summaryrefslogtreecommitdiff
path: root/libc/unistd/getopt_long-susv3.c
diff options
context:
space:
mode:
authorPeter S. Mazinger <ps.m@gmx.net>2006-02-27 15:09:48 +0000
committerPeter S. Mazinger <ps.m@gmx.net>2006-02-27 15:09:48 +0000
commit0e4c4d11086a2f00998b0426bffd25a6b1495101 (patch)
tree1b2a42bc68f12c698ba2403a99e4e2ad1d942fed /libc/unistd/getopt_long-susv3.c
parentcc7fbc32612c169253c073f2ad617a358862e502 (diff)
Add Rich Felker's getopt_long to be used in conjunction w/ the SuSv3 getopt
Diffstat (limited to 'libc/unistd/getopt_long-susv3.c')
-rw-r--r--libc/unistd/getopt_long-susv3.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/libc/unistd/getopt_long-susv3.c b/libc/unistd/getopt_long-susv3.c
new file mode 100644
index 000000000..9bae3d845
--- /dev/null
+++ b/libc/unistd/getopt_long-susv3.c
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2006 Rich Felker <dalias@aerifal.cx>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <stddef.h>
+#include <getopt.h>
+#include <stdio.h>
+
+libc_hidden_proto(getopt)
+
+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;
+ char *opt = argv[optind]+2;
+ for (i=0; longopts[i].name; i++) {
+ const char *name = longopts[i].name;
+ while (*name && *name++ == *opt++);
+ if (*name && *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);
+}