Make a Val with rust.
Requires rust, wasm-pack and deno.
- Put your code in
val.rs. - Build it.
wasm-pack build --target nodejsdeno run --allow-read --allow-write package.ts
- Copy the code in
val.tsto your val.
Last active
December 26, 2023 00:29
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Rust Val
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| [package] | |
| name = "rust_val" | |
| version = "0.1.0" | |
| edition = "2018" | |
| [lib] | |
| name="rust_val" | |
| path="val.rs" | |
| crate-type = ["cdylib", "rlib"] | |
| [features] | |
| default = ["console_error_panic_hook"] | |
| [dependencies] | |
| wasm-bindgen = "0.2.84" | |
| console_error_panic_hook = { version = "0.1.7", optional = true } | |
| [dev-dependencies] | |
| wasm-bindgen-test = "0.3.34" | |
| [profile.release] | |
| opt-level = "s" |
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| import * as base64 from "https://deno.land/std@0.207.0/encoding/base64.ts"; | |
| const decoder = new TextDecoder("utf-8"); | |
| const cargo_file = decoder.decode(await Deno.readFile("./Cargo.toml")); | |
| if (cargo_file === null) { | |
| throw new Error("Cargo.toml not found"); | |
| } | |
| const cargo_package = /\[package\]\nname = "(.*?)"/.exec(cargo_file); | |
| if (cargo_package === null) { | |
| throw new Error("Cargo.toml is invalid"); | |
| } | |
| const cargo_package_name = cargo_package[1]; | |
| const name = cargo_package_name.replace(/-/g, "_"); | |
| const bytes = await Deno.readFile(`./pkg/${name}_bg.wasm`); | |
| if (bytes === null) { | |
| throw new Error(`pkg/${name}_bg.wasm not found`); | |
| } | |
| const encoded = base64.encodeBase64(bytes); | |
| const js_file = decoder.decode(await Deno.readFile(`./pkg/${name}.js`)); | |
| if (js_file === null) { | |
| throw new Error(`pkg/${name}.js not found`); | |
| } | |
| const patched = | |
| "" + | |
| `import * as base64 from "https://deno.land/std/encoding/base64.ts"\n\n` + | |
| `const bytes = base64.decodeBase64(\n` + | |
| ` // base64 encoded wasm module\n` + | |
| ` ${JSON.stringify(encoded)}\n` + | |
| `);\n\n` + | |
| js_file | |
| .replace("let imports = {};", "let imports: any = {};") | |
| // use global TextDecoder TextEncoder | |
| .replace("require(`util`)", "globalThis") | |
| // attach to `imports` instead of module.exports | |
| .replace("= module.exports", "= imports") | |
| .replace(/\nmodule\.exports\.(.*?)\s+/g, "\nexport const $1 = imports.$1 ") | |
| .replace(/$/, "export default imports") | |
| // inline bytes Uint8Array | |
| .replace(/\nconst path.*\nconst bytes.*\n/, ""); | |
| const encoder = new TextEncoder(); | |
| await Deno.writeFile(`./val.ts`, encoder.encode(patched)); |
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| pub fn set_panic_hook() { | |
| // When the `console_error_panic_hook` feature is enabled, we can call the | |
| // `set_panic_hook` function at least once during initialization, and then | |
| // we will get better error messages if our code ever panics. | |
| // | |
| // For more details see | |
| // https://github.com/rustwasm/console_error_panic_hook#readme | |
| #[cfg(feature = "console_error_panic_hook")] | |
| console_error_panic_hook::set_once(); | |
| } |
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| mod util; | |
| use wasm_bindgen::prelude::*; | |
| #[wasm_bindgen] | |
| extern "C" { | |
| #[wasm_bindgen(js_namespace = console)] | |
| fn log(s: &str); | |
| } | |
| #[wasm_bindgen] | |
| pub fn say_hello() { | |
| log("Hello from Rust, it works!"); | |
| } | |
| #[wasm_bindgen] | |
| pub fn add(x: i32, y: i32) -> i32 { | |
| x + y | |
| } |
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| import * as base64 from "https://deno.land/std/encoding/base64.ts"; | |
| const bytes = base64.decodeBase64( | |
| // base64 encoded wasm module | |
| "AGFzbQEAAAABDwNgAn9/AGAAAGACf38BfwI3ARhfX3diaW5kZ2VuX3BsYWNlaG9sZGVyX18aX193YmdfbG9nXzA4ODUwZDZkNGQ5MWY0YzkAAAMDAgECBQMBABEHHAMGbWVtb3J5AgADYWRkAAIJc2F5X2hlbGxvAAEKFQILAEGAgMAAQRoQAAsHACAAIAFqCwsjAQBBgIDAAAsaSGVsbG8gZnJvbSBSdXN0LCBpdCB3b3JrcyEAbwlwcm9kdWNlcnMCCGxhbmd1YWdlAQRSdXN0AAxwcm9jZXNzZWQtYnkDBXJ1c3RjHTEuNzIuMCAoNTY4MGZhMThmIDIwMjMtMDgtMjMpBndhbHJ1cwYwLjIwLjMMd2FzbS1iaW5kZ2VuBjAuMi44OQAsD3RhcmdldF9mZWF0dXJlcwIrD211dGFibGUtZ2xvYmFscysIc2lnbi1leHQ=" | |
| ); | |
| let imports: any = {}; | |
| imports["__wbindgen_placeholder__"] = imports; | |
| let wasm; | |
| const { TextDecoder } = globalThis; | |
| let cachedTextDecoder = new TextDecoder("utf-8", { | |
| ignoreBOM: true, | |
| fatal: true, | |
| }); | |
| cachedTextDecoder.decode(); | |
| let cachedUint8Memory0 = null; | |
| function getUint8Memory0() { | |
| if (cachedUint8Memory0 === null || cachedUint8Memory0.byteLength === 0) { | |
| cachedUint8Memory0 = new Uint8Array(wasm.memory.buffer); | |
| } | |
| return cachedUint8Memory0; | |
| } | |
| function getStringFromWasm0(ptr, len) { | |
| ptr = ptr >>> 0; | |
| return cachedTextDecoder.decode(getUint8Memory0().subarray(ptr, ptr + len)); | |
| } | |
| /** | |
| */ | |
| export const say_hello = (imports.say_hello = function () { | |
| wasm.say_hello(); | |
| }); | |
| /** | |
| * @param {number} x | |
| * @param {number} y | |
| * @returns {number} | |
| */ | |
| export const add = (imports.add = function (x, y) { | |
| const ret = wasm.add(x, y); | |
| return ret; | |
| }); | |
| export const __wbg_log_08850d6d4d91f4c9 = (imports.__wbg_log_08850d6d4d91f4c9 = | |
| function (arg0, arg1) { | |
| console.log(getStringFromWasm0(arg0, arg1)); | |
| }); | |
| const wasmModule = new WebAssembly.Module(bytes); | |
| const wasmInstance = new WebAssembly.Instance(wasmModule, imports); | |
| wasm = wasmInstance.exports; | |
| export const __wasm = (imports.__wasm = wasm); | |
| export default imports; |
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