Delete isbpl.js

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Daniella 2022-03-05 21:09:17 +01:00 committed by GitHub
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@ -1,204 +0,0 @@
#!/bin/node
const fs = require('fs');
const process = require('process');
const stack = [];
const vars = [{}];
const keywords = [
"native",
"func",
"if",
"def",
"stop",
];
let insns;
let die = 0;
const natives = {
"alen": function () {
stack.push(stack.pop().length);
},
"aget": function () {
let idx = stack.pop();
let array = stack.pop();
stack.push(array[idx]);
},
"aput": function () {
let val = stack.pop();
let idx = stack.pop();
let array = stack.pop();
array[idx] = val;
},
"anew": function () {
let length = stack.pop();
let val = stack.pop();
stack.push(Array.apply(val, Array(length));
},
"_char": function () {
stack.push(String.fromCharCode(stack.pop()));
},
"_int": function () {
stack.push(Number(stack.pop()));
},
"_file": function () {
stack.push(String(stack.pop()));
},
"_float": function () {
stack.push(Number(stack.pop()));
},
"_long": function () {
stack.push(Number(stack.pop()));
},
"_double": function () {
stack.push(Number(stack.pop()));
},
"ischar": function () {
let x = stack.pop();
stack.push(x instanceof String && x.length == 1)
},
"isint": function () {
let x = stack.pop();
stack.push(x instanceof Number)
},
"isfloat": function () {
let x = stack.pop();
stack.push(x instanceof Number)
},
"islong": function () {
let x = stack.pop();
stack.push(x instanceof Number)
},
"isdouble": function () {
let x = stack.pop();
stack.push(x instanceof Number)
},
"putchar": function () {
if(x instanceof String && x.length == 1)
process.stdout.write(x);
else
process.stdout.write(Number(x))
process.stdout.flush();
},
"read": function () {
let filename = stack.pop();
stack.push(fs.readFileSync(filename, "iso-8859-1"));
},
"write": function () {
let content = stack.pop();
let filename = stack.pop();
fs.writeFileSync(filename, content, { encoding: "iso-8859-1" });
},
"flength": function () {
let filename = stack.pop();
stack.push(fs.statSync(filename).size);
},
"mktype": function () {
},
"type": function () {
},
"call": function () {
resolve(stack.pop(), 0);
},
"typename": function () {
}
}
function beginBlock(i) {
if(insns[i++] !== "{") {
console.err("Exoected { at " + insns[i] + " at beginning of block!")
process.exit(1);
}
const finsns = [];
let n = 1;
while(n > 0) {
finsns.push(insns[i]);
if(insns[i] === "{") n++;
if(insns[i] === "}") n--;
i++;
}
finsns.pop();
return [
function call () {
for(let j = 0; j < finsns.length; ) {
j = resolve(finsns[j], j);
if(die > 0) {
die--;
return;
}
}
},
i
]
}
function handleKeyword(id, i) {
if(id === "def") {
i++;
vars.peek()[insns[i]] = 0
vars.peek()["=" + insns[i]] = function set() {
vars.peek()[insns[i]] = stack.pop();
};
}
if(id === "native") {
i++;
vars.peek()[insns[i]] = natives[insns[i]];
}
if(id === "if") {
i++;
const block = beginBlock();
if(stack.pop()) {
block[0]();
}
i = block[1];
}
if(id === "func") {
i++;
const block = beginBlock(i);
vars.peek()[insns[i]] = block[0];
i = block[1];
}
if(id === "while") {
i++;
const n = i;
// This is needed to set the insn pointer to the right location after the block
let block;
while((function check() {
while(insns[i] !== "{") {
i = resolve(insns[i], i);
}
i--;
return stack.pop()
})()) {
block = block || beginBlock(i);
block[0]();
i = n;
}
block = block || beginBlock(i);
i = block[1];
}
if(id === "stop") {
die = stack.pop()
}
return i + 1;
}
function resolve(id, i) {
if(keywords.contains(keywords)) {
return handleKeyword(id, i);
}
let toRun = vars.peek()[id] || vars[0][id];
if(!toRun) {
console.err("Could not find keyword " + id + "!");
process.exit(1);
}
else {
toRun();
}
return ++i;
}
for(let i = 0; i < isns.length; ) {
i = resolve(insns[i]);
}