When I found the Portable Brainfuck Interpreter by Urban Mueller, who also created the language, it was on Linus Akesson's webpage, totally crushed and minimized. I had just finished writing my own BF interpreter, which was long and very verbose, so I wanted to know how much slimmer this portable version of the interpreter really was.

So what I did here was:

• Expand the original to where it was more readable
• Annotate what was happening in plain language
• Refactor it to make it easier to follow, esp for a C rube like me

I learned a LOT about operator precedence (particular postfix and prefix notation), comma operators, file descriptors, and a few other things. Overall a fun knot to unravel.