Would Base64Decoder work gracefully with chunking? Looking at below code
which I slapped together from the Wiki example on chunking and with Jeff's
help re EndOfFile (which I just did not see above the screen and only tried
to search for in the Wiki and source code), I have this question: once the
MeterFilter starts slicing and dicing the input, and feeding to the
Base64Decoder, would the later be smart enough to process successfully? It
seems that from every 3 input bytes Base64Decoder has to recover 2 data
bytes. Does it mean that chunk size for this scenario has to be a multiple
of 3?
MeterFilter meter;
StreamTransformationFilter
decryptorFilter((StreamTransformation&)decryptor);
Base64Decoder base64Dec;
FileSource source(sourceStream, false);
FileSink sink(destStream);
source.Attach(new Redirector(decryptorFilter));
if (Base64Encode)
{
decryptorFilter.Attach(new Redirector(base64Dec));
base64Dec.Attach(new Redirector(meter)); // meter
filter feeding base64 decryptor? will this work?
}
else
{
decryptorFilter.Attach(new Redirector(meter));
}
meter.Attach(new Redirector(sink));
word64 processed = 0;
while (!FileUtil::EndOfFile(source) &&
!source.SourceExhausted())
{
source.Pump(ChunkSize); // so hear we would have to
adjust ChunkSize to the nearest greater multiple of 3?
decryptorFilter.Flush(false);
processed += ChunkSize;
if (ProgressCallback != nullptr)
{
if (processed % (ProgressEvery) == 0)
{
ProgressCallback(meter.GetTotalBytes());
}
}
}
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