getopt1.c

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/* getopt_long and getopt_long_only entry points for GNU getopt.
   Copyright (C) 1987-2014 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
 
   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.
 
   The GNU C 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
   Lesser General Public License for more details.
 
   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */
␌
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
 
#ifdef _LIBC
# include <getopt.h>
#else
# include "getopt.h"
#endif
#include "getopt_int.h"
 
#include <stdio.h>
 
/* Comment out all this code if we are using the GNU C Library, and are not
   actually compiling the library itself.  This code is part of the GNU C
   Library, but also included in many other GNU distributions.  Compiling
   and linking in this code is a waste when using the GNU C library
   (especially if it is a shared library).  Rather than having every GNU
   program understand `configure --with-gnu-libc' and omit the object files,
   it is simpler to just do this in the source for each such file.  */
 
#define GETOPT_INTERFACE_VERSION 2
#if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
#include <gnu-versions.h>
#if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
#define ELIDE_CODE
#endif
#endif
 
#ifndef ELIDE_CODE
 
 
/* This needs to come after some library #include
   to get __GNU_LIBRARY__ defined.  */
#ifdef __GNU_LIBRARY__
#include <stdlib.h>
#endif
 
#ifndef NULL
#define NULL 0
#endif
 
int
getopt_long (int argc, char *const *argv, const char *options,
         const struct option *long_options, int *opt_index)
{
  return _getopt_internal (argc, argv, options, long_options, opt_index, 0, 0);
}
 
int
_getopt_long_r (int argc, char *const *argv, const char *options,
        const struct option *long_options, int *opt_index,
        struct _getopt_data *d)
{
  return _getopt_internal_r (argc, argv, options, long_options, opt_index,
                 0, d, 0);
}
 
/* Like getopt_long, but '-' as well as '--' can indicate a long option.
   If an option that starts with '-' (not '--') doesn't match a long option,
   but does match a short option, it is parsed as a short option
   instead.  */
 
int
getopt_long_only (int argc, char *const *argv, const char *options,
          const struct option *long_options, int *opt_index)
{
  return _getopt_internal (argc, argv, options, long_options, opt_index, 1, 0);
}
 
int
_getopt_long_only_r (int argc, char *const *argv, const char *options,
             const struct option *long_options, int *opt_index,
             struct _getopt_data *d)
{
  return _getopt_internal_r (argc, argv, options, long_options, opt_index,
                 1, d, 0);
}
 
#endif  /* Not ELIDE_CODE.  */
␌
#ifdef TEST
 
#include <stdio.h>
 
int
main (int argc, char **argv)
{
  int c;
  int digit_optind = 0;
 
  while (1)
    {
      int this_option_optind = optind ? optind : 1;
      int option_index = 0;
      static struct option long_options[] =
      {
    {"add", 1, 0, 0},
    {"append", 0, 0, 0},
    {"delete", 1, 0, 0},
    {"verbose", 0, 0, 0},
    {"create", 0, 0, 0},
    {"file", 1, 0, 0},
    {0, 0, 0, 0}
      };
 
      c = getopt_long (argc, argv, "abc:d:0123456789",
               long_options, &option_index);
      if (c == -1)
    break;
 
      switch (c)
    {
    case 0:
      printf ("option %s", long_options[option_index].name);
      if (optarg)
        printf (" with arg %s", optarg);
      printf ("\n");
      break;
 
    case '0':
    case '1':
    case '2':
    case '3':
    case '4':
    case '5':
    case '6':
    case '7':
    case '8':
    case '9':
      if (digit_optind != 0 && digit_optind != this_option_optind)
        printf ("digits occur in two different argv-elements.\n");
      digit_optind = this_option_optind;
      printf ("option %c\n", c);
      break;
 
    case 'a':
      printf ("option a\n");
      break;
 
    case 'b':
      printf ("option b\n");
      break;
 
    case 'c':
      printf ("option c with value `%s'\n", optarg);
      break;
 
    case 'd':
      printf ("option d with value `%s'\n", optarg);
      break;
 
    case '?':
      break;
 
    default:
      printf ("?? getopt returned character code 0%o ??\n", c);
    }
    }
 
  if (optind < argc)
    {
      printf ("non-option ARGV-elements: ");
      while (optind < argc)
    printf ("%s ", argv[optind++]);
      printf ("\n");
    }
 
  exit (0);
}
 
#endif /* TEST */