Initial project import

node_modules/meshoptimizer/wasi_trace.js

@@ -0,0 +1,54 @@
+// Usage:
+// 1. import { wasi_trace } from './wasi_trace.js';
+// 2. Pass wasi_trace as an import object to WebAssembly.instantiate
+// 3. Call wasi_trace.init(instance) after instantiation
+
+var instance;
+
+var wasi_snapshot_preview1 = {
+	fd_close: function () {
+		return 8;
+	},
+	fd_seek: function () {
+		return 8;
+	},
+	fd_fdstat_get: function (fd, stat) {
+		// needed for isatty() to enable line buffering for stdout
+		var heap = new DataView(instance.exports.memory.buffer);
+		heap.setUint8(stat, 2);
+		for (var i = 1; i < 24; ++i) heap.setUint8(stat + i, 0);
+		return 0;
+	},
+	fd_write: function (fd, iovs, iovs_len, nwritten) {
+		var heap = new DataView(instance.exports.memory.buffer);
+		var written = 0;
+		var str = '';
+
+		for (var i = 0; i < iovs_len; ++i) {
+			var buf = heap.getUint32(iovs + 8 * i + 0, true);
+			var buf_len = heap.getUint32(iovs + 8 * i + 4, true);
+
+			var buf_data = new Uint8Array(heap.buffer, buf, buf_len);
+
+			for (var j = 0; j < buf_data.length; ++j) {
+				str += String.fromCharCode(buf_data[j]);
+			}
+			written += buf_len;
+		}
+
+		console.log(str);
+
+		heap.setUint32(nwritten, written, true);
+		return 0;
+	},
+};
+
+var wasi_trace = {
+	wasi_snapshot_preview1,
+
+	init: function (inst) {
+		instance = inst;
+	},
+};
+
+export { wasi_trace };