UTF16_IS_SURROGATE_SECOND  194 ext/mbstring/oniguruma/enc/utf16_be.c   if (UTF16_IS_SURROGATE_SECOND(*s) && s > start + 1)
UTF16_IS_SURROGATE_SECOND  195 ext/mbstring/oniguruma/enc/utf16_le.c   if (UTF16_IS_SURROGATE_SECOND(*(s+1)) && s > start + 1)