Mercurial > repos > IBBoard
annotate IO/BinaryReaderBigEndian.cs @ 30:23fd4247fc1c
* Add "big-endian" binary reader that reads ints/shorts in big-endian format
* Add methods to String Manipulation to output a byte string as hex characters
no-open-ticket
author | IBBoard <dev@ibboard.co.uk> |
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date | Sun, 19 Apr 2009 11:31:47 +0000 |
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children | 267cd5ce66ff |
rev | line source |
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30
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1 // This file (FileStreamstream.cs) is a part of the IBBoard project and is copyright 2009 IBBoard |
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2 // |
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3 // The file and the library/program it is in are licensed under the GNU LGPL license, either version 3 of the License or (at your option) any later version. Please see COPYING.LGPL for more information and the full license. |
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4 // |
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5 |
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6 using System; |
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7 using System.Collections.Generic; |
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8 using System.IO; |
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9 using System.Text; |
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10 |
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11 namespace IBBoard |
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12 { |
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13 /// <summary> |
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14 /// A custom replacement for the BinaryReader that reads numbers as big-endian and also provides methods to read byte delimited strings. |
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15 /// </summary> |
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16 public class BinaryReaderBigEndian |
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17 { |
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18 private Stream stream; |
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19 private Encoding encoding; |
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20 |
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21 public BinaryReaderBigEndian(Stream input) : this(input, Encoding.UTF8) |
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22 { |
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23 } |
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24 |
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25 public BinaryReaderBigEndian(Stream input, Encoding encoding) |
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27 stream = input; |
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28 this.encoding = encoding; |
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29 } |
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30 |
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31 public byte[] ReadBytes(int byteCount) |
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32 { |
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33 byte[] bytes = new byte[byteCount]; |
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34 stream.Read(bytes, 0, byteCount); |
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35 return bytes; |
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36 } |
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37 |
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38 private byte[] ReadBytesForNumber(int byteCount) |
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39 { |
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40 byte[] bytes = ReadBytes(byteCount); |
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41 int halfCount = byteCount / 2; |
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42 |
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43 for (int i = 0, j = byteCount - 1; i < halfCount; i++, j--) |
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45 byte temp = bytes[i]; |
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46 bytes[i] = bytes[j]; |
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47 bytes[j] = temp; |
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48 } |
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49 |
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50 return bytes; |
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52 |
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53 public byte ReadByte() |
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55 return (byte)stream.ReadByte(); |
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57 |
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58 public short ReadShort() |
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60 return BitConverter.ToInt16(ReadBytesForNumber(2), 0); |
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61 } |
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62 |
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63 public ushort ReadUShort() |
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64 { |
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65 return BitConverter.ToUInt16(ReadBytesForNumber(2), 0); |
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66 } |
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67 |
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68 public int ReadInt() |
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70 return BitConverter.ToInt32(ReadBytesForNumber(4), 0); |
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71 } |
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72 |
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73 public uint ReadUInt() |
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75 return BitConverter.ToUInt32(ReadBytesForNumber(4), 0); |
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76 } |
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78 public string ReadDelimitedString(byte delimiter) |
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80 List<byte> bytes = new List<byte>(); |
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81 |
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82 while (!EndOfStream) |
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84 byte b = ReadByte(); |
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85 |
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86 if (b!=delimiter) |
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88 bytes.Add(b); |
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90 else |
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92 break; |
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93 } |
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94 } |
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96 return encoding.GetString(bytes.ToArray()); |
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97 } |
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98 |
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99 public string ReadString(int length) |
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101 byte[] bytes = ReadBytes(length); |
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102 return encoding.GetString(bytes); |
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103 } |
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104 |
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105 public string ReadUShortLengthString() |
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106 { |
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107 ushort length = ReadUShort(); |
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108 return ReadString(length); |
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109 } |
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110 |
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111 public string ReadIntLengthString() |
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112 { |
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113 int length = ReadInt(); |
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114 return ReadString(length); |
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115 } |
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116 |
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117 public void Seek(int distance) |
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118 { |
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119 stream.Seek(distance, SeekOrigin.Begin); |
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120 } |
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121 |
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122 public void Move(int distance) |
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123 { |
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124 stream.Seek(distance, SeekOrigin.Current); |
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125 } |
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126 |
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127 public void Close() |
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128 { |
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129 stream.Close(); |
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130 } |
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131 |
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132 public bool EndOfStream |
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133 { |
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134 get { return stream.Length - 1 == stream.Position; } |
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135 } |
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136 } |
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137 } |