/* MI Command Set - MI Option Parser.
   Copyright (C) 2000, 2001, 2007, 2008, 2009, 2010
   Free Software Foundation, Inc.
   Contributed by Cygnus Solutions (a Red Hat company).

   This file is part of GDB.

   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 3 of the License, 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, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"
#include "mi-getopt.h"
#include "gdb_string.h"

int
mi_getopt (const char *prefix,
	   int argc, char **argv,
	   struct mi_opt *opts,
	   int *optind, char **optarg)
{
  char *arg;
  struct mi_opt *opt;

  /* We assume that argv/argc are ok. */
  if (*optind > argc || *optind < 0)
    internal_error (__FILE__, __LINE__,
		    _("mi_getopt_long: optind out of bounds"));
  if (*optind == argc)
    return -1;
  arg = argv[*optind];
  /* ``--''? */
  if (strcmp (arg, "--") == 0)
    {
      *optind += 1;
      *optarg = NULL;
      return -1;
    }
  /* End of option list. */
  if (arg[0] != '-')
    {
      *optarg = NULL;
      return -1;
    }
  /* Look the option up. */
  for (opt = opts; opt->name != NULL; opt++)
    {
      if (strcmp (opt->name, arg + 1) != 0)
	continue;
      if (opt->arg_p)
	{
	  /* A non-simple optarg option. */
	  if (argc < *optind + 2)
	    error (_("%s: Option %s requires an argument"), prefix, arg);
	  *optarg = argv[(*optind) + 1];
	  *optind = (*optind) + 2;
	  return opt->index;
	}
      else
	{
	  *optarg = NULL;
	  *optind = (*optind) + 1;
	  return opt->index;
	}
    }
  error (_("%s: Unknown option ``%s''"), prefix, arg + 1);
}

int 
mi_valid_noargs (const char *prefix, int argc, char **argv) 
{
  int optind = 0;
  char *optarg;
  static struct mi_opt opts[] =
  {
    { 0, 0, 0 }
  };

  if (mi_getopt (prefix, argc, argv, opts, &optind, &optarg) == -1)
    return 1;
  else
    return 0;
}