From 997f0f349df44aef196b422ba0002c488e3b5483 Mon Sep 17 00:00:00 2001 From: Felix Kaspar Date: Wed, 15 Nov 2023 00:24:04 +0100 Subject: [PATCH] Wasm working again for node needs testing in browser --- server-node/src/utils/pdf-operations.ts | 4 +- shared-operations/src/functions/impose.ts | 14 +- .../src/wasm/pdfcpu/pdfcpu-wrapper-node.js | 5 +- .../src/wasm/pdfcpu/wasm_exec.js | 16 +- .../src/workflow/traverseOperations.ts | 10 +- shared-operations/wasm/pdfcpu/wasm_exec.js | 875 ++++++++++++++++++ 6 files changed, 903 insertions(+), 21 deletions(-) create mode 100644 shared-operations/wasm/pdfcpu/wasm_exec.js diff --git a/server-node/src/utils/pdf-operations.ts b/server-node/src/utils/pdf-operations.ts index 841fcb73..b1c6756c 100644 --- a/server-node/src/utils/pdf-operations.ts +++ b/server-node/src/utils/pdf-operations.ts @@ -4,10 +4,10 @@ import { ImposeParamsType } from '@stirling-pdf/shared-operations/src/functions/ import { PdfFile } from "@stirling-pdf/shared-operations/src/wrappers/PdfFile"; // Import injected libraries here! -//import * as pdfcpuWrapper from "@stirling-pdf/shared-operations/wasm/pdfcpu/pdfcpu-wrapper-node.js"; +import * as pdfcpuWrapper from "@stirling-pdf/shared-operations/src/wasm/pdfcpu/pdfcpu-wrapper-node.js"; async function impose(params: ImposeParamsType): Promise { - const paramsToUse = { ...params, pdfcpuWrapper: null }; // TODO change null to pdfcpuWrapper + const paramsToUse = { ...params, pdfcpuWrapper: pdfcpuWrapper }; return SharedOperations.impose(paramsToUse); } diff --git a/shared-operations/src/functions/impose.ts b/shared-operations/src/functions/impose.ts index a011ba3b..7c69cc54 100644 --- a/shared-operations/src/functions/impose.ts +++ b/shared-operations/src/functions/impose.ts @@ -1,16 +1,18 @@ +import { PdfFile, RepresentationType } from "../wrappers/PdfFile"; + export type ImposeParamsType = { - file: any; + file: PdfFile; nup: number; format: string; } export type ImposeParamsBaseType = { - file: any; + file: PdfFile; nup: number; format: string; pdfcpuWrapper: any; } -export async function impose(params: ImposeParamsBaseType) { - return await params.pdfcpuWrapper.oneToOne([ +export async function impose(params: ImposeParamsBaseType): Promise { + const result = new PdfFile(params.file.originalFilename, await params.pdfcpuWrapper.oneToOne([ "pdfcpu.wasm", "nup", "-c", @@ -19,5 +21,7 @@ export async function impose(params: ImposeParamsBaseType) { "/output.pdf", String(params.nup), "input.pdf", - ], params.file); + ], await params.file.uint8Array), RepresentationType.Uint8Array, params.file.filename + "_imposed"); + console.log("ImposeResult: ", result); + return result; } \ No newline at end of file diff --git a/shared-operations/src/wasm/pdfcpu/pdfcpu-wrapper-node.js b/shared-operations/src/wasm/pdfcpu/pdfcpu-wrapper-node.js index 6ce3a2e9..2fede912 100644 --- a/shared-operations/src/wasm/pdfcpu/pdfcpu-wrapper-node.js +++ b/shared-operations/src/wasm/pdfcpu/pdfcpu-wrapper-node.js @@ -1,8 +1,7 @@ import { WasmFs } from '@wasmer/wasmfs'; import path from "path"; -let webWasmLocation = "/wasm/"; -let nodeWasmLocation = "./public/wasm/"; +let nodeWasmLocation = "../shared-operations/src/wasm/pdfcpu/"; let fs; const wasmfs = new WasmFs(); @@ -22,7 +21,7 @@ async function configureFs() { } async function loadWasm() { - global.crypto = (await import("crypto")).webcrypto; // wasm dependecy + // global.crypto = (await import("crypto")).webcrypto; // wasm dependecy await import("./wasm_exec.js"); } diff --git a/shared-operations/src/wasm/pdfcpu/wasm_exec.js b/shared-operations/src/wasm/pdfcpu/wasm_exec.js index 0c8a1044..ac33d3f2 100644 --- a/shared-operations/src/wasm/pdfcpu/wasm_exec.js +++ b/shared-operations/src/wasm/pdfcpu/wasm_exec.js @@ -201,14 +201,14 @@ } } - if (!global.crypto && global.require) { - const nodeCrypto = require("crypto"); - global.crypto = { - getRandomValues(b) { - nodeCrypto.randomFillSync(b); - }, - }; - } + // if (!global.crypto && global.require) { + // const nodeCrypto = require("crypto"); + // global.crypto = { + // getRandomValues(b) { + // nodeCrypto.randomFillSync(b); + // }, + // }; + // } if (!global.crypto) { throw new Error("global.crypto is not available, polyfill required (getRandomValues only)"); } diff --git a/shared-operations/src/workflow/traverseOperations.ts b/shared-operations/src/workflow/traverseOperations.ts index ea4de1ef..4821e265 100644 --- a/shared-operations/src/workflow/traverseOperations.ts +++ b/shared-operations/src/workflow/traverseOperations.ts @@ -14,6 +14,7 @@ export async function * traverseOperations(operations: Action[], input: PdfFile[ if(actions === undefined || (Array.isArray(actions) && actions.length == 0)) { // isEmpty console.log("Last Operation"); if(Array.isArray(input)) { + console.log("ArrayOut: ", input); console.log("operation done: " + input[0].filename + (input.length > 1 ? "+" : "")); results = results.concat(input); return; @@ -62,6 +63,7 @@ export async function * traverseOperations(operations: Action[], input: PdfFile[ yield* nToN(input, action, async (input) => { const newPdf = await Operations.impose({file: input, nup: action.values["nup"], format: action.values["format"]}); newPdf.filename += "_imposed"; + console.log("newPDF: ", newPdf); return newPdf; }); break; @@ -158,12 +160,14 @@ export async function * traverseOperations(operations: Action[], input: PdfFile[ } } - async function * nToN(input: PdfFile|PdfFile[], action: Action, callback: (pdf: PdfFile) => Promise): AsyncGenerator { + async function * nToN(input: PdfFile|PdfFile[], action: Action, callback: (pdf: PdfFile) => Promise): AsyncGenerator { if(Array.isArray(input)) { - const nextInputs: PdfFile[] = [] + console.log("inputs", input); + let nextInputs: PdfFile[] = [] for (let i = 0; i < input.length; i++) { - nextInputs.concat(await callback(input[i])); + nextInputs = nextInputs.concat(await callback(input[i])); } + console.log("nextInputs", nextInputs); yield* nextOperation(action.actions, nextInputs); } else { diff --git a/shared-operations/wasm/pdfcpu/wasm_exec.js b/shared-operations/wasm/pdfcpu/wasm_exec.js new file mode 100644 index 00000000..f016a787 --- /dev/null +++ b/shared-operations/wasm/pdfcpu/wasm_exec.js @@ -0,0 +1,875 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. +(() => { + // Map multiple JavaScript environments to a single common API, + // preferring web standards over Node.js API. + // + // Environments considered: + // - Browsers + // - Node.js + // - Electron + // - Parcel + // - Webpack + + console.log("imported") + if (typeof global !== "undefined") { + // global already exists + } else if (typeof window !== "undefined") { + window.global = window; + } else if (typeof self !== "undefined") { + self.global = self; + } else { + throw new Error("cannot export Go (neither global, window nor self is defined)"); + } + + let logFS = false + var handler = { + get: function (target, property) { + if (property in target && target[property] instanceof Function) { + return function () { + if (logFS) { + console.log(property, 'called', arguments); + } + // 将callback替换 + if (arguments[arguments.length - 1] instanceof Function) { + var origCB = arguments[arguments.length - 1]; + var newCB = function () { + if (logFS) { + console.log('callback for', property, 'get called with args:', arguments); + } + return Reflect.apply(origCB, arguments.callee, arguments); + } + arguments[arguments.length - 1] = newCB; + } + return Reflect.apply(target[property], target, arguments); + } + } else { + return target[property] + } + } + } + + if (!global.require && typeof require !== "undefined") { + global.require = require; + } + + + if (!global.fs && global.require) { + + //const fs = require("fs"); + if (typeof fs === "object" && fs !== null && Object.keys(fs).length !== 0) { + global.fs = fs; + } + + } + + const enosys = () => { + const err = new Error("not implemented"); + err.code = "ENOSYS"; + return err; + }; + + if (!global.fs) { + let outputBuf = ""; + global.fs = { + constants: { + O_WRONLY: -1, + O_RDWR: -1, + O_CREAT: -1, + O_TRUNC: -1, + O_APPEND: -1, + O_EXCL: -1 + }, // unused + writeSync(fd, buf) { + outputBuf += decoder.decode(buf); + const nl = outputBuf.lastIndexOf("\n"); + if (nl != -1) { + console.log(outputBuf.substr(0, nl)); + outputBuf = outputBuf.substr(nl + 1); + } + return buf.length; + }, + write(fd, buf, offset, length, position, callback) { + if (offset !== 0 || length !== buf.length || position !== null) { + callback(enosys()); + return; + } + const n = this.writeSync(fd, buf); + callback(null, n); + }, + chmod(path, mode, callback) { + callback(enosys()); + }, + chown(path, uid, gid, callback) { + callback(enosys()); + }, + close(fd, callback) { + callback(enosys()); + }, + fchmod(fd, mode, callback) { + callback(enosys()); + }, + fchown(fd, uid, gid, callback) { + callback(enosys()); + }, + fstat(fd, callback) { + callback(enosys()); + }, + fsync(fd, callback) { + callback(null); + }, + ftruncate(fd, length, callback) { + callback(enosys()); + }, + lchown(path, uid, gid, callback) { + callback(enosys()); + }, + link(path, link, callback) { + callback(enosys()); + }, + lstat(path, callback) { + callback(enosys()); + }, + mkdir(path, perm, callback) { + callback(enosys()); + }, + open(path, flags, mode, callback) { + callback(enosys()); + }, + read(fd, buffer, offset, length, position, callback) { + callback(enosys()); + }, + readdir(path, callback) { + callback(enosys()); + }, + readlink(path, callback) { + callback(enosys()); + }, + rename(from, to, callback) { + callback(enosys()); + }, + rmdir(path, callback) { + callback(enosys()); + }, + stat(path, callback) { + callback(enosys()); + }, + symlink(path, link, callback) { + callback(enosys()); + }, + truncate(path, length, callback) { + callback(enosys()); + }, + unlink(path, callback) { + callback(enosys()); + }, + utimes(path, atime, mtime, callback) { + callback(enosys()); + }, + }; + } + + if (!global.process) { + global.process = { + getuid() { + return -1; + }, + getgid() { + return -1; + }, + geteuid() { + return -1; + }, + getegid() { + return -1; + }, + getgroups() { + throw enosys(); + }, + pid: -1, + ppid: -1, + umask() { + throw enosys(); + }, + cwd() { + throw enosys(); + }, + chdir() { + throw enosys(); + }, + } + } + + // if (!global.crypto && global.require) { + // const nodeCrypto = require("crypto"); + // global.crypto = { + // getRandomValues(b) { + // nodeCrypto.randomFillSync(b); + // }, + // }; + // } + if (!global.crypto) { + throw new Error("global.crypto is not available, polyfill required (getRandomValues only)"); + } + if(!global.crypto.getRandomValues) { + throw new Error("global.crypto.getRandomValues is not available, polyfill required (getRandomValues only)"); + } + + if (!global.performance) { + global.performance = { + now() { + const [sec, nsec] = process.hrtime(); + return sec * 1000 + nsec / 1000000; + }, + }; + } + + if (!global.TextEncoder && global.require) { + global.TextEncoder = require("util").TextEncoder; + } + if (!global.TextEncoder) { + throw new Error("global.TextEncoder is not available, polyfill required"); + } + + if (!global.TextDecoder && global.require) { + global.TextDecoder = require("util").TextDecoder; + } + if (!global.TextDecoder) { + throw new Error("global.TextDecoder is not available, polyfill required"); + } + + + const isNodeJS = global.process && global.process.title === "node"; + + if (!isNodeJS) { + // console.log("ini browser fs") + // var myfs = global.BrowserFS.BFSRequire('fs'); + // global.Buffer = global.BrowserFS.BFSRequire('buffer').Buffer; + // global.fs = myfs; + + global.fs.constants = { + O_RDONLY: 0, + O_WRONLY: 1, + O_RDWR: 2, + O_CREAT: 64, + O_CREATE: 64, + O_EXCL: 128, + O_NOCTTY: 256, + O_TRUNC: 512, + O_APPEND: 1024, + O_DIRECTORY: 65536, + O_NOATIME: 262144, + O_NOFOLLOW: 131072, + O_SYNC: 1052672, + O_DIRECT: 16384, + O_NONBLOCK: 2048, + }; + + let outputBuf = ""; + + global.fs.writeSyncOriginal = global.fs.writeSync + global.fs.writeSync = function (fd, buf) { + if (fd === 1 || fd === 2) { + outputBuf += decoder.decode(buf); + const nl = outputBuf.lastIndexOf("\n"); + if (nl != -1) { + console.log(outputBuf.substr(0, nl)); + outputBuf = outputBuf.substr(nl + 1); + } + return buf.length; + } else { + return global.fs.writeSyncOriginal(...arguments); + } + }; + + global.fs.writeOriginal = global.fs.write + global.fs.write = function (fd, buf, offset, length, position, callback) { + // (corresponding to STDOUT/STDERR) + if (fd === 1 || fd === 2) { + if (offset !== 0 || length !== buf.length || position !== null) { + throw new Error("not implemented"); + } + const n = this.writeSync(fd, buf); + callback(null, n, buf); + } else { + // buf: read buf first + arguments[1] = global.Buffer.from(arguments[1]); + return global.fs.writeOriginal(...arguments); + } + }; + + + + global.fs.openOriginal = global.fs.open + global.fs.open = function (path, flags, mode, callback) { + var myflags = 'r'; + var O = global.fs.constants; + + // Convert numeric flags to string flags + // FIXME: maybe wrong... + console.log("open dir?", path, 'flag', flags, myflags) + if (flags & O.O_WRONLY) { // 'w' + myflags = 'w'; + if (flags & O.O_EXCL) { + myflags = 'wx'; + } + } else if (flags & O.O_RDWR) { // 'r+' or 'w+' + if (flags & O.O_CREAT && flags & O.O_TRUNC) { // w+ + if (flags & O.O_EXCL) { + myflags = 'wx+'; + } else { + myflags = 'w+'; + } + } else { // r+ + myflags = 'r+'; + } + } else if (flags & O.O_APPEND) { // 'a' + console.log("append error") + throw new Error("Not implmented"); + } else { + // 打开文件 + myflags = 'r+'; + console.log("open dir?", path, 'flag', flags, myflags) + } + + + return global.fs.openOriginal(path, myflags, mode, callback); + }; + + global.fs.fstatOriginal = global.fs.fstat; + global.fs.fstat = function (fd, callback) { + return global.fs.fstatOriginal(fd, function () { + var retStat = arguments[1]; + delete retStat['fileData']; + retStat.atimeMs = retStat.atime.getTime(); + retStat.mtimeMs = retStat.mtime.getTime(); + retStat.ctimeMs = retStat.ctime.getTime(); + retStat.birthtimeMs = retStat.birthtime.getTime(); + return callback(arguments[0], retStat); + + }); + }; + + + + global.fs.closeOriginal = global.fs.close; + global.fs.close = function (fd, callback) { + return global.fs.closeOriginal(fd, function () { + if (typeof arguments[0] === 'undefined') arguments[0] = null; + return callback(...arguments); + }); + } + + // global.fs.renameOriginal = global.fs.rename + // global.fs.rename = function (from, to, callback) { + // console.log("rename a0", arguments[0]) + // global.fs.renameOriginal(from, to); + // callback(arguments[0]) + // } + + // global.fs.renameSyncOriginal = global.fs.renameSync + // global.fs.renameSync = function(fd, options) { + // console.log("Sync") + // } + + + global.fs = new Proxy(global.fs, handler); + } + + // End of polyfills for common API. + + const encoder = new TextEncoder("utf-8"); + const decoder = new TextDecoder("utf-8"); + + global.Go = class { + constructor() { + this.argv = ["js"]; + this.env = {}; + this.exit = (code) => { + this.exitCode = code; + if (code !== 0) { + console.warn("exit code:", code); + } + }; + this._exitPromise = new Promise((resolve) => { + this._resolveExitPromise = resolve; + }); + this._pendingEvent = null; + this._scheduledTimeouts = new Map(); + this._nextCallbackTimeoutID = 1; + + const setInt64 = (addr, v) => { + this.mem.setUint32(addr + 0, v, true); + this.mem.setUint32(addr + 4, Math.floor(v / 4294967296), true); + } + + const getInt64 = (addr) => { + const low = this.mem.getUint32(addr + 0, true); + const high = this.mem.getInt32(addr + 4, true); + return low + high * 4294967296; + } + + const loadValue = (addr) => { + const f = this.mem.getFloat64(addr, true); + if (f === 0) { + return undefined; + } + if (!isNaN(f)) { + return f; + } + + const id = this.mem.getUint32(addr, true); + return this._values[id]; + } + + const storeValue = (addr, v) => { + const nanHead = 0x7FF80000; + + if (typeof v === "number" && v !== 0) { + if (isNaN(v)) { + this.mem.setUint32(addr + 4, nanHead, true); + this.mem.setUint32(addr, 0, true); + return; + } + this.mem.setFloat64(addr, v, true); + return; + } + + if (v === undefined) { + this.mem.setFloat64(addr, 0, true); + return; + } + + let id = this._ids.get(v); + if (id === undefined) { + id = this._idPool.pop(); + if (id === undefined) { + id = this._values.length; + } + this._values[id] = v; + this._goRefCounts[id] = 0; + this._ids.set(v, id); + } + this._goRefCounts[id]++; + let typeFlag = 0; + switch (typeof v) { + case "object": + if (v !== null) { + typeFlag = 1; + } + break; + case "string": + typeFlag = 2; + break; + case "symbol": + typeFlag = 3; + break; + case "function": + typeFlag = 4; + break; + } + this.mem.setUint32(addr + 4, nanHead | typeFlag, true); + this.mem.setUint32(addr, id, true); + } + + const loadSlice = (addr) => { + const array = getInt64(addr + 0); + const len = getInt64(addr + 8); + return new Uint8Array(this._inst.exports.mem.buffer, array, len); + } + + const loadSliceOfValues = (addr) => { + const array = getInt64(addr + 0); + const len = getInt64(addr + 8); + const a = new Array(len); + for (let i = 0; i < len; i++) { + a[i] = loadValue(array + i * 8); + } + return a; + } + + const loadString = (addr) => { + const saddr = getInt64(addr + 0); + const len = getInt64(addr + 8); + return decoder.decode(new DataView(this._inst.exports.mem.buffer, saddr, len)); + } + + const timeOrigin = Date.now() - performance.now(); + this.importObject = { + go: { + // Go's SP does not change as long as no Go code is running. Some operations (e.g. calls, getters and setters) + // may synchronously trigger a Go event handler. This makes Go code get executed in the middle of the imported + // function. A goroutine can switch to a new stack if the current stack is too small (see morestack function). + // This changes the SP, thus we have to update the SP used by the imported function. + + // func wasmExit(code int32) + "runtime.wasmExit": (sp) => { + sp >>>= 0; + const code = this.mem.getInt32(sp + 8, true); + this.exited = true; + delete this._inst; + delete this._values; + delete this._goRefCounts; + delete this._ids; + delete this._idPool; + this.exit(code); + }, + + // func wasmWrite(fd uintptr, p unsafe.Pointer, n int32) + "runtime.wasmWrite": (sp) => { + sp >>>= 0; + const fd = getInt64(sp + 8); + const p = getInt64(sp + 16); + const n = this.mem.getInt32(sp + 24, true); + fs.writeSync(fd, new Uint8Array(this._inst.exports.mem.buffer, p, n)); + }, + + // func resetMemoryDataView() + "runtime.resetMemoryDataView": (sp) => { + sp >>>= 0; + this.mem = new DataView(this._inst.exports.mem.buffer); + }, + + // func nanotime1() int64 + "runtime.nanotime1": (sp) => { + sp >>>= 0; + setInt64(sp + 8, (timeOrigin + performance.now()) * 1000000); + }, + + // func walltime1() (sec int64, nsec int32) + "runtime.walltime1": (sp) => { + sp >>>= 0; + const msec = (new Date).getTime(); + setInt64(sp + 8, msec / 1000); + this.mem.setInt32(sp + 16, (msec % 1000) * 1000000, true); + }, + + // func scheduleTimeoutEvent(delay int64) int32 + "runtime.scheduleTimeoutEvent": (sp) => { + sp >>>= 0; + const id = this._nextCallbackTimeoutID; + this._nextCallbackTimeoutID++; + this._scheduledTimeouts.set(id, setTimeout( + () => { + this._resume(); + while (this._scheduledTimeouts.has(id)) { + // for some reason Go failed to register the timeout event, log and try again + // (temporary workaround for https://github.com/golang/go/issues/28975) + console.warn("scheduleTimeoutEvent: missed timeout event"); + this._resume(); + } + }, + getInt64(sp + 8) + 1, // setTimeout has been seen to fire up to 1 millisecond early + )); + this.mem.setInt32(sp + 16, id, true); + }, + + // func clearTimeoutEvent(id int32) + "runtime.clearTimeoutEvent": (sp) => { + sp >>>= 0; + const id = this.mem.getInt32(sp + 8, true); + clearTimeout(this._scheduledTimeouts.get(id)); + this._scheduledTimeouts.delete(id); + }, + + // func getRandomData(r []byte) + "runtime.getRandomData": (sp) => { + sp >>>= 0; + crypto.getRandomValues(loadSlice(sp + 8)); + }, + + // func finalizeRef(v ref) + "syscall/js.finalizeRef": (sp) => { + sp >>>= 0; + const id = this.mem.getUint32(sp + 8, true); + this._goRefCounts[id]--; + if (this._goRefCounts[id] === 0) { + const v = this._values[id]; + this._values[id] = null; + this._ids.delete(v); + this._idPool.push(id); + } + }, + + // func stringVal(value string) ref + "syscall/js.stringVal": (sp) => { + sp >>>= 0; + storeValue(sp + 24, loadString(sp + 8)); + }, + + // func valueGet(v ref, p string) ref + "syscall/js.valueGet": (sp) => { + sp >>>= 0; + const result = Reflect.get(loadValue(sp + 8), loadString(sp + 16)); + sp = this._inst.exports.getsp() >>> 0; // see comment above + storeValue(sp + 32, result); + }, + + // func valueSet(v ref, p string, x ref) + "syscall/js.valueSet": (sp) => { + sp >>>= 0; + Reflect.set(loadValue(sp + 8), loadString(sp + 16), loadValue(sp + 32)); + }, + + // func valueDelete(v ref, p string) + "syscall/js.valueDelete": (sp) => { + sp >>>= 0; + Reflect.deleteProperty(loadValue(sp + 8), loadString(sp + 16)); + }, + + // func valueIndex(v ref, i int) ref + "syscall/js.valueIndex": (sp) => { + sp >>>= 0; + storeValue(sp + 24, Reflect.get(loadValue(sp + 8), getInt64(sp + 16))); + }, + + // valueSetIndex(v ref, i int, x ref) + "syscall/js.valueSetIndex": (sp) => { + sp >>>= 0; + Reflect.set(loadValue(sp + 8), getInt64(sp + 16), loadValue(sp + 24)); + }, + + // func valueCall(v ref, m string, args []ref) (ref, bool) + "syscall/js.valueCall": (sp) => { + sp >>>= 0; + try { + const v = loadValue(sp + 8); + const m = Reflect.get(v, loadString(sp + 16)); + const args = loadSliceOfValues(sp + 32); + const result = Reflect.apply(m, v, args); + sp = this._inst.exports.getsp() >>> 0; // see comment above + storeValue(sp + 56, result); + this.mem.setUint8(sp + 64, 1); + } catch (err) { + storeValue(sp + 56, err); + this.mem.setUint8(sp + 64, 0); + } + }, + + // func valueInvoke(v ref, args []ref) (ref, bool) + "syscall/js.valueInvoke": (sp) => { + sp >>>= 0; + try { + const v = loadValue(sp + 8); + const args = loadSliceOfValues(sp + 16); + const result = Reflect.apply(v, undefined, args); + sp = this._inst.exports.getsp() >>> 0; // see comment above + storeValue(sp + 40, result); + this.mem.setUint8(sp + 48, 1); + } catch (err) { + storeValue(sp + 40, err); + this.mem.setUint8(sp + 48, 0); + } + }, + + // func valueNew(v ref, args []ref) (ref, bool) + "syscall/js.valueNew": (sp) => { + sp >>>= 0; + try { + const v = loadValue(sp + 8); + const args = loadSliceOfValues(sp + 16); + const result = Reflect.construct(v, args); + sp = this._inst.exports.getsp() >>> 0; // see comment above + storeValue(sp + 40, result); + this.mem.setUint8(sp + 48, 1); + } catch (err) { + storeValue(sp + 40, err); + this.mem.setUint8(sp + 48, 0); + } + }, + + // func valueLength(v ref) int + "syscall/js.valueLength": (sp) => { + sp >>>= 0; + setInt64(sp + 16, parseInt(loadValue(sp + 8).length)); + }, + + // valuePrepareString(v ref) (ref, int) + "syscall/js.valuePrepareString": (sp) => { + sp >>>= 0; + const str = encoder.encode(String(loadValue(sp + 8))); + storeValue(sp + 16, str); + setInt64(sp + 24, str.length); + }, + + // valueLoadString(v ref, b []byte) + "syscall/js.valueLoadString": (sp) => { + sp >>>= 0; + const str = loadValue(sp + 8); + loadSlice(sp + 16).set(str); + }, + + // func valueInstanceOf(v ref, t ref) bool + "syscall/js.valueInstanceOf": (sp) => { + sp >>>= 0; + this.mem.setUint8(sp + 24, (loadValue(sp + 8) instanceof loadValue(sp + 16)) ? 1 : 0); + }, + + // func copyBytesToGo(dst []byte, src ref) (int, bool) + "syscall/js.copyBytesToGo": (sp) => { + sp >>>= 0; + const dst = loadSlice(sp + 8); + const src = loadValue(sp + 32); + if (!(src instanceof Uint8Array || src instanceof Uint8ClampedArray)) { + this.mem.setUint8(sp + 48, 0); + return; + } + const toCopy = src.subarray(0, dst.length); + dst.set(toCopy); + setInt64(sp + 40, toCopy.length); + this.mem.setUint8(sp + 48, 1); + }, + + // func copyBytesToJS(dst ref, src []byte) (int, bool) + "syscall/js.copyBytesToJS": (sp) => { + sp >>>= 0; + const dst = loadValue(sp + 8); + const src = loadSlice(sp + 16); + if (!(dst instanceof Uint8Array || dst instanceof Uint8ClampedArray)) { + this.mem.setUint8(sp + 48, 0); + return; + } + const toCopy = src.subarray(0, dst.length); + dst.set(toCopy); + setInt64(sp + 40, toCopy.length); + this.mem.setUint8(sp + 48, 1); + }, + + "debug": (value) => { + console.log(value); + }, + } + }; + } + + async run(instance) { + if (!(instance instanceof WebAssembly.Instance)) { + throw new Error("Go.run: WebAssembly.Instance expected"); + } + this._inst = instance; + this.mem = new DataView(this._inst.exports.mem.buffer); + this._values = [ // JS values that Go currently has references to, indexed by reference id + NaN, + 0, + null, + true, + false, + global, + this, + ]; + this._goRefCounts = new Array(this._values.length).fill(Infinity); // number of references that Go has to a JS value, indexed by reference id + this._ids = new Map([ // mapping from JS values to reference ids + [0, 1], + [null, 2], + [true, 3], + [false, 4], + [global, 5], + [this, 6], + ]); + this._idPool = []; // unused ids that have been garbage collected + this.exited = false; // whether the Go program has exited + + // Pass command line arguments and environment variables to WebAssembly by writing them to the linear memory. + let offset = 4096; + + const strPtr = (str) => { + const ptr = offset; + const bytes = encoder.encode(str + "\0"); + new Uint8Array(this.mem.buffer, offset, bytes.length).set(bytes); + offset += bytes.length; + if (offset % 8 !== 0) { + offset += 8 - (offset % 8); + } + return ptr; + }; + + const argc = this.argv.length; + + const argvPtrs = []; + this.argv.forEach((arg) => { + argvPtrs.push(strPtr(arg)); + }); + argvPtrs.push(0); + + const keys = Object.keys(this.env).sort(); + keys.forEach((key) => { + argvPtrs.push(strPtr(`${key}=${this.env[key]}`)); + }); + argvPtrs.push(0); + + const argv = offset; + argvPtrs.forEach((ptr) => { + this.mem.setUint32(offset, ptr, true); + this.mem.setUint32(offset + 4, 0, true); + offset += 8; + }); + + this._inst.exports.run(argc, argv); + if (this.exited) { + this._resolveExitPromise(); + } + await this._exitPromise; + } + + _resume() { + if (this.exited) { + throw new Error("Go program has already exited"); + } + this._inst.exports.resume(); + if (this.exited) { + this._resolveExitPromise(); + } + } + + _makeFuncWrapper(id) { + const go = this; + return function () { + const event = { + id: id, + this: this, + args: arguments + }; + go._pendingEvent = event; + go._resume(); + return event.result; + }; + } + } + + if ( + typeof module !== "undefined" && + global.require && + global.require.main === module && + global.process && + global.process.versions && + !global.process.versions.electron + ) { + if (process.argv.length < 3) { + console.error("usage: go_js_wasm_exec [wasm binary] [arguments]"); + process.exit(1); + } + + const go = new Go(); + go.argv = process.argv.slice(2); + go.env = Object.assign({ + TMPDIR: require("os").tmpdir() + }, process.env); + go.exit = process.exit; + WebAssembly.instantiate(fs.readFileSync(process.argv[2]), go.importObject).then((result) => { + process.on("exit", (code) => { // Node.js exits if no event handler is pending + if (code === 0 && !go.exited) { + // deadlock, make Go print error and stack traces + go._pendingEvent = { + id: 0 + }; + go._resume(); + } + }); + return go.run(result.instance); + }).catch((err) => { + console.error(err); + process.exit(1); + }); + } +})(); \ No newline at end of file