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