gdb/mi/mi-getopt.c

   1 /* MI Command Set - MI Option Parser.
   2    Copyright (C) 2000, 2001, 2007, 2008 Free Software Foundation, Inc.
   3    Contributed by Cygnus Solutions (a Red Hat company).
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21 #include "mi-getopt.h"
  22 #include "gdb_string.h"
  23
  24 int
  25 mi_getopt (const char *prefix,
  26            int argc, char **argv,
  27            struct mi_opt *opts,
  28            int *optind, char **optarg)
  29 {
  30   char *arg;
  31   struct mi_opt *opt;
  32   /* We assume that argv/argc are ok. */
  33   if (*optind > argc || *optind < 0)
  34     internal_error (__FILE__, __LINE__,
  35                     _("mi_getopt_long: optind out of bounds"));
  36   if (*optind == argc)
  37     return -1;
  38   arg = argv[*optind];
  39   /* ``--''? */
  40   if (strcmp (arg, "--") == 0)
  41     {
  42       *optind += 1;
  43       *optarg = NULL;
  44       return -1;
  45     }
  46   /* End of option list. */
  47   if (arg[0] != '-')
  48     {
  49       *optarg = NULL;
  50       return -1;
  51     }
  52   /* Look the option up. */
  53   for (opt = opts; opt->name != NULL; opt++)
  54     {
  55       if (strcmp (opt->name, arg + 1) != 0)
  56         continue;
  57       if (opt->arg_p)
  58         {
  59           /* A non-simple optarg option. */
  60           if (argc < *optind + 2)
  61             error (_("%s: Option %s requires an argument"), prefix, arg);
  62           *optarg = argv[(*optind) + 1];
  63           *optind = (*optind) + 2;
  64           return opt->index;
  65         }
  66       else
  67         {
  68           *optarg = NULL;
  69           *optind = (*optind) + 1;
  70           return opt->index;
  71         }
  72     }
  73   error (_("%s: Unknown option ``%s''"), prefix, arg + 1);
  74 }
  75
  76 int
  77 mi_valid_noargs (const char *prefix, int argc, char **argv)
  78 {
  79   int optind = 0;
  80   char *optarg;
  81   static struct mi_opt opts[] =
  82   {
  83     { 0, 0, 0 }
  84   };
  85
  86   if (mi_getopt (prefix, argc, argv, opts, &optind, &optarg) == -1)
  87     return 1;
  88   else
  89     return 0;
  90 }