| /* |
| * 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 StringUTF8Adaptor_h |
| #define StringUTF8Adaptor_h |
| |
| #include "base/strings/string_piece.h" |
| #include "wtf/Allocator.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 final { |
| DISALLOW_NEW(); |
| |
| public: |
| explicit StringUTF8Adaptor(const String& string) : 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 { |
| 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; } |
| |
| base::StringPiece asStringPiece() const { |
| return base::StringPiece(m_data, m_length); |
| } |
| |
| private: |
| CString m_utf8Buffer; |
| const char* m_data; |
| size_t m_length; |
| }; |
| |
| } // namespace WTF |
| |
| using WTF::StringUTF8Adaptor; |
| |
| #endif // StringUTF8Adaptor_h |