LCOV - code coverage report
Current view: top level - sot/source/sdstor - stgcache.hxx (source / functions) Hit Total Coverage
Test: libreoffice_filtered.info Lines: 16 16 100.0 %
Date: 2012-08-25 Functions: 12 12 100.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 3 4 75.0 %

           Branch data     Line data    Source code
       1                 :            : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2                 :            : /*
       3                 :            :  * This file is part of the LibreOffice project.
       4                 :            :  *
       5                 :            :  * This Source Code Form is subject to the terms of the Mozilla Public
       6                 :            :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7                 :            :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8                 :            :  *
       9                 :            :  * This file incorporates work covered by the following license notice:
      10                 :            :  *
      11                 :            :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12                 :            :  *   contributor license agreements. See the NOTICE file distributed
      13                 :            :  *   with this work for additional information regarding copyright
      14                 :            :  *   ownership. The ASF licenses this file to you under the Apache
      15                 :            :  *   License, Version 2.0 (the "License"); you may not use this file
      16                 :            :  *   except in compliance with the License. You may obtain a copy of
      17                 :            :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18                 :            :  */
      19                 :            : 
      20                 :            : #ifndef _STGCACHE_HXX
      21                 :            : #define _STGCACHE_HXX
      22                 :            : 
      23                 :            : #include <osl/endian.h>
      24                 :            : #include <tools/solar.h>
      25                 :            : #include <tools/stream.hxx>
      26                 :            : #include <stgelem.hxx>
      27                 :            : 
      28                 :            : class UCBStorageStream;
      29                 :            : 
      30                 :            : class StgPage;
      31                 :            : class StgDirEntry;
      32                 :            : class StorageBase;
      33                 :            : 
      34                 :            : class StgCache {
      35                 :            :     StgPage* pCur;                          // top of LRU list
      36                 :            :     StgPage* pElem1;                        // top of ordered list
      37                 :            :     sal_uLong nError;                           // error code
      38                 :            :     sal_Int32 nPages;                           // size of data area in pages
      39                 :            :     sal_uInt16 nRef;                            // reference count
      40                 :            :     void * pLRUCache;                       // hash table of cached objects
      41                 :            :     short nPageSize;                        // page size of the file
      42                 :            :     UCBStorageStream* pStorageStream;       // holds reference to UCB storage stream
      43                 :            : 
      44                 :            :     void Erase( StgPage* );                 // delete a cache element
      45                 :            :     void InsertToLRU( StgPage* );           // insert into LRU list
      46                 :            :     void InsertToOrdered( StgPage* );       // insert into ordered list
      47                 :            :     StgPage* Create( sal_Int32 );               // create a cached page
      48                 :            : protected:
      49                 :            :     SvStream* pStrm;                        // physical stream
      50                 :            :     sal_Bool  bMyStream;                        // sal_True: delete stream in dtor
      51                 :            :     sal_Bool  bFile;                            // sal_True: file stream
      52                 :            :     sal_Int32 Page2Pos( sal_Int32 );                // page address --> file position
      53                 :            : public:
      54                 :            :     StgCache();
      55                 :            :     ~StgCache();
      56                 :       3836 :     void  IncRef()                      { nRef++;           }
      57                 :       3830 :     sal_uInt16 DecRef()                     { return --nRef;    }
      58                 :            :     void  SetPhysPageSize( short );
      59                 :      13236 :     sal_Int32 GetPhysPages()                { return nPages;    }
      60                 :      11200 :     short GetPhysPageSize()             { return nPageSize; }
      61                 :       1848 :     SvStream* GetStrm()                 { return pStrm;     }
      62                 :            :     void  SetStrm( SvStream*, sal_Bool );
      63                 :            :     void  SetStrm( UCBStorageStream* );
      64                 :            :     sal_Bool  IsWritable()                  { return ( pStrm && pStrm->IsWritable() ); }
      65                 :      57404 :     sal_Bool  Good()                        { return sal_Bool( nError == SVSTREAM_OK ); }
      66                 :            :     sal_Bool  Bad()                         { return sal_Bool( nError != SVSTREAM_OK ); }
      67                 :        734 :     sal_uLong GetError()                    { return nError;    }
      68                 :            :     void  MoveError( StorageBase& );
      69                 :            :     void  SetError( sal_uLong );
      70                 :            :     void  ResetError();
      71                 :            :     sal_Bool  Open( const String& rName, StreamMode );
      72                 :            :     void  Close();
      73                 :            :     sal_Bool  Read( sal_Int32 nPage, void* pBuf, sal_Int32 nPages );
      74                 :            :     sal_Bool  Write( sal_Int32 nPage, void* pBuf, sal_Int32 nPages );
      75                 :            :     sal_Bool  SetSize( sal_Int32 nPages );
      76                 :            :     StgPage* Find( sal_Int32 );                 // find a cached page
      77                 :            :     StgPage* Get( sal_Int32, sal_Bool );            // get a cached page
      78                 :            :     StgPage* Copy( sal_Int32, sal_Int32=STG_FREE ); // copy a page
      79                 :            :     sal_Bool Commit(); // flush all pages
      80                 :            :     void Clear();                           // clear the cache
      81                 :            : };
      82                 :            : 
      83                 :            : class StgPage {
      84                 :            :     friend class StgCache;
      85                 :            :     StgCache* pCache;                       // the cache
      86                 :            :     StgPage *pNext1, *pLast1;               // LRU chain
      87                 :            :     StgPage *pNext2, *pLast2;               // ordered chain
      88                 :            :     StgDirEntry* pOwner;                    // owner
      89                 :            :     sal_Int32   nPage;                          // page #
      90                 :            :     sal_uInt8*  pData;                          // nPageSize characters
      91                 :            :     short   nData;                          // size of this page
      92                 :            :     sal_Bool    bDirty;                         // dirty flag
      93                 :            :     StgPage( StgCache*, short );
      94                 :            :     ~StgPage();
      95                 :            : public:
      96                 :      16745 :     void  SetDirty()                    { bDirty = sal_True;            }
      97                 :            :     sal_Int32 GetPage()                     { return nPage;             }
      98                 :    2208539 :     void* GetData()                     { return pData;             }
      99                 :       4482 :     short GetSize()                     { return nData;             }
     100                 :    2208539 :     void  SetOwner( StgDirEntry* p )    { pOwner = p;               }
     101                 :            :     // routines for accessing FAT pages
     102                 :            :     // Assume that the data is a FAT page and get/put FAT data.
     103                 :     370151 :     sal_Int32 GetPage( short nOff )
     104                 :            :     {
     105 [ +  + ][ -  + ]:     370151 :         if( ( nOff >= (short) ( nData / sizeof( sal_Int32 ) ) ) || nOff < 0 )
     106                 :          3 :             return -1;
     107                 :     370148 :         sal_Int32 n = ((sal_Int32*) pData )[ nOff ];
     108                 :            : #ifdef OSL_BIGENDIAN
     109                 :            :         return OSL_SWAPDWORD(n);
     110                 :            : #else
     111                 :     370151 :         return n;
     112                 :            : #endif
     113                 :            :     }
     114                 :            :     void  SetPage( short, sal_Int32 );      // put an element
     115                 :            : };
     116                 :            : 
     117                 :            : #endif
     118                 :            : 
     119                 :            : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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