| #define _GNU_SOURCE |
| #include <stddef.h> |
| #include <getopt.h> |
| #include <stdio.h> |
| |
| static int __getopt_long(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx, int longonly) |
| { |
| if (optind >= argc || !argv[optind] || argv[optind][0] != '-') return -1; |
| if ((longonly && argv[optind][1]) || |
| (argv[optind][1] == '-' && argv[optind][2])) |
| { |
| int i; |
| for (i=0; longopts[i].name; i++) { |
| const char *name = longopts[i].name; |
| char *opt = argv[optind]+1; |
| if (*opt == '-') opt++; |
| for (; *name && *name == *opt; name++, opt++); |
| if (*name || (*opt && *opt != '=')) continue; |
| if (*opt == '=') { |
| if (!longopts[i].has_arg) continue; |
| optarg = opt+1; |
| } else { |
| if (longopts[i].has_arg == required_argument) { |
| if (!(optarg = argv[++optind])) |
| return ':'; |
| } else optarg = NULL; |
| } |
| optind++; |
| if (idx) *idx = i; |
| if (longopts[i].flag) { |
| *longopts[i].flag = longopts[i].val; |
| return 0; |
| } |
| return longopts[i].val; |
| } |
| if (argv[optind][1] == '-') { |
| optind++; |
| return '?'; |
| } |
| } |
| return getopt(argc, argv, optstring); |
| } |
| |
| int getopt_long(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx) |
| { |
| return __getopt_long(argc, argv, optstring, longopts, idx, 0); |
| } |
| |
| int getopt_long_only(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx) |
| { |
| return __getopt_long(argc, argv, optstring, longopts, idx, 1); |
| } |