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/* xbindex.h
Xbase64 project source code
This file contains a header file for the NTX object, which is used
for handling NTX type indices. NTX are the Clipper equivalant of xbNdx
files.
Copyright (C) 1998 SynXis Corp., Bob Cotton
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Contact:
Email:
xdb-devel@lists.sourceforge.net
xdb-users@lists.sourceforge.net
Regular Mail:
XBase Support
149C South Main St
Keller Texas, 76248
USA
*/
#ifndef __XB_INDEX_H__
#define __XB_INDEX_H__
#ifdef __GNU LesserG__
#pragma interface
#endif
#include <xbase64/xbase64.h>
#include <string.h>
/*! \file xbindex.h
*/
#define XB_UNIQUE 1
#define XB_NOT_UNIQUE 0
//! xbIndex class
/*!
*/
class XBDLLEXPORT xbIndex: protected xbFile
{
public:
xbIndex() {}
xbIndex(xbDbf *);
virtual ~xbIndex();
xbShort OpenIndex ( const char * );
xbShort CloseIndex();
virtual xbShort CreateIndex( const char *, const char *, xbShort, xbShort ) = 0;
virtual xbLong GetTotalNodes() = 0;
virtual xbULong GetCurDbfRec() = 0;
virtual xbShort CreateKey( xbShort, xbShort ) = 0;
virtual xbShort GetCurrentKey(char *key) = 0;
virtual xbShort AddKey( xbLong ) = 0;
virtual xbShort UniqueIndex() = 0;
virtual xbShort DeleteKey( xbLong ) = 0;
virtual xbShort KeyWasChanged() = 0;
virtual xbShort FindKey( const char * ) = 0;
virtual xbShort FindKey() = 0;
virtual xbShort FindKey( xbDouble ) = 0;
virtual xbShort GetNextKey() = 0;
virtual xbShort GetLastKey() = 0;
virtual xbShort GetFirstKey() = 0;
virtual xbShort GetPrevKey() = 0;
virtual xbShort ReIndex(void (*statusFunc)(xbLong itemNum, xbLong numItems) = 0) = 0;
// virtual xbShort KeyExists( char * Key ) { return FindKey( Key, strlen( Key ), 0 ); }
virtual xbShort KeyExists( xbDouble ) = 0;
virtual xbShort TouchIndex() { return XB_NO_ERROR; }
virtual void SetNodeSize(xbShort size) {}
virtual xbShort GetNodeSize() { return NodeSize; }
virtual void GetExpression(char *buf, int len) = 0;
virtual void Flush();
virtual const char * GetIxName() {return GetFileName().getData();}
xbShort AllocKeyBufs();
xbBool IsOpen() {return indexfp!=NULL;}
#ifdef XBASE_DEBUG
virtual void DumpHdrNode( xbShort Option ) = 0;
virtual void DumpNodeRec( xbLong ) = 0;
virtual void DumpNodeChain() = 0;
virtual xbShort CheckIndexIntegrity( xbShort ) = 0;
#endif
#ifdef XB_LOCKING_ON
// xbShort LockIndex( xbShort LockType );
// virtual xbShort LockIndex( const xbShort, const xbShort );
#else
// virtual xbShort LockIndex( const xbShort, const xbShort ) const { return XB_NO_ERROR; }
#endif
protected:
virtual xbShort GetHeadNode()=0;
virtual xbUShort GetKeyLen()=0;
virtual const char* GetKeyExpression()=0;
virtual void FreeNodesMemory()=0;
xbIndex *index;
xbDbf *dbf;
xbExpn *IxExp; /* index expression defines keys */
FILE *indexfp;
/* NULL = closed, other = open */
// int IndexStatus; /* old - 0 = closed, 1 = open */
xbULong CurDbfRec; /* current Dbf record number */
char *KeyBuf; /* work area key buffer */
char *KeyBuf2; /* work area key buffer */
xbShort NodeSize;
#ifdef XB_LOCKING_ON
int LockCnt; /* current index lock count */
int CurLockCount; /* old locking field */
int CurLockType; /* old locking field */
#endif
};
#endif /* __XB_INDEX_H__ */
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