unicode: Use a standard two-level mapping table for the mirror map.

dlls/dwrite/bidi.c

@@ -161,7 +161,8 @@ static void bidi_classify(const WCHAR *string, UINT8 *chartype, UINT32 count)
 WCHAR bidi_get_mirrored_char(WCHAR ch)
 {
     extern const WCHAR wine_mirror_map[] DECLSPEC_HIDDEN;
-    return ch + wine_mirror_map[wine_mirror_map[ch >> 8] + (ch & 0xff)];
+    WCHAR mirror = get_table_entry( wine_mirror_map, ch );
+    return mirror ? mirror : ch;
 }
 
 /* RESOLVE EXPLICIT */

dlls/usp10/usp10.c

@@ -937,7 +937,8 @@ static HRESULT init_script_cache(const HDC hdc, SCRIPT_CACHE *psc)
 static WCHAR mirror_char( WCHAR ch )
 {
     extern const WCHAR wine_mirror_map[] DECLSPEC_HIDDEN;
-    return ch + wine_mirror_map[wine_mirror_map[ch >> 8] + (ch & 0xff)];
+    WCHAR mirror = get_table_entry( wine_mirror_map, ch );
+    return mirror ? mirror : ch;
 }
 
 static DWORD decode_surrogate_pair(const WCHAR *str, unsigned int index, unsigned int end)

tools/make_unicode

@@ -1638,7 +1638,7 @@ sub dump_mirroring($)
     print OUTPUT "/* generated from $UNIDATA/BidiMirroring.txt */\n";
     print OUTPUT "/* DO NOT EDIT!! */\n\n";
     print OUTPUT "#include \"windef.h\"\n\n";
-    dump_case_table( "DECLSPEC_HIDDEN wine_mirror_map", @mirror_table );
+    dump_two_level_mapping( "wine_mirror_map", 0, @mirror_table );
     close OUTPUT;
     save_file($filename);
 }