RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-31 11:18:11 +00:00
Code Issues Activity Actions

LibRegex: Support non-ASCII case-insensitive character comparisons

Browse source 
Specifically, when the Unicode flag is set, use Unicode-aware case
folding to case-insensitively compare code points.
This commit is contained in:
Timothy Flynn 2023-11-08 10:30:55 -05:00 • committed by Tim Flynn
parent 3fbf33bd37
commit e122039c99
2 changed files with 23 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

15
Userland/Libraries/LibRegex/RegexByteCode.cpp
View file

@ -701,12 +701,19 @@ ALWAYS_INLINE void OpCode_Compare::compare_char(MatchInput const& input, MatchSt
return;
// FIXME: Figure out how to do this if unicode() without performing a substring split first.
auto input_view = input.view.unicode() ? input.view.substring_view(state.string_position, 1)[0] : input.view.code_unit_at(state.string_position_in_code_units);
auto input_view = input.view.unicode()
? input.view.substring_view(state.string_position, 1)[0]
: input.view.code_unit_at(state.string_position_in_code_units);
bool equal;
if (input.regex_options & AllFlags::Insensitive)
equal = to_ascii_lowercase(input_view) == to_ascii_lowercase(ch1); // FIXME: Implement case-insensitive matching for non-ascii characters
else
if (input.regex_options & AllFlags::Insensitive) {
if (input.view.unicode())
equal = Unicode::equals_ignoring_case(Utf32View { &input_view, 1 }, Utf32View { &ch1, 1 });
else
equal = to_ascii_lowercase(input_view) == to_ascii_lowercase(ch1);
} else {
equal = input_view == ch1;
}
if (equal) {
if (inverse)