024367d82e
It's very common to encounter single-character strings in JavaScript on the web. We can make such strings significantly lighter by having a 1-character inline capacity on the Vectors.
61 lines
1.4 KiB
C++
61 lines
1.4 KiB
C++
/*
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* Copyright (c) 2021, Tim Flynn <trflynn89@pm.me>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/NonnullRefPtr.h>
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#include <AK/RefCounted.h>
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#include <AK/String.h>
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#include <AK/Types.h>
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#include <AK/Vector.h>
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namespace JS {
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namespace Detail {
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class Utf16StringImpl : public RefCounted<Utf16StringImpl> {
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public:
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~Utf16StringImpl() = default;
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static NonnullRefPtr<Utf16StringImpl> create();
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static NonnullRefPtr<Utf16StringImpl> create(Vector<u16, 1>);
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static NonnullRefPtr<Utf16StringImpl> create(StringView const&);
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static NonnullRefPtr<Utf16StringImpl> create(Utf16View const&);
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Vector<u16, 1> const& string() const;
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Utf16View view() const;
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private:
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Utf16StringImpl() = default;
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explicit Utf16StringImpl(Vector<u16, 1> string);
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Vector<u16, 1> m_string;
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};
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}
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class Utf16String {
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public:
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Utf16String();
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explicit Utf16String(Vector<u16, 1>);
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explicit Utf16String(StringView const&);
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explicit Utf16String(Utf16View const&);
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Vector<u16, 1> const& string() const;
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Utf16View view() const;
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Utf16View substring_view(size_t code_unit_offset, size_t code_unit_length) const;
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Utf16View substring_view(size_t code_unit_offset) const;
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String to_utf8() const;
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u16 code_unit_at(size_t index) const;
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size_t length_in_code_units() const;
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bool is_empty() const;
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private:
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NonnullRefPtr<Detail::Utf16StringImpl> m_string;
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};
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}
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