netfuck

A multithreaded network enabled brainfuck

Usage: python netfuck.py program.bf

The width of a cell has a minimum of 32 bits signed value.

Commands

• Move cell pointer to the right

• < Move cell pointer to the left
• • Increment value at the current cell
• • Decrement value at the current cell
• , Input a character from stdin and store it in the current cell
• . Output a character to stdin using the current cell value
• [ Jump past the matching ] if the cell under the pointer is 0
• ] Jump back to the matching [ if the cell under the pointer is nonzero

Networking Commands

All operations are asynchronous

• ` Set the port using the value from the current cell
• ~ Connect to an IP address specified in the current cell, the socket handle is stored in the current cell. The port must be set using ` otherwise an error will occur
• = Accept a connection and store the socket handle in the current cell. The port must be set using ` otherwise an error will occur.
• ! Close a connection using the socket handle from the current cell
• ^ Send the current cell value using the socket handle stored from the current cell
• v Receive a value using the socket handle from the current cell and store it in the current cell

Threading Commands

A thread must be green. All threads must run in one operating system thread.

• | Fork, if parent the current cell is 0, else the current cell is 1
• ~ Sleep for n milliseconds

Handling Error

All networking commands return a -1 on error

Endian

IP and port must be specified in network endian order.

Synchronization issues

It has no synchronization issues or whatsoever, since the threads are all executed in a single operating system thread.

TODO

`, ~, =, !, ^, v, |, ~