+
+/*******************************************************************
+ Determine if a character is valid in a 8.3 name.
+********************************************************************/
+
+/**
+ * Load the valid character map table from <tt>valid.dat</tt> or
+ * create from the configured codepage.
+ *
+ * This function is called whenever the configuration is reloaded.
+ * However, the valid character table is not changed if it's loaded
+ * from a file, because we can't unmap files.
+ **/
+
+static uint8 *valid_table;
+static void init_valid_table(void)
+{
+ if (valid_table) {
+ return;
+ }
+
+ valid_table = (uint8 *)map_file(data_path("valid.dat"), 0x10000);
+ if (!valid_table) {
+ smb_panic("Could not load valid.dat file required for mangle method=hash");
+ return;
+ }
+}
+
+static bool isvalid83_w(smb_ucs2_t c)
+{
+ init_valid_table();
+ return valid_table[SVAL(&c,0)] != 0;
+}
+