uhub/src/util/getopt.c

61 lines
1.2 KiB
C

/*
* uhub - A tiny ADC p2p connection hub
* Copyright (C) 2007-2014, Jan Vidar Krey
*
* 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 3 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, see <https://www.gnu.org/licenses/>.
*
*/
#include "uhub.h"
#ifdef NEED_GETOPT
char *optarg = NULL;
int optind = 1;
/*
* This is a very simple subset of the real getopt().
*/
int getopt(int argc, char* const argv[], const char *optstring)
{
int ret;
char* pos;
char* arg = argv[optind++];
optarg = NULL;
if (optind > argc)
return -1;
if (*arg != '-')
return -1;
arg++;
if (*arg == '-')
arg++;
ret = *arg;
pos = strchr(optstring, ret);
if (!pos)
return ret;
if (*(pos+1) == ':')
optarg = argv[optind++];
return ret;
}
#endif