/*
 * $Id$
 */

/*
 * Harbour Project source code:
 * DBF RDD module
 *
 * Copyright 1999 Bruno Cantero <bruno@issnet.net>
 * www - http://www.harbour-project.org
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this software; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
 *
 * As a special exception, the Harbour Project gives permission for
 * additional uses of the text contained in its release of Harbour.
 *
 * The exception is that, if you link the Harbour libraries with other
 * files to produce an executable, this does not by itself cause the
 * resulting executable to be covered by the GNU General Public License.
 * Your use of that executable is in no way restricted on account of
 * linking the Harbour library code into it.
 *
 * This exception does not however invalidate any other reasons why
 * the executable file might be covered by the GNU General Public License.
 *
 * This exception applies only to the code released by the Harbour
 * Project under the name Harbour.  If you copy code from other
 * Harbour Project or Free Software Foundation releases into a copy of
 * Harbour, as the General Public License permits, the exception does
 * not apply to the code that you add in this way.  To avoid misleading
 * anyone as to the status of such modified files, you must delete
 * this exception notice from them.
 *
 * If you write modifications of your own for Harbour, it is your choice
 * whether to permit this exception to apply to your modifications.
 * If you do not wish that, delete this exception notice.
 *
 */

#ifndef HB_RDDDBF_H_
#define HB_RDDDBF_H_

#include "hbapirdd.h"
#include "hbdbferr.h"
#include "hbdbf.h"

HB_EXTERN_BEGIN

/* DBF default file extensions */
#define DBF_TABLEEXT                      ".dbf"

/* DBF locking schemes */
#define DBF_LOCKPOS_CLIP                  1000000000UL
#define DBF_LOCKPOS_CL53                  1000000000UL
#define DBF_LOCKPOS_VFP                   0x40000000UL
#define DBF_LOCKPOS_VFPX                  0x7ffffffeUL
#define DBF_LOCKPOS_CL53EXT               4000000000UL
#define DBF_LOCKPOS_XHB64                 HB_LL( 0x7FFFFFFF00000001 )

#define DBF_LOCKDIR_CLIP                  1
#define DBF_LOCKDIR_CL53                  1
#define DBF_LOCKDIR_VFP                   2  /* lock forward at at record offset */
#define DBF_LOCKDIR_VFPX                  -1
#define DBF_LOCKDIR_CL53EXT               1
#define DBF_LOCKDIR_XHB64                 1

#define DBF_FLCKSIZE_CLIP                 1000000000UL
#define DBF_FLCKSIZE_CL53                 1000000000UL
#define DBF_FLCKSIZE_VFP                  0x3ffffffdUL
#define DBF_FLCKSIZE_VFPX                 0x07ffffffUL
#define DBF_FLCKSIZE_CL53EXT              294967295UL
#define DBF_FLCKSIZE_XHB64                0x7ffffffeUL

#define DBF_RLCKSIZE_CLIP                 1UL
#define DBF_RLCKSIZE_CL53                 1UL
#define DBF_RLCKSIZE_VFP                  1UL
#define DBF_RLCKSIZE_VFPX                 1UL
#define DBF_RLCKSIZE_CL53EXT              1UL
#define DBF_RLCKSIZE_XHB64                1UL

#define IDX_LOCKPOS_CLIP                  1000000000UL
#define IDX_LOCKPOS_CL53                  0xfffeffffUL
#define IDX_LOCKPOS_VFP                   0x7ffffffeUL
#define IDX_LOCKPOS_CL53EXT               0xfffeffffUL
#define IDX_LOCKPOS_XHB64                 HB_LL( 0x7FFFFFFF00000001 )

#define IDX_LOCKPOOL_CLIP                 0UL
#define IDX_LOCKPOOL_CL53                 0x00010000UL
#define IDX_LOCKPOOL_VFP                  0UL
#define IDX_LOCKPOOL_CL53EXT              0x00010000UL
#define IDX_LOCKPOOL_XHB64                0UL


/* Index dirty read flags */
#define HB_IDXREAD_CLEAN      0
#define HB_IDXREAD_DEFAULT    1
#define HB_IDXREAD_DIRTY      2

#define HB_IDXREAD_CLEANMASK  HB_IDXREAD_DIRTY
#define HB_IDXREAD_DIRTYMASK  (HB_IDXREAD_DIRTY|HB_IDXREAD_DEFAULT)

#define DBFNODE_DATARAW( r )  ( ( r )->lpvCargo )
#define DBFNODE_DATA( r )     ( (LPDBFDATA) DBFNODE_DATARAW( r )  )

#define DBFAREA_DATA( w )     DBFNODE_DATA( SELF_RDDNODE( &( w )->area ) )


#define HB_DIRTYREAD( w )     ( ( DBFAREA_DATA( w )->uiDirtyRead & \
                                              ( w )->uiDirtyRead ) != 0 )


/*
 * Private DBF* RDD data kept in RDDNODE
 */
typedef struct _DBFDATA
{
   char     szTableExt[ HB_MAX_FILE_EXT + 1 ];
   char     szIndexExt[ HB_MAX_FILE_EXT + 1 ];
   char     szMemoExt[ HB_MAX_FILE_EXT + 1 ];

   char *   szPasswd;
   char *   szPendingPasswd;
   char *   szTrigger;
   char *   szPendingTrigger;

   BYTE     bLockType;        /* 0 */
   BYTE     bTableType;       /* DB_DBF_STD */
   BYTE     bCryptType;       /* DB_CRYPT_NONE */
   BYTE     bMemoType;        /* DB_MEMO_FPT */
   BYTE     bMemoExtType;     /* DB_MEMOVER_FLEX */
   USHORT   uiDirtyRead;      /* HB_IDXREAD_CLEANMASK */
   ULONG    ulMemoBlockSize;  /* 0 */

   BOOL     fSortRecNo;
   BOOL     fMultiKey;
   BOOL     fStruct;
   BOOL     fStrictStruct;
   BOOL     fMultiTag;
} DBFDATA, * LPDBFDATA;




/*
 *  DBF WORKAREA
 *  ------------
 *  The Workarea Structure of DBF RDD
 *
 */

typedef struct _DBFAREA
{
   AREA area;

   /*
   *  DBFS's additions to the workarea structure
   *
   *  Warning: The above section MUST match WORKAREA exactly!  Any
   *  additions to the structure MUST be added below, as in this
   *  example.
   */

   PHB_FILE pDataFile;              /* Data file handle */
   PHB_FILE pMemoFile;              /* Memo file handle */
   PHB_FILE pMemoTmpFile;           /* Memo temporary file handle */
   char *   szDataFileName;         /* Name of data file */
   char *   szMemoFileName;         /* Name of memo file */
   USHORT   uiHeaderLen;            /* Size of header */
   USHORT   uiRecordLen;            /* Size of record */
   ULONG    ulMemoBlockSize;        /* Size of memo block */
   ULONG    ulNewBlockSize;         /* Size of new memo block */
   USHORT   uiMemoVersion;          /* MEMO file version */
   USHORT   uiDirtyRead;            /* Index dirty read bit filed */
   BYTE     bTableType;             /* DBF type */
   BYTE     bMemoType;              /* MEMO type used in DBF memo fields */
   BYTE     bLockType;              /* Type of locking shemes */
   BYTE     bCryptType;             /* Type of used encryption */
   DBFHEADER dbfHeader;             /* DBF header buffer */
   USHORT * pFieldOffset;           /* Pointer to field offset array */
   BYTE *   pRecord;                /* Buffer of record data */
   ULONG    ulRecCount;             /* Total records */
   ULONG    ulRecNo;                /* Current record */
   BOOL     fAutoInc;               /* WorkArea with auto increment fields */
   BOOL     fHasMemo;               /* WorkArea with Memo fields */
   BOOL     fHasTags;               /* WorkArea with MDX or CDX index */
   BOOL     fModStamp;              /* WorkArea with modification autoupdate fields */
   BOOL     fDataFlush;             /* data was written to DBF and not commited */
   BOOL     fMemoFlush;             /* data was written to MEMO and not commited */
   BOOL     fShared;                /* Shared file */
   BOOL     fReadonly;              /* Read only file */
   BOOL     fTemporary;             /* Temporary file */
   BOOL     fValidBuffer;           /* State of buffer */
   BOOL     fPositioned;            /* Positioned record */
   BOOL     fRecordChanged;         /* Record changed */
   BOOL     fAppend;                /* TRUE if new record is added */
   BOOL     fDeleted;               /* TRUE if record is deleted */
   BOOL     fEncrypted;             /* TRUE if record is encrypted */
   BOOL     fTableEncrypted;        /* TRUE if table is encrypted */
   BOOL     fUpdateHeader;          /* Update header of file */
   BOOL     fFLocked;               /* TRUE if file is locked */
   BOOL     fHeaderLocked;          /* TRUE if DBF header is locked */
   BOOL     fPackMemo;              /* Pack memo file in pack operation */
   BOOL     fTrigger;               /* Execute trigger function */
   LPDBOPENINFO lpdbOpenInfo;       /* Pointer to current dbOpenInfo structure in OPEN/CREATE methods */
   LPDBRELINFO lpdbPendingRel;      /* Pointer to parent rel struct */
   ULONG *  pLocksPos;              /* List of records locked */
   ULONG    ulNumLocksPos;          /* Number of records locked */
   char *   pCryptKey;              /* Pointer to encryption key */
   PHB_DYNS pTriggerSym;            /* DynSym pointer to trigger function */
   USHORT   uidbaselock;            /* position of _dbaselock field 0 if doesn't exists */   
   USHORT   uiFieldNullFlags;       /* Number of Field _NullFlags */   
} DBFAREA;

typedef DBFAREA * LPDBFAREA;

#ifndef DBFAREAP
#define DBFAREAP LPDBFAREA
#endif

#define SUPERTABLE                         ( &dbfSuper )

extern HB_EXPORT ULONG      hb_dbfGetMemoBlock( DBFAREAP pArea, USHORT uiIndex );
extern HB_EXPORT void       hb_dbfPutMemoBlock( DBFAREAP pArea, USHORT uiIndex,
                                                ULONG ulBlock );
extern HB_EXPORT HB_ERRCODE hb_dbfGetMemoData( DBFAREAP pArea, USHORT uiIndex,
                                               ULONG * pulBlock, ULONG * pulSize,
                                               ULONG * pulType );
extern HB_EXPORT HB_ERRCODE hb_dbfSetMemoData( DBFAREAP pArea, USHORT uiIndex,
                                               ULONG ulBlock, ULONG ulSize,
                                               ULONG ulType );
extern HB_EXPORT HB_ERRCODE hb_dbfGetEGcode( HB_ERRCODE errCode );
extern HB_EXPORT BOOL       hb_dbfLockIdxFile( PHB_FILE pFile, BYTE bScheme, USHORT usMode, HB_FOFFSET *pPoolPos );
extern HB_EXPORT BOOL       hb_dbfnetLockIdxFile( PHB_FILE pFile, BYTE bScheme, USHORT usMode, HB_FOFFSET *pPoolPos );
extern HB_EXPORT BOOL       hb_dbfLockIdxGetData( BYTE bScheme, HB_FOFFSET *ulPos, HB_FOFFSET *ulPool );

#ifndef HB_CDP_SUPPORT_OFF
extern HB_EXPORT void hb_dbfTranslateRec( DBFAREAP pArea, BYTE * pBuffer, PHB_CODEPAGE cdp_src, PHB_CODEPAGE cdp_dest );
#endif

HB_EXTERN_END

#endif /* HB_RDDDBF_H_ */
