53 lines
1.7 KiB
JavaScript
53 lines
1.7 KiB
JavaScript
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/**
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* Compares two UintXArray and checks if their content is the same.
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* @param array1 {Uint8Array|Uint16Array|Uint32Array}
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* @param array2 {Uint8Array|Uint16Array|Uint32Array}
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* @return {boolean}
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*/
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export function areUintArraysEqual(array1, array2) {
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if ((typeof array1) !== (typeof array2)) {
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return false;
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}
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if (array1.length !== array2.length) {
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return false;
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}
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for (let i = 0; i < array1.length; i++) {
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if (array1[i] !== array2[i]) {
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return false;
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}
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}
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return true;
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}
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/**
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* Peeks a UInt32 from the given data at the given offset in Big-Endian.
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* @param data {Uint8Array} - Data to read from.
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* @param offset {number} - Offset to read from in the given `data`.
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* @return {number} The peeked number.
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* @throws RangeError If the given offset is too close or over the end of the data.
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*/
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export function peekUInt32BE(data, offset = 0) {
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if(offset + 4 > data.length) {
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throw new RangeError(`Offset is too far into the given data ! (${offset} & ${data.length})`);
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}
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return new DataView(data.buffer, offset, 4).getUint32(0, false);
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}
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/**
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* Peeks a UInt32 from the given data at the given offset in Little-Endian.
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* @param data {Uint8Array} - Data to read from.
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* @param offset {number} - Offset to read from in the given `data`.
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* @return {number} The peeked number.
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* @throws RangeError If the given offset is too close or over the end of the data.
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*/
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export function peekUInt32LE(data, offset = 0) {
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if(offset + 4 > data.length) {
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throw new RangeError(`Offset is too far into the given data ! (${offset} & ${data.length})`);
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}
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return new DataView(data.buffer, offset, 4).getUint32(0, true);
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}
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