diff options
Diffstat (limited to 'src/3rdparty/webkit/WebCore/platform/text/TextCodecUTF16.cpp')
-rw-r--r-- | src/3rdparty/webkit/WebCore/platform/text/TextCodecUTF16.cpp | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/src/3rdparty/webkit/WebCore/platform/text/TextCodecUTF16.cpp b/src/3rdparty/webkit/WebCore/platform/text/TextCodecUTF16.cpp new file mode 100644 index 0000000..a4d0d28 --- /dev/null +++ b/src/3rdparty/webkit/WebCore/platform/text/TextCodecUTF16.cpp @@ -0,0 +1,140 @@ +/* + * Copyright (C) 2004, 2006, 2008 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 COMPUTER, 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 COMPUTER, 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. + */ + +#include "config.h" +#include "TextCodecUTF16.h" + +#include "CString.h" +#include "PlatformString.h" +#include "StringBuffer.h" + +using std::auto_ptr; + +namespace WebCore { + +void TextCodecUTF16::registerEncodingNames(EncodingNameRegistrar registrar) +{ + registrar("UTF-16LE", "UTF-16LE"); + registrar("UTF-16BE", "UTF-16BE"); + + registrar("ISO-10646-UCS-2", "UTF-16LE"); + registrar("UCS-2", "UTF-16LE"); + registrar("UTF-16", "UTF-16LE"); + registrar("Unicode", "UTF-16LE"); + registrar("csUnicode", "UTF-16LE"); + registrar("unicodeFEFF", "UTF-16LE"); + + registrar("unicodeFFFE", "UTF-16BE"); +} + +static auto_ptr<TextCodec> newStreamingTextDecoderUTF16LE(const TextEncoding&, const void*) +{ + return auto_ptr<TextCodec>(new TextCodecUTF16(true)); +} + +static auto_ptr<TextCodec> newStreamingTextDecoderUTF16BE(const TextEncoding&, const void*) +{ + return auto_ptr<TextCodec>(new TextCodecUTF16(false)); +} + +void TextCodecUTF16::registerCodecs(TextCodecRegistrar registrar) +{ + registrar("UTF-16LE", newStreamingTextDecoderUTF16LE, 0); + registrar("UTF-16BE", newStreamingTextDecoderUTF16BE, 0); +} + +String TextCodecUTF16::decode(const char* bytes, size_t length, bool, bool, bool&) +{ + if (!length) + return String(); + + const unsigned char* p = reinterpret_cast<const unsigned char*>(bytes); + size_t numBytes = length + m_haveBufferedByte; + size_t numChars = numBytes / 2; + + StringBuffer buffer(numChars); + UChar* q = buffer.characters(); + + if (m_haveBufferedByte) { + UChar c; + if (m_littleEndian) + c = m_bufferedByte | (p[0] << 8); + else + c = (m_bufferedByte << 8) | p[0]; + *q++ = c; + m_haveBufferedByte = false; + p += 1; + numChars -= 1; + } + + if (m_littleEndian) { + for (size_t i = 0; i < numChars; ++i) { + UChar c = p[0] | (p[1] << 8); + p += 2; + *q++ = c; + } + } else { + for (size_t i = 0; i < numChars; ++i) { + UChar c = (p[0] << 8) | p[1]; + p += 2; + *q++ = c; + } + } + + if (numBytes & 1) { + ASSERT(!m_haveBufferedByte); + m_haveBufferedByte = true; + m_bufferedByte = p[0]; + } + + buffer.shrink(q - buffer.characters()); + + return String::adopt(buffer); +} + +CString TextCodecUTF16::encode(const UChar* characters, size_t length, UnencodableHandling) +{ + char* bytes; + CString string = CString::newUninitialized(length * 2, bytes); + + // FIXME: CString is not a reasonable data structure for encoded UTF-16, which will have + // null characters inside it. Perhaps the result of encode should not be a CString? + if (m_littleEndian) + for (size_t i = 0; i < length; ++i) { + UChar c = characters[i]; + bytes[i * 2] = c; + bytes[i * 2 + 1] = c >> 8; + } + else + for (size_t i = 0; i < length; ++i) { + UChar c = characters[i]; + bytes[i * 2] = c >> 8; + bytes[i * 2 + 1] = c; + } + + return string; +} + +} // namespace WebCore |