/*-
 * Copyright (c) 2026, Mr. Goblin
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following
 * disclaimer in the documentation and/or other materials provided
 * with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 */

#include <stdlib.h>
#include <string.h>

#include "cliflags.h"

/* -f */
struct bool_flag_val
extract_bool_flag(char flagletter, int argc, char **argv)
{
	struct bool_flag_val res = {0};
	char flagstr[3] = { '-', ' ', '\0' };
	int i;
	flagstr[1] = flagletter;
	res.code = fvr_not_found;
	res.data = 0;
	for (i = 1; i < argc; i++) {
		if (0 == strcmp(flagstr, argv[i])) {
			res.code = fvr_ok;
			res.data = 1;
			break;
		}
	}
	return res;
}

/* -f the_str */
struct str_flag_val
extract_str_flag(char flagletter, int argc, char **argv)
{
	struct str_flag_val res = {0};
	char flagstr[3] = { '-', ' ', '\0' };
	int i;
	flagstr[1] = flagletter;
	for (i = 1; i < argc; i++)
		if (0 == strcmp(flagstr, argv[i]))
			break;
	if (argc <= i) {
		res.code = fvr_not_found;
	} else if (argc-1 == i) {
		res.code = fvr_invalid;
	} else {
		res.code = fvr_ok;
		res.data = argv[i+1];
	}
	return res;
}

/* -f number */
struct int_flag_val
extract_int_flag(char flagletter, int argc, char **argv)
{
	struct int_flag_val res;
	struct str_flag_val strres =
		extract_str_flag(flagletter, argc, argv);
	char *endptr;
	res.code = strres.code;
	if (fvr_ok != res.code) {
		return res;
	}
	res.data = strtol(strres.data, &endptr, 10);
	if ('\0' != *endptr)
		res.code = fvr_invalid;
	return res;
}