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"use strict";
const test = require('tape');
const fs = require('fs');
const child_process = require('child_process');
const beautify = require('js-beautify').js_beautify;
const tmp = require('tmp');
const DataView = require('buffer-dataview');
const BytecodeParser = require("../src/lundump.js");
const lua_State = require("../src/lstate.js").lua_State;
const LuaVM = require("../src/lvm.js").LuaVM;
const toByteCode = function (luaCode) {
var luaFile = tmp.fileSync(),
bclist;
fs.writeSync(luaFile.fd, luaCode);
child_process.execSync(`luac-5.3 -o ${luaFile.name}.bc ${luaFile.name}`);
child_process.execSync(`luac-5.3 -l ${luaFile.name} > ${luaFile.name}.bc.txt`);
bclist = fs.readFileSync(`${luaFile.name}.bc.txt`, 'utf8');
console.log(bclist);
return {
dataView: new DataView(fs.readFileSync(`${luaFile.name}.bc`)),
bclist: bclist
};
};
const getVM = function (luaCode) {
var bc = toByteCode(luaCode),
dv = bc.dataView,
bcl = bc.bclist;
let p = new BytecodeParser(dv);
let cl = p.luaU_undump();
let L = new lua_State(cl);
return new LuaVM(L);
};
test('LOADK, RETURN', function (t) {
let luaCode = `
local a = "hello world"
return a
`, vm;
t.plan(2);
t.comment("Running following code: \n" + luaCode);
t.doesNotThrow(function () {
vm = getVM(luaCode);
vm.execute();
}, "Program executed without errors");
t.strictEqual(
vm.L.stack[0].value,
"hello world",
"Program output is correct"
);
});
test('MOV', function (t) {
let luaCode = `
local a = "hello world"
local b = a
return b
`, vm;
t.plan(2);
t.comment("Running following code: \n" + luaCode);
t.doesNotThrow(function () {
vm = getVM(luaCode);
vm.execute();
}, "Program executed without errors");
t.strictEqual(
vm.L.stack[0].value,
"hello world",
"Program output is correct"
);
});
test('Binary op', function (t) {
let luaCode = `
local a = 5
local b = 10
return a + b, a - b, a * b, a / b, a % b, a^b, a // b, a & b, a | b, a ~ b, a << b, a >> b
`, vm;
t.plan(2);
t.comment("Running following code: \n" + luaCode);
t.doesNotThrow(function () {
vm = getVM(luaCode);
vm.execute();
}, "Program executed without errors");
t.deepEqual(
vm.L.stack.slice(0, 12).map(function (e) { return e.value; }),
[15, -5, 50, 0.5, 5, 9765625.0, 0, 0, 15, 15, 5120, 0],
"Program output is correct"
);
});
test('Unary op, LOADBOOL', function (t) {
let luaCode = `
local a = 5
local b = false
return -a, not b, ~a
`, vm;
t.plan(2);
t.comment("Running following code: \n" + luaCode);
t.doesNotThrow(function () {
vm = getVM(luaCode);
vm.execute();
}, "Program executed without errors");
t.deepEqual(
vm.L.stack.slice(0, 3).map(function (e) { return e.value; }),
[-5, true, -6],
"Program output is correct"
);
});
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