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Diffstat (limited to 'xbase64/xbindex.h')
| -rwxr-xr-x | xbase64/xbindex.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/xbase64/xbindex.h b/xbase64/xbindex.h new file mode 100755 index 0000000..69f55dc --- /dev/null +++ b/xbase64/xbindex.h @@ -0,0 +1,137 @@ +/* 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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