iconvtransservice.cpp

来自「IBM的解析xml的工具Xerces的源代码」· C++ 代码 · 共 585 行 · 第 1/2 页

        }
        wideCharBuf[wLent] = 0x00;

        // Calc the needed size.
        const size_t neededLen = ::wcstombs(NULL, wideCharBuf, 0);
        if (neededLen == -1)
        {
            delete [] allocatedArray;
            retVal = new char[1];
            retVal[0] = 0;
            return retVal;
        }

        retVal = new char[neededLen + 1];
        ::wcstombs(retVal, wideCharBuf, neededLen);
        retVal[neededLen] = 0;
        delete [] allocatedArray;
    }
    else
    {
        retVal = new char[1];
        retVal[0] = 0;
    }
    return retVal;
}

char* IconvLCPTranscoder::transcode(const XMLCh* const toTranscode,
                                    MemoryManager* const manager)
{
    if (!toTranscode)
        return 0;

    char* retVal = 0;
    if (*toTranscode)
    {
        unsigned int  wLent = getWideCharLength(toTranscode);

        wchar_t       tmpWideCharArr[gTempBuffArraySize];
        wchar_t*      allocatedArray = 0;
        wchar_t*      wideCharBuf = 0;

        if (wLent >= gTempBuffArraySize)
            wideCharBuf = allocatedArray = (wchar_t*) manager->allocate
            (
                (wLent + 1) * sizeof(wchar_t)
            );//new wchar_t[wLent + 1];
        else
            wideCharBuf = tmpWideCharArr;

        for (unsigned int i = 0; i < wLent; i++)
        {
            wideCharBuf[i] = toTranscode[i];
        }
        wideCharBuf[wLent] = 0x00;

        // Calc the needed size.
        const size_t neededLen = ::wcstombs(NULL, wideCharBuf, 0);
        if (neededLen == -1)
        {
            manager->deallocate(allocatedArray);//delete [] allocatedArray;
            retVal = (char*) manager->allocate(sizeof(char)); //new char[1];
            retVal[0] = 0;
            return retVal;
        }

        retVal = (char*) manager->allocate((neededLen + 1) * sizeof(char));//new char[neededLen + 1];
        ::wcstombs(retVal, wideCharBuf, neededLen);
        retVal[neededLen] = 0;
        manager->deallocate(allocatedArray);//delete [] allocatedArray;
    }
    else
    {
        retVal = (char*) manager->allocate(sizeof(char));//new char[1];
        retVal[0] = 0;
    }
    return retVal;
}


bool IconvLCPTranscoder::transcode( const   XMLCh* const    toTranscode
                                    ,       char* const     toFill
                                    , const unsigned int    maxBytes
                                    , MemoryManager* const  manager)
{
    // Watch for a couple of pyscho corner cases
    if (!toTranscode || !maxBytes)
    {
        toFill[0] = 0;
        return true;
    }

    if (!*toTranscode)
    {
        toFill[0] = 0;
        return true;
    }

    unsigned int  wLent = getWideCharLength(toTranscode);
    wchar_t       tmpWideCharArr[gTempBuffArraySize];
    wchar_t*      allocatedArray = 0;
    wchar_t*      wideCharBuf = 0;

    if (wLent > maxBytes) {
        wLent = maxBytes;
    }

    if (maxBytes >= gTempBuffArraySize) {
        wideCharBuf = allocatedArray = (wchar_t*)
            manager->allocate
            (
                (maxBytes + 1) * sizeof(wchar_t)
            );//new wchar_t[maxBytes + 1];
    }
    else
        wideCharBuf = tmpWideCharArr;

    for (unsigned int i = 0; i < wLent; i++)
    {
        wideCharBuf[i] = toTranscode[i];
    }
    wideCharBuf[wLent] = 0x00;

    // Ok, go ahead and try the transcoding. If it fails, then ...
    size_t mblen = ::wcstombs(toFill, wideCharBuf, maxBytes);
    if (mblen == -1)
    {
        manager->deallocate(allocatedArray);//delete [] allocatedArray;
        return false;
    }

    // Cap it off just in case
    toFill[mblen] = 0;
    manager->deallocate(allocatedArray);//delete [] allocatedArray;
    return true;
}



XMLCh* IconvLCPTranscoder::transcode(const char* const toTranscode)
{
    if (!toTranscode)
        return 0;

    XMLCh* retVal = 0;
    if (*toTranscode)
    {
        const unsigned int len = calcRequiredSize(toTranscode);
        if (len == 0)
        {
            retVal = new XMLCh[1];
            retVal[0] = 0;
            return retVal;
        }

        wchar_t       tmpWideCharArr[gTempBuffArraySize];
        wchar_t*      allocatedArray = 0;
        wchar_t*      wideCharBuf = 0;

        if (len >= gTempBuffArraySize)
            wideCharBuf = allocatedArray = new wchar_t[len + 1];
        else
            wideCharBuf = tmpWideCharArr;

        ::mbstowcs(wideCharBuf, toTranscode, len);
        retVal = new XMLCh[len + 1];
        for (unsigned int i = 0; i < len; i++)
        {
            retVal[i] = (XMLCh) wideCharBuf[i];
        }
        retVal[len] = 0x00;
        delete [] allocatedArray;
    }
    else
    {
        retVal = new XMLCh[1];
        retVal[0] = 0;
    }
    return retVal;
}

XMLCh* IconvLCPTranscoder::transcode(const char* const toTranscode,
                                     MemoryManager* const manager)
{
    if (!toTranscode)
        return 0;

    XMLCh* retVal = 0;
    if (*toTranscode)
    {
        const unsigned int len = calcRequiredSize(toTranscode, manager);
        if (len == 0)
        {
            retVal = (XMLCh*) manager->allocate(sizeof(XMLCh)); //new XMLCh[1];
            retVal[0] = 0;
            return retVal;
        }

        wchar_t       tmpWideCharArr[gTempBuffArraySize];
        wchar_t*      allocatedArray = 0;
        wchar_t*      wideCharBuf = 0;

        if (len >= gTempBuffArraySize)
            wideCharBuf = allocatedArray = (wchar_t*) manager->allocate
            (
                (len + 1) * sizeof(wchar_t)
            );//new wchar_t[len + 1];
        else
            wideCharBuf = tmpWideCharArr;

        ::mbstowcs(wideCharBuf, toTranscode, len);
        retVal = (XMLCh*) manager->allocate((len + 1) *sizeof(XMLCh));//new XMLCh[len + 1];
        for (unsigned int i = 0; i < len; i++)
        {
            retVal[i] = (XMLCh) wideCharBuf[i];
        }
        retVal[len] = 0x00;
        manager->deallocate(allocatedArray);//delete [] allocatedArray;
    }
    else
    {
        retVal = (XMLCh*) manager->allocate(sizeof(XMLCh));//new XMLCh[1];
        retVal[0] = 0;
    }
    return retVal;
}


bool IconvLCPTranscoder::transcode( const   char* const     toTranscode
                                    ,       XMLCh* const    toFill
                                    , const unsigned int    maxChars
                                    , MemoryManager* const  manager)
{
    // Check for a couple of psycho corner cases
    if (!toTranscode || !maxChars)
    {
        toFill[0] = 0;
        return true;
    }

    if (!*toTranscode)
    {
        toFill[0] = 0;
        return true;
    }

    unsigned int len = calcRequiredSize(toTranscode);
    wchar_t       tmpWideCharArr[gTempBuffArraySize];
    wchar_t*      allocatedArray = 0;
    wchar_t*      wideCharBuf = 0;

    if (len > maxChars) {
        len = maxChars;
    }

    if (maxChars >= gTempBuffArraySize)
        wideCharBuf = allocatedArray = (wchar_t*) manager->allocate
        (
            (maxChars + 1) * sizeof(wchar_t)
        );//new wchar_t[maxChars + 1];
    else
        wideCharBuf = tmpWideCharArr;

    if (::mbstowcs(wideCharBuf, toTranscode, maxChars) == -1)
    {
        manager->deallocate(allocatedArray);//delete [] allocatedArray;
        return false;
    }

    for (unsigned int i = 0; i < len; i++)
    {
        toFill[i] = (XMLCh) wideCharBuf[i];
    }
    toFill[len] = 0x00;
    manager->deallocate(allocatedArray);//delete [] allocatedArray;
    return true;
}



// ---------------------------------------------------------------------------
//  IconvLCPTranscoder: Constructors and Destructor
// ---------------------------------------------------------------------------
IconvLCPTranscoder::IconvLCPTranscoder()
{
}

IconvLCPTranscoder::~IconvLCPTranscoder()
{
}

XERCES_CPP_NAMESPACE_END