Merging upstream version 1.3.

Signed-off-by: Daniel Baumann <mail@daniel-baumann.ch>

1 files changed, 294 insertions, 0 deletions

diff --git a/carg_parser.c b/carg_parser.c
new file mode 100644
index 0000000..326bd41
--- /dev/null
+++ b/carg_parser.c
@@ -0,0 +1,294 @@
+/*  Arg_parser - POSIX/GNU command line argument parser. (C version)
+    Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012
+    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 <stdlib.h>
+#include <string.h>
+
+#include "carg_parser.h"
+
+
+/* assure at least a minimum size for buffer 'buf' */
+static void * ap_resize_buffer( void * buf, const int min_size )
+  {
+  if( buf ) buf = realloc( buf, min_size );
+  else buf = malloc( min_size );
+  return buf;
+  }
+
+
+static char push_back_record( struct Arg_parser * const ap,
+                              const int code, const char * const argument )
+  {
+  const int len = strlen( argument );
+  struct ap_Record *p;
+  void * tmp = ap_resize_buffer( ap->data,
+                 ( ap->data_size + 1 ) * sizeof (struct ap_Record) );
+  if( !tmp ) return 0;
+  ap->data = (struct ap_Record *)tmp;
+  p = &(ap->data[ap->data_size]);
+  p->code = code;
+  p->argument = 0;
+  tmp = ap_resize_buffer( p->argument, len + 1 );
+  if( !tmp ) return 0;
+  p->argument = (char *)tmp;
+  strncpy( p->argument, argument, len + 1 );
+  ++ap->data_size;
+  return 1;
+  }
+
+
+static char add_error( struct Arg_parser * const ap, const char * const msg )
+  {
+  const int len = strlen( msg );
+  void * tmp = ap_resize_buffer( ap->error, ap->error_size + len + 1 );
+  if( !tmp ) return 0;
+  ap->error = (char *)tmp;
+  strncpy( ap->error + ap->error_size, msg, len + 1 );
+  ap->error_size += len;
+  return 1;
+  }
+
+
+static void free_data( struct Arg_parser * const ap )
+  {
+  int i;
+  for( i = 0; i < ap->data_size; ++i ) free( ap->data[i].argument );
+  if( ap->data ) { free( ap->data ); ap->data = 0; }
+  ap->data_size = 0;
+  }
+
+
+static char parse_long_option( struct Arg_parser * const ap,
+                               const char * const opt, const char * const arg,
+                               const struct ap_Option options[],
+                               int * const argindp )
+  {
+  unsigned int len;
+  int index = -1;
+  int i;
+  char exact = 0, ambig = 0;
+
+  for( len = 0; opt[len+2] && opt[len+2] != '='; ++len ) ;
+
+  /* Test all long options for either exact match or abbreviated matches. */
+  for( i = 0; options[i].code != 0; ++i )
+    if( options[i].name && !strncmp( options[i].name, &opt[2], len ) )
+      {
+      if( strlen( options[i].name ) == len )	/* Exact match found */
+        { index = i; exact = 1; 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 = 1;			/* Second or later nonexact match found */
+      }
+
+  if( ambig && !exact )
+    {
+    add_error( ap, "option '" ); add_error( ap, opt );
+    add_error( ap, "' is ambiguous" );
+    return 1;
+    }
+
+  if( index < 0 )		/* nothing found */
+    {
+    add_error( ap, "unrecognized option '" ); add_error( ap, opt );
+    add_error( ap, "'" );
+    return 1;
+    }
+
+  ++*argindp;
+
+  if( opt[len+2] )		/* '--<long_option>=<argument>' syntax */
+    {
+    if( options[index].has_arg == ap_no )
+      {
+      add_error( ap, "option '--" ); add_error( ap, options[index].name );
+      add_error( ap, "' doesn't allow an argument" );
+      return 1;
+      }
+    if( options[index].has_arg == ap_yes && !opt[len+3] )
+      {
+      add_error( ap, "option '--" ); add_error( ap, options[index].name );
+      add_error( ap, "' requires an argument" );
+      return 1;
+      }
+    return push_back_record( ap, options[index].code, &opt[len+3] );
+    }
+
+  if( options[index].has_arg == ap_yes )
+    {
+    if( !arg || !arg[0] )
+      {
+      add_error( ap, "option '--" ); add_error( ap, options[index].name );
+      add_error( ap, "' requires an argument" );
+      return 1;
+      }
+    ++*argindp;
+    return push_back_record( ap, options[index].code, arg );
+    }
+
+  return push_back_record( ap, options[index].code, "" );
+  }
+
+
+static char parse_short_option( struct Arg_parser * const ap,
+                                const char * const opt, const char * const arg,
+                                const struct ap_Option options[],
+                                int * const argindp )
+  {
+  int cind = 1;			/* character index in opt */
+
+  while( cind > 0 )
+    {
+    int index = -1;
+    int i;
+    const unsigned char code = opt[cind];
+    char code_str[2];
+    code_str[0] = code; code_str[1] = 0;
+
+    if( code != 0 )
+      for( i = 0; options[i].code; ++i )
+        if( code == options[i].code )
+          { index = i; break; }
+
+    if( index < 0 )
+      {
+      add_error( ap, "invalid option -- " ); add_error( ap, code_str );
+      return 1;
+      }
+
+    if( opt[++cind] == 0 ) { ++*argindp; cind = 0; }	/* opt finished */
+
+    if( options[index].has_arg != ap_no && cind > 0 && opt[cind] )
+      {
+      if( !push_back_record( ap, code, &opt[cind] ) ) return 0;
+      ++*argindp; cind = 0;
+      }
+    else if( options[index].has_arg == ap_yes )
+      {
+      if( !arg || !arg[0] )
+        {
+        add_error( ap, "option requires an argument -- " );
+        add_error( ap, code_str );
+        return 1;
+        }
+      ++*argindp; cind = 0;
+      if( !push_back_record( ap, code, arg ) ) return 0;
+      }
+    else if( !push_back_record( ap, code, "" ) ) return 0;
+    }
+  return 1;
+  }
+
+
+char ap_init( struct Arg_parser * const ap,
+              const int argc, const char * const argv[],
+              const struct ap_Option options[], const char in_order )
+  {
+  const char ** non_options = 0;	/* skipped non-options */
+  int non_options_size = 0;		/* number of skipped non-options */
+  int argind = 1;			/* index in argv */
+  int i;
+
+  ap->data = 0;
+  ap->error = 0;
+  ap->data_size = 0;
+  ap->error_size = 0;
+  if( argc < 2 || !argv || !options ) return 1;
+
+  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( ap, opt, arg, options, &argind ) ) return 0;
+        }
+      else if( !parse_short_option( ap, opt, arg, options, &argind ) ) return 0;
+      if( ap->error ) break;
+      }
+    else
+      {
+      if( !in_order )
+        {
+        void * tmp = ap_resize_buffer( non_options,
+                       ( non_options_size + 1 ) * sizeof *non_options );
+        if( !tmp ) return 0;
+        non_options = (const char **)tmp;
+        non_options[non_options_size++] = argv[argind++];
+        }
+      else if( !push_back_record( ap, 0, argv[argind++] ) ) return 0;
+      }
+    }
+  if( ap->error ) free_data( ap );
+  else
+    {
+    for( i = 0; i < non_options_size; ++i )
+      if( !push_back_record( ap, 0, non_options[i] ) ) return 0;
+    while( argind < argc )
+      if( !push_back_record( ap, 0, argv[argind++] ) ) return 0;
+    }
+  if( non_options ) free( non_options );
+  return 1;
+  }
+
+
+void ap_free( struct Arg_parser * const ap )
+  {
+  free_data( ap );
+  if( ap->error ) { free( ap->error ); ap->error = 0; }
+  ap->error_size = 0;
+  }
+
+
+const char * ap_error( const struct Arg_parser * const ap )
+  { return ap->error; }
+
+
+int ap_arguments( const struct Arg_parser * const ap )
+  { return ap->data_size; }
+
+
+int ap_code( const struct Arg_parser * const ap, const int i )
+  {
+  if( i >= 0 && i < ap_arguments( ap ) ) return ap->data[i].code;
+  else return 0;
+  }
+
+
+const char * ap_argument( const struct Arg_parser * const ap, const int i )
+  {
+  if( i >= 0 && i < ap_arguments( ap ) ) return ap->data[i].argument;
+  else return "";
+  }