Import from old repository commit 61ef2b42a9c4ba8e1600f15bb0236765edc2ad45.

lib/command-line.c

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2008 Nicira Networks.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <config.h>
+#include "command-line.h"
+#include <getopt.h>
+#include <limits.h>
+#include "util.h"
+#include "vlog.h"
+
+/* Given the GNU-style long options in 'options', returns a string that may be
+ * passed to getopt() with the corresponding short options.  The caller is
+ * responsible for freeing the string. */
+char *
+long_options_to_short_options(const struct option options[])
+{
+    char short_options[UCHAR_MAX * 3 + 1];
+    char *p = short_options;
+    
+    for (; options->name; options++) {
+        const struct option *o = options;
+        if (o->flag == NULL && o->val > 0 && o->val <= UCHAR_MAX) {
+            *p++ = o->val;
+            if (o->has_arg == required_argument) {
+                *p++ = ':';
+            } else if (o->has_arg == optional_argument) {
+                *p++ = ':';
+                *p++ = ':';
+            }
+        }
+    }
+    *p = '\0';
+    
+    return xstrdup(short_options);
+}
+