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