Mercurial > hg > octave-kai > gnulib-hg
changeset 317:b4df8eb979b6
Initial revision
author | Jim Meyering <jim@meyering.net> |
---|---|
date | Sun, 02 Oct 1994 22:50:11 +0000 |
parents | f9fa66a3a613 |
children | 35f07ea356c2 |
files | lib/long-options.c lib/long-options.h |
diffstat | 2 files changed, 90 insertions(+), 0 deletions(-) [+] |
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new file mode 100644 --- /dev/null +++ b/lib/long-options.c @@ -0,0 +1,79 @@ +/* Utility to accept --help and --version options as unobtrusively as possible. + Copyright (C) 1993, 1994 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* Jim Meyering (meyering@comco.com) */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <getopt.h> +#include "long-options.h" + +static struct option const long_options[] = +{ + {"help", no_argument, 0, 'h'}, + {"version", no_argument, 0, 'v'}, + {0, 0, 0, 0} +}; + +/* Process long options --help and --version, but only if argc == 2. + Be careful not to gobble up `--'. */ + +void +parse_long_options (argc, argv, command_name, version_string, usage) + int argc; + char **argv; + const char *command_name; + const char *version_string; + void (*usage)(); +{ + int c; + int saved_opterr; + int saved_optind; + + saved_opterr = opterr; + saved_optind = optind; + + /* Don't print an error message for unrecognized options. */ + opterr = 0; + + if (argc == 2 + && (c = getopt_long (argc, argv, "+", long_options, (int *) 0)) != EOF) + { + switch (c) + { + case 'h': + (*usage) (0); + + case 'v': + printf ("%s - %s\n", command_name, version_string); + exit (0); + + default: + /* Don't process any other long-named options. */ + break; + } + } + + /* Restore previous value. */ + opterr = saved_opterr; + + /* Restore optind in case it has advanced past a leading `--'. */ + optind = saved_optind; +}
new file mode 100644 --- /dev/null +++ b/lib/long-options.h @@ -0,0 +1,11 @@ +#ifndef __P +#if defined (__GNUC__) || (defined (__STDC__) && __STDC__) +#define __P(args) args +#else +#define __P(args) () +#endif /* GCC. */ +#endif /* Not __P. */ + +void + parse_long_options __P ((int _argc, char **_argv, const char *_command_name, + const char *_version_string, void (*_usage) (int)));