RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 15:27:35 +00:00
Code Issues Activity Actions

LibRegex: Implement multiline stateful matches

Browse source
This commit is contained in:
Ali Mohammad Pur 2021-04-23 03:55:19 +04:30 • committed by Linus Groh
parent bb40d4d5ff
commit bf9c04a3da
2 changed files with 69 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

21
Userland/Libraries/LibRegex/RegexMatcher.cpp
View file

@ -82,9 +82,21 @@ RegexResult Matcher<Parser>::match(const Vector<RegexStringView> views, Optional
input.regex_options = m_regex_options | regex_options.value_or({}).value();
input.start_offset = m_pattern.start_offset;
output.operations = 0;
size_t lines_to_skip = 0;
if (input.regex_options.has_flag_set(AllFlags::Internal_Stateful))
VERIFY(views.size() == 1);
if (input.regex_options.has_flag_set(AllFlags::Internal_Stateful)) {
if (views.size() > 1 && input.start_offset > views.first().length()) {
dbgln("Started with start={}, goff={}, skip={}", input.start_offset, input.global_offset, lines_to_skip);
for (auto& view : views) {
if (input.start_offset < view.length() + 1)
break;
++lines_to_skip;
input.start_offset -= view.length() + 1;
input.global_offset += view.length() + 1;
}
dbgln("Ended with start={}, goff={}, skip={}", input.start_offset, input.global_offset, lines_to_skip);
}
}
if (c_match_preallocation_count) {
output.matches.ensure_capacity(c_match_preallocation_count);
@ -127,6 +139,11 @@ RegexResult Matcher<Parser>::match(const Vector<RegexStringView> views, Optional
continue_search = false;
for (auto& view : views) {
if (lines_to_skip != 0) {
++input.line;
--lines_to_skip;
continue;
}
input.view = view;
dbgln_if(REGEX_DEBUG, "[match] Starting match with view ({}): _{}_", view.length(), view);