63 lines
1.4 KiB
JavaScript
63 lines
1.4 KiB
JavaScript
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/*!
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* util/utf8.js - Implementation of UTF-8 Encoder/Decoder
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*
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* Copyright (c) 2015 Cisco Systems, Inc. See LICENSE file.
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*/
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"use strict";
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var partialRight = require("lodash/partialRight");
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var merge = require("lodash/merge");
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var typedArrayCtors = (function() {
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var ctors = [];
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if ("undefined" !== typeof Uint8ClampedArray) {
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ctors.push(Uint8ClampedArray);
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}
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if ("undefined" !== typeof Uint8Array) {
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ctors.push(Uint8Array);
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}
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if ("undefined" !== typeof Uint16Array) {
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ctors.push(Uint16Array);
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}
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if ("undefined" !== typeof Uint32Array) {
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ctors.push(Uint32Array);
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}
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if ("undefined" !== typeof Float32Array) {
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ctors.push(Float32Array);
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}
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if ("undefined" !== typeof Float64Array) {
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ctors.push(Float64Array);
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}
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return ctors;
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})();
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function findTypedArrayFor(ta) {
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var ctor;
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for (var idx = 0; !ctor && typedArrayCtors.length > idx; idx++) {
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if (ta instanceof typedArrayCtors[idx]) {
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ctor = typedArrayCtors[idx];
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}
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}
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return ctor;
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}
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function mergeBuffer(a, b) {
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// TODO: should this be a copy, or the reference itself?
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if (Buffer.isBuffer(b)) {
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b = Buffer.from(b);
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} else {
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var Ctor = findTypedArrayFor(b);
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b = Ctor ?
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new Ctor(b, b.byteOffset, b.byteLength) :
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undefined;
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}
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// TODO: QUESTION: create a merged <whatever-a-is>??
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// for now, a is b
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a = b;
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return b;
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}
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module.exports = partialRight(merge, mergeBuffer);
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