File: connected-users-websocket/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/bench/util.js

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File: connected-users-websocket/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/bench/util.js
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/*! * ws: a node.js websocket client * Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com> * MIT Licensed */ /** * Returns a Buffer from a "ff 00 ff"-type hex string. */ getBufferFromHexString = function(byteStr) { var bytes = byteStr.split(' '); var buf = new Buffer(bytes.length); for (var i = 0; i < bytes.length; ++i) { buf[i] = parseInt(bytes[i], 16); } return buf; } /** * Returns a hex string from a Buffer. */ getHexStringFromBuffer = function(data) { var s = ''; for (var i = 0; i < data.length; ++i) { s += padl(data[i].toString(16), 2, '0') + ' '; } return s.trim(); } /** * Splits a buffer in two parts. */ splitBuffer = function(buffer) { var b1 = new Buffer(Math.ceil(buffer.length / 2)); buffer.copy(b1, 0, 0, b1.length); var b2 = new Buffer(Math.floor(buffer.length / 2)); buffer.copy(b2, 0, b1.length, b1.length + b2.length); return [b1, b2]; } /** * Performs hybi07+ type masking on a hex string or buffer. */ mask = function(buf, maskString) { if (typeof buf == 'string') buf = new Buffer(buf); var mask = getBufferFromHexString(maskString || '34 83 a8 68'); for (var i = 0; i < buf.length; ++i) { buf[i] ^= mask[i % 4]; } return buf; } /** * Returns a hex string representing the length of a message */ getHybiLengthAsHexString = function(len, masked) { if (len < 126) { var buf = new Buffer(1); buf[0] = (masked ? 0x80 : 0) | len; } else if (len < 65536) { var buf = new Buffer(3); buf[0] = (masked ? 0x80 : 0) | 126; getBufferFromHexString(pack(4, len)).copy(buf, 1); } else { var buf = new Buffer(9); buf[0] = (masked ? 0x80 : 0) | 127; getBufferFromHexString(pack(16, len)).copy(buf, 1); } return getHexStringFromBuffer(buf); } /** * Unpacks a Buffer into a number. */ unpack = function(buffer) { var n = 0; for (var i = 0; i < buffer.length; ++i) { n = (i == 0) ? buffer[i] : (n * 256) + buffer[i]; } return n; } /** * Returns a hex string, representing a specific byte count 'length', from a number. */ pack = function(length, number) { return padl(number.toString(16), length, '0').replace(/([0-9a-f][0-9a-f])/gi, '$1 ').trim(); } /** * Left pads the string 's' to a total length of 'n' with char 'c'. */ padl = function(s, n, c) { return new Array(1 + n - s.length).join(c) + s; }