1#define _GNU_SOURCE
2#include <stddef.h>
3#include <stdlib.h>
4#include <limits.h>
5#include <getopt.h>
6#include <stdio.h>
7#include <string.h>
8#include "stdio_impl.h"
9
10extern int __optpos, __optreset;
11
12static void permute(char *const *argv, int dest, int src)
13{
14 char **av = (char **)argv;
15 char *tmp = av[src];
16 int i;
17 for (i=src; i>dest; i--)
18 av[i] = av[i-1];
19 av[dest] = tmp;
20}
21
22static int __getopt_long_core(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx, int longonly);
23
24static int __getopt_long(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx, int longonly)
25{
26 int ret, skipped, resumed;
27 if (!optind || __optreset) {
28 __optreset = 0;
29 __optpos = 0;
30 optind = 1;
31 }
32 if (optind >= argc || !argv[optind]) return -1;
33 skipped = optind;
34 if (optstring[0] != '+' && optstring[0] != '-') {
35 int i;
36 for (i=optind; ; i++) {
37 if (i >= argc || !argv[i]) return -1;
38 if (argv[i][0] == '-' && argv[i][1]) break;
39 }
40 optind = i;
41 }
42 resumed = optind;
43 ret = __getopt_long_core(argc, argv, optstring, longopts, idx, longonly);
44 if (resumed > skipped) {
45 int i, cnt = optind-resumed;
46 for (i=0; i<cnt; i++)
47 permute(argv, skipped, optind-1);
48 optind = skipped + cnt;
49 }
50 return ret;
51}
52
53static int __getopt_long_core(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx, int longonly)
54{
55 optarg = 0;
56 if (longopts && argv[optind][0] == '-' &&
57 ((longonly && argv[optind][1] && argv[optind][1] != '-') ||
58 (argv[optind][1] == '-' && argv[optind][2])))
59 {
60 int colon = optstring[optstring[0]=='+'||optstring[0]=='-']==':';
61 int i, cnt, match;
62 char *arg, *opt, *start = argv[optind]+1;
63 for (cnt=i=0; longopts[i].name; i++) {
64 const char *name = longopts[i].name;
65 opt = start;
66 if (*opt == '-') opt++;
67 while (*opt && *opt != '=' && *opt == *name)
68 name++, opt++;
69 if (*opt && *opt != '=') continue;
70 arg = opt;
71 match = i;
72 if (!*name) {
73 cnt = 1;
74 break;
75 }
76 cnt++;
77 }
78 if (cnt==1 && longonly && arg-start == mblen(start, MB_LEN_MAX)) {
79 int l = arg-start;
80 for (i=0; optstring[i]; i++) {
81 int j;
82 for (j=0; j<l && start[j]==optstring[i+j]; j++);
83 if (j==l) {
84 cnt++;
85 break;
86 }
87 }
88 }
89 if (cnt==1) {
90 i = match;
91 opt = arg;
92 optind++;
93 if (*opt == '=') {
94 if (!longopts[i].has_arg) {
95 optopt = longopts[i].val;
96 if (colon || !opterr)
97 return '?';
98 __getopt_msg(argv[0],
99 ": option does not take an argument: ",
100 longopts[i].name,
101 strlen(longopts[i].name));
102 return '?';
103 }
104 optarg = opt+1;
105 } else if (longopts[i].has_arg == required_argument) {
106 if (!(optarg = argv[optind])) {
107 optopt = longopts[i].val;
108 if (colon) return ':';
109 if (!opterr) return '?';
110 __getopt_msg(argv[0],
111 ": option requires an argument: ",
112 longopts[i].name,
113 strlen(longopts[i].name));
114 return '?';
115 }
116 optind++;
117 }
118 if (idx) *idx = i;
119 if (longopts[i].flag) {
120 *longopts[i].flag = longopts[i].val;
121 return 0;
122 }
123 return longopts[i].val;
124 }
125 if (argv[optind][1] == '-') {
126 optopt = 0;
127 if (!colon && opterr)
128 __getopt_msg(argv[0], cnt ?
129 ": option is ambiguous: " :
130 ": unrecognized option: ",
131 argv[optind]+2,
132 strlen(argv[optind]+2));
133 optind++;
134 return '?';
135 }
136 }
137 return getopt(argc, argv, optstring);
138}
139
140int getopt_long(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx)
141{
142 return __getopt_long(argc, argv, optstring, longopts, idx, 0);
143}
144
145int getopt_long_only(int argc, char *const *argv, const char *optstring, const struct option *longopts, int *idx)
146{
147 return __getopt_long(argc, argv, optstring, longopts, idx, 1);
148}