ZRip - extract the Z code text adventure part of a zblorb file

The Z machine is a virtual machine used by Infocom in the 80's-90's so that they more easily could port their different text adventure games to the many different platforms of the time. The Z machine has its own instruction set called Z code. Some versions of the Z machine support images and sound.
IF-Archive contains many Z-code games playable on a Z machine.
The blorb-format is a format developed to collect the Z code, images and sound that were previously in separate files into one single file. (Btw, blorbs can contain code for other interpreters as well, not just Z code)
This is were ZRip comes in.
Blorbs can contain high resolution sound and images and become quite big and not suitable for machines with limited memory capacity. ZRip reads a blorb-file and tries to extract just the Z code.

Here's the source