@worker-tools/deno-kv-storage/script/deps/deno.land/std@0.114.0/bytes/equals.js

An implementation of the StorageArea (1,2,3) interface for Deno with an extensible system for supporting various database backends.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.equals = exports.equalsSimd = exports.equalsNaive = void 0;
/** 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
 */
function equalsNaive(a, b) {
    if (a.length !== b.length)
        return false;
    for (let i = 0; i < b.length; i++) {
        if (a[i] !== b[i])
            return false;
    }
    return true;
}
exports.equalsNaive = equalsNaive;
/** 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
 */
function equalsSimd(a, b) {
    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;
}
exports.equalsSimd = equalsSimd;
/** Check whether binary arrays are equal to each other.
 * @param a first array to check equality
 * @param b second array to check equality
 */
function equals(a, b) {
    if (a.length < 1000)
        return equalsNaive(a, b);
    return equalsSimd(a, b);
}
exports.equals = equals;
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