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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* getopt_long.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "config.h"
#include "compat.h"
#ifdef HAVE_GETOPT
#include <unistd.h>
#endif
#include <stdio.h>
#include <string.h>
#ifndef HAVE_GETOPT_LONG
int getopt_long(int argc, char *const argv[], const char *optstr,
const struct option *longopts, int *longindex)
{
size_t i, len;
char *ptr;
(void)longindex;
if (optind >= argc || argv[optind][0] != '-' ||
argv[optind][1] != '-' || argv[optind][2] == '\0')
return getopt(argc, argv, optstr);
optarg = NULL;
ptr = argv[optind] + 2;
for (len = 0; ptr[len] != '\0' && ptr[len] != '='; ++len)
;
for (i = 0; longopts[i].name != NULL; ++i) {
if (strncmp(longopts[i].name, ptr, len) != 0)
continue;
if (longopts[i].name[len] == '\0')
break;
}
if (longopts[i].name == NULL)
goto fail_unknown;
if (ptr[len] == '=') {
if (!longopts[i].has_arg)
goto fail_arg;
optarg = ptr + len + 1;
} else if (longopts[i].has_arg) {
if (++optind >= argc)
goto fail_no_arg;
optarg = argv[optind];
}
++optind;
return longopts[i].val;
fail_unknown:
fprintf(stderr, "%s: unknown option `--%s`\n", argv[0], ptr);
return '?';
fail_arg:
fprintf(stderr, "%s: no argument expected for option `--%s`\n",
argv[0], ptr);
return '?';
fail_no_arg:
fprintf(stderr, "%s: missing argument for option `--%s`\n",
argv[0], ptr);
return '?';
}
#endif
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