/*
* Copyright (C) 2013 Google Inc. All rights reserved.
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* 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
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* contributors may be used to endorse or promote products derived from
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*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#ifndef StringUTF8Adaptor_h
#define StringUTF8Adaptor_h
#include "wtf/text/CString.h"
#include "wtf/text/TextEncoding.h"
#include "wtf/text/WTFString.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 {
public:
enum ShouldNormalize {
DoNotNormalize,
Normalize
};
explicit StringUTF8Adaptor(const String& string, ShouldNormalize normalize = DoNotNormalize, UnencodableHandling handling = EntitiesForUnencodables)
: m_data(0)
, m_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()) {
m_data = reinterpret_cast<const char*>(string.characters8());
m_length = string.length();
} else {
if (normalize == Normalize)
m_utf8Buffer = UTF8Encoding().normalizeAndEncode(string, handling);
else
m_utf8Buffer = string.utf8();
m_data = m_utf8Buffer.data();
m_length = m_utf8Buffer.length();
}
}
const char* data() const { return m_data; }
size_t length() const { return m_length; }
private:
CString m_utf8Buffer;
const char* m_data;
size_t m_length;
};
} // namespace WTF
using WTF::StringUTF8Adaptor;
#endif // StringUTF8Adaptor_h