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134 lines
3.4 KiB
134 lines
3.4 KiB
#define _GNU_SOURCE
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#include <stddef.h>
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#include <getopt.h>
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#include <stdio.h>
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#include <string.h>
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extern int __optpos, __optreset;
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static void permute(char *const *argv, int dest, int src)
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{
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char **av = (char **)argv;
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char *tmp = av[src];
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int i;
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for (i=src; i>dest; i--)
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av[i] = av[i-1];
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av[dest] = tmp;
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}
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void __getopt_msg(const char *, const char *, const char *, size_t);
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static int __getopt_long_core(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx, int longonly);
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static int __getopt_long(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx, int longonly)
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{
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int ret, skipped, resumed;
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const char *optstring2 = optstring + 1;
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if (!optind || __optreset) {
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__optreset = 0;
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__optpos = 0;
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optind = 1;
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}
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if (optind >= argc || !argv[optind]) return -1;
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skipped = optind;
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if (optstring[0] != '+' && optstring[0] != '-') {
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int i;
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for (i=optind; ; i++) {
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if (i >= argc || !argv[i]) return -1;
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if (argv[i][0] == '-' && argv[i][1]) break;
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}
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optind = i;
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optstring2 = optstring;
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}
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resumed = optind;
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ret = __getopt_long_core(argc, argv, optstring2, longopts, idx, longonly);
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if (resumed > skipped) {
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int i, cnt = optind-resumed;
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for (i=0; i<cnt; i++)
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permute(argv, skipped, optind-1);
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optind = skipped + cnt;
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}
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return ret;
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}
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static int __getopt_long_core(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx, int longonly)
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{
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if (longopts && argv[optind][0] == '-' &&
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((longonly && argv[optind][1]) ||
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(argv[optind][1] == '-' && argv[optind][2])))
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{
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int i, cnt, match;
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char *opt;
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for (cnt=i=0; longopts[i].name; i++) {
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const char *name = longopts[i].name;
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opt = argv[optind]+1;
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if (*opt == '-') opt++;
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for (; *name && *name == *opt; name++, opt++);
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if (*opt && *opt != '=') continue;
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match = i;
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if (!*name) {
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cnt = 1;
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break;
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}
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cnt++;
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}
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if (cnt==1) {
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i = match;
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optind++;
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optopt = longopts[i].val;
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if (*opt == '=') {
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if (!longopts[i].has_arg) {
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if (optstring[0] == ':' || !opterr)
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return '?';
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__getopt_msg(argv[0],
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": option does not take an argument: ",
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longopts[i].name,
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strlen(longopts[i].name));
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return '?';
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}
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optarg = opt+1;
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} else {
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if (longopts[i].has_arg == required_argument) {
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if (!(optarg = argv[optind])) {
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if (optstring[0] == ':' || !opterr)
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return ':';
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__getopt_msg(argv[0],
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": option requires an argument: ",
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longopts[i].name,
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strlen(longopts[i].name));
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return '?';
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}
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optind++;
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} else optarg = NULL;
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}
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if (idx) *idx = i;
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if (longopts[i].flag) {
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*longopts[i].flag = longopts[i].val;
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return 0;
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}
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return longopts[i].val;
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}
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if (argv[optind][1] == '-') {
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if (optstring[0] != ':' && opterr)
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__getopt_msg(argv[0], cnt ?
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": option is ambiguous: " :
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": unrecognized option: ",
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argv[optind]+2,
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strlen(argv[optind]+2));
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optind++;
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return '?';
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}
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}
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return getopt(argc, argv, optstring);
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}
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int getopt_long(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx)
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{
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return __getopt_long(argc, argv, optstring, longopts, idx, 0);
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}
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int getopt_long_only(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx)
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{
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return __getopt_long(argc, argv, optstring, longopts, idx, 1);
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}
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