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import * as Schema from "../../schema";
import { ByteBuffer } from "peechy";
import { transform as sucraseTransform } from "sucrase";
export interface WebAssemblyModule {
init(): number;
transform(a: number): number;
malloc(a: number): number;
calloc(a: number): number;
realloc(a: number): number;
free(a: number): number;
cycle(): void;
}
const wasm_imports_sym: symbol | string =
process.env.NODE_ENV === "development"
? "wasm_imports"
: Symbol("wasm_imports");
const ptr_converter = new ArrayBuffer(8);
const ptr_float = new Float64Array(ptr_converter);
const slice = new Uint32Array(ptr_converter);
var scratch: Uint8Array;
export class ESDev {
static has_initialized = false;
static wasm_source: WebAssembly.WebAssemblyInstantiatedSource = null;
static get wasm_exports(): WebAssemblyModule {
return ESDev.wasm_source.instance.exports as any;
}
static get memory() {
return ESDev[wasm_imports_sym].memory as WebAssembly.Memory;
}
static memory_array: Uint8Array;
static _decoder: TextDecoder;
static _wasmPtrToSlice(offset: number) {
if (ESDev.memory_array.buffer !== ESDev.memory.buffer) {
ESDev.memory_array = new Uint8Array(ESDev.memory.buffer);
}
ptr_float[0] = offset;
return ESDev.memory_array.subarray(slice[0], slice[0] + slice[1]);
}
static _wasmPtrLenToString(slice: number) {
if (!ESDev._decoder) {
ESDev._decoder = new TextDecoder("utf8");
}
const region = this._wasmPtrToSlice(slice);
return ESDev._decoder.decode(region);
}
// We don't want people to be calling these manually
static [wasm_imports_sym] = {
console_log(slice: number) {
console.log(ESDev._wasmPtrLenToString(slice));
},
console_error(slice: number) {
console.error(ESDev._wasmPtrLenToString(slice));
},
console_warn(slice: number) {
console.warn(ESDev._wasmPtrLenToString(slice));
},
console_info(slice: number) {
console.info(ESDev._wasmPtrLenToString(slice));
},
memory: null,
// __indirect_function_table: new WebAssembly.Table({
// initial: 0,
// element: "anyfunc",
// }),
// __stack_pointer: new WebAssembly.Global({
// mutable: true,
// value: "i32",
// }),
// __multi3(one: number, two: number) {
// return Math.imul(one | 0, two | 0);
// },
// fmod(one: number, two: number) {
// return one % two;
// },
// memset(ptr: number, value: number, len: number) {
// ESDev.memory_array.fill(value, ptr, ptr + len);
// },
// memcpy(ptr: number, value: number, len: number) {
// ESDev.memory_array.copyWithin(ptr, value, value + len);
// },
// // These functions convert a to an unsigned long long, rounding toward zero. Negative values all become zero.
// __fixunsdfti(a: number) {
// return Math.floor(a);
// },
// // These functions return the remainder of the unsigned division of a and b.
// __umodti3(a: number, b: number) {
// return (a | 0) % (b | 0);
// },
// // These functions return the quotient of the unsigned division of a and b.
// __udivti3(a: number, b: number) {
// return (a | 0) / (b | 0);
// },
// // These functions return the result of shifting a left by b bits.
// __ashlti3(a: number, b: number) {
// return (a | 0) >> (b | 0);
// },
// /* Returns: convert a to a double, rounding toward even. */
// __floatuntidf(a: number) {
// const mod = a % 2;
// if (mod === 0) {
// return Math.ceil(a);
// } else if (mod === 1) {
// return Math.floor(a);
// }
// },
};
static async init(url) {
globalThis.sucraseTransform = sucraseTransform;
scratch = new Uint8Array(8096);
if (ESDev.has_initialized) {
return;
}
ESDev[wasm_imports_sym].memory = new WebAssembly.Memory({
initial: 18,
// shared: typeof SharedArrayBuffer !== "undefined",
maximum: typeof SharedArrayBuffer !== "undefined" ? 5000 : undefined,
});
ESDev.wasm_source = await globalThis.WebAssembly.instantiateStreaming(
fetch(url),
{ env: ESDev[wasm_imports_sym] }
);
ESDev.memory_array = new Uint8Array(ESDev.memory.buffer);
const res = ESDev.wasm_exports.init();
if (res < 0) {
throw `[ESDev] Failed to initialize WASM module: code ${res}`;
} else {
console.log("WASM loaded.");
}
ESDev.has_initialized = true;
}
static transform(content: Uint8Array, file_name: string) {
if (!ESDev.has_initialized) {
throw "Please run await ESDev.init(wasm_url) before using this.";
}
// if (process.env.NODE_ENV === "development") {
// console.time("[ESDev] Transform " + file_name);
// }
const bb = new ByteBuffer(scratch);
bb.length = 0;
Schema.encodeTransform(
{
contents: content,
path: file_name,
},
bb
);
const data = bb.toUint8Array();
if (bb._data.buffer !== scratch.buffer) {
scratch = bb._data;
}
const ptr = ESDev.wasm_exports.malloc(data.byteLength);
this._wasmPtrToSlice(ptr).set(data);
const resp_ptr = ESDev.wasm_exports.transform(ptr);
var _bb = new ByteBuffer(this._wasmPtrToSlice(resp_ptr));
const response = Schema.decodeTransformResponse(_bb);
ESDev.wasm_exports.cycle();
return response;
}
}
globalThis.ESDev = ESDev;
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