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1 // Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 #ifndef __BARSREADIMPL_H__ |
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17 #define __BARSREADIMPL_H__ |
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18 |
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19 #include <e32std.h> |
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20 #include <badesca.h> |
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21 #include "BaAssert.h" |
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22 |
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23 /** Interprets resource data read from a resource file. |
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24 |
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25 To use an instance of this class, pass the buffer containing the resource |
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26 data to it by calling SetBuffer(). |
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27 |
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28 The buffer containing the resource data is created by RResourceFile::AllocReadLC()/CResourceFile::AllocReadLC() |
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29 or RResourceFile::AllocReadL()/CResourceFile::AllocReadL() which reads the specified resource into it. |
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30 |
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31 The current position within the buffer is always maintained and any request |
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32 for data is always supplied from the current position. The current position |
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33 is always updated . |
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34 |
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35 Expected behaviour when assignment operator or copy constructor is called: |
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36 The class doesn't have assignment operator and copy constructor, so the compiler generated |
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37 ones will be used. The buffer used by the source class instance will be shared with the |
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38 destination class instance. However source and destination instances will have their own |
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39 current position pointers, both pointed initially to the same buffer position. |
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40 |
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41 Methods panic/leave behaviour: "L" methods panics/leave behaviour depends on iAssertObj |
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42 member which could be initialized calling SetAssertObj. If iAssertObj internal state is |
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43 TBaAssert::EPanic - "L" methods will panic, otherwise they will leave if something goes wrong. |
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44 By default "L" methods will panic. |
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45 |
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46 @internalComponent |
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47 @see TResourceReaderImpl::SetBuffer() |
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48 @see RResourceFile::AllocReadL() |
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49 @see RResourceFile::AllocReadLC() |
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50 @see CResourceFile::AllocReadL() |
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51 @see CResourceFile::AllocReadLC() */ |
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52 class TResourceReaderImpl |
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53 { |
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54 public: |
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55 TResourceReaderImpl(); |
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56 |
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57 void SetBuffer(const TDesC8* aBuffer); |
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58 void ResetBuffer(); |
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59 const TAny* Ptr(); |
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60 |
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61 // Read counted strings into allocated buffer |
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62 HBufC8* ReadHBufC8L(); |
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63 HBufC16* ReadHBufC16L(); |
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64 |
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65 // Build pointer from a counted string |
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66 TPtrC8 ReadTPtrC8L(); |
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67 TPtrC16 ReadTPtrC16L(); |
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68 |
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69 // Build pointer from a counted string in an array of counted strings, |
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70 // also setting the buffer to be used. |
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71 TPtrC8 ReadTPtrC8L(TInt aIndex,const TDesC8* aBuffer); |
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72 TPtrC16 ReadTPtrC16L(TInt aIndex,const TDesC8* aBuffer); |
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73 |
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74 // Build an array of strings from a resource array |
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75 CDesC8ArrayFlat* ReadDesC8ArrayL(); |
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76 CDesC16ArrayFlat* ReadDesC16ArrayL(); |
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77 |
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78 TInt ReadInt8L(); |
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79 TUint ReadUint8L(); |
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80 TInt ReadInt16L(); |
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81 TUint ReadUint16L(); |
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82 TInt ReadInt32L(); |
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83 TUint ReadUint32L(); |
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84 TReal64 ReadReal64L() __SOFTFP; |
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85 |
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86 void ReadL(TAny* aPtr,TInt aLength); |
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87 void RewindL(TInt aLength); |
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88 void AdvanceL(TInt aLength); |
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89 |
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90 void SetAssertObj(const TBaAssert& iAssertObj); |
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91 private: |
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92 void MovePtrL(const TUint8* aPtr); |
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93 private: |
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94 const TDesC8* iBuffer; |
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95 const TUint8* iCurrentPtr; |
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96 TBaAssert iAssertObj; |
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97 }; |
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98 |
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99 #endif//__BARSREADIMPL_H__ |