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1 /* |
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2 * Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * |
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5 * Redistribution and use in source and binary forms, with or without |
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6 * modification, are permitted provided that the following conditions are met: |
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7 * |
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8 * - Redistributions of source code must retain the above copyright notice, |
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9 * this list of conditions and the following disclaimer. |
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10 * - Redistributions in binary form must reproduce the above copyright notice, |
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11 * this list of conditions and the following disclaimer in the documentation |
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12 * and/or other materials provided with the distribution. |
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13 * - Neither the name of Nokia Corporation nor the names of its contributors |
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14 * may be used to endorse or promote products derived from this software |
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15 * without specific prior written permission. |
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16 * |
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17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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21 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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27 * POSSIBILITY OF SUCH DAMAGE. |
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28 * |
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29 * Initial Contributors: |
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30 * Nokia Corporation - initial contribution. |
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31 * |
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32 * Contributors: |
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33 * |
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34 * Description: |
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35 * |
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36 */ |
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37 |
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38 using System; |
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39 using System.Collections.Generic; |
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40 using System.Text; |
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41 using HeapLib.Statistics; |
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42 using HeapLib.Cells.Descriptors.Implementations.Unicode; |
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43 using HeapLib.Cells.Descriptors.Implementations.Ascii; |
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44 |
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45 namespace HeapLib.Cells.Descriptors |
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46 { |
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47 internal class DescriptorAlgorithmManager |
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48 { |
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49 #region API |
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50 public static DescriptorInfo DescriptorInfo( HeapCell aCell, HeapStatistics aStats ) |
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51 { |
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52 DescriptorInfo ret = null; |
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53 // |
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54 if ( iAlgorithms.Count == 0 ) |
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55 { |
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56 PrepareAlgorithms( aStats ); |
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57 } |
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58 // |
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59 foreach ( DescriptorAlgorithmBase alg in iAlgorithms ) |
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60 { |
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61 bool isDes = alg.IsDescriptor( aCell, out ret ); |
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62 if ( isDes && ret != null ) |
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63 { |
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64 // We won't allow any algorithm to "recognise" the heap cell as a descriptor |
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65 // unless it can say that the length is > 0. |
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66 int length = ret.Length; |
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67 if ( length > 0 ) |
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68 { |
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69 break; |
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70 } |
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71 else |
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72 { |
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73 ret = null; |
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74 } |
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75 } |
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76 } |
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77 return ret; |
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78 } |
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79 #endregion |
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80 |
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81 #region Internal methods |
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82 private static void PrepareAlgorithms( HeapStatistics aStats ) |
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83 { |
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84 // UNICODE |
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85 iAlgorithms.Add( new DesUnicodeAlgorithmHBufC( aStats ) ); |
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86 iAlgorithms.Add( new DesUnicodeAlgorithmModifiableBuffers( aStats ) ); |
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87 |
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88 // ASCII |
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89 iAlgorithms.Add( new DesAsciiAlgorithmHBufC( aStats ) ); |
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90 iAlgorithms.Add( new DesAsciiAlgorithmModifiableBuffers( aStats ) ); |
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91 |
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92 // C-STRING |
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93 iAlgorithms.Add( new DesAsciiAlgorithmNullTerminatedString( aStats ) ); |
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94 } |
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95 #endregion |
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96 |
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97 #region Data members |
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98 private static List<DescriptorAlgorithmBase> iAlgorithms = new List<DescriptorAlgorithmBase>(); |
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99 #endregion |
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100 } |
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101 } |