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Regex: put the other char boolean inside the general start char map

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This commit is contained in:
Maxime Coste 2017-10-21 10:04:08 +08:00
parent 7c3bc48627
commit 9e15207d2a
2 changed files with 11 additions and 11 deletions
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14
src/regex_impl.cc
View File

@ -14,6 +14,8 @@
namespace Kakoune
{
constexpr Codepoint CompiledRegex::StartChars::other;
struct ParsedRegex
{
enum Op : char
@ -837,8 +839,6 @@ private:
return res;
}
static constexpr size_t start_chars_count = CompiledRegex::StartChars::count;
// Fills accepted and rejected according to which chars can start the given node,
// returns true if the node did not consume the char, hence a following node in
// sequence would be still relevant for the parent node start chars computation.
@ -848,7 +848,7 @@ private:
switch (node->op)
{
case ParsedRegex::Literal:
if (node->value < start_chars_count)
if (node->value < CompiledRegex::StartChars::count)
{
if (node->ignore_case)
{
@ -859,18 +859,18 @@ private:
start_chars.map[node->value] = true;
}
else
start_chars.accept_other = true;
start_chars.map[CompiledRegex::StartChars::other] = true;
return node->quantifier.allows_none();
case ParsedRegex::AnyChar:
for (auto& b : start_chars.map)
b = true;
start_chars.accept_other = true;
start_chars.map[CompiledRegex::StartChars::other] = true;
return node->quantifier.allows_none();
case ParsedRegex::Matcher:
for (Codepoint c = 0; c < start_chars_count; ++c)
for (Codepoint c = 0; c < CompiledRegex::StartChars::count; ++c)
if (m_program.matchers[node->value](c))
start_chars.map[c] = true;
start_chars.accept_other = true; // stay safe
start_chars.map[CompiledRegex::StartChars::other] = true; // stay safe
return node->quantifier.allows_none();
case ParsedRegex::Sequence:
{

8
src/regex_impl.hh
View File

@ -76,9 +76,10 @@ struct CompiledRegex : RefCountable, UseMemoryDomain<MemoryDomain::Regex>
struct StartChars
{
static constexpr size_t count = 256;
bool accept_other;
bool map[count];
static constexpr Codepoint other = 256;
bool map[count+1];
};
std::unique_ptr<StartChars> start_chars;
};
@ -437,8 +438,7 @@ private:
return;
while (start != end and *start >= 0 and
((*start < 256 and not start_chars->map[*start]) or
(*start >= 256 and not start_chars->accept_other)))
not start_chars->map[std::min(*start, CompiledRegex::StartChars::other)])
++start;
}