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1 // Copyright (c) 2007-2009 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 the License "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 // Description: |
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12 // |
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13 |
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14 /** |
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15 @file |
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16 @internalComponent |
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17 */ |
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18 |
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19 #ifndef USBDESCUTILS_H |
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20 #define USBDESCUTILS_H |
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21 |
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22 #include <d32usbdescriptors.h> |
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23 #include <d32usbdi_errors.h> |
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24 |
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25 inline void UsbDescFault(UsbdiFaults::TUsbDescFaults aFault) |
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26 { |
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27 User::Panic(UsbdiFaults::KUsbDescFaultCat, aFault); |
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28 } |
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29 |
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30 inline void UsbDescPanic(UsbdiPanics::TUsbDescPanics aPanic) |
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31 { |
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32 User::Panic(UsbdiPanics::KUsbDescPanicCat, aPanic); |
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33 } |
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34 |
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35 /** |
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36 Utility function for retrieving a TUint8 from a Little Endian USB descriptor. |
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37 @param aDes The descriptor to parse. |
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38 @param aOffset The offset in the descriptor where to parse. |
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39 @return The TUint8 value parsed. |
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40 */ |
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41 inline TUint8 ParseTUint8(TPtrC8 aDes, TInt aOffset) |
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42 { |
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43 return aDes[aOffset]; |
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44 } |
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45 |
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46 /** |
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47 Utility function for retrieving a TUint16 from a Little Endian USB descriptor. |
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48 @param aDes The descriptor to parse. |
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49 @param aOffset The offset in the descriptor where to parse. |
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50 @return The TUint16 value parsed. |
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51 */ |
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52 inline TUint16 ParseTUint16(TPtrC8 aDes, TInt aOffset) |
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53 { |
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54 return ((TUint16)aDes[aOffset]) | ( ((TUint16)aDes[aOffset+1]) << 8 ); |
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55 } |
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56 |
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57 /** |
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58 Utility function for retrieving a TUint32 from a Little Endian USB descriptor. |
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59 @param aDes The descriptor to parse. |
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60 @param aOffset The offset in the descriptor where to parse. |
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61 @return The TUint32 value parsed. |
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62 */ |
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63 inline TUint32 ParseTUint32(TPtrC8 aDes, TInt aOffset) |
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64 { |
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65 // Put enough brackets to ensure that all casting is correct |
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66 // and the expression looks symmetrical |
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67 return ( ((TUint32)(aDes[aOffset])) ) | |
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68 ( ((TUint32)(aDes[aOffset + 1])) << 8 ) | |
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69 ( ((TUint32)(aDes[aOffset + 2])) << 16 ) | |
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70 ( ((TUint32)(aDes[aOffset + 3])) << 24 ); |
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71 } |
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72 |
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73 /** |
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74 A utility class to store the custom descriptor parsers. |
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75 The USBDI descriptor parsing framework creates and stores an instance |
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76 of this class in TLS when a custom parse is registered. |
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77 */ |
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78 NONSHARABLE_CLASS(CUsbCustomDescriptorParserList) : public CBase |
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79 { |
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80 public: |
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81 static CUsbCustomDescriptorParserList* NewL(); |
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82 ~CUsbCustomDescriptorParserList(); |
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83 |
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84 void RegisterParserL(UsbDescriptorParser::TUsbDescriptorParserL aParserFunc); |
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85 void UnregisterParser(UsbDescriptorParser::TUsbDescriptorParserL aParserFunc); |
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86 TInt NumOfRegisteredParsers() const; |
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87 UsbDescriptorParser::TUsbDescriptorParserL RegisteredParser(TInt aIndex) const; |
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88 |
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89 private: |
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90 RArray<UsbDescriptorParser::TUsbDescriptorParserL> iParserList; |
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91 }; |
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92 |
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93 |
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94 #endif // USBDESCUTILS_H |