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Implement conditional casing for Greek letter sigma when title-casing text

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This commit is contained in:
Alex Dowad 2023-01-09 13:21:31 +02:00
parent 290efe842d
commit a90358639d
3 changed files with 68 additions and 2 deletions
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24
ext/mbstring/php_unicode.c
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@ -427,12 +427,34 @@ MBSTRING_API zend_string *php_unicode_convert_case(php_case_mode case_mode, cons
*p++ = w;
continue;
}
uint32_t w2 = title_mode ? php_unicode_tolower_raw(w, src_encoding) : php_unicode_totitle_raw(w, src_encoding);
uint32_t w2;
if (title_mode) {
if (w == 0x3A3) {
int j = i - 1;
while (j >= 0 && php_unicode_is_case_ignorable(wchar_buf[j])) {
j--;
}
if (j >= 0 ? php_unicode_is_cased(wchar_buf[j]) : scan_back_for_cased_letter(p, converted_end)) {
j = i + 1;
while (j < out_len && php_unicode_is_case_ignorable(wchar_buf[j])) {
j++;
}
if (j >= out_len ? !scan_ahead_for_cased_letter(in, in_len, state, src_encoding) : !php_unicode_is_cased(wchar_buf[j])) {
*p++ = 0x3C2;
goto set_title_mode;
}
}
}
w2 = php_unicode_tolower_raw(w, src_encoding);
} else {
w2 = php_unicode_totitle_raw(w, src_encoding);
}
if (UNEXPECTED(w2 > 0xFFFFFF)) {
p = emit_special_casing_sequence(w2, p);
} else {
*p++ = w2;
}
set_title_mode:
if (!php_unicode_is_case_ignorable(w)) {
title_mode = php_unicode_is_cased(w);
}