CrystalSpace

Public API Reference

csutil/parasiticdatabuffer.h

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00001 /*
00002     Copyright (C) 2005 by Jorrit Tyberghein
00003               (C) 2005 by Frank Richter
00004 
00005     This library is free software; you can redistribute it and/or
00006     modify it under the terms of the GNU Library General Public
00007     License as published by the Free Software Foundation; either
00008     version 2 of the License, or (at your option) any later version.
00009 
00010     This library is distributed in the hope that it will be useful,
00011     but WITHOUT ANY WARRANTY; without even the implied warranty of
00012     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013     Library General Public License for more details.
00014 
00015     You should have received a copy of the GNU Library General Public
00016     License along with this library; if not, write to the Free
00017     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00018 */
00019 
00024 #ifndef __CS_CSUTIL_PARASITICDATABUFFER_H__
00025 #define __CS_CSUTIL_PARASITICDATABUFFER_H__
00026 
00027 #include "csextern.h"
00028 #include "csutil/pooledscfclass.h"
00029 #include "csutil/scf_implementation.h"
00030 #include "iutil/databuff.h"
00031 
00035 class csParasiticDataBufferBase : 
00036   public scfImplementation1<csParasiticDataBufferBase, iDataBuffer>
00037 {
00038 protected:
00039   csRef<iDataBuffer> parentBuffer;
00040   uint8* data;
00041   size_t size;
00042   
00043   void SetContents (iDataBuffer* parent, size_t offs, size_t size)
00044   {
00045     parentBuffer = parent;
00046     data = parent->GetUint8 () + offs;
00047     size_t parRemaining = parent->GetSize () - offs;
00048     if (size == (size_t)~0)
00049       csParasiticDataBufferBase::size = parRemaining;
00050     else
00051       csParasiticDataBufferBase::size = MIN(size, parRemaining);
00052   }
00053 
00054   csParasiticDataBufferBase (iDataBuffer* parent, size_t offs, 
00055     size_t size = (size_t)~0) : scfImplementationType (this)
00056   {
00057     SetContents (parent, offs, size);
00058   }
00059 
00060   csParasiticDataBufferBase () 
00061     : scfImplementationType (this), data(0), size(0) 
00062   {}
00063 public:
00064   virtual ~csParasiticDataBufferBase () { }
00065 
00066   virtual size_t GetSize () const
00067   { return size; }
00068   virtual char* GetData () const
00069   { return (char*)data; }
00070   inline char *operator * () const
00071   { return (char *)GetData (); }
00072   inline int8* GetInt8 ()
00073   { return (int8 *)GetData (); }
00074   inline uint8* GetUint8 ()
00075   { return (uint8 *)GetData (); }
00076 };
00077 
00081 class csParasiticDataBuffer
00082   : public scfImplementationExt0<csParasiticDataBuffer,
00083         csParasiticDataBufferBase>
00084 {
00085 public:
00094   csParasiticDataBuffer (iDataBuffer* parent, size_t offs,
00095     size_t size = (size_t)~0) 
00096     : scfImplementationType (this, parent, offs, size)
00097   {
00098   }
00099 
00100   virtual ~csParasiticDataBuffer ()
00101   {
00102   }
00103 };
00104 
00116 class csParasiticDataBufferPooled : 
00117   public scfImplementationPooled<
00118     scfImplementationExt0<csParasiticDataBufferPooled, 
00119                           csParasiticDataBufferBase> >
00120 {
00121 public:
00130   csParasiticDataBufferPooled (iDataBuffer* parent, size_t offs,
00131     size_t size = (size_t)~0) : scfPooledImplementationType (this, parent,
00132     offs, size) { }
00133 };
00134 
00135 #endif // __CS_CSUTIL_PARASITICDATABUFFER_H__

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