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Regex: tag instructions as scheduled as well instead of searching

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And a few more code cleanup in the ThreadedRegexVM
This commit is contained in:
Maxime Coste 2017-10-07 19:58:10 +08:00
parent 6bc5823745
commit f3736a4b48
2 changed files with 17 additions and 9 deletions
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2
src/regex_impl.cc
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@ -666,7 +666,7 @@ private:
uint32_t push_inst(CompiledRegex::Op op, uint32_t param = 0)
{
uint32_t res = m_program.instructions.size();
m_program.instructions.push_back({ op, false, param });
m_program.instructions.push_back({ op, false, false, param });
return res;
}

24
src/regex_impl.hh
View File

@ -49,6 +49,7 @@ struct CompiledRegex : RefCountable
{
Op op;
mutable bool processed;
mutable bool scheduled;
uint32_t param;
};
static_assert(sizeof(Instruction) == 8, "");
@ -225,15 +226,14 @@ private:
return StepResult::Failed;
inst.processed = true;
const Codepoint cp = pos == m_end ? 0 : *pos;
switch (inst.op)
{
case CompiledRegex::Literal:
if (inst.param == cp)
if (pos != m_end and inst.param == *pos)
return StepResult::Consumed;
return StepResult::Failed;
case CompiledRegex::LiteralIgnoreCase:
if (inst.param == to_lower(cp))
if (pos != m_end and inst.param == to_lower(*pos))
return StepResult::Consumed;
return StepResult::Failed;
case CompiledRegex::AnyChar:
@ -269,7 +269,9 @@ private:
break;
}
case CompiledRegex::Matcher:
return m_program.matchers[inst.param](cp) ?
if (pos == m_end)
return StepResult::Failed;
return m_program.matchers[inst.param](*pos) ?
StepResult::Consumed : StepResult::Failed;
case CompiledRegex::LineStart:
if (not is_line_start(pos))
@ -332,10 +334,13 @@ private:
next_threads.clear();
bool found_match = false;
while (true)
while (true) // Iterate on all codepoints and once at the end
{
for (auto& inst : m_program.instructions)
{
inst.processed = false;
inst.scheduled = false;
}
while (not current_threads.empty())
{
@ -363,10 +368,13 @@ private:
release_saves(thread.saves);
break;
case StepResult::Consumed:
if (contains_that(next_threads, [&](auto& t) { return t.inst == thread.inst; }))
if (m_program.instructions[thread.inst].scheduled)
{
release_saves(thread.saves);
else
next_threads.push_back(thread);
continue;
}
m_program.instructions[thread.inst].scheduled = true;
next_threads.push_back(thread);
break;
}
}