cleanup src/linux and src/misc trees, etc.

[musl] / src / misc / getopt_long.c

diff --git a/src/misc/getopt_long.c b/src/misc/getopt_long.c
new file mode 100644 (file)
index 0000000..6d3a4a6
--- /dev/null
+++ b/src/misc/getopt_long.c
@@ -0,0 +1,52 @@
+#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);
+}