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/* cli.c -- Code for providing a command-line interface.
Copyright (C) 2017 Jakob Kreuze, All Rights Reserved.
This file is part of Nekopack.
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 <stdlib.h>
#include <string.h>
#include <getopt.h>
#include "cli.h"
#include "crypto.h"
/* Copies `optarg` into the out field of `p` and ensures that it ends in
a trailing path delimiter. */
static void parse_output_path(const char *optarg, struct params *p) {
p->out_len = strlen(optarg);
p->out = malloc(p->out_len + 2);
strcpy(p->out, optarg);
if (p->out[p->out_len - 1] != '/') {
p->out[p->out_len] = '/';
p->out_len += 1;
}
}
/* Updates the game field of `p` to properly reflect the game ID
specified by the string, `optarg`. */
static void parse_game_id(const char *optarg, struct params *p) {
if (!strcmp(optarg, "nekopara_volume_0"))
p->game = NEKOPARA_VOLUME_0;
else if (!strcmp(optarg, "nekopara_volume_0_steam"))
p->game = NEKOPARA_VOLUME_0_STEAM;
else if (!strcmp(optarg, "nekopara_volume_1"))
p->game = NEKOPARA_VOLUME_1;
else if (!strcmp(optarg, "nekopara_volume_1_steam"))
p->game = NEKOPARA_VOLUME_1_STEAM;
}
/* Returns a params structure parsed from `argv`. */
struct params parse_args(int argc, char **argv) {
/* getopt maintains external state which needs to be reset each time
`parse_args` is called, otherwise strange things will occur. */
optind = 1;
opterr = 1;
optopt = 63;
struct params p = {0};
if (argc < 2) {
p.mode = USAGE;
return p;
}
p.mode = EXTRACT;
int cur = 0, opt_index = 0, count = 0;
static struct option long_opts[] = {
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'V'},
{"verbose", no_argument, NULL, 'v'},
{"extract", no_argument, NULL, 'e'},
{"list", no_argument, NULL, 'l'},
{"output", no_argument, NULL, 'o'},
{"game", no_argument, NULL, 'g'},
{NULL, 0, NULL, 0}
};
do {
count++;
cur = getopt_long(argc, argv, "hVvelqo:g:", long_opts, &opt_index);
switch (cur) {
case 'h':
p.mode = HELP;
return p;
case 'V':
p.mode = VERSION;
return p;
case 'v':
p.verbose = true;
break;
case 'o':
count++;
parse_output_path(optarg, &p);
break;
case 'g':
count++;
parse_game_id(optarg, &p);
case 'e':
p.mode = EXTRACT;
break;
case 'l':
p.mode = LIST;
}
} while (cur >= 0);
if (count == argc) {
p.mode = USAGE;
return p;
}
p.vararg_index = count;
if (p.out == NULL) {
p.out_len = 2;
p.out = malloc(3);
strcpy(p.out, "./");
}
return p;
}
/* Frees allocated memory associated with `p`. */
void params_free(struct params p) {
free(p.out);
}
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