+
+#else
+/* Override the system's mbrtowc() function. */
+
+# undef mbrtowc
+
+size_t
+rpl_mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
+{
+# if MBRTOWC_NULL_ARG_BUG || MBRTOWC_RETVAL_BUG
+ if (s == NULL)
+ {
+ pwc = NULL;
+ s = "";
+ n = 1;
+ }
+# endif
+
+# if MBRTOWC_RETVAL_BUG
+ {
+ static mbstate_t internal_state;
+
+ /* Override mbrtowc's internal state. We can not call mbsinit() on the
+ hidden internal state, but we can call it on our variable. */
+ if (ps == NULL)
+ ps = &internal_state;
+
+ if (!mbsinit (ps))
+ {
+ /* Parse the rest of the multibyte character byte for byte. */
+ size_t count = 0;
+ for (; n > 0; s++, n--)
+ {
+ wchar_t wc;
+ size_t ret = mbrtowc (&wc, s, 1, ps);
+
+ if (ret == (size_t)(-1))
+ return (size_t)(-1);
+ count++;
+ if (ret != (size_t)(-2))
+ {
+ /* The multibyte character has been completed. */
+ if (pwc != NULL)
+ *pwc = wc;
+ return (wc == 0 ? 0 : count);
+ }
+ }
+ return (size_t)(-2);
+ }
+ }
+# endif
+
+# if MBRTOWC_NUL_RETVAL_BUG
+ {
+ wchar_t wc;
+ size_t ret = mbrtowc (&wc, s, n, ps);
+
+ if (ret != (size_t)(-1) && ret != (size_t)(-2))
+ {
+ if (pwc != NULL)
+ *pwc = wc;
+ if (wc == 0)
+ ret = 0;
+ }
+ return ret;
+ }
+# else
+ return mbrtowc (pwc, s, n, ps);
+# endif
+}
+
+#endif