mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-22 23:50:19 +00:00
a4099fc756
If we're constructing a FlyString from a StringView, and we already have a matching StringImpl in the table, use HashTable::find() to locate the existing string without creating a temporary String.
159 lines
3.8 KiB
C++
159 lines
3.8 KiB
C++
/*
|
|
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/FlyString.h>
|
|
#include <AK/HashTable.h>
|
|
#include <AK/Optional.h>
|
|
#include <AK/Singleton.h>
|
|
#include <AK/String.h>
|
|
#include <AK/StringUtils.h>
|
|
#include <AK/StringView.h>
|
|
|
|
namespace AK {
|
|
|
|
struct FlyStringImplTraits : public Traits<StringImpl*> {
|
|
static unsigned hash(const StringImpl* s) { return s ? s->hash() : 0; }
|
|
static bool equals(const StringImpl* a, const StringImpl* b)
|
|
{
|
|
VERIFY(a);
|
|
VERIFY(b);
|
|
return *a == *b;
|
|
}
|
|
};
|
|
|
|
static AK::Singleton<HashTable<StringImpl*, FlyStringImplTraits>> s_table;
|
|
|
|
static HashTable<StringImpl*, FlyStringImplTraits>& fly_impls()
|
|
{
|
|
return *s_table;
|
|
}
|
|
|
|
void FlyString::did_destroy_impl(Badge<StringImpl>, StringImpl& impl)
|
|
{
|
|
fly_impls().remove(&impl);
|
|
}
|
|
|
|
FlyString::FlyString(const String& string)
|
|
{
|
|
if (string.is_null())
|
|
return;
|
|
if (string.impl()->is_fly()) {
|
|
m_impl = string.impl();
|
|
return;
|
|
}
|
|
auto it = fly_impls().find(const_cast<StringImpl*>(string.impl()));
|
|
if (it == fly_impls().end()) {
|
|
fly_impls().set(const_cast<StringImpl*>(string.impl()));
|
|
string.impl()->set_fly({}, true);
|
|
m_impl = string.impl();
|
|
} else {
|
|
VERIFY((*it)->is_fly());
|
|
m_impl = *it;
|
|
}
|
|
}
|
|
|
|
FlyString::FlyString(StringView const& string)
|
|
{
|
|
if (string.is_null())
|
|
return;
|
|
auto it = fly_impls().find(string.hash(), [&](auto& candidate) {
|
|
return string == candidate;
|
|
});
|
|
if (it == fly_impls().end()) {
|
|
auto new_string = string.to_string();
|
|
fly_impls().set(new_string.impl());
|
|
new_string.impl()->set_fly({}, true);
|
|
m_impl = new_string.impl();
|
|
} else {
|
|
VERIFY((*it)->is_fly());
|
|
m_impl = *it;
|
|
}
|
|
}
|
|
|
|
FlyString::FlyString(const char* string)
|
|
: FlyString(static_cast<String>(string))
|
|
{
|
|
}
|
|
|
|
template<typename T>
|
|
Optional<T> FlyString::to_int() const
|
|
{
|
|
return StringUtils::convert_to_int<T>(view());
|
|
}
|
|
|
|
template Optional<i8> FlyString::to_int() const;
|
|
template Optional<i16> FlyString::to_int() const;
|
|
template Optional<i32> FlyString::to_int() const;
|
|
template Optional<i64> FlyString::to_int() const;
|
|
|
|
template<typename T>
|
|
Optional<T> FlyString::to_uint() const
|
|
{
|
|
return StringUtils::convert_to_uint<T>(view());
|
|
}
|
|
|
|
template Optional<u8> FlyString::to_uint() const;
|
|
template Optional<u16> FlyString::to_uint() const;
|
|
template Optional<u32> FlyString::to_uint() const;
|
|
template Optional<u64> FlyString::to_uint() const;
|
|
|
|
bool FlyString::equals_ignoring_case(const StringView& other) const
|
|
{
|
|
return StringUtils::equals_ignoring_case(view(), other);
|
|
}
|
|
|
|
bool FlyString::starts_with(const StringView& str, CaseSensitivity case_sensitivity) const
|
|
{
|
|
return StringUtils::starts_with(view(), str, case_sensitivity);
|
|
}
|
|
|
|
bool FlyString::ends_with(const StringView& str, CaseSensitivity case_sensitivity) const
|
|
{
|
|
return StringUtils::ends_with(view(), str, case_sensitivity);
|
|
}
|
|
|
|
FlyString FlyString::to_lowercase() const
|
|
{
|
|
return String(*m_impl).to_lowercase();
|
|
}
|
|
|
|
StringView FlyString::view() const
|
|
{
|
|
return { characters(), length() };
|
|
}
|
|
|
|
bool FlyString::operator==(const String& other) const
|
|
{
|
|
if (m_impl == other.impl())
|
|
return true;
|
|
|
|
if (!m_impl)
|
|
return !other.impl();
|
|
|
|
if (!other.impl())
|
|
return false;
|
|
|
|
if (length() != other.length())
|
|
return false;
|
|
|
|
return !__builtin_memcmp(characters(), other.characters(), length());
|
|
}
|
|
|
|
bool FlyString::operator==(const StringView& string) const
|
|
{
|
|
return *this == String(string);
|
|
}
|
|
|
|
bool FlyString::operator==(const char* string) const
|
|
{
|
|
if (is_null())
|
|
return !string;
|
|
if (!string)
|
|
return false;
|
|
return !__builtin_strcmp(m_impl->characters(), string);
|
|
}
|
|
|
|
}
|