diff --git a/.gitignore b/.gitignore index 66fd13c..0cff6c3 100644 --- a/.gitignore +++ b/.gitignore @@ -13,3 +13,7 @@ # Dependency directories (remove the comment below to include it) # vendor/ + +.vscode/ +.idea/ +*.wasm \ No newline at end of file diff --git a/README.md b/README.md index cee4076..081a826 100644 --- a/README.md +++ b/README.md @@ -47,4 +47,8 @@ generate token ``` $ ispx -ghtoken your_github_api_token github.com/goplus/FlappyCalf -``` \ No newline at end of file +``` + +### run spx offline demo + +see [Offline SPX Project](offline_spx/README.md) \ No newline at end of file diff --git a/offline_spx/README.md b/offline_spx/README.md new file mode 100644 index 0000000..452aa00 --- /dev/null +++ b/offline_spx/README.md @@ -0,0 +1,54 @@ +# Offline SPX Project + +## Introduction + +This project allows users to compile SPX projects offline by uploading folders and then run and view them on the Web. +Users can upload the entire project folder, view the file structure and content, and run the project directly in the +browser. + +index.html is as follows: + +![index](./image/index.png) + +## Features + +- Folder Upload: Users can upload the entire SPX project folder. +- File Structure Viewing: After uploading, users can browse the tree structure of the folder. +- File Content Viewing: Users can view the content of each file uploaded. +- Online Execution: Users can run the SPX project in the web browser and view the results. + +## How to Use + +### Folder Upload + +![folder_upload](./image/folder_upload.png) + +- Click the "Select Folder" button. +- Choose your SPX project folder and upload it. + +### View File Structure and Content + +- After a successful upload, the file structure will be displayed on the page in a tree format. + + ![show_file_structure](./image/show_file_structure.png) +- Enter the file's project path (starting with the project name) to view the content in the respective area. + + ![file_content](./image/file_content.png) + +### Run Project Online + +![online_game](./image/online_game.png) + +- Ensure that your project files include all necessary files for execution. +- Input the project name +- Click the "play project" button to start the project in the browser. +- The execution results will be displayed in the designated output area. + +## Installation and Running + +```sh +./build.sh +cp $GOROOT/misc/wasm/wasm_exec.js ./ +``` + +run http server \ No newline at end of file diff --git a/offline_spx/build.sh b/offline_spx/build.sh new file mode 100644 index 0000000..501abe2 --- /dev/null +++ b/offline_spx/build.sh @@ -0,0 +1,2 @@ +#!/bin/sh +GOOS=js GOARCH=wasm go build -tags canvas -o main.wasm main.go \ No newline at end of file diff --git a/offline_spx/ifs/dir.go b/offline_spx/ifs/dir.go new file mode 100644 index 0000000..6743465 --- /dev/null +++ b/offline_spx/ifs/dir.go @@ -0,0 +1,43 @@ +package ifs + +import ( + "bytes" + "fmt" + "io" + "io/ioutil" +) + +// IndexedDBDir is the implementation of a fs.Dir +type IndexedDBDir struct { + assert string +} + +func NewIndexedDBDir(assert string) *IndexedDBDir { + return &IndexedDBDir{ + assert: assert, + } +} + +// Open opens a file +func (d *IndexedDBDir) Open(file string) (ret io.ReadCloser, err error) { + defer func() { + if r := recover(); r != nil { + err = fmt.Errorf("IndexedDBDir.Open %s panic %s", file, r) + } + }() + + file = d.assert + "/" + file + + content, err := readFileFromIndexedDB(file) + if err != nil { + err = fmt.Errorf("error reading file from IndexedDB: %w", err) + } + ret = ioutil.NopCloser(bytes.NewReader(content)) + return +} + +// Close closes the directory (in this implementation, this method does nothing) +func (d *IndexedDBDir) Close() error { + // In actual applications, you may need to perform cleanup operations + return nil +} diff --git a/offline_spx/ifs/direntry.go b/offline_spx/ifs/direntry.go new file mode 100644 index 0000000..ee49ef8 --- /dev/null +++ b/offline_spx/ifs/direntry.go @@ -0,0 +1,32 @@ +package ifs + +import ( + "io/fs" + "os" + "time" +) + +// IndexedDBDirEntry is the implementation of a fs.DirEntry +type IndexedDBDirEntry struct { + Path string + IsDirectory bool + Size int64 + ModTime time.Time +} + +func (e IndexedDBDirEntry) Name() string { return e.Path } +func (e IndexedDBDirEntry) IsDir() bool { return e.IsDirectory } +func (e IndexedDBDirEntry) Type() fs.FileMode { + if e.IsDir() { + return os.ModeDir + } + return 0 // file +} +func (e IndexedDBDirEntry) Info() (fs.FileInfo, error) { + return IndexedDBFileInfo{ + name: e.Path, + size: e.Size, + modTime: e.ModTime, + isDir: e.IsDirectory, + }, nil +} diff --git a/offline_spx/ifs/fileinfo.go b/offline_spx/ifs/fileinfo.go new file mode 100644 index 0000000..6e7cf31 --- /dev/null +++ b/offline_spx/ifs/fileinfo.go @@ -0,0 +1,26 @@ +package ifs + +import ( + "os" + "time" +) + +// IndexedDBFileInfo is the implementation of an os.FileInfo +type IndexedDBFileInfo struct { + name string + size int64 + modTime time.Time + isDir bool +} + +func (fi IndexedDBFileInfo) Name() string { return fi.name } +func (fi IndexedDBFileInfo) Size() int64 { return fi.size } +func (fi IndexedDBFileInfo) Mode() os.FileMode { + if fi.isDir { + return os.ModeDir + } + return 0 +} +func (fi IndexedDBFileInfo) ModTime() time.Time { return fi.modTime } +func (fi IndexedDBFileInfo) IsDir() bool { return fi.isDir } +func (fi IndexedDBFileInfo) Sys() interface{} { return nil } diff --git a/offline_spx/ifs/filesystem.go b/offline_spx/ifs/filesystem.go new file mode 100644 index 0000000..424e40b --- /dev/null +++ b/offline_spx/ifs/filesystem.go @@ -0,0 +1,74 @@ +package ifs + +import ( + "fmt" + "io/fs" + "path" + "strings" +) + +// IndexedDBFileSystem is the implementation of a fsx.FileSystem +type IndexedDBFileSystem struct{} + +func NewIndexedDBFileSystem() *IndexedDBFileSystem { + return &IndexedDBFileSystem{} +} + +// ReadDir Read directory contents +func (IndexedDBFileSystem) ReadDir(dirname string) (ret []fs.DirEntry, err error) { + dirname = path.Clean(dirname) + if dirname != "." && !strings.HasSuffix(dirname, "/") { + dirname += "/" + } + + uniqueEntries := make(map[string]bool) + + filesList, err := getFilesStartingWith(dirname) + if err != nil { + err = fmt.Errorf("error getting files starting with %s: %w", dirname, err) + return + } + + for _, filePath := range filesList { + // Get relative path + relativePath := strings.TrimPrefix(filePath, dirname) + + // Split path to get possible direct subdirectories or files + splitPath := strings.Split(relativePath, "/") + if len(splitPath) > 0 { + entry := splitPath[0] + if _, exists := uniqueEntries[entry]; !exists { + isDir := len(splitPath) > 1 // If the length after splitting the path is greater than 1, it is a directory + fileProperties, err := getFileProperties(filePath) + if err != nil { + return nil, err + } + + ret = append(ret, IndexedDBDirEntry{ + Path: entry, + IsDirectory: isDir, + Size: fileProperties.Size, + ModTime: fileProperties.LastModified, + }) + uniqueEntries[entry] = true + } + } + + } + + return +} + +// ReadFile Read file contents +func (IndexedDBFileSystem) ReadFile(filename string) (ret []byte, err error) { + ret, err = readFileFromIndexedDB(filename) + if err != nil { + err = fmt.Errorf("error reading file from IndexedDB: %w", err) + } + return +} + +// Join Connect path elements +func (IndexedDBFileSystem) Join(elem ...string) string { + return path.Join(elem...) +} diff --git a/offline_spx/ifs/filesystem.js b/offline_spx/ifs/filesystem.js new file mode 100644 index 0000000..725e44c --- /dev/null +++ b/offline_spx/ifs/filesystem.js @@ -0,0 +1,100 @@ +// configuration of IndexedDB +const dbName = 'myDatabase'; +const dbVersion = 2; +const storeName = 'files'; + +let db; +let request = indexedDB.open(dbName, dbVersion); + +request.onupgradeneeded = function (event) { + let db = event.target.result; + if (!db.objectStoreNames.contains(storeName)) { + db.createObjectStore(storeName, { keyPath: 'path' }); + } +}; + +request.onsuccess = function (event) { + db = event.target.result; +}; + +request.onerror = function (event) { + console.error('Database error:', event.target.error); +}; + +// Read the contents of the specified file +function readFileFromIndexedDB(filePath) { + return new Promise((resolve, reject) => { + const transaction = db.transaction([storeName], 'readonly'); + const store = transaction.objectStore(storeName); + const request = store.get(filePath); + + request.onsuccess = function (event) { + const fileData = event.target.result; + if (fileData && fileData.content) { + resolve(new Uint8Array(fileData.content)); // 假设 content 是 ArrayBuffer + } else { + reject('File not found'); + } + }; + + request.onerror = function (event) { + reject('Error reading file from IndexedDB: ' + event.target.errorCode); + }; + }); +} + +// Get the size and last modified date of the specified file +function getFileProperties(filePath) { + return new Promise((resolve, reject) => { + const transaction = db.transaction([storeName], 'readonly'); + const store = transaction.objectStore(storeName); + const request = store.get(filePath); + + request.onsuccess = function (event) { + const fileData = event.target.result; + if (fileData) { + resolve({ + size: fileData.size, + lastModified: fileData.lastModified + }); + } else { + reject('File not found'); + } + }; + + request.onerror = function (event) { + reject('Error querying file properties from IndexedDB: ' + event.target.errorCode); + }; + }); +} + +// Get all files in the specified directory +function getFilesStartingWith(dirname) { + return new Promise((resolve, reject) => { + const transaction = db.transaction([storeName], 'readonly'); + const store = transaction.objectStore(storeName); + const request = store.getAll(); + const files = []; + + request.onsuccess = function (event) { + const allFiles = event.target.result; + allFiles.forEach(file => { + if (file.path.startsWith(dirname)) { + files.push(file.path); + } + }); + resolve(files); + }; + + request.onerror = function (event) { + reject('Error querying IndexedDB: ' + event.target.errorCode); + }; + }); +} + + + +// Expose these functions to the global object +window.readFileFromIndexedDB = readFileFromIndexedDB; +window.getFileProperties = getFileProperties; +window.getFilesStartingWith = getFilesStartingWith; \ No newline at end of file diff --git a/offline_spx/ifs/ifs_js.go b/offline_spx/ifs/ifs_js.go new file mode 100644 index 0000000..c1e6f76 --- /dev/null +++ b/offline_spx/ifs/ifs_js.go @@ -0,0 +1,105 @@ +package ifs + +import ( + "fmt" + "strconv" + "syscall/js" + "time" +) + +type FileProperties struct { + Size int64 + LastModified time.Time +} + +// Utility function for interacting with JavaScript +func callJSFunction(funcName string, args ...interface{}) (js.Value, error) { + jsGlobal := js.Global() + jsFunc := jsGlobal.Get(funcName) + if jsFunc.Type() == js.TypeUndefined { + return js.Undefined(), fmt.Errorf("%s function is not defined", funcName) + } + + promise := jsFunc.Invoke(args...) + done := make(chan js.Value) + errChan := make(chan error) + + onSuccess := js.FuncOf(func(this js.Value, args []js.Value) interface{} { + done <- args[0] + return nil + }) + onError := js.FuncOf(func(this js.Value, args []js.Value) interface{} { + errChan <- fmt.Errorf("error calling %s", funcName) + return nil + }) + + promise.Call("then", onSuccess) + promise.Call("catch", onError) + + select { + case result := <-done: + onSuccess.Release() + onError.Release() + return result, nil + case err := <-errChan: + onSuccess.Release() + onError.Release() + return js.Undefined(), err + } +} + +// getFilesStartingWith gets all files starting with a given directory name using a JavaScript function +func getFilesStartingWith(dirname string) ([]string, error) { + jsResult, err := callJSFunction("getFilesStartingWith", dirname) + if err != nil { + return nil, err + } + + length := jsResult.Length() + files := make([]string, length) + for i := 0; i < length; i++ { + files[i] = jsResult.Index(i).String() + } + return files, nil +} + +// readFileFromIndexedDB reads a file from IndexedDB using a JavaScript function +func readFileFromIndexedDB(filename string) ([]byte, error) { + jsResult, err := callJSFunction("readFileFromIndexedDB", filename) + if err != nil { + return nil, err + } + + // Handling the returned ArrayBuffer + length := jsResult.Get("byteLength").Int() + fileContent := make([]byte, length) + js.CopyBytesToGo(fileContent, jsResult) + + if len(fileContent) == 0 { + return nil, fmt.Errorf("error reading file from IndexedDB, result is empty") + } + return fileContent, nil +} + +// getFileProperties gets the properties of a file using a JavaScript function +func getFileProperties(filename string) (FileProperties, error) { + jsResult, err := callJSFunction("getFileProperties", filename) + if err != nil { + return FileProperties{}, err + } + + // Handling the returned object + size, _ := strconv.ParseInt(jsResult.Get("size").String(), 10, 64) + lastModifiedMillis, _ := strconv.ParseInt(jsResult.Get("lastModified").String(), 10, 64) + lastModified := time.Unix(0, lastModifiedMillis*int64(time.Millisecond)) + + fileProperties := FileProperties{ + Size: size, + LastModified: lastModified, + } + + if fileProperties.Size == 0 && fileProperties.LastModified.IsZero() { + return FileProperties{}, fmt.Errorf("error getting file properties, result is empty") + } + return fileProperties, nil +} diff --git a/offline_spx/image/file_content.png b/offline_spx/image/file_content.png new file mode 100644 index 0000000..118269b Binary files /dev/null and b/offline_spx/image/file_content.png differ diff --git a/offline_spx/image/folder_upload.png b/offline_spx/image/folder_upload.png new file mode 100644 index 0000000..213ef33 Binary files /dev/null and b/offline_spx/image/folder_upload.png differ diff --git a/offline_spx/image/index.png b/offline_spx/image/index.png new file mode 100644 index 0000000..0f23f45 Binary files /dev/null and b/offline_spx/image/index.png differ diff --git a/offline_spx/image/online_game.png b/offline_spx/image/online_game.png new file mode 100644 index 0000000..5f3da7d Binary files /dev/null and b/offline_spx/image/online_game.png differ diff --git a/offline_spx/image/show_file_structure.png b/offline_spx/image/show_file_structure.png new file mode 100644 index 0000000..add1d4b Binary files /dev/null and b/offline_spx/image/show_file_structure.png differ diff --git a/offline_spx/index.html b/offline_spx/index.html new file mode 100644 index 0000000..3e88f64 --- /dev/null +++ b/offline_spx/index.html @@ -0,0 +1,289 @@ + + + + + + + + + +
+ +
+
+
+ +
+
+ + +
+
+
+ + +
+ + +
+ + + + + + + \ No newline at end of file diff --git a/offline_spx/main.go b/offline_spx/main.go new file mode 100644 index 0000000..52f3d72 --- /dev/null +++ b/offline_spx/main.go @@ -0,0 +1,92 @@ +package main + +//go:generate qexp -outdir pkg github.com/goplus/spx + +import ( + "flag" + "fmt" + "github.com/goplus/igop" + "github.com/goplus/igop/gopbuild" + _ "github.com/goplus/igop/pkg/fmt" + _ "github.com/goplus/igop/pkg/math" + "github.com/goplus/ispx/offline_spx/ifs" + _ "github.com/goplus/ispx/pkg/github.com/goplus/spx" + _ "github.com/goplus/reflectx/icall/icall8192" + "github.com/goplus/spx" + "log" + "os" + "syscall/js" +) + +var ( + flagDumpSrc bool + flagTrace bool + flagDumpSSA bool + flagDumpPKG bool + flagVerbose bool +) + +func init() { + flag.Usage = func() { + fmt.Fprintf(os.Stderr, "ispc [flags] dir\n") + flag.PrintDefaults() + } + flag.BoolVar(&flagDumpSrc, "dumpsrc", false, "print source code") + flag.BoolVar(&flagDumpSSA, "dumpssa", false, "print ssa code information") + flag.BoolVar(&flagDumpPKG, "dumppkg", false, "print import pkgs") + flag.BoolVar(&flagTrace, "trace", false, "trace") + flag.BoolVar(&flagVerbose, "v", false, "print verbose information") +} + +func main() { + flagVerbose = true + global := js.Global().Get("top") + path := global.Get("project_path").String() + if flagVerbose { + log.Println("load url", path) + } + var mode igop.Mode + if flagDumpSSA { + mode |= igop.EnableDumpInstr + } + if flagTrace { + mode |= igop.EnableTracing + } + if flagDumpPKG { + mode |= igop.EnableDumpImports + } + ctx := igop.NewContext(mode) + var ( + data []byte + err error + ) + fs := ifs.NewIndexedDBFileSystem() + if flagVerbose { + log.Println("BuildDir", path) + } + data, err = gopbuild.BuildFSDir(ctx, fs, path) + if err != nil { + log.Panicln(err) + } + log.Println("buildFSdir success") + + igop.RegisterExternal("github.com/goplus/spx.Gopt_Game_Run", func(game spx.Gamer, resource interface{}, gameConf ...*spx.Config) { + asset := path + "/" + resource.(string) + fs := ifs.NewIndexedDBDir(asset) + if err != nil { + log.Panicln(err) + } + spx.Gopt_Game_Run(game, fs, gameConf...) + }) + + if flagDumpSrc { + fmt.Println(string(data)) + } + + //log.Println("source code is: %s", string(data)) + + _, err = ctx.RunFile("main.go", data, nil) + if err != nil { + log.Panicln(err) + } +} diff --git a/offline_spx/main.html b/offline_spx/main.html new file mode 100644 index 0000000..ce35b25 --- /dev/null +++ b/offline_spx/main.html @@ -0,0 +1,17 @@ + + + + \ No newline at end of file diff --git a/offline_spx/wasm_exec.js b/offline_spx/wasm_exec.js new file mode 100644 index 0000000..9ce6a20 --- /dev/null +++ b/offline_spx/wasm_exec.js @@ -0,0 +1,554 @@ +// 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. + +"use strict"; + +(() => { + const enosys = () => { + const err = new Error("not implemented"); + err.code = "ENOSYS"; + return err; + }; + + if (!globalThis.fs) { + let outputBuf = ""; + globalThis.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 (!globalThis.process) { + globalThis.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 (!globalThis.crypto) { + throw new Error("globalThis.crypto is not available, polyfill required (crypto.getRandomValues only)"); + } + + if (!globalThis.performance) { + throw new Error("globalThis.performance is not available, polyfill required (performance.now only)"); + } + + if (!globalThis.TextEncoder) { + throw new Error("globalThis.TextEncoder is not available, polyfill required"); + } + + if (!globalThis.TextDecoder) { + throw new Error("globalThis.TextDecoder is not available, polyfill required"); + } + + const encoder = new TextEncoder("utf-8"); + const decoder = new TextDecoder("utf-8"); + + globalThis.Go = class { + constructor() { + this.argv = ["js"]; + this.env = {}; + this.exit = (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 walltime() (sec int64, nsec int32) + "runtime.walltime": (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) { + sp = this._inst.exports.getsp() >>> 0; // see comment above + 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) { + sp = this._inst.exports.getsp() >>> 0; // see comment above + 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) { + sp = this._inst.exports.getsp() >>> 0; // see comment above + 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, + globalThis, + 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], + [globalThis, 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; + }); + + // The linker guarantees global data starts from at least wasmMinDataAddr. + // Keep in sync with cmd/link/internal/ld/data.go:wasmMinDataAddr. + const wasmMinDataAddr = 4096 + 8192; + if (offset >= wasmMinDataAddr) { + throw new Error("total length of command line and environment variables exceeds limit"); + } + + 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; + }; + } + } +})();