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1 /* |
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2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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15 * |
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16 */ |
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17 using System; |
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18 using System.Collections.Generic; |
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19 using System.Text; |
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20 using System.IO; |
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21 using SymbianUtils.Tracer; |
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22 using SymbianUtils.Streams; |
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23 using SymbianStructuresLib.Uids; |
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24 using SymbianStructuresLib.Compression.Common; |
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25 using SymbianImageLib.Common.Header; |
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26 using SymbianImageLib.Common.Image; |
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27 using SymbianImageLib.Common.Streams; |
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28 using SymbianImageLib.E32Image.Content; |
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29 using SymbianImageLib.E32Image.Header; |
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30 using SymbianImageLib.E32Image.Exceptions; |
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31 |
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32 namespace SymbianImageLib.E32Image.Image |
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33 { |
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34 public class SymbianImageE32 : SIImage |
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35 { |
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36 #region Constructors |
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37 public SymbianImageE32( FileInfo aFileInfo, ITracer aTracer ) |
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38 : this( aFileInfo.FullName, (uint) aFileInfo.Length, 0, new SIStream( aFileInfo.OpenRead() ), aTracer ) |
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39 { |
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40 } |
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41 |
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42 internal SymbianImageE32( string aImageName, uint aImageContentSize, long aImageContentOffset, SIStream aStream, ITracer aTracer ) |
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43 : base( aTracer, aStream, aImageName ) |
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44 { |
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45 iContentOffsetWithinDataStream = aImageContentOffset; |
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46 // |
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47 using ( SymbianStreamReaderLE reader = base.Stream.CreateReader() ) |
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48 { |
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49 reader.Seek( iContentOffsetWithinDataStream ); |
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50 iHeader = new SIHeaderE32Image( this, reader ); |
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51 } |
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52 |
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53 // Since we are a single e32 image, we have a single e32 Image file descriptor |
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54 SIContentE32Image file = new SIContentE32Image( this, aImageName, aImageContentSize, aImageContentOffset ); |
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55 base.RegisterFile( file ); |
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56 } |
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57 #endregion |
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58 |
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59 #region From SIImage |
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60 public override SIHeader Header |
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61 { |
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62 get { return iHeader; } |
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63 } |
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64 #endregion |
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65 |
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66 #region API |
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67 public static bool IsImageFile( Stream aStream ) |
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68 { |
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69 return IsImageFile( aStream, aStream.Position ); |
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70 } |
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71 |
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72 public static bool IsImageFile( Stream aStream, long aPosition ) |
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73 { |
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74 bool ret = false; |
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75 // |
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76 try |
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77 { |
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78 using ( SymbianStreamReaderLE reader = SymbianStreamReaderLE.New( aStream, SymbianStreamReaderLE.TCloseOperation.EResetPosition ) ) |
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79 { |
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80 aStream.Seek( aPosition, SeekOrigin.Begin ); |
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81 // |
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82 byte[] bytes = reader.ReadBytes( SIHeaderE32Image.KMinimumSize ); |
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83 ret = SIHeaderE32Image.IsSymbianImageHeader( bytes ); |
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84 } |
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85 } |
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86 catch ( Exception ) |
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87 { |
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88 } |
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89 return ret; |
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90 } |
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91 #endregion |
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92 |
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93 #region Properties |
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94 internal TCheckedUid Uid |
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95 { |
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96 get |
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97 { |
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98 return iHeader.Uid; |
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99 } |
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100 } |
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101 |
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102 internal long ContentOffsetWithinDataStream |
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103 { |
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104 get { return iContentOffsetWithinDataStream; } |
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105 } |
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106 #endregion |
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107 |
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108 #region Internal methods |
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109 #endregion |
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110 |
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111 #region Data members |
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112 private readonly SIHeaderE32Image iHeader; |
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113 private readonly long iContentOffsetWithinDataStream; |
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114 #endregion |
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115 } |
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116 } |