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-rw-r--r--carg_parser.c291
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+/* Arg_parser - A POSIX/GNU command line argument parser. (C version)
+ Copyright (C) 2006, 2007, 2008, 2009, 2010 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];
+ const char code_str[2] = { code, 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 "";
+ }
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