getopt1.c

bison 2.0 主要可以用来做语法分析用的

/* getopt_long and getopt_long_only entry points for GNU getopt.
   Copyright (C) 1987,88,89,90,91,92,93,94,96,97,98,2004
     Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   This program 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 2, or (at your option)
   any later version.

   This program 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 program; if not, write to the Free Software Foundation,
   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#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>

/* 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 *__getopt_argv_const *argv, const char *options,
	     const struct option *long_options, int *opt_index)
{
  return _getopt_internal (argc, (char **) argv, options, long_options,
			   opt_index, 0, 0);
}

int
_getopt_long_r (int argc, char **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, 0, d);
}

/* 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 *__getopt_argv_const *argv,
		  const char *options,
		  const struct option *long_options, int *opt_index)
{
  return _getopt_internal (argc, (char **) argv, options, long_options,
			   opt_index, 1, 0);
}

int
_getopt_long_only_r (int argc, char **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, 0, d);
}


#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 */