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Regex: Code cleanup and refactor for Saves handling

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This commit is contained in:
Maxime Coste 2017-10-04 19:49:16 +08:00
parent dbb175841b
commit 5f54e0de0e
1 changed files with 18 additions and 27 deletions
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45
src/regex_impl.hh
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@ -81,39 +81,32 @@ struct ThreadedRegexVM
{
int refcount;
Iterator pos[1];
static Saves* allocate(size_t count)
{
void* ptr = ::operator new (sizeof(Saves) + (count-1) * sizeof(Iterator));
Saves* saves = new (ptr) Saves{1, {}};
for (int i = 1; i < count; ++i)
new (&saves->pos[i]) Iterator{};
return saves;
}
static Saves* allocate(size_t count, const Iterator* pos)
{
void* ptr = ::operator new (sizeof(Saves) + (count-1) * sizeof(Iterator));
Saves* saves = new (ptr) Saves{1, pos[0]};
for (size_t i = 1; i < count; ++i)
new (&saves->pos[i]) Iterator{pos[i]};
return saves;
}
};
Saves* clone_saves(Iterator* pos)
template<bool copy>
Saves* new_saves(Iterator* pos)
{
kak_assert(not copy or pos != nullptr);
const auto count = m_program.save_count;
if (not m_free_saves.empty())
{
Saves* res = m_free_saves.back();
m_free_saves.pop_back();
res->refcount = 1;
std::copy(pos, pos + m_program.save_count, res->pos);
if (copy)
std::copy(pos, pos + count, res->pos);
else
std::fill(res->pos, res->pos + count, Iterator{});
return res;
}
m_saves.push_back(Saves::allocate(m_program.save_count, pos));
return m_saves.back();
void* ptr = ::operator new (sizeof(Saves) + (count-1) * sizeof(Iterator));
Saves* saves = new (ptr) Saves{1, copy ? pos[0] : Iterator{}};
for (size_t i = 1; i < count; ++i)
new (&saves->pos[i]) Iterator{copy ? pos[i] : Iterator{}};
m_saves.push_back(saves);
return saves;
}
void release_saves(Saves* saves)
@ -181,7 +174,7 @@ struct ThreadedRegexVM
if (thread.saves->refcount > 1)
{
--thread.saves->refcount;
thread.saves = clone_saves(thread.saves->pos);
thread.saves = new_saves<true>(thread.saves->pos);
}
const size_t index = *thread.inst++;
thread.saves->pos[index] = m_pos.base();
@ -325,10 +318,8 @@ struct ThreadedRegexVM
Vector<Thread> current_threads, next_threads;
const bool no_saves = (m_flags & RegexExecFlags::NoSaves);
Vector<Iterator> empty_saves(m_program.save_count, Iterator{});
Utf8It start{m_begin, m_begin, m_end};
if (exec_from(start, no_saves ? nullptr : clone_saves(empty_saves.data()),
if (exec_from(start, no_saves ? nullptr : new_saves<false>(nullptr),
current_threads, next_threads))
return true;
@ -337,7 +328,7 @@ struct ThreadedRegexVM
while (start != end)
{
if (exec_from(++start, no_saves ? nullptr : clone_saves(empty_saves.data()),
if (exec_from(++start, no_saves ? nullptr : new_saves<false>(nullptr),
current_threads, next_threads))
return true;
}