/* * 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. 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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> XERCES_CPP_NAMESPACE_BEGIN // --------------------------------------------------------------------------- // 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; } XERCES_CPP_NAMESPACE_END