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1 // Copyright (c) 2004-2009 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 // externalisablearray.inl |
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15 // Templated RArray for serialising and deserialising simple (flat) classes |
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16 // for transmission inside descriptors over IPC |
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17 // |
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18 // |
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19 |
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20 /** |
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21 @file |
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22 @publishedPartner |
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23 @released |
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24 */ |
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25 |
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26 namespace conn |
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27 { |
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28 template<class T> inline RExternalisableArray<T>* RExternalisableArray<T>::InternaliseL(const TDesC8& aExternalisedArray) |
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29 /** |
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30 Internalises an RArray of objects passed via IPC from a descriptor |
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31 |
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32 @param aExternalisedArray The descriptor passed via IPC that contains the flattened array to internalise |
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33 @return Pointer to a newly created RExternalisableArray |
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34 */ |
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35 { |
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36 RExternalisableArray<T>* self = new (ELeave) RExternalisableArray<T>; |
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37 |
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38 CleanupStack::PushL(self); |
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39 |
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40 TUint8* unpackPtr = const_cast<TUint8*>(aExternalisedArray.Ptr()); |
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41 TInt elementCount = *reinterpret_cast<TInt*>(unpackPtr); |
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42 |
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43 // point to the start of the packed elements |
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44 unpackPtr += sizeof(TInt); |
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45 |
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46 for (TInt index = 0; index < elementCount; index++) |
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47 { |
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48 User::LeaveIfError(self->Append(*reinterpret_cast<T*>(unpackPtr))); |
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49 unpackPtr += sizeof(T); |
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50 } |
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51 |
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52 CleanupStack::Pop(self); |
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53 |
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54 return self; |
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55 } |
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56 |
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57 template<class T> inline HBufC8* RExternalisableArray<T>::ExternaliseL() |
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58 /** |
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59 Externalises an RArray of objects (not pointers) into a descriptor so that the RArray |
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60 may be passed via IPC |
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61 |
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62 @return Pointer to the created HBufC8 |
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63 */ |
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64 { |
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65 // calculate the flattened size of the array |
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66 TInt elementSize = sizeof(T); |
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67 TInt count = RArray<T>::Count(); |
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68 TInt totalPackedSize = sizeof(TInt) + (sizeof(T) * count); // TInt stores the number of elements to be packed |
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69 |
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70 // create the HBufC8 to be returned |
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71 HBufC8* externalisedArray = HBufC8::NewL(totalPackedSize); |
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72 |
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73 TPtr8 buffer = externalisedArray->Des(); |
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74 |
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75 // Append the number of entries to the beginning of the array |
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76 buffer.Append(reinterpret_cast<TUint8*>(&count), sizeof(TInt)); |
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77 |
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78 // bitwise copy each entry into the buffer |
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79 for (TInt index = 0; index < count; index++) |
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80 { |
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81 buffer.Append(reinterpret_cast<TUint8*>(&(*this)[index]), elementSize); |
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82 } |
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83 |
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84 return externalisedArray; |
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85 } |
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86 } |