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/* This file is part of Nekopack.
Copyright (C) 2017 Jakob Tsar-Fox, All Rights Reserved.
Nekopack 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 3 of the License, or (at
your option) any later version.
Nekopack 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 Nekopack. If not, see <http://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include "cli.h"
#include "defs.h"
#define VERSION "0.1.0"
#define HELP_TEXT "A tool for decompressing the XP3 archives used by " \
"Nekopara.\n\n" \
" -h, --help\t\tDisplay this help page and " \
"exit.\n" \
" -v, --version\tDisplay the currently installed " \
"version and exit.\n\n"
/* General subroutine for parsing command-line arguments. Returns a
"configuration" structure containing everything parsed from argv. */
struct configuration parse_args(int argc, char *argv[]) {
if (argc < 2) {
fprintf(stderr, "Usage: %s (ARCHIVE PATH) [OPTIONS]\n", argv[0]);
exit(1);
}
/* The struct has to be zeroed out, otherwise argument parsing
becomes irrelevant and the program will not act as expected. */
struct configuration parsed;
memset(&parsed, 0, sizeof(parsed));
/* count represents the number of options parsed, regardless of
whether or not they were "long." This is kept track of so that
the user can supply an archive path as a positional argument. */
int current = 0, option_index = 0, count = 0;
static struct option long_options[] = {
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'v'},
{NULL, 0, NULL, 0}
};
do {
current = getopt_long(argc, argv, "hv", long_options, &option_index);
switch (current) {
case 'h':
printf("Usage: %s [OPTIONS] (ARCHIVE PATH)\n\n", argv[0]);
printf("%s\n", HELP_TEXT);
exit(EXIT_SUCCESS);
case 'v':
printf("Nekopack, version %s\nProgrammed by "
"Jakob. <http://tsar-fox.com/>\n", VERSION);
exit(EXIT_SUCCESS);
}
count++;
} while (current >= 0);
/* getopt "sorts" the argument array such that all of the flags come
first. argv[count] is the first positional argument encountered. */
if (parsed.archive_path == NULL) {
if (argv[count] == NULL) {
fprintf(stderr, "No archive path given.\n");
exit(EXIT_FAILURE);
}
parsed.archive_path = argv[count];
}
return parsed;
}
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