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lib-typedarrays.js 2.18 KB
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evanvosberg 提交于 2015-04-01 15:11 . Merge branch 'release/3.1.4'
;(function (root, factory) {
if (typeof exports === "object") {
// CommonJS
module.exports = exports = factory(require("./core"));
}
else if (typeof define === "function" && define.amd) {
// AMD
define(["./core"], factory);
}
else {
// Global (browser)
factory(root.CryptoJS);
}
}(this, function (CryptoJS) {
(function () {
// Check if typed arrays are supported
if (typeof ArrayBuffer != 'function') {
return;
}
// Shortcuts
var C = CryptoJS;
var C_lib = C.lib;
var WordArray = C_lib.WordArray;
// Reference original init
var superInit = WordArray.init;
// Augment WordArray.init to handle typed arrays
var subInit = WordArray.init = function (typedArray) {
// Convert buffers to uint8
if (typedArray instanceof ArrayBuffer) {
typedArray = new Uint8Array(typedArray);
}
// Convert other array views to uint8
if (
typedArray instanceof Int8Array ||
(typeof Uint8ClampedArray !== "undefined" && typedArray instanceof Uint8ClampedArray) ||
typedArray instanceof Int16Array ||
typedArray instanceof Uint16Array ||
typedArray instanceof Int32Array ||
typedArray instanceof Uint32Array ||
typedArray instanceof Float32Array ||
typedArray instanceof Float64Array
) {
typedArray = new Uint8Array(typedArray.buffer, typedArray.byteOffset, typedArray.byteLength);
}
// Handle Uint8Array
if (typedArray instanceof Uint8Array) {
// Shortcut
var typedArrayByteLength = typedArray.byteLength;
// Extract bytes
var words = [];
for (var i = 0; i < typedArrayByteLength; i++) {
words[i >>> 2] |= typedArray[i] << (24 - (i % 4) * 8);
}
// Initialize this word array
superInit.call(this, words, typedArrayByteLength);
} else {
// Else call normal init
superInit.apply(this, arguments);
}
};
subInit.prototype = WordArray;
}());
return CryptoJS.lib.WordArray;
}));
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