XMLUTF16Transcoder.cpp
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上传日期:2007-01-10
资源大小:6948k
文件大小:9k
源码类别:
xml/soap/webservice
开发平台:
C/C++
- /*
- * 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",
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- * permission of the Apache Software Foundation.
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- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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- * 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 <util/BitOps.hpp>
- #include <util/XMLUTF16Transcoder.hpp>
- #include <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;
- }