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- /*
- * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
- #include <AK/CharacterTypes.h>
- #include <AK/Utf16View.h>
- #include <LibJS/Runtime/PrimitiveString.h>
- #include <LibJS/Runtime/VM.h>
- namespace JS {
- PrimitiveString::PrimitiveString(String string)
- : m_utf8_string(move(string))
- , m_has_utf8_string(true)
- {
- }
- PrimitiveString::PrimitiveString(Utf16String string)
- : m_utf16_string(move(string))
- , m_has_utf16_string(true)
- {
- }
- PrimitiveString::~PrimitiveString()
- {
- vm().string_cache().remove(m_utf8_string);
- }
- String const& PrimitiveString::string() const
- {
- if (!m_has_utf8_string) {
- m_utf8_string = m_utf16_string.to_utf8();
- m_has_utf8_string = true;
- }
- return m_utf8_string;
- }
- Utf16String const& PrimitiveString::utf16_string() const
- {
- if (!m_has_utf16_string) {
- m_utf16_string = Utf16String(m_utf8_string);
- m_has_utf16_string = true;
- }
- return m_utf16_string;
- }
- Utf16View PrimitiveString::utf16_string_view() const
- {
- return utf16_string().view();
- }
- PrimitiveString* js_string(Heap& heap, Utf16View const& view)
- {
- return js_string(heap, Utf16String(view));
- }
- PrimitiveString* js_string(VM& vm, Utf16View const& view)
- {
- return js_string(vm.heap(), view);
- }
- PrimitiveString* js_string(Heap& heap, Utf16String string)
- {
- if (string.is_empty())
- return &heap.vm().empty_string();
- if (string.length_in_code_units() == 1) {
- u16 code_unit = string.code_unit_at(0);
- if (is_ascii(code_unit))
- return &heap.vm().single_ascii_character_string(static_cast<u8>(code_unit));
- }
- return heap.allocate_without_global_object<PrimitiveString>(move(string));
- }
- PrimitiveString* js_string(VM& vm, Utf16String string)
- {
- return js_string(vm.heap(), move(string));
- }
- PrimitiveString* js_string(Heap& heap, String string)
- {
- if (string.is_empty())
- return &heap.vm().empty_string();
- if (string.length() == 1) {
- auto ch = static_cast<u8>(string.characters()[0]);
- if (is_ascii(ch))
- return &heap.vm().single_ascii_character_string(ch);
- }
- auto& string_cache = heap.vm().string_cache();
- auto it = string_cache.find(string);
- if (it == string_cache.end()) {
- auto* new_string = heap.allocate_without_global_object<PrimitiveString>(string);
- string_cache.set(move(string), new_string);
- return new_string;
- }
- return it->value;
- }
- PrimitiveString* js_string(VM& vm, String string)
- {
- return js_string(vm.heap(), move(string));
- }
- }
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