- /* TODO: \uXXXX not supported yet */
- free(lex->value.string);
- lex->value.string = NULL;
- goto out;
- } else {
+ char buffer[4];
+ int length;
+ int32_t value;
+
+ value = decode_unicode_escape(p);
+ p += 5;
+
+ if(0xD800 <= value && value <= 0xDBFF) {
+ /* surrogate pair */
+ if(*p == '\\' && *(p + 1) == 'u') {
+ int32_t value2 = decode_unicode_escape(++p);
+ p += 5;
+
+ if(0xDC00 <= value2 && value2 <= 0xDFFF) {
+ /* valid second surrogate */
+ value =
+ ((value - 0xD800) << 10) +
+ (value2 - 0xDC00) +
+ 0x10000;
+ }
+ else {
+ /* invalid second surrogate */
+ error_set(error, lex,
+ "invalid Unicode '\\u%04X\\u%04X'",
+ value, value2);
+ goto out;
+ }
+ }
+ else {
+ /* no second surrogate */
+ error_set(error, lex, "invalid Unicode '\\u%04X'",
+ value);
+ goto out;
+ }
+ }
+ else if(0xDC00 <= value && value <= 0xDFFF) {
+ error_set(error, lex, "invalid Unicode '\\u%04X'", value);
+ goto out;
+ }
+ else if(value == 0)
+ {
+ error_set(error, lex, "\\u0000 is not allowed");
+ goto out;
+ }
+
+ if(utf8_encode(value, buffer, &length))
+ assert(0);
+
+ memcpy(t, buffer, length);
+ t += length;
+ }
+ else {