csharp/common/ByteArray.cs

   1 /*\r
   2 * Copyright 2008 ZXing authors\r
   3 *\r
   4 * Licensed under the Apache License, Version 2.0 (the "License");\r
   5 * you may not use this file except in compliance with the License.\r
   6 * You may obtain a copy of the License at\r
   7 *\r
   8 *      http://www.apache.org/licenses/LICENSE-2.0\r
   9 *\r
  10 * Unless required by applicable law or agreed to in writing, software\r
  11 * distributed under the License is distributed on an "AS IS" BASIS,\r
  12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
  13 * See the License for the specific language governing permissions and\r
  14 * limitations under the License.\r
  15 */\r
  16 using System;\r
  17 namespace com.google.zxing.common\r
  18 {\r
  19         \r
  20         /// <summary> This class implements an array of unsigned bytes.\r
  21         /// \r
  22         /// </summary>\r
  23         /// <author>  dswitkin@google.com (Daniel Switkin)\r
  24         /// </author>\r
  25         /// <author>www.Redivivus.in (suraj.supekar@redivivus.in) - Ported from ZXING Java Source \r
  26         /// </author>\r
  27         public sealed class ByteArray\r
  28         {\r
  29                 public bool Empty\r
  30                 {\r
  31                         get\r
  32                         {\r
  33                                 return size_Renamed_Field == 0;\r
  34                         }\r
  35                         \r
  36                 }\r
  37                 \r
  38                 private const int INITIAL_SIZE = 32;\r
  39                 \r
  40                 private sbyte[] bytes;\r
  41                 private int size_Renamed_Field;\r
  42                 \r
  43                 public ByteArray()\r
  44                 {\r
  45                         bytes = null;\r
  46                         size_Renamed_Field = 0;\r
  47                 }\r
  48                 \r
  49                 public ByteArray(int size)\r
  50                 {\r
  51                         bytes = new sbyte[size];\r
  52                         this.size_Renamed_Field = size;\r
  53                 }\r
  54                 \r
  55                 public ByteArray(sbyte[] byteArray)\r
  56                 {\r
  57                         bytes = byteArray;\r
  58                         size_Renamed_Field = bytes.Length;\r
  59                 }\r
  60                 \r
  61                 /// <summary> Access an unsigned byte at location index.</summary>\r
  62                 /// <param name="index">The index in the array to access.\r
  63                 /// </param>\r
  64                 /// <returns> The unsigned value of the byte as an int.\r
  65                 /// </returns>\r
  66                 public int at(int index)\r
  67                 {\r
  68                         return bytes[index] & 0xff;\r
  69                 }\r
  70                 \r
  71                 public void  set_Renamed(int index, int value_Renamed)\r
  72                 {\r
  73                         bytes[index] = (sbyte) value_Renamed;\r
  74                 }\r
  75                 \r
  76                 public int size()\r
  77                 {\r
  78                         return size_Renamed_Field;\r
  79                 }\r
  80                 \r
  81                 public void  appendByte(int value_Renamed)\r
  82                 {\r
  83                         if (size_Renamed_Field == 0 || size_Renamed_Field >= bytes.Length)\r
  84                         {\r
  85                                 int newSize = System.Math.Max(INITIAL_SIZE, size_Renamed_Field << 1);\r
  86                                 reserve(newSize);\r
  87                         }\r
  88                         bytes[size_Renamed_Field] = (sbyte) value_Renamed;\r
  89                         size_Renamed_Field++;\r
  90                 }\r
  91                 \r
  92                 public void  reserve(int capacity)\r
  93                 {\r
  94                         if (bytes == null || bytes.Length < capacity)\r
  95                         {\r
  96                                 sbyte[] newArray = new sbyte[capacity];\r
  97                                 if (bytes != null)\r
  98                                 {\r
  99                                         Array.Copy(bytes, 0, newArray, 0, bytes.Length);\r
 100                                 }\r
 101                                 bytes = newArray;\r
 102                         }\r
 103                 }\r
 104                 \r
 105                 // Copy count bytes from array source starting at offset.\r
 106                 public void  set_Renamed(sbyte[] source, int offset, int count)\r
 107                 {\r
 108                         bytes = new sbyte[count];\r
 109                         size_Renamed_Field = count;\r
 110                         for (int x = 0; x < count; x++)\r
 111                         {\r
 112                                 bytes[x] = source[offset + x];\r
 113                         }\r
 114                 }\r
 115         }\r
 116 }