gdb/mi/mi-getopt.c

   1 /* MI Command Set - MI Option Parser.
   2    Copyright (C) 2000, 2001, 2007 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 2 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, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20    Boston, MA 02110-1301, USA.  */
  21
  22 #include "defs.h"
  23 #include "mi-getopt.h"
  24 #include "gdb_string.h"
  25
  26 int
  27 mi_getopt (const char *prefix,
  28            int argc, char **argv,
  29            struct mi_opt *opts,
  30            int *optind, char **optarg)
  31 {
  32   char *arg;
  33   struct mi_opt *opt;
  34   /* We assume that argv/argc are ok. */
  35   if (*optind > argc || *optind < 0)
  36     internal_error (__FILE__, __LINE__,
  37                     _("mi_getopt_long: optind out of bounds"));
  38   if (*optind == argc)
  39     return -1;
  40   arg = argv[*optind];
  41   /* ``--''? */
  42   if (strcmp (arg, "--") == 0)
  43     {
  44       *optind += 1;
  45       *optarg = NULL;
  46       return -1;
  47     }
  48   /* End of option list. */
  49   if (arg[0] != '-')
  50     {
  51       *optarg = NULL;
  52       return -1;
  53     }
  54   /* Look the option up. */
  55   for (opt = opts; opt->name != NULL; opt++)
  56     {
  57       if (strcmp (opt->name, arg + 1) != 0)
  58         continue;
  59       if (opt->arg_p)
  60         {
  61           /* A non-simple optarg option. */
  62           if (argc < *optind + 2)
  63             error (_("%s: Option %s requires an argument"), prefix, arg);
  64           *optarg = argv[(*optind) + 1];
  65           *optind = (*optind) + 2;
  66           return opt->index;
  67         }
  68       else
  69         {
  70           *optarg = NULL;
  71           *optind = (*optind) + 1;
  72           return opt->index;
  73         }
  74     }
  75   error (_("%s: Unknown option ``%s''"), prefix, arg + 1);
  76 }
  77
  78 int
  79 mi_valid_noargs (const char *prefix, int argc, char **argv)
  80 {
  81   int optind = 0;
  82   char *optarg;
  83   static struct mi_opt opts[] =
  84   {
  85     { 0, 0, 0 }
  86   };
  87
  88   if (mi_getopt (prefix, argc, argv, opts, &optind, &optarg) == -1)
  89     return 1;
  90   else
  91     return 0;
  92 }