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Optimize mbstring upper/lowercasing: use fast path in more cases

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The 'fast path' in the uppercase/lowercase functions for Unicode text can be used
for a slightly greater range of characters. This is not expected to have a big
impact on performance, since the number of characters which will use the 'fast path'
is only increased by about 50-60, and these are not very commonly used characters...
but still, it doesn't cost anything.
This commit is contained in:
Alex Dowad
2020-07-26 21:17:27 +02:00
parent 36c979e2b6
commit 4e51810f9b
1 changed files with 6 additions and 2 deletions
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8
ext/mbstring/php_unicode.c
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@@ -121,7 +121,9 @@ static inline unsigned mph_lookup(
static unsigned php_unicode_toupper_raw(unsigned code, enum mbfl_no_encoding enc)
{
if (code < 0x80) {
/* After the ASCII characters, the first codepoint with an uppercase version
* is 0xB5 (MICRO SIGN) */
if (code < 0xB5) {
/* Fast path for ASCII */
if (code >= 0x61 && code <= 0x7A) {
if (UNEXPECTED(enc == mbfl_no_encoding_8859_9 && code == 0x69)) {
@@ -141,7 +143,9 @@ static unsigned php_unicode_toupper_raw(unsigned code, enum mbfl_no_encoding enc
static unsigned php_unicode_tolower_raw(unsigned code, enum mbfl_no_encoding enc)
{
if (code < 0x80) {
/* After the ASCII characters, the first codepoint with a lowercase version
* is 0xC0 (LATIN CAPITAL LETTER A WITH GRAVE) */
if (code < 0xC0) {
/* Fast path for ASCII */
if (code >= 0x41 && code <= 0x5A) {
if (UNEXPECTED(enc == mbfl_no_encoding_8859_9 && code == 0x0049L)) {