gdb/mi/mi-getopt.c

   1 /* MI Command Set - MI Option Parser.
   2    Copyright (C) 2000-2013 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            const struct mi_opt *opts,
  28            int *oind, char **oarg)
  29 {
  30   char *arg;
  31   const struct mi_opt *opt;
  32
  33   /* We assume that argv/argc are ok.  */
  34   if (*oind > argc || *oind < 0)
  35     internal_error (__FILE__, __LINE__,
  36                     _("mi_getopt_long: oind out of bounds"));
  37   if (*oind == argc)
  38     return -1;
  39   arg = argv[*oind];
  40   /* ``--''? */
  41   if (strcmp (arg, "--") == 0)
  42     {
  43       *oind += 1;
  44       *oarg = NULL;
  45       return -1;
  46     }
  47   /* End of option list.  */
  48   if (arg[0] != '-')
  49     {
  50       *oarg = 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 oarg option.  */
  61           if (argc < *oind + 2)
  62             error (_("%s: Option %s requires an argument"), prefix, arg);
  63           *oarg = argv[(*oind) + 1];
  64           *oind = (*oind) + 2;
  65           return opt->index;
  66         }
  67       else
  68         {
  69           *oarg = NULL;
  70           *oind = (*oind) + 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 oind = 0;
  81   char *oarg;
  82   static const struct mi_opt opts[] =
  83     {
  84       { 0, 0, 0 }
  85     };
  86
  87   if (mi_getopt (prefix, argc, argv, opts, &oind, &oarg) == -1)
  88     return 1;
  89   else
  90     return 0;
  91 }