[444] | 1 | #define _GNU_SOURCE
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| 2 | #include <stddef.h>
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| 3 | #include <getopt.h>
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| 4 | #include <stdio.h>
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| 5 | #include <string.h>
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| 6 |
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| 7 | extern int __optpos, __optreset;
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| 8 |
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| 9 | static void permute(char *const *argv, int dest, int src)
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| 10 | {
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| 11 | char **av = (char **)argv;
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| 12 | char *tmp = av[src];
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| 13 | int i;
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| 14 | for (i=src; i>dest; i--)
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| 15 | av[i] = av[i-1];
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| 16 | av[dest] = tmp;
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| 17 | }
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| 18 |
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| 19 | void __getopt_msg(const char *, const char *, const char *, size_t);
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| 20 |
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| 21 | 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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| 22 |
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| 23 | static int __getopt_long(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx, int longonly)
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| 24 | {
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| 25 | int ret, skipped, resumed;
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| 26 | if (!optind || __optreset) {
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| 27 | __optreset = 0;
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| 28 | __optpos = 0;
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| 29 | optind = 1;
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| 30 | }
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| 31 | if (optind >= argc || !argv[optind]) return -1;
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| 32 | skipped = optind;
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| 33 | if (optstring[0] != '+' && optstring[0] != '-') {
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| 34 | int i;
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| 35 | for (i=optind; ; i++) {
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| 36 | if (i >= argc || !argv[i]) return -1;
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| 37 | if (argv[i][0] == '-' && argv[i][1]) break;
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| 38 | }
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| 39 | optind = i;
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| 40 | }
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| 41 | resumed = optind;
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| 42 | ret = __getopt_long_core(argc, argv, optstring, longopts, idx, longonly);
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| 43 | if (resumed > skipped) {
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| 44 | int i, cnt = optind-resumed;
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| 45 | for (i=0; i<cnt; i++)
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| 46 | permute(argv, skipped, optind-1);
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| 47 | optind = skipped + cnt;
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| 48 | }
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| 49 | return ret;
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| 50 | }
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| 51 |
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| 52 | 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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| 53 | {
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| 54 | optarg = 0;
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| 55 | if (longopts && argv[optind][0] == '-' &&
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| 56 | ((longonly && argv[optind][1] && argv[optind][1] != '-') ||
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| 57 | (argv[optind][1] == '-' && argv[optind][2])))
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| 58 | {
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| 59 | int colon = optstring[optstring[0]=='+'||optstring[0]=='-']==':';
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| 60 | int i, cnt, match;
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| 61 | char *opt;
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| 62 | for (cnt=i=0; longopts[i].name; i++) {
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| 63 | const char *name = longopts[i].name;
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| 64 | opt = argv[optind]+1;
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| 65 | if (*opt == '-') opt++;
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| 66 | for (; *name && *name == *opt; name++, opt++);
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| 67 | if (*opt && *opt != '=') continue;
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| 68 | match = i;
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| 69 | if (!*name) {
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| 70 | cnt = 1;
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| 71 | break;
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| 72 | }
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| 73 | cnt++;
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| 74 | }
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| 75 | if (cnt==1) {
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| 76 | i = match;
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| 77 | optind++;
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| 78 | if (*opt == '=') {
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| 79 | if (!longopts[i].has_arg) {
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| 80 | optopt = longopts[i].val;
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| 81 | if (colon || !opterr)
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| 82 | return '?';
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| 83 | __getopt_msg(argv[0],
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| 84 | ": option does not take an argument: ",
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| 85 | longopts[i].name,
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| 86 | strlen(longopts[i].name));
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| 87 | return '?';
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| 88 | }
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| 89 | optarg = opt+1;
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| 90 | } else if (longopts[i].has_arg == required_argument) {
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| 91 | if (!(optarg = argv[optind])) {
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| 92 | optopt = longopts[i].val;
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| 93 | if (colon) return ':';
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| 94 | if (!opterr) return '?';
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| 95 | __getopt_msg(argv[0],
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| 96 | ": option requires an argument: ",
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| 97 | longopts[i].name,
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| 98 | strlen(longopts[i].name));
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| 99 | return '?';
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| 100 | }
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| 101 | optind++;
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| 102 | }
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| 103 | if (idx) *idx = i;
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| 104 | if (longopts[i].flag) {
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| 105 | *longopts[i].flag = longopts[i].val;
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| 106 | return 0;
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| 107 | }
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| 108 | return longopts[i].val;
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| 109 | }
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| 110 | if (argv[optind][1] == '-') {
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| 111 | optopt = 0;
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| 112 | if (!colon && opterr)
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| 113 | __getopt_msg(argv[0], cnt ?
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| 114 | ": option is ambiguous: " :
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| 115 | ": unrecognized option: ",
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| 116 | argv[optind]+2,
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| 117 | strlen(argv[optind]+2));
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| 118 | optind++;
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| 119 | return '?';
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| 120 | }
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| 121 | }
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| 122 | return getopt(argc, argv, optstring);
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| 123 | }
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| 124 |
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| 125 | int getopt_long(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx)
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| 126 | {
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| 127 | return __getopt_long(argc, argv, optstring, longopts, idx, 0);
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| 128 | }
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| 129 |
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| 130 | int getopt_long_only(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx)
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| 131 | {
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| 132 | return __getopt_long(argc, argv, optstring, longopts, idx, 1);
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| 133 | }
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