// Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).

 // All rights reserved.

 // This component and the accompanying materials are made available

 // under the terms of the License "Eclipse Public License v1.0"

 // which accompanies this distribution, and is available

 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

 //

 // Initial Contributors:

 // Nokia Corporation - initial contribution.

 //

 // Contributors:

 //

 // Description:

 // f32\sfat\sl_fatcache.inl

 // 

 //

 /**

  @file

 */

 //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 //!!

 //!! WARNING!! DO NOT edit this file !! '\sfat' component is obsolete and is not being used. '\sfat32'replaces it

 //!!

 //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 #ifndef SL_FAT_CACHE_INL

 #define SL_FAT_CACHE_INL

 //-----------------------------------------------------------------------------

 /** clear all bits */

 void T32Bits::Clear()

     {

     iData = 0;

     }

 /** @return non-0 if at least one of 32 bits is set to '1' */

 TBool T32Bits::HasBitsSet() const 

     {

     return iData;

     } 

 /** sets bit number "aIndex" to '1' */

 void T32Bits::SetBit(TUint32 aIndex)

     {

     ASSERT(aIndex < 32);

     iData |= (1<<aIndex);

     }

 /** 

     Get value of the bit number "aIndex". 

     @return 0 if the bit aIndex is '0' non-zero otherwise

 */

 TBool T32Bits::operator[](TUint32 aIndex) const

     {

     ASSERT(aIndex < 32);

     return (iData & (1<<aIndex));

     }

 //-----------------------------------------------------------------------------

 TUint32 CFatCacheBase::FatStartPos() const 

     {

     return iFatStartPos;

     }

 TUint32 CFatCacheBase::FatSize() const 

     {

     return iFatSize;

     }

 TFatType CFatCacheBase::FatType() const 

     {

     return iFatType;

     }

 TBool CFatCacheBase::IsDirty() const 

     {

     return iDirty;

     }

 void CFatCacheBase::SetDirty(TBool aDirty) 

     {

     iDirty = aDirty;

     }

 TUint CFatCacheBase::NumFATs() const 

     {

     return iNumFATs;

     }

 TUint CFatCacheBase::FAT_SectorSzLog2() const 

     {

     return iFatSecSzLog2;

     }

 TUint CFatCacheBase::FAT_SectorSz() const 

     {

     return 1 << iFatSecSzLog2;

     }

 TUint CFatCacheBase::FAT_ClusterSzLog2() const 

     {

     return iFatClustSzLog2;

     }

 //-----------------------------------------------------------------------------

 /** @return number of FAT cache sectors in this fixed cache */

 TUint32 CFat12Cache::NumSectors() const   

     {

     return iSectorsInCache;

     }

 //-----------------------------------------------------------------------------

 /** @return Log2(page size in bytes) */

 TUint CFatPagedCacheBase::PageSizeLog2() const 

     {

     return iPageSizeLog2;

     }

 /** @return page size in bytes */

 TUint CFatPagedCacheBase::PageSize() const 

     {

     return Pow2(iPageSizeLog2);

     }

 /** @return Log2(size of the logical sector of the page in bytes) */    

 TUint CFatPagedCacheBase::SectorSizeLog2() const 

     {

     return iSectorSizeLog2;

     }

 /** @return number of the logical sector in the page */

 TUint CFatPagedCacheBase::SectorsInPage() const 

     {

     return Pow2(iPageSizeLog2 - iSectorSizeLog2);

     }

 //-----------------------------------------------------------------------------

 TUint CFat16FixedCache::NumPages() const 

     {

     return (TUint)iPages.Count();

     } 

 //-----------------------------------------------------------------------------

 /** @return  the index in the FAT table this page starts from */

 TUint32 CFatCachePageBase::StartFatIndex() const 

     {

     return iStartIndexInFAT;

     }

 /** @return number of FAT entries in the page */

 TUint32 CFatCachePageBase::EntriesInPage() const 

     {

     return iFatEntriesInPage;

     }

 /** @return page state */

 CFatCachePageBase::TState CFatCachePageBase::State() const

     {

     return iState;

     }

 /** sets the state of the page */

 void CFatCachePageBase::SetState(TState aState)

     {

     iState = aState;

     }

 /** @return ETrue if the page is dirty, i.e. contains non-flushed dirty sectors */

 TBool CFatCachePageBase::IsDirty() const

     {

     if(State() == EDirty)

         {

         ASSERT(iDirtySectors.HasBitsSet());

         return ETrue;

         }

     else

         {

         ASSERT(!iDirtySectors.HasBitsSet());

         return EFalse;

         }

     }

 /** @return  ETrue if the page data are valid */

 TBool CFatCachePageBase::IsValid() const

     {

     return (State() == EClean || State() == EDirty);

     }

 /** force the page to the clean state */

 void CFatCachePageBase::SetClean()

     {

     iDirtySectors.Clear(); //-- clear dirty sectors bitmap

     SetState(EClean);

     }

 /** @return page size in bytes */

 TUint32 CFatCachePageBase::PageSize() const 

     {

     return iCache.PageSize();

     }

 /** @return number of logical sectors in the page */

 TUint32 CFatCachePageBase::NumSectors() const 

     {

     return iCache.SectorsInPage();

     }

 /** @return ETrue if the entry at aFatIndex belongs to this page */

 TBool CFatCachePageBase::IsEntryCached(TUint32 aFatIndex) const

     {

     return (aFatIndex >= iStartIndexInFAT && aFatIndex < iStartIndexInFAT+EntriesInPage());

     } 

 //---------------------------------------------------------------------------------------------------------------------------------

 #endif //SL_FAT_CACHE_INL