da6f8a212c
* harbour/include/hbrddntx.h
! fixed type of Signature field in tag structure
* harbour/source/rdd/dbfntx/dbfntx1.c
! fixed possible leaving locked index when number of tags
exceed 63. 63 is maximum number of tags in multi tag NTX
file
! fixed typo in HB_TRACE message
% simplify NTXNODE data access in RDDINFO method
* harbour/source/rdd/dbfcdx/dbfcdx1.c
* formatting, some minor cleanup and fixed typo in comment
556 lines
20 KiB
C
556 lines
20 KiB
C
/*
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* $Id$
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*/
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/*
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* Harbour Project source code:
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* DBFNTX RDD
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*
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* Copyright 2000 Alexander Kresin <alex@belacy.belgorod.su>
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* www - http://www.harbour-project.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
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*
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* As a special exception, the Harbour Project gives permission for
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* additional uses of the text contained in its release of Harbour.
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*
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* The exception is that, if you link the Harbour libraries with other
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* files to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the Harbour library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the Harbour
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* Project under the name Harbour. If you copy code from other
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* Harbour Project or Free Software Foundation releases into a copy of
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* Harbour, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for Harbour, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice.
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*
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*/
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#ifndef HB_RDDNTX_H_
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#define HB_RDDNTX_H_
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#include "hbapirdd.h"
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#include "hbdbferr.h"
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#define HB_EXTERNAL_RDDDBF_USE
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#include "hbrdddbf.h"
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HB_EXTERN_BEGIN
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/* DBFNTX default extensions */
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#define NTX_INDEXEXT ".ntx"
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/* DBFNTX constants declarations */
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#define NTX_IGNORE_REC_NUM 0x0UL
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#define NTX_MAX_REC_NUM 0xFFFFFFFFUL
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#define NTX_DUMMYNODE 0xFFFFFFFFUL
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#define NTX_FLAG_DEFALUT 0x0006
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#define NTX_FLAG_OLDDEFALUT 0x0003
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#define NTX_FLAG_FORITEM 0x0001
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#define NTX_FLAG_PARTIAL 0x0008
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#define NTX_FLAG_EXTLOCK 0x0010
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#define NTX_FLAG_CUSTOM 0x0020
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#define NTX_FLAG_CHGONLY 0x0040
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#define NTX_FLAG_TEMPLATE 0x0080
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#define NTX_FLAG_SORTRECNO 0x0100
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#define NTX_FLAG_LARGEFILE 0x0200
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#define NTX_FLAG_MULTIKEY 0x0400
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#define NTX_FLAG_COMPOUND 0x8000
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#define NTX_FLAG_MASK 0x87FF
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#define CTX_MAX_TAGS 63
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#define NTX_MAX_KEY 256 /* Max len of key */
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#define NTX_MAX_EXP 256 /* Max len of KEY/FOR expression */
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#define NTXBLOCKBITS 10 /* Size of NTX block in bits */
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#define NTXBLOCKSIZE (1<<NTXBLOCKBITS) /* Size of block in NTX file */
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#define NTX_MAX_TAGNAME 10 /* Max len of tag name */
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#define NTX_TAGITEMSIZE 16 /* Size of tag item in CTX header */
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#define NTX_HDR_UNUSED 473 /* the unused part of header */
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#define NTX_PAGES_PER_TAG 8
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#define NTX_STACKSIZE 32 /* Maximum page stack size */
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/* index file structures - defined as BYTEs to avoid alignment problems */
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typedef struct _NTXHEADER /* Header of NTX file */
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{
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BYTE type[2];
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BYTE version[2];
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BYTE root[4];
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BYTE next_page[4];
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BYTE item_size[2];
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BYTE key_size[2];
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BYTE key_dec[2];
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BYTE max_item[2];
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BYTE half_page[2];
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BYTE key_expr[ NTX_MAX_EXP ];
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BYTE unique[1];
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BYTE unknown1[1];
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BYTE descend[1];
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BYTE unknown2[1];
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BYTE for_expr[ NTX_MAX_EXP ];
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BYTE tag_name[ NTX_MAX_TAGNAME + 2 ];
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BYTE custom[1];
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BYTE unused[ NTX_HDR_UNUSED ];
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} NTXHEADER;
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typedef NTXHEADER * LPNTXHEADER;
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typedef struct _CTXTAGITEM /* TAG item in compound NTX (CTX) header */
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{
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BYTE tag_name[ NTX_MAX_TAGNAME + 2 ];
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BYTE tag_header[ 4 ];
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} CTXTAGITEM;
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typedef CTXTAGITEM * LPCTXTAGITEM;
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typedef struct _CTXHEADER /* Header of xHarbour CTX file */
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{
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BYTE type[ 2 ]; /* 0x9591 LE */
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BYTE ntags[ 2 ]; /* number of tag entries MAX63 */
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BYTE version[ 4 ]; /* update counter LE */
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BYTE freepage[ 4 ]; /* first free page in index file */
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BYTE filesize[ 4 ]; /* size of index file in pages */
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BYTE tags[ CTX_MAX_TAGS * NTX_TAGITEMSIZE ];
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} CTXHEADER;
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typedef CTXHEADER * LPCTXHEADER;
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#if 0
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/* original CLIP CTX file header - for information only it's binary
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compatible so both RDD can read the same file but it's not safe
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to use CLIP for writing when the file is open by xHarbour.
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In spare time I'll update CLIP to respect my extensions and send
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patches to Rust - hope they will be included in CLIP.
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*/
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typedef struct _CTXHEADER /* Header of CLIP CTX file */
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{
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BYTE type[ 2 ]; /* 0x9591 in LE */
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BYTE ntags[ 1 ]; /* number of tag entries */
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BYTE unused[ 13 ];
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CTX_TAG tags[ 63 ];
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} CTXHEADER
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#endif
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/* forward declarations
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*/
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struct _RDDFUNCS;
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struct _NTXAREA;
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struct _TAGINFO;
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struct _NTXINDEX;
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typedef struct _KEYINFO
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{
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ULONG Tag; /* page number */
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ULONG Xtra; /* record number */
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char key[ 1 ]; /* key value */
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} KEYINFO;
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typedef KEYINFO * LPKEYINFO;
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typedef struct _TREE_STACK
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{
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ULONG page;
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SHORT ikey;
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} TREE_STACK;
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typedef TREE_STACK * LPTREESTACK;
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typedef struct _HB_PAGEINFO
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{
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ULONG Page;
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BOOL Changed;
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int iUsed;
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USHORT uiKeys;
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struct _HB_PAGEINFO * pNext;
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struct _HB_PAGEINFO * pPrev;
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#ifdef HB_NTX_EXTERNAL_PAGEBUFFER
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char * buffer;
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#else
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char buffer[ NTXBLOCKSIZE ];
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#endif
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} HB_PAGEINFO;
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typedef HB_PAGEINFO * LPPAGEINFO;
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typedef struct _HB_NTXSCOPE
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{
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PHB_ITEM scopeItem;
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LPKEYINFO scopeKey;
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USHORT scopeKeyLen;
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} HB_NTXSCOPE;
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typedef HB_NTXSCOPE * PHB_NTXSCOPE;
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typedef struct _TAGINFO
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{
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char * TagName;
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char * KeyExpr;
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char * ForExpr;
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PHB_ITEM pKeyItem;
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PHB_ITEM pForItem;
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HB_NTXSCOPE top;
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HB_NTXSCOPE bottom;
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USHORT Signature;
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BOOL fTagName;
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BOOL fUsrDescend;
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BOOL AscendKey;
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BOOL UniqueKey;
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BOOL Custom;
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BOOL ChgOnly;
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BOOL Partial;
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BOOL Template;
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BOOL MultiKey;
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BOOL fSortRec;
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BOOL HdrChanged;
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BOOL TagBOF;
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BOOL TagEOF;
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ULONG HeadBlock;
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ULONG RootBlock;
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USHORT uiNumber;
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BYTE KeyType;
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USHORT nField;
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USHORT KeyLength;
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USHORT KeyDec;
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USHORT MaxKeys;
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LPTREESTACK stack;
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USHORT stackSize;
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USHORT stackLevel;
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ULONG keyCount;
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LPKEYINFO CurKeyInfo;
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LPKEYINFO HotKeyInfo;
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BOOL HotFor;
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struct _NTXINDEX * Owner;
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} TAGINFO;
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typedef TAGINFO * LPTAGINFO;
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typedef struct _NTXINDEX
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{
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char * IndexName;
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char * RealName;
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ULONG Version; /* The index VERSION filed to signal index updates for other stations */
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ULONG NextAvail;
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ULONG TagBlock; /* Index attr, next free page */
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struct _NTXAREA * Owner;
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FHANDLE DiskFile;
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BOOL fDelete; /* delete on close flag */
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BOOL fReadonly;
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BOOL fShared;
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BOOL fFlush;
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BOOL LargeFile;
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BOOL Changed;
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BOOL Update;
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BOOL Compound;
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BOOL Production; /* Production index */
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HB_FOFFSET ulLockPos; /* readlock position for CL53 lock scheme */
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int lockWrite; /* number of write lock set */
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int lockRead; /* number of read lock set */
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BYTE * HeaderBuff; /* TODO: make it member */
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BOOL fValidHeader;
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int iTags;
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LPTAGINFO * lpTags;
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ULONG ulPages;
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ULONG ulPageLast;
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ULONG ulPagesDepth;
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LPPAGEINFO *pages;
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LPPAGEINFO pChanged;
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LPPAGEINFO pFirst;
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LPPAGEINFO pLast;
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struct _NTXINDEX * pNext; /* The next index in the list */
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} NTXINDEX;
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typedef NTXINDEX * LPNTXINDEX;
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/* for index creation */
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typedef struct
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{
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HB_FOFFSET nOffset; /* offset in temporary file */
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ULONG ulKeys; /* number of keys in page */
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ULONG ulKeyBuf; /* number of keys in memory buffer */
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ULONG ulCurKey; /* current key in memory buffer */
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BYTE * pKeyPool; /* memory buffer */
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} NTXSWAPPAGE;
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typedef NTXSWAPPAGE * LPNTXSWAPPAGE;
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typedef struct
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{
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LPTAGINFO pTag; /* current Tag */
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FHANDLE hTempFile; /* handle to temporary file */
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char * szTempFileName; /* temporary file name */
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int keyLen; /* key length */
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BOOL fUnique; /* TRUE if index is unique */
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BOOL fReindex; /* TRUE if reindexing is in process */
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ULONG ulMaxRec; /* the highest record number */
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ULONG ulTotKeys; /* total number of keys indexed */
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ULONG ulKeys; /* keys in curently created page */
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ULONG ulPages; /* number of pages */
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ULONG ulCurPage; /* current page */
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ULONG ulPgKeys; /* maximum number of key in page memory buffer */
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ULONG ulMaxKey; /* maximum number of keys in single page */
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BYTE * pKeyPool; /* memory buffer for current page then for pages */
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BYTE * pStartKey; /* begining of key pool after sorting */
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LPNTXSWAPPAGE pSwapPage; /* list of pages */
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LPPAGEINFO NodeList[ NTX_STACKSIZE ]; /* Stack of pages */
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ULONG ulFirst;
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ULONG * pSortedPages;
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BYTE pLastKey[ NTX_MAX_KEY ]; /* last key val */
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ULONG ulLastRec;
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BYTE * pBuffIO; /* index IO buffer */
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ULONG ulSizeIO; /* size of IO buffer in index pages */
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ULONG ulPagesIO; /* number of index pages in buffer */
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ULONG ulFirstIO; /* first page in buffer */
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ULONG ulLastIO; /* last page in buffer */
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} NTXSORTINFO;
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typedef NTXSORTINFO * LPNTXSORTINFO;
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/*
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* DBF WORKAREA
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* ------------
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* The Workarea Structure of DBFNTX RDD
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*
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*/
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typedef struct _NTXAREA
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{
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struct _RDDFUNCS * lprfsHost; /* Virtual method table for this workarea */
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USHORT uiArea; /* The number assigned to this workarea */
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void * atomAlias; /* Pointer to the alias symbol for this workarea */
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USHORT uiFieldExtent; /* Total number of fields allocated */
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USHORT uiFieldCount; /* Total number of fields used */
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LPFIELD lpFields; /* Pointer to an array of fields */
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void * lpFieldExtents; /* Void ptr for additional field properties */
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PHB_ITEM valResult; /* All purpose result holder */
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BOOL fTop; /* TRUE if "top" */
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BOOL fBottom; /* TRUE if "bottom" */
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BOOL fBof; /* TRUE if "bof" */
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BOOL fEof; /* TRUE if "eof" */
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BOOL fFound; /* TRUE if "found" */
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DBSCOPEINFO dbsi; /* Info regarding last LOCATE */
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DBFILTERINFO dbfi; /* Filter in effect */
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LPDBORDERCONDINFO lpdbOrdCondInfo;
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LPDBRELINFO lpdbRelations; /* Parent/Child relationships used */
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USHORT uiParents; /* Number of parents for this area */
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USHORT heap;
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USHORT heapSize;
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USHORT rddID;
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USHORT uiMaxFieldNameLength;
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PHB_CODEPAGE cdPage; /* Area's codepage pointer */
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/*
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* DBFS's additions to the workarea structure
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*
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* Warning: The above section MUST match WORKAREA exactly! Any
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* additions to the structure MUST be added below, as in this
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* example.
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*/
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FHANDLE hDataFile; /* Data file handle */
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FHANDLE hMemoFile; /* Memo file handle */
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FHANDLE hMemoTmpFile; /* Memo temporary file handle */
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char * szDataFileName; /* Name of data file */
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char * szMemoFileName; /* Name of memo file */
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USHORT uiHeaderLen; /* Size of header */
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USHORT uiRecordLen; /* Size of record */
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USHORT uiMemoBlockSize; /* Size of memo block */
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USHORT uiNewBlockSize; /* Size of new memo block */
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USHORT uiMemoVersion; /* MEMO file version */
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USHORT uiDirtyRead; /* Index dirty read bit filed */
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BYTE bTableType; /* DBF type */
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BYTE bMemoType; /* MEMO type used in DBF memo fields */
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BYTE bLockType; /* Type of locking shemes */
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BYTE bCryptType; /* Type of used encryption */
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DBFHEADER dbfHeader; /* DBF header buffer */
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USHORT * pFieldOffset; /* Pointer to field offset array */
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BYTE * pRecord; /* Buffer of record data */
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ULONG ulRecCount; /* Total records */
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ULONG ulRecNo; /* Current record */
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BOOL fAutoInc; /* WorkArea with auto increment fields */
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BOOL fHasMemo; /* WorkArea with Memo fields */
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BOOL fHasTags; /* WorkArea with MDX or CDX index */
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BOOL fModStamp; /* WorkArea with modification autoupdate fields */
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BOOL fDataFlush; /* data was written to DBF and not commited */
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BOOL fMemoFlush; /* data was written to MEMO and not commited */
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BOOL fShared; /* Shared file */
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BOOL fReadonly; /* Read only file */
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BOOL fValidBuffer; /* State of buffer */
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BOOL fPositioned; /* Positioned record */
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BOOL fRecordChanged; /* Record changed */
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BOOL fAppend; /* TRUE if new record is added */
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BOOL fDeleted; /* TRUE if record is deleted */
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BOOL fEncrypted; /* TRUE if record is encrypted */
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BOOL fTableEncrypted; /* TRUE if table is encrypted */
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BOOL fUpdateHeader; /* Update header of file */
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BOOL fFLocked; /* TRUE if file is locked */
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BOOL fHeaderLocked; /* TRUE if DBF header is locked */
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BOOL fPackMemo; /* Pack memo file in pack operation */
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BOOL fTrigger; /* Execute trigger function */
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LPDBOPENINFO lpdbOpenInfo; /* Pointer to current dbOpenInfo structure in OPEN/CREATE methods */
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LPDBRELINFO lpdbPendingRel; /* Pointer to parent rel struct */
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ULONG * pLocksPos; /* List of records locked */
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ULONG ulNumLocksPos; /* Number of records locked */
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BYTE * pCryptKey; /* Pointer to encryption key */
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PHB_DYNS pTriggerSym; /* DynSym pointer to trigger function */
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/*
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* NTX's additions to the workarea structure
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*
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* Warning: The above section MUST match DBFAREA exactly! Any
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* additions to the structure MUST be added below, as in this
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* example.
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*/
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BOOL fNtxAppend; /* TRUE if new record is added */
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BOOL fSetTagNumbers; /* Tag number should be recreated */
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LPNTXINDEX lpIndexes; /* Pointer to list of indexes */
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LPTAGINFO lpCurTag; /* Pointer to current order */
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LPNTXSORTINFO pSort; /* Index build structure */
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} NTXAREA;
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typedef NTXAREA * LPNTXAREA;
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#ifndef NTXAREAP
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#define NTXAREAP LPNTXAREA
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#endif
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/*
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* -- DBFNTX METHODS --
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*/
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#define SUPERTABLE ( &ntxSuper )
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#define ntxBof NULL
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#define ntxEof NULL
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#define ntxFound NULL
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static ERRCODE ntxGoBottom( NTXAREAP pArea );
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#define ntxGoTo NULL
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#define ntxGoToId NULL
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static ERRCODE ntxGoTop( NTXAREAP pArea );
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static ERRCODE ntxSeek( NTXAREAP pArea, BOOL bSoftSeek, PHB_ITEM pKey, BOOL bFindLast );
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#define ntxSkip NULL
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#define ntxSkipFilter NULL
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static ERRCODE ntxSkipRaw( NTXAREAP pArea, LONG lToSkip );
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#define ntxAddField NULL
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/* static ERRCODE ntxAppend( NTXAREAP pArea, BOOL bUnLockAll ); */
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#define ntxAppend NULL
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#define ntxCreateFields NULL
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#define ntxDeleteRec NULL
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#define ntxDeleted NULL
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#define ntxFieldCount NULL
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#define ntxFieldDisplay NULL
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#define ntxFieldInfo NULL
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#define ntxFieldName NULL
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static ERRCODE ntxFlush( NTXAREAP pArea );
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#define ntxGetRec NULL
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#define ntxGetValue NULL
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#define ntxGetVarLen NULL
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static ERRCODE ntxGoCold( NTXAREAP pArea );
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static ERRCODE ntxGoHot( NTXAREAP pArea );
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#define ntxPutRec NULL
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#define ntxPutValue NULL
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#define ntxRecall NULL
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#define ntxRecCount NULL
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#define ntxRecInfo NULL
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#define ntxRecNo NULL
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#define ntxRecId NULL
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#define ntxSetFieldsExtent NULL
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#define ntxAlias NULL
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static ERRCODE ntxClose( NTXAREAP pArea );
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/* Close workarea - at first we mus close all indexes and than close
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workarea */
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#define ntxCreate NULL
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#define ntxInfo NULL
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#define ntxNewArea NULL
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static ERRCODE ntxOpen( NTXAREAP pArea, LPDBOPENINFO pOpenInfo );
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#define ntxRelease NULL
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static ERRCODE ntxStructSize( NTXAREAP pArea, USHORT * uiSize );
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#define ntxSysName NULL
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#define ntxEval NULL
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static ERRCODE ntxPack( NTXAREAP pArea );
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#define ntPackRec NULL
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#define ntxSort NULL
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#define ntxTrans NULL
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#define ntxTransRec NULL
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static ERRCODE ntxZap( NTXAREAP pArea );
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#define ntxchildEnd NULL
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#define ntxchildStart NULL
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#define ntxchildSync NULL
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#define ntxsyncChildren NULL
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#define ntxclearRel NULL
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#define ntxforceRel NULL
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#define ntxrelArea NULL
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#define ntxrelEval NULL
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#define ntxrelText NULL
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#define ntxsetRel NULL
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static ERRCODE ntxOrderListAdd( NTXAREAP pArea, LPDBORDERINFO pOrderInfo );
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static ERRCODE ntxOrderListClear( NTXAREAP pArea );
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static ERRCODE ntxOrderListDelete( NTXAREAP pArea, LPDBORDERINFO pOrderInfo );
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static ERRCODE ntxOrderListFocus( NTXAREAP pArea, LPDBORDERINFO pOrderInfo );
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static ERRCODE ntxOrderListRebuild( NTXAREAP pArea );
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#define ntxOrderCondition NULL
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static ERRCODE ntxOrderCreate( NTXAREAP pArea, LPDBORDERCREATEINFO pOrderInfo );
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static ERRCODE ntxOrderDestroy( NTXAREAP pArea, LPDBORDERINFO pOrderInfo );
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static ERRCODE ntxOrderInfo( NTXAREAP pArea, USHORT uiIndex, LPDBORDERINFO pInfo );
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#define ntxClearFilter NULL
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#define ntxClearLocate NULL
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#define ntxClearScope NULL
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static ERRCODE ntxCountScope( NTXAREAP pArea, void * pPtr, LONG * plRecNo );
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#define ntxFilterText NULL
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#define ntxScopeInfo NULL
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#define ntxSetFilter NULL
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#define ntxSetLocate NULL
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#define ntxSetScope NULL
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#define ntxSkipScope NULL
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#define ntxLocate NULL
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#define ntxCompile NULL
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#define ntxError NULL
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#define ntxEvalBlock NULL
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#define ntxRawLock NULL
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#define ntxLock NULL
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#define ntxUnLock NULL
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#define ntxCloseMemFile NULL
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#define ntxCreateMemFile NULL
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#define ntxGetValueFile NULL
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#define ntxOpenMemFile NULL
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#define ntxPutValueFile NULL
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#define ntxReadDBHeader NULL
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#define ntxWriteDBHeader NULL
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static ERRCODE ntxInit( LPRDDNODE pRDD );
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#define ntxExit NULL
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#define ntxDrop NULL
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#define ntxExists NULL
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static ERRCODE ntxRddInfo( LPRDDNODE pRDD, USHORT uiIndex, ULONG ulConnect, PHB_ITEM pItem );
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#define ntxWhoCares NULL
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HB_EXTERN_END
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#endif /* HB_RDDNTX_H_ */
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