deno.land / std@0.166.0 / bytes / equals.ts

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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
/** Check whether binary arrays are equal to each other using 8-bit comparisons. * @private * @param a first array to check equality * @param b second array to check equality */export function equalsNaive(a: Uint8Array, b: Uint8Array): boolean { if (a.length !== b.length) return false; for (let i = 0; i < b.length; i++) { if (a[i] !== b[i]) return false; } return true;}
/** Check whether binary arrays are equal to each other using 32-bit comparisons. * @private * @param a first array to check equality * @param b second array to check equality */export function equals32Bit(a: Uint8Array, b: Uint8Array): boolean { if (a.length !== b.length) return false; const len = a.length; const compressable = Math.floor(len / 4); const compressedA = new Uint32Array(a.buffer, 0, compressable); const compressedB = new Uint32Array(b.buffer, 0, compressable); for (let i = compressable * 4; i < len; i++) { if (a[i] !== b[i]) return false; } for (let i = 0; i < compressedA.length; i++) { if (compressedA[i] !== compressedB[i]) return false; } return true;}
/** Check whether binary arrays are equal to each other. * @param a first array to check equality * @param b second array to check equality */export function equals(a: Uint8Array, b: Uint8Array): boolean { if (a.length < 1000) return equalsNaive(a, b); return equals32Bit(a, b);}
std
Deno standard library
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Tagged at
2 months ago