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/*
* Small reimplementation of getopt().
*
* Copyright 2012 Andrew Wood, distributed under the Artistic License 2.0.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifndef HAVE_GETOPT
char *minioptarg = NULL;
int minioptind = 0;
int miniopterr = 1;
int minioptopt = 0;
/*
* Minimalist getopt() clone, which handles short options only and doesn't
* permute argv[].
*/
int minigetopt(int argc, char **argv, char *optstring)
{
static int nextchar = 0;
int optchar;
int i;
if ((minioptind == 0) && (argc > 0))
minioptind++;
if ((nextchar > 0) && (argv[minioptind][nextchar] == 0)) {
minioptind++;
nextchar = 0;
}
if (minioptind >= argc)
return -1;
/*
* End of options if arg doesn't start with "-"
*/
if (argv[minioptind][0] != '-')
return -1;
/*
* End of options if arg is just "-"
*/
if (argv[minioptind][1] == 0)
return -1;
/*
* End of options if arg is "--", but don't include the "--" in the
* non-option arguments
*/
if ((argv[minioptind][1] == '-') && (argv[minioptind][2] == 0)) {
minioptind++;
return -1;
}
if (nextchar == 0)
nextchar = 1;
optchar = argv[minioptind][nextchar++];
for (i = 0; optstring[i] != 0 && optstring[i] != optchar; i++) {
}
if (optstring[i] == 0) {
minioptopt = optchar;
if (miniopterr)
fprintf(stderr, "%s: invalid option -- %c\n",
argv[0], optchar);
return '?';
}
if (optstring[i + 1] != ':') {
minioptarg = NULL;
return optchar;
}
/*
* At this point we've got an option that takes an argument.
*/
/*
* Next character isn't 0, so the argument is within this array
* element (i.e. "-dFOO").
*/
if (argv[minioptind][nextchar] != 0) {
minioptarg = &(argv[minioptind][nextchar]);
nextchar = 0;
minioptind++;
return optchar;
}
/*
* Argument is in the next array element (i.e. "-d FOO").
*/
nextchar = 0;
minioptind++;
if (minioptind >= argc) {
fprintf(stderr, "%s: option `-%c' requires an argument\n",
argv[0], optchar);
return ':';
}
minioptarg = argv[minioptind++];
return optchar;
}
#endif /* HAVE_GETOPT */
/* EOF */
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