Last active
August 29, 2015 14:02
-
-
Save 2bbb/caa147dab8ec66a6c165 to your computer and use it in GitHub Desktop.
HelloWorld.swift
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
// | |
// main.swift | |
// SwiftLine | |
// | |
// Created by ISHII 2bit on 2014/06/03. | |
// Copyright (c) 2014 buffer Renaiss. All rights reserved. | |
// | |
import Foundation | |
protocol InterpretBrainfuck { | |
func stringAtPosition(pos:Int) -> NSString; | |
func interpretAsBrainfuck(); | |
} | |
extension NSString: InterpretBrainfuck { | |
func stringAtPosition(pos:Int) -> NSString { | |
return substringWithRange(NSMakeRange(pos, 1)); | |
} | |
func interpretAsBrainfuck() { | |
var memorySpace:Int[] = [0]; | |
var pointer:Int = 0; | |
var cursor:Int = 0; | |
var loopPosition:Int[] = []; | |
while cursor < length { | |
var x = stringAtPosition(cursor); | |
switch x { | |
case ">": | |
pointer++; | |
if memorySpace.count <= pointer { | |
memorySpace.append(0); | |
} | |
case "<": | |
pointer--; | |
if pointer < 0 { | |
println("Error: Negative Memory Index"); | |
return; | |
} | |
case "+": | |
memorySpace[pointer]++; | |
case "-": | |
memorySpace[pointer]--; | |
case ".": | |
putchar(CInt(memorySpace[pointer])); | |
case ",": | |
memorySpace[pointer] = Int(getchar()); | |
case "[": | |
if(0 == memorySpace[pointer]) { | |
while stringAtPosition(cursor) != "]" { | |
cursor++; | |
} | |
} else { | |
loopPosition.append(cursor); | |
} | |
case "]": | |
if loopPosition.count == 0 { | |
println("Error: Loop Bracket is Unbalance"); | |
return; | |
} | |
cursor = loopPosition[loopPosition.count - 1] - 1; | |
loopPosition.removeLast(); | |
default: | |
0; | |
} | |
cursor++; | |
} | |
} | |
} | |
"+++++++++[>++++++++>+++++++++++>+++++<<<-]>.>++.+++++++..+++.>-.------------.<++++++++.--------.+++.------.--------.>+.".interpretAsBrainfuck(); | |
exit(0); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment