--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/userlibandfileserver/fileserver/sfat32/sl_cache.inl	Mon Dec 21 16:14:42 2009 +0000
@@ -0,0 +1,106 @@
+// Copyright (c) 1996-2009 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\sfat32\inc\sl_cache.inl
+// 
+//
+
+/**
+ @file
+ @internalTechnology
+*/
+
+#ifndef SL_CACHE_INL
+#define SL_CACHE_INL
+
+
+/**
+    @param  aPos media linear position
+    @return ETrue if the aPos belongs to this page
+*/
+TBool CWTCachePage::PosCached(TInt64 aPos) const
+    {
+    return (iValid && aPos >= iStartPos && aPos < iStartPos+PageSize());
+    }
+
+
+/**
+    Calculate data position within cache page relatively to the page beginning.
+    @param  aPos media linear position
+    @return data offset from the beginning of the page
+*/
+TUint32 CWTCachePage::PosInCachePage(TInt64 aPos) const 
+    { 
+    return ((TUint32)aPos - (TUint32)iStartPos) & (PageSize()-1);
+    }
+
+/**
+    Obtain pointer to the data in the cache page by media inear position
+    @param  aPos media linear position
+    @return pointer to the data in page buffer
+*/
+TUint8* CWTCachePage::PtrInCachePage(TInt64 aPos) const 
+    { 
+    return (TUint8*)iData.Ptr() + PosInCachePage(aPos);
+    }
+
+/**
+    @return cache page size in bytes
+*/
+TUint32 CWTCachePage::PageSize() const 
+    {
+    return iData.Size();
+    }  
+
+//---------------------------------------------------------------------------------------------------------------------------------
+
+
+/**
+    Just helper method to calculate cache page start position by given media pos.
+    @param  aPos media linear position
+    @return rounded-down and aligned position that is the beginning of the cache page
+*/
+TInt64  CMediaWTCache::CalcPageStartPos(TInt64 aPos) const 
+    { 
+    ASSERT(aPos >= iCacheBasePos);
+    return (((aPos - iCacheBasePos) >> iPageSizeLog2) << iPageSizeLog2) + iCacheBasePos;
+    }
+
+/**
+    @return cache page size
+*/
+TUint32 CMediaWTCache::PageSize() const 
+    {
+    return 1<<iPageSizeLog2;
+    }
+
+
+/**
+    Set cache base position at aBasePos
+    @param  aBasePos  base position of the cache pages. Affects pages alignment.
+*/
+void CMediaWTCache::SetCacheBasePos(TInt64 aBasePos)
+    {
+    iCacheBasePos = aBasePos;
+    }
+
+
+
+//---------------------------------------------------------------------------------------------------------------------------------
+
+
+#endif //SL_CACHE_INL
+
+
+
+