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 "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 /** |
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17 @file |
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18 @internalComponent |
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19 @released |
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20 */ |
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21 |
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22 #include "eventsmask.h" |
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23 |
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24 #ifdef _DEBUG |
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25 _LIT(KEventsMask, "TEventsMask"); |
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26 #endif |
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27 |
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28 TEventsMask::TEventsMask () |
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29 { |
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30 Reset(); |
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31 } |
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32 |
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33 void TEventsMask::Reset() |
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34 { |
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35 iMask = 0x0000; |
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36 iNextSupportedEvent = 0x00; |
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37 } |
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38 |
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39 TBool TEventsMask::Find(TRegisterNotificationEvent aEvent) const |
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40 { |
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41 return ( (0x0001 << (aEvent -1)) & iMask ) ? ETrue : EFalse; |
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42 } |
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43 |
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44 void TEventsMask::Append(TRegisterNotificationEvent aEvent) |
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45 { |
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46 // the assertion assures that aEvent is a valid argument (in the range) |
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47 __ASSERT_DEBUG((aEvent >= ERegisterNotificationPlaybackStatusChanged) && |
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48 (aEvent < ERegisterNotificationReservedLast), |
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49 User::Panic(KEventsMask, KErrArgument)); |
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50 |
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51 iMask |= (0x0001 << (aEvent -1)); |
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52 } |
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53 |
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54 void TEventsMask::Remove(TRegisterNotificationEvent aEvent) |
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55 { |
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56 // the assertion assures that aEvent is a valid argument (in the range) |
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57 __ASSERT_DEBUG((aEvent >= ERegisterNotificationPlaybackStatusChanged) && |
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58 (aEvent < ERegisterNotificationReservedLast), |
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59 User::Panic(KEventsMask, KErrArgument)); |
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60 |
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61 iMask &= ~(0x0001 << (aEvent -1)); |
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62 } |
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63 |
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64 void TEventsMask::Begin() |
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65 { |
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66 iNextSupportedEvent = 0x00; |
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67 } |
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68 |
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69 TBool TEventsMask::Next() |
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70 { |
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71 TUint index = iNextSupportedEvent+1; |
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72 |
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73 if (index == ERegisterNotificationReservedLast) |
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74 { |
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75 return EFalse; |
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76 } |
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77 |
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78 while( (!Find((TRegisterNotificationEvent)index)) && (index < ERegisterNotificationReservedLast) ) |
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79 { |
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80 index++; |
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81 } |
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82 |
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83 if (index < ERegisterNotificationReservedLast) |
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84 { |
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85 iNextSupportedEvent = index; |
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86 return ETrue; |
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87 } |
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88 else |
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89 { |
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90 return EFalse; |
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91 } |
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92 } |
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93 |
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94 TRegisterNotificationEvent TEventsMask::Get() const |
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95 { |
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96 // if Get() is called before calling Begin() and at least one call to Next() |
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97 // it Panics because iNextSupportedEvent is invalid (equals to 0x00). |
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98 __ASSERT_DEBUG(iNextSupportedEvent >= ERegisterNotificationPlaybackStatusChanged, User::Panic(KEventsMask, KErrUnderflow)); |
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99 // this should never happen, it would mean that iNextSupport overtakes the |
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100 // last valid value |
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101 __ASSERT_DEBUG(iNextSupportedEvent < ERegisterNotificationReservedLast, User::Panic(KEventsMask, KErrOverflow)); |
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102 |
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103 return static_cast<TRegisterNotificationEvent>(iNextSupportedEvent); |
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104 } |
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