mirror of
https://github.com/eddyem/eddys_snippets.git
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129 lines
3.2 KiB
C
129 lines
3.2 KiB
C
/*
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* getopt.c - simple functions for getopt_long
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* provide functions
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* usage - to show help message & exit
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* parse_args - to parce argv & fill global flags
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*
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* Copyright 2013 Edward V. Emelianoff <eddy@sao.ru>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include <getopt.h>
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#include <stdarg.h>
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/*
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* here are global variables and global data structures initialisation, like
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* int val = 10; // default value
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*/
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/*
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* HERE A PART of main.c:
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*
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setlocale(LC_ALL, "");
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setlocale(LC_NUMERIC, "C");
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bindtextdomain(GETTEXT_PACKAGE, LOCALEDIR);
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textdomain(GETTEXT_PACKAGE);
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parse_args(argc, argv); // <- set all flags
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*
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* ITS HEADER:
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#ifndef GETTEXT_PACKAGE // should be defined by make
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#define GETTEXT_PACKAGE "progname"
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#endif
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#ifndef LOCALEDIR // should be defined by make
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#define LOCALEDIR "/path/to/locale"
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#endif
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*/
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void usage(char *fmt, ...){
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va_list ap;
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va_start(ap, fmt);
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printf("\n");
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if (fmt != NULL){
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vprintf(fmt, ap);
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printf("\n\n");
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}
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va_end(ap);
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// "éÓÐÏÌØÚÏ×ÁÎÉÅ:\t%s [ÏÐÃÉÉ] [ÐÒÅÆÉËÓ ×ÙÈÏÄÎÙÈ ÆÁÊÌÏ×]\n"
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printf(_("Usage:\t%s [options] [output files prefix]\n"),
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__progname);
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// "\tïÐÃÉÉ:\n"
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printf(_("\tOptions:\n"));
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printf("\t-A,\t--author=author\t\t%s\n",
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// "Á×ÔÏÒ ÐÒÏÇÒÁÍÍÙ"
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_("program author"));
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// and so on
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exit(1);
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}
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void parse_args(int argc, char **argv){
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int i;
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char short_options[] = "A"; // all short equivalents
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struct option long_options[] = {
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/* { name, has_arg, flag, val }, where:
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* name - name of long parameter
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* has_arg = 0 - no argument, 1 - need argument, 2 - unnesessary argument
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* flag = NULL to return val, pointer to int - to set it
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* value of val (function returns 0)
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* val - getopt_long return value or value, flag setting to
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* !!! last string - for zeros !!!
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*/
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{"author", 1, 0, 'A'},
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// and so on
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{ 0, 0, 0, 0 }
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};
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if(argc == 1){
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// "îÅ ××ÅÄÅÎÏ ÎÉËÁËÉÈ ÐÁÒÁÍÅÔÒÏ×"
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usage(_("Any parameters are absent"));
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}
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while(1){
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int opt;
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if((opt = getopt_long(argc, argv, short_options,
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long_options, NULL)) == -1) break;
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switch(opt){
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case 0: // only long option
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// do something?
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break;
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case 'A':
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author = strdup(optarg);
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// "á×ÔÏÒ ÐÒÏÇÒÁÍÍÙ: %s"
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//info(_("Program author: %s"), author);
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break;
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// ...
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default:
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usage(NULL);
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}
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}
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argc -= optind;
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argv += optind;
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if(argc == 0){
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// there's no free parameters
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}else{
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/* there was free parameter
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* for example, filename
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outfile = argv[0];
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argc--;
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argv++;
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*/
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}
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if(argc > 0){
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// "éÇÎÏÒÉÒÕÀ ÁÒÇÕÍÅÎÔ[Ù]:\n"
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printf(_("Ignore argument[s]:\n"));
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for (i = 0; i < argc; i++)
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warnx("%s ", argv[i]);
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}
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}
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