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-rw-r--r--src/misc/getopt.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/src/misc/getopt.c b/src/misc/getopt.c
new file mode 100644
index 00000000..abf0e847
--- /dev/null
+++ b/src/misc/getopt.c
@@ -0,0 +1,63 @@
+#include <unistd.h>
+#include <wchar.h>
+#include <string.h>
+#include <limits.h>
+#include <stdlib.h>
+
+char *optarg;
+int optind=1, opterr=1, optopt;
+static int optpos;
+
+int getopt(int argc, char * const argv[], const char *optstring)
+{
+ int i;
+ wchar_t c, d;
+ int k, l;
+ char *optchar;
+
+ if (optind >= argc || !argv[optind] || argv[optind][0] != '-' || !argv[optind][1])
+ return -1;
+ if (argv[optind][1] == '-' && !argv[optind][2])
+ return optind++, -1;
+
+ if (!optpos) optpos++;
+ if ((k = mbtowc(&c, argv[optind]+optpos, MB_LEN_MAX)) < 0) {
+ k = 1;
+ c = 0xfffd; /* replacement char */
+ }
+ optchar = argv[optind]+optpos;
+ optopt = c;
+ optpos += k;
+
+ if (!argv[optind][optpos]) {
+ optind++;
+ optpos = 0;
+ }
+
+ for (i=0; (l = mbtowc(&d, optstring+i, MB_LEN_MAX)) && d!=c; i+=l>0?l:1);
+
+ if (d != c) {
+ if (optstring[0] != ':' && opterr) {
+ write(2, argv[0], strlen(argv[0]));
+ write(2, ": illegal option: ", 18);
+ write(2, optchar, k);
+ write(2, "\n", 1);
+ }
+ return '?';
+ }
+ if (optstring[i+1] == ':') {
+ if (optind >= argc) {
+ if (optstring[0] == ':') return ':';
+ if (opterr) {
+ write(2, argv[0], strlen(argv[0]));
+ write(2, ": option requires an argument: ", 31);
+ write(2, optchar, k);
+ write(2, "\n", 1);
+ }
+ return '?';
+ }
+ optarg = argv[optind++] + optpos;
+ optpos = 0;
+ }
+ return c;
+}