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AK: Make CaseInsensitiveStringTraits allocation-free

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Instead of calling String::to_lowercase(), do case-insensitive hashing
and comparison.
This commit is contained in:
Andreas Kling 2022-02-18 22:56:53 +01:00
parent 1b6ed558bb
commit 2dd3b54827
Notes: sideshowbarker 2024-07-17 18:32:08 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/2dd3b54827
3 changed files with 9 additions and 2 deletions
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4
AK/String.h
View file

@ -305,8 +305,8 @@ struct Traits<String> : public GenericTraits<String> {
};
struct CaseInsensitiveStringTraits : public Traits<String> {
static unsigned hash(const String& s) { return s.impl() ? s.to_lowercase().impl()->hash() : 0; }
static bool equals(const String& a, const String& b) { return a.to_lowercase() == b.to_lowercase(); }
static unsigned hash(String const& s) { return s.impl() ? s.impl()->case_insensitive_hash() : 0; }
static bool equals(String const& a, String const& b) { return a.equals_ignoring_case(b); }
};
bool operator<(const char*, const String&);

5
AK/StringImpl.cpp
View file

@ -133,6 +133,11 @@ NonnullRefPtr<StringImpl> StringImpl::to_uppercase() const
return const_cast<StringImpl&>(*this);
}
unsigned StringImpl::case_insensitive_hash() const
{
return case_insensitive_string_hash(characters(), length());
}
void StringImpl::compute_hash() const
{
if (!length())

2
AK/StringImpl.h
View file

@ -75,6 +75,8 @@ public:
return m_hash;
}
unsigned case_insensitive_hash() const;
bool is_fly() const { return m_fly; }
void set_fly(Badge<FlyString>, bool fly) const { m_fly = fly; }