Reads a memory stream from the file

self

The instance of self

bytesToRead

How many bytes to read, nil would be everything ahead (:size() - :tell())

[Optional] compressionType

The compression type to use, anything that isn't store or none will have compression enabled

[Optional] compressionLevel

The compression level to use, 0 is terrible compression, 1 is fastest, 6 is balanced, 9 is best compression, if you get an output stream this will be its compression level.

[Optional] compressionHeader

If you want to skip the header, if you do you can't read the file without knowing the compression type

[Optional] isOutputStream

If you want to read the stream as an output stream, this will make it so you can write to the stream and it will write to it

Stream

The stream that was read