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Libraries: Move to Userland/Libraries/

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Andreas Kling 2021-01-12 12:17:30 +01:00
parent dc28c07fa5
commit 13d7c09125
1857 changed files with 266 additions and 274 deletions
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196
Libraries/LibJS/Runtime/StringOrSymbol.h
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@ -1,196 +0,0 @@
/*
* Copyright (c) 2020, Matthew Olsson <matthewcolsson@gmail.com>
* 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.
*/
#pragma once
#include <AK/FlyString.h>
#include <LibJS/Runtime/PrimitiveString.h>
#include <LibJS/Runtime/Symbol.h>
#include <LibJS/Runtime/Value.h>
namespace JS {
class StringOrSymbol {
public:
static StringOrSymbol from_value(GlobalObject& global_object, Value value)
{
if (value.is_empty())
return {};
if (value.is_symbol())
return &value.as_symbol();
auto string = value.to_string(global_object);
if (string.is_null())
return {};
return string;
}
StringOrSymbol() = default;
StringOrSymbol(const char* chars)
: m_ptr(StringImpl::create(chars).leak_ref())
{
}
StringOrSymbol(const String& string)
: m_ptr(string.impl())
{
ASSERT(!string.is_null());
as_string_impl().ref();
}
StringOrSymbol(const FlyString& string)
: m_ptr(string.impl())
{
ASSERT(!string.is_null());
as_string_impl().ref();
}
~StringOrSymbol()
{
if (is_string())
as_string_impl().unref();
}
StringOrSymbol(const Symbol* symbol)
: m_ptr(symbol)
{
set_symbol_flag();
}
StringOrSymbol(const StringOrSymbol& other)
{
m_ptr = other.m_ptr;
if (is_string())
as_string_impl().ref();
}
StringOrSymbol(StringOrSymbol&& other)
{
m_ptr = exchange(other.m_ptr, nullptr);
}
ALWAYS_INLINE bool is_valid() const { return m_ptr != nullptr; }
ALWAYS_INLINE bool is_symbol() const { return is_valid() && (bits() & 1ul); }
ALWAYS_INLINE bool is_string() const { return is_valid() && !(bits() & 1ul); }
ALWAYS_INLINE String as_string() const
{
ASSERT(is_string());
return as_string_impl();
}
ALWAYS_INLINE const Symbol* as_symbol() const
{
ASSERT(is_symbol());
return reinterpret_cast<const Symbol*>(bits() & ~1ul);
}
String to_display_string() const
{
if (is_string())
return as_string();
if (is_symbol())
return as_symbol()->to_string();
ASSERT_NOT_REACHED();
}
Value to_value(VM& vm) const
{
if (is_string())
return js_string(vm, as_string());
if (is_symbol())
return const_cast<Symbol*>(as_symbol());
return {};
}
void visit_edges(Cell::Visitor& visitor)
{
if (is_symbol())
visitor.visit(const_cast<Symbol*>(as_symbol()));
}
ALWAYS_INLINE bool operator==(const StringOrSymbol& other) const
{
if (is_string())
return other.is_string() && as_string_impl() == other.as_string_impl();
if (is_symbol())
return other.is_symbol() && as_symbol() == other.as_symbol();
return true;
}
StringOrSymbol& operator=(const StringOrSymbol& other)
{
if (this == &other)
return *this;
m_ptr = other.m_ptr;
if (is_string())
as_string_impl().ref();
return *this;
}
StringOrSymbol& operator=(StringOrSymbol&& other)
{
if (this != &other)
m_ptr = exchange(other.m_ptr, nullptr);
return *this;
}
unsigned hash() const
{
if (is_string())
return as_string_impl().hash();
return ptr_hash(as_symbol());
}
private:
ALWAYS_INLINE u64 bits() const
{
return reinterpret_cast<uintptr_t>(m_ptr);
}
ALWAYS_INLINE void set_symbol_flag()
{
m_ptr = reinterpret_cast<const void*>(bits() | 1ul);
}
ALWAYS_INLINE const StringImpl& as_string_impl() const
{
ASSERT(is_string());
return *reinterpret_cast<const StringImpl*>(m_ptr);
}
const void* m_ptr { nullptr };
};
}
template<>
struct AK::Traits<JS::StringOrSymbol> : public GenericTraits<JS::StringOrSymbol> {
static unsigned hash(const JS::StringOrSymbol& key)
{
return key.hash();
}
};