/* * 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" #include <wtf/PassOwnPtr.h> 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 PassOwnPtr<TextCodec> newStreamingTextDecoderUTF16LE(const TextEncoding&, const void*) { return new TextCodecUTF16(true); } static PassOwnPtr<TextCodec> newStreamingTextDecoderUTF16BE(const TextEncoding&, const void*) { return 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