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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/FlyString.h>
#include <AK/HashTable.h>
#include <AK/String.h>
#include <AK/StringUtils.h>
#include <AK/StringView.h>
namespace AK {
struct FlyStringImplTraits : public AK::Traits<StringImpl*> {
static unsigned hash(const StringImpl* s) { return s ? s->hash() : 0; }
static bool equals(const StringImpl* a, const StringImpl* b)
{
ASSERT(a);
ASSERT(b);
if (a == b)
return true;
if (a->length() != b->length())
return false;
return !__builtin_memcmp(a->characters(), b->characters(), a->length());
}
};
static HashTable<StringImpl*, FlyStringImplTraits>& fly_impls()
{
static HashTable<StringImpl*, FlyStringImplTraits>* table;
if (!table)
table = new HashTable<StringImpl*, FlyStringImplTraits>;
return *table;
}
void FlyString::did_destroy_impl(Badge<StringImpl>, StringImpl& impl)
{
fly_impls().remove(&impl);
}
FlyString::FlyString(const String& string)
{
if (string.is_null())
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 {
ASSERT((*it)->is_fly());
m_impl = *it;
}
}
FlyString::FlyString(const StringView& string)
: FlyString(static_cast<String>(string))
{
}
FlyString::FlyString(const char* string)
: FlyString(static_cast<String>(string))
{
}
int FlyString::to_int(bool& ok) const
{
return StringUtils::convert_to_int(view(), ok);
}
bool FlyString::equals_ignoring_case(const StringView& other) const
{
return StringUtils::equals_ignoring_case(view(), other);
}
FlyString FlyString::to_lowercase() const
{
return String(*m_impl).to_lowercase();
}
StringView FlyString::view() const
{
return { characters(), length() };
}
bool FlyString::operator==(const String& string) const
{
if (m_impl == string.impl())
return true;
return String(m_impl.ptr()) == string;
}
bool FlyString::operator==(const StringView& string) const
{
return String(string) == String(m_impl.ptr());
}
bool FlyString::operator==(const char* string) const
{
if (is_null())
return !string;
if (!string)
return false;
return !__builtin_strcmp(m_impl->characters(), string);
}
}
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