include/tools/cachestr.hxx

   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 #ifndef _CACHESTR_HXX
  20 #define _CACHESTR_HXX
  21
  22 #include <tools/stream.hxx>
  23 #include <tools/string.hxx>
  24 #include "tools/toolsdllapi.h"
  25
  26 class TempFile;
  27
  28 class TOOLS_DLLPUBLIC SvCacheStream : public SvStream
  29 {
  30 private:
  31     String          aFileName;
  32     sal_uIntPtr     nMaxSize;
  33     int             bPersistent;
  34
  35     SvStream*       pSwapStream;
  36     SvStream*       pCurrentStream;
  37     TempFile*       pTempFile;
  38
  39     TOOLS_DLLPRIVATE virtual sal_uIntPtr GetData( void* pData,
  40                                                   sal_uIntPtr nSize );
  41     TOOLS_DLLPRIVATE virtual sal_uIntPtr PutData( const void* pData,
  42                                                   sal_uIntPtr nSize );
  43     TOOLS_DLLPRIVATE virtual sal_uIntPtr SeekPos( sal_uIntPtr nPos );
  44     TOOLS_DLLPRIVATE virtual void FlushData();
  45     TOOLS_DLLPRIVATE virtual void SetSize( sal_uIntPtr nSize );
  46
  47 public:
  48                     SvCacheStream( sal_uIntPtr nMaxMemSize = 0 );
  49                     ~SvCacheStream();
  50
  51     void            SetFilename( const String& rFN )
  52                  { aFileName = rFN; } // call only from FilenameHdl
  53     const String&   GetFilename() const { return aFileName; }
  54
  55     void            SwapOut();
  56     const void*     GetBuffer();
  57     sal_uIntPtr     GetSize();
  58
  59     sal_Bool        IsPersistent() { return bPersistent != 0; }
  60     void            SetPersistence( sal_Bool b = sal_True ) { bPersistent = b; }
  61     void            SetSwapStream( SvStream *p )
  62                  { pSwapStream = p; } // call only from FilenameHdl
  63 };
  64
  65 #endif
  66
  67 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */