Committed C# port from Mohamad

[zxing.git] / csharp / common / ByteArray.cs

diff --git a/csharp/common/ByteArray.cs b/csharp/common/ByteArray.cs
new file mode 100755 (executable)
index 0000000..5c4d828
--- /dev/null
+++ b/csharp/common/ByteArray.cs
@@ -0,0 +1,117 @@
+/*\r
+* Copyright 2008 ZXing authors\r
+*\r
+* Licensed under the Apache License, Version 2.0 (the "License");\r
+* you may not use this file except in compliance with the License.\r
+* You may obtain a copy of the License at\r
+*\r
+*      http://www.apache.org/licenses/LICENSE-2.0\r
+*\r
+* Unless required by applicable law or agreed to in writing, software\r
+* distributed under the License is distributed on an "AS IS" BASIS,\r
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
+* See the License for the specific language governing permissions and\r
+* limitations under the License.\r
+*/\r
+namespace com.google.zxing.common\r
+{\r
+    using System;\r
+    using System.Text;\r
+\r
+    /// <summary> A class which wraps a 2D array of bytes. The default usage is signed. If you want to use it as a\r
+    /// unsigned container, it's up to you to do byteValue & 0xff at each location.\r
+    /// *\r
+    /// JAVAPORT: I'm not happy about the argument ordering throughout the file, as I always like to have\r
+    /// the horizontal component first, but this is for compatibility with the C++ code. The original\r
+    /// code was a 2D array of ints, but since it only ever gets assigned -1, 0, and 1, I'm going to use\r
+    /// less memory and go with bytes.\r
+    /// *\r
+    /// </summary>\r
+    /// <author>  dswitkin@google.com (Daniel Switkin)\r
+    /// \r
+    /// </author>\r
+    public sealed class ByteArray\r
+    {\r
+        private static int INITIAL_SIZE = 32;\r
+        private sbyte[] bytes;\r
+        private int Size;\r
+\r
+        public ByteArray()\r
+        {\r
+            bytes = null;\r
+            this.Size = 0;\r
+        }\r
+\r
+        public ByteArray(int size)\r
+        {\r
+            bytes = new sbyte[size];\r
+            this.Size = size;\r
+        }\r
+\r
+        public ByteArray(sbyte[] byteArray)\r
+        {\r
+            bytes = byteArray;\r
+            this.Size = bytes.Length;\r
+        }\r
+\r
+        /**\r
+         * Access an unsigned byte at location index.\r
+         * @param index The index in the array to access.\r
+         * @return The unsigned value of the byte as an int.\r
+         */\r
+        public int at(int index)\r
+        {\r
+            return bytes[index] & 0xff;\r
+        }\r
+\r
+        public void set(int index, int value)\r
+        {\r
+            bytes[index] = (sbyte)value;\r
+        }\r
+\r
+        public int size()\r
+        {\r
+            return Size;\r
+        }\r
+\r
+        public bool empty()\r
+        {\r
+            return Size == 0;\r
+        }\r
+\r
+        public void appendByte(int value)\r
+        {\r
+            if (Size == 0 || Size >= bytes.Length)\r
+            {\r
+                int newSize = Math.Max(INITIAL_SIZE, Size << 1);\r
+                reserve(newSize);\r
+            }\r
+            bytes[Size] = (sbyte)value;\r
+            Size++;\r
+        }\r
+\r
+        public void reserve(int capacity)\r
+        {\r
+            if (bytes == null || bytes.Length < capacity)\r
+            {\r
+                sbyte[] newArray = new sbyte[capacity];\r
+                if (bytes != null)\r
+                {\r
+                    System.Array.Copy(bytes, 0, newArray, 0, bytes.Length);\r
+                }\r
+                bytes = newArray;\r
+            }\r
+        }\r
+\r
+        // Copy count bytes from array source starting at offset.\r
+        public void set(sbyte[] source, int offset, int count)\r
+        {\r
+            bytes = new sbyte[count];\r
+            Size = count;\r
+            for (int x = 0; x < count; x++)\r
+            {\r
+                bytes[x] = source[offset + x];\r
+            }\r
+        }\r
+    }\r
+}
\ No newline at end of file