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      1 /* MI Option Parser.
      2    Copyright (C) 2000-2024 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_MI_GETOPT_H
     21 #define MI_MI_GETOPT_H
     22 
     23 /* The option list.  Terminated by NAME==NULL.  ARG_P that the option
     24    requires an argument.  INDEX is returned to identify the option.  */
     25 
     26 struct mi_opt
     27   {
     28     const char *name;
     29     int index;
     30     int arg_p;
     31   };
     32 
     33 /* Like getopt() but with simpler semantics.
     34 
     35    An option has the form ``-<name>''. The special option ``--''
     36    denotes the end of the option list. An option can be followed by a
     37    separate argument (on a per option basis).
     38 
     39    On entry OPTIND contains the index of the next element of ARGV that
     40    needs parsing.  OPTIND is updated to indicate the index of the next
     41    argument before mi_getopt() returns.
     42 
     43    If ARGV[OPTIND] is an option, that options INDEX is returned.
     44    OPTARG is set to the options argument or NULL.  OPTIND is updated.
     45 
     46    If ARGV[OPTIND] is not an option, -1 is returned and OPTIND updated
     47    to specify the non-option argument.  OPTARG is set to NULL.
     48 
     49    If an unknown option is encountered, mi_getopt() calls
     50    ``error("%s: Unknown option %c", prefix, option)'' while
     51    mi_getopt_allow_unknown returns -1.  */
     52 
     53 extern int mi_getopt (const char *prefix, int argc, const char *const *argv,
     54 		      const struct mi_opt *opt, int *optind,
     55 		      const char **optarg);
     56 extern int mi_getopt_allow_unknown (const char *prefix, int argc,
     57 				    const char *const *argv,
     58 				    const struct mi_opt *opts,
     59 				    int *oind, const char **oarg);
     60 
     61 /* mi_valid_noargs determines if ARGC/ARGV are a valid set of
     62    parameters to satisfy an MI function that is not supposed to
     63    receive any arguments.
     64 
     65    An MI function that should not receive arguments can still be
     66    passed parameters after the special option '--' such as below.
     67 
     68    Example: The MI function -exec-run takes no args.
     69    However, the client may pass '-exec-run -- -a ...'
     70    See PR-783
     71 
     72    PREFIX is passed to mi_getopt for an error message.
     73 
     74    This function Returns 1 if the parameter pair ARGC/ARGV are valid
     75    for an MI function that takes no arguments. Otherwise, it returns 0
     76    and the appropriate error message is displayed by mi_getopt.  */
     77 
     78 extern int mi_valid_noargs (const char *prefix, int argc,
     79 			    const char *const *argv);
     80 
     81 #endif /* MI_MI_GETOPT_H */
     82