bool CDatum::DeserializeTextUTF8 (IByteStream &Stream, CDatum *retDatum)
// DeserializeTextUTF8
//
// Loads straight UTF-8 into a single string value.
{
CStringBuffer Buffer;
// See if we have an encoding mark
BYTE BOM[3];
Stream.Read(BOM, sizeof(BOM));
if (BOM[0] == 0xef && BOM[1] == 0xbb && BOM[2] == 0xbf)
; // UTF-8
// Otherwise, not an encoding mark, so write it to the buffer
else
Buffer.Write(BOM, sizeof(BOM));
// Write the rest
Buffer.Write(Stream, Stream.GetStreamLength());
return CreateStringFromHandoff(Buffer, retDatum);
}
bool CDatum::CreateBinary (IByteStream &Stream, int iSize, CDatum *retDatum)
// CreateBinary
//
// Creates a string datum containing binary data from the stream.
// If iSize is -1 then we read as much as the stream has.
// Otherwise we read up to iSize.
{
// LATER: Handle streams more than 2GB. Instead of asking how much space
// is left, maybe we should just ask to truncate the size that we're
// requesting.
int iDataRemaining = Stream.GetStreamLength() - Stream.GetPos();
int iBinarySize = (iSize < 0 ? iDataRemaining : Min(iDataRemaining, iSize));
// 0-size
if (iBinarySize == 0)
{
*retDatum = CDatum();
return true;
}
// Read the stream
CComplexBinary *pBinary;
try
{
pBinary = new CComplexBinary(Stream, iBinarySize);
}
catch (...)
{
return false;
}
// Done
*retDatum = CDatum(pBinary);
// Done
return true;
}