diff --git a/third_party/lzma.js/lzip/arg_parser.cc b/third_party/lzma.js/lzip/arg_parser.cc
new file mode 100644
index 000000000..a28d2baec
--- /dev/null
+++ b/third_party/lzma.js/lzip/arg_parser.cc
@@ -0,0 +1,204 @@
+/*  Arg_parser - POSIX/GNU command line argument parser. (C++ version)
+    Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
+    Antonio Diaz Diaz.
+
+    This library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this library.  If not, see <http://www.gnu.org/licenses/>.
+
+    As a special exception, you may use this file as part of a free
+    software library without restriction.  Specifically, if other files
+    instantiate templates or use macros or inline functions from this
+    file, or you compile this file and link it with other files to
+    produce an executable, this file does not by itself cause the
+    resulting executable to be covered by the GNU General Public
+    License.  This exception does not however invalidate any other
+    reasons why the executable file might be covered by the GNU General
+    Public License.
+*/
+
+#include <cstring>
+#include <string>
+#include <vector>
+
+#include "arg_parser.h"
+
+
+bool Arg_parser::parse_long_option( const char * const opt, const char * const arg,
+                                    const Option options[], int & argind )
+  {
+  unsigned len;
+  int index = -1;
+  bool exact = false, ambig = false;
+
+  for( len = 0; opt[len+2] && opt[len+2] != '='; ++len ) ;
+
+  // Test all long options for either exact match or abbreviated matches.
+  for( int i = 0; options[i].code != 0; ++i )
+    if( options[i].name && std::strncmp( options[i].name, &opt[2], len ) == 0 )
+      {
+      if( std::strlen( options[i].name ) == len )	// Exact match found
+        { index = i; exact = true; break; }
+      else if( index < 0 ) index = i;		// First nonexact match found
+      else if( options[index].code != options[i].code ||
+               options[index].has_arg != options[i].has_arg )
+        ambig = true;			// Second or later nonexact match found
+      }
+
+  if( ambig && !exact )
+    {
+    error_ = "option '"; error_ += opt; error_ += "' is ambiguous";
+    return false;
+    }
+
+  if( index < 0 )		// nothing found
+    {
+    error_ = "unrecognized option '"; error_ += opt; error_ += '\'';
+    return false;
+    }
+
+  ++argind;
+  data.push_back( Record( options[index].code ) );
+
+  if( opt[len+2] )		// '--<long_option>=<argument>' syntax
+    {
+    if( options[index].has_arg == no )
+      {
+      error_ = "option '--"; error_ += options[index].name;
+      error_ += "' doesn't allow an argument";
+      return false;
+      }
+    if( options[index].has_arg == yes && !opt[len+3] )
+      {
+      error_ = "option '--"; error_ += options[index].name;
+      error_ += "' requires an argument";
+      return false;
+      }
+    data.back().argument = &opt[len+3];
+    return true;
+    }
+
+  if( options[index].has_arg == yes )
+    {
+    if( !arg || !arg[0] )
+      {
+      error_ = "option '--"; error_ += options[index].name;
+      error_ += "' requires an argument";
+      return false;
+      }
+    ++argind; data.back().argument = arg;
+    return true;
+    }
+
+  return true;
+  }
+
+
+bool Arg_parser::parse_short_option( const char * const opt, const char * const arg,
+                                     const Option options[], int & argind )
+  {
+  int cind = 1;			// character index in opt
+
+  while( cind > 0 )
+    {
+    int index = -1;
+    const unsigned char c = opt[cind];
+
+    if( c != 0 )
+      for( int i = 0; options[i].code; ++i )
+        if( c == options[i].code )
+          { index = i; break; }
+
+    if( index < 0 )
+      {
+      error_ = "invalid option -- "; error_ += c;
+      return false;
+      }
+
+    data.push_back( Record( c ) );
+    if( opt[++cind] == 0 ) { ++argind; cind = 0; }	// opt finished
+
+    if( options[index].has_arg != no && cind > 0 && opt[cind] )
+      {
+      data.back().argument = &opt[cind]; ++argind; cind = 0;
+      }
+    else if( options[index].has_arg == yes )
+      {
+      if( !arg || !arg[0] )
+        {
+        error_ = "option requires an argument -- "; error_ += c;
+        return false;
+        }
+      data.back().argument = arg; ++argind; cind = 0;
+      }
+    }
+  return true;
+  }
+
+
+Arg_parser::Arg_parser( const int argc, const char * const argv[],
+                        const Option options[], const bool in_order )
+  {
+  if( argc < 2 || !argv || !options ) return;
+
+  std::vector< std::string > non_options;	// skipped non-options
+  int argind = 1;				// index in argv
+
+  while( argind < argc )
+    {
+    const unsigned char ch1 = argv[argind][0];
+    const unsigned char ch2 = ( ch1 ? argv[argind][1] : 0 );
+
+    if( ch1 == '-' && ch2 )		// we found an option
+      {
+      const char * const opt = argv[argind];
+      const char * const arg = (argind + 1 < argc) ? argv[argind+1] : 0;
+      if( ch2 == '-' )
+        {
+        if( !argv[argind][2] ) { ++argind; break; }	// we found "--"
+        else if( !parse_long_option( opt, arg, options, argind ) ) break;
+        }
+      else if( !parse_short_option( opt, arg, options, argind ) ) break;
+      }
+    else
+      {
+      if( !in_order ) non_options.push_back( argv[argind++] );
+      else { data.push_back( Record() ); data.back().argument = argv[argind++]; }
+      }
+    }
+  if( error_.size() ) data.clear();
+  else
+    {
+    for( unsigned i = 0; i < non_options.size(); ++i )
+      { data.push_back( Record() ); data.back().argument.swap( non_options[i] ); }
+    while( argind < argc )
+      { data.push_back( Record() ); data.back().argument = argv[argind++]; }
+    }
+  }
+
+
+Arg_parser::Arg_parser( const char * const opt, const char * const arg,
+                        const Option options[] )
+  {
+  if( !opt || !opt[0] || !options ) return;
+
+  if( opt[0] == '-' && opt[1] )		// we found an option
+    {
+    int argind = 1;			// dummy
+    if( opt[1] == '-' )
+      { if( opt[2] ) parse_long_option( opt, arg, options, argind ); }
+    else
+      parse_short_option( opt, arg, options, argind );
+    if( error_.size() ) data.clear();
+    }
+  else { data.push_back( Record() ); data.back().argument = opt; }
+  }
diff --git a/third_party/lzma.js/lzip/arg_parser.h b/third_party/lzma.js/lzip/arg_parser.h
new file mode 100644
index 000000000..5248cb142
--- /dev/null
+++ b/third_party/lzma.js/lzip/arg_parser.h
@@ -0,0 +1,106 @@
+/*  Arg_parser - POSIX/GNU command line argument parser. (C++ version)
+    Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
+    Antonio Diaz Diaz.
+
+    This library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this library.  If not, see <http://www.gnu.org/licenses/>.
+
+    As a special exception, you may use this file as part of a free
+    software library without restriction.  Specifically, if other files
+    instantiate templates or use macros or inline functions from this
+    file, or you compile this file and link it with other files to
+    produce an executable, this file does not by itself cause the
+    resulting executable to be covered by the GNU General Public
+    License.  This exception does not however invalidate any other
+    reasons why the executable file might be covered by the GNU General
+    Public License.
+*/
+
+/*  Arg_parser reads the arguments in 'argv' and creates a number of
+    option codes, option arguments and non-option arguments.
+
+    In case of error, 'error' returns a non-empty error message.
+
+    'options' is an array of 'struct Option' terminated by an element
+    containing a code which is zero. A null name means a short-only
+    option. A code value outside the unsigned char range means a
+    long-only option.
+
+    Arg_parser normally makes it appear as if all the option arguments
+    were specified before all the non-option arguments for the purposes
+    of parsing, even if the user of your program intermixed option and
+    non-option arguments. If you want the arguments in the exact order
+    the user typed them, call 'Arg_parser' with 'in_order' = true.
+
+    The argument '--' terminates all options; any following arguments are
+    treated as non-option arguments, even if they begin with a hyphen.
+
+    The syntax for optional option arguments is '-<short_option><argument>'
+    (without whitespace), or '--<long_option>=<argument>'.
+*/
+
+class Arg_parser
+  {
+public:
+  enum Has_arg { no, yes, maybe };
+
+  struct Option
+    {
+    int code;			// Short option letter or code ( code != 0 )
+    const char * name;		// Long option name (maybe null)
+    Has_arg has_arg;
+    };
+
+private:
+  struct Record
+    {
+    int code;
+    std::string argument;
+    explicit Record( const int c = 0 ) : code( c ) {}
+    };
+
+  std::string error_;
+  std::vector< Record > data;
+
+  bool parse_long_option( const char * const opt, const char * const arg,
+                          const Option options[], int & argind );
+  bool parse_short_option( const char * const opt, const char * const arg,
+                           const Option options[], int & argind );
+
+public:
+  Arg_parser( const int argc, const char * const argv[],
+              const Option options[], const bool in_order = false );
+
+      // Restricted constructor. Parses a single token and argument (if any)
+  Arg_parser( const char * const opt, const char * const arg,
+              const Option options[] );
+
+  const std::string & error() const { return error_; }
+
+      // The number of arguments parsed (may be different from argc)
+  int arguments() const { return data.size(); }
+
+      // If code( i ) is 0, argument( i ) is a non-option.
+      // Else argument( i ) is the option's argument (or empty).
+  int code( const int i ) const
+    {
+    if( i >= 0 && i < arguments() ) return data[i].code;
+    else return 0;
+    }
+
+  const std::string & argument( const int i ) const
+    {
+    if( i >= 0 && i < arguments() ) return data[i].argument;
+    else return error_;
+    }
+  };