The current Stream::read (uint8_t* buffer, size_t maxLen) provides a standard implementation for writing a stream to a buffer.
It uses the virtual int method Stream::read() to read the stream byte by byte until no more bytes are available.

However, it calls read() twice in each loop. This results in only every 2nd byte actually being read into the destination buffer, as the read() method will always return the next byte in the stream.
At least that is my understanding of how the read() method of streams is supposed to work.

The lines of code involved: