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/*
* Copyright (C) 2013 Google 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* 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
* OWNER 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_UTF8_ADAPTOR_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_STRING_UTF8_ADAPTOR_H_
#include "base/strings/string_piece.h"
#include "third_party/blink/renderer/platform/wtf/allocator.h"
#include "third_party/blink/renderer/platform/wtf/text/cstring.h"
#include "third_party/blink/renderer/platform/wtf/text/text_encoding.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace WTF {
// This class lets you get UTF-8 data out of a String without mallocing a
// separate buffer to hold the data if the String happens to be 8 bit and
// contain only ASCII characters.
class StringUTF8Adaptor final {
DISALLOW_NEW();
public:
StringUTF8Adaptor(const String& string,
UTF8ConversionMode mode = kLenientUTF8Conversion)
: data_(nullptr), length_(0) {
if (string.IsEmpty())
return;
// Unfortunately, 8 bit WTFStrings are encoded in Latin-1 and GURL uses
// UTF-8 when processing 8 bit strings. If |relative| is entirely ASCII, we
// luck out and can avoid mallocing a new buffer to hold the UTF-8 data
// because UTF-8 and Latin-1 use the same code units for ASCII code points.
if (string.Is8Bit() && string.ContainsOnlyASCII()) {
data_ = reinterpret_cast<const char*>(string.Characters8());
length_ = string.length();
} else {
utf8_buffer_ = string.Utf8(mode);
data_ = utf8_buffer_.data();
length_ = utf8_buffer_.length();
}
}
const char* Data() const { return data_; }
size_t length() const { return length_; }
base::StringPiece AsStringPiece() const {
return base::StringPiece(data_, length_);
}
private:
CString utf8_buffer_;
const char* data_;
size_t length_;
};
} // namespace WTF
using WTF::StringUTF8Adaptor;
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_WTF_TEXT_STRING_UTF8_ADAPTOR_H_
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