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/*
* Copyright (C) 2010 Apple Inc. 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 APPLE INC. ``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 APPLE INC. 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.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_STRING_CONCATENATE_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_STRING_CONCATENATE_H_
#include <string_view>
#include "base/containers/span.h"
#include "base/notreached.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string.h"
namespace WTF {
template <typename StringType>
class StringTypeAdapter {
DISALLOW_NEW();
};
template <>
class StringTypeAdapter<char> {
DISALLOW_NEW();
public:
explicit StringTypeAdapter<char>(char buffer) : buffer_(buffer) {}
size_t length() const { return 1; }
bool Is8Bit() const { return true; }
void WriteTo(base::span<LChar> destination) const {
destination[0] = buffer_;
}
void WriteTo(base::span<UChar> destination) const {
destination[0] = buffer_;
}
private:
const LChar buffer_;
};
template <>
class StringTypeAdapter<LChar> : public StringTypeAdapter<char> {
public:
explicit StringTypeAdapter<LChar>(LChar buffer)
: StringTypeAdapter<char>(buffer) {}
};
template <>
class StringTypeAdapter<UChar> {
DISALLOW_NEW();
public:
explicit StringTypeAdapter<UChar>(UChar buffer) : buffer_(buffer) {}
size_t length() const { return 1; }
bool Is8Bit() const { return buffer_ <= 0xff; }
void WriteTo(base::span<LChar> destination) const {
DCHECK(Is8Bit());
destination[0] = static_cast<LChar>(buffer_);
}
void WriteTo(base::span<UChar> destination) const {
destination[0] = buffer_;
}
private:
const UChar buffer_;
};
template <>
class WTF_EXPORT StringTypeAdapter<const char*> {
DISALLOW_NEW();
public:
explicit StringTypeAdapter<const char*>(const char* buffer)
: buffer_(base::as_byte_span(std::string_view(buffer))) {}
size_t length() const { return buffer_.size(); }
bool Is8Bit() const { return true; }
void WriteTo(base::span<LChar> destination) const;
void WriteTo(base::span<UChar> destination) const;
private:
const base::span<const LChar> buffer_;
};
template <>
class WTF_EXPORT StringTypeAdapter<const LChar*>
: StringTypeAdapter<const char*> {
public:
explicit StringTypeAdapter<const LChar*>(const LChar* buffer)
: StringTypeAdapter<const char*>(reinterpret_cast<const char*>(buffer)) {}
};
template <>
class WTF_EXPORT StringTypeAdapter<char*>
: public StringTypeAdapter<const char*> {
public:
explicit StringTypeAdapter<char*>(char* buffer)
: StringTypeAdapter<const char*>(buffer) {}
};
template <>
class WTF_EXPORT StringTypeAdapter<LChar*>
: public StringTypeAdapter<const LChar*> {
public:
explicit StringTypeAdapter<LChar*>(LChar* buffer)
: StringTypeAdapter<const LChar*>(buffer) {}
};
template <>
class WTF_EXPORT StringTypeAdapter<const UChar*> {
DISALLOW_NEW();
public:
explicit StringTypeAdapter(const UChar* buffer);
size_t length() const { return buffer_.size(); }
bool Is8Bit() const { return false; }
void WriteTo(base::span<LChar> destination) const { NOTREACHED(); }
void WriteTo(base::span<UChar> destination) const;
private:
const base::span<const UChar> buffer_;
};
template <>
class WTF_EXPORT StringTypeAdapter<StringView> {
DISALLOW_NEW();
public:
explicit StringTypeAdapter(const StringView& view) : view_(view) {}
size_t length() const { return view_.length(); }
bool Is8Bit() const { return view_.Is8Bit(); }
void WriteTo(base::span<LChar> destination) const;
void WriteTo(base::span<UChar> destination) const;
private:
const StringView view_;
};
template <>
class StringTypeAdapter<String> : public StringTypeAdapter<StringView> {
public:
explicit StringTypeAdapter(const String& string)
: StringTypeAdapter<StringView>(string) {}
};
template <>
class StringTypeAdapter<AtomicString> : public StringTypeAdapter<StringView> {
public:
explicit StringTypeAdapter(const AtomicString& string)
: StringTypeAdapter<StringView>(string) {}
};
} // namespace WTF
#include "third_party/blink/renderer/platform/wtf/text/string_operators.h"
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_STRING_CONCATENATE_H_
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