67 lines
1.4 KiB
C
67 lines
1.4 KiB
C
/* Public domain. */
|
|
|
|
#define SUBGETOPTNOSHORT
|
|
#include "subgetopt.h"
|
|
|
|
#define sgopt subgetopt
|
|
#define optind subgetoptind
|
|
#define optpos subgetoptpos
|
|
#define optarg subgetoptarg
|
|
#define optproblem subgetoptproblem
|
|
#define optdone subgetoptdone
|
|
|
|
int optind = 1;
|
|
int optpos = 0;
|
|
const char *optarg = 0;
|
|
int optproblem = 0;
|
|
int optdone = SUBGETOPTDONE;
|
|
|
|
int sgopt(int argc,const char *const *argv,const char *opts)
|
|
{
|
|
int c;
|
|
const char *s;
|
|
|
|
optarg = 0;
|
|
if (!argv || (optind >= argc) || !argv[optind]) return optdone;
|
|
if (optpos && !argv[optind][optpos]) {
|
|
++optind;
|
|
optpos = 0;
|
|
if ((optind >= argc) || !argv[optind]) return optdone;
|
|
}
|
|
if (!optpos) {
|
|
if (argv[optind][0] != '-') return optdone;
|
|
++optpos;
|
|
c = argv[optind][1];
|
|
if ((c == '-') || (c == 0)) {
|
|
if (c) ++optind;
|
|
optpos = 0;
|
|
return optdone;
|
|
}
|
|
/* otherwise c is reassigned below */
|
|
}
|
|
c = argv[optind][optpos];
|
|
++optpos;
|
|
s = opts;
|
|
while (*s) {
|
|
if (c == *s) {
|
|
if (s[1] == ':') {
|
|
optarg = argv[optind] + optpos;
|
|
++optind;
|
|
optpos = 0;
|
|
if (!*optarg) {
|
|
optarg = argv[optind];
|
|
if ((optind >= argc) || !optarg) { /* argument past end */
|
|
optproblem = c;
|
|
return '?';
|
|
}
|
|
++optind;
|
|
}
|
|
}
|
|
return c;
|
|
}
|
|
++s;
|
|
if (*s == ':') ++s;
|
|
}
|
|
optproblem = c;
|
|
return '?';
|
|
}
|