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byte.js.html
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<!DOCTYPE html>
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<title>JSDoc: Source: byte.js</title>
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<h1 class="page-title">Source: byte.js</h1>
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<article>
<pre class="prettyprint source linenums"><code>/*
字节操作
Thanks：https://github.com/zenxds/byte-tool/blob/master/index.js
*/
/**
* [move description] 将数字右移
* @param v {String} 原数字
* @param bits {Number} 移动位数
* @param bytes {Number} 控制右移之后的结果范围
* @return {Number} 返回右移结果
*/
function move(v, bits, bytes){
return (v >> bits) & (Math.pow(2, (typeof bytes === 'undefined' ? 1 : bytes) * 8) - 1);
}
/**
* [bs2 description] 通过字节操作将数字转换成有2个字节的数组
* @param v {Number} 原数字
* @return {Array} 转换后的数组
*/
var bs2 = function(v) {
return [move(v, 8), move(v, 0)]
};
/**
* [bs4 description] 通过字节操作将数字转换成有4个字节的数组
* @param v {Number} 原数字
* @return {Array} 转换后的数组
*/
var bs4 = function(v) {
return bs2(move(v, 16, 2)).concat(bs2(move(v, 0, 2)))
};
/**
* [bs8 description] 通过字节操作将数字转换成有8个字节的数组
* @param v {Number} 原数字
* @return {Array} 转换后的数组
*/
var bs8 = function(v) {
return bs4(v / Math.pow(2, 32)).concat(bs4(v, 0, 4))
};</code></pre>
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Documentation generated by <a href="https://github.com/jsdoc/jsdoc">JSDoc 3.6.10</a> on Mon Feb 14 2022 16:57:07 GMT+0800 (China Standard Time)
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