gdb/mi/mi-getopt.h

   1 /* MI Option Parser.
   2    Copyright (C) 2000, 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 #ifndef MI_GETOPT_H
  21 #define MI_GETOPT_H
  22
  23 /* Like getopt() but with simpler semantics.
  24
  25    An option has the form ``-<name>''. The special option ``--''
  26    denotes the end of the option list. An option can be followed by a
  27    separate argument (on a per option basis).
  28
  29    On entry OPTIND contains the index of the next element of ARGV that
  30    needs parsing.  OPTIND is updated to indicate the index of the next
  31    argument before mi_getopt() returns.
  32
  33    If ARGV[OPTIND] is an option, that options INDEX is returned.
  34    OPTARG is set to the options argument or NULL.  OPTIND is updated.
  35
  36    If ARGV[OPTIND] is not an option, -1 is returned and OPTIND updated
  37    to specify the non-option argument.  OPTARG is set to NULL.
  38
  39    mi_getopt() calls ``error("%s: Unknown option %c", prefix,
  40    option)'' if an unknown option is encountered. */
  41
  42 struct mi_opt;
  43 extern int mi_getopt (const char *prefix, int argc, char **argv,
  44                       struct mi_opt *opt, int *optind, char **optarg);
  45
  46 /* The option list.  Terminated by NAME==NULL.  ARG_P that the option
  47    requires an argument.  INDEX is returned to identify th option. */
  48
  49 struct mi_opt
  50   {
  51     const char *name;
  52     int index;
  53     int arg_p;
  54   };
  55
  56 struct mi_opt;
  57
  58 /* mi_valid_noargs
  59
  60    Determines if ARGC/ARGV are a valid set of parameters to satisfy
  61    an MI function that is not supposed to recieve any arguments.
  62
  63    An MI function that should not recieve arguments can still be
  64    passed parameters after the special option '--' such as below.
  65
  66    Example: The MI function -exec-run takes no args.
  67    However, the client may pass '-exec-run -- -a ...'
  68    See PR-783
  69
  70    PREFIX is passed to mi_getopt for an error message.
  71
  72    This function Returns 1 if the parameter pair ARGC/ARGV are valid
  73    for an MI function that takes no arguments. Otherwise, it returns 0
  74    and the appropriate error message is displayed by mi_getopt.  */
  75
  76 extern int mi_valid_noargs (const char *prefix, int argc, char **argv);
  77
  78 #endif