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releases-comm-central/third_party/json-c/json_object.c

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C
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/*
* 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>
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#include <math.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "arraylist.h"
#include "debug.h"
#include "json_inttypes.h"
#include "json_object.h"
#include "json_object_private.h"
#include "json_util.h"
#include "linkhash.h"
#include "math_compat.h"
#include "printbuf.h"
#include "snprintf_compat.h"
#include "strdup_compat.h"
/* Avoid ctype.h and locale overhead */
#define is_plain_digit(c) ((c) >= '0' && (c) <= '9')
#if SIZEOF_LONG_LONG != SIZEOF_INT64_T
#error The long long type is not 64-bits
#endif
#ifndef SSIZE_T_MAX
#if SIZEOF_SSIZE_T == SIZEOF_INT
#define SSIZE_T_MAX INT_MAX
#elif SIZEOF_SSIZE_T == SIZEOF_LONG
#define SSIZE_T_MAX LONG_MAX
#elif SIZEOF_SSIZE_T == SIZEOF_LONG_LONG
#define SSIZE_T_MAX LLONG_MAX
#else
#error Unable to determine size of ssize_t
#endif
#endif
const char *json_number_chars = "0123456789.+-eE"; /* Unused, but part of public API, drop for 1.0 */
const char *json_hex_chars = "0123456789abcdefABCDEF";
static void json_object_generic_delete(struct json_object *jso);
#if defined(_MSC_VER) && (_MSC_VER <= 1800)
/* VS2013 doesn't know about "inline" */
#define inline __inline
#elif defined(AIX_CC)
#define inline
#endif
/* define colors */
#define ANSI_COLOR_RESET "\033[0m"
#define ANSI_COLOR_FG_GREEN "\033[0;32m"
#define ANSI_COLOR_FG_BLUE "\033[0;34m"
#define ANSI_COLOR_FG_MAGENTA "\033[0;35m"
/*
* Helper functions to more safely cast to a particular type of json_object
*/
static inline struct json_object_object *JC_OBJECT(struct json_object *jso)
{
return (void *)jso;
}
static inline const struct json_object_object *JC_OBJECT_C(const struct json_object *jso)
{
return (const void *)jso;
}
static inline struct json_object_array *JC_ARRAY(struct json_object *jso)
{
return (void *)jso;
}
static inline const struct json_object_array *JC_ARRAY_C(const struct json_object *jso)
{
return (const void *)jso;
}
static inline struct json_object_boolean *JC_BOOL(struct json_object *jso)
{
return (void *)jso;
}
static inline const struct json_object_boolean *JC_BOOL_C(const struct json_object *jso)
{
return (const void *)jso;
}
static inline struct json_object_double *JC_DOUBLE(struct json_object *jso)
{
return (void *)jso;
}
static inline const struct json_object_double *JC_DOUBLE_C(const struct json_object *jso)
{
return (const void *)jso;
}
static inline struct json_object_int *JC_INT(struct json_object *jso)
{
return (void *)jso;
}
static inline const struct json_object_int *JC_INT_C(const struct json_object *jso)
{
return (const void *)jso;
}
static inline struct json_object_string *JC_STRING(struct json_object *jso)
{
return (void *)jso;
}
static inline const struct json_object_string *JC_STRING_C(const struct json_object *jso)
{
return (const void *)jso;
}
#define JC_CONCAT(a, b) a##b
#define JC_CONCAT3(a, b, c) a##b##c
#define JSON_OBJECT_NEW(jtype) \
(struct JC_CONCAT(json_object_, jtype) *)json_object_new( \
JC_CONCAT(json_type_, jtype), sizeof(struct JC_CONCAT(json_object_, jtype)), \
&JC_CONCAT3(json_object_, jtype, _to_json_string))
static inline struct json_object *json_object_new(enum json_type o_type, size_t alloc_size,
json_object_to_json_string_fn *to_json_string);
static void json_object_object_delete(struct json_object *jso_base);
static void json_object_string_delete(struct json_object *jso);
static void json_object_array_delete(struct json_object *jso);
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;
static json_object_to_json_string_fn _json_object_userdata_to_json_string;
#ifndef JSON_NORETURN
#if defined(_MSC_VER)
#define JSON_NORETURN __declspec(noreturn)
#elif defined(__OS400__)
#define JSON_NORETURN
#else
/* 'cold' attribute is for optimization, telling the computer this code
* path is unlikely.
*/
#define JSON_NORETURN __attribute__((noreturn, cold))
#endif
#endif
/**
* Abort and optionally print a message on standard error.
* This should be used rather than assert() for unconditional abortion
* (in particular for code paths which are never supposed to be run).
* */
JSON_NORETURN static void json_abort(const char *message);
/* helper for accessing the optimized string data component in json_object
*/
static inline char *get_string_component_mutable(struct json_object *jso)
{
if (JC_STRING_C(jso)->len < 0)
{
/* Due to json_object_set_string(), we might have a pointer */
return JC_STRING(jso)->c_string.pdata;
}
return JC_STRING(jso)->c_string.idata;
}
static inline const char *get_string_component(const struct json_object *jso)
{
return get_string_component_mutable((void *)(uintptr_t)(const void *)jso);
}
/* string escaping */
static int json_escape_str(struct printbuf *pb, const char *str, size_t len, int flags)
{
size_t pos = 0, start_offset = 0;
unsigned char c;
while (len)
{
--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)
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)
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)
printbuf_memappend(pb, str + start_offset, pos - start_offset);
return 0;
}
/* reference counting */
struct json_object *json_object_get(struct json_object *jso)
{
if (!jso)
return jso;
// Don't overflow the refcounter.
assert(jso->_ref_count < UINT32_MAX);
#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);
switch (jso->o_type)
{
case json_type_object: json_object_object_delete(jso); break;
case json_type_array: json_object_array_delete(jso); break;
case json_type_string: json_object_string_delete(jso); break;
default: json_object_generic_delete(jso); break;
}
return 1;
}
/* generic object construction and destruction parts */
static void json_object_generic_delete(struct json_object *jso)
{
printbuf_free(jso->_pb);
free(jso);
}
static inline struct json_object *json_object_new(enum json_type o_type, size_t alloc_size,
json_object_to_json_string_fn *to_json_string)
{
struct json_object *jso;
jso = (struct json_object *)malloc(alloc_size);
if (!jso)
return NULL;
jso->o_type = o_type;
jso->_ref_count = 1;
jso->_to_json_string = to_json_string;
jso->_pb = NULL;
jso->_user_delete = NULL;
jso->_userdata = NULL;
//jso->... // Type-specific fields must be set by caller
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, "{" /*}*/);
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 && !(flags & JSON_C_TO_STRING_PRETTY))
printbuf_strappend(pb, " ");
indent(pb, level + 1, flags);
if (flags & JSON_C_TO_STRING_COLOR)
printbuf_strappend(pb, ANSI_COLOR_FG_BLUE);
printbuf_strappend(pb, "\"");
json_escape_str(pb, iter.key, strlen(iter.key), flags);
printbuf_strappend(pb, "\"");
if (flags & JSON_C_TO_STRING_COLOR)
printbuf_strappend(pb, ANSI_COLOR_RESET);
if (flags & JSON_C_TO_STRING_SPACED)
printbuf_strappend(pb, ": ");
else
printbuf_strappend(pb, ":");
if (iter.val == NULL) {
if (flags & JSON_C_TO_STRING_COLOR)
printbuf_strappend(pb, ANSI_COLOR_FG_MAGENTA);
printbuf_strappend(pb, "null");
if (flags & JSON_C_TO_STRING_COLOR)
printbuf_strappend(pb, ANSI_COLOR_RESET);
} else if (iter.val->_to_json_string(iter.val, pb, level + 1, flags) < 0)
return -1;
}
if ((flags & JSON_C_TO_STRING_PRETTY) && had_children)
{
printbuf_strappend(pb, "\n");
indent(pb, level, flags);
}
if (flags & JSON_C_TO_STRING_SPACED && !(flags & JSON_C_TO_STRING_PRETTY))
return printbuf_strappend(pb, /*{*/ " }");
else
return printbuf_strappend(pb, /*{*/ "}");
}
static void json_object_lh_entry_free(struct lh_entry *ent)
{
if (!lh_entry_k_is_constant(ent))
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_base)
{
lh_table_free(JC_OBJECT(jso_base)->c_object);
json_object_generic_delete(jso_base);
}
struct json_object *json_object_new_object(void)
{
struct json_object_object *jso = JSON_OBJECT_NEW(object);
if (!jso)
return NULL;
jso->c_object =
lh_kchar_table_new(JSON_OBJECT_DEF_HASH_ENTRIES, &json_object_lh_entry_free);
if (!jso->c_object)
{
json_object_generic_delete(&jso->base);
errno = ENOMEM;
return NULL;
}
return &jso->base;
}
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 JC_OBJECT_C(jso)->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(JC_OBJECT(jso)->c_object, (const void *)key);
existing_entry =
(opts & JSON_C_OBJECT_ADD_KEY_IS_NEW)
? NULL
: lh_table_lookup_entry_w_hash(JC_OBJECT(jso)->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_ADD_CONSTANT_KEY) ? (const void *)key : strdup(key);
if (k == NULL)
return -1;
return lh_table_insert_w_hash(JC_OBJECT(jso)->c_object, k, val, hash, opts);
}
existing_value = (json_object *)lh_entry_v(existing_entry);
if (existing_value)
json_object_put(existing_value);
lh_entry_set_val(existing_entry, 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(JC_OBJECT_C(jso)->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 0;
switch (jso->o_type)
{
case json_type_object:
return lh_table_lookup_ex(JC_OBJECT_C(jso)->c_object, (const void *)key,
(void **)value);
default:
if (value != NULL)
*value = NULL;
return 0;
}
}
void json_object_object_del(struct json_object *jso, const char *key)
{
assert(json_object_get_type(jso) == json_type_object);
lh_table_delete(JC_OBJECT(jso)->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)
{
int ret;
if (flags & JSON_C_TO_STRING_COLOR)
printbuf_strappend(pb, ANSI_COLOR_FG_MAGENTA);
if (JC_BOOL(jso)->c_boolean)
ret = printbuf_strappend(pb, "true");
else
ret = printbuf_strappend(pb, "false");
if (ret > -1 && flags & JSON_C_TO_STRING_COLOR)
return printbuf_strappend(pb, ANSI_COLOR_RESET);
return ret;
}
struct json_object *json_object_new_boolean(json_bool b)
{
struct json_object_boolean *jso = JSON_OBJECT_NEW(boolean);
if (!jso)
return NULL;
jso->c_boolean = b;
return &jso->base;
}
json_bool json_object_get_boolean(const struct json_object *jso)
{
if (!jso)
return 0;
switch (jso->o_type)
{
case json_type_boolean: return JC_BOOL_C(jso)->c_boolean;
case json_type_int:
switch (JC_INT_C(jso)->cint_type)
{
case json_object_int_type_int64: return (JC_INT_C(jso)->cint.c_int64 != 0);
case json_object_int_type_uint64: return (JC_INT_C(jso)->cint.c_uint64 != 0);
default: json_abort("invalid cint_type");
}
case json_type_double: return (JC_DOUBLE_C(jso)->c_double != 0);
case json_type_string: return (JC_STRING_C(jso)->len != 0);
default: return 0;
}
}
int json_object_set_boolean(struct json_object *jso, json_bool new_value)
{
if (!jso || jso->o_type != json_type_boolean)
return 0;
JC_BOOL(jso)->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];
if (JC_INT(jso)->cint_type == json_object_int_type_int64)
snprintf(sbuf, sizeof(sbuf), "%" PRId64, JC_INT(jso)->cint.c_int64);
else
snprintf(sbuf, sizeof(sbuf), "%" PRIu64, JC_INT(jso)->cint.c_uint64);
return printbuf_memappend(pb, sbuf, strlen(sbuf));
}
struct json_object *json_object_new_int(int32_t i)
{
return json_object_new_int64(i);
}
int32_t json_object_get_int(const struct json_object *jso)
{
int64_t cint64 = 0;
double cdouble;
enum json_type o_type;
if (!jso)
return 0;
o_type = jso->o_type;
if (o_type == json_type_int)
{
const struct json_object_int *jsoint = JC_INT_C(jso);
if (jsoint->cint_type == json_object_int_type_int64)
{
cint64 = jsoint->cint.c_int64;
}
else
{
if (jsoint->cint.c_uint64 >= INT64_MAX)
cint64 = INT64_MAX;
else
cint64 = (int64_t)jsoint->cint.c_uint64;
}
}
else 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:
cdouble = JC_DOUBLE_C(jso)->c_double;
if (cdouble <= INT32_MIN)
return INT32_MIN;
if (cdouble >= INT32_MAX)
return INT32_MAX;
return (int32_t)cdouble;
case json_type_boolean: return JC_BOOL_C(jso)->c_boolean;
default: return 0;
}
}
int json_object_set_int(struct json_object *jso, int new_value)
{
return json_object_set_int64(jso, (int64_t)new_value);
}
struct json_object *json_object_new_int64(int64_t i)
{
struct json_object_int *jso = JSON_OBJECT_NEW(int);
if (!jso)
return NULL;
jso->cint.c_int64 = i;
jso->cint_type = json_object_int_type_int64;
return &jso->base;
}
struct json_object *json_object_new_uint64(uint64_t i)
{
struct json_object_int *jso = JSON_OBJECT_NEW(int);
if (!jso)
return NULL;
jso->cint.c_uint64 = i;
jso->cint_type = json_object_int_type_uint64;
return &jso->base;
}
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:
{
const struct json_object_int *jsoint = JC_INT_C(jso);
switch (jsoint->cint_type)
{
case json_object_int_type_int64: return jsoint->cint.c_int64;
case json_object_int_type_uint64:
if (jsoint->cint.c_uint64 >= INT64_MAX)
return INT64_MAX;
return (int64_t)jsoint->cint.c_uint64;
default: json_abort("invalid cint_type");
}
}
case json_type_double:
// INT64_MAX can't be exactly represented as a double
// so cast to tell the compiler it's ok to round up.
if (JC_DOUBLE_C(jso)->c_double >= (double)INT64_MAX)
return INT64_MAX;
if (JC_DOUBLE_C(jso)->c_double <= INT64_MIN)
return INT64_MIN;
return (int64_t)JC_DOUBLE_C(jso)->c_double;
case json_type_boolean: return JC_BOOL_C(jso)->c_boolean;
case json_type_string:
if (json_parse_int64(get_string_component(jso), &cint) == 0)
return cint;
/* FALLTHRU */
default: return 0;
}
}
uint64_t json_object_get_uint64(const struct json_object *jso)
{
uint64_t cuint;
if (!jso)
return 0;
switch (jso->o_type)
{
case json_type_int:
{
const struct json_object_int *jsoint = JC_INT_C(jso);
switch (jsoint->cint_type)
{
case json_object_int_type_int64:
if (jsoint->cint.c_int64 < 0)
return 0;
return (uint64_t)jsoint->cint.c_int64;
case json_object_int_type_uint64: return jsoint->cint.c_uint64;
default: json_abort("invalid cint_type");
}
}
case json_type_double:
// UINT64_MAX can't be exactly represented as a double
// so cast to tell the compiler it's ok to round up.
if (JC_DOUBLE_C(jso)->c_double >= (double)UINT64_MAX)
return UINT64_MAX;
if (JC_DOUBLE_C(jso)->c_double < 0)
return 0;
return (uint64_t)JC_DOUBLE_C(jso)->c_double;
case json_type_boolean: return JC_BOOL_C(jso)->c_boolean;
case json_type_string:
if (json_parse_uint64(get_string_component(jso), &cuint) == 0)
return cuint;
/* 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;
JC_INT(jso)->cint.c_int64 = new_value;
JC_INT(jso)->cint_type = json_object_int_type_int64;
return 1;
}
int json_object_set_uint64(struct json_object *jso, uint64_t new_value)
{
if (!jso || jso->o_type != json_type_int)
return 0;
JC_INT(jso)->cint.c_uint64 = new_value;
JC_INT(jso)->cint_type = json_object_int_type_uint64;
return 1;
}
int json_object_int_inc(struct json_object *jso, int64_t val)
{
struct json_object_int *jsoint;
if (!jso || jso->o_type != json_type_int)
return 0;
jsoint = JC_INT(jso);
switch (jsoint->cint_type)
{
case json_object_int_type_int64:
if (val > 0 && jsoint->cint.c_int64 > INT64_MAX - val)
{
jsoint->cint.c_uint64 = (uint64_t)jsoint->cint.c_int64 + (uint64_t)val;
jsoint->cint_type = json_object_int_type_uint64;
}
else if (val < 0 && jsoint->cint.c_int64 < INT64_MIN - val)
{
jsoint->cint.c_int64 = INT64_MIN;
}
else
{
jsoint->cint.c_int64 += val;
}
return 1;
case json_object_int_type_uint64:
if (val > 0 && jsoint->cint.c_uint64 > UINT64_MAX - (uint64_t)val)
{
jsoint->cint.c_uint64 = UINT64_MAX;
}
else if (val < 0 && jsoint->cint.c_uint64 < (uint64_t)(-val))
{
jsoint->cint.c_int64 = (int64_t)jsoint->cint.c_uint64 + val;
jsoint->cint_type = json_object_int_type_int64;
}
else if (val < 0 && jsoint->cint.c_uint64 >= (uint64_t)(-val))
{
jsoint->cint.c_uint64 -= (uint64_t)(-val);
}
else
{
jsoint->cint.c_uint64 += val;
}
return 1;
default: json_abort("invalid cint_type");
}
}
/* 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);
if (double_format)
{
char *p = strdup(double_format);
if (p == NULL)
{
_json_c_set_last_err("json_c_set_serialization_double_format: "
"out of memory\n");
return -1;
}
global_serialization_float_format = p;
}
else
{
global_serialization_float_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;
}
if (double_format)
{
char *p = strdup(double_format);
if (p == NULL)
{
_json_c_set_last_err("json_c_set_serialization_double_format: "
"out of memory\n");
return -1;
}
tls_serialization_float_format = p;
}
else
{
tls_serialization_float_format = NULL;
}
#else
_json_c_set_last_err("json_c_set_serialization_double_format: not compiled "
"with __thread support\n");
return -1;
#endif
}
else
{
_json_c_set_last_err("json_c_set_serialization_double_format: 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)
{
struct json_object_double *jsodbl = JC_DOUBLE(jso);
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(jsodbl->c_double))
{
size = snprintf(buf, sizeof(buf), "NaN");
}
else if (isinf(jsodbl->c_double))
{
if (jsodbl->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;
int looks_numeric = 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, jsodbl->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;
looks_numeric = /* Looks like *some* kind of number */
is_plain_digit(buf[0]) || (size > 1 && buf[0] == '-' && is_plain_digit(buf[1]));
if (size < (int)sizeof(buf) - 2 && looks_numeric && !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 */
if (*p != 0)
*(++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_double *jso = JSON_OBJECT_NEW(double);
if (!jso)
return NULL;
jso->base._to_json_string = &json_object_double_to_json_string_default;
jso->c_double = d;
return &jso->base;
}
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;
}
/*
* A wrapper around json_object_userdata_to_json_string() used only
* by json_object_new_double_s() just so json_object_set_double() can
* detect when it needs to reset the serializer to the default.
*/
static int _json_object_userdata_to_json_string(struct json_object *jso, struct printbuf *pb,
int level, int flags)
{
return json_object_userdata_to_json_string(jso, pb, level, flags);
}
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 JC_DOUBLE_C(jso)->c_double;
case json_type_int:
switch (JC_INT_C(jso)->cint_type)
{
case json_object_int_type_int64: return JC_INT_C(jso)->cint.c_int64;
case json_object_int_type_uint64: return JC_INT_C(jso)->cint.c_uint64;
default: json_abort("invalid cint_type");
}
case json_type_boolean: return JC_BOOL_C(jso)->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))
{
errno = EINVAL;
return 0.0;
}
/*
* Check that the conversion terminated on something sensible
*
* For example, { "pay" : 123AB } would parse as 123.
*/
if (*errPtr != '\0')
{
errno = EINVAL;
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: errno = EINVAL; 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;
JC_DOUBLE(jso)->c_double = new_value;
if (jso->_to_json_string == &_json_object_userdata_to_json_string)
json_object_set_serializer(jso, NULL, NULL, NULL);
return 1;
}
/* json_object_string */
static int json_object_string_to_json_string(struct json_object *jso, struct printbuf *pb,
int level, int flags)
{
ssize_t len = JC_STRING(jso)->len;
if (flags & JSON_C_TO_STRING_COLOR)
printbuf_strappend(pb, ANSI_COLOR_FG_GREEN);
printbuf_strappend(pb, "\"");
json_escape_str(pb, get_string_component(jso), len < 0 ? -(ssize_t)len : len, flags);
printbuf_strappend(pb, "\"");
if (flags & JSON_C_TO_STRING_COLOR)
printbuf_strappend(pb, ANSI_COLOR_RESET);
return 0;
}
static void json_object_string_delete(struct json_object *jso)
{
if (JC_STRING(jso)->len < 0)
free(JC_STRING(jso)->c_string.pdata);
json_object_generic_delete(jso);
}
static struct json_object *_json_object_new_string(const char *s, const size_t len)
{
size_t objsize;
struct json_object_string *jso;
/*
* Structures Actual memory layout
* ------------------- --------------------
* [json_object_string [json_object_string
* [json_object] [json_object]
* ...other fields... ...other fields...
* c_string] len
* bytes
* of
* string
* data
* \0]
*/
if (len > (SSIZE_T_MAX - (sizeof(*jso) - sizeof(jso->c_string)) - 1))
return NULL;
objsize = (sizeof(*jso) - sizeof(jso->c_string)) + len + 1;
if (len < sizeof(void *))
// We need a minimum size to support json_object_set_string() mutability
// so we can stuff a pointer into pdata :(
objsize += sizeof(void *) - len;
jso = (struct json_object_string *)json_object_new(json_type_string, objsize,
&json_object_string_to_json_string);
if (!jso)
return NULL;
jso->len = len;
memcpy(jso->c_string.idata, s, len);
// Cast below needed for Clang UB sanitizer
((char *)jso->c_string.idata)[len] = '\0';
return &jso->base;
}
struct json_object *json_object_new_string(const char *s)
{
return _json_object_new_string(s, strlen(s));
}
struct json_object *json_object_new_string_len(const char *s, const int len)
{
return _json_object_new_string(s, len);
}
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);
}
}
static inline ssize_t _json_object_get_string_len(const struct json_object_string *jso)
{
ssize_t len;
len = jso->len;
return (len < 0) ? -(ssize_t)len : len;
}
int json_object_get_string_len(const struct json_object *jso)
{
if (!jso)
return 0;
switch (jso->o_type)
{
case json_type_string: return _json_object_get_string_len(JC_STRING_C(jso));
default: return 0;
}
}
static int _json_object_set_string_len(json_object *jso, const char *s, size_t len)
{
char *dstbuf;
ssize_t curlen;
ssize_t newlen;
if (jso == NULL || jso->o_type != json_type_string)
return 0;
if (len >= INT_MAX - 1)
// jso->len is a signed ssize_t, so it can't hold the
// full size_t range. json_object_get_string_len returns
// length as int, cap length at INT_MAX.
return 0;
curlen = JC_STRING(jso)->len;
if (curlen < 0) {
if (len == 0) {
free(JC_STRING(jso)->c_string.pdata);
JC_STRING(jso)->len = curlen = 0;
} else {
curlen = -curlen;
}
}
newlen = len;
dstbuf = get_string_component_mutable(jso);
if ((ssize_t)len > curlen)
{
// We have no way to return the new ptr from realloc(jso, newlen)
// and we have no way of knowing whether there's extra room available
// so we need to stuff a pointer in to pdata :(
dstbuf = (char *)malloc(len + 1);
if (dstbuf == NULL)
return 0;
if (JC_STRING(jso)->len < 0)
free(JC_STRING(jso)->c_string.pdata);
JC_STRING(jso)->c_string.pdata = dstbuf;
newlen = -(ssize_t)len;
}
else if (JC_STRING(jso)->len < 0)
{
// We've got enough room in the separate allocated buffer,
// so use it as-is and continue to indicate that pdata is used.
newlen = -(ssize_t)len;
}
memcpy(dstbuf, (const void *)s, len);
dstbuf[len] = '\0';
JC_STRING(jso)->len = newlen;
return 1;
}
int json_object_set_string(json_object *jso, const char *s)
{
return _json_object_set_string_len(jso, s, strlen(s));
}
int json_object_set_string_len(json_object *jso, const char *s, int len)
{
return _json_object_set_string_len(jso, s, len);
}
/* 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, "[");
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 && !(flags & JSON_C_TO_STRING_PRETTY))
printbuf_strappend(pb, " ");
indent(pb, level + 1, flags);
val = json_object_array_get_idx(jso, ii);
if (val == NULL) {
if (flags & JSON_C_TO_STRING_COLOR)
printbuf_strappend(pb, ANSI_COLOR_FG_MAGENTA);
printbuf_strappend(pb, "null");
if (flags & JSON_C_TO_STRING_COLOR)
printbuf_strappend(pb, ANSI_COLOR_RESET);
} else if (val->_to_json_string(val, pb, level + 1, flags) < 0)
return -1;
}
if ((flags & JSON_C_TO_STRING_PRETTY) && had_children)
{
printbuf_strappend(pb, "\n");
indent(pb, level, flags);
}
if (flags & JSON_C_TO_STRING_SPACED && !(flags & JSON_C_TO_STRING_PRETTY))
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(JC_ARRAY(jso)->c_array);
json_object_generic_delete(jso);
}
struct json_object *json_object_new_array(void)
{
return json_object_new_array_ext(ARRAY_LIST_DEFAULT_SIZE);
}
struct json_object *json_object_new_array_ext(int initial_size)
{
struct json_object_array *jso = JSON_OBJECT_NEW(array);
if (!jso)
return NULL;
jso->c_array = array_list_new2(&json_object_array_entry_free, initial_size);
if (jso->c_array == NULL)
{
free(jso);
return NULL;
}
return &jso->base;
}
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 JC_ARRAY_C(jso)->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(JC_ARRAY(jso)->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,
JC_ARRAY_C(jso)->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(JC_ARRAY_C(jso)->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(JC_ARRAY(jso)->c_array, val);
}
int json_object_array_insert_idx(struct json_object *jso, size_t idx, struct json_object *val)
{
assert(json_object_get_type(jso) == json_type_array);
return array_list_insert_idx(JC_ARRAY(jso)->c_array, idx, 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(JC_ARRAY(jso)->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(JC_ARRAY(jso)->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(JC_ARRAY_C(jso)->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;
}
int json_object_array_shrink(struct json_object *jso, int empty_slots)
{
if (empty_slots < 0)
json_abort("json_object_array_shrink called with negative empty_slots");
return array_list_shrink(JC_ARRAY(jso)->c_array, empty_slots);
}
struct json_object *json_object_new_null(void)
{
return NULL;
}
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(JC_OBJECT(jso2)->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(JC_OBJECT(jso1)->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 (JC_BOOL(jso1)->c_boolean == JC_BOOL(jso2)->c_boolean);
case json_type_double: return (JC_DOUBLE(jso1)->c_double == JC_DOUBLE(jso2)->c_double);
case json_type_int:
{
struct json_object_int *int1 = JC_INT(jso1);
struct json_object_int *int2 = JC_INT(jso2);
if (int1->cint_type == json_object_int_type_int64)
{
if (int2->cint_type == json_object_int_type_int64)
return (int1->cint.c_int64 == int2->cint.c_int64);
if (int1->cint.c_int64 < 0)
return 0;
return ((uint64_t)int1->cint.c_int64 == int2->cint.c_uint64);
}
// else jso1 is a uint64
if (int2->cint_type == json_object_int_type_uint64)
return (int1->cint.c_uint64 == int2->cint.c_uint64);
if (int2->cint.c_int64 < 0)
return 0;
return (int1->cint.c_uint64 == (uint64_t)int2->cint.c_int64);
}
case json_type_string:
{
return (_json_object_get_string_len(JC_STRING(jso1)) ==
_json_object_get_string_len(JC_STRING(jso2)) &&
memcmp(get_string_component(jso1), get_string_component(jso2),
_json_object_get_string_len(JC_STRING(jso1))) == 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->_to_json_string == _json_object_userdata_to_json_string)
{
char *p;
assert(src->_userdata);
p = strdup(src->_userdata);
if (p == NULL)
{
_json_c_set_last_err("json_object_copy_serializer_data: out of memory\n");
return -1;
}
dst->_userdata = p;
}
// else if ... other supported serializers ...
else
{
_json_c_set_last_err(
"json_object_copy_serializer_data: unable to copy unknown serializer data: "
"%p\n", (void *)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(JC_BOOL(src)->c_boolean); break;
case json_type_double: *dst = json_object_new_double(JC_DOUBLE(src)->c_double); break;
case json_type_int:
switch (JC_INT(src)->cint_type)
{
case json_object_int_type_int64:
*dst = json_object_new_int64(JC_INT(src)->cint.c_int64);
break;
case json_object_int_type_uint64:
*dst = json_object_new_uint64(JC_INT(src)->cint.c_uint64);
break;
default: json_abort("invalid cint_type");
}
break;
case json_type_string:
*dst = json_object_new_string_len(get_string_component(src),
_json_object_get_string_len(JC_STRING(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, UINT_MAX,
&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, UINT_MAX, dst, shallow_copy);
if (rc < 0)
{
json_object_put(*dst);
*dst = NULL;
}
return rc;
}
static void json_abort(const char *message)
{
if (message != NULL)
fprintf(stderr, "json-c aborts with error: %s\n", message);
abort();
}
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