53 lines
1.8 KiB
JavaScript
53 lines
1.8 KiB
JavaScript
'use strict';
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module.exports = {
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/**
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* True if this is running in Nodejs, will be undefined in a browser.
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* In a browser, browserify won't include this file and the whole module
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* will be resolved an empty object.
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*/
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isNode : typeof Buffer !== "undefined",
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/**
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* Create a new nodejs Buffer from an existing content.
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* @param {Object} data the data to pass to the constructor.
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* @param {String} encoding the encoding to use.
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* @return {Buffer} a new Buffer.
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*/
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newBufferFrom: function(data, encoding) {
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// XXX We can't use `Buffer.from` which comes from `Uint8Array.from`
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// in nodejs v4 (< v.4.5). It's not the expected implementation (and
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// has a different signature).
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// see https://github.com/nodejs/node/issues/8053
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// A condition on nodejs' version won't solve the issue as we don't
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// control the Buffer polyfills that may or may not be used.
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return new Buffer(data, encoding);
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},
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/**
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* Create a new nodejs Buffer with the specified size.
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* @param {Integer} size the size of the buffer.
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* @return {Buffer} a new Buffer.
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*/
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allocBuffer: function (size) {
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if (Buffer.alloc) {
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return Buffer.alloc(size);
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} else {
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return new Buffer(size);
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}
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},
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/**
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* Find out if an object is a Buffer.
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* @param {Object} b the object to test.
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* @return {Boolean} true if the object is a Buffer, false otherwise.
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*/
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isBuffer : function(b){
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return Buffer.isBuffer(b);
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},
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isStream : function (obj) {
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return obj &&
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typeof obj.on === "function" &&
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typeof obj.pause === "function" &&
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typeof obj.resume === "function";
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}
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};
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