Method read

libraries/lib-vst3/memorystream.cpp:81–117

-----------------------------------------------------------------------------

//-----------------------------------------------------------------------------
tresult PLUGIN_API MemoryStream::read (void* data, int32 numBytes, int32* numBytesRead)
{
	if (memory == nullptr)
	{
		if (allocationError)
			return kOutOfMemory;
		numBytes = 0;
	}
	else
	{		
		// Does read exceed size ?
		if (cursor + numBytes > size)
		{
			int32 maxBytes = int32 (size - cursor);

			// Has length become zero or negative ?
			if (maxBytes <= 0) 
			{
				cursor = size;
				numBytes = 0;
			}
			else
				numBytes = maxBytes;
		}
		
		if (numBytes)
		{
			memcpy (data, &memory[cursor], static_cast<size_t> (numBytes));
			cursor += numBytes;
		}
	}

	if (numBytesRead)
		*numBytesRead = numBytes;

	return kResultTrue;
}

//-----------------------------------------------------------------------------
tresult PLUGIN_API MemoryStream::write (void* buffer, int32 numBytes, int32* numBytesWritten)