befunge

befunge - Befunge-93 Interpreter in JS

This package is available from the npm registry:

npm install befunge
# or
yarn add befunge

Usage

new Befunge(readStream, writeStream[, opts])

const Befunge = require('befunge');

let bef = new Befunge(process.stdin, process.stdout, { wsNoDestroy: true );

Options:

• parsed, Function(Code): pass the parsed source code as an argument to this function whenever it is modified

• position, Function(x, y): pass the xy coordinates of the program cursor to this function whenever it moves

• stack, Function(Stack): pass the stack, as an Array, to this function whenever it is modified

• step, Function(next): will call this function at each step of the program. Resume by calling next(). Useful to set a timeout. Omit this option for continuous run.

• read, Function('int' || 'char'): call this function when needing to read an int or char from the input stream, with a string describing the type

• done, Function: call this function when we encounter @ in the program

• wsNoDestroy, Boolean: don't call .destroy() on the write stream (useful for stdin which will throw an error if we try to close it)

• rsNoDestroy, Boolean: don't call .end() on the read stream

Befunge.load(program): parse and load a Befunge program into memory

bef.load('25*"!olleH",,,,,,,@');

Befunge.run(): run the loaded program

Befunge.reset(): return everything to a beginning state; will reparse from the last loaded program code, empty stack, move cursor to (0, 0), etc.