1349 lines
56 KiB
JavaScript
1349 lines
56 KiB
JavaScript
"use strict";
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var __extends = (this && this.__extends) || (function () {
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var extendStatics = function (d, b) {
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extendStatics = Object.setPrototypeOf ||
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({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
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return extendStatics(d, b);
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};
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return function (d, b) {
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extendStatics(d, b);
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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})();
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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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return new (P || (P = Promise))(function (resolve, reject) {
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function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
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step((generator = generator.apply(thisArg, _arguments || [])).next());
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});
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};
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var __generator = (this && this.__generator) || function (thisArg, body) {
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var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
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return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
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function verb(n) { return function (v) { return step([n, v]); }; }
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function step(op) {
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if (f) throw new TypeError("Generator is already executing.");
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while (_) try {
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if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
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if (y = 0, t) op = [op[0] & 2, t.value];
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switch (op[0]) {
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case 0: case 1: t = op; break;
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case 4: _.label++; return { value: op[1], done: false };
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case 5: _.label++; y = op[1]; op = [0]; continue;
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case 7: op = _.ops.pop(); _.trys.pop(); continue;
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default:
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if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
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if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
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if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
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if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
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if (t[2]) _.ops.pop();
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_.trys.pop(); continue;
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}
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op = body.call(thisArg, _);
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} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
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if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
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}
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};
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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// @TODO:
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// - warn return/revert non-empty, comment ; !assert(+1 @extra)
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// - In JS add config (positionIndependent)
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// - When checking name collisions, verify no collision in javascript
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var path_1 = require("path");
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var vm_1 = __importDefault(require("vm"));
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var ethers_1 = require("ethers");
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var opcodes_1 = require("./opcodes");
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var _parser_1 = require("./_parser");
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var _version_1 = require("./_version");
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var logger = new ethers_1.ethers.utils.Logger(_version_1.version);
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var Guard = {};
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function hexConcat(values) {
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return ethers_1.ethers.utils.hexlify(ethers_1.ethers.utils.concat(values.map(function (v) {
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if (v instanceof opcodes_1.Opcode) {
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return [v.value];
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}
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if (typeof (v) === "number") {
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if (v >= 0 && v <= 255 && !(v % 1)) {
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return ethers_1.ethers.utils.hexlify(v);
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}
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else {
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throw new Error("invalid number: " + v);
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}
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}
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return v;
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})));
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}
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function repeat(char, length) {
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var result = char;
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while (result.length < length) {
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result += result;
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}
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return result.substring(0, length);
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}
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var Script = /** @class */ (function () {
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function Script(filename, callback) {
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ethers_1.ethers.utils.defineReadOnly(this, "filename", filename);
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ethers_1.ethers.utils.defineReadOnly(this, "contextObject", this._baseContext(callback));
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ethers_1.ethers.utils.defineReadOnly(this, "context", vm_1.default.createContext(this.contextObject));
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}
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Script.prototype._baseContext = function (callback) {
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var _this = this;
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return new Proxy({
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__filename: this.filename,
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__dirname: path_1.dirname(this.filename),
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console: console,
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Uint8Array: Uint8Array,
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ethers: ethers_1.ethers,
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utils: ethers_1.ethers.utils,
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BigNumber: ethers_1.ethers.BigNumber,
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arrayify: ethers_1.ethers.utils.arrayify,
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concat: hexConcat,
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hexlify: ethers_1.ethers.utils.hexlify,
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zeroPad: function (value, length) {
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return ethers_1.ethers.utils.hexlify(ethers_1.ethers.utils.zeroPad(value, length));
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},
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id: ethers_1.ethers.utils.id,
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keccak256: ethers_1.ethers.utils.keccak256,
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namehash: ethers_1.ethers.utils.namehash,
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sha256: ethers_1.ethers.utils.sha256,
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parseEther: ethers_1.ethers.utils.parseEther,
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formatEther: ethers_1.ethers.utils.formatEther,
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parseUnits: ethers_1.ethers.utils.parseUnits,
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formatUnits: ethers_1.ethers.utils.formatUnits,
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randomBytes: function (length) {
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return ethers_1.ethers.utils.hexlify(ethers_1.ethers.utils.randomBytes(length));
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},
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toUtf8Bytes: ethers_1.ethers.utils.toUtf8Bytes,
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toUtf8String: ethers_1.ethers.utils.toUtf8String,
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formatBytes32String: ethers_1.ethers.utils.formatBytes32String,
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parseBytes32String: ethers_1.ethers.utils.parseBytes32String,
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Opcode: opcodes_1.Opcode,
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sighash: function (signature) {
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return ethers_1.ethers.utils.id(ethers_1.ethers.utils.FunctionFragment.from(signature).format()).substring(0, 10);
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},
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topichash: function (signature) {
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return ethers_1.ethers.utils.id(ethers_1.ethers.utils.EventFragment.from(signature).format());
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},
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assemble: assemble,
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disassemble: disassemble,
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Error: Error
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}, {
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get: function (obj, key) {
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if (obj[key]) {
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return obj[key];
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}
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if (!callback) {
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return undefined;
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}
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return callback(key, _this._context.context);
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}
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});
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};
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Script.prototype.evaluate = function (code, context) {
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return __awaiter(this, void 0, void 0, function () {
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var script, result;
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return __generator(this, function (_a) {
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switch (_a.label) {
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case 0:
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if (this._context) {
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throw new Error("evaluation collision");
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}
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this._context = { context: context };
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script = new vm_1.default.Script(code, { filename: this.filename });
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result = script.runInContext(this.context);
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if (!(result instanceof Promise)) return [3 /*break*/, 2];
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return [4 /*yield*/, result];
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case 1:
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result = _a.sent();
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_a.label = 2;
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case 2:
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this._context = null;
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return [2 /*return*/, result];
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}
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});
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});
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};
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return Script;
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}());
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var nextTag = 1;
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function throwError(message, location) {
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return logger.throwError(message, "ASSEMBLER", {
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location: location
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});
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}
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var Node = /** @class */ (function () {
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function Node(guard, location, options) {
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var _newTarget = this.constructor;
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if (guard !== Guard) {
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throwError("cannot instantiate class", location);
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}
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logger.checkAbstract(_newTarget, Node);
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ethers_1.ethers.utils.defineReadOnly(this, "location", Object.freeze(location));
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ethers_1.ethers.utils.defineReadOnly(this, "tag", "node-" + nextTag++ + "-" + this.constructor.name);
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for (var key in options) {
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ethers_1.ethers.utils.defineReadOnly(this, key, options[key]);
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}
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}
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// Note: EVERY node must call assemble with `this`, even if only with
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// the bytes "0x" to trigger the offset and bytecode checks
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Node.prototype.assemble = function (assembler, visit) {
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return __awaiter(this, void 0, void 0, function () {
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return __generator(this, function (_a) {
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assembler.start(this);
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visit(this, "0x");
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assembler.end(this);
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return [2 /*return*/];
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});
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});
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};
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Node.prototype.children = function () {
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return [];
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};
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Node.prototype.visit = function (visit) {
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visit(this);
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this.children().forEach(function (child) {
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child.visit(visit);
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});
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};
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Node.from = function (options) {
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var Factories = {
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data: DataNode,
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decimal: LiteralNode,
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eval: EvaluationNode,
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exec: ExecutionNode,
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hex: LiteralNode,
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label: LabelNode,
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length: LinkNode,
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offset: LinkNode,
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opcode: OpcodeNode,
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pop: PopNode,
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scope: ScopeNode,
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};
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var factory = Factories[options.type];
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if (!factory) {
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throwError("unknown type: " + options.type, options.loc);
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}
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return factory.from(options);
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};
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return Node;
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}());
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exports.Node = Node;
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var ValueNode = /** @class */ (function (_super) {
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__extends(ValueNode, _super);
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function ValueNode(guard, location, options) {
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var _newTarget = this.constructor;
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var _this = this;
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logger.checkAbstract(_newTarget, ValueNode);
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_this = _super.call(this, guard, location, options) || this;
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return _this;
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}
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ValueNode.prototype.getPushLiteral = function (value) {
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// Convert value into a hexstring
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var hex = ethers_1.ethers.utils.hexlify(value);
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if (hex === "0x") {
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throwError("invalid literal: 0x", this.location);
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}
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// Make sure it will fit into a push
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var length = ethers_1.ethers.utils.hexDataLength(hex);
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if (length === 0 || length > 32) {
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throwError("literal out of range: " + hex, this.location);
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}
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return hexConcat([opcodes_1.Opcode.from("PUSH" + String(length)), hex]);
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};
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return ValueNode;
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}(Node));
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exports.ValueNode = ValueNode;
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var LiteralNode = /** @class */ (function (_super) {
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__extends(LiteralNode, _super);
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function LiteralNode(guard, location, value, verbatim) {
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return _super.call(this, guard, location, { value: value, verbatim: verbatim }) || this;
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}
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LiteralNode.prototype.assemble = function (assembler, visit) {
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return __awaiter(this, void 0, void 0, function () {
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return __generator(this, function (_a) {
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assembler.start(this);
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if (this.verbatim) {
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if (this.value.substring(0, 2) === "0x") {
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visit(this, this.value);
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}
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else {
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visit(this, ethers_1.ethers.BigNumber.from(this.value).toHexString());
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}
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}
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else {
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visit(this, this.getPushLiteral(ethers_1.ethers.BigNumber.from(this.value)));
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}
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assembler.end(this);
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return [2 /*return*/];
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});
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});
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};
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LiteralNode.from = function (options) {
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if (options.type !== "hex" && options.type !== "decimal") {
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throwError("expected hex or decimal type", options.loc);
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}
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return new LiteralNode(Guard, options.loc, options.value, !!options.verbatim);
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};
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return LiteralNode;
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}(ValueNode));
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exports.LiteralNode = LiteralNode;
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var PopNode = /** @class */ (function (_super) {
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__extends(PopNode, _super);
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function PopNode(guard, location, index) {
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return _super.call(this, guard, location, { index: index }) || this;
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}
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Object.defineProperty(PopNode.prototype, "placeholder", {
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get: function () {
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if (this.index === 0) {
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return "$$";
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}
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return "$" + String(this.index);
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},
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enumerable: true,
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configurable: true
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});
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PopNode.from = function (options) {
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return new PopNode(Guard, options.loc, options.index);
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};
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return PopNode;
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}(ValueNode));
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exports.PopNode = PopNode;
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var LinkNode = /** @class */ (function (_super) {
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__extends(LinkNode, _super);
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function LinkNode(guard, location, type, label) {
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return _super.call(this, guard, location, { type: type, label: label }) || this;
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}
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LinkNode.prototype.assemble = function (assembler, visit) {
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return __awaiter(this, void 0, void 0, function () {
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var value, isOffset, target, result, here, opcodes, literal, w;
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return __generator(this, function (_a) {
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assembler.start(this);
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value = null;
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isOffset = false;
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target = assembler.getTarget(this.label);
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if (target instanceof LabelNode) {
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if (this.type === "offset") {
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value = (assembler.getLinkValue(target, this));
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isOffset = true;
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}
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}
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else {
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result = (assembler.getLinkValue(target, this));
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if (this.type === "offset") {
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value = result.offset;
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isOffset = true;
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}
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else if (this.type === "length") {
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value = result.length;
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}
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}
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if (value == null) {
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throwError("labels can only be targetted as offsets", this.location);
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}
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if (isOffset && assembler.positionIndependentCode) {
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here = assembler.getOffset(this, this);
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opcodes = [];
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if (here > value) {
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literal = "0x";
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for (w = 1; w <= 5; w++) {
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if (w > 4) {
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throwError("jump too large!", this.location);
|
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}
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literal = this.getPushLiteral(here - value + w);
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if (ethers_1.ethers.utils.hexDataLength(literal) <= w) {
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literal = ethers_1.ethers.utils.hexZeroPad(literal, w);
|
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break;
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}
|
|
}
|
|
opcodes.push(literal);
|
|
opcodes.push(opcodes_1.Opcode.from("PC"));
|
|
opcodes.push(opcodes_1.Opcode.from("SUB"));
|
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// This also works, in case the above literal thing doesn't work out...
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//opcodes.push(Opcode.from("PC"));
|
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//opcodes.push(pushLiteral(-delta));
|
|
//opcodes.push(Opcode.from("SWAP1"));
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|
//opcodes.push(Opcode.from("SUB"));
|
|
}
|
|
else {
|
|
// Jump forwards; this is easy to calculate since we can
|
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// do PC firat.
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opcodes.push(opcodes_1.Opcode.from("PC"));
|
|
opcodes.push(this.getPushLiteral(value - here));
|
|
opcodes.push(opcodes_1.Opcode.from("ADD"));
|
|
}
|
|
visit(this, hexConcat(opcodes));
|
|
}
|
|
else {
|
|
visit(this, this.getPushLiteral(value));
|
|
}
|
|
assembler.end(this);
|
|
return [2 /*return*/];
|
|
});
|
|
});
|
|
};
|
|
LinkNode.from = function (options) {
|
|
// @TODO: Verify type is offset or link...
|
|
return new LinkNode(Guard, options.loc, options.type, options.label);
|
|
};
|
|
return LinkNode;
|
|
}(ValueNode));
|
|
exports.LinkNode = LinkNode;
|
|
var OpcodeNode = /** @class */ (function (_super) {
|
|
__extends(OpcodeNode, _super);
|
|
function OpcodeNode(guard, location, opcode, operands, instructional) {
|
|
return _super.call(this, guard, location, { instructional: instructional, opcode: opcode, operands: operands }) || this;
|
|
}
|
|
OpcodeNode.prototype.assemble = function (assembler, visit) {
|
|
return __awaiter(this, void 0, void 0, function () {
|
|
var i;
|
|
return __generator(this, function (_a) {
|
|
switch (_a.label) {
|
|
case 0:
|
|
assembler.start(this);
|
|
i = this.operands.length - 1;
|
|
_a.label = 1;
|
|
case 1:
|
|
if (!(i >= 0)) return [3 /*break*/, 4];
|
|
return [4 /*yield*/, this.operands[i].assemble(assembler, visit)];
|
|
case 2:
|
|
_a.sent();
|
|
_a.label = 3;
|
|
case 3:
|
|
i--;
|
|
return [3 /*break*/, 1];
|
|
case 4:
|
|
// Append this opcode
|
|
visit(this, ethers_1.ethers.utils.hexlify(this.opcode.value));
|
|
assembler.end(this);
|
|
return [2 /*return*/];
|
|
}
|
|
});
|
|
});
|
|
};
|
|
OpcodeNode.prototype.children = function () {
|
|
return this.operands;
|
|
};
|
|
OpcodeNode.prototype.visit = function (visit) {
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|
for (var i = this.operands.length - 1; i >= 0; i--) {
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|
this.operands[i].visit(visit);
|
|
}
|
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visit(this);
|
|
};
|
|
OpcodeNode.from = function (options) {
|
|
if (options.type !== "opcode") {
|
|
throwError("expected opcode type", options.loc);
|
|
}
|
|
var opcode = opcodes_1.Opcode.from(options.mnemonic);
|
|
if (!opcode) {
|
|
throwError("unknown opcode: " + options.mnemonic, options.loc);
|
|
}
|
|
var operands = Object.freeze(options.operands.map(function (o) {
|
|
var operand = Node.from(o);
|
|
if (!(operand instanceof ValueNode)) {
|
|
throwError("bad grammar?!", options.loc);
|
|
}
|
|
return operand;
|
|
}));
|
|
return new OpcodeNode(Guard, options.loc, opcode, operands, !!options.bare);
|
|
};
|
|
return OpcodeNode;
|
|
}(ValueNode));
|
|
exports.OpcodeNode = OpcodeNode;
|
|
var LabelledNode = /** @class */ (function (_super) {
|
|
__extends(LabelledNode, _super);
|
|
function LabelledNode(guard, location, name, values) {
|
|
var _newTarget = this.constructor;
|
|
var _this = this;
|
|
logger.checkAbstract(_newTarget, LabelledNode);
|
|
values = ethers_1.ethers.utils.shallowCopy(values || {});
|
|
values.name = name;
|
|
_this = _super.call(this, guard, location, values) || this;
|
|
return _this;
|
|
}
|
|
return LabelledNode;
|
|
}(Node));
|
|
exports.LabelledNode = LabelledNode;
|
|
var LabelNode = /** @class */ (function (_super) {
|
|
__extends(LabelNode, _super);
|
|
function LabelNode() {
|
|
return _super !== null && _super.apply(this, arguments) || this;
|
|
}
|
|
LabelNode.prototype.assemble = function (assembler, visit) {
|
|
return __awaiter(this, void 0, void 0, function () {
|
|
return __generator(this, function (_a) {
|
|
assembler.start(this);
|
|
visit(this, ethers_1.ethers.utils.hexlify(opcodes_1.Opcode.from("JUMPDEST").value));
|
|
assembler.end(this);
|
|
return [2 /*return*/];
|
|
});
|
|
});
|
|
};
|
|
LabelNode.from = function (options) {
|
|
if (options.type !== "label") {
|
|
throwError("expected label type", options.loc);
|
|
}
|
|
return new LabelNode(Guard, options.loc, options.name);
|
|
};
|
|
return LabelNode;
|
|
}(LabelledNode));
|
|
exports.LabelNode = LabelNode;
|
|
var PaddingNode = /** @class */ (function (_super) {
|
|
__extends(PaddingNode, _super);
|
|
function PaddingNode(guard, location) {
|
|
var _this = _super.call(this, guard, location, {}) || this;
|
|
_this._length = 0;
|
|
return _this;
|
|
}
|
|
PaddingNode.prototype.setLength = function (length) {
|
|
this._length = length;
|
|
};
|
|
PaddingNode.prototype.assemble = function (assembler, visit) {
|
|
return __awaiter(this, void 0, void 0, function () {
|
|
var padding;
|
|
return __generator(this, function (_a) {
|
|
assembler.start(this);
|
|
padding = new Uint8Array(this._length);
|
|
padding.fill(0);
|
|
visit(this, ethers_1.ethers.utils.hexlify(padding));
|
|
assembler.end(this);
|
|
return [2 /*return*/];
|
|
});
|
|
});
|
|
};
|
|
return PaddingNode;
|
|
}(ValueNode));
|
|
exports.PaddingNode = PaddingNode;
|
|
var DataNode = /** @class */ (function (_super) {
|
|
__extends(DataNode, _super);
|
|
function DataNode(guard, location, name, data) {
|
|
var _this = _super.call(this, guard, location, name, { data: data }) || this;
|
|
ethers_1.ethers.utils.defineReadOnly(_this, "padding", new PaddingNode(Guard, _this.location));
|
|
return _this;
|
|
}
|
|
DataNode.prototype.assemble = function (assembler, visit) {
|
|
return __awaiter(this, void 0, void 0, function () {
|
|
var i_1, bytecode, i, opcode;
|
|
return __generator(this, function (_a) {
|
|
switch (_a.label) {
|
|
case 0:
|
|
assembler.start(this);
|
|
// @TODO: This is a problem... We need to visit before visiting children
|
|
// so offsets are correct, but then we cannot pad...
|
|
visit(this, "0x");
|
|
i_1 = 0;
|
|
_a.label = 1;
|
|
case 1:
|
|
if (!(i_1 < this.data.length)) return [3 /*break*/, 4];
|
|
return [4 /*yield*/, this.data[i_1].assemble(assembler, visit)];
|
|
case 2:
|
|
_a.sent();
|
|
_a.label = 3;
|
|
case 3:
|
|
i_1++;
|
|
return [3 /*break*/, 1];
|
|
case 4:
|
|
bytecode = ethers_1.ethers.utils.concat(this.data.map(function (d) { return assembler.getBytecode(d); }));
|
|
i = 0;
|
|
while (i < bytecode.length) {
|
|
opcode = opcodes_1.Opcode.from(bytecode[i++]);
|
|
if (opcode) {
|
|
i += opcode.isPush();
|
|
}
|
|
}
|
|
// The amount we overshot the data by is how much padding we need
|
|
this.padding.setLength(i - bytecode.length);
|
|
return [4 /*yield*/, this.padding.assemble(assembler, visit)];
|
|
case 5:
|
|
_a.sent();
|
|
assembler.end(this);
|
|
return [2 /*return*/];
|
|
}
|
|
});
|
|
});
|
|
};
|
|
DataNode.prototype.children = function () {
|
|
var children = this.data.slice();
|
|
children.push(this.padding);
|
|
return children;
|
|
};
|
|
DataNode.from = function (options) {
|
|
if (options.type !== "data") {
|
|
throwError("expected data type", options.loc);
|
|
}
|
|
return new DataNode(Guard, options.loc, options.name, Object.freeze(options.data.map(function (d) { return Node.from(d); })));
|
|
};
|
|
return DataNode;
|
|
}(LabelledNode));
|
|
exports.DataNode = DataNode;
|
|
var EvaluationNode = /** @class */ (function (_super) {
|
|
__extends(EvaluationNode, _super);
|
|
function EvaluationNode(guard, location, script, verbatim) {
|
|
return _super.call(this, guard, location, { script: script, verbatim: verbatim }) || this;
|
|
}
|
|
EvaluationNode.prototype.assemble = function (assembler, visit) {
|
|
return __awaiter(this, void 0, void 0, function () {
|
|
var result;
|
|
return __generator(this, function (_a) {
|
|
switch (_a.label) {
|
|
case 0:
|
|
assembler.start(this);
|
|
return [4 /*yield*/, assembler.evaluate(this.script, this)];
|
|
case 1:
|
|
result = _a.sent();
|
|
if (this.verbatim) {
|
|
if (typeof (result) === "number") {
|
|
visit(this, ethers_1.ethers.BigNumber.from(result).toHexString());
|
|
}
|
|
else {
|
|
visit(this, ethers_1.ethers.utils.hexlify(result));
|
|
}
|
|
}
|
|
else {
|
|
visit(this, this.getPushLiteral(result));
|
|
}
|
|
assembler.end(this);
|
|
return [2 /*return*/];
|
|
}
|
|
});
|
|
});
|
|
};
|
|
EvaluationNode.from = function (options) {
|
|
if (options.type !== "eval") {
|
|
throwError("expected eval type", options.loc);
|
|
}
|
|
return new EvaluationNode(Guard, options.loc, options.script, !!options.verbatim);
|
|
};
|
|
return EvaluationNode;
|
|
}(ValueNode));
|
|
exports.EvaluationNode = EvaluationNode;
|
|
var ExecutionNode = /** @class */ (function (_super) {
|
|
__extends(ExecutionNode, _super);
|
|
function ExecutionNode(guard, location, script) {
|
|
return _super.call(this, guard, location, { script: script }) || this;
|
|
}
|
|
ExecutionNode.prototype.assemble = function (assembler, visit) {
|
|
return __awaiter(this, void 0, void 0, function () {
|
|
return __generator(this, function (_a) {
|
|
switch (_a.label) {
|
|
case 0:
|
|
assembler.start(this);
|
|
return [4 /*yield*/, assembler.evaluate(this.script, this)];
|
|
case 1:
|
|
_a.sent();
|
|
assembler.end(this);
|
|
return [2 /*return*/];
|
|
}
|
|
});
|
|
});
|
|
};
|
|
ExecutionNode.from = function (options) {
|
|
if (options.type !== "exec") {
|
|
throwError("expected exec type", options.loc);
|
|
}
|
|
return new ExecutionNode(Guard, options.loc, options.script);
|
|
};
|
|
return ExecutionNode;
|
|
}(Node));
|
|
exports.ExecutionNode = ExecutionNode;
|
|
var ScopeNode = /** @class */ (function (_super) {
|
|
__extends(ScopeNode, _super);
|
|
function ScopeNode(guard, location, name, statements) {
|
|
return _super.call(this, guard, location, name, { statements: statements }) || this;
|
|
}
|
|
ScopeNode.prototype.assemble = function (assembler, visit) {
|
|
return __awaiter(this, void 0, void 0, function () {
|
|
var i;
|
|
return __generator(this, function (_a) {
|
|
switch (_a.label) {
|
|
case 0:
|
|
assembler.start(this);
|
|
visit(this, "0x");
|
|
i = 0;
|
|
_a.label = 1;
|
|
case 1:
|
|
if (!(i < this.statements.length)) return [3 /*break*/, 4];
|
|
return [4 /*yield*/, this.statements[i].assemble(assembler, visit)];
|
|
case 2:
|
|
_a.sent();
|
|
_a.label = 3;
|
|
case 3:
|
|
i++;
|
|
return [3 /*break*/, 1];
|
|
case 4:
|
|
assembler.end(this);
|
|
return [2 /*return*/];
|
|
}
|
|
});
|
|
});
|
|
};
|
|
ScopeNode.prototype.children = function () {
|
|
return this.statements;
|
|
};
|
|
ScopeNode.from = function (options) {
|
|
if (options.type !== "scope") {
|
|
throwError("expected scope type", options.loc);
|
|
}
|
|
return new ScopeNode(Guard, options.loc, options.name, Object.freeze(options.statements.map(function (s) { return Node.from(s); })));
|
|
};
|
|
return ScopeNode;
|
|
}(LabelledNode));
|
|
exports.ScopeNode = ScopeNode;
|
|
function disassemble(bytecode) {
|
|
var ops = [];
|
|
var offsets = {};
|
|
var bytes = ethers_1.ethers.utils.arrayify(bytecode, { allowMissingPrefix: true });
|
|
var i = 0;
|
|
var oob = false;
|
|
while (i < bytes.length) {
|
|
var opcode = opcodes_1.Opcode.from(bytes[i]);
|
|
if (!opcode) {
|
|
opcode = new opcodes_1.Opcode("unknown (" + ethers_1.ethers.utils.hexlify(bytes[i]) + ")", bytes[i], 0, 0);
|
|
}
|
|
else if (oob && opcode.mnemonic === "JUMPDEST") {
|
|
opcode = new opcodes_1.Opcode("JUMPDEST (invalid; OOB!!)", bytes[i], 0, 0);
|
|
}
|
|
var op = {
|
|
opcode: opcode,
|
|
offset: i,
|
|
length: 1
|
|
};
|
|
offsets[i] = op;
|
|
ops.push(op);
|
|
i++;
|
|
var push = opcode.isPush();
|
|
if (push) {
|
|
var data = ethers_1.ethers.utils.hexlify(bytes.slice(i, i + push));
|
|
if (ethers_1.ethers.utils.hexDataLength(data) === push) {
|
|
op.pushValue = data;
|
|
op.length += push;
|
|
i += push;
|
|
}
|
|
else {
|
|
oob = true;
|
|
}
|
|
}
|
|
}
|
|
ops.getOperation = function (offset) {
|
|
if (offset >= bytes.length) {
|
|
return {
|
|
opcode: opcodes_1.Opcode.from("STOP"),
|
|
offset: offset,
|
|
length: 1
|
|
};
|
|
}
|
|
return (offsets[offset] || null);
|
|
};
|
|
ops.getByte = function (offset) {
|
|
if (offset >= bytes.length) {
|
|
return 0x00;
|
|
}
|
|
return bytes[offset];
|
|
};
|
|
ops.getBytes = function (offset, length) {
|
|
var result = new Uint8Array(length);
|
|
result.fill(0);
|
|
if (offset < bytes.length) {
|
|
result.set(bytes.slice(offset));
|
|
}
|
|
return ethers_1.ethers.utils.arrayify(result);
|
|
};
|
|
ops.byteLength = bytes.length;
|
|
return ops;
|
|
}
|
|
exports.disassemble = disassemble;
|
|
function formatBytecode(bytecode) {
|
|
var lines = [];
|
|
bytecode.forEach(function (op) {
|
|
var opcode = op.opcode;
|
|
var offset = ethers_1.ethers.utils.hexZeroPad(ethers_1.ethers.utils.hexlify(op.offset), 2);
|
|
if (opcode.isValidJumpDest()) {
|
|
offset += "*";
|
|
}
|
|
else {
|
|
offset += " ";
|
|
}
|
|
var operation = opcode.mnemonic;
|
|
var push = opcode.isPush();
|
|
if (push) {
|
|
if (op.pushValue) {
|
|
operation = op.pushValue + (repeat(" ", 67 - op.pushValue.length) + "; #" + push + " ");
|
|
}
|
|
else {
|
|
operation += repeat(" ", 67 - operation.length) + "; OOB!! ";
|
|
}
|
|
}
|
|
lines.push(offset.substring(2) + ": " + operation);
|
|
});
|
|
return lines.join("\n");
|
|
}
|
|
exports.formatBytecode = formatBytecode;
|
|
var Assembler = /** @class */ (function () {
|
|
function Assembler(root, positionIndependentCode) {
|
|
ethers_1.ethers.utils.defineReadOnly(this, "root", root);
|
|
ethers_1.ethers.utils.defineReadOnly(this, "positionIndependentCode", !!positionIndependentCode);
|
|
var nodes = {};
|
|
var labels = {};
|
|
var parents = {};
|
|
// Link labels to their target node
|
|
root.visit(function (node) {
|
|
nodes[node.tag] = {
|
|
node: node,
|
|
offset: 0x0,
|
|
bytecode: "0x"
|
|
};
|
|
if (node instanceof LabelledNode) {
|
|
// Check for duplicate labels
|
|
if (labels[node.name]) {
|
|
logger.throwError(("duplicate label: " + node.name), ethers_1.ethers.utils.Logger.errors.UNSUPPORTED_OPERATION, {});
|
|
}
|
|
labels[node.name] = node;
|
|
}
|
|
});
|
|
root.visit(function (node) {
|
|
// Check all labels exist
|
|
if (node instanceof LinkNode) {
|
|
var target = labels[node.label];
|
|
if (!target) {
|
|
logger.throwError(("missing label: " + node.label), ethers_1.ethers.utils.Logger.errors.UNSUPPORTED_OPERATION, {});
|
|
}
|
|
}
|
|
// Build the parent structure
|
|
node.children().forEach(function (child) {
|
|
parents[child.tag] = node;
|
|
});
|
|
});
|
|
ethers_1.ethers.utils.defineReadOnly(this, "labels", Object.freeze(labels));
|
|
ethers_1.ethers.utils.defineReadOnly(this, "nodes", Object.freeze(nodes));
|
|
ethers_1.ethers.utils.defineReadOnly(this, "_parents", Object.freeze(parents));
|
|
}
|
|
// Link operations
|
|
Assembler.prototype.getTarget = function (label) {
|
|
return this.labels[label];
|
|
};
|
|
// Evaluate script in the context of a {{! }} or {{= }}
|
|
Assembler.prototype.evaluate = function (script, source) {
|
|
return Promise.resolve(new Uint8Array(0));
|
|
};
|
|
Assembler.prototype.getAncestor = function (node, cls) {
|
|
node = this._parents[node.tag];
|
|
while (node) {
|
|
if (node instanceof cls) {
|
|
return node;
|
|
}
|
|
node = this._parents[node.tag];
|
|
}
|
|
return null;
|
|
};
|
|
Assembler.prototype.getOffset = function (node, source) {
|
|
var offset = this.nodes[node.tag].offset;
|
|
if (source == null) {
|
|
return offset;
|
|
}
|
|
var sourceScope = ((source instanceof ScopeNode) ? source : this.getAncestor(source, ScopeNode));
|
|
return offset - this.nodes[sourceScope.tag].offset;
|
|
};
|
|
Assembler.prototype.setOffset = function (node, offset) {
|
|
this.nodes[node.tag].offset = offset;
|
|
};
|
|
Assembler.prototype.getBytecode = function (node) {
|
|
return this.nodes[node.tag].bytecode;
|
|
};
|
|
Assembler.prototype.setBytecode = function (node, bytecode) {
|
|
this.nodes[node.tag].bytecode = bytecode;
|
|
};
|
|
Assembler.prototype.getLinkValue = function (target, source) {
|
|
var sourceScope = ((source instanceof ScopeNode) ? source : this.getAncestor(source, ScopeNode));
|
|
var targetScope = ((target instanceof ScopeNode) ? target : this.getAncestor(target, ScopeNode));
|
|
if (target instanceof LabelNode) {
|
|
// Label offset (e.g. "@foo:"); accessible only within its direct scope
|
|
//const scope = this.getAncestor(source, Scope);
|
|
if (targetScope !== sourceScope) {
|
|
throwError("cannot access " + target.name + " from " + source.tag, source.location);
|
|
}
|
|
// Return the offset relative to its scope
|
|
return this.nodes[target.tag].offset - this.nodes[targetScope.tag].offset;
|
|
}
|
|
var info = this.nodes[target.tag];
|
|
// Return the offset is relative to its scope
|
|
var bytes = Array.prototype.slice.call(ethers_1.ethers.utils.arrayify(info.bytecode));
|
|
ethers_1.ethers.utils.defineReadOnly(bytes, "ast", target);
|
|
ethers_1.ethers.utils.defineReadOnly(bytes, "source", target.location.source);
|
|
if (!((target instanceof DataNode) || (target instanceof ScopeNode))) {
|
|
throwError("invalid link value lookup", source.location);
|
|
}
|
|
// Check that target is any descendant (or self) of the source scope
|
|
var safeOffset = (sourceScope == targetScope);
|
|
if (!safeOffset) {
|
|
sourceScope.visit(function (node) {
|
|
if (node === targetScope) {
|
|
safeOffset = true;
|
|
}
|
|
});
|
|
}
|
|
// Not safe to access the offset; this will fault if anything tries.
|
|
if (!safeOffset) {
|
|
Object.defineProperty(bytes, "offset", {
|
|
get: function () { throwError("cannot access " + target.name + ".offset from " + source.tag, this.location); }
|
|
});
|
|
ethers_1.ethers.utils.defineReadOnly(bytes, "_freeze", function () { });
|
|
}
|
|
// Add the offset relative to the scope; unless the offset has
|
|
// been marked as invalid, in which case accessing it will fail
|
|
if (safeOffset) {
|
|
bytes.offset = info.offset - this.nodes[sourceScope.tag].offset;
|
|
var frozen_1 = false;
|
|
ethers_1.ethers.utils.defineReadOnly(bytes, "_freeze", function () {
|
|
if (frozen_1) {
|
|
return;
|
|
}
|
|
frozen_1 = true;
|
|
ethers_1.ethers.utils.defineReadOnly(bytes, "offset", bytes.offset);
|
|
});
|
|
}
|
|
return bytes;
|
|
};
|
|
Assembler.prototype.start = function (node) { };
|
|
Assembler.prototype.end = function (node) { };
|
|
return Assembler;
|
|
}());
|
|
var SemanticErrorSeverity;
|
|
(function (SemanticErrorSeverity) {
|
|
SemanticErrorSeverity["error"] = "error";
|
|
SemanticErrorSeverity["warning"] = "warning";
|
|
})(SemanticErrorSeverity = exports.SemanticErrorSeverity || (exports.SemanticErrorSeverity = {}));
|
|
;
|
|
// This Assembler is designed to only check for errors and warnings
|
|
// Warnings
|
|
// - Bare PUSH opcodes
|
|
// - Instructional opcode that has parameters
|
|
// Errors
|
|
// - Using a $$ outside of RPN
|
|
// - Using a $$ when it is not adjacent to the stack
|
|
// - The operand count does not match the opcode
|
|
// - An opcode is used as an operand but does not return a value
|
|
var SemanticChecker = /** @class */ (function (_super) {
|
|
__extends(SemanticChecker, _super);
|
|
function SemanticChecker() {
|
|
return _super !== null && _super.apply(this, arguments) || this;
|
|
}
|
|
SemanticChecker.prototype.check = function () {
|
|
var _this = this;
|
|
var errors = [];
|
|
this.root.visit(function (node) {
|
|
if (node instanceof OpcodeNode) {
|
|
var opcode = node.opcode;
|
|
if (node.instructional) {
|
|
if (opcode.delta) {
|
|
errors.push({
|
|
message: opcode.mnemonic + " used as instructional",
|
|
severity: SemanticErrorSeverity.warning,
|
|
node: node
|
|
});
|
|
}
|
|
}
|
|
else {
|
|
if (opcode.mnemonic === "POP") {
|
|
if (node.operands.length !== 0) {
|
|
errors.push({
|
|
message: "POP expects 0 operands",
|
|
severity: SemanticErrorSeverity.error,
|
|
node: node
|
|
});
|
|
}
|
|
}
|
|
else if (node.operands.length !== opcode.delta) {
|
|
errors.push({
|
|
message: opcode.mnemonic + " expects " + opcode.delta + " operands",
|
|
severity: SemanticErrorSeverity.error,
|
|
node: node
|
|
});
|
|
}
|
|
}
|
|
if (opcode.isPush()) {
|
|
// A stray PUSH operation will gobble up the following code
|
|
// bytes which is bad. But this may be a disassembled program
|
|
// and that PUSH may actually be just some data (which is safe)
|
|
errors.push({
|
|
message: "PUSH opcode modifies program flow - use literals instead",
|
|
severity: SemanticErrorSeverity.warning,
|
|
node: node
|
|
});
|
|
}
|
|
else if (!node.location.statement && opcode.alpha !== 1) {
|
|
// If an opcode does not push anything on the stack, it
|
|
// cannot be used as an operand
|
|
errors.push({
|
|
message: node.opcode.mnemonic + " cannot be an operand",
|
|
severity: SemanticErrorSeverity.error,
|
|
node: node
|
|
});
|
|
}
|
|
}
|
|
if (node.location.statement) {
|
|
if (node instanceof PopNode) {
|
|
// $$ by istelf is useless and is intended to be an operand
|
|
errors.push({
|
|
message: "$$ must be an operand",
|
|
severity: SemanticErrorSeverity.error,
|
|
node: node
|
|
});
|
|
}
|
|
else {
|
|
var scope_1 = _this.getAncestor(node, ScopeNode);
|
|
// Make sure any $$ is stack adjacent (within this scope)
|
|
var ordered_1 = [];
|
|
node.visit(function (node) {
|
|
if (scope_1 !== _this.getAncestor(node, ScopeNode)) {
|
|
return;
|
|
}
|
|
ordered_1.push(node);
|
|
});
|
|
// Allow any number of stack adjacent $$
|
|
var foundZero = null;
|
|
var lastIndex = 0;
|
|
while (ordered_1.length && ordered_1[0] instanceof PopNode) {
|
|
var popNode = (ordered_1.shift());
|
|
var index = popNode.index;
|
|
if (index === 0) {
|
|
foundZero = popNode;
|
|
}
|
|
else if (index !== lastIndex + 1) {
|
|
errors.push({
|
|
message: "out-of-order stack placeholder " + popNode.placeholder + "; expected $$" + (lastIndex + 1),
|
|
severity: SemanticErrorSeverity.error,
|
|
node: popNode
|
|
});
|
|
while (ordered_1.length && ordered_1[0] instanceof PopNode) {
|
|
ordered_1.shift();
|
|
}
|
|
break;
|
|
}
|
|
else {
|
|
lastIndex = index;
|
|
}
|
|
}
|
|
if (foundZero && lastIndex > 0) {
|
|
errors.push({
|
|
message: "cannot mix $$ and $1 stack placeholder",
|
|
severity: SemanticErrorSeverity.error,
|
|
node: foundZero
|
|
});
|
|
}
|
|
// If there are still any buried, we have a problem
|
|
var pops = ordered_1.filter(function (n) { return (n instanceof PopNode); });
|
|
if (pops.length) {
|
|
errors.push({
|
|
message: "stack placeholder " + (pops[0]).placeholder + " must be stack adjacent",
|
|
severity: SemanticErrorSeverity.error,
|
|
node: pops[0]
|
|
});
|
|
}
|
|
}
|
|
}
|
|
});
|
|
return errors;
|
|
};
|
|
return SemanticChecker;
|
|
}(Assembler));
|
|
var CodeGenerationAssembler = /** @class */ (function (_super) {
|
|
__extends(CodeGenerationAssembler, _super);
|
|
function CodeGenerationAssembler(root, options) {
|
|
var _this = _super.call(this, root, !!options.positionIndependentCode) || this;
|
|
ethers_1.ethers.utils.defineReadOnly(_this, "retry", ((options.retry != null) ? options.retry : 512));
|
|
ethers_1.ethers.utils.defineReadOnly(_this, "filename", path_1.resolve(options.filename || "./contract.asm"));
|
|
ethers_1.ethers.utils.defineReadOnly(_this, "defines", Object.freeze(options.defines || {}));
|
|
ethers_1.ethers.utils.defineReadOnly(_this, "_stack", []);
|
|
_this.reset();
|
|
return _this;
|
|
}
|
|
CodeGenerationAssembler.prototype._didChange = function () {
|
|
this._changed = true;
|
|
};
|
|
Object.defineProperty(CodeGenerationAssembler.prototype, "changed", {
|
|
get: function () {
|
|
return this._changed;
|
|
},
|
|
enumerable: true,
|
|
configurable: true
|
|
});
|
|
// Reset the assmebler for another run with updated values
|
|
CodeGenerationAssembler.prototype.reset = function () {
|
|
var _this = this;
|
|
this._changed = false;
|
|
this._objectCache = {};
|
|
this._nextBytecode = {};
|
|
this._script = new Script(this.filename, function (name, context) {
|
|
return _this.get(name, context);
|
|
});
|
|
this._checks = [];
|
|
};
|
|
CodeGenerationAssembler.prototype.evaluate = function (script, source) {
|
|
return this._script.evaluate(script, source);
|
|
};
|
|
CodeGenerationAssembler.prototype._runChecks = function () {
|
|
var _this = this;
|
|
this._checks.forEach(function (func) {
|
|
if (!func()) {
|
|
_this._didChange();
|
|
}
|
|
});
|
|
};
|
|
CodeGenerationAssembler.prototype.getLinkValue = function (target, source) {
|
|
var _this = this;
|
|
// Since we are iteratively generating code, offsets and lengths
|
|
// may not be stable at any given point in time, so if an offset
|
|
// is negative the code is obviously wrong, however we set it to
|
|
// 0 so we can proceed with generation to fill in as many blanks
|
|
// as possible; then we will try assembling again
|
|
var result = _super.prototype.getLinkValue.call(this, target, source);
|
|
if (typeof (result) === "number") {
|
|
if (result < 0) {
|
|
this._checks.push(function () { return false; });
|
|
return 0;
|
|
}
|
|
this._checks.push(function () {
|
|
return (_super.prototype.getLinkValue.call(_this, target, source) === result);
|
|
});
|
|
return result;
|
|
}
|
|
// The offset cannot be used so is independent
|
|
try {
|
|
if (result.offset < 0) {
|
|
this._checks.push(function () { return false; });
|
|
result.offset = 0;
|
|
//this._didChange();
|
|
}
|
|
else {
|
|
this._checks.push(function () {
|
|
var check = _super.prototype.getLinkValue.call(_this, target, source);
|
|
if (check.offset === result.offset && ethers_1.ethers.utils.hexlify(check) === ethers_1.ethers.utils.hexlify(result)) {
|
|
return true;
|
|
}
|
|
return false;
|
|
});
|
|
}
|
|
}
|
|
catch (error) {
|
|
this._checks.push(function () {
|
|
var check = _super.prototype.getLinkValue.call(_this, target, source);
|
|
return (ethers_1.ethers.utils.hexlify(check) === ethers_1.ethers.utils.hexlify(result));
|
|
});
|
|
}
|
|
return result;
|
|
};
|
|
CodeGenerationAssembler.prototype.start = function (node) {
|
|
this._stack.push(node);
|
|
//this._oldBytecode[node.tag] = this.getBytecode(node);
|
|
//this.setBytecode(node, "0x");
|
|
this._nextBytecode[node.tag] = "0x";
|
|
};
|
|
CodeGenerationAssembler.prototype.end = function (node) {
|
|
var _this = this;
|
|
if (this._stack.pop() !== node) {
|
|
throwError("missing push/pop pair", node.location);
|
|
}
|
|
var oldBytecode = this.getBytecode(node);
|
|
this.setBytecode(node, this._nextBytecode[node.tag]);
|
|
if (!(node instanceof PaddingNode)) {
|
|
this._checks.push(function () {
|
|
return (oldBytecode === _this.getBytecode(node));
|
|
});
|
|
}
|
|
};
|
|
// This is used by evaluate to access properties in JavaScript
|
|
// - "defines" allow meta-programming values to be used
|
|
// - jump destinations are available as numbers
|
|
// - bytecode and data are available as an immuatble DataSource
|
|
CodeGenerationAssembler.prototype.get = function (name, source) {
|
|
if (name === "defines") {
|
|
return this.defines;
|
|
}
|
|
else if (name === "_ok") {
|
|
this._runChecks();
|
|
return !this._didChange;
|
|
}
|
|
var node = this.labels[name];
|
|
if (!node) {
|
|
return undefined;
|
|
}
|
|
// We cache objects when they are generated so all nodes
|
|
// receive consistent data; if there is a change we will
|
|
// run the entire assembly process again with the updated
|
|
// values
|
|
if (this._objectCache[node.tag] == null) {
|
|
var result = this.getLinkValue(node, source);
|
|
if (typeof (result) !== "number") {
|
|
result._freeze();
|
|
}
|
|
this._objectCache[node.tag] = result;
|
|
}
|
|
return this._objectCache[node.tag];
|
|
};
|
|
CodeGenerationAssembler.prototype._assemble = function () {
|
|
return __awaiter(this, void 0, void 0, function () {
|
|
var offset;
|
|
var _this = this;
|
|
return __generator(this, function (_a) {
|
|
switch (_a.label) {
|
|
case 0:
|
|
offset = 0;
|
|
return [4 /*yield*/, this.root.assemble(this, function (node, bytecode) {
|
|
// Things have moved; we will need to try again
|
|
if (_this.getOffset(node) !== offset) {
|
|
_this.setOffset(node, offset);
|
|
//this._didChange();
|
|
_this._checks.push(function () { return false; });
|
|
}
|
|
_this._stack.forEach(function (node) {
|
|
_this._nextBytecode[node.tag] = hexConcat([
|
|
_this._nextBytecode[node.tag],
|
|
bytecode
|
|
]);
|
|
});
|
|
offset += ethers_1.ethers.utils.hexDataLength(bytecode);
|
|
})];
|
|
case 1:
|
|
_a.sent();
|
|
this._runChecks();
|
|
return [2 /*return*/];
|
|
}
|
|
});
|
|
});
|
|
};
|
|
CodeGenerationAssembler.prototype.assemble = function (label) {
|
|
return __awaiter(this, void 0, void 0, function () {
|
|
var target, i;
|
|
return __generator(this, function (_a) {
|
|
switch (_a.label) {
|
|
case 0:
|
|
if (label == null) {
|
|
label = "_";
|
|
}
|
|
target = this.getTarget(label);
|
|
if (!target) {
|
|
logger.throwArgumentError("unknown labelled target: " + label, "label", label);
|
|
}
|
|
else if (!(target instanceof ScopeNode || target instanceof DataNode)) {
|
|
logger.throwArgumentError("cannot assemble a bodyless label: " + label, "label", label);
|
|
}
|
|
// Continue re-evaluating the bytecode until a stable set of
|
|
// offsets, length and values are reached.
|
|
return [4 /*yield*/, this._assemble()];
|
|
case 1:
|
|
// Continue re-evaluating the bytecode until a stable set of
|
|
// offsets, length and values are reached.
|
|
_a.sent();
|
|
i = 0;
|
|
_a.label = 2;
|
|
case 2:
|
|
if (!(i < this.retry)) return [3 /*break*/, 5];
|
|
// Regenerate the code with the updated assembler values
|
|
this.reset();
|
|
return [4 /*yield*/, this._assemble()];
|
|
case 3:
|
|
_a.sent();
|
|
// Generated bytecode is stable!! :)
|
|
if (!this.changed) {
|
|
// This should not happen; something is wrong with the grammar
|
|
// or missing enter/exit call in assemble
|
|
if (this._stack.length !== 0) {
|
|
throwError("Bad AST! Bad grammar?!", null);
|
|
}
|
|
//console.log(`Assembled in ${ i } attempts`);
|
|
return [2 /*return*/, this.getBytecode(target)];
|
|
}
|
|
_a.label = 4;
|
|
case 4:
|
|
i++;
|
|
return [3 /*break*/, 2];
|
|
case 5: return [2 /*return*/, logger.throwError("unable to assemble; " + this.retry + " attempts failed to generate stable bytecode", ethers_1.ethers.utils.Logger.errors.UNKNOWN_ERROR, {})];
|
|
}
|
|
});
|
|
});
|
|
};
|
|
return CodeGenerationAssembler;
|
|
}(Assembler));
|
|
function parse(code, options) {
|
|
if (options == null) {
|
|
options = {};
|
|
}
|
|
// Since jison allows \n, \r or \r\n line endings, we need some
|
|
// twekaing to get the correct position
|
|
var lines = [];
|
|
var offset = 0;
|
|
code.split(/(\r\n?|\n)/g).forEach(function (clump, index) {
|
|
if (index % 2) {
|
|
lines[lines.length - 1].line += clump;
|
|
}
|
|
else {
|
|
lines.push({ line: clump, offset: offset });
|
|
}
|
|
offset += clump.length;
|
|
});
|
|
// Add a mock-EOF to the end of the file so we don't out-of-bounds
|
|
// on the last character
|
|
if (lines.length) {
|
|
lines[lines.length - 1].line += "\n";
|
|
}
|
|
// Givens a line (1 offset) and column (0 offset) return the byte offset
|
|
var getOffset = function (line, column) {
|
|
var info = lines[line - 1];
|
|
if (!info || column >= info.line.length) {
|
|
throw new Error("out of range");
|
|
}
|
|
return info.offset + column;
|
|
};
|
|
// We use this in the _parser to convert locations to source
|
|
_parser_1.parser.yy._ethersLocation = function (loc) {
|
|
// The _ scope should call with null to get the full source
|
|
if (loc == null) {
|
|
return {
|
|
offset: 0,
|
|
line: 0,
|
|
length: code.length,
|
|
source: code,
|
|
statement: true
|
|
};
|
|
}
|
|
var offset = getOffset(loc.first_line, loc.first_column);
|
|
var end = getOffset(loc.last_line, loc.last_column);
|
|
return {
|
|
offset: offset,
|
|
line: loc.first_line - 1,
|
|
length: (end - offset),
|
|
source: code.substring(offset, end),
|
|
statement: (!!loc.statement)
|
|
};
|
|
};
|
|
var result = Node.from(_parser_1.parse(code));
|
|
// Nuke the source code lookup callback
|
|
_parser_1.parser.yy._ethersLocation = null;
|
|
// Semantic Checks
|
|
var checker = new SemanticChecker(result);
|
|
var errors = checker.check();
|
|
if (errors.filter(function (e) { return (e.severity === SemanticErrorSeverity.error); }).length || (errors.length && !options.ignoreWarnings)) {
|
|
var error = new Error("semantic errors during parsing");
|
|
error.errors = errors;
|
|
throw error;
|
|
}
|
|
return result;
|
|
}
|
|
exports.parse = parse;
|
|
function assemble(ast, options) {
|
|
return __awaiter(this, void 0, void 0, function () {
|
|
var assembler;
|
|
return __generator(this, function (_a) {
|
|
assembler = new CodeGenerationAssembler(ast, options || {});
|
|
return [2 /*return*/, assembler.assemble(options.target || "_")];
|
|
});
|
|
});
|
|
}
|
|
exports.assemble = assemble;
|
|
//# sourceMappingURL=assembler.js.map
|