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fix: use
syscall/js for interop (#3)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,44 +1,47 @@ | ||
| import { Go } from "./go_wasm.js"; | ||
| const go = new Go(); | ||
|
|
||
| let mod; | ||
| let inst; | ||
|
|
||
| export default async function init(wasm_url) { | ||
| if (!mod) { | ||
| if (!wasm_url) { | ||
| wasm_url = new URL("lib.wasm", import.meta.url); | ||
| } | ||
| if (inst) { | ||
| return await inst; | ||
| } | ||
|
|
||
| if (typeof wasm_url === "string") { | ||
| wasm_url = new URL(wasm_url); | ||
| } | ||
| if (!wasm_url) { | ||
| wasm_url = new URL("lib.wasm", import.meta.url); | ||
| } | ||
|
|
||
| if ( | ||
| typeof __webpack_require__ !== "function" && | ||
| wasm_url.protocol === "file:" | ||
| ) { | ||
| const fs = await import("node:fs"); | ||
| const bytes = fs.readFileSync(wasm_url); | ||
| mod = new WebAssembly.Module(bytes); | ||
| } else if ("compileStreaming" in WebAssembly) { | ||
| mod = await WebAssembly.compileStreaming(fetch(wasm_url)); | ||
| } else { | ||
| const response = await fetch(wasm_url); | ||
| const bytes = await response.arrayBuffer(); | ||
| mod = new WebAssembly.Module(bytes); | ||
| } | ||
| if (typeof wasm_url === "string") { | ||
| wasm_url = new URL(wasm_url); | ||
| } | ||
| } | ||
|
|
||
| export function format(input) { | ||
| const inst = new WebAssembly.Instance(mod, go.importObject); | ||
| if ( | ||
| typeof __webpack_require__ !== "function" && | ||
| wasm_url.protocol === "file:" | ||
| ) { | ||
| inst = import("node:fs/promises") | ||
| .then((fs) => fs.readFile(wasm_url)) | ||
| .then((bytes) => WebAssembly.instantiate(bytes, go.importObject)); | ||
| } else if ("instantiateStreaming" in WebAssembly) { | ||
| inst = WebAssembly.instantiateStreaming( | ||
| fetch(wasm_url), | ||
| go.importObject | ||
| ); | ||
| } else { | ||
| inst = fetch(wasm_url) | ||
| .then((response) => response.arrayBuffer()) | ||
| .then((bytes) => WebAssembly.instantiate(bytes, go.importObject)); | ||
| } | ||
| inst = (await inst).instance; | ||
| go.run(inst); | ||
| } | ||
|
|
||
| const input_len = go.storeString(input); | ||
| const output_len = inst.exports.format(input_len); | ||
| if (output_len < 0) { | ||
| throw new Error(go.loadString(-output_len)); | ||
| export function format(input) { | ||
| const [err, result] = inst.format(input); | ||
| if (err) { | ||
| throw new Error(result); | ||
| } | ||
|
|
||
| return go.loadString(output_len); | ||
| return result; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,31 +1,23 @@ | ||
| package main | ||
|
|
||
| import "go/format" | ||
| import ( | ||
| "go/format" | ||
| "syscall/js" | ||
| ) | ||
|
|
||
| const buf_len = 8192 | ||
| func Format(this js.Value, args []js.Value) any { | ||
| input := ([]byte)(args[0].String()) | ||
|
|
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| var buf [buf_len]byte | ||
|
|
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| //go:export getBuffer | ||
| func GetBuffer() *byte { | ||
| return &buf[0] | ||
| } | ||
|
|
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| //go:export format | ||
| func Format(input_len uint) int { | ||
| input := buf[:input_len] | ||
| output, err := format.Source(input) | ||
| if err != nil { | ||
| return -copy(buf[:], []byte(err.Error())) | ||
| return []interface{}{true, err.Error()} | ||
| } | ||
| result := len(output) | ||
|
|
||
| if result > buf_len { | ||
| return -copy(buf[:], []byte("Buffer out of memory")) | ||
| } | ||
|
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| copy(buf[:], output) | ||
| return result | ||
| return []interface{}{false, string(output)} | ||
| } | ||
|
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| func main() {} | ||
| func main() { | ||
| done := make(chan bool) | ||
| js.Global().Set("format", js.FuncOf(Format)) | ||
| <-done | ||
| } |