20352515932

Committed 18 Dec 2025 09:56PM UTC coverage: 35.115% (-28.4%) from 63.485%

Build # 20352515932

Build Type

push

github

Committed by

web-flow

Commit Message

feat(loader-utils): Export is-type helpers (#3258)

Run Details

1188 of 1998 branches covered (59.46%)

Branch coverage included in aggregate %.

147 of 211 new or added lines in 13 files covered. (69.67%)

30011 existing lines in 424 files now uncovered.

37457 of 108056 relevant lines covered (34.66%)

0.79 hits per line

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77.6

/modules/loader-utils/src/lib/binary-utils/array-buffer-utils.ts

import {TypedArray} from '../../types';

/**
 * compare two binary arrays for equality
 * @param a
 * @param b
 * @param byteLength
 */
export function compareArrayBuffers(
  arrayBuffer1: ArrayBuffer,
  arrayBuffer2: ArrayBuffer,
  byteLength?: number
): boolean {
  byteLength = byteLength || arrayBuffer1.byteLength;
  if (arrayBuffer1.byteLength < byteLength || arrayBuffer2.byteLength < byteLength) {
    return false;
  }
  const array1 = new Uint8Array(arrayBuffer1);
  const array2 = new Uint8Array(arrayBuffer2);
  for (let i = 0; i < array1.length; ++i) {
    if (array1[i] !== array2[i]) {
      return false;
    }
  }
  return true;
}

/**
 * Concatenate a sequence of ArrayBuffers from arguments
 * @return A concatenated ArrayBuffer
 */
export function concatenateArrayBuffers(...sources: (ArrayBuffer | Uint8Array)[]): ArrayBuffer {
  return concatenateArrayBuffersFromArray(sources);
}

/**
 * Concatenate a sequence of ArrayBuffers from array
 * @return A concatenated ArrayBuffer
 */
export function concatenateArrayBuffersFromArray(
  sources: (ArrayBuffer | Uint8Array)[]
): ArrayBuffer {
  // Make sure all inputs are wrapped in typed arrays
  const sourceArrays = sources.map((source2) =>
    source2 instanceof ArrayBuffer ? new Uint8Array(source2) : source2
  );

  // Get length of all inputs
  const byteLength = sourceArrays.reduce((length, typedArray) => length + typedArray.byteLength, 0);

  // Allocate array with space for all inputs
  const result = new Uint8Array(byteLength);

  // Copy the subarrays
  let offset = 0;
  for (const sourceArray of sourceArrays) {
    result.set(sourceArray, offset);
    offset += sourceArray.byteLength;
  }

  // We work with ArrayBuffers, discard the typed array wrapper
  return result.buffer;
}

/**
 * Concatenate arbitrary count of typed arrays
 * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Typed_arrays
 * @param - list of arrays. All arrays should be the same type
 * @return A concatenated TypedArray
 */
export function concatenateTypedArrays<T>(...typedArrays: T[]): T {
  // @ts-ignore
  const arrays = typedArrays as TypedArray[];
  // @ts-ignore
  const TypedArrayConstructor = (arrays && arrays.length > 1 && arrays[0].constructor) || null;
  if (!TypedArrayConstructor) {
    throw new Error(
      '"concatenateTypedArrays" - incorrect quantity of arguments or arguments have incompatible data types'
    );
  }

  const sumLength = arrays.reduce((acc, value) => acc + value.length, 0);
  // @ts-ignore typescript does not like dynamic constructors
  const result = new TypedArrayConstructor(sumLength);
  let offset = 0;
  for (const array of arrays) {
    result.set(array, offset);
    offset += array.length;
  }
  return result;
}

/**
 * Copy a view of an ArrayBuffer into new ArrayBuffer with byteOffset = 0
 * @param arrayBuffer
 * @param byteOffset
 * @param byteLength
 */
export function sliceArrayBuffer(
  arrayBuffer: ArrayBuffer,
  byteOffset: number,
  byteLength?: number
): ArrayBuffer {
  const subArray =
    byteLength !== undefined
      ? new Uint8Array(arrayBuffer).subarray(byteOffset, byteOffset + byteLength)
      : new Uint8Array(arrayBuffer).subarray(byteOffset);
  const arrayCopy = new Uint8Array(subArray);
  return arrayCopy.buffer;
}

1	import {TypedArray} from '../../types';	1✔
2		1✔
3	/**	1✔
4	* compare two binary arrays for equality	1✔
5	* @param a	1✔
6	* @param b	1✔
7	* @param byteLength	1✔
8	*/	1✔
9	export function compareArrayBuffers(	1✔
UNCOV 10	arrayBuffer1: ArrayBuffer,	×
UNCOV 11	arrayBuffer2: ArrayBuffer,	×
UNCOV 12	byteLength?: number	×
UNCOV 13	): boolean {	×
UNCOV 14	byteLength = byteLength \|\| arrayBuffer1.byteLength;	×
UNCOV 15	if (arrayBuffer1.byteLength < byteLength \|\| arrayBuffer2.byteLength < byteLength) {	×
16	return false;	×
17	}	×
UNCOV 18	const array1 = new Uint8Array(arrayBuffer1);	×
UNCOV 19	const array2 = new Uint8Array(arrayBuffer2);	×
UNCOV 20	for (let i = 0; i < array1.length; ++i) {	×
UNCOV 21	if (array1[i] !== array2[i]) {	×
UNCOV 22	return false;	×
UNCOV 23	}	×
UNCOV 24	}	×
UNCOV 25	return true;	×
UNCOV 26	}	×
27		1✔
28	/**	1✔
29	* Concatenate a sequence of ArrayBuffers from arguments	1✔
30	* @return A concatenated ArrayBuffer	1✔
31	*/	1✔
32	export function concatenateArrayBuffers(...sources: (ArrayBuffer \| Uint8Array)[]): ArrayBuffer {	1✔
33	return concatenateArrayBuffersFromArray(sources);	9✔
34	}	9✔
35		1✔
36	/**	1✔
37	* Concatenate a sequence of ArrayBuffers from array	1✔
38	* @return A concatenated ArrayBuffer	1✔
39	*/	1✔
40	export function concatenateArrayBuffersFromArray(	1✔
41	sources: (ArrayBuffer \| Uint8Array)[]	9✔
42	): ArrayBuffer {	9✔
43	// Make sure all inputs are wrapped in typed arrays	9✔
44	const sourceArrays = sources.map((source2) =>	9✔
45	source2 instanceof ArrayBuffer ? new Uint8Array(source2) : source2	19✔
46	);	9✔
47		9✔
48	// Get length of all inputs	9✔
49	const byteLength = sourceArrays.reduce((length, typedArray) => length + typedArray.byteLength, 0);	9✔
50		9✔
51	// Allocate array with space for all inputs	9✔
52	const result = new Uint8Array(byteLength);	9✔
53		9✔
54	// Copy the subarrays	9✔
55	let offset = 0;	9✔
56	for (const sourceArray of sourceArrays) {	9✔
57	result.set(sourceArray, offset);	19✔
58	offset += sourceArray.byteLength;	19✔
59	}	19✔
60		9✔
61	// We work with ArrayBuffers, discard the typed array wrapper	9✔
62	return result.buffer;	9✔
63	}	9✔
64		1✔
65	/**	1✔
66	* Concatenate arbitrary count of typed arrays	1✔
67	* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Typed_arrays	1✔
68	* @param - list of arrays. All arrays should be the same type	1✔
69	* @return A concatenated TypedArray	1✔
70	*/	1✔
71	export function concatenateTypedArrays<T>(...typedArrays: T[]): T {	1✔
72	// @ts-ignore	4✔
73	const arrays = typedArrays as TypedArray[];	4✔
74	// @ts-ignore	4✔
75	const TypedArrayConstructor = (arrays && arrays.length > 1 && arrays[0].constructor) \|\| null;	4✔
76	if (!TypedArrayConstructor) {	4✔
77	throw new Error(	2✔
78	'"concatenateTypedArrays" - incorrect quantity of arguments or arguments have incompatible data types'	2✔
79	);	2✔
80	}	2✔
81		2✔
82	const sumLength = arrays.reduce((acc, value) => acc + value.length, 0);	2✔
83	// @ts-ignore typescript does not like dynamic constructors	2✔
84	const result = new TypedArrayConstructor(sumLength);	2✔
85	let offset = 0;	2✔
86	for (const array of arrays) {	4✔
87	result.set(array, offset);	5✔
88	offset += array.length;	5✔
89	}	5✔
90	return result;	2✔
91	}	2✔
92		1✔
93	/**	1✔
94	* Copy a view of an ArrayBuffer into new ArrayBuffer with byteOffset = 0	1✔
95	* @param arrayBuffer	1✔
96	* @param byteOffset	1✔
97	* @param byteLength	1✔
98	*/	1✔
99	export function sliceArrayBuffer(	1✔
UNCOV 100	arrayBuffer: ArrayBuffer,	×
UNCOV 101	byteOffset: number,	×
UNCOV 102	byteLength?: number	×
UNCOV 103	): ArrayBuffer {	×
UNCOV 104	const subArray =	×
UNCOV 105	byteLength !== undefined	×
UNCOV 106	? new Uint8Array(arrayBuffer).subarray(byteOffset, byteOffset + byteLength)	×
UNCOV 107	: new Uint8Array(arrayBuffer).subarray(byteOffset);	×
UNCOV 108	const arrayCopy = new Uint8Array(subArray);	×
UNCOV 109	return arrayCopy.buffer;	×
UNCOV 110	}	×

visgl / loaders.gl / 20352515932

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