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/* geml - General extendable macro language
* args_parser.c Program arguments parser
*
* Copyright (C) 2016 Karel Kočí
*
* 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
* of the License, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <getopt.h>
#include "args_parser.h"
#include "utils.h"
#include "io.h"
const char *help_text =
"Usage: geml [OPTIONS]... INPUT_FILE\n"
" General extendable macro language processing tool.\n"
"\n"
"Options:\n"
" -v, --verbose\n"
" Increases vebosity of output.\n"
" -q, --quiet\n"
" Dcreases verbosity of output.\n"
" -o, --output OUTPUT_FILE\n"
" Sets file in which output is going to be stored\n"
" -h, --help\n"
" Prints this text.\n"
" --version\n"
" Prints geml version\n"
"\n"
"Report bugs to: <" GEML_CONTACT ">\n"
;
const char *version_text = "geml " GEML_VERSION "\n";
enum ARGS_ENUM {
ARGS_ENUM_VERSION = 260
};
const struct option long_options[] = {
{"verbose", no_argument, NULL, 'v'},
{"quiet", no_argument, NULL, 'q'},
{"output", required_argument, NULL, 'o'},
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, ARGS_ENUM_VERSION}
};
bool args_parse(int argc, char *argv[]) {
char *output = NULL;
int index = 1;
int c;
while((c = getopt_long(argc, argv, "vqo:h;", long_options, &index)) != -1) {
switch (c) {
case 'v': // verbose
verbosity_inc();
break;
case 'q': // quiet
verbosity_dec();
break;
case 'o': // output
output = optarg;
break;
case 'h': // help
fputs(help_text, stderr);
return true;
case ARGS_ENUM_VERSION:
fputs(version_text, stderr);
return true;
default:
abort();
}
}
if (optind < argc) {
if (!set_input(argv[optind]))
abort();
if ((argc - optind) > 1)
WARN("Only first input file is accepted, rest is dropped.");
}
if (output != NULL && !set_output(output))
abort();
return false;
}
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