gdb/mi/mi-getopt.c

   1 /* MI Command Set - MI Option Parser.
   2    Copyright (C) 2000, 2001, 2007, 2008, 2009, 2010
   3    Free Software Foundation, Inc.
   4    Contributed by Cygnus Solutions (a Red Hat company).
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include "defs.h"
  22 #include "mi-getopt.h"
  23 #include "gdb_string.h"
  24
  25 int
  26 mi_getopt (const char *prefix,
  27            int argc, char **argv,
  28            struct mi_opt *opts,
  29            int *optind, char **optarg)
  30 {
  31   char *arg;
  32   struct mi_opt *opt;
  33   /* We assume that argv/argc are ok. */
  34   if (*optind > argc || *optind < 0)
  35     internal_error (__FILE__, __LINE__,
  36                     _("mi_getopt_long: optind out of bounds"));
  37   if (*optind == argc)
  38     return -1;
  39   arg = argv[*optind];
  40   /* ``--''? */
  41   if (strcmp (arg, "--") == 0)
  42     {
  43       *optind += 1;
  44       *optarg = NULL;
  45       return -1;
  46     }
  47   /* End of option list. */
  48   if (arg[0] != '-')
  49     {
  50       *optarg = NULL;
  51       return -1;
  52     }
  53   /* Look the option up. */
  54   for (opt = opts; opt->name != NULL; opt++)
  55     {
  56       if (strcmp (opt->name, arg + 1) != 0)
  57         continue;
  58       if (opt->arg_p)
  59         {
  60           /* A non-simple optarg option. */
  61           if (argc < *optind + 2)
  62             error (_("%s: Option %s requires an argument"), prefix, arg);
  63           *optarg = argv[(*optind) + 1];
  64           *optind = (*optind) + 2;
  65           return opt->index;
  66         }
  67       else
  68         {
  69           *optarg = NULL;
  70           *optind = (*optind) + 1;
  71           return opt->index;
  72         }
  73     }
  74   error (_("%s: Unknown option ``%s''"), prefix, arg + 1);
  75 }
  76
  77 int
  78 mi_valid_noargs (const char *prefix, int argc, char **argv)
  79 {
  80   int optind = 0;
  81   char *optarg;
  82   static struct mi_opt opts[] =
  83   {
  84     { 0, 0, 0 }
  85   };
  86
  87   if (mi_getopt (prefix, argc, argv, opts, &optind, &optarg) == -1)
  88     return 1;
  89   else
  90     return 0;
  91 }