You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
58 lines
1.8 KiB
58 lines
1.8 KiB
"use strict";
|
|
|
|
module.exports = {
|
|
/**
|
|
* True if this is running in Nodejs, will be undefined in a browser.
|
|
* In a browser, browserify won't include this file and the whole module
|
|
* will be resolved an empty object.
|
|
*/
|
|
isNode : typeof Buffer !== "undefined",
|
|
/**
|
|
* Create a new nodejs Buffer from an existing content.
|
|
* @param {Object} data the data to pass to the constructor.
|
|
* @param {String} encoding the encoding to use.
|
|
* @return {Buffer} a new Buffer.
|
|
*/
|
|
newBufferFrom: function(data, encoding) {
|
|
if (Buffer.from && Buffer.from !== Uint8Array.from) {
|
|
return Buffer.from(data, encoding);
|
|
} else {
|
|
if (typeof data === "number") {
|
|
// Safeguard for old Node.js versions. On newer versions,
|
|
// Buffer.from(number) / Buffer(number, encoding) already throw.
|
|
throw new Error("The \"data\" argument must not be a number");
|
|
}
|
|
return new Buffer(data, encoding);
|
|
}
|
|
},
|
|
/**
|
|
* Create a new nodejs Buffer with the specified size.
|
|
* @param {Integer} size the size of the buffer.
|
|
* @return {Buffer} a new Buffer.
|
|
*/
|
|
allocBuffer: function (size) {
|
|
if (Buffer.alloc) {
|
|
return Buffer.alloc(size);
|
|
} else {
|
|
var buf = new Buffer(size);
|
|
buf.fill(0);
|
|
return buf;
|
|
}
|
|
},
|
|
/**
|
|
* Find out if an object is a Buffer.
|
|
* @param {Object} b the object to test.
|
|
* @return {Boolean} true if the object is a Buffer, false otherwise.
|
|
*/
|
|
isBuffer : function(b){
|
|
return Buffer.isBuffer(b);
|
|
},
|
|
|
|
isStream : function (obj) {
|
|
return obj &&
|
|
typeof obj.on === "function" &&
|
|
typeof obj.pause === "function" &&
|
|
typeof obj.resume === "function";
|
|
}
|
|
};
|