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85 lines
3.3 KiB
C++
85 lines
3.3 KiB
C++
/*
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* Copyright (C) 2013 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SKY_ENGINE_WTF_TEXT_STRINGUTF8ADAPTOR_H_
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#define SKY_ENGINE_WTF_TEXT_STRINGUTF8ADAPTOR_H_
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#include "flutter/sky/engine/wtf/text/CString.h"
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#include "flutter/sky/engine/wtf/text/TextEncoding.h"
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#include "flutter/sky/engine/wtf/text/WTFString.h"
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namespace WTF {
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// This class lets you get UTF-8 data out of a String without mallocing a
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// separate buffer to hold the data if the String happens to be 8 bit and
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// contain only ASCII characters.
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class StringUTF8Adaptor {
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public:
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enum ShouldNormalize { DoNotNormalize, Normalize };
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explicit StringUTF8Adaptor(
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const String& string,
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ShouldNormalize normalize = DoNotNormalize,
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UnencodableHandling handling = EntitiesForUnencodables)
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: m_data(0), m_length(0) {
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if (string.isEmpty())
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return;
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// Unfortunately, 8 bit WTFStrings are encoded in Latin-1 and GURL uses
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// UTF-8 when processing 8 bit strings. If |relative| is entirely ASCII, we
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// luck out and can avoid mallocing a new buffer to hold the UTF-8 data
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// because UTF-8 and Latin-1 use the same code units for ASCII code points.
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if (string.is8Bit() && string.containsOnlyASCII()) {
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m_data = reinterpret_cast<const char*>(string.characters8());
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m_length = string.length();
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} else {
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if (normalize == Normalize)
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m_utf8Buffer = UTF8Encoding().normalizeAndEncode(string, handling);
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else
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m_utf8Buffer = string.utf8();
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m_data = m_utf8Buffer.data();
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m_length = m_utf8Buffer.length();
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}
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}
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const char* data() const { return m_data; }
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size_t length() const { return m_length; }
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private:
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CString m_utf8Buffer;
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const char* m_data;
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size_t m_length;
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};
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} // namespace WTF
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using WTF::StringUTF8Adaptor;
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#endif // SKY_ENGINE_WTF_TEXT_STRINGUTF8ADAPTOR_H_
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