// ---------------------------------------------------------------------------
// ICUTransService: The protected virtual transcoding service API
// ---------------------------------------------------------------------------
XMLTranscoder* ICUTransService::
makeNewXMLTranscoder(const XMLCh* const encodingName
, XMLTransService::Codes& resValue
, const unsigned int blockSize
, MemoryManager* const manager)
{
//
// For encodings that end with "s390" we need to strip off the "s390"
// from the encoding name and add ",swaplfnl" to the encoding name
// that we pass into ICU on the ucnv_openU.
//
XMLCh* encodingNameToUse = (XMLCh*) encodingName;
XMLCh* workBuffer = 0;
if ( (XMLString::endsWith(encodingNameToUse, gs390Id)) ||
(XMLString::endsWith(encodingNameToUse, gS390Id)) )
{
int workBufferSize = (XMLString::stringLen(encodingNameToUse) + XMLString::stringLen(gswaplfnlId) - XMLString::stringLen(gS390Id) + 1);
workBuffer = (XMLCh*) manager->allocate(workBufferSize * sizeof(XMLCh));
int moveSize = XMLString::stringLen(encodingNameToUse) - XMLString::stringLen(gS390Id);
XMLString::moveChars(workBuffer, encodingNameToUse, moveSize);
XMLString::moveChars((workBuffer + moveSize), gswaplfnlId, XMLString::stringLen(gswaplfnlId));
encodingNameToUse = workBuffer;
}
//
// If UChar and XMLCh are not the same size, then we have premassage the
// encoding name into a UChar type string.
//
const UChar* actualName;
UChar* tmpName = 0;
if (sizeof(UChar) == sizeof(XMLCh))
{
actualName = (const UChar*)encodingNameToUse;
}
else
{
tmpName = convertToUChar(encodingNameToUse, 0, manager);
actualName = tmpName;
}
ArrayJanitor<UChar> janTmp(tmpName, manager);
ArrayJanitor<XMLCh> janTmp1(workBuffer, manager);
UErrorCode uerr = U_ZERO_ERROR;
UConverter* converter = ucnv_openU(actualName, &uerr);
if (!converter)
{
resValue = XMLTransService::UnsupportedEncoding;
return 0;
}
return new (manager) ICUTranscoder(encodingName, converter, blockSize, manager);
}
BitmapPNG* LoadPNG(vgui::InputStream& stream)
{
//allocate structures for read
png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr)
return NULL;
png_infop info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
png_destroy_read_struct(&png_ptr,
(png_infopp)NULL, (png_infopp)NULL);
return NULL;
}
//set up our alternate read function
png_set_read_fn(png_ptr,&stream,png_read_vgui_stream);
//read the image
png_read_png(png_ptr,info_ptr,PNG_TRANSFORM_PACKING | PNG_TRANSFORM_STRIP_16,NULL);
png_bytepp rows = png_get_rows(png_ptr, info_ptr);
png_read_image(png_ptr,rows);
//we now have the information in row format, it needs to be converted to a single array
//of 32bit pixel values specified as a uchar* so that we can create the image object
uchar* data = new uchar[info_ptr->width*info_ptr->height*4];
convertToUChar(info_ptr,rows,data);
//create the BitmpPNG that we are going to return
BitmapPNG* returnVal = new BitmapPNG(info_ptr->width,info_ptr->height,data);
//read the information after the image for completeness
png_read_end(png_ptr,NULL);
//free up png structures and other memory we've used
delete[] data;
png_destroy_read_struct(&png_ptr,&info_ptr,(png_infopp)NULL);
return returnVal;
}
unsigned int
ICUTranscoder::transcodeTo( const XMLCh* const srcData
, const unsigned int srcCount
, XMLByte* const toFill
, const unsigned int maxBytes
, unsigned int& charsEaten
, const UnRepOpts options)
{
//
// Get a pointer to the buffer to transcode. If UChar and XMLCh are
// the same size here, then use the original. Else, create a temp
// one and put a janitor on it.
//
const UChar* srcPtr;
UChar* tmpBufPtr = 0;
if (sizeof(XMLCh) == sizeof(UChar))
{
srcPtr = (const UChar*)srcData;
}
else
{
tmpBufPtr = convertToUChar(srcData, srcCount, getMemoryManager());
srcPtr = tmpBufPtr;
}
ArrayJanitor<UChar> janTmpBuf(tmpBufPtr, getMemoryManager());
//
// Set the appropriate callback so that it will either fail or use
// the rep char. Remember the old one so we can put it back.
//
UErrorCode err = U_ZERO_ERROR;
UConverterFromUCallback oldCB = NULL;
#if (U_ICU_VERSION_MAJOR_NUM < 2)
void* orgContent;
#else
const void* orgContent;
#endif
ucnv_setFromUCallBack
(
fConverter
, (options == UnRep_Throw) ? UCNV_FROM_U_CALLBACK_STOP
: UCNV_FROM_U_CALLBACK_SUBSTITUTE
, NULL
, &oldCB
, &orgContent
, &err
);
//
// Ok, lets transcode as many chars as we we can in one shot. The
// ICU API gives enough info not to have to do this one char by char.
//
XMLByte* startTarget = toFill;
const UChar* startSrc = srcPtr;
err = U_ZERO_ERROR;
ucnv_fromUnicode
(
fConverter
, (char**)&startTarget
, (char*)(startTarget + maxBytes)
, &startSrc
, srcPtr + srcCount
, 0
, false
, &err
);
// Rememember the status before we possibly overite the error code
const bool res = (err == U_ZERO_ERROR);
// Put the old handler back
err = U_ZERO_ERROR;
UConverterFromUCallback orgAction = NULL;
ucnv_setFromUCallBack(fConverter, oldCB, NULL, &orgAction, &orgContent, &err);
if (!res)
{
XMLCh tmpBuf[17];
XMLString::binToText((unsigned int)*startSrc, tmpBuf, 16, 16, getMemoryManager());
ThrowXMLwithMemMgr2
(
TranscodingException
, XMLExcepts::Trans_Unrepresentable
, tmpBuf
, getEncodingName()
, getMemoryManager()
);
}
// Fill in the chars we ate from the input
charsEaten = startSrc - srcPtr;
// Return the chars we stored
return startTarget - toFill;
}
