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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
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@ -14,6 +14,8 @@
namespace Kakoune namespace Kakoune
{ {
constexpr Codepoint CompiledRegex::StartChars::other;
struct ParsedRegex struct ParsedRegex
{ {
enum Op : char enum Op : char
@ -837,8 +839,6 @@ private:
return res; 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, // 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 // 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. // sequence would be still relevant for the parent node start chars computation.
@ -848,7 +848,7 @@ private:
switch (node->op) switch (node->op)
{ {
case ParsedRegex::Literal: case ParsedRegex::Literal:
if (node->value < start_chars_count) if (node->value < CompiledRegex::StartChars::count)
{ {
if (node->ignore_case) if (node->ignore_case)
{ {
@ -859,18 +859,18 @@ private:
start_chars.map[node->value] = true; start_chars.map[node->value] = true;
} }
else else
start_chars.accept_other = true; start_chars.map[CompiledRegex::StartChars::other] = true;
return node->quantifier.allows_none(); return node->quantifier.allows_none();
case ParsedRegex::AnyChar: case ParsedRegex::AnyChar:
for (auto& b : start_chars.map) for (auto& b : start_chars.map)
b = true; b = true;
start_chars.accept_other = true; start_chars.map[CompiledRegex::StartChars::other] = true;
return node->quantifier.allows_none(); return node->quantifier.allows_none();
case ParsedRegex::Matcher: 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)) if (m_program.matchers[node->value](c))
start_chars.map[c] = true; 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(); return node->quantifier.allows_none();
case ParsedRegex::Sequence: case ParsedRegex::Sequence:
{ {

8
src/regex_impl.hh
View File

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