Crestwave / brainbash

A brainfuck interpreter written in pure Bash

brainbash

A brainfuck interpreter written in pure Bash

$ brainbash examples/numwarp.b
123
    /\
     /\
  /\  /
   / 
 \ \/
  \
   

Program Info

• It reads from a file named in the first argument
  • If there are no arguments, it reads from standard input
• It only depends on Bash 4+ and is portable
  • A patch for Bash 3.2+ support is also available
    • It reads from /dev/stdin if there are no arguments
    • It cannot decrement the pointer below zero
• It does not optimize on specific patterns
• Unmatched brackets are detected during runtime

Implementation Info

• Cells wrap on 8-bit overflow and underflow
• The cell is left unchanged on EOF
• Negative pointers are allowed
• Input is line buffered
• Output is ASCII-encoded