1 files changed, 119 insertions, 0 deletions
diff --git a/khexedit/lib/kbigbuffer.h b/khexedit/lib/kbigbuffer.h
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+++ b/khexedit/lib/kbigbuffer.h
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+/***************************************************************************
+                          kbigbuffer.h  -  description
+                             -------------------
+    begin                : Mit Jun 02 2003
+    copyright            : (C) 2003 by Friedrich W. H. Kossebau
+    email                : Friedrich.W.H@Kossebau.de
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This library is free software; you can redistribute it and/or         *
+ *   modify it under the terms of the GNU Library General Public           *
+ *   License version 2 as published by the Free Software Foundation.       *
+ *                                                                         *
+ ***************************************************************************/
+
+
+#ifndef KHE_KBIGBUFFER_H
+#define KHE_KBIGBUFFER_H
+
+// qt specific
+#include <qvaluevector.h>
+#include <qfile.h>
+// lib specific
+#include "kdatabuffer.h"
+#include "khexedit_export.h"
+
+namespace KHE {
+
+/** base class for all Data buffers that are used to display
+  * TODO: think about a way to inform KHexEdit that there has been
+  * a change in the buffer outside. what kind of changes are possible?
+  *@author Friedrich W. H. Kossebau
+  */
+
+class KHEXEDIT_EXPORT KBigBuffer : public KDataBuffer
+{
+    typedef QValueVector<char *> KPageOfChar;
+
+  public:
+    /** default is only 50*4k = 200k memory image */
+    KBigBuffer( int NP = 50, int PS = 4096 );
+    virtual ~KBigBuffer();
+
+  public: // KDataBuffer API
+    virtual bool prepareRange( KSection Range ) const;
+    virtual const char *dataSet( KSection S ) const;
+    virtual char datum( unsigned int Offset ) const;
+    virtual int size() const;
+    virtual bool isReadOnly() const;
+    virtual bool isModified() const;
+
+    virtual int insert( int Pos, const char*, int Length );
+    virtual int remove( KSection S );
+    virtual unsigned int replace( KSection S, const char*, unsigned int InputLength );
+    virtual int move( int DestPos, KSection SourceSection );
+    virtual int fill( char FillChar, int Length = -1, unsigned int Pos = 0 );
+    virtual void setDatum( unsigned int Offset, const char Char );
+
+    virtual void setModified( bool M = true );
+
+    //virtual int find( const char*, int Length, int Pos = 0 ) const;
+    virtual int find( const char*KeyData, int Length, KSection Section ) const;
+    virtual int rfind( const char*, int Length, int Pos = -1 ) const;
+
+/*     virtual int find( const QString &expr, bool cs, bool wo, bool forward = true, int *index = 0 ); */
+
+  public:
+    void setReadOnly( bool RO = true );
+    bool isOpen() const;
+    bool open (const QString& filename );
+    bool close();
+
+  protected:
+    bool ensurePageLoaded( unsigned int PageIndex ) const;
+    bool freePage( unsigned int PageIndex ) const;
+
+
+  protected:
+    /** */
+    mutable QFile File;
+    /**  */
+    bool ReadOnly:1;
+    bool IsOpen:1;
+    bool AtEOF:1;
+    /** maximum number of pages which could be currently loaded */
+    unsigned int NoOfUsedPages;
+    /**  number of actually not used pages (in terms of NoOfUsedPages) */
+    mutable int NoOfFreePages;
+    /** number of bytes in a page */
+    unsigned int PageSize;
+    /** first currently loaded page */
+    mutable int FirstPage;
+    /** last currently loaded page */
+    mutable int LastPage;
+    /** */
+    mutable KPageOfChar Data;
+    /** */
+    unsigned int Size;
+
+    /** current offset */
+    mutable unsigned int OffsetOfActualPage;
+    /** points to the actual page */
+    mutable char* ActualPage;
+};
+
+inline int KBigBuffer::size()        const   { return Size; }
+inline bool KBigBuffer::isReadOnly() const   { return ReadOnly; }
+inline bool KBigBuffer::isModified() const   { return false; }
+inline void KBigBuffer::setReadOnly( bool RO ) { ReadOnly = RO; }
+inline void KBigBuffer::setModified( bool )  {}
+
+inline void KBigBuffer::setDatum( unsigned int, const char )  {}
+
+inline bool KBigBuffer::isOpen() const { return File.isOpen(); }
+
+}
+
+#endif