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Use fast path in more cases when doing case folding with mb_convert_case #20889

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Use fast path in more cases when doing case folding with mb_convert_case #20889

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4 changes: 3 additions & 1 deletion ext/mbstring/php_unicode.c
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Original file line number Diff line number Diff line change
Expand Up @@ -180,7 +180,9 @@ static unsigned php_unicode_totitle_raw(unsigned code, const mbfl_encoding *enc)

static unsigned php_unicode_tofold_raw(unsigned code, const mbfl_encoding *enc)
{
if (code < 0x80) {
/* After the ASCII characters, the first codepoint with an special case-folded version
* is 0xB5 (MICRO SIGN) */
if (code < 0xB5) {
/* Fast path for ASCII */
if (code >= 0x41 && code <= 0x5A) {
if (UNEXPECTED(enc == &mbfl_encoding_8859_9 && code == 0x49)) {
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