| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 1999-2000 The Apache Software Foundation. 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. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xerces" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache\@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR |
| * ITS 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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation, and was |
| * originally based on software copyright (c) 1999, International |
| * Business Machines, Inc., http://www.ibm.com . For more information |
| * on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| |
| // --------------------------------------------------------------------------- |
| // Includes |
| // --------------------------------------------------------------------------- |
| #include <xercesc/util/BitOps.hpp> |
| #include <xercesc/util/XMLUTF16Transcoder.hpp> |
| #include <xercesc/util/TranscodingException.hpp> |
| #include <string.h> |
| |
| |
| |
| // --------------------------------------------------------------------------- |
| // XMLUTF16Transcoder: Constructors and Destructor |
| // --------------------------------------------------------------------------- |
| XMLUTF16Transcoder::XMLUTF16Transcoder( const XMLCh* const encodingName |
| , const unsigned int blockSize |
| , const bool swapped) : |
| |
| XMLTranscoder(encodingName, blockSize) |
| , fSwapped(swapped) |
| { |
| } |
| |
| |
| XMLUTF16Transcoder::~XMLUTF16Transcoder() |
| { |
| } |
| |
| |
| // --------------------------------------------------------------------------- |
| // XMLUTF16Transcoder: Implementation of the transcoder API |
| // --------------------------------------------------------------------------- |
| unsigned int |
| XMLUTF16Transcoder::transcodeFrom( const XMLByte* const srcData |
| , const unsigned int srcCount |
| , XMLCh* const toFill |
| , const unsigned int maxChars |
| , unsigned int& bytesEaten |
| , unsigned char* const charSizes) |
| { |
| // If debugging, make sure that the block size is legal |
| #if defined(XERCES_DEBUG) |
| checkBlockSize(maxChars); |
| #endif |
| |
| // |
| // Calculate the max chars we can do here. Its the lesser of the |
| // max output chars and the number of chars in the source. |
| // |
| const unsigned int srcChars = srcCount / sizeof(UTF16Ch); |
| const unsigned int countToDo = srcChars < maxChars ? srcChars : maxChars; |
| |
| // Look at the source data as UTF16 chars |
| const UTF16Ch* asUTF16 = (const UTF16Ch*)srcData; |
| |
| // And get a mutable pointer to the output |
| XMLCh* outPtr = toFill; |
| |
| // |
| // If its swapped, we have to do a char by char swap and cast. Else |
| // we have to check whether our XMLCh and UTF16Ch types are the same |
| // size or not. If so, we can optimize by just doing a buffer copy. |
| // |
| if (fSwapped) |
| { |
| // |
| // And then do the swapping loop for the count we precalculated. Note |
| // that this also handles size conversion as well if XMLCh is not the |
| // same size as UTF16Ch. |
| // |
| for (unsigned int index = 0; index < countToDo; index++) |
| *outPtr++ = BitOps::swapBytes(*asUTF16++); |
| } |
| else |
| { |
| // |
| // If the XMLCh type is the same size as a UTF16 value on this |
| // platform, then we can do just a buffer copy straight to the target |
| // buffer since our source chars are UTF-16 chars. If its not, then |
| // we still have to do a loop and assign each one, in order to |
| // implicitly convert. |
| // |
| if (sizeof(XMLCh) == sizeof(UTF16Ch)) |
| { |
| // Notice we convert char count to byte count here!!! |
| memcpy(toFill, srcData, countToDo * sizeof(UTF16Ch)); |
| } |
| else |
| { |
| for (unsigned int index = 0; index < countToDo; index++) |
| *outPtr++ = XMLCh(*asUTF16++); |
| } |
| } |
| |
| // Set the bytes eaten |
| bytesEaten = countToDo * sizeof(UTF16Ch); |
| |
| // Set the character sizes to the fixed size |
| memset(charSizes, sizeof(UTF16Ch), countToDo); |
| |
| // Return the chars we transcoded |
| return countToDo; |
| } |
| |
| |
| unsigned int |
| XMLUTF16Transcoder::transcodeTo(const XMLCh* const srcData |
| , const unsigned int srcCount |
| , XMLByte* const toFill |
| , const unsigned int maxBytes |
| , unsigned int& charsEaten |
| , const UnRepOpts options) |
| { |
| // If debugging, make sure that the block size is legal |
| #if defined(XERCES_DEBUG) |
| checkBlockSize(maxBytes); |
| #endif |
| |
| // |
| // Calculate the max chars we can do here. Its the lesser of the |
| // chars that we can fit into the output buffer, and the source |
| // chars available. |
| // |
| const unsigned int maxOutChars = maxBytes / sizeof(UTF16Ch); |
| const unsigned int countToDo = srcCount < maxOutChars ? srcCount : maxOutChars; |
| |
| // |
| // Get a pointer tot he output buffer in the UTF-16 character format |
| // that we need to work with. And get a mutable pointer to the source |
| // character buffer. |
| // |
| UTF16Ch* outPtr = (UTF16Ch*)toFill; |
| const XMLCh* srcPtr = srcData; |
| |
| // |
| // If the target format is swapped from our native format, then handle |
| // it one way, else handle it another. |
| // |
| if (fSwapped) |
| { |
| // |
| // And then do the swapping loop for the count we precalculated. Note |
| // that this also handles size conversion as well if XMLCh is not the |
| // same size as UTF16Ch. |
| // |
| for (unsigned int index = 0; index < countToDo; index++) |
| { |
| // To avoid flakey compilers, use a temp |
| const UTF16Ch tmpCh = UTF16Ch(*srcPtr++); |
| *outPtr++ = BitOps::swapBytes(tmpCh); |
| } |
| } |
| else |
| { |
| // |
| // If XMLCh and UTF16Ch are the same size, we can just do a fast |
| // memory copy. Otherwise, we have to do a loop and downcast each |
| // character into its new 16 bit storage. |
| // |
| if (sizeof(XMLCh) == sizeof(UTF16Ch)) |
| { |
| // Notice we convert char count to byte count here!!! |
| memcpy(toFill, srcData, countToDo * sizeof(UTF16Ch)); |
| } |
| else |
| { |
| for (unsigned int index = 0; index < countToDo; index++) |
| *outPtr++ = UTF16Ch(*srcPtr++); |
| } |
| } |
| |
| // Set the chars eaten to the calculated number we ate |
| charsEaten = countToDo; |
| |
| //Return the bytes we ate. Note we convert to a byte count here! |
| return countToDo * sizeof(UTF16Ch); |
| } |
| |
| |
| bool XMLUTF16Transcoder::canTranscodeTo(const unsigned int toCheck) const |
| { |
| // We can handle anything |
| return true; |
| } |
