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Unroll loop for ASCII check

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This commit is contained in:
Anatol Belski 2017-11-15 16:00:15 +01:00
parent c6d0c8aa3b
commit 178add7a58
1 changed files with 28 additions and 4 deletions
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32
win32/codepage.c
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@ -97,6 +97,7 @@ PW32CP wchar_t *php_win32_cp_conv_ascii_to_w(const char* in, size_t in_len, size
{/*{{{*/
wchar_t *ret = NULL;
const char *idx = in, *end;
BOOL failed = FALSE;
assert(in && in_len ? in[in_len] == '\0' : 1);
@ -114,14 +115,37 @@ PW32CP wchar_t *php_win32_cp_conv_ascii_to_w(const char* in, size_t in_len, size
end = in + in_len;
while (idx != end) {
if (!__isascii(*idx) && '\0' != *idx) {
while (end - idx > 8) {
char ch0 = *idx;
char ch1 = *(idx + 1);
char ch2 = *(idx + 2);
char ch3 = *(idx + 3);
char ch4 = *(idx + 4);
char ch5 = *(idx + 5);
char ch6 = *(idx + 6);
char ch7 = *(idx + 7);
if (!__isascii(ch0) || !__isascii(ch1) || !__isascii(ch2) || !__isascii(ch3) ||
!__isascii(ch4) || !__isascii(ch5) || !__isascii(ch6) || !__isascii(ch7)) {
failed = TRUE;
break;
}
idx++;
idx += 8;
}
if (idx == end) {
/* Finish the job on remaining chars. */
if (!failed) {
while (idx != end) {
if (!__isascii(*idx) && '\0' != *idx) {
failed = TRUE;
break;
}
idx++;
}
}
if (!failed) {
size_t i = 0;
int k = 0;
wchar_t *ret_idx;