api.github.com/repos/json-c/json-c/issues/156)
+[JSON-C shall not exit on calloc fail.](https://api.github.com/repos/json-c/json-c/issues/157)
+[while using json-c 0.11, I am facing strange crash issue in json_object_put.](https://api.github.com/repos/json-c/json-c/issues/158)
+[json_tokener.c compile error](https://api.github.com/repos/json-c/json-c/issues/159)
+[missing header file on windows??](https://api.github.com/repos/json-c/json-c/issues/160)
+[Is there a way to append to file?](https://api.github.com/repos/json-c/json-c/issues/161)
+[json_util: add directory check for POSIX distros](https://api.github.com/repos/json-c/json-c/issues/162)
+[Fix Win32 build problems](https://api.github.com/repos/json-c/json-c/issues/163)
+[made it compile and link on Widnows (as static library)](https://api.github.com/repos/json-c/json-c/issues/164)
+[json_object_to_json_string_ext length](https://api.github.com/repos/json-c/json-c/issues/165)
+[Can't build on Windows with Visual Studio 2010](https://api.github.com/repos/json-c/json-c/issues/167)
+[Tightening the number parsing algorithm](https://api.github.com/repos/json-c/json-c/issues/168)
+[Doesn't compile on ubuntu 14.04, 64bit](https://api.github.com/repos/json-c/json-c/issues/169)
+[Generated files in repository](https://api.github.com/repos/json-c/json-c/issues/170)
+[Update configuration for VS2010 and win64](https://api.github.com/repos/json-c/json-c/issues/171)
+[Adding support for parsing octal numbers](https://api.github.com/repos/json-c/json-c/issues/172)
+[json_parse_int64 doesn't work correctly at illumos](https://api.github.com/repos/json-c/json-c/issues/173)
+[Adding JSON_C_TO_STRING_PRETTY_TAB flag](https://api.github.com/repos/json-c/json-c/issues/174)
+[make check fails 4 tests with overflows when built with ASAN](https://api.github.com/repos/json-c/json-c/issues/175)
+[Possible to delete an array element at a given idx ?](https://api.github.com/repos/json-c/json-c/issues/176)
+[Fix compiler warnings](https://api.github.com/repos/json-c/json-c/issues/177)
+[Unable to compile on CentOS5](https://api.github.com/repos/json-c/json-c/issues/178)
+[Added array_list_del_idx and json_object_array_del_idx](https://api.github.com/repos/json-c/json-c/issues/179)
+[Enable silent build by default](https://api.github.com/repos/json-c/json-c/issues/180)
+[json_tokener_parse_ex accepts invalid JSON](https://api.github.com/repos/json-c/json-c/issues/181)
+[Link against libm when needed](https://api.github.com/repos/json-c/json-c/issues/182)
+[Apply compile warning fix to master branch](https://api.github.com/repos/json-c/json-c/issues/183)
+[Use only GCC-specific flags when compiling with GCC](https://api.github.com/repos/json-c/json-c/issues/184)
+[compile error](https://api.github.com/repos/json-c/json-c/issues/185)
+[Syntax error](https://api.github.com/repos/json-c/json-c/issues/186)
+[array_list_get_idx and negative indexes.](https://api.github.com/repos/json-c/json-c/issues/187)
+[json_object_object_foreach warnings](https://api.github.com/repos/json-c/json-c/issues/188)
+[noisy json_object_from_file: error opening file](https://api.github.com/repos/json-c/json-c/issues/189)
+[warning: initialization discards const qualifier from pointer target type \[enabled by default\]](https://api.github.com/repos/json-c/json-c/issues/190)
+[json_tokener_parse  accepts invalid JSON {"key": "value" ,  }](https://api.github.com/repos/json-c/json-c/issues/192)
+[Make serialization format of doubles configurable](https://api.github.com/repos/json-c/json-c/issues/193)
+[Add utility function for comparing json_objects](https://api.github.com/repos/json-c/json-c/issues/194)
+[Call uselocale instead of setlocale](https://api.github.com/repos/json-c/json-c/issues/195)
+[Performance improvements](https://api.github.com/repos/json-c/json-c/issues/196)
+[Time for a new release?](https://api.github.com/repos/json-c/json-c/issues/197)
+[Fix possible memory leak and remove superfluous NULL checks before free()](https://api.github.com/repos/json-c/json-c/issues/198)
+[Fix build in Visual Studio](https://api.github.com/repos/json-c/json-c/issues/199)
+[Add build scripts for CI platforms](https://api.github.com/repos/json-c/json-c/issues/200)
+[disable forward-slash escaping?](https://api.github.com/repos/json-c/json-c/issues/201)
+[Array with objects support](https://api.github.com/repos/json-c/json-c/issues/202)
+[Add source position/coordinates to API](https://api.github.com/repos/json-c/json-c/issues/203)
+[json-c/json.h not found ](https://api.github.com/repos/json-c/json-c/issues/204)
+[json-c Compiled with Visual Studios](https://api.github.com/repos/json-c/json-c/issues/205)
+[what do i use in place of json_object_object_get?](https://api.github.com/repos/json-c/json-c/issues/206)
+[Add support for property pairs directly added to arrays](https://api.github.com/repos/json-c/json-c/issues/207)
+[Performance enhancements (mainly) to json_object_to_json_string()](https://api.github.com/repos/json-c/json-c/issues/208)
+[fix regression from 2d549662be832da838aa063da2efa78ee3b99668](https://api.github.com/repos/json-c/json-c/issues/209)
+[Use size_t for arrays](https://api.github.com/repos/json-c/json-c/issues/210)
+[Atomic updates for the refcount](https://api.github.com/repos/json-c/json-c/issues/211)
+[Refcount doesn't work between threads](https://api.github.com/repos/json-c/json-c/issues/212)
+[fix to compile with microsoft visual c++ 2010](https://api.github.com/repos/json-c/json-c/issues/213)
+[Some non-GNU systems support __sync_val_compare_and_swap](https://api.github.com/repos/json-c/json-c/issues/214)
+[Build json-c for window 64 bit.](https://api.github.com/repos/json-c/json-c/issues/215)
+[configure: check realloc with AC_CHECK_FUNCS() to fix cross-compilation.](https://api.github.com/repos/json-c/json-c/issues/216)
+[Checking for functions in float.h](https://api.github.com/repos/json-c/json-c/issues/217)
+[Use a macro to indicate C99 to the compiler](https://api.github.com/repos/json-c/json-c/issues/218)
+[Fix various potential null ptr deref and int32 overflows](https://api.github.com/repos/json-c/json-c/issues/219)
+[Add utility function for comparing json_objects](https://api.github.com/repos/json-c/json-c/issues/220)
+[JSON_C_TO_STRING_NOSLASHESCAPE works incorrectly](https://api.github.com/repos/json-c/json-c/issues/221)
+[Fix issue #221: JSON_C_TO_STRING_NOSLASHESCAPE works incorrectly](https://api.github.com/repos/json-c/json-c/issues/222)
+[Clarify json_object_get_string documentation of NULL handling & return](https://api.github.com/repos/json-c/json-c/issues/223)
+[json_tokener.c - all warnings being treated as errors](https://api.github.com/repos/json-c/json-c/issues/224)
+[Hi, will you support clib as a "registry"?](https://api.github.com/repos/json-c/json-c/issues/225)
+[Bump SOVERSION to 3](https://api.github.com/repos/json-c/json-c/issues/227)
+[avoid double slashes from json](https://api.github.com/repos/json-c/json-c/issues/228)
+[configure fails: checking size of size_t... configure: error: cannot determine a size for size_t](https://api.github.com/repos/json-c/json-c/issues/229)
+[Use stdint.h to check for size_t size](https://api.github.com/repos/json-c/json-c/issues/230)
+[Fix size_t size check for first-time builds](https://api.github.com/repos/json-c/json-c/issues/231)
+[tests/tests1: fix printf format for size_t arguments](https://api.github.com/repos/json-c/json-c/issues/232)
+[Include stddef.h in json_object.h](https://api.github.com/repos/json-c/json-c/issues/233)
+[Add public API to use userdata independently of custom serializer](https://api.github.com/repos/json-c/json-c/issues/234)
+[Undefined symbols Error for architecture x86_64 on Mac ](https://api.github.com/repos/json-c/json-c/issues/235)
+[Building a project which uses json-c with flag -Wcast-qual causes compilation errors](https://api.github.com/repos/json-c/json-c/issues/236)
+[handle escaped utf-8](https://api.github.com/repos/json-c/json-c/issues/237)
+[linkhash.c: optimised the table_free path](https://api.github.com/repos/json-c/json-c/issues/238)
+[initialize null terminator of new printbuf](https://api.github.com/repos/json-c/json-c/issues/239)
+[Compile error: Variable set but not used](https://api.github.com/repos/json-c/json-c/issues/240)
+[getting error in date string 19\/07\/2016, fixed for error 19/07/2016](https://api.github.com/repos/json-c/json-c/issues/241)
+[json_tokener_parse error](https://api.github.com/repos/json-c/json-c/issues/242)
+[Fix #165](https://api.github.com/repos/json-c/json-c/issues/243)
+[Error while compiling source from RHEL5, could you please help me to fix this ](https://api.github.com/repos/json-c/json-c/issues/244)
+[json-c compile in window xp](https://api.github.com/repos/json-c/json-c/issues/245)
+[Mac: uselocale failed to build](https://api.github.com/repos/json-c/json-c/issues/246)
+[json_object_array_del_idx function has segment fault error?](https://api.github.com/repos/json-c/json-c/issues/247)
+[Minor changes in C source code](https://api.github.com/repos/json-c/json-c/issues/248)
+[Improving README](https://api.github.com/repos/json-c/json-c/issues/249)
+[Improving .gitignore](https://api.github.com/repos/json-c/json-c/issues/250)
+[Adding a file for EditorConfig](https://api.github.com/repos/json-c/json-c/issues/251)
+[Very minor changes not related to C source code](https://api.github.com/repos/json-c/json-c/issues/252)
+[Adding a test with cppcheck for Travis CI](https://api.github.com/repos/json-c/json-c/issues/253)
+[Very minor changes to some tests](https://api.github.com/repos/json-c/json-c/issues/254)
+[Minor changes in C source code](https://api.github.com/repos/json-c/json-c/issues/255)
+[Mailing list dead?](https://api.github.com/repos/json-c/json-c/issues/256)
+[Defining a coding style](https://api.github.com/repos/json-c/json-c/issues/257)
+[Enable CI services](https://api.github.com/repos/json-c/json-c/issues/258)
+[Fails to parse valid json](https://api.github.com/repos/json-c/json-c/issues/259)
+[Adding an object to itself](https://api.github.com/repos/json-c/json-c/issues/260)
+[Lack of proper documentation](https://api.github.com/repos/json-c/json-c/issues/261)
+[Add Cmakefile and fix compiler warning.](https://api.github.com/repos/json-c/json-c/issues/262)
+[Compiler Warnings with VS2015](https://api.github.com/repos/json-c/json-c/issues/263)
+[successed in simple test   while failed in my project](https://api.github.com/repos/json-c/json-c/issues/264)
+[Conformance report for reference](https://api.github.com/repos/json-c/json-c/issues/265)
+[crash perhaps related to reference counting](https://api.github.com/repos/json-c/json-c/issues/266)
+[Removes me as Win32 maintainer, because I'm not.](https://api.github.com/repos/json-c/json-c/issues/267)
+[Documentation of json_object_to_json_string gives no information about memory management](https://api.github.com/repos/json-c/json-c/issues/268)
+[json_object_<type>_set(json_object *o,<type> value) API for value setting in json object private structure](https://api.github.com/repos/json-c/json-c/issues/269)
+[new API json_object_new_double_f(doubel d,const char * fmt);](https://api.github.com/repos/json-c/json-c/issues/270)
+[Cannot compile using CMake on macOS](https://api.github.com/repos/json-c/json-c/issues/271)
+[fixed wrong object name in json_object_all_values_equal](https://api.github.com/repos/json-c/json-c/issues/273)
+[Support for 64 bit pointers on Windows](https://api.github.com/repos/json-c/json-c/issues/274)
+[Out-of-bounds read in json_tokener_parse_ex](https://api.github.com/repos/json-c/json-c/issues/275)
+[ ./configure for centos release 6.7(final) failure](https://api.github.com/repos/json-c/json-c/issues/276)
+[Json object set xxx](https://api.github.com/repos/json-c/json-c/issues/277)
+[Serialization of double with no fractional component drops trailing zero](https://api.github.com/repos/json-c/json-c/issues/278)
+[Segmentation fault in array_list_length()](https://api.github.com/repos/json-c/json-c/issues/279)
+[Should json_object_array_get_idx  check whether input obj is array? ](https://api.github.com/repos/json-c/json-c/issues/280)
+[how to pretty print json-c? ](https://api.github.com/repos/json-c/json-c/issues/281)
+[ignore temporary files](https://api.github.com/repos/json-c/json-c/issues/282)
+[json_pointer: add first revision based on RFC 6901](https://api.github.com/repos/json-c/json-c/issues/283)
+[Resusing  json_tokener object](https://api.github.com/repos/json-c/json-c/issues/284)
+[Revert "compat/strdup.h: move common compat check for strdup() to own](https://api.github.com/repos/json-c/json-c/issues/285)
+[json_tokener_parse_ex() returns json_tokener_continue on zero-length string](https://api.github.com/repos/json-c/json-c/issues/286)
+[json_pointer: extend setter & getter with printf() style arguments](https://api.github.com/repos/json-c/json-c/issues/287)
+[Fix _GNU_SOURCE define for vasprintf](https://api.github.com/repos/json-c/json-c/issues/288)
+[bugfix: floating point representaion without fractional part ](https://api.github.com/repos/json-c/json-c/issues/289)
+[duplicate an json_object](https://api.github.com/repos/json-c/json-c/issues/290)
+[isspace assert error](https://api.github.com/repos/json-c/json-c/issues/291)
+[configure error  "./configure: line 13121: syntax error near unexpected token `-Wall'"](https://api.github.com/repos/json-c/json-c/issues/292)
+[how to make with bitcode for ios](https://api.github.com/repos/json-c/json-c/issues/293)
+[Adding UTF-8 validation.  Fixes #122](https://api.github.com/repos/json-c/json-c/issues/294)
+[cross compile w/ mingw](https://api.github.com/repos/json-c/json-c/issues/295)
+[Missing functions header in json_object.h](https://api.github.com/repos/json-c/json-c/issues/296)
+[could not parse string to Json object? Like string str=\"helloworld;E\\test\\log\\;end\"](https://api.github.com/repos/json-c/json-c/issues/297)
+[Building using CMake doesn't work](https://api.github.com/repos/json-c/json-c/issues/298)
+[Improve json_object -> string performance](https://api.github.com/repos/json-c/json-c/issues/299)
+[Running tests with MinGW build](https://api.github.com/repos/json-c/json-c/issues/300)
+[How to deep copy  json_object in C++ ?](https://api.github.com/repos/json-c/json-c/issues/301)
+[json_tokener_parse_ex doesn't parse JSON values](https://api.github.com/repos/json-c/json-c/issues/302)
+[fix doc in tokener header file](https://api.github.com/repos/json-c/json-c/issues/303)
+[(.text+0x72846): undefined reference to `is_error'](https://api.github.com/repos/json-c/json-c/issues/304)
+[Fix compilation without C-99 option](https://api.github.com/repos/json-c/json-c/issues/305)
+[./configure: line 12748 -error=deprecated-declarations](https://api.github.com/repos/json-c/json-c/issues/306)
+[Memory leak in json_tokener_parse](https://api.github.com/repos/json-c/json-c/issues/307)
+[AM_PROG_LIBTOOL not found on Linux](https://api.github.com/repos/json-c/json-c/issues/308)
+[GCC 7 reports various -Wimplicit-fallthrough= errors](https://api.github.com/repos/json-c/json-c/issues/309)
+[Add FALLTHRU comment to handle GCC7 warnings.](https://api.github.com/repos/json-c/json-c/issues/310)
+[Fix error C3688 when compiling on Visual Studio 2015](https://api.github.com/repos/json-c/json-c/issues/311)
+[Fix CMake Build process improved for MinGW and MSYS2](https://api.github.com/repos/json-c/json-c/issues/312)
+[VERBOSE=1 make check; tests/test_util_file.test.c and tests/test_util_file.expected out of sync](https://api.github.com/repos/json-c/json-c/issues/313)
+[Passing -1 to json_tokener_parse_ex is possibly unsafe](https://api.github.com/repos/json-c/json-c/issues/315)
+[Memory Returned by json_object_to_json_string not freed](https://api.github.com/repos/json-c/json-c/issues/316)
+[json_object_get_string gives segmentation error](https://api.github.com/repos/json-c/json-c/issues/317)
+[PVS-Studio static analyzer analyze results](https://api.github.com/repos/json-c/json-c/issues/318)
+[Windows: Fix dynamic library build with Visual Studio](https://api.github.com/repos/json-c/json-c/issues/319)
+[Can't compile in Mac OS X El Capitan](https://api.github.com/repos/json-c/json-c/issues/320)
+[build,cmake: fix vasprintf implicit definition and generate both static & shared libs](https://api.github.com/repos/json-c/json-c/issues/321)
+[can not link with libjson-c.a](https://api.github.com/repos/json-c/json-c/issues/322)
+[implicit fallthrough detected by gcc 7.1](https://api.github.com/repos/json-c/json-c/issues/323)
+[JsonPath like function?](https://api.github.com/repos/json-c/json-c/issues/324)
+[Fix stack buffer overflow in json_object_double_to_json_string_format()](https://api.github.com/repos/json-c/json-c/issues/325)
+[why json-c so hard to compile](https://api.github.com/repos/json-c/json-c/issues/327)
+[json_object: implement json_object_deep_copy() function](https://api.github.com/repos/json-c/json-c/issues/328)
+[build,cmake: build,cmake: rename libjson-c-static.a to libjson-c.a](https://api.github.com/repos/json-c/json-c/issues/329)
+[tests: symlink basic tests to a single file that has the common code](https://api.github.com/repos/json-c/json-c/issues/330)
+[Safe use of snprintf() / vsnprintf() for Visual studio, and thread-safety fix](https://api.github.com/repos/json-c/json-c/issues/331)
+[Valgrind: invalid read after json_object_array_del_idx.](https://api.github.com/repos/json-c/json-c/issues/332)
+[Replace obsolete AM_PROG_LIBTOOL](https://api.github.com/repos/json-c/json-c/issues/333)
+[README.md: show build status tag from travis-ci.org](https://api.github.com/repos/json-c/json-c/issues/335)
+[tests: fix tests in travis-ci.org](https://api.github.com/repos/json-c/json-c/issues/336)
+[Synchronize "potentially racy" random seed in lh_char_hash()](https://api.github.com/repos/json-c/json-c/issues/337)
+[implement json_object_int_inc(json_object *, int64_t)](https://api.github.com/repos/json-c/json-c/issues/338)
+[Json schema validation](https://api.github.com/repos/json-c/json-c/issues/339)
+[strerror_override: add extern "C" and JSON_EXPORT specifiers for Visual C++ compilers](https://api.github.com/repos/json-c/json-c/issues/340)
+[character "/" parse as "\/"](https://api.github.com/repos/json-c/json-c/issues/341)
+[ No such file or directory "/usr/include/json.h"](https://api.github.com/repos/json-c/json-c/issues/342)
+[Can't parse json](https://api.github.com/repos/json-c/json-c/issues/343)
+[Fix Mingw build](https://api.github.com/repos/json-c/json-c/issues/344)
+[Fix make dist and make distcheck](https://api.github.com/repos/json-c/json-c/issues/345)
+[Clamp double to int32 when narrowing in json_object_get_int.](https://api.github.com/repos/json-c/json-c/issues/346)
+[MSVC linker error json_c_strerror](https://api.github.com/repos/json-c/json-c/issues/347)
+[why](https://api.github.com/repos/json-c/json-c/issues/348)
+[`missing` is missing?](https://api.github.com/repos/json-c/json-c/issues/349)
+[stderror-override and disable-shared](https://api.github.com/repos/json-c/json-c/issues/350)
+[SIZE_T_MAX redefined from limits.h](https://api.github.com/repos/json-c/json-c/issues/351)
+[`INSTALL` overrides an automake script.](https://api.github.com/repos/json-c/json-c/issues/352)
+[Documentation issues](https://api.github.com/repos/json-c/json-c/issues/353)
+[Fixes #351 #352 #353 ](https://api.github.com/repos/json-c/json-c/issues/354)
+[1.make it can been compiled with Visual Studio 2010 by modify the CMakeList.txt and others](https://api.github.com/repos/json-c/json-c/issues/355)
+[VS2008 test  test_util_file.cpp err!](https://api.github.com/repos/json-c/json-c/issues/356)
+[__json_c_strerror incompatibility with link-time optimization](https://api.github.com/repos/json-c/json-c/issues/357)
+[make issue](https://api.github.com/repos/json-c/json-c/issues/358)
+[update CMakeLists.txt for compile with visual studio at least 2010](https://api.github.com/repos/json-c/json-c/issues/359)
+[Use strtoll() to parse ints](https://api.github.com/repos/json-c/json-c/issues/360)
+[Fix double to int cast overflow in json_object_get_int64.](https://api.github.com/repos/json-c/json-c/issues/361)
+[CMake Package Config](https://api.github.com/repos/json-c/json-c/issues/362)
+[Issue #338, add json_object_add_int functions](https://api.github.com/repos/json-c/json-c/issues/363)
+[Cmake is Errir](https://api.github.com/repos/json-c/json-c/issues/364)
+[added fallthrough for gcc7](https://api.github.com/repos/json-c/json-c/issues/365)
+[how to check  the json string,crash!](https://api.github.com/repos/json-c/json-c/issues/366)
+[Is json-c support "redirect" semantic?](https://api.github.com/repos/json-c/json-c/issues/367)
+[Add examples](https://api.github.com/repos/json-c/json-c/issues/368)
+[How to build json-c library for android?](https://api.github.com/repos/json-c/json-c/issues/369)
+[Compiling using clang-cl](https://api.github.com/repos/json-c/json-c/issues/370)
+[Invalid parsing for Infinity with json-c 0.12](https://api.github.com/repos/json-c/json-c/issues/371)
+[Json-c 0.12: Fixed Infinity bug](https://api.github.com/repos/json-c/json-c/issues/372)
+[build: fix build on appveyor CI](https://api.github.com/repos/json-c/json-c/issues/373)
+[Undefined symbols for architecture x86_64:](https://api.github.com/repos/json-c/json-c/issues/374)
+[what would happened when json_object_object_add add the same key](https://api.github.com/repos/json-c/json-c/issues/375)
+[Eclipse error ](https://api.github.com/repos/json-c/json-c/issues/376)
+[on gcc 7.2.0 on my linux distribution with json-c  2013-04-02 source](https://api.github.com/repos/json-c/json-c/issues/377)
+[ Eclipse: library (libjson-c) not found, but configured](https://api.github.com/repos/json-c/json-c/issues/378)
+[error: this statement may fall through \[-Werror=implicit-fallthrough=\]](https://api.github.com/repos/json-c/json-c/issues/379)
+[Build on Windows](https://api.github.com/repos/json-c/json-c/issues/380)
+[Fix makedist](https://api.github.com/repos/json-c/json-c/issues/381)
+[Memory leak for json_tokener_parse_ex for version 0.12.1](https://api.github.com/repos/json-c/json-c/issues/382)
+[Fix a compiler warning.](https://api.github.com/repos/json-c/json-c/issues/383)
+[Fix a VS 2015 compiler warnings.](https://api.github.com/repos/json-c/json-c/issues/384)
+
diff --git a/third_party/json-c/json.h b/third_party/json-c/json.h
new file mode 100644
index 0000000000..fc2daddee2
--- /dev/null
+++ b/third_party/json-c/json.h
@@ -0,0 +1,38 @@
+/*
+ * $Id: json.h,v 1.6 2006/01/26 02:16:28 mclark Exp $
+ *
+ * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ * Copyright (c) 2009 Hewlett-Packard Development Company, L.P.
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+/**
+ * @file
+ * @brief A convenience header that may be included instead of other individual ones.
+ */
+#ifndef _json_h_
+#define _json_h_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "debug.h"
+#include "linkhash.h"
+#include "arraylist.h"
+#include "json_util.h"
+#include "json_object.h"
+#include "json_pointer.h"
+#include "json_tokener.h"
+#include "json_object_iterator.h"
+#include "json_c_version.h"
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/third_party/json-c/json_c_version.c b/third_party/json-c/json_c_version.c
new file mode 100644
index 0000000000..13eb188554
--- /dev/null
+++ b/third_party/json-c/json_c_version.c
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2012 Eric Haszlakiewicz
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ */
+#include "config.h"
+
+#include "json_c_version.h"
+
+const char *json_c_version(void)
+{
+	return JSON_C_VERSION;
+}
+
+int json_c_version_num(void)
+{
+	return JSON_C_VERSION_NUM;
+}
+
diff --git a/third_party/json-c/json_c_version.h b/third_party/json-c/json_c_version.h
new file mode 100644
index 0000000000..98838be946
--- /dev/null
+++ b/third_party/json-c/json_c_version.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2012,2017 Eric Haszlakiewicz
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ */
+
+/**
+ * @file
+ * @brief Methods for retrieving the json-c version.
+ */
+#ifndef _json_c_version_h_
+#define _json_c_version_h_
+
+#define JSON_C_MAJOR_VERSION 0
+#define JSON_C_MINOR_VERSION 13
+#define JSON_C_MICRO_VERSION 01
+#define JSON_C_VERSION_NUM ((JSON_C_MAJOR_VERSION << 16) | \
+                            (JSON_C_MINOR_VERSION << 8) | \
+                            JSON_C_MICRO_VERSION)
+#define JSON_C_VERSION "0.13.1"
+
+/**
+ * @see JSON_C_VERSION
+ * @return the version of the json-c library as a string
+ */
+const char *json_c_version(void); /* Returns JSON_C_VERSION */
+
+/**
+ * The json-c version encoded into an int, with the low order 8 bits
+ * being the micro version, the next higher 8 bits being the minor version
+ * and the next higher 8 bits being the major version.
+ * For example, 7.12.99 would be 0x00070B63.
+ *
+ * @see JSON_C_VERSION_NUM
+ * @return the version of the json-c library as an int
+ */
+int json_c_version_num(void);     /* Returns JSON_C_VERSION_NUM */
+
+#endif
diff --git a/third_party/json-c/json_config.h.in b/third_party/json-c/json_config.h.in
new file mode 100644
index 0000000000..7888e02170
--- /dev/null
+++ b/third_party/json-c/json_config.h.in
@@ -0,0 +1,3 @@
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#undef JSON_C_HAVE_INTTYPES_H
diff --git a/third_party/json-c/json_config.h.win32 b/third_party/json-c/json_config.h.win32
new file mode 100644
index 0000000000..9c542a4086
--- /dev/null
+++ b/third_party/json-c/json_config.h.win32
@@ -0,0 +1,5 @@
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#if defined(_MSC_VER) && _MSC_VER >= 1800
+#define JSON_C_HAVE_INTTYPES_H 1
+#endif
diff --git a/third_party/json-c/json_inttypes.h b/third_party/json-c/json_inttypes.h
new file mode 100644
index 0000000000..3854913fc5
--- /dev/null
+++ b/third_party/json-c/json_inttypes.h
@@ -0,0 +1,23 @@
+
+/**
+ * @file
+ * @brief Do not use, json-c internal, may be changed or removed at any time.
+ */
+#ifndef _json_inttypes_h_
+#define _json_inttypes_h_
+
+#include "json_config.h"
+
+#ifdef JSON_C_HAVE_INTTYPES_H
+/* inttypes.h includes stdint.h */
+#include <inttypes.h>
+
+#else
+#include <stdint.h>
+
+#define PRId64 "I64d"
+#define SCNd64 "I64d"
+
+#endif
+
+#endif
diff --git a/third_party/json-c/json_object.c b/third_party/json-c/json_object.c
new file mode 100644
index 0000000000..458163c20d
--- /dev/null
+++ b/third_party/json-c/json_object.c
@@ -0,0 +1,1493 @@
+/*
+ * $Id: json_object.c,v 1.17 2006/07/25 03:24:50 mclark Exp $
+ *
+ * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ * Copyright (c) 2009 Hewlett-Packard Development Company, L.P.
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+#include "config.h"
+
+#include "strerror_override.h"
+
+#include <assert.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include <math.h>
+
+#include "debug.h"
+#include "printbuf.h"
+#include "linkhash.h"
+#include "arraylist.h"
+#include "json_inttypes.h"
+#include "json_object.h"
+#include "json_object_private.h"
+#include "json_util.h"
+#include "math_compat.h"
+#include "strdup_compat.h"
+#include "snprintf_compat.h"
+
+#if SIZEOF_LONG_LONG != SIZEOF_INT64_T
+#error "The long long type isn't 64-bits"
+#endif
+
+// Don't define this.  It's not thread-safe.
+/* #define REFCOUNT_DEBUG 1 */
+
+const char *json_number_chars = "0123456789.+-eE";
+const char *json_hex_chars = "0123456789abcdefABCDEF";
+
+static void json_object_generic_delete(struct json_object* jso);
+static struct json_object* json_object_new(enum json_type o_type);
+
+static json_object_to_json_string_fn json_object_object_to_json_string;
+static json_object_to_json_string_fn json_object_boolean_to_json_string;
+static json_object_to_json_string_fn json_object_double_to_json_string_default;
+static json_object_to_json_string_fn json_object_int_to_json_string;
+static json_object_to_json_string_fn json_object_string_to_json_string;
+static json_object_to_json_string_fn json_object_array_to_json_string;
+
+
+/* ref count debugging */
+
+#ifdef REFCOUNT_DEBUG
+
+static struct lh_table *json_object_table;
+
+static void json_object_init(void) __attribute__ ((constructor));
+static void json_object_init(void) {
+	MC_DEBUG("json_object_init: creating object table\n");
+	json_object_table = lh_kptr_table_new(128, NULL);
+}
+
+static void json_object_fini(void) __attribute__ ((destructor));
+static void json_object_fini(void)
+{
+	struct lh_entry *ent;
+	if (MC_GET_DEBUG())
+	{
+		if (json_object_table->count)
+		{
+			MC_DEBUG("json_object_fini: %d referenced objects at exit\n",
+			   json_object_table->count);
+			lh_foreach(json_object_table, ent)
+			{
+				struct json_object* obj =
+				  (struct json_object*) lh_entry_v(ent);
+				MC_DEBUG("\t%s:%p\n",
+					 json_type_to_name(obj->o_type), obj);
+			}
+		}
+	}
+	MC_DEBUG("json_object_fini: freeing object table\n");
+	lh_table_free(json_object_table);
+}
+#endif /* REFCOUNT_DEBUG */
+
+
+/* helper for accessing the optimized string data component in json_object
+ */
+static const char *
+get_string_component(const struct json_object *jso)
+{
+	return (jso->o.c_string.len < LEN_DIRECT_STRING_DATA) ?
+		   jso->o.c_string.str.data : jso->o.c_string.str.ptr;
+}
+
+/* string escaping */
+
+static int json_escape_str(struct printbuf *pb, const char *str, int len, int flags)
+{
+	int pos = 0, start_offset = 0;
+	unsigned char c;
+	while (len--)
+	{
+		c = str[pos];
+		switch(c)
+		{
+		case '\b':
+		case '\n':
+		case '\r':
+		case '\t':
+		case '\f':
+		case '"':
+		case '\\':
+		case '/':
+			if((flags & JSON_C_TO_STRING_NOSLASHESCAPE) && c == '/')
+			{
+				pos++;
+				break;
+			}
+
+			if(pos - start_offset > 0)
+				printbuf_memappend(pb, str + start_offset, pos - start_offset);
+
+			if(c == '\b') printbuf_memappend(pb, "\\b", 2);
+			else if(c == '\n') printbuf_memappend(pb, "\\n", 2);
+			else if(c == '\r') printbuf_memappend(pb, "\\r", 2);
+			else if(c == '\t') printbuf_memappend(pb, "\\t", 2);
+			else if(c == '\f') printbuf_memappend(pb, "\\f", 2);
+			else if(c == '"') printbuf_memappend(pb, "\\\"", 2);
+			else if(c == '\\') printbuf_memappend(pb, "\\\\", 2);
+			else if(c == '/') printbuf_memappend(pb, "\\/", 2);
+
+			start_offset = ++pos;
+			break;
+		default:
+			if(c < ' ')
+			{
+				char sbuf[7];
+				if(pos - start_offset > 0)
+					printbuf_memappend(pb,
+							   str + start_offset,
+							   pos - start_offset);
+				snprintf(sbuf, sizeof(sbuf),
+					 "\\u00%c%c",
+					 json_hex_chars[c >> 4],
+					 json_hex_chars[c & 0xf]);
+				printbuf_memappend_fast(pb, sbuf, (int) sizeof(sbuf) - 1);
+				start_offset = ++pos;
+			} else
+				pos++;
+		}
+	}
+	if (pos - start_offset > 0)
+		printbuf_memappend(pb, str + start_offset, pos - start_offset);
+	return 0;
+}
+
+
+/* reference counting */
+
+extern struct json_object* json_object_get(struct json_object *jso)
+{
+	if (!jso) return jso;
+
+#if defined(HAVE_ATOMIC_BUILTINS) && defined(ENABLE_THREADING)
+	__sync_add_and_fetch(&jso->_ref_count, 1);
+#else
+	++jso->_ref_count;
+#endif        
+
+	return jso;
+}
+
+int json_object_put(struct json_object *jso)
+{
+	if(!jso) return 0;
+
+	/* Avoid invalid free and crash explicitly instead of (silently)
+	 * segfaulting.
+	 */
+	assert(jso->_ref_count > 0);
+
+#if defined(HAVE_ATOMIC_BUILTINS) && defined(ENABLE_THREADING)
+	/* Note: this only allow the refcount to remain correct
+	 * when multiple threads are adjusting it.  It is still an error 
+	 * for a thread to decrement the refcount if it doesn't "own" it,
+	 * as that can result in the thread that loses the race to 0
+	 * operating on an already-freed object.
+	 */
+	if (__sync_sub_and_fetch(&jso->_ref_count, 1) > 0) return 0;
+#else
+	if (--jso->_ref_count > 0) return 0;
+#endif
+
+	if (jso->_user_delete)
+		jso->_user_delete(jso, jso->_userdata);
+	jso->_delete(jso);
+	return 1;
+}
+
+
+/* generic object construction and destruction parts */
+
+static void json_object_generic_delete(struct json_object* jso)
+{
+#ifdef REFCOUNT_DEBUG
+	MC_DEBUG("json_object_delete_%s: %p\n",
+	   json_type_to_name(jso->o_type), jso);
+	lh_table_delete(json_object_table, jso);
+#endif /* REFCOUNT_DEBUG */
+	printbuf_free(jso->_pb);
+	free(jso);
+}
+
+static struct json_object* json_object_new(enum json_type o_type)
+{
+	struct json_object *jso;
+
+	jso = (struct json_object*)calloc(sizeof(struct json_object), 1);
+	if (!jso)
+		return NULL;
+	jso->o_type = o_type;
+	jso->_ref_count = 1;
+	jso->_delete = &json_object_generic_delete;
+#ifdef REFCOUNT_DEBUG
+	lh_table_insert(json_object_table, jso, jso);
+	MC_DEBUG("json_object_new_%s: %p\n", json_type_to_name(jso->o_type), jso);
+#endif /* REFCOUNT_DEBUG */
+	return jso;
+}
+
+
+/* type checking functions */
+
+int json_object_is_type(const struct json_object *jso, enum json_type type)
+{
+	if (!jso)
+		return (type == json_type_null);
+	return (jso->o_type == type);
+}
+
+enum json_type json_object_get_type(const struct json_object *jso)
+{
+	if (!jso)
+		return json_type_null;
+	return jso->o_type;
+}
+
+void* json_object_get_userdata(json_object *jso) {
+	return jso ? jso->_userdata : NULL;
+}
+
+void json_object_set_userdata(json_object *jso, void *userdata,
+			      json_object_delete_fn *user_delete)
+{
+	// Can't return failure, so abort if we can't perform the operation.
+	assert(jso != NULL);
+
+	// First, clean up any previously existing user info
+	if (jso->_user_delete)
+		jso->_user_delete(jso, jso->_userdata);
+
+	jso->_userdata = userdata;
+	jso->_user_delete = user_delete;
+}
+
+/* set a custom conversion to string */
+
+void json_object_set_serializer(json_object *jso,
+	json_object_to_json_string_fn *to_string_func,
+	void *userdata,
+	json_object_delete_fn *user_delete)
+{
+	json_object_set_userdata(jso, userdata, user_delete);
+
+	if (to_string_func == NULL)
+	{
+		// Reset to the standard serialization function
+		switch(jso->o_type)
+		{
+		case json_type_null:
+			jso->_to_json_string = NULL;
+			break;
+		case json_type_boolean:
+			jso->_to_json_string = &json_object_boolean_to_json_string;
+			break;
+		case json_type_double:
+			jso->_to_json_string = &json_object_double_to_json_string_default;
+			break;
+		case json_type_int:
+			jso->_to_json_string = &json_object_int_to_json_string;
+			break;
+		case json_type_object:
+			jso->_to_json_string = &json_object_object_to_json_string;
+			break;
+		case json_type_array:
+			jso->_to_json_string = &json_object_array_to_json_string;
+			break;
+		case json_type_string:
+			jso->_to_json_string = &json_object_string_to_json_string;
+			break;
+		}
+		return;
+	}
+
+	jso->_to_json_string = to_string_func;
+}
+
+
+/* extended conversion to string */
+
+const char* json_object_to_json_string_length(struct json_object *jso, int flags, size_t *length)
+{
+	const char *r = NULL;
+	size_t s = 0;
+
+	if (!jso)
+	{
+		s = 4;
+		r = "null";
+	}
+	else if ((jso->_pb) || (jso->_pb = printbuf_new()))
+	{
+		printbuf_reset(jso->_pb);
+
+		if(jso->_to_json_string(jso, jso->_pb, 0, flags) >= 0)
+		{
+			s = (size_t)jso->_pb->bpos;
+			r = jso->_pb->buf;
+		}
+	}
+
+	if (length)
+		*length = s;
+	return r;
+}
+
+const char* json_object_to_json_string_ext(struct json_object *jso, int flags)
+{
+	return json_object_to_json_string_length(jso, flags, NULL);
+}
+
+/* backwards-compatible conversion to string */
+
+const char* json_object_to_json_string(struct json_object *jso)
+{
+	return json_object_to_json_string_ext(jso, JSON_C_TO_STRING_SPACED);
+}
+
+static void indent(struct printbuf *pb, int level, int flags)
+{
+	if (flags & JSON_C_TO_STRING_PRETTY)
+	{
+		if (flags & JSON_C_TO_STRING_PRETTY_TAB)
+		{
+			printbuf_memset(pb, -1, '\t', level);
+		}
+		else
+		{
+			printbuf_memset(pb, -1, ' ', level * 2);
+		}
+	}
+}
+
+/* json_object_object */
+
+static int json_object_object_to_json_string(struct json_object* jso,
+					     struct printbuf *pb,
+					     int level,
+					     int flags)
+{
+	int had_children = 0;
+	struct json_object_iter iter;
+
+	printbuf_strappend(pb, "{" /*}*/);
+	if (flags & JSON_C_TO_STRING_PRETTY)
+		printbuf_strappend(pb, "\n");
+	json_object_object_foreachC(jso, iter)
+	{
+		if (had_children)
+		{
+			printbuf_strappend(pb, ",");
+			if (flags & JSON_C_TO_STRING_PRETTY)
+				printbuf_strappend(pb, "\n");
+		}
+		had_children = 1;
+		if (flags & JSON_C_TO_STRING_SPACED)
+			printbuf_strappend(pb, " ");
+		indent(pb, level+1, flags);
+		printbuf_strappend(pb, "\"");
+		json_escape_str(pb, iter.key, strlen(iter.key), flags);
+		if (flags & JSON_C_TO_STRING_SPACED)
+			printbuf_strappend(pb, "\": ");
+		else
+			printbuf_strappend(pb, "\":");
+		if(iter.val == NULL)
+			printbuf_strappend(pb, "null");
+		else
+			if (iter.val->_to_json_string(iter.val, pb, level+1,flags) < 0)
+				return -1;
+	}
+	if (flags & JSON_C_TO_STRING_PRETTY)
+	{
+		if (had_children)
+			printbuf_strappend(pb, "\n");
+		indent(pb,level,flags);
+	}
+	if (flags & JSON_C_TO_STRING_SPACED)
+		return printbuf_strappend(pb, /*{*/ " }");
+	else
+		return printbuf_strappend(pb, /*{*/ "}");
+}
+
+
+static void json_object_lh_entry_free(struct lh_entry *ent)
+{
+	if (!ent->k_is_constant)
+		free(lh_entry_k(ent));
+	json_object_put((struct json_object*)lh_entry_v(ent));
+}
+
+static void json_object_object_delete(struct json_object* jso)
+{
+	lh_table_free(jso->o.c_object);
+	json_object_generic_delete(jso);
+}
+
+struct json_object* json_object_new_object(void)
+{
+	struct json_object *jso = json_object_new(json_type_object);
+	if (!jso)
+		return NULL;
+	jso->_delete = &json_object_object_delete;
+	jso->_to_json_string = &json_object_object_to_json_string;
+	jso->o.c_object = lh_kchar_table_new(JSON_OBJECT_DEF_HASH_ENTRIES,
+					     &json_object_lh_entry_free);
+	if (!jso->o.c_object)
+	{
+		json_object_generic_delete(jso);
+		errno = ENOMEM;
+		return NULL;
+	}
+	return jso;
+}
+
+struct lh_table* json_object_get_object(const struct json_object *jso)
+{
+	if (!jso)
+		return NULL;
+	switch(jso->o_type)
+	{
+	case json_type_object:
+		return jso->o.c_object;
+	default:
+		return NULL;
+	}
+}
+
+int json_object_object_add_ex(struct json_object* jso,
+	const char *const key,
+	struct json_object *const val,
+	const unsigned opts)
+{
+	struct json_object *existing_value = NULL;
+	struct lh_entry *existing_entry;
+	unsigned long hash;
+
+	assert(json_object_get_type(jso) == json_type_object);
+
+	// We lookup the entry and replace the value, rather than just deleting
+	// and re-adding it, so the existing key remains valid.
+	hash = lh_get_hash(jso->o.c_object, (const void *)key);
+	existing_entry = (opts & JSON_C_OBJECT_ADD_KEY_IS_NEW) ? NULL : 
+			      lh_table_lookup_entry_w_hash(jso->o.c_object,
+							   (const void *)key, hash);
+
+	// The caller must avoid creating loops in the object tree, but do a
+	// quick check anyway to make sure we're not creating a trivial loop.
+	if (jso == val)
+		return -1;
+
+	if (!existing_entry)
+	{
+		const void *const k = (opts & JSON_C_OBJECT_KEY_IS_CONSTANT) ?
+					(const void *)key : strdup(key);
+		if (k == NULL)
+			return -1;
+		return lh_table_insert_w_hash(jso->o.c_object, k, val, hash, opts);
+	}
+	existing_value = (json_object *) lh_entry_v(existing_entry);
+	if (existing_value)
+		json_object_put(existing_value);
+	existing_entry->v = val;
+	return 0;
+}
+
+int json_object_object_add(struct json_object* jso, const char *key,
+                           struct json_object *val)
+{
+	return json_object_object_add_ex(jso, key, val, 0);
+}
+
+
+int json_object_object_length(const struct json_object *jso)
+{
+	assert(json_object_get_type(jso) == json_type_object);
+	return lh_table_length(jso->o.c_object);
+}
+
+size_t json_c_object_sizeof(void)
+{
+	return sizeof(struct json_object);
+}
+
+struct json_object* json_object_object_get(const struct json_object* jso,
+					   const char *key)
+{
+	struct json_object *result = NULL;
+	json_object_object_get_ex(jso, key, &result);
+	return result;
+}
+
+json_bool json_object_object_get_ex(const struct json_object* jso, const char *key,
+				    struct json_object **value)
+{
+	if (value != NULL)
+		*value = NULL;
+
+	if (NULL == jso)
+		return FALSE;
+
+	switch(jso->o_type)
+	{
+	case json_type_object:
+		return lh_table_lookup_ex(jso->o.c_object, (const void *) key,
+					  (void**) value);
+	default:
+		if (value != NULL)
+			*value = NULL;
+		return FALSE;
+	}
+}
+
+void json_object_object_del(struct json_object* jso, const char *key)
+{
+	assert(json_object_get_type(jso) == json_type_object);
+	lh_table_delete(jso->o.c_object, key);
+}
+
+
+/* json_object_boolean */
+
+static int json_object_boolean_to_json_string(struct json_object* jso,
+					      struct printbuf *pb,
+					      int level,
+					      int flags)
+{
+	if (jso->o.c_boolean)
+		return printbuf_strappend(pb, "true");
+	return printbuf_strappend(pb, "false");
+}
+
+struct json_object* json_object_new_boolean(json_bool b)
+{
+	struct json_object *jso = json_object_new(json_type_boolean);
+	if (!jso)
+		return NULL;
+	jso->_to_json_string = &json_object_boolean_to_json_string;
+	jso->o.c_boolean = b;
+	return jso;
+}
+
+json_bool json_object_get_boolean(const struct json_object *jso)
+{
+	if (!jso)
+		return FALSE;
+	switch(jso->o_type)
+	{
+	case json_type_boolean:
+		return jso->o.c_boolean;
+	case json_type_int:
+		return (jso->o.c_int64 != 0);
+	case json_type_double:
+		return (jso->o.c_double != 0);
+	case json_type_string:
+		return (jso->o.c_string.len != 0);
+	default:
+		return FALSE;
+	}
+}
+
+int json_object_set_boolean(struct json_object *jso,json_bool new_value){
+	if (!jso || jso->o_type!=json_type_boolean)
+		return 0;
+	jso->o.c_boolean=new_value;
+	return 1;
+}
+
+
+/* json_object_int */
+
+static int json_object_int_to_json_string(struct json_object* jso,
+					  struct printbuf *pb,
+					  int level,
+					  int flags)
+{
+	/* room for 19 digits, the sign char, and a null term */
+	char sbuf[21];
+	snprintf(sbuf, sizeof(sbuf), "%" PRId64, jso->o.c_int64);
+	return printbuf_memappend (pb, sbuf, strlen(sbuf));
+}
+
+struct json_object* json_object_new_int(int32_t i)
+{
+	struct json_object *jso = json_object_new(json_type_int);
+	if (!jso)
+		return NULL;
+	jso->_to_json_string = &json_object_int_to_json_string;
+	jso->o.c_int64 = i;
+	return jso;
+}
+
+int32_t json_object_get_int(const struct json_object *jso)
+{
+  int64_t cint64;
+  enum json_type o_type;
+
+  if(!jso) return 0;
+
+  o_type = jso->o_type;
+  cint64 = jso->o.c_int64;
+
+  if (o_type == json_type_string)
+  {
+	/*
+	 * Parse strings into 64-bit numbers, then use the
+	 * 64-to-32-bit number handling below.
+	 */
+	if (json_parse_int64(get_string_component(jso), &cint64) != 0)
+		return 0; /* whoops, it didn't work. */
+	o_type = json_type_int;
+  }
+
+  switch(o_type) {
+  case json_type_int:
+	/* Make sure we return the correct values for out of range numbers. */
+	if (cint64 <= INT32_MIN)
+		return INT32_MIN;
+	if (cint64 >= INT32_MAX)
+		return INT32_MAX;
+	return (int32_t) cint64;
+  case json_type_double:
+    if (jso->o.c_double <= INT32_MIN)
+      return INT32_MIN;
+    if (jso->o.c_double >= INT32_MAX)
+      return INT32_MAX;
+    return (int32_t)jso->o.c_double;
+  case json_type_boolean:
+    return jso->o.c_boolean;
+  default:
+    return 0;
+  }
+}
+
+int json_object_set_int(struct json_object *jso,int new_value){
+	if (!jso || jso->o_type!=json_type_int)
+		return 0;
+	jso->o.c_int64=new_value;
+	return 1;
+}
+
+struct json_object* json_object_new_int64(int64_t i)
+{
+	struct json_object *jso = json_object_new(json_type_int);
+	if (!jso)
+		return NULL;
+	jso->_to_json_string = &json_object_int_to_json_string;
+	jso->o.c_int64 = i;
+	return jso;
+}
+
+int64_t json_object_get_int64(const struct json_object *jso)
+{
+	int64_t cint;
+
+	if (!jso)
+		return 0;
+	switch(jso->o_type)
+	{
+	case json_type_int:
+		return jso->o.c_int64;
+	case json_type_double:
+		if (jso->o.c_double >= INT64_MAX)
+			return INT64_MAX;
+		if (jso->o.c_double <= INT64_MIN)
+			return INT64_MIN;
+		return (int64_t)jso->o.c_double;
+	case json_type_boolean:
+		return jso->o.c_boolean;
+	case json_type_string:
+		if (json_parse_int64(get_string_component(jso), &cint) == 0)
+			return cint;
+		/* FALLTHRU */
+	default:
+		return 0;
+	}
+}
+
+int json_object_set_int64(struct json_object *jso,int64_t new_value){
+	if (!jso || jso->o_type!=json_type_int)
+		return 0;
+	jso->o.c_int64=new_value;
+	return 1;
+}
+
+int json_object_int_inc(struct json_object *jso, int64_t val) {
+	if (!jso || jso->o_type != json_type_int)
+		return 0;
+	if (val > 0 && jso->o.c_int64 > INT64_MAX - val) {
+		jso->o.c_int64 = INT64_MAX;
+	} else if (val < 0 && jso->o.c_int64 < INT64_MIN - val) {
+		jso->o.c_int64 = INT64_MIN;
+	} else {
+		jso->o.c_int64 += val;
+	}
+	return 1;
+}
+
+/* json_object_double */
+
+#if defined(HAVE___THREAD)
+// i.e. __thread or __declspec(thread)
+static SPEC___THREAD char *tls_serialization_float_format = NULL;
+#endif
+static char *global_serialization_float_format = NULL;
+
+int json_c_set_serialization_double_format(const char *double_format, int global_or_thread)
+{
+	if (global_or_thread == JSON_C_OPTION_GLOBAL)
+	{
+#if defined(HAVE___THREAD)
+		if (tls_serialization_float_format)
+		{
+			free(tls_serialization_float_format);
+			tls_serialization_float_format = NULL;
+		}
+#endif
+		if (global_serialization_float_format)
+			free(global_serialization_float_format);
+		global_serialization_float_format = double_format ? strdup(double_format) : NULL;
+	}
+	else if (global_or_thread == JSON_C_OPTION_THREAD)
+	{
+#if defined(HAVE___THREAD)
+		if (tls_serialization_float_format)
+		{
+			free(tls_serialization_float_format);
+			tls_serialization_float_format = NULL;
+		}
+		tls_serialization_float_format = double_format ? strdup(double_format) : NULL;
+#else
+		_json_c_set_last_err("json_c_set_option: not compiled with __thread support\n");
+		return -1;
+#endif
+	}
+	else
+	{
+		_json_c_set_last_err("json_c_set_option: invalid global_or_thread value: %d\n", global_or_thread);
+		return -1;
+	}
+	return 0;
+}
+
+
+static int json_object_double_to_json_string_format(struct json_object* jso,
+						    struct printbuf *pb,
+						    int level,
+						    int flags,
+						    const char *format)
+{
+	char buf[128], *p, *q;
+	int size;
+	/* Although JSON RFC does not support
+	NaN or Infinity as numeric values
+	ECMA 262 section 9.8.1 defines
+	how to handle these cases as strings */
+	if (isnan(jso->o.c_double))
+	{
+		size = snprintf(buf, sizeof(buf), "NaN");
+	}
+	else if (isinf(jso->o.c_double))
+	{
+		if(jso->o.c_double > 0)
+			size = snprintf(buf, sizeof(buf), "Infinity");
+		else
+			size = snprintf(buf, sizeof(buf), "-Infinity");
+	}
+	else
+	{
+		const char *std_format = "%.17g";
+		int format_drops_decimals = 0;
+
+		if (!format)
+		{
+#if defined(HAVE___THREAD)
+			if (tls_serialization_float_format)
+				format = tls_serialization_float_format;
+			else
+#endif
+			if (global_serialization_float_format)
+				format = global_serialization_float_format;
+			else
+				format = std_format;
+		}
+		size = snprintf(buf, sizeof(buf), format, jso->o.c_double);
+
+		if (size < 0)
+			return -1;
+
+		p = strchr(buf, ',');
+		if (p)
+			*p = '.';
+		else
+			p = strchr(buf, '.');
+
+		if (format == std_format || strstr(format, ".0f") == NULL)
+			format_drops_decimals = 1;
+
+		if (size < (int)sizeof(buf) - 2 &&
+		    isdigit((int)buf[0]) && /* Looks like *some* kind of number */
+			!p && /* Has no decimal point */
+		    strchr(buf, 'e') == NULL && /* Not scientific notation */
+			format_drops_decimals)
+		{
+			// Ensure it looks like a float, even if snprintf didn't,
+			//  unless a custom format is set to omit the decimal.
+			strcat(buf, ".0");
+			size += 2;
+		}
+		if (p && (flags & JSON_C_TO_STRING_NOZERO))
+		{
+			/* last useful digit, always keep 1 zero */
+			p++;
+			for (q=p ; *q ; q++) {
+				if (*q!='0') p=q;
+			}
+			/* drop trailing zeroes */
+			*(++p) = 0;
+			size = p-buf;
+		}
+	}
+	// although unlikely, snprintf can fail
+	if (size < 0)
+		return -1;
+
+	if (size >= (int)sizeof(buf))
+		// The standard formats are guaranteed not to overrun the buffer,
+		// but if a custom one happens to do so, just silently truncate.
+		size = sizeof(buf) - 1;
+	printbuf_memappend(pb, buf, size);
+	return size;
+}
+
+static int json_object_double_to_json_string_default(struct json_object* jso,
+						     struct printbuf *pb,
+						     int level,
+						     int flags)
+{
+	return json_object_double_to_json_string_format(jso, pb, level, flags,
+							NULL);
+}
+
+int json_object_double_to_json_string(struct json_object* jso,
+				      struct printbuf *pb,
+				      int level,
+				      int flags)
+{
+	return json_object_double_to_json_string_format(jso, pb, level, flags,
+							(const char *)jso->_userdata);
+}
+
+struct json_object* json_object_new_double(double d)
+{
+	struct json_object *jso = json_object_new(json_type_double);
+	if (!jso)
+		return NULL;
+	jso->_to_json_string = &json_object_double_to_json_string_default;
+	jso->o.c_double = d;
+	return jso;
+}
+
+struct json_object* json_object_new_double_s(double d, const char *ds)
+{
+	char *new_ds;
+	struct json_object *jso = json_object_new_double(d);
+	if (!jso)
+		return NULL;
+
+	new_ds = strdup(ds);
+	if (!new_ds)
+	{
+		json_object_generic_delete(jso);
+		errno = ENOMEM;
+		return NULL;
+	}
+	json_object_set_serializer(jso, json_object_userdata_to_json_string,
+	    new_ds, json_object_free_userdata);
+	return jso;
+}
+
+int json_object_userdata_to_json_string(struct json_object *jso,
+	struct printbuf *pb, int level, int flags)
+{
+	int userdata_len = strlen((const char *)jso->_userdata);
+	printbuf_memappend(pb, (const char *)jso->_userdata, userdata_len);
+	return userdata_len;
+}
+
+void json_object_free_userdata(struct json_object *jso, void *userdata)
+{
+	free(userdata);
+}
+
+double json_object_get_double(const struct json_object *jso)
+{
+  double cdouble;
+  char *errPtr = NULL;
+
+  if(!jso) return 0.0;
+  switch(jso->o_type) {
+  case json_type_double:
+    return jso->o.c_double;
+  case json_type_int:
+    return jso->o.c_int64;
+  case json_type_boolean:
+    return jso->o.c_boolean;
+  case json_type_string:
+    errno = 0;
+    cdouble = strtod(get_string_component(jso), &errPtr);
+
+    /* if conversion stopped at the first character, return 0.0 */
+    if (errPtr == get_string_component(jso))
+        return 0.0;
+
+    /*
+     * Check that the conversion terminated on something sensible
+     *
+     * For example, { "pay" : 123AB } would parse as 123.
+     */
+    if (*errPtr != '\0')
+        return 0.0;
+
+    /*
+     * If strtod encounters a string which would exceed the
+     * capacity of a double, it returns +/- HUGE_VAL and sets
+     * errno to ERANGE. But +/- HUGE_VAL is also a valid result
+     * from a conversion, so we need to check errno.
+     *
+     * Underflow also sets errno to ERANGE, but it returns 0 in
+     * that case, which is what we will return anyway.
+     *
+     * See CERT guideline ERR30-C
+     */
+    if ((HUGE_VAL == cdouble || -HUGE_VAL == cdouble) &&
+        (ERANGE == errno))
+            cdouble = 0.0;
+    return cdouble;
+  default:
+    return 0.0;
+  }
+}
+
+int json_object_set_double(struct json_object *jso,double new_value){
+	if (!jso || jso->o_type!=json_type_double)
+		return 0;
+	jso->o.c_double=new_value;
+	return 1;
+}
+
+/* json_object_string */
+
+static int json_object_string_to_json_string(struct json_object* jso,
+					     struct printbuf *pb,
+					     int level,
+					     int flags)
+{
+	printbuf_strappend(pb, "\"");
+	json_escape_str(pb, get_string_component(jso), jso->o.c_string.len, flags);
+	printbuf_strappend(pb, "\"");
+	return 0;
+}
+
+static void json_object_string_delete(struct json_object* jso)
+{
+	if(jso->o.c_string.len >= LEN_DIRECT_STRING_DATA)
+		free(jso->o.c_string.str.ptr);
+	json_object_generic_delete(jso);
+}
+
+struct json_object* json_object_new_string(const char *s)
+{
+	struct json_object *jso = json_object_new(json_type_string);
+	if (!jso)
+		return NULL;
+	jso->_delete = &json_object_string_delete;
+	jso->_to_json_string = &json_object_string_to_json_string;
+	jso->o.c_string.len = strlen(s);
+	if(jso->o.c_string.len < LEN_DIRECT_STRING_DATA) {
+		memcpy(jso->o.c_string.str.data, s, jso->o.c_string.len);
+	} else {
+		jso->o.c_string.str.ptr = strdup(s);
+		if (!jso->o.c_string.str.ptr)
+		{
+			json_object_generic_delete(jso);
+			errno = ENOMEM;
+			return NULL;
+		}
+	}
+	return jso;
+}
+
+struct json_object* json_object_new_string_len(const char *s, int len)
+{
+	char *dstbuf;
+	struct json_object *jso = json_object_new(json_type_string);
+	if (!jso)
+		return NULL;
+	jso->_delete = &json_object_string_delete;
+	jso->_to_json_string = &json_object_string_to_json_string;
+	if(len < LEN_DIRECT_STRING_DATA) {
+		dstbuf = jso->o.c_string.str.data;
+	} else {
+		jso->o.c_string.str.ptr = (char*)malloc(len + 1);
+		if (!jso->o.c_string.str.ptr)
+		{
+			json_object_generic_delete(jso);
+			errno = ENOMEM;
+			return NULL;
+		}
+		dstbuf = jso->o.c_string.str.ptr;
+	}
+	memcpy(dstbuf, (const void *)s, len);
+	dstbuf[len] = '\0';
+	jso->o.c_string.len = len;
+	return jso;
+}
+
+const char* json_object_get_string(struct json_object *jso)
+{
+	if (!jso)
+		return NULL;
+	switch(jso->o_type)
+	{
+	case json_type_string:
+		return get_string_component(jso);
+	default:
+		return json_object_to_json_string(jso);
+	}
+}
+
+int json_object_get_string_len(const struct json_object *jso)
+{
+	if (!jso)
+		return 0;
+	switch(jso->o_type)
+	{
+	case json_type_string:
+		return jso->o.c_string.len;
+	default:
+		return 0;
+	}
+}
+
+int json_object_set_string(json_object* jso, const char* s) {
+	return json_object_set_string_len(jso, s, (int)(strlen(s)));
+}
+
+int json_object_set_string_len(json_object* jso, const char* s, int len){
+	char *dstbuf; 
+	if (jso==NULL || jso->o_type!=json_type_string) return 0; 	
+	if (len<LEN_DIRECT_STRING_DATA) {
+		dstbuf=jso->o.c_string.str.data;
+		if (jso->o.c_string.len>=LEN_DIRECT_STRING_DATA) free(jso->o.c_string.str.ptr); 
+	} else {
+		dstbuf=(char *)malloc(len+1);
+		if (dstbuf==NULL) return 0;
+		if (jso->o.c_string.len>=LEN_DIRECT_STRING_DATA) free(jso->o.c_string.str.ptr);
+		jso->o.c_string.str.ptr=dstbuf;
+	}
+	jso->o.c_string.len=len;
+	memcpy(dstbuf, (const void *)s, len);
+	dstbuf[len] = '\0';
+	return 1; 
+}
+
+/* json_object_array */
+
+static int json_object_array_to_json_string(struct json_object* jso,
+                                            struct printbuf *pb,
+                                            int level,
+                                            int flags)
+{
+	int had_children = 0;
+	size_t ii;
+
+	printbuf_strappend(pb, "[");
+	if (flags & JSON_C_TO_STRING_PRETTY)
+		printbuf_strappend(pb, "\n");
+	for(ii=0; ii < json_object_array_length(jso); ii++)
+	{
+		struct json_object *val;
+		if (had_children)
+		{
+			printbuf_strappend(pb, ",");
+			if (flags & JSON_C_TO_STRING_PRETTY)
+				printbuf_strappend(pb, "\n");
+		}
+		had_children = 1;
+		if (flags & JSON_C_TO_STRING_SPACED)
+			printbuf_strappend(pb, " ");
+		indent(pb, level + 1, flags);
+		val = json_object_array_get_idx(jso, ii);
+		if(val == NULL)
+			printbuf_strappend(pb, "null");
+		else
+			if (val->_to_json_string(val, pb, level+1, flags) < 0)
+				return -1;
+	}
+	if (flags & JSON_C_TO_STRING_PRETTY)
+	{
+		if (had_children)
+			printbuf_strappend(pb, "\n");
+		indent(pb,level,flags);
+	}
+
+	if (flags & JSON_C_TO_STRING_SPACED)
+		return printbuf_strappend(pb, " ]");
+	return printbuf_strappend(pb, "]");
+}
+
+static void json_object_array_entry_free(void *data)
+{
+	json_object_put((struct json_object*)data);
+}
+
+static void json_object_array_delete(struct json_object* jso)
+{
+	array_list_free(jso->o.c_array);
+	json_object_generic_delete(jso);
+}
+
+struct json_object* json_object_new_array(void)
+{
+	struct json_object *jso = json_object_new(json_type_array);
+	if (!jso)
+		return NULL;
+	jso->_delete = &json_object_array_delete;
+	jso->_to_json_string = &json_object_array_to_json_string;
+	jso->o.c_array = array_list_new(&json_object_array_entry_free);
+        if(jso->o.c_array == NULL)
+	{
+	    free(jso);
+	    return NULL;
+	}
+	return jso;
+}
+
+struct array_list* json_object_get_array(const struct json_object *jso)
+{
+	if (!jso)
+		return NULL;
+	switch(jso->o_type)
+	{
+	case json_type_array:
+		return jso->o.c_array;
+	default:
+		return NULL;
+	}
+}
+
+void json_object_array_sort(struct json_object *jso,
+			    int(*sort_fn)(const void *, const void *))
+{
+	assert(json_object_get_type(jso) == json_type_array);
+	array_list_sort(jso->o.c_array, sort_fn);
+}
+
+struct json_object* json_object_array_bsearch(
+		const struct json_object *key,
+		const struct json_object *jso,
+		int (*sort_fn)(const void *, const void *))
+{
+	struct json_object **result;
+
+	assert(json_object_get_type(jso) == json_type_array);
+	result = (struct json_object **)array_list_bsearch(
+			(const void **)(void *)&key, jso->o.c_array, sort_fn);
+
+	if (!result)
+		return NULL;
+	return *result;
+}
+
+size_t json_object_array_length(const struct json_object *jso)
+{
+	assert(json_object_get_type(jso) == json_type_array);
+	return array_list_length(jso->o.c_array);
+}
+
+int json_object_array_add(struct json_object *jso,struct json_object *val)
+{
+	assert(json_object_get_type(jso) == json_type_array);
+	return array_list_add(jso->o.c_array, val);
+}
+
+int json_object_array_put_idx(struct json_object *jso, size_t idx,
+			      struct json_object *val)
+{
+	assert(json_object_get_type(jso) == json_type_array);
+	return array_list_put_idx(jso->o.c_array, idx, val);
+}
+
+int json_object_array_del_idx(struct json_object *jso, size_t idx, size_t count)
+{
+	assert(json_object_get_type(jso) == json_type_array);
+	return array_list_del_idx(jso->o.c_array, idx, count);
+}
+
+struct json_object* json_object_array_get_idx(const struct json_object *jso,
+					      size_t idx)
+{
+	assert(json_object_get_type(jso) == json_type_array);
+	return (struct json_object*)array_list_get_idx(jso->o.c_array, idx);
+}
+
+static int json_array_equal(struct json_object* jso1,
+			    struct json_object* jso2)
+{
+	size_t len, i;
+
+	len = json_object_array_length(jso1);
+	if (len != json_object_array_length(jso2))
+		return 0;
+
+	for (i = 0; i < len; i++) {
+		if (!json_object_equal(json_object_array_get_idx(jso1, i),
+				       json_object_array_get_idx(jso2, i)))
+			return 0;
+	}
+	return 1;
+}
+
+static int json_object_all_values_equal(struct json_object* jso1,
+					struct json_object* jso2)
+{
+	struct json_object_iter iter;
+	struct json_object *sub;
+
+	assert(json_object_get_type(jso1) == json_type_object);
+	assert(json_object_get_type(jso2) == json_type_object);
+	/* Iterate over jso1 keys and see if they exist and are equal in jso2 */
+        json_object_object_foreachC(jso1, iter) {
+		if (!lh_table_lookup_ex(jso2->o.c_object, (void*)iter.key,
+					(void**)(void *)&sub))
+			return 0;
+		if (!json_object_equal(iter.val, sub))
+			return 0;
+        }
+
+	/* Iterate over jso2 keys to see if any exist that are not in jso1 */
+        json_object_object_foreachC(jso2, iter) {
+		if (!lh_table_lookup_ex(jso1->o.c_object, (void*)iter.key,
+					(void**)(void *)&sub))
+			return 0;
+        }
+
+	return 1;
+}
+
+int json_object_equal(struct json_object* jso1, struct json_object* jso2)
+{
+	if (jso1 == jso2)
+		return 1;
+
+	if (!jso1 || !jso2)
+		return 0;
+
+	if (jso1->o_type != jso2->o_type)
+		return 0;
+
+	switch(jso1->o_type) {
+		case json_type_boolean:
+			return (jso1->o.c_boolean == jso2->o.c_boolean);
+
+		case json_type_double:
+			return (jso1->o.c_double == jso2->o.c_double);
+
+		case json_type_int:
+			return (jso1->o.c_int64 == jso2->o.c_int64);
+
+		case json_type_string:
+			return (jso1->o.c_string.len == jso2->o.c_string.len &&
+				memcmp(get_string_component(jso1),
+				       get_string_component(jso2),
+				       jso1->o.c_string.len) == 0);
+
+		case json_type_object:
+			return json_object_all_values_equal(jso1, jso2);
+
+		case json_type_array:
+			return json_array_equal(jso1, jso2);
+
+		case json_type_null:
+			return 1;
+	};
+
+	return 0;
+}
+
+static int json_object_copy_serializer_data(struct json_object *src, struct json_object *dst)
+{
+	if (!src->_userdata && !src->_user_delete)
+		return 0;
+
+	if (dst->_to_json_string == json_object_userdata_to_json_string)
+	{
+		dst->_userdata = strdup(src->_userdata);
+	}
+	// else if ... other supported serializers ...
+	else
+	{
+		_json_c_set_last_err("json_object_deep_copy: unable to copy unknown serializer data: %p\n", dst->_to_json_string);
+		return -1;
+	}
+	dst->_user_delete = src->_user_delete;
+	return 0;
+}
+
+
+/**
+ * The default shallow copy implementation.  Simply creates a new object of the same
+ * type but does *not* copy over _userdata nor retain any custom serializer.
+ * If custom serializers are in use, json_object_deep_copy() must be passed a shallow copy
+ * implementation that is aware of how to copy them.
+ *
+ * This always returns -1 or 1.  It will never return 2 since it does not copy the serializer.
+ */
+int json_c_shallow_copy_default(json_object *src, json_object *parent, const char *key, size_t index, json_object **dst)
+{
+	switch (src->o_type) {
+	case json_type_boolean:
+		*dst = json_object_new_boolean(src->o.c_boolean);
+		break;
+
+	case json_type_double:
+		*dst = json_object_new_double(src->o.c_double);
+		break;
+
+	case json_type_int:
+		*dst = json_object_new_int64(src->o.c_int64);
+		break;
+
+	case json_type_string:
+		*dst = json_object_new_string(get_string_component(src));
+		break;
+
+	case json_type_object:
+		*dst = json_object_new_object();
+		break;
+
+	case json_type_array:
+		*dst = json_object_new_array();
+		break;
+
+	default:
+		errno = EINVAL;
+		return -1;
+	}
+
+	if (!*dst) {
+		errno = ENOMEM;
+		return -1;
+	}
+	(*dst)->_to_json_string = src->_to_json_string;
+	// _userdata and _user_delete are copied later
+	return 1;
+}
+
+/*
+ * The actual guts of json_object_deep_copy(), with a few additional args
+ * needed so we can keep track of where we are within the object tree.
+ *
+ * Note: caller is responsible for freeing *dst if this fails and returns -1.
+ */
+static int json_object_deep_copy_recursive(struct json_object *src, struct json_object *parent, const char *key_in_parent, size_t index_in_parent, struct json_object **dst, json_c_shallow_copy_fn *shallow_copy)
+{
+	struct json_object_iter iter;
+	size_t src_array_len, ii;
+
+	int shallow_copy_rc = 0;
+	shallow_copy_rc = shallow_copy(src, parent, key_in_parent, index_in_parent, dst);
+	/* -1=error, 1=object created ok, 2=userdata set */
+	if (shallow_copy_rc < 1)
+	{
+		errno = EINVAL;
+		return -1;
+	}
+	assert(*dst != NULL);
+
+	switch (src->o_type) {
+	case json_type_object:
+		json_object_object_foreachC(src, iter) {
+			struct json_object *jso = NULL;
+			/* This handles the `json_type_null` case */
+			if (!iter.val)
+				jso = NULL;
+			else if (json_object_deep_copy_recursive(iter.val, src, iter.key, -1, &jso, shallow_copy) < 0)
+			{
+				json_object_put(jso);
+				return -1;
+			}
+
+			if (json_object_object_add(*dst, iter.key, jso) < 0)
+			{
+				json_object_put(jso);
+				return -1;
+			}
+		}
+		break;
+
+	case json_type_array:
+		src_array_len = json_object_array_length(src);
+		for (ii = 0; ii < src_array_len; ii++) {
+			struct json_object *jso = NULL;
+			struct json_object *jso1 = json_object_array_get_idx(src, ii);
+			/* This handles the `json_type_null` case */
+			if (!jso1)
+				jso = NULL;
+			else if (json_object_deep_copy_recursive(jso1, src, NULL, ii, &jso, shallow_copy) < 0)
+			{
+				json_object_put(jso);
+				return -1;
+			}
+
+			if (json_object_array_add(*dst, jso) < 0)
+			{
+				json_object_put(jso);
+				return -1;
+			}
+		}
+		break;
+
+	default:
+		break;
+		/* else, nothing to do, shallow_copy already did. */
+	}
+
+	if (shallow_copy_rc != 2)
+		return json_object_copy_serializer_data(src, *dst);
+
+	return 0;
+}
+
+int json_object_deep_copy(struct json_object *src, struct json_object **dst, json_c_shallow_copy_fn *shallow_copy)
+{
+	int rc;
+
+	/* Check if arguments are sane ; *dst must not point to a non-NULL object */
+	if (!src || !dst || *dst) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	if (shallow_copy == NULL)
+		shallow_copy = json_c_shallow_copy_default;
+
+	rc = json_object_deep_copy_recursive(src, NULL, NULL, -1, dst, shallow_copy);
+	if (rc < 0) {
+		json_object_put(*dst);
+		*dst = NULL;
+	}
+
+	return rc;
+}
+
diff --git a/third_party/json-c/json_object.h b/third_party/json-c/json_object.h
new file mode 100644
index 0000000000..073d80c617
--- /dev/null
+++ b/third_party/json-c/json_object.h
@@ -0,0 +1,1034 @@
+/*
+ * $Id: json_object.h,v 1.12 2006/01/30 23:07:57 mclark Exp $
+ *
+ * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ * Copyright (c) 2009 Hewlett-Packard Development Company, L.P.
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+/**
+ * @file
+ * @brief Core json-c API.  Start here, or with json_tokener.h
+ */
+#ifndef _json_object_h_
+#define _json_object_h_
+
+#ifdef __GNUC__
+#define THIS_FUNCTION_IS_DEPRECATED(func) func __attribute__ ((deprecated))
+#elif defined(_MSC_VER)
+#define THIS_FUNCTION_IS_DEPRECATED(func) __declspec(deprecated) func
+#elif defined(__clang__)
+#define THIS_FUNCTION_IS_DEPRECATED(func) func __deprecated
+#else
+#define THIS_FUNCTION_IS_DEPRECATED(func) func
+#endif
+
+#ifdef __GNUC__
+#define JSON_C_CONST_FUNCTION(func) func __attribute__((const))
+#else
+#define JSON_C_CONST_FUNCTION(func) func
+#endif
+
+#if defined(_MSC_VER) 
+#define JSON_EXPORT __declspec(dllexport)
+#else
+#define JSON_EXPORT extern
+#endif
+
+#include <stddef.h>
+#include "json_inttypes.h"
+#include "printbuf.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define JSON_OBJECT_DEF_HASH_ENTRIES 16
+
+/**
+ * A flag for the json_object_to_json_string_ext() and
+ * json_object_to_file_ext() functions which causes the output
+ * to have no extra whitespace or formatting applied.
+ */
+#define JSON_C_TO_STRING_PLAIN      0
+/**
+ * A flag for the json_object_to_json_string_ext() and
+ * json_object_to_file_ext() functions which causes the output to have
+ * minimal whitespace inserted to make things slightly more readable.
+ */
+#define JSON_C_TO_STRING_SPACED     (1<<0)
+/**
+ * A flag for the json_object_to_json_string_ext() and
+ * json_object_to_file_ext() functions which causes
+ * the output to be formatted.
+ *
+ * See the "Two Space Tab" option at http://jsonformatter.curiousconcept.com/
+ * for an example of the format.
+ */
+#define JSON_C_TO_STRING_PRETTY     (1<<1)
+/**
+ * A flag for the json_object_to_json_string_ext() and
+ * json_object_to_file_ext() functions which causes
+ * the output to be formatted.
+ *
+ * Instead of a "Two Space Tab" this gives a single tab character.
+ */
+#define JSON_C_TO_STRING_PRETTY_TAB (1<<3)
+/**
+ * A flag to drop trailing zero for float values
+ */
+#define JSON_C_TO_STRING_NOZERO     (1<<2)
+
+/**
+ * Don't escape forward slashes.
+ */
+#define JSON_C_TO_STRING_NOSLASHESCAPE (1<<4)
+
+/**
+ * A flag for the json_object_object_add_ex function which
+ * causes the value to be added without a check if it already exists.
+ * Note: it is the responsibilty of the caller to ensure that no
+ * key is added multiple times. If this is done, results are
+ * unpredictable. While this option is somewhat dangerous, it
+ * permits potentially large performance savings in code that
+ * knows for sure the key values are unique (e.g. because the
+ * code adds a well-known set of constant key values).
+ */
+#define JSON_C_OBJECT_ADD_KEY_IS_NEW (1<<1)
+/**
+ * A flag for the json_object_object_add_ex function which
+ * flags the key as being constant memory. This means that
+ * the key will NOT be copied via strdup(), resulting in a
+ * potentially huge performance win (malloc, strdup and
+ * free are usually performance hogs). It is acceptable to
+ * use this flag for keys in non-constant memory blocks if
+ * the caller ensure that the memory holding the key lives
+ * longer than the corresponding json object. However, this
+ * is somewhat dangerous and should only be done if really
+ * justified.
+ * The general use-case for this flag is cases where the
+ * key is given as a real constant value in the function
+ * call, e.g. as in
+ *   json_object_object_add_ex(obj, "ip", json,
+ *       JSON_C_OBJECT_KEY_IS_CONSTANT);
+ */
+#define JSON_C_OBJECT_KEY_IS_CONSTANT (1<<2)
+
+#undef FALSE
+#define FALSE ((json_bool)0)
+
+#undef TRUE
+#define TRUE ((json_bool)1)
+
+/**
+ * Set the global value of an option, which will apply to all
+ * current and future threads that have not set a thread-local value.
+ *
+ * @see json_c_set_serialization_double_format
+ */
+#define JSON_C_OPTION_GLOBAL (0)
+/**
+ * Set a thread-local value of an option, overriding the global value.
+ * This will fail if json-c is not compiled with threading enabled, and
+ * with the __thread specifier (or equivalent) available.
+ *
+ * @see json_c_set_serialization_double_format
+ */
+#define JSON_C_OPTION_THREAD (1)
+
+/**
+ * A structure to use with json_object_object_foreachC() loops.
+ * Contains key, val and entry members.
+ */
+struct json_object_iter
+{
+	char *key;
+	struct json_object *val;
+	struct lh_entry *entry;
+};
+typedef struct json_object_iter json_object_iter;
+
+typedef int json_bool;
+
+/**
+ * @brief The core type for all type of JSON objects handled by json-c
+ */
+typedef struct json_object json_object;
+
+/**
+ * Type of custom user delete functions.  See json_object_set_serializer.
+ */
+typedef void (json_object_delete_fn)(struct json_object *jso, void *userdata);
+
+/**
+ * Type of a custom serialization function.  See json_object_set_serializer.
+ */
+typedef int (json_object_to_json_string_fn)(struct json_object *jso,
+						struct printbuf *pb,
+						int level,
+						int flags);
+
+/* supported object types */
+
+typedef enum json_type {
+  /* If you change this, be sure to update json_type_to_name() too */
+  json_type_null,
+  json_type_boolean,
+  json_type_double,
+  json_type_int,
+  json_type_object,
+  json_type_array,
+  json_type_string
+} json_type;
+
+/* reference counting functions */
+
+/**
+ * Increment the reference count of json_object, thereby grabbing shared
+ * ownership of obj.
+ *
+ * @param obj the json_object instance
+ */
+JSON_EXPORT struct json_object* json_object_get(struct json_object *obj);
+
+/**
+ * Decrement the reference count of json_object and free if it reaches zero.
+ * You must have ownership of obj prior to doing this or you will cause an
+ * imbalance in the reference count.
+ *
+ * @param obj the json_object instance
+ * @returns 1 if the object was freed.
+ */
+JSON_EXPORT int json_object_put(struct json_object *obj);
+
+/**
+ * Check if the json_object is of a given type
+ * @param obj the json_object instance
+ * @param type one of:
+     json_type_null (i.e. obj == NULL),
+     json_type_boolean,
+     json_type_double,
+     json_type_int,
+     json_type_object,
+     json_type_array,
+     json_type_string
+ */
+JSON_EXPORT int json_object_is_type(const struct json_object *obj, enum json_type type);
+
+/**
+ * Get the type of the json_object.  See also json_type_to_name() to turn this
+ * into a string suitable, for instance, for logging.
+ *
+ * @param obj the json_object instance
+ * @returns type being one of:
+     json_type_null (i.e. obj == NULL),
+     json_type_boolean,
+     json_type_double,
+     json_type_int,
+     json_type_object,
+     json_type_array,
+     json_type_string
+ */
+JSON_EXPORT enum json_type json_object_get_type(const struct json_object *obj);
+
+
+/** Stringify object to json format.
+ * Equivalent to json_object_to_json_string_ext(obj, JSON_C_TO_STRING_SPACED)
+ * The pointer you get is an internal of your json object. You don't
+ * have to free it, later use of json_object_put() should be sufficient.
+ * If you can not ensure there's no concurrent access to *obj use
+ * strdup().
+ * @param obj the json_object instance
+ * @returns a string in JSON format
+ */
+JSON_EXPORT const char* json_object_to_json_string(struct json_object *obj);
+
+/** Stringify object to json format
+ * @see json_object_to_json_string() for details on how to free string.
+ * @param obj the json_object instance
+ * @param flags formatting options, see JSON_C_TO_STRING_PRETTY and other constants
+ * @returns a string in JSON format
+ */
+JSON_EXPORT const char* json_object_to_json_string_ext(struct json_object *obj, int
+flags);
+
+/** Stringify object to json format
+ * @see json_object_to_json_string() for details on how to free string.
+ * @param obj the json_object instance
+ * @param flags formatting options, see JSON_C_TO_STRING_PRETTY and other constants
+ * @param length a pointer where, if not NULL, the length (without null) is stored
+ * @returns a string in JSON format and the length if not NULL
+ */
+JSON_EXPORT const char* json_object_to_json_string_length(struct json_object *obj, int
+flags, size_t *length);
+
+/**
+ * Returns the userdata set by json_object_set_userdata() or
+ * json_object_set_serializer()
+ *
+ * @param jso the object to return the userdata for
+ */
+JSON_EXPORT void* json_object_get_userdata(json_object *jso);
+
+/**
+ * Set an opaque userdata value for an object
+ *
+ * The userdata can be retrieved using json_object_get_userdata().
+ *
+ * If custom userdata is already set on this object, any existing user_delete
+ * function is called before the new one is set.
+ *
+ * The user_delete parameter is optional and may be passed as NULL, even if
+ * the userdata parameter is non-NULL.  It will be called just before the
+ * json_object is deleted, after it's reference count goes to zero
+ * (see json_object_put()).
+ * If this is not provided, it is up to the caller to free the userdata at
+ * an appropriate time. (i.e. after the json_object is deleted)
+ *
+ * Note: Objects created by parsing strings may have custom serializers set
+ * which expect the userdata to contain specific data (due to use of
+ * json_object_new_double_s()). In this case, json_object_set_serialiser() with
+ * NULL as to_string_func should be used instead to set the userdata and reset
+ * the serializer to its default value.
+ *
+ * @param jso the object to set the userdata for
+ * @param userdata an optional opaque cookie
+ * @param user_delete an optional function from freeing userdata
+ */
+JSON_EXPORT void json_object_set_userdata(json_object *jso, void *userdata,
+				     json_object_delete_fn *user_delete);
+
+/**
+ * Set a custom serialization function to be used when this particular object
+ * is converted to a string by json_object_to_json_string.
+ *
+ * If custom userdata is already set on this object, any existing user_delete
+ * function is called before the new one is set.
+ *
+ * If to_string_func is NULL the default behaviour is reset (but the userdata
+ * and user_delete fields are still set).
+ *
+ * The userdata parameter is optional and may be passed as NULL. It can be used
+ * to provide additional data for to_string_func to use. This parameter may
+ * be NULL even if user_delete is non-NULL.
+ *
+ * The user_delete parameter is optional and may be passed as NULL, even if
+ * the userdata parameter is non-NULL.  It will be called just before the
+ * json_object is deleted, after it's reference count goes to zero
+ * (see json_object_put()).
+ * If this is not provided, it is up to the caller to free the userdata at
+ * an appropriate time. (i.e. after the json_object is deleted)
+ *
+ * Note that the userdata is the same as set by json_object_set_userdata(), so
+ * care must be taken not to overwrite the value when both a custom serializer
+ * and json_object_set_userdata() are used.
+ *
+ * @param jso the object to customize
+ * @param to_string_func the custom serialization function
+ * @param userdata an optional opaque cookie
+ * @param user_delete an optional function from freeing userdata
+ */
+JSON_EXPORT void json_object_set_serializer(json_object *jso,
+	json_object_to_json_string_fn *to_string_func,
+	void *userdata,
+	json_object_delete_fn *user_delete);
+
+#ifdef __clang__
+/*
+ * Clang doesn't pay attention to the parameters defined in the
+ * function typedefs used here, so turn off spurious doc warnings.
+ * {
+ */
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdocumentation"
+#endif
+
+/**
+ * Simply call free on the userdata pointer.
+ * Can be used with json_object_set_serializer().
+ *
+ * @param jso unused
+ * @param userdata the pointer that is passed to free().
+ */
+json_object_delete_fn json_object_free_userdata;
+
+/**
+ * Copy the jso->_userdata string over to pb as-is.
+ * Can be used with json_object_set_serializer().
+ *
+ * @param jso The object whose _userdata is used.
+ * @param pb The destination buffer.
+ * @param level Ignored.
+ * @param flags Ignored.
+ */
+json_object_to_json_string_fn json_object_userdata_to_json_string;
+
+#ifdef __clang__
+/* } */
+#pragma clang diagnostic pop
+#endif
+
+
+/* object type methods */
+
+/** Create a new empty object with a reference count of 1.  The caller of
+ * this object initially has sole ownership.  Remember, when using
+ * json_object_object_add or json_object_array_put_idx, ownership will
+ * transfer to the object/array.  Call json_object_get if you want to maintain
+ * shared ownership or also add this object as a child of multiple objects or
+ * arrays.  Any ownerships you acquired but did not transfer must be released
+ * through json_object_put.
+ *
+ * @returns a json_object of type json_type_object
+ */
+JSON_EXPORT struct json_object* json_object_new_object(void);
+
+/** Get the hashtable of a json_object of type json_type_object
+ * @param obj the json_object instance
+ * @returns a linkhash
+ */
+JSON_EXPORT struct lh_table* json_object_get_object(const struct json_object *obj);
+
+/** Get the size of an object in terms of the number of fields it has.
+ * @param obj the json_object whose length to return
+ */
+JSON_EXPORT int json_object_object_length(const struct json_object* obj);
+
+/** Get the sizeof (struct json_object).
+ * @returns a size_t with the sizeof (struct json_object)
+ */
+JSON_C_CONST_FUNCTION(JSON_EXPORT size_t json_c_object_sizeof(void));
+
+/** Add an object field to a json_object of type json_type_object
+ *
+ * The reference count will *not* be incremented. This is to make adding
+ * fields to objects in code more compact. If you want to retain a reference
+ * to an added object, independent of the lifetime of obj, you must wrap the
+ * passed object with json_object_get.
+ *
+ * Upon calling this, the ownership of val transfers to obj.  Thus you must
+ * make sure that you do in fact have ownership over this object.  For instance,
+ * json_object_new_object will give you ownership until you transfer it,
+ * whereas json_object_object_get does not.
+ *
+ * @param obj the json_object instance
+ * @param key the object field name (a private copy will be duplicated)
+ * @param val a json_object or NULL member to associate with the given field
+ *
+ * @return On success, <code>0</code> is returned.
+ * 	On error, a negative value is returned.
+ */
+JSON_EXPORT int json_object_object_add(struct json_object* obj, const char *key,
+				   struct json_object *val);
+
+/** Add an object field to a json_object of type json_type_object
+ *
+ * The semantics are identical to json_object_object_add, except that an
+ * additional flag fields gives you more control over some detail aspects
+ * of processing. See the description of JSON_C_OBJECT_ADD_* flags for more
+ * details.
+ *
+ * @param obj the json_object instance
+ * @param key the object field name (a private copy will be duplicated)
+ * @param val a json_object or NULL member to associate with the given field
+ * @param opts process-modifying options. To specify multiple options, use 
+ *             arithmetic or (OPT1|OPT2)
+ */
+JSON_EXPORT int json_object_object_add_ex(struct json_object* obj,
+				const char *const key,
+				struct json_object *const val,
+				const unsigned opts);
+
+/** Get the json_object associate with a given object field.
+ * Deprecated/discouraged: used json_object_object_get_ex instead.
+ *
+ * This returns NULL if the field is found but its value is null, or if
+ *  the field is not found, or if obj is not a json_type_object.  If you
+ *  need to distinguis between these cases, use json_object_object_get_ex().
+ *
+ * *No* reference counts will be changed.  There is no need to manually adjust
+ * reference counts through the json_object_put/json_object_get methods unless
+ * you need to have the child (value) reference maintain a different lifetime
+ * than the owning parent (obj). Ownership of the returned value is retained
+ * by obj (do not do json_object_put unless you have done a json_object_get).
+ * If you delete the value from obj (json_object_object_del) and wish to access
+ * the returned reference afterwards, make sure you have first gotten shared
+ * ownership through json_object_get (& don't forget to do a json_object_put
+ * or transfer ownership to prevent a memory leak).
+ *
+ * @param obj the json_object instance
+ * @param key the object field name
+ * @returns the json_object associated with the given field name
+ */
+JSON_EXPORT struct json_object* json_object_object_get(const struct json_object* obj,
+						  const char *key);
+
+/** Get the json_object associated with a given object field.
+ *
+ * This returns true if the key is found, false in all other cases (including
+ * if obj isn't a json_type_object).
+ *
+ * *No* reference counts will be changed.  There is no need to manually adjust
+ * reference counts through the json_object_put/json_object_get methods unless
+ * you need to have the child (value) reference maintain a different lifetime
+ * than the owning parent (obj).  Ownership of value is retained by obj.
+ *
+ * @param obj the json_object instance
+ * @param key the object field name
+ * @param value a pointer where to store a reference to the json_object
+ *              associated with the given field name.
+ *
+ *              It is safe to pass a NULL value.
+ * @returns whether or not the key exists
+ */
+JSON_EXPORT json_bool json_object_object_get_ex(const struct json_object* obj,
+                                           const char *key,
+                                           struct json_object **value);
+
+/** Delete the given json_object field
+ *
+ * The reference count will be decremented for the deleted object.  If there
+ * are no more owners of the value represented by this key, then the value is
+ * freed.  Otherwise, the reference to the value will remain in memory.
+ *
+ * @param obj the json_object instance
+ * @param key the object field name
+ */
+JSON_EXPORT void json_object_object_del(struct json_object* obj, const char *key);
+
+/**
+ * Iterate through all keys and values of an object.
+ *
+ * Adding keys to the object while iterating is NOT allowed.
+ *
+ * Deleting an existing key, or replacing an existing key with a
+ * new value IS allowed.
+ *
+ * @param obj the json_object instance
+ * @param key the local name for the char* key variable defined in the body
+ * @param val the local name for the json_object* object variable defined in
+ *            the body
+ */
+#if defined(__GNUC__) && !defined(__STRICT_ANSI__) && __STDC_VERSION__ >= 199901L
+
+# define json_object_object_foreach(obj,key,val) \
+	char *key = NULL; \
+	struct json_object *val __attribute__((__unused__)) = NULL; \
+	for(struct lh_entry *entry ## key = json_object_get_object(obj)->head, *entry_next ## key = NULL; \
+		({ if(entry ## key) { \
+			key = (char*)lh_entry_k(entry ## key); \
+			val = (struct json_object*)lh_entry_v(entry ## key); \
+			entry_next ## key = entry ## key->next; \
+		} ; entry ## key; }); \
+		entry ## key = entry_next ## key )
+
+#else /* ANSI C or MSC */
+
+# define json_object_object_foreach(obj,key,val) \
+	char *key = NULL;\
+	struct json_object *val = NULL; \
+	struct lh_entry *entry ## key; \
+	struct lh_entry *entry_next ## key = NULL; \
+	for(entry ## key = json_object_get_object(obj)->head; \
+		(entry ## key ? ( \
+			key = (char*)lh_entry_k(entry ## key), \
+			val = (struct json_object*)lh_entry_v(entry ## key), \
+			entry_next ## key = entry ## key->next, \
+			entry ## key) : 0); \
+		entry ## key = entry_next ## key)
+
+#endif /* defined(__GNUC__) && !defined(__STRICT_ANSI__) && __STDC_VERSION__ >= 199901L */
+
+/** Iterate through all keys and values of an object (ANSI C Safe)
+ * @param obj the json_object instance
+ * @param iter the object iterator, use type json_object_iter
+ */
+#define json_object_object_foreachC(obj,iter) \
+ for(iter.entry = json_object_get_object(obj)->head; \
+     (iter.entry ? (iter.key = (char*)lh_entry_k(iter.entry), iter.val = (struct json_object*)lh_entry_v(iter.entry), iter.entry) : 0); \
+     iter.entry = iter.entry->next)
+
+/* Array type methods */
+
+/** Create a new empty json_object of type json_type_array
+ * @returns a json_object of type json_type_array
+ */
+JSON_EXPORT struct json_object* json_object_new_array(void);
+
+/** Get the arraylist of a json_object of type json_type_array
+ * @param obj the json_object instance
+ * @returns an arraylist
+ */
+JSON_EXPORT struct array_list* json_object_get_array(const struct json_object *obj);
+
+/** Get the length of a json_object of type json_type_array
+ * @param obj the json_object instance
+ * @returns an int
+ */
+JSON_EXPORT size_t json_object_array_length(const struct json_object *obj);
+
+/** Sorts the elements of jso of type json_type_array
+*
+* Pointers to the json_object pointers will be passed as the two arguments
+* to sort_fn
+*
+* @param jso the json_object instance
+* @param sort_fn a sorting function
+*/
+JSON_EXPORT void json_object_array_sort(struct json_object *jso, int(*sort_fn)(const void *, const void *));
+
+/** Binary search a sorted array for a specified key object.
+ *
+ * It depends on your compare function what's sufficient as a key.
+ * Usually you create some dummy object with the parameter compared in
+ * it, to identify the right item you're actually looking for.
+ *
+ * @see json_object_array_sort() for hints on the compare function.
+ *
+ * @param key a dummy json_object with the right key
+ * @param jso the array object we're searching
+ * @param sort_fn the sort/compare function
+ *
+ * @return the wanted json_object instance
+ */
+JSON_EXPORT struct json_object* json_object_array_bsearch(
+		const struct json_object *key,
+		const struct json_object *jso,
+		int (*sort_fn)(const void *, const void *));
+
+/** Add an element to the end of a json_object of type json_type_array
+ *
+ * The reference count will *not* be incremented. This is to make adding
+ * fields to objects in code more compact. If you want to retain a reference
+ * to an added object you must wrap the passed object with json_object_get
+ *
+ * @param obj the json_object instance
+ * @param val the json_object to be added
+ */
+JSON_EXPORT int json_object_array_add(struct json_object *obj,
+				 struct json_object *val);
+
+/** Insert or replace an element at a specified index in an array (a json_object of type json_type_array)
+ *
+ * The reference count will *not* be incremented. This is to make adding
+ * fields to objects in code more compact. If you want to retain a reference
+ * to an added object you must wrap the passed object with json_object_get
+ *
+ * The reference count of a replaced object will be decremented.
+ *
+ * The array size will be automatically be expanded to the size of the
+ * index if the index is larger than the current size.
+ *
+ * @param obj the json_object instance
+ * @param idx the index to insert the element at
+ * @param val the json_object to be added
+ */
+JSON_EXPORT int json_object_array_put_idx(struct json_object *obj, size_t idx,
+				     struct json_object *val);
+
+/** Get the element at specificed index of the array (a json_object of type json_type_array)
+ * @param obj the json_object instance
+ * @param idx the index to get the element at
+ * @returns the json_object at the specified index (or NULL)
+ */
+JSON_EXPORT struct json_object* json_object_array_get_idx(const struct json_object *obj,
+						     size_t idx);
+
+/** Delete an elements from a specified index in an array (a json_object of type json_type_array)
+ *
+ * The reference count will be decremented for each of the deleted objects.  If there
+ * are no more owners of an element that is being deleted, then the value is 
+ * freed.  Otherwise, the reference to the value will remain in memory.
+ *
+ * @param obj the json_object instance
+ * @param idx the index to start deleting elements at
+ * @param count the number of elements to delete
+ * @returns 0 if the elements were successfully deleted
+ */
+JSON_EXPORT int json_object_array_del_idx(struct json_object *obj, size_t idx, size_t count);
+
+/* json_bool type methods */
+
+/** Create a new empty json_object of type json_type_boolean
+ * @param b a json_bool TRUE or FALSE (1 or 0)
+ * @returns a json_object of type json_type_boolean
+ */
+JSON_EXPORT struct json_object* json_object_new_boolean(json_bool b);
+
+/** Get the json_bool value of a json_object
+ *
+ * The type is coerced to a json_bool if the passed object is not a json_bool.
+ * integer and double objects will return FALSE if there value is zero
+ * or TRUE otherwise. If the passed object is a string it will return
+ * TRUE if it has a non zero length. If any other object type is passed
+ * TRUE will be returned if the object is not NULL.
+ *
+ * @param obj the json_object instance
+ * @returns a json_bool
+ */
+JSON_EXPORT json_bool json_object_get_boolean(const struct json_object *obj);
+
+
+/** Set the json_bool value of a json_object
+ * 
+ * The type of obj is checked to be a json_type_boolean and 0 is returned 
+ * if it is not without any further actions. If type of obj is json_type_boolean
+ * the obect value is chaned to new_value
+ *
+ * @param obj the json_object instance
+ * @param new_value the value to be set
+ * @returns 1 if value is set correctly, 0 otherwise
+ */
+JSON_EXPORT int json_object_set_boolean(struct json_object *obj,json_bool new_value);
+
+
+/* int type methods */
+
+/** Create a new empty json_object of type json_type_int
+ * Note that values are stored as 64-bit values internally.
+ * To ensure the full range is maintained, use json_object_new_int64 instead.
+ * @param i the integer
+ * @returns a json_object of type json_type_int
+ */
+JSON_EXPORT struct json_object* json_object_new_int(int32_t i);
+
+
+/** Create a new empty json_object of type json_type_int
+ * @param i the integer
+ * @returns a json_object of type json_type_int
+ */
+JSON_EXPORT struct json_object* json_object_new_int64(int64_t i);
+
+
+/** Get the int value of a json_object
+ *
+ * The type is coerced to a int if the passed object is not a int.
+ * double objects will return their integer conversion. Strings will be
+ * parsed as an integer. If no conversion exists then 0 is returned
+ * and errno is set to EINVAL. null is equivalent to 0 (no error values set)
+ *
+ * Note that integers are stored internally as 64-bit values.
+ * If the value of too big or too small to fit into 32-bit, INT32_MAX or
+ * INT32_MIN are returned, respectively.
+ *
+ * @param obj the json_object instance
+ * @returns an int
+ */
+JSON_EXPORT int32_t json_object_get_int(const struct json_object *obj);
+
+/** Set the int value of a json_object
+ * 
+ * The type of obj is checked to be a json_type_int and 0 is returned 
+ * if it is not without any further actions. If type of obj is json_type_int
+ * the obect value is changed to new_value
+ *
+ * @param obj the json_object instance
+ * @param new_value the value to be set
+ * @returns 1 if value is set correctly, 0 otherwise
+ */
+JSON_EXPORT int json_object_set_int(struct json_object *obj,int new_value);
+
+/** Increment a json_type_int object by the given amount, which may be negative.
+ *
+ * If the type of obj is not json_type_int then 0 is returned with no further
+ * action taken.
+ * If the addition would result in a overflow, the object value
+ * is set to INT64_MAX.
+ * If the addition would result in a underflow, the object value
+ * is set to INT64_MIN.
+ * Neither overflow nor underflow affect the return value.
+ *
+ * @param obj the json_object instance
+ * @param val the value to add
+ * @returns 1 if the increment succeded, 0 otherwise
+ */
+JSON_EXPORT int json_object_int_inc(struct json_object *obj, int64_t val);
+
+
+/** Get the int value of a json_object
+ *
+ * The type is coerced to a int64 if the passed object is not a int64.
+ * double objects will return their int64 conversion. Strings will be
+ * parsed as an int64. If no conversion exists then 0 is returned.
+ *
+ * NOTE: Set errno to 0 directly before a call to this function to determine
+ * whether or not conversion was successful (it does not clear the value for
+ * you).
+ *
+ * @param obj the json_object instance
+ * @returns an int64
+ */
+JSON_EXPORT int64_t json_object_get_int64(const struct json_object *obj);
+
+
+/** Set the int64_t value of a json_object
+ * 
+ * The type of obj is checked to be a json_type_int and 0 is returned 
+ * if it is not without any further actions. If type of obj is json_type_int
+ * the obect value is chaned to new_value
+ *
+ * @param obj the json_object instance
+ * @param new_value the value to be set
+ * @returns 1 if value is set correctly, 0 otherwise
+ */
+JSON_EXPORT int json_object_set_int64(struct json_object *obj,int64_t new_value);
+
+/* double type methods */
+
+/** Create a new empty json_object of type json_type_double
+ *
+ * @see json_object_double_to_json_string() for how to set a custom format string.
+ *
+ * @param d the double
+ * @returns a json_object of type json_type_double
+ */
+JSON_EXPORT struct json_object* json_object_new_double(double d);
+
+/**
+ * Create a new json_object of type json_type_double, using
+ * the exact serialized representation of the value.
+ *
+ * This allows for numbers that would otherwise get displayed
+ * inefficiently (e.g. 12.3 => "12.300000000000001") to be
+ * serialized with the more convenient form.
+ *
+ * Notes:
+ *
+ * This is used by json_tokener_parse_ex() to allow for
+ * an exact re-serialization of a parsed object.
+ *
+ * The userdata field is used to store the string representation, so it
+ * can't be used for other data if this function is used.
+ *
+ * An equivalent sequence of calls is:
+ * @code
+ *   jso = json_object_new_double(d);
+ *   json_object_set_serializer(jso, json_object_userdata_to_json_string,
+ *       strdup(ds), json_object_free_userdata);
+ * @endcode
+ *
+ * @param d the numeric value of the double.
+ * @param ds the string representation of the double.  This will be copied.
+ */
+JSON_EXPORT struct json_object* json_object_new_double_s(double d, const char *ds);
+
+/**
+ * Set a global or thread-local json-c option, depending on whether
+ *  JSON_C_OPTION_GLOBAL or JSON_C_OPTION_THREAD is passed.
+ * Thread-local options default to undefined, and inherit from the global
+ *  value, even if the global value is changed after the thread is created.
+ * Attempting to set thread-local options when threading is not compiled in
+ *  will result in an error.  Be sure to check the return value.
+ *
+ * double_format is a "%g" printf format, such as "%.20g"
+ *
+ * @return -1 on errors, 0 on success.
+ */
+int json_c_set_serialization_double_format(const char *double_format, int global_or_thread);
+
+
+
+/** Serialize a json_object of type json_type_double to a string.
+ *
+ * This function isn't meant to be called directly. Instead, you can set a
+ * custom format string for the serialization of this double using the
+ * following call (where "%.17g" actually is the default):
+ *
+ * @code
+ *   jso = json_object_new_double(d);
+ *   json_object_set_serializer(jso, json_object_double_to_json_string,
+ *       "%.17g", NULL);
+ * @endcode
+ *
+ * @see printf(3) man page for format strings
+ *
+ * @param jso The json_type_double object that is serialized.
+ * @param pb The destination buffer.
+ * @param level Ignored.
+ * @param flags Ignored.
+ */
+JSON_EXPORT int json_object_double_to_json_string(struct json_object* jso,
+					     struct printbuf *pb,
+					     int level,
+					     int flags);
+
+/** Get the double floating point value of a json_object
+ *
+ * The type is coerced to a double if the passed object is not a double.
+ * integer objects will return their double conversion. Strings will be
+ * parsed as a double. If no conversion exists then 0.0 is returned and
+ * errno is set to EINVAL. null is equivalent to 0 (no error values set)
+ *
+ * If the value is too big to fit in a double, then the value is set to
+ * the closest infinity with errno set to ERANGE. If strings cannot be
+ * converted to their double value, then EINVAL is set & NaN is returned.
+ *
+ * Arrays of length 0 are interpreted as 0 (with no error flags set).
+ * Arrays of length 1 are effectively cast to the equivalent object and
+ * converted using the above rules.  All other arrays set the error to
+ * EINVAL & return NaN.
+ *
+ * NOTE: Set errno to 0 directly before a call to this function to
+ * determine whether or not conversion was successful (it does not clear
+ * the value for you).
+ *
+ * @param obj the json_object instance
+ * @returns a double floating point number
+ */
+JSON_EXPORT double json_object_get_double(const struct json_object *obj);
+
+
+/** Set the double value of a json_object
+ * 
+ * The type of obj is checked to be a json_type_double and 0 is returned 
+ * if it is not without any further actions. If type of obj is json_type_double
+ * the obect value is chaned to new_value
+ *
+ * @param obj the json_object instance
+ * @param new_value the value to be set
+ * @returns 1 if value is set correctly, 0 otherwise
+ */
+JSON_EXPORT int json_object_set_double(struct json_object *obj,double new_value);
+
+
+
+/* string type methods */
+
+/** Create a new empty json_object of type json_type_string
+ *
+ * A copy of the string is made and the memory is managed by the json_object
+ *
+ * @param s the string
+ * @returns a json_object of type json_type_string
+ */
+JSON_EXPORT struct json_object* json_object_new_string(const char *s);
+
+JSON_EXPORT struct json_object* json_object_new_string_len(const char *s, int len);
+
+/** Get the string value of a json_object
+ *
+ * If the passed object is of type json_type_null (i.e. obj == NULL),
+ * NULL is returned.
+ *
+ * If the passed object of type json_type_string, the string contents
+ * are returned.
+ *
+ * Otherwise the JSON representation of the object is returned.
+ *
+ * The returned string memory is managed by the json_object and will
+ * be freed when the reference count of the json_object drops to zero.
+ *
+ * @param obj the json_object instance
+ * @returns a string or NULL
+ */
+JSON_EXPORT const char* json_object_get_string(struct json_object *obj);
+
+/** Get the string length of a json_object
+ *
+ * If the passed object is not of type json_type_string then zero
+ * will be returned.
+ *
+ * @param obj the json_object instance
+ * @returns int
+ */
+JSON_EXPORT int json_object_get_string_len(const struct json_object *obj);
+
+
+/** Set the string value of a json_object with zero terminated strings
+ * equivalent to json_object_set_string_len (obj, new_value, strlen(new_value))
+ * @returns 1 if value is set correctly, 0 otherwise
+ */
+JSON_EXPORT int json_object_set_string(json_object* obj, const char* new_value);
+
+/** Set the string value of a json_object str
+ * 
+ * The type of obj is checked to be a json_type_string and 0 is returned 
+ * if it is not without any further actions. If type of obj is json_type_string
+ * the obect value is chaned to new_value
+ *
+ * @param obj the json_object instance
+ * @param new_value the value to be set; Since string legth is given in len this need not be zero terminated
+ * @param len the length of new_value
+ * @returns 1 if value is set correctly, 0 otherwise
+ */
+JSON_EXPORT int json_object_set_string_len(json_object* obj, const char* new_value, int len);
+
+/** Check if two json_object's are equal
+ *
+ * If the passed objects are equal 1 will be returned.
+ * Equality is defined as follows:
+ * - json_objects of different types are never equal
+ * - json_objects of the same primitive type are equal if the
+ *   c-representation of their value is equal
+ * - json-arrays are considered equal if all values at the same
+ *   indices are equal (same order)
+ * - Complex json_objects are considered equal if all
+ *   contained objects referenced by their key are equal,
+ *   regardless their order.
+ *
+ * @param obj1 the first json_object instance
+ * @param obj2 the second json_object instance
+ * @returns whether both objects are equal or not
+ */
+JSON_EXPORT int json_object_equal(struct json_object *obj1,
+			     struct json_object *obj2);
+
+/**
+ * Perform a shallow copy of src into *dst as part of an overall json_object_deep_copy().
+ *
+ * If src is part of a containing object or array, parent will be non-NULL,
+ * and key or index will be provided.
+ * When shallow_copy is called *dst will be NULL, and must be non-NULL when it returns.
+ * src will never be NULL.
+ *
+ * If shallow_copy sets the serializer on an object, return 2 to indicate to 
+ *  json_object_deep_copy that it should not attempt to use the standard userdata
+ *  copy function.
+ *
+ * @return On success 1 or 2, -1 on errors
+ */
+typedef int (json_c_shallow_copy_fn)(json_object *src, json_object *parent, const char *key, size_t index, json_object **dst);
+
+/**
+ * The default shallow copy implementation for use with json_object_deep_copy().
+ * This simply calls the appropriate json_object_new_<type>() function and 
+ * copies over the serializer function (_to_json_string internal field of
+ * the json_object structure) but not any _userdata or _user_delete values.
+ *
+ * If you're writing a custom shallow_copy function, perhaps because you're using
+ * your own custom serializer, you can call this first to create the new object
+ * before customizing it with json_object_set_serializer().
+ *
+ * @return 1 on success, -1 on errors, but never 2.
+ */
+json_c_shallow_copy_fn json_c_shallow_copy_default;
+
+/**
+ * Copy the contents of the JSON object.
+ * The destination object must be initialized to NULL,
+ * to make sure this function won't overwrite an existing JSON object.
+ *
+ * This does roughly the same thing as
+ * `json_tokener_parse(json_object_get_string(src))`.
+ *
+ * @param src source JSON object whose contents will be copied
+ * @param dst pointer to the destination object where the contents of `src`;
+ *            make sure this pointer is initialized to NULL
+ * @param shallow_copy an optional function to copy individual objects, needed
+ *                     when custom serializers are in use.  See also
+ *                     json_object set_serializer.
+ *
+ * @returns 0 if the copy went well, -1 if an error occured during copy
+ *          or if the destination pointer is non-NULL
+ */
+
+JSON_EXPORT int json_object_deep_copy(struct json_object *src, struct json_object **dst, json_c_shallow_copy_fn *shallow_copy); 
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/third_party/json-c/json_object_iterator.c b/third_party/json-c/json_object_iterator.c
new file mode 100644
index 0000000000..f8d69ab368
--- /dev/null
+++ b/third_party/json-c/json_object_iterator.c
@@ -0,0 +1,163 @@
+/**
+*******************************************************************************
+* @file json_object_iterator.c
+*
+* Copyright (c) 2009-2012 Hewlett-Packard Development Company, L.P.
+*
+* This library is free software; you can redistribute it and/or modify
+* it under the terms of the MIT license. See COPYING for details.
+*
+*******************************************************************************
+*/
+
+#include <stddef.h>
+
+#include "json.h"
+#include "json_object_private.h"
+
+#include "json_object_iterator.h"
+
+/**
+ * How It Works
+ *
+ * For each JSON Object, json-c maintains a linked list of zero
+ * or more lh_entry (link-hash entry) structures inside the
+ * Object's link-hash table (lh_table).
+ *
+ * Each lh_entry structure on the JSON Object's linked list
+ * represents a single name/value pair.  The "next" field of the
+ * last lh_entry in the list is set to NULL, which terminates
+ * the list.
+ *
+ * We represent a valid iterator that refers to an actual
+ * name/value pair via a pointer to the pair's lh_entry
+ * structure set as the iterator's opaque_ field.
+ *
+ * We follow json-c's current pair list representation by
+ * representing a valid "end" iterator (one that refers past the
+ * last pair) with a NULL value in the iterator's opaque_ field.
+ *
+ * A JSON Object without any pairs in it will have the "head"
+ * field of its lh_table structure set to NULL.  For such an
+ * object, json_object_iter_begin will return an iterator with
+ * the opaque_ field set to NULL, which is equivalent to the
+ * "end" iterator.
+ *
+ * When iterating, we simply update the iterator's opaque_ field
+ * to point to the next lh_entry structure in the linked list.
+ * opaque_ will become NULL once we iterate past the last pair
+ * in the list, which makes the iterator equivalent to the "end"
+ * iterator.
+ */
+
+/// Our current representation of the "end" iterator;
+///
+/// @note May not always be NULL
+static const void* kObjectEndIterValue = NULL;
+
+/**
+ * ****************************************************************************
+ */
+struct json_object_iterator
+json_object_iter_begin(struct json_object* obj)
+{
+    struct json_object_iterator iter;
+    struct lh_table* pTable;
+
+    /// @note json_object_get_object will return NULL if passed NULL
+    ///       or a non-json_type_object instance
+    pTable = json_object_get_object(obj);
+    JASSERT(NULL != pTable);
+
+    /// @note For a pair-less Object, head is NULL, which matches our
+    ///       definition of the "end" iterator
+    iter.opaque_ = pTable->head;
+    return iter;
+}
+
+/**
+ * ****************************************************************************
+ */
+struct json_object_iterator
+json_object_iter_end(const struct json_object* obj)
+{
+    struct json_object_iterator iter;
+
+    JASSERT(NULL != obj);
+    JASSERT(json_object_is_type(obj, json_type_object));
+
+    iter.opaque_ = kObjectEndIterValue;
+
+    return iter;
+}
+
+/**
+ * ****************************************************************************
+ */
+void
+json_object_iter_next(struct json_object_iterator* iter)
+{
+    JASSERT(NULL != iter);
+    JASSERT(kObjectEndIterValue != iter->opaque_);
+
+    iter->opaque_ = ((const struct lh_entry *)iter->opaque_)->next;
+}
+
+
+/**
+ * ****************************************************************************
+ */
+const char*
+json_object_iter_peek_name(const struct json_object_iterator* iter)
+{
+    JASSERT(NULL != iter);
+    JASSERT(kObjectEndIterValue != iter->opaque_);
+
+    return (const char*)(((const struct lh_entry *)iter->opaque_)->k);
+}
+
+
+/**
+ * ****************************************************************************
+ */
+struct json_object*
+json_object_iter_peek_value(const struct json_object_iterator* iter)
+{
+    JASSERT(NULL != iter);
+    JASSERT(kObjectEndIterValue != iter->opaque_);
+
+    return (struct json_object*)lh_entry_v((const struct lh_entry *)iter->opaque_);
+}
+
+
+/**
+ * ****************************************************************************
+ */
+json_bool
+json_object_iter_equal(const struct json_object_iterator* iter1,
+                       const struct json_object_iterator* iter2)
+{
+    JASSERT(NULL != iter1);
+    JASSERT(NULL != iter2);
+
+    return (iter1->opaque_ == iter2->opaque_);
+}
+
+
+/**
+ * ****************************************************************************
+ */
+struct json_object_iterator
+json_object_iter_init_default(void)
+{
+    struct json_object_iterator iter;
+
+    /**
+     * @note Make this a negative, invalid value, such that
+     *       accidental access to it would likely be trapped by the
+     *       hardware as an invalid address.
+     */
+    iter.opaque_ = NULL;
+
+    return iter;
+}
diff --git a/third_party/json-c/json_object_iterator.h b/third_party/json-c/json_object_iterator.h
new file mode 100644
index 0000000000..f226cbd524
--- /dev/null
+++ b/third_party/json-c/json_object_iterator.h
@@ -0,0 +1,240 @@
+/**
+*******************************************************************************
+* @file json_object_iterator.h
+*
+* Copyright (c) 2009-2012 Hewlett-Packard Development Company, L.P.
+*
+* This library is free software; you can redistribute it and/or modify
+* it under the terms of the MIT license. See COPYING for details.
+*
+* @brief  An API for iterating over json_type_object objects,
+*         styled to be familiar to C++ programmers.
+*         Unlike json_object_object_foreach() and
+*         json_object_object_foreachC(), this avoids the need to expose
+*         json-c internals like lh_entry.
+*
+* API attributes: <br>
+*   * Thread-safe: NO<br>
+*   * Reentrant: NO
+*
+*******************************************************************************
+*/
+
+
+#ifndef JSON_OBJECT_ITERATOR_H
+#define JSON_OBJECT_ITERATOR_H
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Forward declaration for the opaque iterator information.
+ */
+struct json_object_iter_info_;
+
+/**
+ * The opaque iterator that references a name/value pair within
+ * a JSON Object instance or the "end" iterator value.
+ */
+struct json_object_iterator {
+    const void* opaque_;
+};
+
+
+/**
+ * forward declaration of json-c's JSON value instance structure
+ */
+struct json_object;
+
+
+/**
+ * Initializes an iterator structure to a "default" value that
+ * is convenient for initializing an iterator variable to a
+ * default state (e.g., initialization list in a class'
+ * constructor).
+ *
+ * @code
+ * struct json_object_iterator iter = json_object_iter_init_default();
+ * MyClass() : iter_(json_object_iter_init_default())
+ * @endcode
+ *
+ * @note The initialized value doesn't reference any specific
+ *       pair, is considered an invalid iterator, and MUST NOT
+ *       be passed to any json-c API that expects a valid
+ *       iterator.
+ *
+ * @note User and internal code MUST NOT make any assumptions
+ *       about and dependencies on the value of the "default"
+ *       iterator value.
+ *
+ * @return json_object_iterator
+ */
+struct json_object_iterator
+json_object_iter_init_default(void);
+
+/** Retrieves an iterator to the first pair of the JSON Object.
+ *
+ * @warning 	Any modification of the underlying pair invalidates all
+ * 		iterators to that pair.
+ *
+ * @param obj	JSON Object instance (MUST be of type json_object)
+ *
+ * @return json_object_iterator If the JSON Object has at
+ *              least one pair, on return, the iterator refers
+ *              to the first pair. If the JSON Object doesn't
+ *              have any pairs, the returned iterator is
+ *              equivalent to the "end" iterator for the same
+ *              JSON Object instance.
+ *
+ * @code
+ * struct json_object_iterator it;
+ * struct json_object_iterator itEnd;
+ * struct json_object* obj;
+ *
+ * obj = json_tokener_parse("{'first':'george', 'age':100}");
+ * it = json_object_iter_begin(obj);
+ * itEnd = json_object_iter_end(obj);
+ *
+ * while (!json_object_iter_equal(&it, &itEnd)) {
+ *     printf("%s\n",
+ *            json_object_iter_peek_name(&it));
+ *     json_object_iter_next(&it);
+ * }
+ *
+ * @endcode
+ */
+struct json_object_iterator
+json_object_iter_begin(struct json_object* obj);
+
+/** Retrieves the iterator that represents the position beyond the
+ *  last pair of the given JSON Object instance.
+ *
+ *  @warning Do NOT write code that assumes that the "end"
+ *        iterator value is NULL, even if it is so in a
+ *        particular instance of the implementation.
+ *
+ *  @note The reason we do not (and MUST NOT) provide
+ *        "json_object_iter_is_end(json_object_iterator* iter)"
+ *        type of API is because it would limit the underlying
+ *        representation of name/value containment (or force us
+ *        to add additional, otherwise unnecessary, fields to
+ *        the iterator structure). The "end" iterator and the
+ *        equality test method, on the other hand, permit us to
+ *        cleanly abstract pretty much any reasonable underlying
+ *        representation without burdening the iterator
+ *        structure with unnecessary data.
+ *
+ *  @note For performance reasons, memorize the "end" iterator prior
+ *        to any loop.
+ *
+ * @param obj JSON Object instance (MUST be of type json_object)
+ *
+ * @return json_object_iterator On return, the iterator refers
+ *              to the "end" of the Object instance's pairs
+ *              (i.e., NOT the last pair, but "beyond the last
+ *              pair" value)
+ */
+struct json_object_iterator
+json_object_iter_end(const struct json_object* obj);
+
+/** Returns an iterator to the next pair, if any
+ *
+ * @warning	Any modification of the underlying pair
+ *       	invalidates all iterators to that pair.
+ *
+ * @param iter [IN/OUT] Pointer to iterator that references a
+ *         name/value pair; MUST be a valid, non-end iterator.
+ *         WARNING: bad things will happen if invalid or "end"
+ *         iterator is passed. Upon return will contain the
+ *         reference to the next pair if there is one; if there
+ *         are no more pairs, will contain the "end" iterator
+ *         value, which may be compared against the return value
+ *         of json_object_iter_end() for the same JSON Object
+ *         instance.
+ */
+void
+json_object_iter_next(struct json_object_iterator* iter);
+
+
+/** Returns a const pointer to the name of the pair referenced
+ *  by the given iterator.
+ *
+ * @param iter pointer to iterator that references a name/value
+ *             pair; MUST be a valid, non-end iterator.
+ *
+ * @warning	bad things will happen if an invalid or
+ *             	"end" iterator is passed.
+ *
+ * @return const char* Pointer to the name of the referenced
+ *         name/value pair.  The name memory belongs to the
+ *         name/value pair, will be freed when the pair is
+ *         deleted or modified, and MUST NOT be modified or
+ *         freed by the user.
+ */
+const char*
+json_object_iter_peek_name(const struct json_object_iterator* iter);
+
+
+/** Returns a pointer to the json-c instance representing the
+ *  value of the referenced name/value pair, without altering
+ *  the instance's reference count.
+ *
+ * @param iter 	pointer to iterator that references a name/value
+ *             	pair; MUST be a valid, non-end iterator.
+ *
+ * @warning	bad things will happen if invalid or
+ *             "end" iterator is passed.
+ *
+ * @return struct json_object* Pointer to the json-c value
+ *         instance of the referenced name/value pair;  the
+ *         value's reference count is not changed by this
+ *         function: if you plan to hold on to this json-c node,
+ *         take a look at json_object_get() and
+ *         json_object_put(). IMPORTANT: json-c API represents
+ *         the JSON Null value as a NULL json_object instance
+ *         pointer.
+ */
+struct json_object*
+json_object_iter_peek_value(const struct json_object_iterator* iter);
+
+
+/** Tests two iterators for equality.  Typically used to test
+ *  for end of iteration by comparing an iterator to the
+ *  corresponding "end" iterator (that was derived from the same
+ *  JSON Object instance).
+ *
+ *  @note The reason we do not (and MUST NOT) provide
+ *        "json_object_iter_is_end(json_object_iterator* iter)"
+ *        type of API is because it would limit the underlying
+ *        representation of name/value containment (or force us
+ *        to add additional, otherwise unnecessary, fields to
+ *        the iterator structure). The equality test method, on
+ *        the other hand, permits us to cleanly abstract pretty
+ *        much any reasonable underlying representation.
+ *
+ * @param iter1 Pointer to first valid, non-NULL iterator
+ * @param iter2 POinter to second valid, non-NULL iterator
+ *
+ * @warning	if a NULL iterator pointer or an uninitialized
+ *       	or invalid iterator, or iterators derived from
+ *       	different JSON Object instances are passed, bad things
+ *       	will happen!
+ *
+ * @return json_bool non-zero if iterators are equal (i.e., both
+ *         reference the same name/value pair or are both at
+ *         "end"); zero if they are not equal.
+ */
+json_bool
+json_object_iter_equal(const struct json_object_iterator* iter1,
+                       const struct json_object_iterator* iter2);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* JSON_OBJECT_ITERATOR_H */
diff --git a/third_party/json-c/json_object_private.h b/third_party/json-c/json_object_private.h
new file mode 100644
index 0000000000..53be70db08
--- /dev/null
+++ b/third_party/json-c/json_object_private.h
@@ -0,0 +1,64 @@
+/*
+ * $Id: json_object_private.h,v 1.4 2006/01/26 02:16:28 mclark Exp $
+ *
+ * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+/**
+ * @file
+ * @brief Do not use, json-c internal, may be changed or removed at any time.
+ */
+#ifndef _json_object_private_h_
+#define _json_object_private_h_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define LEN_DIRECT_STRING_DATA 32 /**< how many bytes are directly stored in json_object for strings? */
+
+typedef void (json_object_private_delete_fn)(struct json_object *o);
+
+struct json_object
+{
+  enum json_type o_type;
+  json_object_private_delete_fn *_delete;
+  json_object_to_json_string_fn *_to_json_string;
+  int _ref_count;
+  struct printbuf *_pb;
+  union data {
+    json_bool c_boolean;
+    double c_double;
+    int64_t c_int64;
+    struct lh_table *c_object;
+    struct array_list *c_array;
+    struct {
+	union {
+		/* optimize: if we have small strings, we can store them
+		 * directly. This saves considerable CPU cycles AND memory.
+		 */
+		char *ptr;
+		char data[LEN_DIRECT_STRING_DATA];
+	} str;
+        int len;
+    } c_string;
+  } o;
+  json_object_delete_fn *_user_delete;
+  void *_userdata;
+};
+
+void _json_c_set_last_err(const char *err_fmt, ...);
+
+extern const char *json_number_chars;
+extern const char *json_hex_chars;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/third_party/json-c/json_pointer.c b/third_party/json-c/json_pointer.c
new file mode 100644
index 0000000000..2b2a9ef507
--- /dev/null
+++ b/third_party/json-c/json_pointer.c
@@ -0,0 +1,327 @@
+/*
+ * Copyright (c) 2016 Alexandru Ardelean.
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+#include "config.h"
+
+#include "strerror_override.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+#include "json_pointer.h"
+#include "strdup_compat.h"
+#include "vasprintf_compat.h"
+
+/**
+ * JavaScript Object Notation (JSON) Pointer
+ *   RFC 6901 - https://tools.ietf.org/html/rfc6901
+ */
+
+static void string_replace_all_occurrences_with_char(char *s, const char *occur, char repl_char)
+{
+	int slen = strlen(s);
+	int skip = strlen(occur) - 1; /* length of the occurence, minus the char we're replacing */
+	char *p = s;
+	while ((p = strstr(p, occur))) {
+		*p = repl_char;
+		p++;
+		slen -= skip;
+		memmove(p, (p + skip), slen - (p - s) + 1); /* includes null char too */
+	}
+}
+
+static int is_valid_index(struct json_object *jo, const char *path, int32_t *idx)
+{
+	int i, len = strlen(path);
+	/* this code-path optimizes a bit, for when we reference the 0-9 index range in a JSON array
+	   and because leading zeros not allowed */
+	if (len == 1) {
+		if (isdigit((int)path[0])) {
+			*idx = (path[0] - '0');
+			goto check_oob;
+		}
+		errno = EINVAL;
+		return 0;
+	}
+	/* leading zeros not allowed per RFC */
+	if (path[0] == '0') {
+		errno = EINVAL;
+		return 0;
+	}
+	/* RFC states base-10 decimals */
+	for (i = 0; i < len; i++) {
+		if (!isdigit((int)path[i])) {
+			errno = EINVAL;
+			return 0;
+		}
+	}
+
+	*idx = strtol(path, NULL, 10);
+	if (*idx < 0) {
+		errno = EINVAL;
+		return 0;
+	}
+check_oob:
+	len = json_object_array_length(jo);
+	if (*idx >= len) {
+		errno = ENOENT;
+		return 0;
+	}
+
+	return 1;
+}
+
+static int json_pointer_get_single_path(struct json_object *obj, char *path, struct json_object **value)
+{
+	if (json_object_is_type(obj, json_type_array)) {
+		int32_t idx;
+		if (!is_valid_index(obj, path, &idx))
+			return -1;
+		obj = json_object_array_get_idx(obj, idx);
+		if (obj) {
+			if (value)
+				*value = obj;
+			return 0;
+		}
+		/* Entry not found */
+		errno = ENOENT;
+		return -1;
+	}
+
+	/* RFC states that we first must eval all ~1 then all ~0 */
+	string_replace_all_occurrences_with_char(path, "~1", '/');
+	string_replace_all_occurrences_with_char(path, "~0", '~');
+
+	if (!json_object_object_get_ex(obj, path, value)) {
+		errno = ENOENT;
+		return -1;
+	}
+
+	return 0;
+}
+
+static int json_pointer_set_single_path(
+	struct json_object *parent,
+	const char *path,
+	struct json_object *value)
+{
+	if (json_object_is_type(parent, json_type_array)) {
+		int32_t idx;
+		/* RFC (Chapter 4) states that '-' may be used to add new elements to an array */
+		if (path[0] == '-' && path[1] == '\0')
+			return json_object_array_add(parent, value);
+		if (!is_valid_index(parent, path, &idx))
+			return -1;
+		return json_object_array_put_idx(parent, idx, value);
+	}
+
+	/* path replacements should have been done in json_pointer_get_single_path(),
+	   and we should still be good here */
+	if (json_object_is_type(parent, json_type_object))
+		return json_object_object_add(parent, path, value);
+
+	/* Getting here means that we tried to "dereference" a primitive JSON type (like string, int, bool).
+	   i.e. add a sub-object to it */
+	errno = ENOENT;
+	return -1;
+}
+
+static int json_pointer_get_recursive(
+	struct json_object *obj,
+	char *path,
+	struct json_object **value)
+{
+	char *endp;
+	int rc;
+
+	/* All paths (on each recursion level must have a leading '/' */
+	if (path[0] != '/') {
+		errno = EINVAL;
+		return -1;
+	}
+	path++;
+
+	endp = strchr(path, '/');
+	if (endp)
+		*endp = '\0';
+
+	/* If we err-ed here, return here */
+	if ((rc = json_pointer_get_single_path(obj, path, &obj)))
+		return rc;
+
+	if (endp) {
+		*endp = '/'; /* Put the slash back, so that the sanity check passes on next recursion level */
+		return json_pointer_get_recursive(obj, endp, value);
+	}
+
+	/* We should be at the end of the recursion here */
+	if (value)
+		*value = obj;
+
+	return 0;
+}
+
+int json_pointer_get(struct json_object *obj, const char *path, struct json_object **res)
+{
+	char *path_copy = NULL;
+	int rc;
+
+	if (!obj || !path) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	if (path[0] == '\0') {
+		if (res)
+			*res = obj;
+		return 0;
+	}
+
+	/* pass a working copy to the recursive call */
+	if (!(path_copy = strdup(path))) {
+		errno = ENOMEM;
+		return -1;
+	}
+	rc = json_pointer_get_recursive(obj, path_copy, res);
+	free(path_copy);
+
+	return rc;
+}
+
+int json_pointer_getf(struct json_object *obj, struct json_object **res, const char *path_fmt, ...)
+{
+	char *path_copy = NULL;
+	int rc = 0;
+	va_list args;
+
+	if (!obj || !path_fmt) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	va_start(args, path_fmt);
+	rc = vasprintf(&path_copy, path_fmt, args);
+	va_end(args);
+
+	if (rc < 0)
+		return rc;
+
+	if (path_copy[0] == '\0') {
+		if (res)
+			*res = obj;
+		goto out;
+	}
+
+	rc = json_pointer_get_recursive(obj, path_copy, res);
+out:
+	free(path_copy);
+
+	return rc;
+}
+
+int json_pointer_set(struct json_object **obj, const char *path, struct json_object *value)
+{
+	const char *endp;
+	char *path_copy = NULL;
+	struct json_object *set = NULL;
+	int rc;
+
+	if (!obj || !path) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	if (path[0] == '\0') {
+		json_object_put(*obj);
+		*obj = value;
+		return 0;
+	}
+
+	if (path[0] != '/') {
+		errno = EINVAL;
+		return -1;
+	}
+
+	/* If there's only 1 level to set, stop here */
+	if ((endp = strrchr(path, '/')) == path) {
+		path++;
+		return json_pointer_set_single_path(*obj, path, value);
+	}
+
+	/* pass a working copy to the recursive call */
+	if (!(path_copy = strdup(path))) {
+		errno = ENOMEM;
+		return -1;
+	}
+	path_copy[endp - path] = '\0';
+	rc = json_pointer_get_recursive(*obj, path_copy, &set);
+	free(path_copy);
+
+	if (rc)
+		return rc;
+
+	endp++;
+	return json_pointer_set_single_path(set, endp, value);
+}
+
+int json_pointer_setf(struct json_object **obj, struct json_object *value, const char *path_fmt, ...)
+{
+	char *endp;
+	char *path_copy = NULL;
+	struct json_object *set = NULL;
+	va_list args;
+	int rc = 0;
+
+	if (!obj || !path_fmt) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	/* pass a working copy to the recursive call */
+	va_start(args, path_fmt);
+	rc = vasprintf(&path_copy, path_fmt, args);
+	va_end(args);
+
+	if (rc < 0)
+		return rc;
+
+	if (path_copy[0] == '\0') {
+		json_object_put(*obj);
+		*obj = value;
+		goto out;
+	}
+
+	if (path_copy[0] != '/') {
+		errno = EINVAL;
+		rc = -1;
+		goto out;
+	}
+
+	/* If there's only 1 level to set, stop here */
+	if ((endp = strrchr(path_copy, '/')) == path_copy) {
+		set = *obj;
+		goto set_single_path;
+	}
+
+	*endp = '\0';
+	rc = json_pointer_get_recursive(*obj, path_copy, &set);
+
+	if (rc)
+		goto out;
+
+set_single_path:
+	endp++;
+	rc = json_pointer_set_single_path(set, endp, value);
+out:
+	free(path_copy);
+	return rc;
+}
+
diff --git a/third_party/json-c/json_pointer.h b/third_party/json-c/json_pointer.h
new file mode 100644
index 0000000000..b8746c0c97
--- /dev/null
+++ b/third_party/json-c/json_pointer.h
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2016 Alexadru Ardelean.
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+/**
+ * @file
+ * @brief JSON Pointer (RFC 6901) implementation for retrieving
+ *        objects from a json-c object tree.
+ */
+#ifndef _json_pointer_h_
+#define _json_pointer_h_
+
+#include "json_object.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Retrieves a JSON sub-object from inside another JSON object
+ * using the JSON pointer notation as defined in RFC 6901
+ *   https://tools.ietf.org/html/rfc6901
+ *
+ * The returned JSON sub-object is equivalent to parsing manually the
+ * 'obj' JSON tree ; i.e. it's not a new object that is created, but rather
+ * a pointer inside the JSON tree.
+ *
+ * Internally, this is equivalent to doing a series of 'json_object_object_get()'
+ * and 'json_object_array_get_idx()' along the given 'path'.
+ *
+ * Note that the 'path' string supports 'printf()' type arguments, so, whatever
+ * is added after the 'res' param will be treated as an argument for 'path'
+ * Example: json_pointer_get(obj, "/foo/%d/%s", &res, 0, bar)
+ * This means, that you need to escape '%' with '%%' (just like in printf())
+ *
+ * @param obj the json_object instance/tree from where to retrieve sub-objects
+ * @param path a (RFC6901) string notation for the sub-object to retrieve
+ * @param res a pointer where to store a reference to the json_object
+ *              associated with the given path
+ *
+ * @return negative if an error (or not found), or 0 if succeeded
+ */
+int json_pointer_get(struct json_object *obj, const char *path, struct json_object **res);
+
+/**
+ * This is a variant of 'json_pointer_get()' that supports printf() style arguments.
+ *
+ * Example: json_pointer_getf(obj, res, "/foo/%d/%s", 0, bak)
+ * This also means that you need to escape '%' with '%%' (just like in printf())
+ *
+ * Please take into consideration all recommended 'printf()' format security
+ * aspects when using this function.
+ *
+ * @param obj the json_object instance/tree to which to add a sub-object
+ * @param res a pointer where to store a reference to the json_object
+ *              associated with the given path
+ * @param path_fmt a printf() style format for the path
+ *
+ * @return negative if an error (or not found), or 0 if succeeded
+ */
+int json_pointer_getf(struct json_object *obj, struct json_object **res, const char *path_fmt, ...);
+
+/**
+ * Sets JSON object 'value' in the 'obj' tree at the location specified
+ * by the 'path'. 'path' is JSON pointer notation as defined in RFC 6901
+ *   https://tools.ietf.org/html/rfc6901
+ *
+ * Note that 'obj' is a double pointer, mostly for the "" (empty string)
+ * case, where the entire JSON object would be replaced by 'value'.
+ * In the case of the "" path, the object at '*obj' will have it's refcount
+ * decremented with 'json_object_put()' and the 'value' object will be assigned to it.
+ *
+ * For other cases (JSON sub-objects) ownership of 'value' will be transferred into
+ * '*obj' via 'json_object_object_add()' & 'json_object_array_put_idx()', so the
+ * only time the refcount should be decremented for 'value' is when the return value of
+ * 'json_pointer_set()' is negative (meaning the 'value' object did not get set into '*obj').
+ *
+ * That also implies that 'json_pointer_set()' does not do any refcount incrementing.
+ * (Just that single decrement that was mentioned above).
+ *
+ * Note that the 'path' string supports 'printf()' type arguments, so, whatever
+ * is added after the 'value' param will be treated as an argument for 'path'
+ * Example: json_pointer_set(obj, "/foo/%d/%s", value, 0, bak)
+ * This means, that you need to escape '%' with '%%' (just like in printf())
+ *
+ * @param obj the json_object instance/tree to which to add a sub-object
+ * @param path a (RFC6901) string notation for the sub-object to set in the tree
+ * @param value object to set at path
+ *
+ * @return negative if an error (or not found), or 0 if succeeded
+ */
+int json_pointer_set(struct json_object **obj, const char *path, struct json_object *value);
+
+/**
+ * This is a variant of 'json_pointer_set()' that supports printf() style arguments.
+ *
+ * Example: json_pointer_setf(obj, value, "/foo/%d/%s", 0, bak)
+ * This also means that you need to escape '%' with '%%' (just like in printf())
+ *
+ * Please take into consideration all recommended 'printf()' format security
+ * aspects when using this function.
+ *
+ * @param obj the json_object instance/tree to which to add a sub-object
+ * @param value object to set at path
+ * @param path_fmt a printf() style format for the path
+ *
+ * @return negative if an error (or not found), or 0 if succeeded
+ */
+int json_pointer_setf(struct json_object **obj, struct json_object *value, const char *path_fmt, ...);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/third_party/json-c/json_tokener.c b/third_party/json-c/json_tokener.c
new file mode 100644
index 0000000000..449a82da6f
--- /dev/null
+++ b/third_party/json-c/json_tokener.c
@@ -0,0 +1,997 @@
+/*
+ * $Id: json_tokener.c,v 1.20 2006/07/25 03:24:50 mclark Exp $
+ *
+ * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ *
+ * Copyright (c) 2008-2009 Yahoo! Inc.  All rights reserved.
+ * The copyrights to the contents of this file are licensed under the MIT License
+ * (http://www.opensource.org/licenses/mit-license.php)
+ */
+
+#include "config.h"
+
+#include <math.h>
+#include "math_compat.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <ctype.h>
+#include <string.h>
+#include <limits.h>
+
+#include "debug.h"
+#include "printbuf.h"
+#include "arraylist.h"
+#include "json_inttypes.h"
+#include "json_object.h"
+#include "json_object_private.h"
+#include "json_tokener.h"
+#include "json_util.h"
+#include "strdup_compat.h"
+
+#ifdef HAVE_LOCALE_H
+#include <locale.h>
+#endif /* HAVE_LOCALE_H */
+#ifdef HAVE_XLOCALE_H
+#include <xlocale.h>
+#endif
+
+#define jt_hexdigit(x) (((x) <= '9') ? (x) - '0' : ((x) & 7) + 9)
+
+#if !HAVE_STRNCASECMP && defined(_MSC_VER)
+  /* MSC has the version as _strnicmp */
+# define strncasecmp _strnicmp
+#elif !HAVE_STRNCASECMP
+# error You do not have strncasecmp on your system.
+#endif /* HAVE_STRNCASECMP */
+
+/* Use C99 NAN by default; if not available, nan("") should work too. */
+#ifndef NAN
+#define NAN nan("")
+#endif /* !NAN */
+
+static const char json_null_str[] = "null";
+static const int json_null_str_len = sizeof(json_null_str) - 1;
+static const char json_inf_str[] = "Infinity";
+static const char json_inf_str_lower[] = "infinity";
+static const unsigned int json_inf_str_len = sizeof(json_inf_str) - 1;
+static const char json_nan_str[] = "NaN";
+static const int json_nan_str_len = sizeof(json_nan_str) - 1;
+static const char json_true_str[] = "true";
+static const int json_true_str_len = sizeof(json_true_str) - 1;
+static const char json_false_str[] = "false";
+static const int json_false_str_len = sizeof(json_false_str) - 1;
+
+static const char* json_tokener_errors[] = {
+  "success",
+  "continue",
+  "nesting too deep",
+  "unexpected end of data",
+  "unexpected character",
+  "null expected",
+  "boolean expected",
+  "number expected",
+  "array value separator ',' expected",
+  "quoted object property name expected",
+  "object property name separator ':' expected",
+  "object value separator ',' expected",
+  "invalid string sequence",
+  "expected comment",
+  "buffer size overflow"
+};
+
+const char *json_tokener_error_desc(enum json_tokener_error jerr)
+{
+	int jerr_int = (int) jerr;
+	if (jerr_int < 0 ||
+	    jerr_int >= (int)(sizeof(json_tokener_errors) / sizeof(json_tokener_errors[0])))
+		return "Unknown error, "
+		       "invalid json_tokener_error value passed to json_tokener_error_desc()";
+	return json_tokener_errors[jerr];
+}
+
+enum json_tokener_error json_tokener_get_error(struct json_tokener *tok)
+{
+	return tok->err;
+}
+
+/* Stuff for decoding unicode sequences */
+#define IS_HIGH_SURROGATE(uc) (((uc) & 0xFC00) == 0xD800)
+#define IS_LOW_SURROGATE(uc)  (((uc) & 0xFC00) == 0xDC00)
+#define DECODE_SURROGATE_PAIR(hi,lo) ((((hi) & 0x3FF) << 10) + ((lo) & 0x3FF) + 0x10000)
+static unsigned char utf8_replacement_char[3] = { 0xEF, 0xBF, 0xBD };
+
+struct json_tokener* json_tokener_new_ex(int depth)
+{
+  struct json_tokener *tok;
+
+  tok = (struct json_tokener*)calloc(1, sizeof(struct json_tokener));
+  if (!tok) return NULL;
+  tok->stack = (struct json_tokener_srec *) calloc(depth,
+						   sizeof(struct json_tokener_srec));
+  if (!tok->stack) {
+    free(tok);
+    return NULL;
+  }
+  tok->pb = printbuf_new();
+  tok->max_depth = depth;
+  json_tokener_reset(tok);
+  return tok;
+}
+
+struct json_tokener* json_tokener_new(void)
+{
+  return json_tokener_new_ex(JSON_TOKENER_DEFAULT_DEPTH);
+}
+
+void json_tokener_free(struct json_tokener *tok)
+{
+  json_tokener_reset(tok);
+  if (tok->pb) printbuf_free(tok->pb);
+  free(tok->stack);
+  free(tok);
+}
+
+static void json_tokener_reset_level(struct json_tokener *tok, int depth)
+{
+  tok->stack[depth].state = json_tokener_state_eatws;
+  tok->stack[depth].saved_state = json_tokener_state_start;
+  json_object_put(tok->stack[depth].current);
+  tok->stack[depth].current = NULL;
+  free(tok->stack[depth].obj_field_name);
+  tok->stack[depth].obj_field_name = NULL;
+}
+
+void json_tokener_reset(struct json_tokener *tok)
+{
+  int i;
+  if (!tok)
+    return;
+
+  for(i = tok->depth; i >= 0; i--)
+    json_tokener_reset_level(tok, i);
+  tok->depth = 0;
+  tok->err = json_tokener_success;
+}
+
+struct json_object* json_tokener_parse(const char *str)
+{
+    enum json_tokener_error jerr_ignored;
+    struct json_object* obj;
+    obj = json_tokener_parse_verbose(str, &jerr_ignored);
+    return obj;
+}
+
+struct json_object* json_tokener_parse_verbose(const char *str,
+					       enum json_tokener_error *error)
+{
+    struct json_tokener* tok;
+    struct json_object* obj;
+
+    tok = json_tokener_new();
+    if (!tok)
+      return NULL;
+    obj = json_tokener_parse_ex(tok, str, -1);
+    *error = tok->err;
+    if(tok->err != json_tokener_success) {
+		if (obj != NULL)
+			json_object_put(obj);
+        obj = NULL;
+    }
+
+    json_tokener_free(tok);
+    return obj;
+}
+
+#define state  tok->stack[tok->depth].state
+#define saved_state  tok->stack[tok->depth].saved_state
+#define current tok->stack[tok->depth].current
+#define obj_field_name tok->stack[tok->depth].obj_field_name
+
+/* Optimization:
+ * json_tokener_parse_ex() consumed a lot of CPU in its main loop,
+ * iterating character-by character.  A large performance boost is
+ * achieved by using tighter loops to locally handle units such as
+ * comments and strings.  Loops that handle an entire token within
+ * their scope also gather entire strings and pass them to
+ * printbuf_memappend() in a single call, rather than calling
+ * printbuf_memappend() one char at a time.
+ *
+ * PEEK_CHAR() and ADVANCE_CHAR() macros are used for code that is
+ * common to both the main loop and the tighter loops.
+ */
+
+/* PEEK_CHAR(dest, tok) macro:
+ *   Peeks at the current char and stores it in dest.
+ *   Returns 1 on success, sets tok->err and returns 0 if no more chars.
+ *   Implicit inputs:  str, len vars
+ */
+#define PEEK_CHAR(dest, tok)			\
+  (((tok)->char_offset == len) ?		\
+   (((tok)->depth == 0 &&			\
+     state == json_tokener_state_eatws &&	\
+     saved_state == json_tokener_state_finish	\
+     ) ?					\
+    (((tok)->err = json_tokener_success), 0)	\
+    :						\
+    (((tok)->err = json_tokener_continue), 0)	\
+    ) :						\
+   (((dest) = *str), 1)				\
+   )
+
+/* ADVANCE_CHAR() macro:
+ *   Incrementes str & tok->char_offset.
+ *   For convenience of existing conditionals, returns the old value of c (0 on eof)
+ *   Implicit inputs:  c var
+ */
+#define ADVANCE_CHAR(str, tok) \
+  ( ++(str), ((tok)->char_offset)++, c)
+
+
+/* End optimization macro defs */
+
+
+struct json_object* json_tokener_parse_ex(struct json_tokener *tok,
+					  const char *str, int len)
+{
+  struct json_object *obj = NULL;
+  char c = '\1';
+#ifdef HAVE_USELOCALE
+  locale_t oldlocale = uselocale(NULL);
+  locale_t newloc;
+#elif defined(HAVE_SETLOCALE)
+  char *oldlocale = NULL;
+#endif
+
+  tok->char_offset = 0;
+  tok->err = json_tokener_success;
+
+  /* this interface is presently not 64-bit clean due to the int len argument
+     and the internal printbuf interface that takes 32-bit int len arguments
+     so the function limits the maximum string size to INT32_MAX (2GB).
+     If the function is called with len == -1 then strlen is called to check
+     the string length is less than INT32_MAX (2GB) */
+  if ((len < -1) || (len == -1 && strlen(str) > INT32_MAX)) {
+    tok->err = json_tokener_error_size;
+    return NULL;
+  }
+
+#ifdef HAVE_USELOCALE
+  {
+    locale_t duploc = duplocale(oldlocale);
+    newloc = newlocale(LC_NUMERIC, "C", duploc);
+    // XXX at least Debian 8.4 has a bug in newlocale where it doesn't
+    //  change the decimal separator unless you set LC_TIME!
+    if (newloc)
+    {
+      duploc = newloc; // original duploc has been freed by newlocale()
+      newloc = newlocale(LC_TIME, "C", duploc);
+    }
+    if (newloc == NULL)
+    {
+      freelocale(duploc);
+      return NULL;
+    }
+    uselocale(newloc);
+  }
+#elif defined(HAVE_SETLOCALE)
+  {
+    char *tmplocale;
+    tmplocale = setlocale(LC_NUMERIC, NULL);
+    if (tmplocale) oldlocale = strdup(tmplocale);
+    setlocale(LC_NUMERIC, "C");
+  }
+#endif
+
+  while (PEEK_CHAR(c, tok)) {
+
+  redo_char:
+    switch(state) {
+
+    case json_tokener_state_eatws:
+      /* Advance until we change state */
+      while (isspace((int)c)) {
+	if ((!ADVANCE_CHAR(str, tok)) || (!PEEK_CHAR(c, tok)))
+	  goto out;
+      }
+      if(c == '/' && !(tok->flags & JSON_TOKENER_STRICT)) {
+	printbuf_reset(tok->pb);
+	printbuf_memappend_fast(tok->pb, &c, 1);
+	state = json_tokener_state_comment_start;
+      } else {
+	state = saved_state;
+	goto redo_char;
+      }
+      break;
+
+    case json_tokener_state_start:
+      switch(c) {
+      case '{':
+	state = json_tokener_state_eatws;
+	saved_state = json_tokener_state_object_field_start;
+	current = json_object_new_object();
+	if(current == NULL)
+		goto out;
+	break;
+      case '[':
+	state = json_tokener_state_eatws;
+	saved_state = json_tokener_state_array;
+	current = json_object_new_array();
+	if(current == NULL)
+		goto out;
+	break;
+      case 'I':
+      case 'i':
+	state = json_tokener_state_inf;
+	printbuf_reset(tok->pb);
+	tok->st_pos = 0;
+	goto redo_char;
+      case 'N':
+      case 'n':
+	state = json_tokener_state_null; // or NaN
+	printbuf_reset(tok->pb);
+	tok->st_pos = 0;
+	goto redo_char;
+      case '\'':
+        if (tok->flags & JSON_TOKENER_STRICT) {
+            /* in STRICT mode only double-quote are allowed */
+            tok->err = json_tokener_error_parse_unexpected;
+            goto out;
+        }
+	/* FALLTHRU */
+      case '"':
+	state = json_tokener_state_string;
+	printbuf_reset(tok->pb);
+	tok->quote_char = c;
+	break;
+      case 'T':
+      case 't':
+      case 'F':
+      case 'f':
+	state = json_tokener_state_boolean;
+	printbuf_reset(tok->pb);
+	tok->st_pos = 0;
+	goto redo_char;
+      case '0':
+      case '1':
+      case '2':
+      case '3':
+      case '4':
+      case '5':
+      case '6':
+      case '7':
+      case '8':
+      case '9':
+      case '-':
+	state = json_tokener_state_number;
+	printbuf_reset(tok->pb);
+	tok->is_double = 0;
+	goto redo_char;
+      default:
+	tok->err = json_tokener_error_parse_unexpected;
+	goto out;
+      }
+      break;
+
+    case json_tokener_state_finish:
+      if(tok->depth == 0) goto out;
+      obj = json_object_get(current);
+      json_tokener_reset_level(tok, tok->depth);
+      tok->depth--;
+      goto redo_char;
+
+    case json_tokener_state_inf: /* aka starts with 'i' (or 'I', or "-i", or "-I") */
+      {
+	/* If we were guaranteed to have len set, then we could (usually) handle
+	 * the entire "Infinity" check in a single strncmp (strncasecmp), but
+	 * since len might be -1 (i.e. "read until \0"), we need to check it
+	 * a character at a time.
+	 * Trying to handle it both ways would make this code considerably more
+	 * complicated with likely little performance benefit.
+	 */
+	int is_negative = 0;
+	const char *_json_inf_str = json_inf_str;
+	if (!(tok->flags & JSON_TOKENER_STRICT))
+		_json_inf_str = json_inf_str_lower;
+
+	/* Note: tok->st_pos must be 0 when state is set to json_tokener_state_inf */
+	while (tok->st_pos < (int)json_inf_str_len)
+	{
+		char inf_char = *str;
+		if (!(tok->flags & JSON_TOKENER_STRICT))
+			inf_char = tolower((int)*str);
+		if (inf_char != _json_inf_str[tok->st_pos])
+		{
+			tok->err = json_tokener_error_parse_unexpected;
+			goto out;
+		}
+		tok->st_pos++;
+		(void)ADVANCE_CHAR(str, tok);
+		if (!PEEK_CHAR(c, tok))
+		{
+			/* out of input chars, for now at least */
+			goto out;
+		}
+	}
+	/* We checked the full length of "Infinity", so create the object.
+	 * When handling -Infinity, the number parsing code will have dropped
+	 * the "-" into tok->pb for us, so check it now.
+	 */
+	if (printbuf_length(tok->pb) > 0 && *(tok->pb->buf) == '-')
+	{
+		is_negative = 1;
+	}
+	current = json_object_new_double(is_negative
+					 ? -INFINITY : INFINITY);
+	if (current == NULL)
+		goto out;
+	saved_state = json_tokener_state_finish;
+	state = json_tokener_state_eatws;
+	goto redo_char;
+	 
+      }
+      break;
+    case json_tokener_state_null: /* aka starts with 'n' */
+      {
+	int size;
+	int size_nan;
+	printbuf_memappend_fast(tok->pb, &c, 1);
+	size = json_min(tok->st_pos+1, json_null_str_len);
+	size_nan = json_min(tok->st_pos+1, json_nan_str_len);
+	if((!(tok->flags & JSON_TOKENER_STRICT) &&
+	  strncasecmp(json_null_str, tok->pb->buf, size) == 0)
+	  || (strncmp(json_null_str, tok->pb->buf, size) == 0)
+	  ) {
+	  if (tok->st_pos == json_null_str_len) {
+	    current = NULL;
+	    saved_state = json_tokener_state_finish;
+	    state = json_tokener_state_eatws;
+	    goto redo_char;
+	  }
+	}
+	else if ((!(tok->flags & JSON_TOKENER_STRICT) &&
+	          strncasecmp(json_nan_str, tok->pb->buf, size_nan) == 0) ||
+	         (strncmp(json_nan_str, tok->pb->buf, size_nan) == 0)
+	        )
+	{
+		if (tok->st_pos == json_nan_str_len)
+		{
+			current = json_object_new_double(NAN);
+			if (current == NULL)
+			    goto out;
+			saved_state = json_tokener_state_finish;
+			state = json_tokener_state_eatws;
+			goto redo_char;
+		}
+	} else {
+	  tok->err = json_tokener_error_parse_null;
+	  goto out;
+	}
+	tok->st_pos++;
+      }
+      break;
+
+    case json_tokener_state_comment_start:
+      if(c == '*') {
+	state = json_tokener_state_comment;
+      } else if(c == '/') {
+	state = json_tokener_state_comment_eol;
+      } else {
+	tok->err = json_tokener_error_parse_comment;
+	goto out;
+      }
+      printbuf_memappend_fast(tok->pb, &c, 1);
+      break;
+
+    case json_tokener_state_comment:
+              {
+          /* Advance until we change state */
+          const char *case_start = str;
+          while(c != '*') {
+            if (!ADVANCE_CHAR(str, tok) || !PEEK_CHAR(c, tok)) {
+              printbuf_memappend_fast(tok->pb, case_start, str-case_start);
+              goto out;
+            }
+          }
+          printbuf_memappend_fast(tok->pb, case_start, 1+str-case_start);
+          state = json_tokener_state_comment_end;
+        }
+            break;
+
+    case json_tokener_state_comment_eol:
+      {
+	/* Advance until we change state */
+	const char *case_start = str;
+	while(c != '\n') {
+	  if (!ADVANCE_CHAR(str, tok) || !PEEK_CHAR(c, tok)) {
+	    printbuf_memappend_fast(tok->pb, case_start, str-case_start);
+	    goto out;
+	  }
+	}
+	printbuf_memappend_fast(tok->pb, case_start, str-case_start);
+	MC_DEBUG("json_tokener_comment: %s\n", tok->pb->buf);
+	state = json_tokener_state_eatws;
+      }
+      break;
+
+    case json_tokener_state_comment_end:
+      printbuf_memappend_fast(tok->pb, &c, 1);
+      if(c == '/') {
+	MC_DEBUG("json_tokener_comment: %s\n", tok->pb->buf);
+	state = json_tokener_state_eatws;
+      } else {
+	state = json_tokener_state_comment;
+      }
+      break;
+
+    case json_tokener_state_string:
+      {
+	/* Advance until we change state */
+	const char *case_start = str;
+	while(1) {
+	  if(c == tok->quote_char) {
+	    printbuf_memappend_fast(tok->pb, case_start, str-case_start);
+	    current = json_object_new_string_len(tok->pb->buf, tok->pb->bpos);
+	    if(current == NULL)
+		goto out;
+	    saved_state = json_tokener_state_finish;
+	    state = json_tokener_state_eatws;
+	    break;
+	  } else if(c == '\\') {
+	    printbuf_memappend_fast(tok->pb, case_start, str-case_start);
+	    saved_state = json_tokener_state_string;
+	    state = json_tokener_state_string_escape;
+	    break;
+	  }
+	  if (!ADVANCE_CHAR(str, tok) || !PEEK_CHAR(c, tok)) {
+	    printbuf_memappend_fast(tok->pb, case_start, str-case_start);
+	    goto out;
+	  }
+	}
+      }
+      break;
+
+    case json_tokener_state_string_escape:
+      switch(c) {
+      case '"':
+      case '\\':
+      case '/':
+	printbuf_memappend_fast(tok->pb, &c, 1);
+	state = saved_state;
+	break;
+      case 'b':
+      case 'n':
+      case 'r':
+      case 't':
+      case 'f':
+	if(c == 'b') printbuf_memappend_fast(tok->pb, "\b", 1);
+	else if(c == 'n') printbuf_memappend_fast(tok->pb, "\n", 1);
+	else if(c == 'r') printbuf_memappend_fast(tok->pb, "\r", 1);
+	else if(c == 't') printbuf_memappend_fast(tok->pb, "\t", 1);
+	else if(c == 'f') printbuf_memappend_fast(tok->pb, "\f", 1);
+	state = saved_state;
+	break;
+      case 'u':
+	tok->ucs_char = 0;
+	tok->st_pos = 0;
+	state = json_tokener_state_escape_unicode;
+	break;
+      default:
+	tok->err = json_tokener_error_parse_string;
+	goto out;
+      }
+      break;
+
+    case json_tokener_state_escape_unicode:
+	{
+          unsigned int got_hi_surrogate = 0;
+
+	  /* Handle a 4-byte sequence, or two sequences if a surrogate pair */
+	  while(1) {
+	    if (c && strchr(json_hex_chars, c)) {
+	      tok->ucs_char += ((unsigned int)jt_hexdigit(c) << ((3-tok->st_pos++)*4));
+	      if(tok->st_pos == 4) {
+		unsigned char unescaped_utf[4];
+
+                if (got_hi_surrogate) {
+		  if (IS_LOW_SURROGATE(tok->ucs_char)) {
+                    /* Recalculate the ucs_char, then fall thru to process normally */
+                    tok->ucs_char = DECODE_SURROGATE_PAIR(got_hi_surrogate, tok->ucs_char);
+                  } else {
+                    /* Hi surrogate was not followed by a low surrogate */
+                    /* Replace the hi and process the rest normally */
+		    printbuf_memappend_fast(tok->pb, (char*)utf8_replacement_char, 3);
+                  }
+                  got_hi_surrogate = 0;
+                }
+
+		if (tok->ucs_char < 0x80) {
+		  unescaped_utf[0] = tok->ucs_char;
+		  printbuf_memappend_fast(tok->pb, (char*)unescaped_utf, 1);
+		} else if (tok->ucs_char < 0x800) {
+		  unescaped_utf[0] = 0xc0 | (tok->ucs_char >> 6);
+		  unescaped_utf[1] = 0x80 | (tok->ucs_char & 0x3f);
+		  printbuf_memappend_fast(tok->pb, (char*)unescaped_utf, 2);
+		} else if (IS_HIGH_SURROGATE(tok->ucs_char)) {
+                  /* Got a high surrogate.  Remember it and look for the
+                   * the beginning of another sequence, which should be the
+                   * low surrogate.
+                   */
+                  got_hi_surrogate = tok->ucs_char;
+                  /* Not at end, and the next two chars should be "\u" */
+                  if ((len == -1 || len > (tok->char_offset + 2)) &&
+                      // str[0] != '0' &&  // implied by json_hex_chars, above.
+                      (str[1] == '\\') &&
+                      (str[2] == 'u'))
+                  {
+                /* Advance through the 16 bit surrogate, and move on to the
+                 * next sequence. The next step is to process the following
+                 * characters.
+                 */
+	            if( !ADVANCE_CHAR(str, tok) || !ADVANCE_CHAR(str, tok) ) {
+                    printbuf_memappend_fast(tok->pb,
+					    (char*) utf8_replacement_char, 3);
+		    }
+                    /* Advance to the first char of the next sequence and
+                     * continue processing with the next sequence.
+                     */
+	            if (!ADVANCE_CHAR(str, tok) || !PEEK_CHAR(c, tok)) {
+	              printbuf_memappend_fast(tok->pb,
+					      (char*) utf8_replacement_char, 3);
+	              goto out;
+                    }
+	            tok->ucs_char = 0;
+                    tok->st_pos = 0;
+                    continue; /* other json_tokener_state_escape_unicode */
+                  } else {
+                    /* Got a high surrogate without another sequence following
+                     * it.  Put a replacement char in for the hi surrogate
+                     * and pretend we finished.
+                     */
+		    printbuf_memappend_fast(tok->pb,
+					    (char*) utf8_replacement_char, 3);
+                  }
+		} else if (IS_LOW_SURROGATE(tok->ucs_char)) {
+                  /* Got a low surrogate not preceded by a high */
+		  printbuf_memappend_fast(tok->pb, (char*)utf8_replacement_char, 3);
+                } else if (tok->ucs_char < 0x10000) {
+		  unescaped_utf[0] = 0xe0 | (tok->ucs_char >> 12);
+		  unescaped_utf[1] = 0x80 | ((tok->ucs_char >> 6) & 0x3f);
+		  unescaped_utf[2] = 0x80 | (tok->ucs_char & 0x3f);
+		  printbuf_memappend_fast(tok->pb, (char*)unescaped_utf, 3);
+		} else if (tok->ucs_char < 0x110000) {
+		  unescaped_utf[0] = 0xf0 | ((tok->ucs_char >> 18) & 0x07);
+		  unescaped_utf[1] = 0x80 | ((tok->ucs_char >> 12) & 0x3f);
+		  unescaped_utf[2] = 0x80 | ((tok->ucs_char >> 6) & 0x3f);
+		  unescaped_utf[3] = 0x80 | (tok->ucs_char & 0x3f);
+		  printbuf_memappend_fast(tok->pb, (char*)unescaped_utf, 4);
+		} else {
+                  /* Don't know what we got--insert the replacement char */
+		  printbuf_memappend_fast(tok->pb, (char*)utf8_replacement_char, 3);
+                }
+		state = saved_state;
+		break;
+	      }
+	    } else {
+	      tok->err = json_tokener_error_parse_string;
+	      goto out;
+	    }
+	  if (!ADVANCE_CHAR(str, tok) || !PEEK_CHAR(c, tok)) {
+            if (got_hi_surrogate) /* Clean up any pending chars */
+	      printbuf_memappend_fast(tok->pb, (char*)utf8_replacement_char, 3);
+	    goto out;
+	  }
+	}
+      }
+      break;
+
+    case json_tokener_state_boolean:
+      {
+	int size1, size2;
+	printbuf_memappend_fast(tok->pb, &c, 1);
+	size1 = json_min(tok->st_pos+1, json_true_str_len);
+	size2 = json_min(tok->st_pos+1, json_false_str_len);
+	if((!(tok->flags & JSON_TOKENER_STRICT) &&
+	  strncasecmp(json_true_str, tok->pb->buf, size1) == 0)
+	  || (strncmp(json_true_str, tok->pb->buf, size1) == 0)
+	  ) {
+	  if(tok->st_pos == json_true_str_len) {
+	    current = json_object_new_boolean(1);
+	    if(current == NULL)
+		goto out;
+	    saved_state = json_tokener_state_finish;
+	    state = json_tokener_state_eatws;
+	    goto redo_char;
+	  }
+	} else if((!(tok->flags & JSON_TOKENER_STRICT) &&
+	  strncasecmp(json_false_str, tok->pb->buf, size2) == 0)
+	  || (strncmp(json_false_str, tok->pb->buf, size2) == 0)) {
+	  if(tok->st_pos == json_false_str_len) {
+	    current = json_object_new_boolean(0);
+	    if(current == NULL)
+		goto out;
+	    saved_state = json_tokener_state_finish;
+	    state = json_tokener_state_eatws;
+	    goto redo_char;
+	  }
+	} else {
+	  tok->err = json_tokener_error_parse_boolean;
+	  goto out;
+	}
+	tok->st_pos++;
+      }
+      break;
+
+    case json_tokener_state_number:
+      {
+	/* Advance until we change state */
+	const char *case_start = str;
+	int case_len=0;
+	int is_exponent=0;
+	int negativesign_next_possible_location=1;
+	while(c && strchr(json_number_chars, c)) {
+	  ++case_len;
+
+	  /* non-digit characters checks */
+	  /* note: since the main loop condition to get here was
+	           an input starting with 0-9 or '-', we are
+	           protected from input starting with '.' or
+	           e/E. */
+	  if (c == '.') {
+	    if (tok->is_double != 0) {
+	      /* '.' can only be found once, and out of the exponent part.
+	         Thus, if the input is already flagged as double, it
+	         is invalid. */
+	      tok->err = json_tokener_error_parse_number;
+	      goto out;
+	    }
+	    tok->is_double = 1;
+	  }
+	  if (c == 'e' || c == 'E') {
+	    if (is_exponent != 0) {
+	      /* only one exponent possible */
+	      tok->err = json_tokener_error_parse_number;
+	      goto out;
+	    }
+	    is_exponent = 1;
+	    tok->is_double = 1;
+	    /* the exponent part can begin with a negative sign */
+	    negativesign_next_possible_location = case_len + 1;
+	  }
+	  if (c == '-' && case_len != negativesign_next_possible_location) {
+	    /* If the negative sign is not where expected (ie
+	       start of input or start of exponent part), the
+	       input is invalid. */
+	    tok->err = json_tokener_error_parse_number;
+	    goto out;
+	  }
+
+	  if (!ADVANCE_CHAR(str, tok) || !PEEK_CHAR(c, tok)) {
+	    printbuf_memappend_fast(tok->pb, case_start, case_len);
+	    goto out;
+	  }
+	}
+        if (case_len>0)
+          printbuf_memappend_fast(tok->pb, case_start, case_len);
+
+	// Check for -Infinity
+	if (tok->pb->buf[0] == '-' && case_len <= 1 &&
+	    (c == 'i' || c == 'I'))
+	{
+		state = json_tokener_state_inf;
+		tok->st_pos = 0;
+		goto redo_char;
+	}
+      }
+      {
+	int64_t num64;
+	double  numd;
+	if (!tok->is_double && json_parse_int64(tok->pb->buf, &num64) == 0) {
+		if (num64 && tok->pb->buf[0]=='0' &&
+		    (tok->flags & JSON_TOKENER_STRICT)) {
+			/* in strict mode, number must not start with 0 */
+			tok->err = json_tokener_error_parse_number;
+			goto out;
+		}
+		current = json_object_new_int64(num64);
+		if(current == NULL)
+		    goto out;
+	}
+	else if(tok->is_double && json_parse_double(tok->pb->buf, &numd) == 0)
+	{
+          current = json_object_new_double_s(numd, tok->pb->buf);
+	  if(current == NULL)
+		goto out;
+        } else {
+          tok->err = json_tokener_error_parse_number;
+          goto out;
+        }
+        saved_state = json_tokener_state_finish;
+        state = json_tokener_state_eatws;
+        goto redo_char;
+      }
+      break;
+
+    case json_tokener_state_array_after_sep:
+    case json_tokener_state_array:
+      if(c == ']') {
+	if (state == json_tokener_state_array_after_sep &&
+	    (tok->flags & JSON_TOKENER_STRICT))
+	  {
+	    tok->err = json_tokener_error_parse_unexpected;
+	    goto out;
+	  }
+	saved_state = json_tokener_state_finish;
+	state = json_tokener_state_eatws;
+      } else {
+	if(tok->depth >= tok->max_depth-1) {
+	  tok->err = json_tokener_error_depth;
+	  goto out;
+	}
+	state = json_tokener_state_array_add;
+	tok->depth++;
+	json_tokener_reset_level(tok, tok->depth);
+	goto redo_char;
+      }
+      break;
+
+    case json_tokener_state_array_add:
+      if( json_object_array_add(current, obj) != 0 )
+        goto out;
+      saved_state = json_tokener_state_array_sep;
+      state = json_tokener_state_eatws;
+      goto redo_char;
+
+    case json_tokener_state_array_sep:
+      if(c == ']') {
+	saved_state = json_tokener_state_finish;
+	state = json_tokener_state_eatws;
+      } else if(c == ',') {
+	saved_state = json_tokener_state_array_after_sep;
+	state = json_tokener_state_eatws;
+      } else {
+	tok->err = json_tokener_error_parse_array;
+	goto out;
+      }
+      break;
+
+    case json_tokener_state_object_field_start:
+    case json_tokener_state_object_field_start_after_sep:
+      if(c == '}') {
+		if (state == json_tokener_state_object_field_start_after_sep &&
+		    (tok->flags & JSON_TOKENER_STRICT))
+		{
+			tok->err = json_tokener_error_parse_unexpected;
+			goto out;
+		}
+	saved_state = json_tokener_state_finish;
+	state = json_tokener_state_eatws;
+      } else if (c == '"' || c == '\'') {
+	tok->quote_char = c;
+	printbuf_reset(tok->pb);
+	state = json_tokener_state_object_field;
+      } else {
+	tok->err = json_tokener_error_parse_object_key_name;
+	goto out;
+      }
+      break;
+
+    case json_tokener_state_object_field:
+      {
+	/* Advance until we change state */
+	const char *case_start = str;
+	while(1) {
+	  if(c == tok->quote_char) {
+	    printbuf_memappend_fast(tok->pb, case_start, str-case_start);
+	    obj_field_name = strdup(tok->pb->buf);
+	    saved_state = json_tokener_state_object_field_end;
+	    state = json_tokener_state_eatws;
+	    break;
+	  } else if(c == '\\') {
+	    printbuf_memappend_fast(tok->pb, case_start, str-case_start);
+	    saved_state = json_tokener_state_object_field;
+	    state = json_tokener_state_string_escape;
+	    break;
+	  }
+	  if (!ADVANCE_CHAR(str, tok) || !PEEK_CHAR(c, tok)) {
+	    printbuf_memappend_fast(tok->pb, case_start, str-case_start);
+	    goto out;
+	  }
+	}
+      }
+      break;
+
+    case json_tokener_state_object_field_end:
+      if(c == ':') {
+	saved_state = json_tokener_state_object_value;
+	state = json_tokener_state_eatws;
+      } else {
+	tok->err = json_tokener_error_parse_object_key_sep;
+	goto out;
+      }
+      break;
+
+    case json_tokener_state_object_value:
+      if(tok->depth >= tok->max_depth-1) {
+	tok->err = json_tokener_error_depth;
+	goto out;
+      }
+      state = json_tokener_state_object_value_add;
+      tok->depth++;
+      json_tokener_reset_level(tok, tok->depth);
+      goto redo_char;
+
+    case json_tokener_state_object_value_add:
+      json_object_object_add(current, obj_field_name, obj);
+      free(obj_field_name);
+      obj_field_name = NULL;
+      saved_state = json_tokener_state_object_sep;
+      state = json_tokener_state_eatws;
+      goto redo_char;
+
+    case json_tokener_state_object_sep:
+      /* { */
+      if(c == '}') {
+	saved_state = json_tokener_state_finish;
+	state = json_tokener_state_eatws;
+      } else if(c == ',') {
+	saved_state = json_tokener_state_object_field_start_after_sep;
+	state = json_tokener_state_eatws;
+      } else {
+	tok->err = json_tokener_error_parse_object_value_sep;
+	goto out;
+      }
+      break;
+
+    }
+    if (!ADVANCE_CHAR(str, tok))
+      goto out;
+  } /* while(PEEK_CHAR) */
+
+ out:
+  if (c &&
+     (state == json_tokener_state_finish) &&
+     (tok->depth == 0) &&
+     (tok->flags & JSON_TOKENER_STRICT)) {
+      /* unexpected char after JSON data */
+      tok->err = json_tokener_error_parse_unexpected;
+  }
+  if (!c) { /* We hit an eof char (0) */
+    if(state != json_tokener_state_finish &&
+       saved_state != json_tokener_state_finish)
+      tok->err = json_tokener_error_parse_eof;
+  }
+
+#ifdef HAVE_USELOCALE
+  uselocale(oldlocale);
+  freelocale(newloc); 
+#elif defined(HAVE_SETLOCALE)
+  setlocale(LC_NUMERIC, oldlocale);
+  free(oldlocale);
+#endif
+
+  if (tok->err == json_tokener_success)
+  {
+    json_object *ret = json_object_get(current);
+	int ii;
+
+	/* Partially reset, so we parse additional objects on subsequent calls. */
+    for(ii = tok->depth; ii >= 0; ii--)
+      json_tokener_reset_level(tok, ii);
+    return ret;
+  }
+
+  MC_DEBUG("json_tokener_parse_ex: error %s at offset %d\n",
+	   json_tokener_errors[tok->err], tok->char_offset);
+  return NULL;
+}
+
+void json_tokener_set_flags(struct json_tokener *tok, int flags)
+{
+	tok->flags = flags;
+}
diff --git a/third_party/json-c/json_tokener.h b/third_party/json-c/json_tokener.h
new file mode 100644
index 0000000000..ed272b673d
--- /dev/null
+++ b/third_party/json-c/json_tokener.h
@@ -0,0 +1,216 @@
+/*
+ * $Id: json_tokener.h,v 1.10 2006/07/25 03:24:50 mclark Exp $
+ *
+ * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+/**
+ * @file
+ * @brief Methods to parse an input string into a tree of json_object objects.
+ */
+#ifndef _json_tokener_h_
+#define _json_tokener_h_
+
+#include <stddef.h>
+#include "json_object.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum json_tokener_error {
+  json_tokener_success,
+  json_tokener_continue,
+  json_tokener_error_depth,
+  json_tokener_error_parse_eof,
+  json_tokener_error_parse_unexpected,
+  json_tokener_error_parse_null,
+  json_tokener_error_parse_boolean,
+  json_tokener_error_parse_number,
+  json_tokener_error_parse_array,
+  json_tokener_error_parse_object_key_name,
+  json_tokener_error_parse_object_key_sep,
+  json_tokener_error_parse_object_value_sep,
+  json_tokener_error_parse_string,
+  json_tokener_error_parse_comment,
+  json_tokener_error_size
+};
+
+enum json_tokener_state {
+  json_tokener_state_eatws,
+  json_tokener_state_start,
+  json_tokener_state_finish,
+  json_tokener_state_null,
+  json_tokener_state_comment_start,
+  json_tokener_state_comment,
+  json_tokener_state_comment_eol,
+  json_tokener_state_comment_end,
+  json_tokener_state_string,
+  json_tokener_state_string_escape,
+  json_tokener_state_escape_unicode,
+  json_tokener_state_boolean,
+  json_tokener_state_number,
+  json_tokener_state_array,
+  json_tokener_state_array_add,
+  json_tokener_state_array_sep,
+  json_tokener_state_object_field_start,
+  json_tokener_state_object_field,
+  json_tokener_state_object_field_end,
+  json_tokener_state_object_value,
+  json_tokener_state_object_value_add,
+  json_tokener_state_object_sep,
+  json_tokener_state_array_after_sep,
+  json_tokener_state_object_field_start_after_sep,
+  json_tokener_state_inf
+};
+
+struct json_tokener_srec
+{
+  enum json_tokener_state state, saved_state;
+  struct json_object *obj;
+  struct json_object *current;
+  char *obj_field_name;
+};
+
+#define JSON_TOKENER_DEFAULT_DEPTH 32
+
+struct json_tokener
+{
+  char *str;
+  struct printbuf *pb;
+  int max_depth, depth, is_double, st_pos, char_offset;
+  enum json_tokener_error err;
+  unsigned int ucs_char;
+  char quote_char;
+  struct json_tokener_srec *stack;
+  int flags;
+};
+/**
+ * @deprecated Unused in json-c code
+ */
+typedef struct json_tokener json_tokener;
+
+/**
+ * Be strict when parsing JSON input.  Use caution with
+ * this flag as what is considered valid may become more
+ * restrictive from one release to the next, causing your
+ * code to fail on previously working input.
+ *
+ * This flag is not set by default.
+ *
+ * @see json_tokener_set_flags()
+ */
+#define JSON_TOKENER_STRICT  0x01
+
+/**
+ * Given an error previously returned by json_tokener_get_error(),
+ * return a human readable description of the error.
+ *
+ * @return a generic error message is returned if an invalid error value is provided.
+ */
+const char *json_tokener_error_desc(enum json_tokener_error jerr);
+
+/**
+ * Retrieve the error caused by the last call to json_tokener_parse_ex(),
+ * or json_tokener_success if there is no error.
+ *
+ * When parsing a JSON string in pieces, if the tokener is in the middle
+ * of parsing this will return json_tokener_continue.
+ *
+ * See also json_tokener_error_desc().
+ */
+JSON_EXPORT enum json_tokener_error json_tokener_get_error(struct json_tokener *tok);
+
+JSON_EXPORT struct json_tokener* json_tokener_new(void);
+JSON_EXPORT struct json_tokener* json_tokener_new_ex(int depth);
+JSON_EXPORT void json_tokener_free(struct json_tokener *tok);
+JSON_EXPORT void json_tokener_reset(struct json_tokener *tok);
+JSON_EXPORT struct json_object* json_tokener_parse(const char *str);
+JSON_EXPORT struct json_object* json_tokener_parse_verbose(const char *str, enum json_tokener_error *error);
+
+/**
+ * Set flags that control how parsing will be done.
+ */
+JSON_EXPORT void json_tokener_set_flags(struct json_tokener *tok, int flags);
+
+/**
+ * Parse a string and return a non-NULL json_object if a valid JSON value
+ * is found.  The string does not need to be a JSON object or array;
+ * it can also be a string, number or boolean value.
+ *
+ * A partial JSON string can be parsed.  If the parsing is incomplete,
+ * NULL will be returned and json_tokener_get_error() will return
+ * json_tokener_continue.
+ * json_tokener_parse_ex() can then be called with additional bytes in str
+ * to continue the parsing.
+ *
+ * If json_tokener_parse_ex() returns NULL and the error is anything other than
+ * json_tokener_continue, a fatal error has occurred and parsing must be
+ * halted.  Then, the tok object must not be reused until json_tokener_reset() is
+ * called.
+ *
+ * When a valid JSON value is parsed, a non-NULL json_object will be
+ * returned.  Also, json_tokener_get_error() will return json_tokener_success.
+ * Be sure to check the type with json_object_is_type() or
+ * json_object_get_type() before using the object.
+ *
+ * @b XXX this shouldn't use internal fields:
+ * Trailing characters after the parsed value do not automatically cause an
+ * error.  It is up to the caller to decide whether to treat this as an
+ * error or to handle the additional characters, perhaps by parsing another
+ * json value starting from that point.
+ *
+ * Extra characters can be detected by comparing the tok->char_offset against
+ * the length of the last len parameter passed in.
+ *
+ * The tokener does \b not maintain an internal buffer so the caller is
+ * responsible for calling json_tokener_parse_ex with an appropriate str
+ * parameter starting with the extra characters.
+ *
+ * This interface is presently not 64-bit clean due to the int len argument
+ * so the function limits the maximum string size to INT32_MAX (2GB).
+ * If the function is called with len == -1 then strlen is called to check
+ * the string length is less than INT32_MAX (2GB)
+ *
+ * Example:
+ * @code
+json_object *jobj = NULL;
+const char *mystring = NULL;
+int stringlen = 0;
+enum json_tokener_error jerr;
+do {
+	mystring = ...  // get JSON string, e.g. read from file, etc...
+	stringlen = strlen(mystring);
+	jobj = json_tokener_parse_ex(tok, mystring, stringlen);
+} while ((jerr = json_tokener_get_error(tok)) == json_tokener_continue);
+if (jerr != json_tokener_success)
+{
+	fprintf(stderr, "Error: %s\n", json_tokener_error_desc(jerr));
+	// Handle errors, as appropriate for your application.
+}
+if (tok->char_offset < stringlen) // XXX shouldn't access internal fields
+{
+	// Handle extra characters after parsed object as desired.
+	// e.g. issue an error, parse another object from that point, etc...
+}
+// Success, use jobj here.
+
+@endcode
+ *
+ * @param tok a json_tokener previously allocated with json_tokener_new()
+ * @param str an string with any valid JSON expression, or portion of.  This does not need to be null terminated.
+ * @param len the length of str
+ */
+JSON_EXPORT struct json_object* json_tokener_parse_ex(struct json_tokener *tok,
+						 const char *str, int len);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/third_party/json-c/json_util.c b/third_party/json-c/json_util.c
new file mode 100644
index 0000000000..ad7704a945
--- /dev/null
+++ b/third_party/json-c/json_util.c
@@ -0,0 +1,243 @@
+/*
+ * $Id: json_util.c,v 1.4 2006/01/30 23:07:57 mclark Exp $
+ *
+ * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+#include "config.h"
+#undef realloc
+
+#include "strerror_override.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <limits.h>
+#include <string.h>
+#include <ctype.h>
+
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif /* HAVE_SYS_TYPES_H */
+
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif /* HAVE_SYS_STAT_H */
+
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif /* HAVE_FCNTL_H */
+
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+
+#ifdef WIN32
+# if MSC_VER < 1800
+/* strtoll is available only since Visual Studio 2013 */
+#  define strtoll _strtoi64
+# endif
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+# include <io.h>
+#endif /* defined(WIN32) */
+
+#if !defined(HAVE_OPEN) && defined(WIN32)
+# define open _open
+#endif
+
+#include "snprintf_compat.h"
+
+#include "debug.h"
+#include "printbuf.h"
+#include "json_inttypes.h"
+#include "json_object.h"
+#include "json_tokener.h"
+#include "json_util.h"
+
+static int _json_object_to_fd(int fd, struct json_object *obj, int flags, const char *filename);
+
+static char _last_err[256] = "";
+
+const char *json_util_get_last_err()
+{
+	if (_last_err[0] == '\0')
+		return NULL;
+	return _last_err;
+}
+
+void _json_c_set_last_err(const char *err_fmt, ...)
+{
+	va_list ap;
+	va_start(ap, err_fmt);
+	// Ignore (attempted) overruns from snprintf
+	(void)vsnprintf(_last_err, sizeof(_last_err), err_fmt, ap);
+	va_end(ap);
+}
+
+struct json_object* json_object_from_fd(int fd)
+{
+  struct printbuf *pb;
+  struct json_object *obj;
+  char buf[JSON_FILE_BUF_SIZE];
+  int ret;
+
+  if(!(pb = printbuf_new())) {
+    _json_c_set_last_err("json_object_from_file: printbuf_new failed\n");
+    return NULL;
+  }
+  while((ret = read(fd, buf, JSON_FILE_BUF_SIZE)) > 0) {
+    printbuf_memappend(pb, buf, ret);
+  }
+  if(ret < 0) {
+    _json_c_set_last_err("json_object_from_fd: error reading fd %d: %s\n", fd, strerror(errno));
+    printbuf_free(pb);
+    return NULL;
+  }
+  obj = json_tokener_parse(pb->buf);
+  printbuf_free(pb);
+  return obj;
+}
+
+struct json_object* json_object_from_file(const char *filename)
+{
+  struct json_object *obj;
+  int fd;
+
+  if((fd = open(filename, O_RDONLY)) < 0) {
+    _json_c_set_last_err("json_object_from_file: error opening file %s: %s\n",
+	     filename, strerror(errno));
+    return NULL;
+  }
+  obj = json_object_from_fd(fd);
+  close(fd);
+  return obj;
+}
+
+/* extended "format and write to file" function */
+
+int json_object_to_file_ext(const char *filename, struct json_object *obj, int flags)
+{
+	int fd, ret;
+	int saved_errno;
+
+	if (!obj) {
+		_json_c_set_last_err("json_object_to_file: object is null\n");
+		return -1;
+	}
+
+	if ((fd = open(filename, O_WRONLY | O_TRUNC | O_CREAT, 0644)) < 0) {
+		_json_c_set_last_err("json_object_to_file: error opening file %s: %s\n",
+		              filename, strerror(errno));
+		return -1;
+	}
+	ret = _json_object_to_fd(fd, obj, flags, filename);
+	saved_errno = errno;
+	close(fd);
+	errno = saved_errno;
+	return ret;
+}
+
+int json_object_to_fd(int fd, struct json_object *obj, int flags)
+{
+	if (!obj) {
+		_json_c_set_last_err("json_object_to_fd: object is null\n");
+		return -1;
+	}
+
+	return _json_object_to_fd(fd, obj, flags, NULL);
+}
+static int _json_object_to_fd(int fd, struct json_object *obj, int flags, const char *filename)
+{
+	int ret;
+	const char *json_str;
+	unsigned int wpos, wsize;
+
+	filename = filename ? filename : "(fd)";
+
+	if (!(json_str = json_object_to_json_string_ext(obj,flags))) {
+		return -1;
+	}
+
+	wsize = (unsigned int)(strlen(json_str) & UINT_MAX); /* CAW: probably unnecessary, but the most 64bit safe */
+	wpos = 0;
+	while(wpos < wsize) {
+		if((ret = write(fd, json_str + wpos, wsize-wpos)) < 0) {
+		  _json_c_set_last_err("json_object_to_file: error writing file %s: %s\n",
+			 filename, strerror(errno));
+		  return -1;
+		}
+
+		/* because of the above check for ret < 0, we can safely cast and add */
+		wpos += (unsigned int)ret;
+	}
+
+	return 0;
+}
+
+// backwards compatible "format and write to file" function
+
+int json_object_to_file(const char *filename, struct json_object *obj)
+{
+  return json_object_to_file_ext(filename, obj, JSON_C_TO_STRING_PLAIN);
+}
+
+int json_parse_double(const char *buf, double *retval)
+{
+  char *end;
+  *retval = strtod(buf, &end);
+  return end == buf ? 1 : 0;
+}
+
+int json_parse_int64(const char *buf, int64_t *retval)
+{
+	char *end = NULL;
+	int64_t val;
+
+	errno = 0;
+	val = strtoll(buf, &end, 10);
+	if (end != buf)
+		*retval = val;
+	return ((val == 0 && errno != 0) || (end == buf)) ? 1 : 0;
+}
+
+#ifndef HAVE_REALLOC
+void* rpl_realloc(void* p, size_t n)
+{
+	if (n == 0)
+		n = 1;
+	if (p == 0)
+		return malloc(n);
+	return realloc(p, n);
+}
+#endif
+
+#define NELEM(a)        (sizeof(a) / sizeof(a[0]))
+static const char* json_type_name[] = {
+  /* If you change this, be sure to update the enum json_type definition too */
+  "null",
+  "boolean",
+  "double",
+  "int",
+  "object",
+  "array",
+  "string",
+};
+
+const char *json_type_to_name(enum json_type o_type)
+{
+	int o_type_int = (int)o_type;
+	if (o_type_int < 0 || o_type_int >= (int)NELEM(json_type_name))
+	{
+		_json_c_set_last_err("json_type_to_name: type %d is out of range [0,%d]\n", o_type, NELEM(json_type_name));
+		return NULL;
+	}
+	return json_type_name[o_type];
+}
+
diff --git a/third_party/json-c/json_util.h b/third_party/json-c/json_util.h
new file mode 100644
index 0000000000..e065f60c66
--- /dev/null
+++ b/third_party/json-c/json_util.h
@@ -0,0 +1,106 @@
+/*
+ * $Id: json_util.h,v 1.4 2006/01/30 23:07:57 mclark Exp $
+ *
+ * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+/**
+ * @file
+ * @brief Miscllaneous utility functions and macros.
+ */ 
+#ifndef _json_util_h_
+#define _json_util_h_
+
+#include "json_object.h"
+
+#ifndef json_min
+#define json_min(a,b) ((a) < (b) ? (a) : (b))
+#endif
+
+#ifndef json_max
+#define json_max(a,b) ((a) > (b) ? (a) : (b))
+#endif
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define JSON_FILE_BUF_SIZE 4096
+
+/* utility functions */
+/**
+ * Read the full contents of the given file, then convert it to a
+ * json_object using json_tokener_parse().
+ *
+ * Returns -1 if something fails.  See json_util_get_last_err() for details.
+ */
+extern struct json_object* json_object_from_file(const char *filename);
+
+/**
+ * Create a JSON object from already opened file descriptor.
+ *
+ * This function can be helpful, when you opened the file already,
+ * e.g. when you have a temp file.
+ * Note, that the fd must be readable at the actual position, i.e.
+ * use lseek(fd, 0, SEEK_SET) before.
+ *
+ * Returns -1 if something fails.  See json_util_get_last_err() for details.
+ */
+extern struct json_object* json_object_from_fd(int fd);
+
+/**
+ * Equivalent to:
+ *   json_object_to_file_ext(filename, obj, JSON_C_TO_STRING_PLAIN);
+ *
+ * Returns -1 if something fails.  See json_util_get_last_err() for details.
+ */
+extern int json_object_to_file(const char *filename, struct json_object *obj);
+
+/**
+ * Open and truncate the given file, creating it if necessary, then
+ * convert the json_object to a string and write it to the file.
+ *
+ * Returns -1 if something fails.  See json_util_get_last_err() for details.
+ */
+extern int json_object_to_file_ext(const char *filename, struct json_object *obj, int flags);
+
+/**
+ * Convert the json_object to a string and write it to the file descriptor.
+ * Handles partial writes and will keep writing until done, or an error
+ * occurs.
+ *
+ * @param fd an open, writable file descriptor to write to
+ * @param obj the object to serializer and write
+ * @param flags flags to pass to json_object_to_json_string_ext()
+ * @return -1 if something fails.  See json_util_get_last_err() for details.
+ */
+extern int json_object_to_fd(int fd, struct json_object *obj, int flags);
+
+/**
+ * Return the last error from various json-c functions, including:
+ * json_object_to_file{,_ext}, json_object_to_fd() or
+ * json_object_from_{file,fd}, or NULL if there is none.
+ */
+const char *json_util_get_last_err(void);
+
+
+extern int json_parse_int64(const char *buf, int64_t *retval);
+extern int json_parse_double(const char *buf, double *retval);
+
+/**
+ * Return a string describing the type of the object.
+ * e.g. "int", or "object", etc...
+ */
+extern const char *json_type_to_name(enum json_type o_type);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/third_party/json-c/json_visit.c b/third_party/json-c/json_visit.c
new file mode 100644
index 0000000000..1126ff8d7b
--- /dev/null
+++ b/third_party/json-c/json_visit.c
@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) 2016 Eric Haszlakiewicz
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ */
+
+#include <stdio.h>
+
+#include "config.h"
+#include "json_inttypes.h"
+#include "json_object.h"
+#include "json_visit.h"
+#include "linkhash.h"
+
+static int _json_c_visit(json_object *jso, json_object *parent_jso,
+                         const char *jso_key, size_t *jso_index,
+                         json_c_visit_userfunc *userfunc, void *userarg);
+
+int json_c_visit(json_object *jso, int future_flags,
+                 json_c_visit_userfunc *userfunc, void *userarg)
+{
+	int ret = _json_c_visit(jso, NULL, NULL, NULL, userfunc, userarg);
+	switch(ret)
+	{
+	case JSON_C_VISIT_RETURN_CONTINUE:
+	case JSON_C_VISIT_RETURN_SKIP:
+	case JSON_C_VISIT_RETURN_POP:
+	case JSON_C_VISIT_RETURN_STOP:
+		return 0;
+	default:
+		return JSON_C_VISIT_RETURN_ERROR;
+	}
+}
+static int _json_c_visit(json_object *jso, json_object *parent_jso,
+                         const char *jso_key, size_t *jso_index,
+                         json_c_visit_userfunc *userfunc, void *userarg)
+{
+	int userret = userfunc(jso, 0, parent_jso, jso_key, jso_index, userarg);
+	switch(userret)
+	{
+	case JSON_C_VISIT_RETURN_CONTINUE:
+		break;
+	case JSON_C_VISIT_RETURN_SKIP:
+	case JSON_C_VISIT_RETURN_POP:
+	case JSON_C_VISIT_RETURN_STOP:
+	case JSON_C_VISIT_RETURN_ERROR:
+		return userret;
+	default:
+		fprintf(stderr, "ERROR: invalid return value from json_c_visit userfunc: %d\n", userret);
+		return JSON_C_VISIT_RETURN_ERROR;
+	}
+
+	switch(json_object_get_type(jso))
+	{
+	case json_type_null:
+	case json_type_boolean:
+	case json_type_double:
+	case json_type_int:
+	case json_type_string:
+		// we already called userfunc above, move on to the next object
+		return JSON_C_VISIT_RETURN_CONTINUE;
+
+	case json_type_object:
+	{
+		json_object_object_foreach(jso, key, child)
+		{
+			userret = _json_c_visit(child, jso, key, NULL, userfunc, userarg);
+			if (userret == JSON_C_VISIT_RETURN_POP)
+				break;
+			if (userret == JSON_C_VISIT_RETURN_STOP ||
+				userret == JSON_C_VISIT_RETURN_ERROR)
+				return userret;
+			if (userret != JSON_C_VISIT_RETURN_CONTINUE &&
+				userret != JSON_C_VISIT_RETURN_SKIP)
+			{
+				fprintf(stderr, "INTERNAL ERROR: _json_c_visit returned %d\n", userret);
+				return JSON_C_VISIT_RETURN_ERROR;
+			}
+		}
+		break;
+	}
+	case json_type_array:
+	{
+		size_t array_len = json_object_array_length(jso);
+		size_t ii;
+		for (ii = 0; ii < array_len; ii++)
+		{
+			json_object *child = json_object_array_get_idx(jso, ii);
+			userret = _json_c_visit(child, jso, NULL, &ii, userfunc, userarg);
+			if (userret == JSON_C_VISIT_RETURN_POP)
+				break;
+			if (userret == JSON_C_VISIT_RETURN_STOP ||
+				userret == JSON_C_VISIT_RETURN_ERROR)
+				return userret;
+			if (userret != JSON_C_VISIT_RETURN_CONTINUE &&
+				userret != JSON_C_VISIT_RETURN_SKIP)
+			{
+				fprintf(stderr, "INTERNAL ERROR: _json_c_visit returned %d\n", userret);
+				return JSON_C_VISIT_RETURN_ERROR;
+			}
+		}
+		break;
+	}
+	default:
+		fprintf(stderr, "INTERNAL ERROR: _json_c_visit found object of unknown type: %d\n", json_object_get_type(jso));
+		return JSON_C_VISIT_RETURN_ERROR;
+	}
+
+	// Call userfunc for the second type on container types, after all
+	//  members of the container have been visited.
+	// Non-container types will have already returned before this point.
+
+	userret = userfunc(jso, JSON_C_VISIT_SECOND, parent_jso, jso_key, jso_index, userarg);
+	switch(userret)
+	{
+	case JSON_C_VISIT_RETURN_SKIP:
+	case JSON_C_VISIT_RETURN_POP:
+		// These are not really sensible during JSON_C_VISIT_SECOND, 
+		// but map them to JSON_C_VISIT_CONTINUE anyway.
+		// FALLTHROUGH
+	case JSON_C_VISIT_RETURN_CONTINUE:
+		return JSON_C_VISIT_RETURN_CONTINUE;
+	case JSON_C_VISIT_RETURN_STOP:
+	case JSON_C_VISIT_RETURN_ERROR:
+		return userret;
+	default:
+		fprintf(stderr, "ERROR: invalid return value from json_c_visit userfunc: %d\n", userret);
+		return JSON_C_VISIT_RETURN_ERROR;
+	}
+	// NOTREACHED
+}
+
diff --git a/third_party/json-c/json_visit.h b/third_party/json-c/json_visit.h
new file mode 100644
index 0000000000..b147d99ebc
--- /dev/null
+++ b/third_party/json-c/json_visit.h
@@ -0,0 +1,95 @@
+
+#ifndef _json_c_json_visit_h_
+#define _json_c_json_visit_h_
+
+/**
+ * @file
+ * @brief Methods for walking a tree of objects.
+ */
+#include "json_object.h"
+
+typedef int (json_c_visit_userfunc)(json_object *jso, int flags,
+                                     json_object *parent_jso,                                                        const char *jso_key,
+                                     size_t *jso_index, void *userarg);
+
+/**
+ * Visit each object in the JSON hierarchy starting at jso.
+ * For each object, userfunc is called, passing the object and userarg.
+ * If the object has a parent (i.e. anything other than jso itself)
+ * its parent will be passed as parent_jso, and either jso_key or jso_index
+ * will be set, depending on whether the parent is an object or an array.
+ *
+ * Nodes will be visited depth first, but containers (arrays and objects)
+ * will be visited twice, the second time with JSON_C_VISIT_SECOND set in
+ * flags.
+ *
+ * userfunc must return one of the defined return values, to indicate
+ * whether and how to continue visiting nodes, or one of various ways to stop.
+ *
+ * Returns 0 if nodes were visited successfully, even if some were 
+ *  intentionally skipped due to what userfunc returned.
+ * Returns <0 if an error occurred during iteration, including if
+ *  userfunc returned JSON_C_VISIT_RETURN_ERROR.
+ */
+int json_c_visit(json_object *jso, int future_flags,
+                 json_c_visit_userfunc *userfunc, void *userarg);
+
+/**
+ * Passed to json_c_visit_userfunc as one of the flags values to indicate
+ * that this is the second time a container (array or object) is being
+ * called, after all of it's members have been iterated over.
+ */
+#define JSON_C_VISIT_SECOND  0x02
+
+/**
+ * This json_c_visit_userfunc return value indicates that iteration
+ * should proceed normally.
+ */
+#define JSON_C_VISIT_RETURN_CONTINUE 0
+
+
+/**
+ * This json_c_visit_userfunc return value indicates that iteration
+ * over the members of the current object should be skipped.
+ * If the current object isn't a container (array or object), this
+ * is no different than JSON_C_VISIT_RETURN_CONTINUE.
+ */
+#define JSON_C_VISIT_RETURN_SKIP 7547
+
+/**
+ * This json_c_visit_userfunc return value indicates that iteration
+ * of the fields/elements of the <b>containing</b> object should stop
+ * and continue "popped up" a level of the object hierarchy.
+ * For example, returning this when handling arg will result in 
+ * arg3 and any other fields being skipped.   The next call to userfunc
+ * will be the JSON_C_VISIT_SECOND call on "foo", followed by a userfunc
+ * call on "bar".
+ * <pre>
+ * {
+ *   "foo": {
+ *     "arg1": 1,
+ *     "arg2": 2,
+ *     "arg3": 3,
+ *     ...
+ *   },
+ *   "bar": {
+ *     ...
+ *   }
+ * }
+ * </pre>
+ */
+#define JSON_C_VISIT_RETURN_POP 767
+
+/**
+ * This json_c_visit_userfunc return value indicates that iteration
+ * should stop immediately, and cause json_c_visit to return success.
+ */
+#define JSON_C_VISIT_RETURN_STOP 7867
+
+/**
+ * This json_c_visit_userfunc return value indicates that iteration
+ * should stop immediately, and cause json_c_visit to return an error.
+ */
+#define JSON_C_VISIT_RETURN_ERROR -1
+
+#endif /* _json_c_json_visit_h_ */
diff --git a/third_party/json-c/libjson.c b/third_party/json-c/libjson.c
new file mode 100644
index 0000000000..b19df42f72
--- /dev/null
+++ b/third_party/json-c/libjson.c
@@ -0,0 +1,26 @@
+
+/* dummy source file for compatibility purposes */
+
+#if defined(HAVE_CDEFS_H)
+#include <sys/cdefs.h>
+#endif
+
+#ifndef __warn_references
+
+#if defined(__GNUC__)  && defined (HAS_GNU_WARNING_LONG)
+
+#define __warn_references(sym,msg)                  \
+  __asm__(".section .gnu" #sym ",\n\t.ascii \"" msg "\"\n\t.text");
+
+#else
+#define __warn_references(sym,msg)    /* nothing */
+#endif
+
+#endif
+
+#include "json_object.h"
+
+__warn_references(json_object_get, "Warning: please link against libjson-c instead of libjson");
+
+/*        __asm__(".section .gnu.warning." __STRING(sym)  \
+            " ; .ascii \"" msg "\" ; .text") */
diff --git a/third_party/json-c/linkhash.c b/third_party/json-c/linkhash.c
new file mode 100644
index 0000000000..5497061a8a
--- /dev/null
+++ b/third_party/json-c/linkhash.c
@@ -0,0 +1,690 @@
+/*
+ * $Id: linkhash.c,v 1.4 2006/01/26 02:16:28 mclark Exp $
+ *
+ * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ * Copyright (c) 2009 Hewlett-Packard Development Company, L.P.
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <limits.h>
+
+#ifdef HAVE_ENDIAN_H
+# include <endian.h>    /* attempt to define endianness */
+#endif
+
+#if defined(_MSC_VER) || defined(__MINGW32__)
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>   /* Get InterlockedCompareExchange */
+#endif
+
+#include "random_seed.h"
+#include "linkhash.h"
+
+/* hash functions */
+static unsigned long lh_char_hash(const void *k);
+static unsigned long lh_perllike_str_hash(const void *k);
+static lh_hash_fn *char_hash_fn = lh_char_hash;
+
+int
+json_global_set_string_hash(const int h)
+{
+	switch(h) {
+	case JSON_C_STR_HASH_DFLT:
+		char_hash_fn = lh_char_hash;
+		break;
+	case JSON_C_STR_HASH_PERLLIKE:
+		char_hash_fn = lh_perllike_str_hash;
+		break;
+	default:
+		return -1;
+	}
+	return 0;
+}
+
+void lh_abort(const char *msg, ...)
+{
+	va_list ap;
+	va_start(ap, msg);
+	vprintf(msg, ap);
+	va_end(ap);
+	exit(1);
+}
+
+static unsigned long lh_ptr_hash(const void *k)
+{
+	/* CAW: refactored to be 64bit nice */
+	return (unsigned long)((((ptrdiff_t)k * LH_PRIME) >> 4) & ULONG_MAX);
+}
+
+int lh_ptr_equal(const void *k1, const void *k2)
+{
+	return (k1 == k2);
+}
+
+/*
+ * hashlittle from lookup3.c, by Bob Jenkins, May 2006, Public Domain.
+ * http://burtleburtle.net/bob/c/lookup3.c
+ * minor modifications to make functions static so no symbols are exported
+ * minor mofifications to compile with -Werror
+ */
+
+/*
+-------------------------------------------------------------------------------
+lookup3.c, by Bob Jenkins, May 2006, Public Domain.
+
+These are functions for producing 32-bit hashes for hash table lookup.
+hashword(), hashlittle(), hashlittle2(), hashbig(), mix(), and final()
+are externally useful functions.  Routines to test the hash are included
+if SELF_TEST is defined.  You can use this free for any purpose.  It's in
+the public domain.  It has no warranty.
+
+You probably want to use hashlittle().  hashlittle() and hashbig()
+hash byte arrays.  hashlittle() is is faster than hashbig() on
+little-endian machines.  Intel and AMD are little-endian machines.
+On second thought, you probably want hashlittle2(), which is identical to
+hashlittle() except it returns two 32-bit hashes for the price of one.
+You could implement hashbig2() if you wanted but I haven't bothered here.
+
+If you want to find a hash of, say, exactly 7 integers, do
+  a = i1;  b = i2;  c = i3;
+  mix(a,b,c);
+  a += i4; b += i5; c += i6;
+  mix(a,b,c);
+  a += i7;
+  final(a,b,c);
+then use c as the hash value.  If you have a variable length array of
+4-byte integers to hash, use hashword().  If you have a byte array (like
+a character string), use hashlittle().  If you have several byte arrays, or
+a mix of things, see the comments above hashlittle().
+
+Why is this so big?  I read 12 bytes at a time into 3 4-byte integers,
+then mix those integers.  This is fast (you can do a lot more thorough
+mixing with 12*3 instructions on 3 integers than you can with 3 instructions
+on 1 byte), but shoehorning those bytes into integers efficiently is messy.
+-------------------------------------------------------------------------------
+*/
+
+/*
+ * My best guess at if you are big-endian or little-endian.  This may
+ * need adjustment.
+ */
+#if (defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && \
+     __BYTE_ORDER == __LITTLE_ENDIAN) || \
+    (defined(i386) || defined(__i386__) || defined(__i486__) || \
+     defined(__i586__) || defined(__i686__) || defined(vax) || defined(MIPSEL))
+# define HASH_LITTLE_ENDIAN 1
+# define HASH_BIG_ENDIAN 0
+#elif (defined(__BYTE_ORDER) && defined(__BIG_ENDIAN) && \
+       __BYTE_ORDER == __BIG_ENDIAN) || \
+      (defined(sparc) || defined(POWERPC) || defined(mc68000) || defined(sel))
+# define HASH_LITTLE_ENDIAN 0
+# define HASH_BIG_ENDIAN 1
+#else
+# define HASH_LITTLE_ENDIAN 0
+# define HASH_BIG_ENDIAN 0
+#endif
+
+#define hashsize(n) ((uint32_t)1<<(n))
+#define hashmask(n) (hashsize(n)-1)
+#define rot(x,k) (((x)<<(k)) | ((x)>>(32-(k))))
+
+/*
+-------------------------------------------------------------------------------
+mix -- mix 3 32-bit values reversibly.
+
+This is reversible, so any information in (a,b,c) before mix() is
+still in (a,b,c) after mix().
+
+If four pairs of (a,b,c) inputs are run through mix(), or through
+mix() in reverse, there are at least 32 bits of the output that
+are sometimes the same for one pair and different for another pair.
+This was tested for:
+* pairs that differed by one bit, by two bits, in any combination
+  of top bits of (a,b,c), or in any combination of bottom bits of
+  (a,b,c).
+* "differ" is defined as +, -, ^, or ~^.  For + and -, I transformed
+  the output delta to a Gray code (a^(a>>1)) so a string of 1's (as
+  is commonly produced by subtraction) look like a single 1-bit
+  difference.
+* the base values were pseudorandom, all zero but one bit set, or
+  all zero plus a counter that starts at zero.
+
+Some k values for my "a-=c; a^=rot(c,k); c+=b;" arrangement that
+satisfy this are
+    4  6  8 16 19  4
+    9 15  3 18 27 15
+   14  9  3  7 17  3
+Well, "9 15 3 18 27 15" didn't quite get 32 bits diffing
+for "differ" defined as + with a one-bit base and a two-bit delta.  I
+used http://burtleburtle.net/bob/hash/avalanche.html to choose
+the operations, constants, and arrangements of the variables.
+
+This does not achieve avalanche.  There are input bits of (a,b,c)
+that fail to affect some output bits of (a,b,c), especially of a.  The
+most thoroughly mixed value is c, but it doesn't really even achieve
+avalanche in c.
+
+This allows some parallelism.  Read-after-writes are good at doubling
+the number of bits affected, so the goal of mixing pulls in the opposite
+direction as the goal of parallelism.  I did what I could.  Rotates
+seem to cost as much as shifts on every machine I could lay my hands
+on, and rotates are much kinder to the top and bottom bits, so I used
+rotates.
+-------------------------------------------------------------------------------
+*/
+#define mix(a,b,c) \
+{ \
+  a -= c;  a ^= rot(c, 4);  c += b; \
+  b -= a;  b ^= rot(a, 6);  a += c; \
+  c -= b;  c ^= rot(b, 8);  b += a; \
+  a -= c;  a ^= rot(c,16);  c += b; \
+  b -= a;  b ^= rot(a,19);  a += c; \
+  c -= b;  c ^= rot(b, 4);  b += a; \
+}
+
+/*
+-------------------------------------------------------------------------------
+final -- final mixing of 3 32-bit values (a,b,c) into c
+
+Pairs of (a,b,c) values differing in only a few bits will usually
+produce values of c that look totally different.  This was tested for
+* pairs that differed by one bit, by two bits, in any combination
+  of top bits of (a,b,c), or in any combination of bottom bits of
+  (a,b,c).
+* "differ" is defined as +, -, ^, or ~^.  For + and -, I transformed
+  the output delta to a Gray code (a^(a>>1)) so a string of 1's (as
+  is commonly produced by subtraction) look like a single 1-bit
+  difference.
+* the base values were pseudorandom, all zero but one bit set, or
+  all zero plus a counter that starts at zero.
+
+These constants passed:
+ 14 11 25 16 4 14 24
+ 12 14 25 16 4 14 24
+and these came close:
+  4  8 15 26 3 22 24
+ 10  8 15 26 3 22 24
+ 11  8 15 26 3 22 24
+-------------------------------------------------------------------------------
+*/
+#define final(a,b,c) \
+{ \
+  c ^= b; c -= rot(b,14); \
+  a ^= c; a -= rot(c,11); \
+  b ^= a; b -= rot(a,25); \
+  c ^= b; c -= rot(b,16); \
+  a ^= c; a -= rot(c,4);  \
+  b ^= a; b -= rot(a,14); \
+  c ^= b; c -= rot(b,24); \
+}
+
+
+/*
+-------------------------------------------------------------------------------
+hashlittle() -- hash a variable-length key into a 32-bit value
+  k       : the key (the unaligned variable-length array of bytes)
+  length  : the length of the key, counting by bytes
+  initval : can be any 4-byte value
+Returns a 32-bit value.  Every bit of the key affects every bit of
+the return value.  Two keys differing by one or two bits will have
+totally different hash values.
+
+The best hash table sizes are powers of 2.  There is no need to do
+mod a prime (mod is sooo slow!).  If you need less than 32 bits,
+use a bitmask.  For example, if you need only 10 bits, do
+  h = (h & hashmask(10));
+In which case, the hash table should have hashsize(10) elements.
+
+If you are hashing n strings (uint8_t **)k, do it like this:
+  for (i=0, h=0; i<n; ++i) h = hashlittle( k[i], len[i], h);
+
+By Bob Jenkins, 2006.  bob_jenkins@burtleburtle.net.  You may use this
+code any way you wish, private, educational, or commercial.  It's free.
+
+Use for hash table lookup, or anything where one collision in 2^^32 is
+acceptable.  Do NOT use for cryptographic purposes.
+-------------------------------------------------------------------------------
+*/
+
+static uint32_t hashlittle( const void *key, size_t length, uint32_t initval)
+{
+  uint32_t a,b,c;                                          /* internal state */
+  union { const void *ptr; size_t i; } u;     /* needed for Mac Powerbook G4 */
+
+  /* Set up the internal state */
+  a = b = c = 0xdeadbeef + ((uint32_t)length) + initval;
+
+  u.ptr = key;
+  if (HASH_LITTLE_ENDIAN && ((u.i & 0x3) == 0)) {
+    const uint32_t *k = (const uint32_t *)key;         /* read 32-bit chunks */
+
+    /*------ all but last block: aligned reads and affect 32 bits of (a,b,c) */
+    while (length > 12)
+    {
+      a += k[0];
+      b += k[1];
+      c += k[2];
+      mix(a,b,c);
+      length -= 12;
+      k += 3;
+    }
+
+    /*----------------------------- handle the last (probably partial) block */
+    /*
+     * "k[2]&0xffffff" actually reads beyond the end of the string, but
+     * then masks off the part it's not allowed to read.  Because the
+     * string is aligned, the masked-off tail is in the same word as the
+     * rest of the string.  Every machine with memory protection I've seen
+     * does it on word boundaries, so is OK with this.  But VALGRIND will
+     * still catch it and complain.  The masking trick does make the hash
+     * noticably faster for short strings (like English words).
+     * AddressSanitizer is similarly picky about overrunning
+	 * the buffer. (http://clang.llvm.org/docs/AddressSanitizer.html
+     */
+#ifdef VALGRIND
+#    define PRECISE_MEMORY_ACCESS 1
+#elif defined(__SANITIZE_ADDRESS__) /* GCC's ASAN */
+#    define PRECISE_MEMORY_ACCESS 1
+#elif defined(__has_feature)
+#  if __has_feature(address_sanitizer) /* Clang's ASAN */
+#    define PRECISE_MEMORY_ACCESS 1
+#  endif
+#endif
+#ifndef PRECISE_MEMORY_ACCESS
+
+    switch(length)
+    {
+    case 12: c+=k[2]; b+=k[1]; a+=k[0]; break;
+    case 11: c+=k[2]&0xffffff; b+=k[1]; a+=k[0]; break;
+    case 10: c+=k[2]&0xffff; b+=k[1]; a+=k[0]; break;
+    case 9 : c+=k[2]&0xff; b+=k[1]; a+=k[0]; break;
+    case 8 : b+=k[1]; a+=k[0]; break;
+    case 7 : b+=k[1]&0xffffff; a+=k[0]; break;
+    case 6 : b+=k[1]&0xffff; a+=k[0]; break;
+    case 5 : b+=k[1]&0xff; a+=k[0]; break;
+    case 4 : a+=k[0]; break;
+    case 3 : a+=k[0]&0xffffff; break;
+    case 2 : a+=k[0]&0xffff; break;
+    case 1 : a+=k[0]&0xff; break;
+    case 0 : return c;              /* zero length strings require no mixing */
+    }
+
+#else /* make valgrind happy */
+
+    const uint8_t  *k8 = (const uint8_t *)k;
+    switch(length)
+    {
+    case 12: c+=k[2]; b+=k[1]; a+=k[0]; break;
+    case 11: c+=((uint32_t)k8[10])<<16;  /* fall through */
+    case 10: c+=((uint32_t)k8[9])<<8;    /* fall through */
+    case 9 : c+=k8[8];                   /* fall through */
+    case 8 : b+=k[1]; a+=k[0]; break;
+    case 7 : b+=((uint32_t)k8[6])<<16;   /* fall through */
+    case 6 : b+=((uint32_t)k8[5])<<8;    /* fall through */
+    case 5 : b+=k8[4];                   /* fall through */
+    case 4 : a+=k[0]; break;
+    case 3 : a+=((uint32_t)k8[2])<<16;   /* fall through */
+    case 2 : a+=((uint32_t)k8[1])<<8;    /* fall through */
+    case 1 : a+=k8[0]; break;
+    case 0 : return c;
+    }
+
+#endif /* !valgrind */
+
+  } else if (HASH_LITTLE_ENDIAN && ((u.i & 0x1) == 0)) {
+    const uint16_t *k = (const uint16_t *)key;         /* read 16-bit chunks */
+    const uint8_t  *k8;
+
+    /*--------------- all but last block: aligned reads and different mixing */
+    while (length > 12)
+    {
+      a += k[0] + (((uint32_t)k[1])<<16);
+      b += k[2] + (((uint32_t)k[3])<<16);
+      c += k[4] + (((uint32_t)k[5])<<16);
+      mix(a,b,c);
+      length -= 12;
+      k += 6;
+    }
+
+    /*----------------------------- handle the last (probably partial) block */
+    k8 = (const uint8_t *)k;
+    switch(length)
+    {
+    case 12: c+=k[4]+(((uint32_t)k[5])<<16);
+             b+=k[2]+(((uint32_t)k[3])<<16);
+             a+=k[0]+(((uint32_t)k[1])<<16);
+             break;
+    case 11: c+=((uint32_t)k8[10])<<16;     /* fall through */
+    case 10: c+=k[4];
+             b+=k[2]+(((uint32_t)k[3])<<16);
+             a+=k[0]+(((uint32_t)k[1])<<16);
+             break;
+    case 9 : c+=k8[8];                      /* fall through */
+    case 8 : b+=k[2]+(((uint32_t)k[3])<<16);
+             a+=k[0]+(((uint32_t)k[1])<<16);
+             break;
+    case 7 : b+=((uint32_t)k8[6])<<16;      /* fall through */
+    case 6 : b+=k[2];
+             a+=k[0]+(((uint32_t)k[1])<<16);
+             break;
+    case 5 : b+=k8[4];                      /* fall through */
+    case 4 : a+=k[0]+(((uint32_t)k[1])<<16);
+             break;
+    case 3 : a+=((uint32_t)k8[2])<<16;      /* fall through */
+    case 2 : a+=k[0];
+             break;
+    case 1 : a+=k8[0];
+             break;
+    case 0 : return c;                     /* zero length requires no mixing */
+    }
+
+  } else {                        /* need to read the key one byte at a time */
+    const uint8_t *k = (const uint8_t *)key;
+
+    /*--------------- all but the last block: affect some 32 bits of (a,b,c) */
+    while (length > 12)
+    {
+      a += k[0];
+      a += ((uint32_t)k[1])<<8;
+      a += ((uint32_t)k[2])<<16;
+      a += ((uint32_t)k[3])<<24;
+      b += k[4];
+      b += ((uint32_t)k[5])<<8;
+      b += ((uint32_t)k[6])<<16;
+      b += ((uint32_t)k[7])<<24;
+      c += k[8];
+      c += ((uint32_t)k[9])<<8;
+      c += ((uint32_t)k[10])<<16;
+      c += ((uint32_t)k[11])<<24;
+      mix(a,b,c);
+      length -= 12;
+      k += 12;
+    }
+
+    /*-------------------------------- last block: affect all 32 bits of (c) */
+    switch(length)                   /* all the case statements fall through */
+    {
+    case 12: c+=((uint32_t)k[11])<<24; /* FALLTHRU */
+    case 11: c+=((uint32_t)k[10])<<16; /* FALLTHRU */
+    case 10: c+=((uint32_t)k[9])<<8; /* FALLTHRU */
+    case 9 : c+=k[8]; /* FALLTHRU */
+    case 8 : b+=((uint32_t)k[7])<<24; /* FALLTHRU */
+    case 7 : b+=((uint32_t)k[6])<<16; /* FALLTHRU */
+    case 6 : b+=((uint32_t)k[5])<<8; /* FALLTHRU */
+    case 5 : b+=k[4]; /* FALLTHRU */
+    case 4 : a+=((uint32_t)k[3])<<24; /* FALLTHRU */
+    case 3 : a+=((uint32_t)k[2])<<16; /* FALLTHRU */
+    case 2 : a+=((uint32_t)k[1])<<8; /* FALLTHRU */
+    case 1 : a+=k[0];
+             break;
+    case 0 : return c;
+    }
+  }
+
+  final(a,b,c);
+  return c;
+}
+
+/* a simple hash function similiar to what perl does for strings.
+ * for good results, the string should not be excessivly large.
+ */
+static unsigned long lh_perllike_str_hash(const void *k) 
+{
+    const char *rkey = (const char *)k;
+    unsigned hashval = 1;
+
+    while (*rkey)
+        hashval = hashval * 33 + *rkey++;
+
+    return hashval;
+}
+
+static unsigned long lh_char_hash(const void *k)
+{
+#if defined _MSC_VER || defined __MINGW32__
+#define RANDOM_SEED_TYPE LONG
+#else
+#define RANDOM_SEED_TYPE int
+#endif
+	static volatile RANDOM_SEED_TYPE random_seed = -1;
+
+	if (random_seed == -1) {
+		RANDOM_SEED_TYPE seed;
+		/* we can't use -1 as it is the unitialized sentinel */
+		while ((seed = json_c_get_random_seed()) == -1);
+#if SIZEOF_INT == 8 && defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8
+#define USE_SYNC_COMPARE_AND_SWAP 1
+#endif
+#if SIZEOF_INT == 4 && defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
+#define USE_SYNC_COMPARE_AND_SWAP 1
+#endif
+#if SIZEOF_INT == 2 && defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2
+#define USE_SYNC_COMPARE_AND_SWAP 1
+#endif
+#if defined USE_SYNC_COMPARE_AND_SWAP
+		(void)__sync_val_compare_and_swap(&random_seed, -1, seed);
+#elif defined _MSC_VER || defined __MINGW32__
+		InterlockedCompareExchange(&random_seed, seed, -1);
+#else
+//#warning "racy random seed initializtion if used by multiple threads"
+		random_seed = seed; /* potentially racy */
+#endif
+	}
+
+	return hashlittle((const char*)k, strlen((const char*)k), random_seed);
+}
+
+int lh_char_equal(const void *k1, const void *k2)
+{
+	return (strcmp((const char*)k1, (const char*)k2) == 0);
+}
+
+struct lh_table* lh_table_new(int size,
+			      lh_entry_free_fn *free_fn,
+			      lh_hash_fn *hash_fn,
+			      lh_equal_fn *equal_fn)
+{
+	int i;
+	struct lh_table *t;
+
+	t = (struct lh_table*)calloc(1, sizeof(struct lh_table));
+	if (!t)
+		return NULL;
+
+	t->count = 0;
+	t->size = size;
+	t->table = (struct lh_entry*)calloc(size, sizeof(struct lh_entry));
+	if (!t->table)
+	{
+		free(t);
+		return NULL;
+	}
+	t->free_fn = free_fn;
+	t->hash_fn = hash_fn;
+	t->equal_fn = equal_fn;
+	for(i = 0; i < size; i++) t->table[i].k = LH_EMPTY;
+	return t;
+}
+
+struct lh_table* lh_kchar_table_new(int size,
+				    lh_entry_free_fn *free_fn)
+{
+	return lh_table_new(size, free_fn, char_hash_fn, lh_char_equal);
+}
+
+struct lh_table* lh_kptr_table_new(int size,
+				   lh_entry_free_fn *free_fn)
+{
+	return lh_table_new(size, free_fn, lh_ptr_hash, lh_ptr_equal);
+}
+
+int lh_table_resize(struct lh_table *t, int new_size)
+{
+	struct lh_table *new_t;
+	struct lh_entry *ent;
+
+	new_t = lh_table_new(new_size, NULL, t->hash_fn, t->equal_fn);
+	if (new_t == NULL)
+		return -1;
+
+	for (ent = t->head; ent != NULL; ent = ent->next)
+	{
+		unsigned long h = lh_get_hash(new_t, ent->k);
+		unsigned int opts = 0;
+		if (ent->k_is_constant)
+			opts = JSON_C_OBJECT_KEY_IS_CONSTANT;
+		if (lh_table_insert_w_hash(new_t, ent->k, ent->v, h, opts) != 0)
+		{
+			lh_table_free(new_t);
+			return -1;
+		}
+	}
+	free(t->table);
+	t->table = new_t->table;
+	t->size = new_size;
+	t->head = new_t->head;
+	t->tail = new_t->tail;
+	free(new_t);
+
+	return 0;
+}
+
+void lh_table_free(struct lh_table *t)
+{
+	struct lh_entry *c;
+	if(t->free_fn) {
+		for(c = t->head; c != NULL; c = c->next)
+			t->free_fn(c);
+	}
+	free(t->table);
+	free(t);
+}
+
+
+int lh_table_insert_w_hash(struct lh_table *t, const void *k, const void *v, const unsigned long h, const unsigned opts)
+{
+	unsigned long n;
+
+	if (t->count >= t->size * LH_LOAD_FACTOR)
+		if (lh_table_resize(t, t->size * 2) != 0)
+			return -1;
+
+	n = h % t->size;
+
+	while( 1 ) {
+		if(t->table[n].k == LH_EMPTY || t->table[n].k == LH_FREED) break;
+		if ((int)++n == t->size) n = 0;
+	}
+
+	t->table[n].k = k;
+	t->table[n].k_is_constant = (opts & JSON_C_OBJECT_KEY_IS_CONSTANT);
+	t->table[n].v = v;
+	t->count++;
+
+	if(t->head == NULL) {
+		t->head = t->tail = &t->table[n];
+		t->table[n].next = t->table[n].prev = NULL;
+	} else {
+		t->tail->next = &t->table[n];
+		t->table[n].prev = t->tail;
+		t->table[n].next = NULL;
+		t->tail = &t->table[n];
+	}
+
+	return 0;
+}
+int lh_table_insert(struct lh_table *t, const void *k, const void *v)
+{
+	return lh_table_insert_w_hash(t, k, v, lh_get_hash(t, k), 0);
+}
+
+
+struct lh_entry* lh_table_lookup_entry_w_hash(struct lh_table *t, const void *k, const unsigned long h)
+{
+	unsigned long n = h % t->size;
+	int count = 0;
+
+	while( count < t->size ) {
+		if(t->table[n].k == LH_EMPTY) return NULL;
+		if(t->table[n].k != LH_FREED &&
+		   t->equal_fn(t->table[n].k, k)) return &t->table[n];
+		if ((int)++n == t->size) n = 0;
+		count++;
+	}
+	return NULL;
+}
+
+struct lh_entry* lh_table_lookup_entry(struct lh_table *t, const void *k)
+{
+	return lh_table_lookup_entry_w_hash(t, k, lh_get_hash(t, k));
+}
+
+const void* lh_table_lookup(struct lh_table *t, const void *k)
+{
+	void *result;
+	lh_table_lookup_ex(t, k, &result);
+	return result;
+}
+
+json_bool lh_table_lookup_ex(struct lh_table* t, const void* k, void **v)
+{
+	struct lh_entry *e = lh_table_lookup_entry(t, k);
+	if (e != NULL) {
+		if (v != NULL) *v = lh_entry_v(e);
+		return TRUE; /* key found */
+	}
+	if (v != NULL) *v = NULL;
+		return FALSE; /* key not found */
+}
+
+int lh_table_delete_entry(struct lh_table *t, struct lh_entry *e)
+{
+	ptrdiff_t n = (ptrdiff_t)(e - t->table); /* CAW: fixed to be 64bit nice, still need the crazy negative case... */
+
+	/* CAW: this is bad, really bad, maybe stack goes other direction on this machine... */
+	if(n < 0) { return -2; }
+
+	if(t->table[n].k == LH_EMPTY || t->table[n].k == LH_FREED) return -1;
+	t->count--;
+	if(t->free_fn) t->free_fn(e);
+	t->table[n].v = NULL;
+	t->table[n].k = LH_FREED;
+	if(t->tail == &t->table[n] && t->head == &t->table[n]) {
+		t->head = t->tail = NULL;
+	} else if (t->head == &t->table[n]) {
+		t->head->next->prev = NULL;
+		t->head = t->head->next;
+	} else if (t->tail == &t->table[n]) {
+		t->tail->prev->next = NULL;
+		t->tail = t->tail->prev;
+	} else {
+		t->table[n].prev->next = t->table[n].next;
+		t->table[n].next->prev = t->table[n].prev;
+	}
+	t->table[n].next = t->table[n].prev = NULL;
+	return 0;
+}
+
+
+int lh_table_delete(struct lh_table *t, const void *k)
+{
+	struct lh_entry *e = lh_table_lookup_entry(t, k);
+	if(!e) return -1;
+	return lh_table_delete_entry(t, e);
+}
+
+int lh_table_length(struct lh_table *t)
+{
+	return t->count;
+}
diff --git a/third_party/json-c/linkhash.h b/third_party/json-c/linkhash.h
new file mode 100644
index 0000000000..9c2f5c1b25
--- /dev/null
+++ b/third_party/json-c/linkhash.h
@@ -0,0 +1,406 @@
+/*
+ * $Id: linkhash.h,v 1.6 2006/01/30 23:07:57 mclark Exp $
+ *
+ * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ * Copyright (c) 2009 Hewlett-Packard Development Company, L.P.
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+/**
+ * @file
+ * @brief Internal methods for working with json_type_object objects.  Although
+ *        this is exposed by the json_object_get_object() function and within the
+ *        json_object_iter type, it is not recommended for direct use.
+ */
+#ifndef _linkhash_h_
+#define _linkhash_h_
+
+#include "json_object.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * golden prime used in hash functions
+ */
+#define LH_PRIME 0x9e370001UL
+
+/**
+ * The fraction of filled hash buckets until an insert will cause the table
+ * to be resized.
+ * This can range from just above 0 up to 1.0.
+ */
+#define LH_LOAD_FACTOR 0.66
+
+/**
+ * sentinel pointer value for empty slots
+ */
+#define LH_EMPTY (void*)-1
+
+/**
+ * sentinel pointer value for freed slots
+ */
+#define LH_FREED (void*)-2
+
+/**
+ * default string hash function
+ */
+#define JSON_C_STR_HASH_DFLT 0
+
+/**
+ * perl-like string hash function
+ */
+#define JSON_C_STR_HASH_PERLLIKE 1
+
+/**
+ * This function sets the hash function to be used for strings.
+ * Must be one of the JSON_C_STR_HASH_* values.
+ * @returns 0 - ok, -1 if parameter was invalid
+ */
+int json_global_set_string_hash(const int h);
+
+struct lh_entry;
+
+/**
+ * callback function prototypes
+ */
+typedef void (lh_entry_free_fn) (struct lh_entry *e);
+/**
+ * callback function prototypes
+ */
+typedef unsigned long (lh_hash_fn) (const void *k);
+/**
+ * callback function prototypes
+ */
+typedef int (lh_equal_fn) (const void *k1, const void *k2);
+
+/**
+ * An entry in the hash table
+ */
+struct lh_entry {
+	/**
+	 * The key.  Use lh_entry_k() instead of accessing this directly.
+	 */
+	const void *k;
+	/**
+	 * A flag for users of linkhash to know whether or not they
+	 * need to free k.
+	 */
+	int k_is_constant;
+	/**
+	 * The value.  Use lh_entry_v() instead of accessing this directly.
+	 */
+	const void *v;
+	/**
+	 * The next entry
+	 */
+	struct lh_entry *next;
+	/**
+	 * The previous entry.
+	 */
+	struct lh_entry *prev;
+};
+
+
+/**
+ * The hash table structure.
+ */
+struct lh_table {
+	/**
+	 * Size of our hash.
+	 */
+	int size;
+	/**
+	 * Numbers of entries.
+	 */
+	int count;
+
+	/**
+	 * The first entry.
+	 */
+	struct lh_entry *head;
+
+	/**
+	 * The last entry.
+	 */
+	struct lh_entry *tail;
+
+	struct lh_entry *table;
+
+	/**
+	 * A pointer onto the function responsible for freeing an entry.
+	 */
+	lh_entry_free_fn *free_fn;
+	lh_hash_fn *hash_fn;
+	lh_equal_fn *equal_fn;
+};
+typedef struct lh_table lh_table;
+
+
+/**
+ * Convenience list iterator.
+ */
+#define lh_foreach(table, entry) \
+for(entry = table->head; entry; entry = entry->next)
+
+/**
+ * lh_foreach_safe allows calling of deletion routine while iterating.
+ *
+ * @param table a struct lh_table * to iterate over
+ * @param entry a struct lh_entry * variable to hold each element
+ * @param tmp a struct lh_entry * variable to hold a temporary pointer to the next element
+ */
+#define lh_foreach_safe(table, entry, tmp) \
+for(entry = table->head; entry && ((tmp = entry->next) || 1); entry = tmp)
+
+
+
+/**
+ * Create a new linkhash table.
+ *
+ * @param size initial table size. The table is automatically resized
+ * although this incurs a performance penalty.
+ * @param free_fn callback function used to free memory for entries
+ * when lh_table_free or lh_table_delete is called.
+ * If NULL is provided, then memory for keys and values
+ * must be freed by the caller.
+ * @param hash_fn  function used to hash keys. 2 standard ones are defined:
+ * lh_ptr_hash and lh_char_hash for hashing pointer values
+ * and C strings respectively.
+ * @param equal_fn comparison function to compare keys. 2 standard ones defined:
+ * lh_ptr_hash and lh_char_hash for comparing pointer values
+ * and C strings respectively.
+ * @return On success, a pointer to the new linkhash table is returned.
+ * 	On error, a null pointer is returned.
+ */
+extern struct lh_table* lh_table_new(int size,
+				     lh_entry_free_fn *free_fn,
+				     lh_hash_fn *hash_fn,
+				     lh_equal_fn *equal_fn);
+
+/**
+ * Convenience function to create a new linkhash table with char keys.
+ *
+ * @param size initial table size.
+ * @param free_fn callback function used to free memory for entries.
+ * @return On success, a pointer to the new linkhash table is returned.
+ * 	On error, a null pointer is returned.
+ */
+extern struct lh_table* lh_kchar_table_new(int size,
+					   lh_entry_free_fn *free_fn);
+
+
+/**
+ * Convenience function to create a new linkhash table with ptr keys.
+ *
+ * @param size initial table size.
+ * @param free_fn callback function used to free memory for entries.
+ * @return On success, a pointer to the new linkhash table is returned.
+ * 	On error, a null pointer is returned.
+ */
+extern struct lh_table* lh_kptr_table_new(int size,
+					  lh_entry_free_fn *free_fn);
+
+
+/**
+ * Free a linkhash table.
+ *
+ * If a lh_entry_free_fn callback free function was provided then it is
+ * called for all entries in the table.
+ *
+ * @param t table to free.
+ */
+extern void lh_table_free(struct lh_table *t);
+
+
+/**
+ * Insert a record into the table.
+ *
+ * @param t the table to insert into.
+ * @param k a pointer to the key to insert.
+ * @param v a pointer to the value to insert.
+ *
+ * @return On success, <code>0</code> is returned.
+ * 	On error, a negative value is returned.
+ */
+extern int lh_table_insert(struct lh_table *t, const void *k, const void *v);
+
+
+/**
+ * Insert a record into the table using a precalculated key hash.
+ *
+ * The hash h, which should be calculated with lh_get_hash() on k, is provided by
+ *  the caller, to allow for optimization when multiple operations with the same
+ *  key are known to be needed.
+ *
+ * @param t the table to insert into.
+ * @param k a pointer to the key to insert.
+ * @param v a pointer to the value to insert.
+ * @param h hash value of the key to insert
+ * @param opts if set to JSON_C_OBJECT_KEY_IS_CONSTANT, sets lh_entry.k_is_constant
+ *             so t's free function knows to avoid freeing the key.
+ */
+extern int lh_table_insert_w_hash(struct lh_table *t, const void *k, const void *v, const unsigned long h, const unsigned opts);
+
+
+/**
+ * Lookup a record in the table.
+ *
+ * @param t the table to lookup
+ * @param k a pointer to the key to lookup
+ * @return a pointer to the record structure of the value or NULL if it does not exist.
+ */
+extern struct lh_entry* lh_table_lookup_entry(struct lh_table *t, const void *k);
+
+/**
+ * Lookup a record in the table using a precalculated key hash.
+ *
+ * The hash h, which should be calculated with lh_get_hash() on k, is provided by
+ *  the caller, to allow for optimization when multiple operations with the same
+ *  key are known to be needed.
+ *
+ * @param t the table to lookup
+ * @param k a pointer to the key to lookup
+ * @param h hash value of the key to lookup
+ * @return a pointer to the record structure of the value or NULL if it does not exist.
+ */
+extern struct lh_entry* lh_table_lookup_entry_w_hash(struct lh_table *t, const void *k, const unsigned long h);
+
+/**
+ * Lookup a record into the table.
+ *
+ * @param t the table to lookup
+ * @param k a pointer to the key to lookup
+ * @return a pointer to the found value or NULL if it does not exist.
+ * @deprecated Use lh_table_lookup_ex() instead.
+ */
+THIS_FUNCTION_IS_DEPRECATED(extern const void* lh_table_lookup(struct lh_table *t, const void *k));
+
+/**
+ * Lookup a record in the table.
+ *
+ * @param t the table to lookup
+ * @param k a pointer to the key to lookup
+ * @param v a pointer to a where to store the found value (set to NULL if it doesn't exist).
+ * @return whether or not the key was found
+ */
+extern json_bool lh_table_lookup_ex(struct lh_table *t, const void *k, void **v);
+
+/**
+ * Delete a record from the table.
+ *
+ * If a callback free function is provided then it is called for the
+ * for the item being deleted.
+ * @param t the table to delete from.
+ * @param e a pointer to the entry to delete.
+ * @return 0 if the item was deleted.
+ * @return -1 if it was not found.
+ */
+extern int lh_table_delete_entry(struct lh_table *t, struct lh_entry *e);
+
+
+/**
+ * Delete a record from the table.
+ *
+ * If a callback free function is provided then it is called for the
+ * for the item being deleted.
+ * @param t the table to delete from.
+ * @param k a pointer to the key to delete.
+ * @return 0 if the item was deleted.
+ * @return -1 if it was not found.
+ */
+extern int lh_table_delete(struct lh_table *t, const void *k);
+
+extern int lh_table_length(struct lh_table *t);
+
+/**
+ * Prints a message to <code>stdout</code>,
+ * then exits the program with an exit code of <code>1</code>.
+ *
+ * @param msg Message format string, like for <code>printf</code>.
+ * @param ... Format args.
+ *
+ * @deprecated Since it is not a good idea to exit the entire program
+ * 	because of an internal library failure, json-c will no longer
+ * 	use this function internally.
+ * 	However, because its interface is public, it will remain part of
+ * 	the API on the off chance of legacy software using it externally.
+ */
+THIS_FUNCTION_IS_DEPRECATED(void lh_abort(const char *msg, ...));
+
+/**
+ * Resizes the specified table.
+ *
+ * @param t Pointer to table to resize.
+ * @param new_size New table size. Must be positive.
+ *
+ * @return On success, <code>0</code> is returned.
+ * 	On error, a negative value is returned.
+ */
+int lh_table_resize(struct lh_table *t, int new_size);
+
+
+/**
+ * @deprecated Don't use this outside of linkhash.h:
+ */
+#if !defined(_MSC_VER) || (_MSC_VER > 1800)
+/* VS2010 can't handle inline funcs, so skip it there */
+#define _LH_INLINE inline
+#else
+#define _LH_INLINE
+#endif
+
+/**
+ * Calculate the hash of a key for a given table.
+ *
+ * This is an exension to support functions that need to calculate
+ * the hash several times and allows them to do it just once and then pass
+ * in the hash to all utility functions. Depending on use case, this can be a
+ * considerable performance improvement.
+ * @param t the table (used to obtain hash function)
+ * @param k a pointer to the key to lookup
+ * @return the key's hash
+ */
+static _LH_INLINE unsigned long lh_get_hash(const struct lh_table *t, const void *k)
+{
+	return t->hash_fn(k);
+}
+
+#undef _LH_INLINE
+
+/**
+ * @deprecated Don't use this outside of linkhash.h:
+ */
+#ifdef __UNCONST
+#define _LH_UNCONST(a) __UNCONST(a)
+#else
+#define _LH_UNCONST(a) ((void *)(uintptr_t)(const void *)(a))
+#endif
+
+/**
+ * Return a non-const version of lh_entry.k.
+ *
+ * lh_entry.k is const to indicate and help ensure that linkhash itself doesn't modify
+ * it, but callers are allowed to do what they want with it.
+ * See also lh_entry.k_is_constant
+ */
+#define lh_entry_k(entry) _LH_UNCONST((entry)->k)
+
+/**
+ * Return a non-const version of lh_entry.v.
+ *
+ * v is const to indicate and help ensure that linkhash itself doesn't modify
+ * it, but callers are allowed to do what they want with it.
+ */
+#define lh_entry_v(entry) _LH_UNCONST((entry)->v)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/third_party/json-c/math_compat.h b/third_party/json-c/math_compat.h
new file mode 100644
index 0000000000..d530537b94
--- /dev/null
+++ b/third_party/json-c/math_compat.h
@@ -0,0 +1,36 @@
+#ifndef __math_compat_h
+#define __math_compat_h
+
+/**
+ * @file
+ * @brief Do not use, json-c internal, may be changed or removed at any time.
+ */
+
+/* Define isnan, isinf, infinity and nan on Windows/MSVC */
+
+#ifndef HAVE_DECL_ISNAN
+# ifdef HAVE_DECL__ISNAN
+#include <float.h>
+#define isnan(x) _isnan(x)
+# endif
+#endif
+
+#ifndef HAVE_DECL_ISINF
+# ifdef HAVE_DECL__FINITE
+#include <float.h>
+#define isinf(x) (!_finite(x))
+# endif
+#endif
+
+#ifndef HAVE_DECL_INFINITY
+#include <float.h>
+#define INFINITY (DBL_MAX + DBL_MAX)
+#define HAVE_DECL_INFINITY
+#endif
+
+#ifndef HAVE_DECL_NAN
+#define NAN (INFINITY - INFINITY)
+#define HAVE_DECL_NAN
+#endif
+
+#endif
diff --git a/third_party/json-c/printbuf.c b/third_party/json-c/printbuf.c
new file mode 100644
index 0000000000..6c77b5defd
--- /dev/null
+++ b/third_party/json-c/printbuf.c
@@ -0,0 +1,155 @@
+/*
+ * $Id: printbuf.c,v 1.5 2006/01/26 02:16:28 mclark Exp $
+ *
+ * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ *
+ * Copyright (c) 2008-2009 Yahoo! Inc.  All rights reserved.
+ * The copyrights to the contents of this file are licensed under the MIT License
+ * (http://www.opensource.org/licenses/mit-license.php)
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef HAVE_STDARG_H
+# include <stdarg.h>
+#else /* !HAVE_STDARG_H */
+# error Not enough var arg support!
+#endif /* HAVE_STDARG_H */
+
+#include "debug.h"
+#include "printbuf.h"
+#include "snprintf_compat.h"
+#include "vasprintf_compat.h"
+
+static int printbuf_extend(struct printbuf *p, int min_size);
+
+struct printbuf* printbuf_new(void)
+{
+  struct printbuf *p;
+
+  p = (struct printbuf*)calloc(1, sizeof(struct printbuf));
+  if(!p) return NULL;
+  p->size = 32;
+  p->bpos = 0;
+  if(!(p->buf = (char*)malloc(p->size))) {
+    free(p);
+    return NULL;
+  }
+  p->buf[0]= '\0';
+  return p;
+}
+
+
+/**
+ * Extend the buffer p so it has a size of at least min_size.
+ *
+ * If the current size is large enough, nothing is changed.
+ *
+ * Note: this does not check the available space!  The caller
+ *  is responsible for performing those calculations.
+ */
+static int printbuf_extend(struct printbuf *p, int min_size)
+{
+	char *t;
+	int new_size;
+
+	if (p->size >= min_size)
+		return 0;
+
+	new_size = p->size * 2;
+	if (new_size < min_size + 8)
+		new_size =  min_size + 8;
+#ifdef PRINTBUF_DEBUG
+	MC_DEBUG("printbuf_memappend: realloc "
+	  "bpos=%d min_size=%d old_size=%d new_size=%d\n",
+	  p->bpos, min_size, p->size, new_size);
+#endif /* PRINTBUF_DEBUG */
+	if(!(t = (char*)realloc(p->buf, new_size)))
+		return -1;
+	p->size = new_size;
+	p->buf = t;
+	return 0;
+}
+
+int printbuf_memappend(struct printbuf *p, const char *buf, int size)
+{
+  if (p->size <= p->bpos + size + 1) {
+    if (printbuf_extend(p, p->bpos + size + 1) < 0)
+      return -1;
+  }
+  memcpy(p->buf + p->bpos, buf, size);
+  p->bpos += size;
+  p->buf[p->bpos]= '\0';
+  return size;
+}
+
+int printbuf_memset(struct printbuf *pb, int offset, int charvalue, int len)
+{
+	int size_needed;
+
+	if (offset == -1)
+		offset = pb->bpos;
+	size_needed = offset + len;
+	if (pb->size < size_needed)
+	{
+		if (printbuf_extend(pb, size_needed) < 0)
+			return -1;
+	}
+
+	memset(pb->buf + offset, charvalue, len);
+	if (pb->bpos < size_needed)
+		pb->bpos = size_needed;
+
+	return 0;
+}
+
+int sprintbuf(struct printbuf *p, const char *msg, ...)
+{
+  va_list ap;
+  char *t;
+  int size;
+  char buf[128];
+
+  /* user stack buffer first */
+  va_start(ap, msg);
+  size = vsnprintf(buf, 128, msg, ap);
+  va_end(ap);
+  /* if string is greater than stack buffer, then use dynamic string
+     with vasprintf.  Note: some implementation of vsnprintf return -1
+     if output is truncated whereas some return the number of bytes that
+     would have been written - this code handles both cases. */
+  if(size == -1 || size > 127) {
+    va_start(ap, msg);
+    if((size = vasprintf(&t, msg, ap)) < 0) { va_end(ap); return -1; }
+    va_end(ap);
+    printbuf_memappend(p, t, size);
+    free(t);
+    return size;
+  } else {
+    printbuf_memappend(p, buf, size);
+    return size;
+  }
+}
+
+void printbuf_reset(struct printbuf *p)
+{
+  p->buf[0] = '\0';
+  p->bpos = 0;
+}
+
+void printbuf_free(struct printbuf *p)
+{
+  if(p) {
+    free(p->buf);
+    free(p);
+  }
+}
diff --git a/third_party/json-c/printbuf.h b/third_party/json-c/printbuf.h
new file mode 100644
index 0000000000..567a6a08bb
--- /dev/null
+++ b/third_party/json-c/printbuf.h
@@ -0,0 +1,122 @@
+/*
+ * $Id: printbuf.h,v 1.4 2006/01/26 02:16:28 mclark Exp $
+ *
+ * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ *
+ * Copyright (c) 2008-2009 Yahoo! Inc.  All rights reserved.
+ * The copyrights to the contents of this file are licensed under the MIT License
+ * (http://www.opensource.org/licenses/mit-license.php)
+ */
+
+/**
+ * @file
+ * @brief Internal string buffer handing.  Unless you're writing a 
+ *        json_object_to_json_string_fn implementation for use with
+ *        json_object_set_serializer() direct use of this is not
+ *        recommended.
+ */
+#ifndef _printbuf_h_
+#define _printbuf_h_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct printbuf {
+  char *buf;
+  int bpos;
+  int size;
+};
+typedef struct printbuf printbuf;
+
+extern struct printbuf*
+printbuf_new(void);
+
+/* As an optimization, printbuf_memappend_fast() is defined as a macro
+ * that handles copying data if the buffer is large enough; otherwise
+ * it invokes printbuf_memappend() which performs the heavy
+ * lifting of realloc()ing the buffer and copying data.
+ *
+ * Your code should not use printbuf_memappend() directly unless it
+ * checks the return code. Use printbuf_memappend_fast() instead.
+ */
+extern int
+printbuf_memappend(struct printbuf *p, const char *buf, int size);
+
+#define printbuf_memappend_fast(p, bufptr, bufsize)          \
+do {                                                         \
+  if ((p->size - p->bpos) > bufsize) {                       \
+    memcpy(p->buf + p->bpos, (bufptr), bufsize);             \
+    p->bpos += bufsize;                                      \
+    p->buf[p->bpos]= '\0';                                   \
+  } else {  printbuf_memappend(p, (bufptr), bufsize); }      \
+} while (0)
+
+#define printbuf_length(p) ((p)->bpos)
+
+/**
+ * Results in a compile error if the argument is not a string literal.
+ */
+#define _printbuf_check_literal(mystr) ("" mystr)
+
+/**
+ * This is an optimization wrapper around printbuf_memappend() that is useful
+ * for appending string literals. Since the size of string constants is known
+ * at compile time, using this macro can avoid a costly strlen() call. This is
+ * especially helpful when a constant string must be appended many times. If
+ * you got here because of a compilation error caused by passing something
+ * other than a string literal, use printbuf_memappend_fast() in conjunction
+ * with strlen().
+ *
+ * See also:
+ *   printbuf_memappend_fast()
+ *   printbuf_memappend()
+ *   sprintbuf()
+ */
+#define printbuf_strappend(pb, str) \
+   printbuf_memappend ((pb), _printbuf_check_literal(str), sizeof(str) - 1)
+
+/**
+ * Set len bytes of the buffer to charvalue, starting at offset offset.
+ * Similar to calling memset(x, charvalue, len);
+ *
+ * The memory allocated for the buffer is extended as necessary.
+ *
+ * If offset is -1, this starts at the end of the current data in the buffer.
+ */
+extern int
+printbuf_memset(struct printbuf *pb, int offset, int charvalue, int len);
+
+/**
+ * Formatted print to printbuf.
+ *
+ * This function is the most expensive of the available functions for appending
+ * string data to a printbuf and should be used only where convenience is more
+ * important than speed. Avoid using this function in high performance code or
+ * tight loops; in these scenarios, consider using snprintf() with a static
+ * buffer in conjunction with one of the printbuf_*append() functions.
+ *
+ * See also:
+ *   printbuf_memappend_fast()
+ *   printbuf_memappend()
+ *   printbuf_strappend()
+ */
+extern int
+sprintbuf(struct printbuf *p, const char *msg, ...);
+
+extern void
+printbuf_reset(struct printbuf *p);
+
+extern void
+printbuf_free(struct printbuf *p);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/third_party/json-c/random_seed.c b/third_party/json-c/random_seed.c
new file mode 100644
index 0000000000..32327774ad
--- /dev/null
+++ b/third_party/json-c/random_seed.c
@@ -0,0 +1,238 @@
+/*
+ * random_seed.c
+ *
+ * Copyright (c) 2013 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+#include "strerror_override.h"
+#include <stdio.h>
+#include "config.h"
+#include "random_seed.h"
+
+#define DEBUG_SEED(s)
+
+
+#if defined ENABLE_RDRAND
+
+/* cpuid */
+
+#if defined __GNUC__ && (defined __i386__ || defined __x86_64__)
+#define HAS_X86_CPUID 1
+
+static void do_cpuid(int regs[], int h)
+{
+    __asm__ __volatile__(
+#if defined __x86_64__
+                         "pushq %%rbx;\n"
+#else
+                         "pushl %%ebx;\n"
+#endif
+                         "cpuid;\n"
+#if defined __x86_64__
+                         "popq %%rbx;\n"
+#else
+                         "popl %%ebx;\n"
+#endif
+                         : "=a"(regs[0]), [ebx] "=r"(regs[1]), "=c"(regs[2]), "=d"(regs[3])
+                         : "a"(h));
+}
+
+#elif defined _MSC_VER
+
+#define HAS_X86_CPUID 1
+#define do_cpuid __cpuid
+
+#endif
+
+/* has_rdrand */
+
+#if HAS_X86_CPUID
+
+static int has_rdrand()
+{
+    // CPUID.01H:ECX.RDRAND[bit 30] == 1
+    int regs[4];
+    do_cpuid(regs, 1);
+    return (regs[2] & (1 << 30)) != 0;
+}
+
+#endif
+
+/* get_rdrand_seed - GCC x86 and X64 */
+
+#if defined __GNUC__ && (defined __i386__ || defined __x86_64__)
+
+#define HAVE_RDRAND 1
+
+static int get_rdrand_seed()
+{
+    DEBUG_SEED("get_rdrand_seed");
+    int _eax;
+    // rdrand eax
+    __asm__ __volatile__("1: .byte 0x0F\n"
+                         "   .byte 0xC7\n"
+                         "   .byte 0xF0\n"
+                         "   jnc 1b;\n"
+                         : "=a" (_eax));
+    return _eax;
+}
+
+#endif
+
+#if defined _MSC_VER
+
+#if _MSC_VER >= 1700
+#define HAVE_RDRAND 1
+
+/* get_rdrand_seed - Visual Studio 2012 and above */
+
+static int get_rdrand_seed()
+{
+    DEBUG_SEED("get_rdrand_seed");
+    int r;
+    while (_rdrand32_step(&r) == 0);
+    return r;
+}
+
+#elif defined _M_IX86
+#define HAVE_RDRAND 1
+
+/* get_rdrand_seed - Visual Studio 2010 and below - x86 only */
+
+static int get_rdrand_seed()
+{
+	DEBUG_SEED("get_rdrand_seed");
+	int _eax;
+retry:
+	// rdrand eax
+	__asm _emit 0x0F __asm _emit 0xC7 __asm _emit 0xF0
+	__asm jnc retry
+	__asm mov _eax, eax
+	return _eax;
+}
+
+#endif
+#endif
+
+#endif /* defined ENABLE_RDRAND */
+
+
+/* has_dev_urandom */
+
+#if defined (__APPLE__) || defined(__unix__) || defined(__linux__)
+
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+
+#define HAVE_DEV_RANDOM 1
+
+static const char *dev_random_file = "/dev/urandom";
+
+static int has_dev_urandom()
+{
+    struct stat buf;
+    if (stat(dev_random_file, &buf)) {
+        return 0;
+    }
+    return ((buf.st_mode & S_IFCHR) != 0);
+}
+
+
+/* get_dev_random_seed */
+
+static int get_dev_random_seed()
+{
+    DEBUG_SEED("get_dev_random_seed");
+
+    int fd = open(dev_random_file, O_RDONLY);
+    if (fd < 0) {
+        fprintf(stderr, "error opening %s: %s", dev_random_file, strerror(errno));
+        exit(1);
+    }
+
+    int r;
+    ssize_t nread = read(fd, &r, sizeof(r));
+    if (nread != sizeof(r)) {
+        fprintf(stderr, "error short read %s: %s", dev_random_file, strerror(errno));
+        exit(1);
+    }
+
+    close(fd);
+    return r;
+}
+
+#endif
+
+
+/* get_cryptgenrandom_seed */
+
+#ifdef WIN32
+
+#define HAVE_CRYPTGENRANDOM 1
+
+#include <windows.h>
+#include <wincrypt.h>
+#ifndef __GNUC__
+#pragma comment(lib, "advapi32.lib")
+#endif
+
+static int get_cryptgenrandom_seed()
+{
+    HCRYPTPROV hProvider = 0;
+    int r;
+
+    DEBUG_SEED("get_cryptgenrandom_seed");
+
+    if (!CryptAcquireContextW(&hProvider, 0, 0, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT | CRYPT_SILENT)) {
+        fprintf(stderr, "error CryptAcquireContextW");
+        exit(1);
+    }
+
+    if (!CryptGenRandom(hProvider, sizeof(r), (BYTE*)&r)) {
+        fprintf(stderr, "error CryptGenRandom");
+        exit(1);
+    }
+
+    CryptReleaseContext(hProvider, 0);
+
+    return r;
+}
+
+#endif
+
+
+/* get_time_seed */
+
+#include <time.h>
+
+static int get_time_seed()
+{
+    DEBUG_SEED("get_time_seed");
+
+    return (int)time(NULL) * 433494437;
+}
+
+
+/* json_c_get_random_seed */
+
+int json_c_get_random_seed()
+{
+#if HAVE_RDRAND
+    if (has_rdrand()) return get_rdrand_seed();
+#endif
+#if HAVE_DEV_RANDOM
+    if (has_dev_urandom()) return get_dev_random_seed();
+#endif
+#if HAVE_CRYPTGENRANDOM
+    return get_cryptgenrandom_seed();
+#endif
+    return get_time_seed();
+}
diff --git a/third_party/json-c/random_seed.h b/third_party/json-c/random_seed.h
new file mode 100644
index 0000000000..2f43dad1f3
--- /dev/null
+++ b/third_party/json-c/random_seed.h
@@ -0,0 +1,29 @@
+/*
+ * random_seed.h
+ *
+ * Copyright (c) 2013 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+/**
+ * @file
+ * @brief Do not use, json-c internal, may be changed or removed at any time.
+ */
+#ifndef seed_h
+#define seed_h
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern int json_c_get_random_seed();
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/third_party/json-c/snprintf_compat.h b/third_party/json-c/snprintf_compat.h
new file mode 100644
index 0000000000..8ca9b31c6f
--- /dev/null
+++ b/third_party/json-c/snprintf_compat.h
@@ -0,0 +1,41 @@
+#ifndef __snprintf_compat_h
+#define __snprintf_compat_h
+
+/**
+ * @file
+ * @brief Do not use, json-c internal, may be changed or removed at any time.
+ */
+
+/*
+ * Microsoft's _vsnprintf and _snprint don't always terminate
+ * the string, so use wrappers that ensure that.
+ */
+
+#include <stdarg.h>
+
+#if !defined(HAVE_SNPRINTF) && defined(_MSC_VER)
+static int json_c_vsnprintf(char *str, size_t size, const char *format, va_list ap)
+{
+	int ret;
+	ret = _vsnprintf(str, size, format, ap);
+	str[size - 1] = '\0';
+	return ret;
+}
+#define vsnprintf json_c_vsnprintf
+
+static int json_c_snprintf(char *str, size_t size, const char *format, ...)
+{
+	va_list ap;
+	int ret;
+	va_start(ap, format);
+	ret = json_c_vsnprintf(str, size, format, ap);
+	va_end(ap);
+	return ret;
+}
+#define snprintf json_c_snprintf
+
+#elif !defined(HAVE_SNPRINTF) /* !HAVE_SNPRINTF */
+# error Need vsnprintf!
+#endif /* !HAVE_SNPRINTF && defined(WIN32) */
+
+#endif /* __snprintf_compat_h */
diff --git a/third_party/json-c/strdup_compat.h b/third_party/json-c/strdup_compat.h
new file mode 100644
index 0000000000..9c523596e3
--- /dev/null
+++ b/third_party/json-c/strdup_compat.h
@@ -0,0 +1,16 @@
+#ifndef __strdup_compat_h
+#define __strdup_compat_h
+
+/**
+ * @file
+ * @brief Do not use, json-c internal, may be changed or removed at any time.
+ */
+
+#if !defined(HAVE_STRDUP) && defined(_MSC_VER)
+  /* MSC has the version as _strdup */
+# define strdup _strdup
+#elif !defined(HAVE_STRDUP)
+# error You do not have strdup on your system.
+#endif /* HAVE_STRDUP */
+
+#endif
diff --git a/third_party/json-c/strerror_override.c b/third_party/json-c/strerror_override.c
new file mode 100644
index 0000000000..90a15814cf
--- /dev/null
+++ b/third_party/json-c/strerror_override.c
@@ -0,0 +1,101 @@
+#define STRERROR_OVERRIDE_IMPL 1
+#include "strerror_override.h"
+
+/*
+ * Override strerror() to get consistent output across platforms.
+ */
+
+static struct {
+	int errno_value;
+	const char *errno_str;
+} errno_list[] = {
+#define STRINGIFY(x) #x
+#define ENTRY(x) {x, &STRINGIFY(undef_ ## x)[6]}
+	ENTRY(EPERM),
+	ENTRY(ENOENT),
+	ENTRY(ESRCH),
+	ENTRY(EINTR),
+	ENTRY(EIO),
+	ENTRY(ENXIO),
+	ENTRY(E2BIG),
+	ENTRY(ENOEXEC),
+	ENTRY(EBADF),
+	ENTRY(ECHILD),
+	ENTRY(EDEADLK),
+	ENTRY(ENOMEM),
+	ENTRY(EACCES),
+	ENTRY(EFAULT),
+#ifdef ENOTBLK
+	ENTRY(ENOTBLK),
+#endif
+	ENTRY(EBUSY),
+	ENTRY(EEXIST),
+	ENTRY(EXDEV),
+	ENTRY(ENODEV),
+	ENTRY(ENOTDIR),
+	ENTRY(EISDIR),
+	ENTRY(EINVAL),
+	ENTRY(ENFILE),
+	ENTRY(EMFILE),
+	ENTRY(ENOTTY),
+#ifdef ETXTBSY
+	ENTRY(ETXTBSY),
+#endif
+	ENTRY(EFBIG),
+	ENTRY(ENOSPC),
+	ENTRY(ESPIPE),
+	ENTRY(EROFS),
+	ENTRY(EMLINK),
+	ENTRY(EPIPE),
+	ENTRY(EDOM),
+	ENTRY(ERANGE),
+	ENTRY(EAGAIN),
+	{ 0, (char *)0 }
+};
+
+// Enabled during tests
+int _json_c_strerror_enable = 0;
+
+#define PREFIX "ERRNO="
+static char errno_buf[128] = PREFIX;
+char *_json_c_strerror(int errno_in)
+{
+	int start_idx;
+	char digbuf[20];
+	int ii, jj;
+
+	if (!_json_c_strerror_enable)
+		return strerror(errno_in);
+
+	// Avoid standard functions, so we don't need to include any
+	// headers, or guess at signatures.
+
+	for (ii = 0; errno_list[ii].errno_str != (char *)0; ii++)
+	{
+		const char *errno_str = errno_list[ii].errno_str;
+		if (errno_list[ii].errno_value != errno_in)
+			continue;
+
+		for (start_idx = sizeof(PREFIX) - 1, jj = 0; errno_str[jj] != '\0'; jj++, start_idx++)
+		{
+			errno_buf[start_idx] = errno_str[jj];
+		}
+		errno_buf[start_idx] = '\0';
+		return errno_buf;
+	}
+
+	// It's not one of the known errno values, return the numeric value.
+	for (ii = 0; errno_in > 10; errno_in /= 10, ii++)
+	{
+		digbuf[ii] = "0123456789"[(errno_in % 10)];
+	}
+	digbuf[ii] = "0123456789"[(errno_in % 10)];
+
+	// Reverse the digits
+	for (start_idx = sizeof(PREFIX) - 1 ; ii >= 0; ii--, start_idx++)
+	{
+		errno_buf[start_idx] = digbuf[ii];
+	}
+	return errno_buf;
+}
+
diff --git a/third_party/json-c/strerror_override.h b/third_party/json-c/strerror_override.h
new file mode 100644
index 0000000000..5674381804
--- /dev/null
+++ b/third_party/json-c/strerror_override.h
@@ -0,0 +1,30 @@
+#ifndef _json_strerror_override_h_
+#define _json_strerror_override_h_
+
+/**
+ * @file
+ * @brief Do not use, json-c internal, may be changed or removed at any time.
+ */
+
+#include "config.h"
+#include <errno.h>
+
+#include "json_object.h" /* for JSON_EXPORT */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <string.h>
+
+JSON_EXPORT char *_json_c_strerror(int errno_in);
+
+#ifndef STRERROR_OVERRIDE_IMPL
+#define strerror	_json_c_strerror
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _json_strerror_override_h_ */ 
diff --git a/third_party/json-c/strerror_override_private.h b/third_party/json-c/strerror_override_private.h
new file mode 100644
index 0000000000..5180b4f307
--- /dev/null
+++ b/third_party/json-c/strerror_override_private.h
@@ -0,0 +1,12 @@
+#ifndef __json_strerror_override_private_h__
+#define __json_strerror_override_private_h__
+
+/**
+ * @file
+ * @brief Do not use, json-c internal, may be changed or removed at any time.
+ */
+
+/* Used by tests to get consistent output */
+extern int _json_c_strerror_enable;
+
+#endif
diff --git a/third_party/json-c/vasprintf_compat.h b/third_party/json-c/vasprintf_compat.h
new file mode 100644
index 0000000000..43dbf8939c
--- /dev/null
+++ b/third_party/json-c/vasprintf_compat.h
@@ -0,0 +1,46 @@
+#ifndef __vasprintf_compat_h
+#define __vasprintf_compat_h
+
+/**
+ * @file
+ * @brief Do not use, json-c internal, may be changed or removed at any time.
+ */
+
+#include "snprintf_compat.h"
+
+#if !defined(HAVE_VASPRINTF)
+/* CAW: compliant version of vasprintf */
+static int vasprintf(char **buf, const char *fmt, va_list ap)
+{
+#ifndef WIN32
+	static char _T_emptybuffer = '\0';
+#endif /* !defined(WIN32) */
+	int chars;
+	char *b;
+
+	if(!buf) { return -1; }
+
+#ifdef WIN32
+	chars = _vscprintf(fmt, ap)+1;
+#else /* !defined(WIN32) */
+	/* CAW: RAWR! We have to hope to god here that vsnprintf doesn't overwrite
+	   our buffer like on some 64bit sun systems.... but hey, its time to move on */
+	chars = vsnprintf(&_T_emptybuffer, 0, fmt, ap)+1;
+	if(chars < 0) { chars *= -1; } /* CAW: old glibc versions have this problem */
+#endif /* defined(WIN32) */
+
+	b = (char*)malloc(sizeof(char)*chars);
+	if(!b) { return -1; }
+
+	if((chars = vsprintf(b, fmt, ap)) < 0)
+	{
+		free(b);
+	} else {
+		*buf = b;
+	}
+
+	return chars;
+}
+#endif /* !HAVE_VASPRINTF */
+
+#endif /* __vasprintf_compat_h */