Implement ArrayBuffer handling for moreTypes #135

pack.js

@@ -953,6 +953,7 @@ function writeExtBuffer(typedArray, type, allocateForWrite, encode) {
 	}
 	target[position++] = 0x74 // "t" for typed array
 	target[position++] = type
+	if (!typedArray.buffer) typedArray = new Uint8Array(typedArray)
 	target.set(new Uint8Array(typedArray.buffer, typedArray.byteOffset, typedArray.byteLength), position)
 }
 function writeBuffer(buffer, allocateForWrite) {

tests/test.js

@@ -708,8 +708,12 @@ suite('msgpackr basic tests', function() {
 			test: 'string',
 			children: [
 				{ name: 'child' }
-			]
+			],
+			value: new ArrayBuffer(10)
 		}
+		let u8 = new Uint8Array(object.value)
+		u8[0] = 1
+		u8[1] = 2
 		object.self = object
 		object.children[1] = object
 		object.children[2] = object.children[0]
@@ -725,6 +729,10 @@ suite('msgpackr basic tests', function() {
 		assert.equal(deserialized.children[1], deserialized)
 		assert.equal(deserialized.children[0], deserialized.children[2])
 		assert.equal(deserialized.children, deserialized.childrenAgain)
+		assert.equal(deserialized.value.constructor.name, 'ArrayBuffer')
+		u8 = new Uint8Array(deserialized.value)
+		assert.equal(u8[0], 1)
+		assert.equal(u8[1], 2)
 	})
 
 	test('structured cloning: types', function() {

unpack.js

@@ -1054,8 +1054,15 @@ let glbl = typeof globalThis === 'object' ? globalThis : window;
 currentExtensions[0x74] = (data) => {
 	let typeCode = data[0]
 	let typedArrayName = typedArrays[typeCode]
-	if (!typedArrayName)
+	if (!typedArrayName) {
+		if (typeCode === 16) {
+			let ab = new ArrayBuffer(data.length - 1)
+			let u8 = new Uint8Array(ab)
+			u8.set(data.subarray(1))
+			return ab;
+		}
 		throw new Error('Could not find typed array for code ' + typeCode)
+	}
 	// we have to always slice/copy here to get a new ArrayBuffer that is word/byte aligned
 	return new glbl[typedArrayName](Uint8Array.prototype.slice.call(data, 1).buffer)
 }