+ return 0;
+}
+
+/* Simple failure callback that displays an error and exits. */
+static long
+exit_failure_callback (unsigned int code, const char *msg, void *callback_arg)
+{
+ if (msg == NULL)
+ error (1, 0, _("cannot convert U+%04X to local character set"), code);
+ else
+ error (1, 0, _("cannot convert U+%04X to local character set: %s"), code,
+ gettext (msg));
+ return -1;
+}
+
+/* Simple failure callback that displays a fallback representation in plain
+ ASCII, using the same notation as ISO C99 strings. */
+static long
+fallback_failure_callback (unsigned int code, const char *msg, void *callback_arg)
+{
+ FILE *stream = (FILE *) callback_arg;
+
+ if (code < 0x10000)
+ fprintf (stream, "\\u%04X", code);
+ else
+ fprintf (stream, "\\U%08X", code);
+ return -1;