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getopt1.c

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00001 /* getopt_long and getopt_long_only entry points for GNU getopt.
00002    Copyright (C) 1987, 88, 89, 90, 91, 92, 1993, 1994
00003     Free Software Foundation, Inc.
00004 
00005    This program is free software; you can redistribute it and/or modify it
00006    under the terms of the GNU General Public License as published by the
00007    Free Software Foundation; either version 2, or (at your option) any
00008    later version.
00009 
00010    This program is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013    GNU General Public License for more details.
00014 
00015    You should have received a copy of the GNU General Public License
00016    along with this program; if not, write to the Free Software
00017    Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
00018 
00019 #ifdef HAVE_CONFIG_H
00020 #include "config.h"
00021 #endif
00022 
00023 #include "getopt.h"
00024 
00025 #if !defined (__STDC__) || !__STDC__
00026 /* This is a separate conditional since some stdc systems
00027    reject `defined (const)'.  */
00028 #ifndef const
00029 #define const
00030 #endif
00031 #endif
00032 
00033 #include <stdio.h>
00034 
00035 /* Comment out all this code if we are using the GNU C Library, and are not
00036    actually compiling the library itself.  This code is part of the GNU C
00037    Library, but also included in many other GNU distributions.  Compiling
00038    and linking in this code is a waste when using the GNU C library
00039    (especially if it is a shared library).  Rather than having every GNU
00040    program understand `configure --with-gnu-libc' and omit the object files,
00041    it is simpler to just do this in the source for each such file.  */
00042 
00043 #if defined (_LIBC) || !defined (__GNU_LIBRARY__)
00044 
00045 
00046 /* This needs to come after some library #include
00047    to get __GNU_LIBRARY__ defined.  */
00048 #ifdef __GNU_LIBRARY__
00049 #include <stdlib.h>
00050 #else
00051 char *getenv ();
00052 #endif
00053 
00054 #ifndef NULL
00055 #define NULL 0
00056 #endif
00057 
00058 int
00059 getopt_long (argc, argv, options, long_options, opt_index)
00060      int argc;
00061      char *const *argv;
00062      const char *options;
00063      const struct option *long_options;
00064      int *opt_index;
00065 {
00066   return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
00067 }
00068 
00069 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
00070    If an option that starts with '-' (not '--') doesn't match a long option,
00071    but does match a short option, it is parsed as a short option
00072    instead.  */
00073 
00074 int
00075 getopt_long_only (argc, argv, options, long_options, opt_index)
00076      int argc;
00077      char *const *argv;
00078      const char *options;
00079      const struct option *long_options;
00080      int *opt_index;
00081 {
00082   return _getopt_internal (argc, argv, options, long_options, opt_index, 1);
00083 }
00084 
00085 
00086 #endif  /* _LIBC or not __GNU_LIBRARY__.  */
00087 
00088 #ifdef TEST
00089 
00090 #include <stdio.h>
00091 
00092 int
00093 main (argc, argv)
00094      int argc;
00095      char **argv;
00096 {
00097   int c;
00098   int digit_optind = 0;
00099 
00100   while (1)
00101     {
00102       int this_option_optind = optind ? optind : 1;
00103       int option_index = 0;
00104       static struct option long_options[] =
00105       {
00106     {"add", 1, 0, 0},
00107     {"append", 0, 0, 0},
00108     {"delete", 1, 0, 0},
00109     {"verbose", 0, 0, 0},
00110     {"create", 0, 0, 0},
00111     {"file", 1, 0, 0},
00112     {0, 0, 0, 0}
00113       };
00114 
00115       c = getopt_long (argc, argv, "abc:d:0123456789",
00116                long_options, &option_index);
00117       if (c == EOF)
00118     break;
00119 
00120       switch (c)
00121     {
00122     case 0:
00123       printf ("option %s", long_options[option_index].name);
00124       if (optarg)
00125         printf (" with arg %s", optarg);
00126       printf ("\n");
00127       break;
00128 
00129     case '0':
00130     case '1':
00131     case '2':
00132     case '3':
00133     case '4':
00134     case '5':
00135     case '6':
00136     case '7':
00137     case '8':
00138     case '9':
00139       if (digit_optind != 0 && digit_optind != this_option_optind)
00140         printf ("digits occur in two different argv-elements.\n");
00141       digit_optind = this_option_optind;
00142       printf ("option %c\n", c);
00143       break;
00144 
00145     case 'a':
00146       printf ("option a\n");
00147       break;
00148 
00149     case 'b':
00150       printf ("option b\n");
00151       break;
00152 
00153     case 'c':
00154       printf ("option c with value `%s'\n", optarg);
00155       break;
00156 
00157     case 'd':
00158       printf ("option d with value `%s'\n", optarg);
00159       break;
00160 
00161     case '?':
00162       break;
00163 
00164     default:
00165       printf ("?? getopt returned character code 0%o ??\n", c);
00166     }
00167     }
00168 
00169   if (optind < argc)
00170     {
00171       printf ("non-option ARGV-elements: ");
00172       while (optind < argc)
00173     printf ("%s ", argv[optind++]);
00174       printf ("\n");
00175     }
00176 
00177   exit (0);
00178 }
00179 
00180 #endif /* TEST */

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