source: trip-planner-front/node_modules/esbuild-wasm/wasm_exec.js@ 6c1585f

Last change on this file since 6c1585f was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit
  • Property mode set to 100644
File size: 18.8 KB
Line 
1// Copyright 2018 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5(() => {
6 // Map multiple JavaScript environments to a single common API,
7 // preferring web standards over Node.js API.
8 //
9 // Environments considered:
10 // - Browsers
11 // - Node.js
12 // - Electron
13 // - Parcel
14 // - Webpack
15
16 if (typeof global !== "undefined") {
17 // global already exists
18 } else if (typeof window !== "undefined") {
19 window.global = window;
20 } else if (typeof self !== "undefined") {
21 self.global = self;
22 } else {
23 throw new Error("cannot export Go (neither global, window nor self is defined)");
24 }
25
26 if (!global.require && typeof require !== "undefined") {
27 global.require = require;
28 }
29
30 if (!global.fs && global.require) {
31 const fs = require("fs");
32 if (typeof fs === "object" && fs !== null && Object.keys(fs).length !== 0) {
33
34 global.fs = Object.assign({}, fs, {
35 // Hack around a Unicode bug in node: https://github.com/nodejs/node/issues/24550
36 write(fd, buf, offset, length, position, callback) {
37 if (offset === 0 && length === buf.length && position === null) {
38 if (fd === process.stdout.fd) {
39 try {
40 process.stdout.write(buf, err => err ? callback(err, 0, null) : callback(null, length, buf));
41 } catch (err) {
42 callback(err, 0, null);
43 }
44 return;
45 }
46 if (fd === process.stderr.fd) {
47 try {
48 process.stderr.write(buf, err => err ? callback(err, 0, null) : callback(null, length, buf));
49 } catch (err) {
50 callback(err, 0, null);
51 }
52 return;
53 }
54 }
55 fs.write(fd, buf, offset, length, position, callback);
56 },
57 });
58
59 }
60 }
61
62 const enosys = () => {
63 const err = new Error("not implemented");
64 err.code = "ENOSYS";
65 return err;
66 };
67
68 if (!global.fs) {
69 let outputBuf = "";
70 global.fs = {
71 constants: { O_WRONLY: -1, O_RDWR: -1, O_CREAT: -1, O_TRUNC: -1, O_APPEND: -1, O_EXCL: -1 }, // unused
72 writeSync(fd, buf) {
73 outputBuf += decoder.decode(buf);
74 const nl = outputBuf.lastIndexOf("\n");
75 if (nl != -1) {
76 console.log(outputBuf.substr(0, nl));
77 outputBuf = outputBuf.substr(nl + 1);
78 }
79 return buf.length;
80 },
81 write(fd, buf, offset, length, position, callback) {
82 if (offset !== 0 || length !== buf.length || position !== null) {
83 callback(enosys());
84 return;
85 }
86 const n = this.writeSync(fd, buf);
87 callback(null, n);
88 },
89 chmod(path, mode, callback) { callback(enosys()); },
90 chown(path, uid, gid, callback) { callback(enosys()); },
91 close(fd, callback) { callback(enosys()); },
92 fchmod(fd, mode, callback) { callback(enosys()); },
93 fchown(fd, uid, gid, callback) { callback(enosys()); },
94 fstat(fd, callback) { callback(enosys()); },
95 fsync(fd, callback) { callback(null); },
96 ftruncate(fd, length, callback) { callback(enosys()); },
97 lchown(path, uid, gid, callback) { callback(enosys()); },
98 link(path, link, callback) { callback(enosys()); },
99 lstat(path, callback) { callback(enosys()); },
100 mkdir(path, perm, callback) { callback(enosys()); },
101 open(path, flags, mode, callback) { callback(enosys()); },
102 read(fd, buffer, offset, length, position, callback) { callback(enosys()); },
103 readdir(path, callback) { callback(enosys()); },
104 readlink(path, callback) { callback(enosys()); },
105 rename(from, to, callback) { callback(enosys()); },
106 rmdir(path, callback) { callback(enosys()); },
107 stat(path, callback) { callback(enosys()); },
108 symlink(path, link, callback) { callback(enosys()); },
109 truncate(path, length, callback) { callback(enosys()); },
110 unlink(path, callback) { callback(enosys()); },
111 utimes(path, atime, mtime, callback) { callback(enosys()); },
112 };
113 }
114
115 if (!global.process) {
116 global.process = {
117 getuid() { return -1; },
118 getgid() { return -1; },
119 geteuid() { return -1; },
120 getegid() { return -1; },
121 getgroups() { throw enosys(); },
122 pid: -1,
123 ppid: -1,
124 umask() { throw enosys(); },
125 cwd() { throw enosys(); },
126 chdir() { throw enosys(); },
127 }
128 }
129
130 if (!global.crypto && global.require) {
131 const nodeCrypto = require("crypto");
132 global.crypto = {
133 getRandomValues(b) {
134 nodeCrypto.randomFillSync(b);
135 },
136 };
137 }
138 if (!global.crypto) {
139 throw new Error("global.crypto is not available, polyfill required (getRandomValues only)");
140 }
141
142 if (!global.performance) {
143 global.performance = {
144 now() {
145 const [sec, nsec] = process.hrtime();
146 return sec * 1000 + nsec / 1000000;
147 },
148 };
149 }
150
151 if (!global.TextEncoder && global.require) {
152 global.TextEncoder = require("util").TextEncoder;
153 }
154 if (!global.TextEncoder) {
155 throw new Error("global.TextEncoder is not available, polyfill required");
156 }
157
158 if (!global.TextDecoder && global.require) {
159 global.TextDecoder = require("util").TextDecoder;
160 }
161 if (!global.TextDecoder) {
162 throw new Error("global.TextDecoder is not available, polyfill required");
163 }
164
165 // End of polyfills for common API.
166
167 const encoder = new TextEncoder("utf-8");
168 const decoder = new TextDecoder("utf-8");
169
170 global.Go = class {
171 constructor() {
172 this.argv = ["js"];
173 this.env = {};
174 this.exit = (code) => {
175 if (code !== 0) {
176 console.warn("exit code:", code);
177 }
178 };
179 this._exitPromise = new Promise((resolve) => {
180 this._resolveExitPromise = resolve;
181 });
182 this._pendingEvent = null;
183 this._scheduledTimeouts = new Map();
184 this._nextCallbackTimeoutID = 1;
185
186 const setInt64 = (addr, v) => {
187 this.mem.setUint32(addr + 0, v, true);
188 this.mem.setUint32(addr + 4, Math.floor(v / 4294967296), true);
189 }
190
191 const getInt64 = (addr) => {
192 const low = this.mem.getUint32(addr + 0, true);
193 const high = this.mem.getInt32(addr + 4, true);
194 return low + high * 4294967296;
195 }
196
197 const loadValue = (addr) => {
198 const f = this.mem.getFloat64(addr, true);
199 if (f === 0) {
200 return undefined;
201 }
202 if (!isNaN(f)) {
203 return f;
204 }
205
206 const id = this.mem.getUint32(addr, true);
207 return this._values[id];
208 }
209
210 const storeValue = (addr, v) => {
211 const nanHead = 0x7FF80000;
212
213 if (typeof v === "number" && v !== 0) {
214 if (isNaN(v)) {
215 this.mem.setUint32(addr + 4, nanHead, true);
216 this.mem.setUint32(addr, 0, true);
217 return;
218 }
219 this.mem.setFloat64(addr, v, true);
220 return;
221 }
222
223 if (v === undefined) {
224 this.mem.setFloat64(addr, 0, true);
225 return;
226 }
227
228 let id = this._ids.get(v);
229 if (id === undefined) {
230 id = this._idPool.pop();
231 if (id === undefined) {
232 id = this._values.length;
233 }
234 this._values[id] = v;
235 this._goRefCounts[id] = 0;
236 this._ids.set(v, id);
237 }
238 this._goRefCounts[id]++;
239 let typeFlag = 0;
240 switch (typeof v) {
241 case "object":
242 if (v !== null) {
243 typeFlag = 1;
244 }
245 break;
246 case "string":
247 typeFlag = 2;
248 break;
249 case "symbol":
250 typeFlag = 3;
251 break;
252 case "function":
253 typeFlag = 4;
254 break;
255 }
256 this.mem.setUint32(addr + 4, nanHead | typeFlag, true);
257 this.mem.setUint32(addr, id, true);
258 }
259
260 const loadSlice = (addr) => {
261 const array = getInt64(addr + 0);
262 const len = getInt64(addr + 8);
263 return new Uint8Array(this._inst.exports.mem.buffer, array, len);
264 }
265
266 const loadSliceOfValues = (addr) => {
267 const array = getInt64(addr + 0);
268 const len = getInt64(addr + 8);
269 const a = new Array(len);
270 for (let i = 0; i < len; i++) {
271 a[i] = loadValue(array + i * 8);
272 }
273 return a;
274 }
275
276 const loadString = (addr) => {
277 const saddr = getInt64(addr + 0);
278 const len = getInt64(addr + 8);
279 return decoder.decode(new DataView(this._inst.exports.mem.buffer, saddr, len));
280 }
281
282 const timeOrigin = Date.now() - performance.now();
283 this.importObject = {
284 go: {
285 // Go's SP does not change as long as no Go code is running. Some operations (e.g. calls, getters and setters)
286 // may synchronously trigger a Go event handler. This makes Go code get executed in the middle of the imported
287 // function. A goroutine can switch to a new stack if the current stack is too small (see morestack function).
288 // This changes the SP, thus we have to update the SP used by the imported function.
289
290 // func wasmExit(code int32)
291 "runtime.wasmExit": (sp) => {
292 sp >>>= 0;
293 const code = this.mem.getInt32(sp + 8, true);
294 this.exited = true;
295 delete this._inst;
296 delete this._values;
297 delete this._goRefCounts;
298 delete this._ids;
299 delete this._idPool;
300 this.exit(code);
301 },
302
303 // func wasmWrite(fd uintptr, p unsafe.Pointer, n int32)
304 "runtime.wasmWrite": (sp) => {
305 sp >>>= 0;
306 const fd = getInt64(sp + 8);
307 const p = getInt64(sp + 16);
308 const n = this.mem.getInt32(sp + 24, true);
309 fs.writeSync(fd, new Uint8Array(this._inst.exports.mem.buffer, p, n));
310 },
311
312 // func resetMemoryDataView()
313 "runtime.resetMemoryDataView": (sp) => {
314 sp >>>= 0;
315 this.mem = new DataView(this._inst.exports.mem.buffer);
316 },
317
318 // func nanotime1() int64
319 "runtime.nanotime1": (sp) => {
320 sp >>>= 0;
321 setInt64(sp + 8, (timeOrigin + performance.now()) * 1000000);
322 },
323
324 // func walltime() (sec int64, nsec int32)
325 "runtime.walltime": (sp) => {
326 sp >>>= 0;
327 const msec = (new Date).getTime();
328 setInt64(sp + 8, msec / 1000);
329 this.mem.setInt32(sp + 16, (msec % 1000) * 1000000, true);
330 },
331
332 // func scheduleTimeoutEvent(delay int64) int32
333 "runtime.scheduleTimeoutEvent": (sp) => {
334 sp >>>= 0;
335 const id = this._nextCallbackTimeoutID;
336 this._nextCallbackTimeoutID++;
337 this._scheduledTimeouts.set(id, setTimeout(
338 () => {
339 this._resume();
340 while (this._scheduledTimeouts.has(id)) {
341 // for some reason Go failed to register the timeout event, log and try again
342 // (temporary workaround for https://github.com/golang/go/issues/28975)
343 console.warn("scheduleTimeoutEvent: missed timeout event");
344 this._resume();
345 }
346 },
347 getInt64(sp + 8) + 1, // setTimeout has been seen to fire up to 1 millisecond early
348 ));
349 this.mem.setInt32(sp + 16, id, true);
350 },
351
352 // func clearTimeoutEvent(id int32)
353 "runtime.clearTimeoutEvent": (sp) => {
354 sp >>>= 0;
355 const id = this.mem.getInt32(sp + 8, true);
356 clearTimeout(this._scheduledTimeouts.get(id));
357 this._scheduledTimeouts.delete(id);
358 },
359
360 // func getRandomData(r []byte)
361 "runtime.getRandomData": (sp) => {
362 sp >>>= 0;
363 crypto.getRandomValues(loadSlice(sp + 8));
364 },
365
366 // func finalizeRef(v ref)
367 "syscall/js.finalizeRef": (sp) => {
368 sp >>>= 0;
369 const id = this.mem.getUint32(sp + 8, true);
370 this._goRefCounts[id]--;
371 if (this._goRefCounts[id] === 0) {
372 const v = this._values[id];
373 this._values[id] = null;
374 this._ids.delete(v);
375 this._idPool.push(id);
376 }
377 },
378
379 // func stringVal(value string) ref
380 "syscall/js.stringVal": (sp) => {
381 sp >>>= 0;
382 storeValue(sp + 24, loadString(sp + 8));
383 },
384
385 // func valueGet(v ref, p string) ref
386 "syscall/js.valueGet": (sp) => {
387 sp >>>= 0;
388 const result = Reflect.get(loadValue(sp + 8), loadString(sp + 16));
389 sp = this._inst.exports.getsp() >>> 0; // see comment above
390 storeValue(sp + 32, result);
391 },
392
393 // func valueSet(v ref, p string, x ref)
394 "syscall/js.valueSet": (sp) => {
395 sp >>>= 0;
396 Reflect.set(loadValue(sp + 8), loadString(sp + 16), loadValue(sp + 32));
397 },
398
399 // func valueDelete(v ref, p string)
400 "syscall/js.valueDelete": (sp) => {
401 sp >>>= 0;
402 Reflect.deleteProperty(loadValue(sp + 8), loadString(sp + 16));
403 },
404
405 // func valueIndex(v ref, i int) ref
406 "syscall/js.valueIndex": (sp) => {
407 sp >>>= 0;
408 storeValue(sp + 24, Reflect.get(loadValue(sp + 8), getInt64(sp + 16)));
409 },
410
411 // valueSetIndex(v ref, i int, x ref)
412 "syscall/js.valueSetIndex": (sp) => {
413 sp >>>= 0;
414 Reflect.set(loadValue(sp + 8), getInt64(sp + 16), loadValue(sp + 24));
415 },
416
417 // func valueCall(v ref, m string, args []ref) (ref, bool)
418 "syscall/js.valueCall": (sp) => {
419 sp >>>= 0;
420 try {
421 const v = loadValue(sp + 8);
422 const m = Reflect.get(v, loadString(sp + 16));
423 const args = loadSliceOfValues(sp + 32);
424 const result = Reflect.apply(m, v, args);
425 sp = this._inst.exports.getsp() >>> 0; // see comment above
426 storeValue(sp + 56, result);
427 this.mem.setUint8(sp + 64, 1);
428 } catch (err) {
429 sp = this._inst.exports.getsp() >>> 0; // see comment above
430 storeValue(sp + 56, err);
431 this.mem.setUint8(sp + 64, 0);
432 }
433 },
434
435 // func valueInvoke(v ref, args []ref) (ref, bool)
436 "syscall/js.valueInvoke": (sp) => {
437 sp >>>= 0;
438 try {
439 const v = loadValue(sp + 8);
440 const args = loadSliceOfValues(sp + 16);
441 const result = Reflect.apply(v, undefined, args);
442 sp = this._inst.exports.getsp() >>> 0; // see comment above
443 storeValue(sp + 40, result);
444 this.mem.setUint8(sp + 48, 1);
445 } catch (err) {
446 sp = this._inst.exports.getsp() >>> 0; // see comment above
447 storeValue(sp + 40, err);
448 this.mem.setUint8(sp + 48, 0);
449 }
450 },
451
452 // func valueNew(v ref, args []ref) (ref, bool)
453 "syscall/js.valueNew": (sp) => {
454 sp >>>= 0;
455 try {
456 const v = loadValue(sp + 8);
457 const args = loadSliceOfValues(sp + 16);
458 const result = Reflect.construct(v, args);
459 sp = this._inst.exports.getsp() >>> 0; // see comment above
460 storeValue(sp + 40, result);
461 this.mem.setUint8(sp + 48, 1);
462 } catch (err) {
463 sp = this._inst.exports.getsp() >>> 0; // see comment above
464 storeValue(sp + 40, err);
465 this.mem.setUint8(sp + 48, 0);
466 }
467 },
468
469 // func valueLength(v ref) int
470 "syscall/js.valueLength": (sp) => {
471 sp >>>= 0;
472 setInt64(sp + 16, parseInt(loadValue(sp + 8).length));
473 },
474
475 // valuePrepareString(v ref) (ref, int)
476 "syscall/js.valuePrepareString": (sp) => {
477 sp >>>= 0;
478 const str = encoder.encode(String(loadValue(sp + 8)));
479 storeValue(sp + 16, str);
480 setInt64(sp + 24, str.length);
481 },
482
483 // valueLoadString(v ref, b []byte)
484 "syscall/js.valueLoadString": (sp) => {
485 sp >>>= 0;
486 const str = loadValue(sp + 8);
487 loadSlice(sp + 16).set(str);
488 },
489
490 // func valueInstanceOf(v ref, t ref) bool
491 "syscall/js.valueInstanceOf": (sp) => {
492 sp >>>= 0;
493 this.mem.setUint8(sp + 24, (loadValue(sp + 8) instanceof loadValue(sp + 16)) ? 1 : 0);
494 },
495
496 // func copyBytesToGo(dst []byte, src ref) (int, bool)
497 "syscall/js.copyBytesToGo": (sp) => {
498 sp >>>= 0;
499 const dst = loadSlice(sp + 8);
500 const src = loadValue(sp + 32);
501 if (!(src instanceof Uint8Array || src instanceof Uint8ClampedArray)) {
502 this.mem.setUint8(sp + 48, 0);
503 return;
504 }
505 const toCopy = src.subarray(0, dst.length);
506 dst.set(toCopy);
507 setInt64(sp + 40, toCopy.length);
508 this.mem.setUint8(sp + 48, 1);
509 },
510
511 // func copyBytesToJS(dst ref, src []byte) (int, bool)
512 "syscall/js.copyBytesToJS": (sp) => {
513 sp >>>= 0;
514 const dst = loadValue(sp + 8);
515 const src = loadSlice(sp + 16);
516 if (!(dst instanceof Uint8Array || dst instanceof Uint8ClampedArray)) {
517 this.mem.setUint8(sp + 48, 0);
518 return;
519 }
520 const toCopy = src.subarray(0, dst.length);
521 dst.set(toCopy);
522 setInt64(sp + 40, toCopy.length);
523 this.mem.setUint8(sp + 48, 1);
524 },
525
526 "debug": (value) => {
527 console.log(value);
528 },
529 }
530 };
531 }
532
533 async run(instance) {
534 if (!(instance instanceof WebAssembly.Instance)) {
535 throw new Error("Go.run: WebAssembly.Instance expected");
536 }
537 this._inst = instance;
538 this.mem = new DataView(this._inst.exports.mem.buffer);
539 this._values = [ // JS values that Go currently has references to, indexed by reference id
540 NaN,
541 0,
542 null,
543 true,
544 false,
545 global,
546 this,
547 ];
548 this._goRefCounts = new Array(this._values.length).fill(Infinity); // number of references that Go has to a JS value, indexed by reference id
549 this._ids = new Map([ // mapping from JS values to reference ids
550 [0, 1],
551 [null, 2],
552 [true, 3],
553 [false, 4],
554 [global, 5],
555 [this, 6],
556 ]);
557 this._idPool = []; // unused ids that have been garbage collected
558 this.exited = false; // whether the Go program has exited
559
560 // Pass command line arguments and environment variables to WebAssembly by writing them to the linear memory.
561 let offset = 4096;
562
563 const strPtr = (str) => {
564 const ptr = offset;
565 const bytes = encoder.encode(str + "\0");
566 new Uint8Array(this.mem.buffer, offset, bytes.length).set(bytes);
567 offset += bytes.length;
568 if (offset % 8 !== 0) {
569 offset += 8 - (offset % 8);
570 }
571 return ptr;
572 };
573
574 const argc = this.argv.length;
575
576 const argvPtrs = [];
577 this.argv.forEach((arg) => {
578 argvPtrs.push(strPtr(arg));
579 });
580 argvPtrs.push(0);
581
582 const keys = Object.keys(this.env).sort();
583 keys.forEach((key) => {
584 argvPtrs.push(strPtr(`${key}=${this.env[key]}`));
585 });
586 argvPtrs.push(0);
587
588 const argv = offset;
589 argvPtrs.forEach((ptr) => {
590 this.mem.setUint32(offset, ptr, true);
591 this.mem.setUint32(offset + 4, 0, true);
592 offset += 8;
593 });
594
595 this._inst.exports.run(argc, argv);
596 if (this.exited) {
597 this._resolveExitPromise();
598 }
599 await this._exitPromise;
600 }
601
602 _resume() {
603 if (this.exited) {
604 throw new Error("Go program has already exited");
605 }
606 this._inst.exports.resume();
607 if (this.exited) {
608 this._resolveExitPromise();
609 }
610 }
611
612 _makeFuncWrapper(id) {
613 const go = this;
614 return function () {
615 const event = { id: id, this: this, args: arguments };
616 go._pendingEvent = event;
617 go._resume();
618 return event.result;
619 };
620 }
621 }
622
623 if (
624 typeof module !== "undefined" &&
625 global.require &&
626 global.require.main === module &&
627 global.process &&
628 global.process.versions &&
629 !global.process.versions.electron
630 ) {
631 if (process.argv.length < 3) {
632 console.error("usage: go_js_wasm_exec [wasm binary] [arguments]");
633 process.exit(1);
634 }
635
636 const go = new Go();
637 go.argv = process.argv.slice(2);
638 go.env = Object.assign({ TMPDIR: require("os").tmpdir() }, process.env);
639 go.exit = process.exit;
640 WebAssembly.instantiate(fs.readFileSync(process.argv[2]), go.importObject).then((result) => {
641 process.on("exit", (code) => { // Node.js exits if no event handler is pending
642 if (code === 0 && !go.exited) {
643 // deadlock, make Go print error and stack traces
644 go._pendingEvent = { id: 0 };
645 go._resume();
646 }
647 });
648 return go.run(result.instance);
649 }).catch((err) => {
650 console.error(err);
651 process.exit(1);
652 });
653 }
654})();
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