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