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authorruki <waruqi@gmail.com>2018-11-08 00:38:48 +0800
committerruki <waruqi@gmail.com>2018-11-07 21:53:09 +0800
commit26105034da4fcce7ac883c899d781f016559310d (patch)
treec459a5dc4e3aa0972d9919033ece511ce76dd129 /node_modules/pretty-bytes/index.js
parent2c77f00f1a7ecb6c8192f9c16d3b2001b254a107 (diff)
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Diffstat (limited to 'node_modules/pretty-bytes/index.js')
-rw-r--r--node_modules/pretty-bytes/index.js24
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diff --git a/node_modules/pretty-bytes/index.js b/node_modules/pretty-bytes/index.js
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+'use strict';
+const UNITS = ['B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
+
+module.exports = num => {
+ if (!Number.isFinite(num)) {
+ throw new TypeError(`Expected a finite number, got ${typeof num}: ${num}`);
+ }
+
+ const neg = num < 0;
+
+ if (neg) {
+ num = -num;
+ }
+
+ if (num < 1) {
+ return (neg ? '-' : '') + num + ' B';
+ }
+
+ const exponent = Math.min(Math.floor(Math.log(num) / Math.log(1000)), UNITS.length - 1);
+ const numStr = Number((num / Math.pow(1000, exponent)).toPrecision(3));
+ const unit = UNITS[exponent];
+
+ return (neg ? '-' : '') + numStr + ' ' + unit;
+};