- size_t len = strlen (dirname) + 1;
- new_dirname = (char *) malloc (len);
- if (new_dirname == NULL)
- return NULL;
+ const char *dirname = *dirnamep;
+
+ if (dirname == NULL)
+ /* The current binding has be to returned. */
+ *dirnamep = binding->dirname;
+ else
+ {
+ /* The domain is already bound. If the new value and the old
+ one are equal we simply do nothing. Otherwise replace the
+ old binding. */
+ char *result = binding->dirname;
+ if (strcmp (dirname, result) != 0)
+ {
+ if (strcmp (dirname, INTUSE(_nl_default_dirname)) == 0)
+ result = (char *) INTUSE(_nl_default_dirname);
+ else
+ {
+#if defined _LIBC || defined HAVE_STRDUP
+ result = strdup (dirname);
+#else
+ size_t len = strlen (dirname) + 1;
+ result = (char *) malloc (len);
+ if (__builtin_expect (result != NULL, 1))
+ memcpy (result, dirname, len);
+#endif
+ }