ES6 modules

src/Net/Sockets/NetworkBuffer.js

@@ -0,0 +1,119 @@
+/*
+* Copyright (c) 2017 Ahmed Kh. Zamil
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy
+* of this software and associated documentation files (the "Software"), to deal
+* in the Software without restriction, including without limitation the rights
+* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+* copies of the Software, and to permit persons to whom the Software is
+* furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in all
+* copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+* SOFTWARE.
+*/
+
+/**
+ * Created by Ahmed Zamil on 01/09/2017.
+ */
+
+"use strict";  
+
+import DC from '../../Data/DataConverter.js';
+
+export default class NetworkBuffer {
+    constructor() {
+        this.neededDataLength = 0;
+        this.data = new DC(0);
+    }
+
+    get protected() {
+        return this.neededDataLength > this.data.length;
+    }
+
+    get available() {
+
+        return this.data.length;
+    }
+
+    holdAllForNextWrite(src) {
+        this.holdFor(src, src.length + 1);
+    }
+
+    holdForNextWrite(src, offset, size) {
+        this.holdFor(src, offset, size, size + 1);
+    }
+
+
+    holdFor(src, offset, size, needed) {
+        if (size >= needed)
+            throw new Exception("Size >= Needed !");
+
+        this.data = DC.combine(src, offset, size, this.data, 0, this.data.length);
+        this.neededDataLength = needed;
+    }
+
+    holdAllFor(src, needed) {
+        this.holdFor(src, 0, src.length, needed);
+    }
+
+    protect(data, offset, needed) {
+        var dataLength = data.length - offset;
+
+        // protection
+        if (dataLength < needed) {
+            this.holdFor(data, offset, dataLength, needed);
+            return true;
+        }
+        else
+            return false;
+    }
+
+    writeAll(src) {
+        this.write(src, 0, src.length ? src.length : src.byteLength);
+    }
+
+    write(src, offset, length) {
+        this.data = this.data.append(src, offset, length);
+    }
+
+    get canRead() {
+        if (this.data.length == 0)
+            return false;
+        else if (this.data.length < this.neededDataLength)
+            return false;
+        return true;
+    }
+
+    read() {
+        if (this.data.length == 0)
+            return null;
+
+        var rt = null;
+
+        if (this.neededDataLength == 0) {
+            rt = this.data;
+            this.data = new DC(0);
+        }
+        else {
+            if (this.data.length >= this.neededDataLength) {
+                rt = this.data;
+                this.data = new DC(0);
+                this.neededDataLength = 0;
+                return rt;
+            }
+            else {
+                return null;
+            }
+        }
+
+        return rt;
+    }
+}