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shrine-medco/shrine-webclient/src/main/html/node_modules/ws/lib/BufferPool.js
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BufferPool.js
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			/*!
			* ws: a node.js websocket client
			* Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
			* MIT Licensed
			*/

			var util = require('util');

			function BufferPool(initialSize, growStrategy, shrinkStrategy) {
			if (this instanceof BufferPool === false) {
			throw new TypeError("Classes can't be function-called");
			}

			if (typeof initialSize === 'function') {
			shrinkStrategy = growStrategy;
			growStrategy = initialSize;
			initialSize = 0;
			}
			else if (typeof initialSize === 'undefined') {
			initialSize = 0;
			}
			this._growStrategy = (growStrategy \|\| function(db, size) {
			return db.used + size;
			}).bind(null, this);
			this._shrinkStrategy = (shrinkStrategy \|\| function(db) {
			return initialSize;
			}).bind(null, this);
			this._buffer = initialSize ? new Buffer(initialSize) : null;
			this._offset = 0;
			this._used = 0;
			this._changeFactor = 0;
			this.__defineGetter__('size', function(){
			return this._buffer == null ? 0 : this._buffer.length;
			});
			this.__defineGetter__('used', function(){
			return this._used;
			});
			}

			BufferPool.prototype.get = function(length) {
			if (this._buffer == null \|\| this._offset + length > this._buffer.length) {
			var newBuf = new Buffer(this._growStrategy(length));
			this._buffer = newBuf;
			this._offset = 0;
			}
			this._used += length;
			var buf = this._buffer.slice(this._offset, this._offset + length);
			this._offset += length;
			return buf;
			}

			BufferPool.prototype.reset = function(forceNewBuffer) {
			var len = this._shrinkStrategy();
			if (len < this.size) this._changeFactor -= 1;
			if (forceNewBuffer \|\| this._changeFactor < -2) {
			this._changeFactor = 0;
			this._buffer = len ? new Buffer(len) : null;
			}
			this._offset = 0;
			this._used = 0;
			}

			module.exports = BufferPool;