/ATF2/control-software/epics-3.14.8/extensions/src/ChannelArchiver/ThirdParty/xerces-c-src2_4_0/src/xercesc/util/XMLChTranscoder.cpp

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 * ====================================================================
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 * 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
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 */


// ---------------------------------------------------------------------------
//  Includes
// ---------------------------------------------------------------------------
#include <xercesc/util/BitOps.hpp>
#include <xercesc/util/XMLChTranscoder.hpp>
#include <string.h>

XERCES_CPP_NAMESPACE_BEGIN

// ---------------------------------------------------------------------------
//  XMLChTranscoder: Constructors and Destructor
// ---------------------------------------------------------------------------
XMLChTranscoder::XMLChTranscoder(const  XMLCh* const    encodingName
                                , const unsigned int    blockSize) :

    XMLTranscoder(encodingName, blockSize)
{
}


XMLChTranscoder::~XMLChTranscoder()
{
}


// ---------------------------------------------------------------------------
//  XMLChTranscoder: Implementation of the transcoder API
// ---------------------------------------------------------------------------
unsigned int
XMLChTranscoder::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(XMLCh);
    const unsigned int countToDo = srcChars < maxChars ? srcChars : maxChars;

    //
    //  Copy over the count of chars that we precalculated. Notice we
    //  convert char count to byte count here!!!
    //
    memcpy(toFill, srcData, countToDo * sizeof(XMLCh));

    // Set the bytes eaten
    bytesEaten = countToDo * sizeof(XMLCh);

    // Set the character sizes to the fixed size
    memset(charSizes, sizeof(XMLCh), countToDo);

    // Return the chars we transcoded
    return countToDo;
}


unsigned int
XMLChTranscoder::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
    //  max chars we can store in the output byte buffer, and the number
    //  of chars in the source.
    //
    const unsigned int maxOutChars  = maxBytes / sizeof(XMLCh);
    const unsigned int countToDo    = maxOutChars < srcCount
                                    ? maxOutChars : srcCount;

    //
    //  Copy over the number of chars we calculated. Note that we have
    //  to convert the char count to a byte count!!
    //
    memcpy(toFill, srcData, countToDo * sizeof(XMLCh));

    // Set the chars eaten
    charsEaten = countToDo;

    // Return the bytes we transcoded
    return countToDo * sizeof(XMLCh);
}


bool XMLChTranscoder::canTranscodeTo(const unsigned int toCheck) const
{
    // We can handle anything
    return true;
}

XERCES_CPP_NAMESPACE_END