- (async() => {
- const imports = {};
- imports.wasi_snapshot_preview1 = {
- "fd_write" : () => {
- console.log("ABORT");
- },
- "random_get" : () => {
- console.log("ABORT");
- },
- "environ_sizes_get" : () => {
- console.log("wasi_snapshot_preview1:environ_sizes_get");
- },
- "proc_exit" : () => {
- console.log("wasi_snapshot_preview1:proc_exit");
- },
- "environ_get" : () => {
- console.log("wasi_snapshot_preview1:environ_get");
- },
- };
- imports.env = {};
-
- const memory = new WebAssembly.Memory({initial: 256});
- imports.env.memoryBase = 0;
- imports.env.memory = memory;
- imports.env.tableBase = 0;
- imports.env.table = new WebAssembly.Table({ initial: 4, element: 'anyfunc' });
-
- imports.env["abort"] = function() {
- console.error("ABORT");
- };
- imports.env["js_log"] = function(argument) {
- console.log("HI");
- const res = decodeUint8Array(argument, false);
- console.log(res);
- };
- imports.env["js_free"] = function(argument) {
- console.log('integer passed from wasm:', argument);
- };
- imports.env["js_invoke_function"] = function(fn, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10) {
- console.log('function called from wasm:', fn);
- };
-
- const stream = fetch('../../liblightningjs.wasm');
- const { instance: wasmInstance } = await WebAssembly.instantiateStreaming(stream, imports);
- const wasm = wasmInstance.exports;
-
-
- const encodeUint8Array = (inputArray) => {
- const cArrayPointer = wasm.TS_malloc(inputArray.length + 4);
- const arrayLengthView = new Uint32Array(memory.buffer, cArrayPointer, 1);
- arrayLengthView[0] = inputArray.length;
- const arrayMemoryView = new Uint8Array(memory.buffer, cArrayPointer + 4, inputArray.length);
- arrayMemoryView.set(inputArray);
- return cArrayPointer;
- }
-
- const encodeUint32Array = (inputArray) => {
- const cArrayPointer = wasm.TS_malloc((inputArray.length + 1) * 4);
- const arrayMemoryView = new Uint32Array(memory.buffer, cArrayPointer, inputArray.length);
- arrayMemoryView[0] = inputArray.length;
- arrayMemoryView.set(inputArray, 1);
- return cArrayPointer;
- }
-
- const getArrayLength = (arrayPointer) => {
- const arraySizeViewer = new Uint32Array(
- memory.buffer, // value
- arrayPointer, // offset
- 1 // one int
- );
- return arraySizeViewer[0];
- }
- const decodeUint8Array = (arrayPointer, free = true) => {
- const arraySize = getArrayLength(arrayPointer);
- const actualArrayViewer = new Uint8Array(
- memory.buffer, // value
- arrayPointer + 4, // offset (ignoring length bytes)
- arraySize // uint8 count
- );
- // Clone the contents, TODO: In the future we should wrap the Viewer in a class that
- // will free the underlying memory when it becomes unreachable instead of copying here.
- const actualArray = actualArrayViewer.slice(0, arraySize);
- if (free) {
- wasm.TS_free(arrayPointer);
- }
- return actualArray;