-
Notifications
You must be signed in to change notification settings - Fork 0
/
bf-compiler.js
65 lines (57 loc) · 1.59 KB
/
bf-compiler.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
module.exports = function(code) {
const prompt = require("prompt-sync")()
let memBand = []
let memIndex = 0
let transpiledCode = []
let indent = 0
code = code.split("")
for(let i = 0; i < 3000; i++) {
memBand.push(0)
}
code.forEach(element => {
let line = []
for(let i = 0; i < indent; i++) {
line.push(" ")
}
switch(element) {
case ">":
line.push("memIndex++")
break
case "<":
line.push("memIndex--")
break
case "+":
line.push("memBand[memIndex]++")
break
case "-":
line.push("memBand[memIndex]--")
break
case "[":
line.push("while(memBand[memIndex] != 0) {")
indent++
break
case "]":
line[line.length - 1] = ""
line.push("}")
indent--
break
case ".":
line.push("process.stdout.write(String.fromCharCode(memBand[memIndex]))")
break
case ",":
line.push("memBand[memIndex] = prompt(\"input>\").charCodeAt(0)")
break
default:
break
}
line = line.join("")
transpiledCode.push(line)
});
transpiledCode = (transpiledCode.join("\n"))
if(indent != 0) {
console.log("Error: loop not closed!")
process.exit(1)
}
eval(transpiledCode)
console.log("")
}