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5a2a287752bfffefea112e55c390398568dbb8fa
harbour-core/contrib/sddfb/core.c
Viktor Szakats 5a2a287752 2017-09-08 16:00 UTC Viktor Szakats (vszakats users.noreply.github.com) 
* *
    * partial sync with the 3.4 fork codebase. These are the things
      synces for the most part:
      - copyright headers
      - grammar/typos in comments and some readmes
      - comment/whitespace/decorations
      - variable scoping in C files
      - DO CASE/SWITCH and some other alternate syntax usage
      - minimal amount of human readable text in strings
      - minor code updates
      - HB_TRACE() void * casts for pointers and few other changes to
        avoid C compiler warnings
      - various other, minor code cleanups
      - only Harbour/C code/headers were touched in src, utils, contrib,
        include. No 3rd party code, no make files, and with just a few
        exceptions, no 'tests' code was touched.
      - certain components were not touched were 3.4 diverged too much
        already, like f.e. hbmk2, hbssl, hbcurl, hbexpat
      - the goal was that no actual program logic should be altered by
        these changes. Except some possible minor exceptions, any such
        change is probably a bug in this patch.
      It's a massive patch, if you find anything broken after it, please
      open an Issue with the details. Build test was done on macOS.
      The goal is make it easier to see what actual code/logic was changed
      in 3.4 compared to 3.2 and to make patches easier to apply in both
      ways.
2017-09-08 16:25:13 +00:00

595 lines
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/*
* Firebird SQL Database Driver
*
* Copyright 2007 Mindaugas Kavaliauskas <dbtopas at dbtopas.lt>
*
* 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 program; see the file LICENSE.txt. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA (or visit https://www.gnu.org/licenses/).
*
* 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.
*
*/
/* NOTE: Ugly hack to avoid this error when compiler with BCC 5.8.2 and above:
Error E2238 C:\...\Firebird-2.1.1\include\ibase.h 82: Multiple declaration for 'intptr_t' */
#if ( defined( __BORLANDC__ ) && __BORLANDC__ >= 0x582 )
/* Prevent inclusion of <stdint.h> from hbdefs.h */
#define __STDINT_H
#endif
#include "hbrddsql.h"
#include "hbapiitm.h"
#include "hbvm.h"
#include "ibase.h"
typedef struct
{
isc_db_handle hDb;
} SDDCONN;
typedef struct
{
isc_tr_handle hTrans;
isc_stmt_handle hStmt;
XSQLDA ISC_FAR * pSqlda;
} SDDDATA;
static HB_ERRCODE fbConnect( SQLDDCONNECTION * pConnection, PHB_ITEM pItem );
static HB_ERRCODE fbDisconnect( SQLDDCONNECTION * pConnection );
static HB_ERRCODE fbExecute( SQLDDCONNECTION * pConnection, PHB_ITEM pItem );
static HB_ERRCODE fbOpen( SQLBASEAREAP pArea );
static HB_ERRCODE fbClose( SQLBASEAREAP pArea );
static HB_ERRCODE fbGoTo( SQLBASEAREAP pArea, HB_ULONG ulRecNo );
static SDDNODE s_firebirddd = {
NULL,
"FIREBIRD",
( SDDFUNC_CONNECT ) fbConnect,
( SDDFUNC_DISCONNECT ) fbDisconnect,
( SDDFUNC_EXECUTE ) fbExecute,
( SDDFUNC_OPEN ) fbOpen,
( SDDFUNC_CLOSE ) fbClose,
( SDDFUNC_GOTO ) fbGoTo,
( SDDFUNC_GETVALUE ) NULL,
( SDDFUNC_GETVARLEN ) NULL
};
static void hb_firebirddd_init( void * cargo )
{
HB_SYMBOL_UNUSED( cargo );
if( ! hb_sddRegister( &s_firebirddd ) || ( sizeof( isc_db_handle ) != sizeof( void * ) ) )
hb_errInternal( HB_EI_RDDINVALID, NULL, NULL, NULL );
}
HB_FUNC( HB_SDDFB_REGISTER )
{
hb_firebirddd_init( NULL );
}
/* force SQLBASE linking */
HB_FUNC_TRANSLATE( SDDFB, SQLBASE )
HB_INIT_SYMBOLS_BEGIN( firebirddd__InitSymbols )
{
"SDDFB", { HB_FS_PUBLIC | HB_FS_LOCAL }, { HB_FUNCNAME( SDDFB ) }, NULL
},
HB_INIT_SYMBOLS_END( firebirddd__InitSymbols )
HB_CALL_ON_STARTUP_BEGIN( _hb_firebirddd_init_ )
hb_vmAtInit( hb_firebirddd_init, NULL );
HB_CALL_ON_STARTUP_END( _hb_firebirddd_init_ )
#if defined( HB_PRAGMA_STARTUP )
#pragma startup firebirddd__InitSymbols
#pragma startup _hb_firebirddd_init_
#elif defined( HB_DATASEG_STARTUP )
#define HB_DATASEG_BODY HB_DATASEG_FUNC( firebirddd__InitSymbols ) \
HB_DATASEG_FUNC( _hb_firebirddd_init_ )
#include "hbiniseg.h"
#endif
/* --- */
static HB_USHORT hb_errRT_FirebirdDD( HB_ERRCODE errGenCode, HB_ERRCODE errSubCode, const char * szDescription, const char * szOperation, HB_ERRCODE errOsCode )
{
HB_USHORT uiAction;
PHB_ITEM pError;
pError = hb_errRT_New( ES_ERROR, "SDDFB", errGenCode, errSubCode, szDescription, szOperation, errOsCode, EF_NONE );
uiAction = hb_errLaunch( pError );
hb_itemRelease( pError );
return uiAction;
}
/* --- SDD METHODS --- */
static HB_ERRCODE fbConnect( SQLDDCONNECTION * pConnection, PHB_ITEM pItem )
{
ISC_STATUS_ARRAY status;
isc_db_handle hDb = ( isc_db_handle ) 0;
char parambuf[ 520 ];
int i;
unsigned int ul;
i = 0;
parambuf[ i++ ] = isc_dpb_version1;
parambuf[ i++ ] = isc_dpb_user_name;
ul = ( unsigned int ) hb_arrayGetCLen( pItem, 3 );
if( ul > 255 )
ul = 255;
parambuf[ i++ ] = ( char ) ul;
memcpy( parambuf + i, hb_arrayGetCPtr( pItem, 3 ), ul );
i += ul;
parambuf[ i++ ] = isc_dpb_password;
ul = ( unsigned int ) hb_arrayGetCLen( pItem, 4 );
if( ul > 255 )
ul = 255;
parambuf[ i++ ] = ( char ) ul;
memcpy( parambuf + i, hb_arrayGetCPtr( pItem, 4 ), ul );
i += ul;
if( isc_attach_database( status, ( short ) hb_arrayGetCLen( pItem, 5 ), hb_arrayGetCPtr( pItem, 5 ),
&hDb, ( short ) i, parambuf ) )
/* TODO: error code in status[ 1 ]; */
return HB_FAILURE;
pConnection->pSDDConn = hb_xgrab( sizeof( SDDCONN ) );
( ( SDDCONN * ) pConnection->pSDDConn )->hDb = hDb;
#if 0
HB_TRACE( HB_TR_ALWAYS, ( "hDb=%d", hDb ) );
#endif
return HB_SUCCESS;
}
static HB_ERRCODE fbDisconnect( SQLDDCONNECTION * pConnection )
{
ISC_STATUS_ARRAY status;
isc_detach_database( status, &( ( SDDCONN * ) pConnection->pSDDConn )->hDb );
hb_xfree( pConnection->pSDDConn );
return HB_SUCCESS;
}
static HB_ERRCODE fbExecute( SQLDDCONNECTION * pConnection, PHB_ITEM pItem )
{
HB_SYMBOL_UNUSED( pConnection );
HB_SYMBOL_UNUSED( pItem );
return HB_SUCCESS;
}
static HB_ERRCODE fbOpen( SQLBASEAREAP pArea )
{
isc_db_handle * phDb = &( ( SDDCONN * ) pArea->pConnection->pSDDConn )->hDb;
SDDDATA * pSDDData;
ISC_STATUS_ARRAY status;
isc_tr_handle hTrans = ( isc_tr_handle ) 0;
isc_stmt_handle hStmt = ( isc_stmt_handle ) 0;
XSQLDA ISC_FAR * pSqlda;
XSQLVAR * pVar;
PHB_ITEM pItemEof, pItem;
HB_BOOL bError;
HB_USHORT uiFields, uiCount;
pArea->pSDDData = memset( hb_xgrab( sizeof( SDDDATA ) ), 0, sizeof( SDDDATA ) );
pSDDData = ( SDDDATA * ) pArea->pSDDData;
memset( &status, 0, sizeof( status ) );
#if 0
HB_TRACE( HB_TR_ALWAYS, ( "db=%d", hDb ) );
#endif
if( isc_start_transaction( status, &hTrans, 1, phDb, 0, NULL ) )
{
#if 0
HB_TRACE( HB_TR_ALWAYS, ( "hTrans=%d status=%ld %ld %ld %ld", ( int ) hTrans, ( long ) status[ 0 ], ( long ) status[ 1 ], ( long ) status[ 2 ], ( long ) status[ 3 ] ) );
#endif
hb_errRT_FirebirdDD( EG_OPEN, ESQLDD_START, "Start transaction failed", NULL, ( HB_ERRCODE ) isc_sqlcode( status ) );
return HB_FAILURE;
}
if( isc_dsql_allocate_statement( status, phDb, &hStmt ) )
{
hb_errRT_FirebirdDD( EG_OPEN, ESQLDD_STMTALLOC, "Allocate statement failed", NULL, ( HB_ERRCODE ) isc_sqlcode( status ) );
isc_rollback_transaction( status, &hTrans );
return HB_FAILURE;
}
pSqlda = ( XSQLDA * ) hb_xgrab( XSQLDA_LENGTH( 1 ) );
pSqlda->sqln = 1;
pSqlda->version = 1;
if( isc_dsql_prepare( status, &hTrans, &hStmt, 0, pArea->szQuery, SQL_DIALECT_V5, pSqlda ) )
{
hb_errRT_FirebirdDD( EG_OPEN, ESQLDD_INVALIDQUERY, "Prepare statement failed", pArea->szQuery, ( HB_ERRCODE ) isc_sqlcode( status ) );
isc_dsql_free_statement( status, &hStmt, DSQL_drop );
isc_rollback_transaction( status, &hTrans );
hb_xfree( pSqlda );
return HB_FAILURE;
}
if( isc_dsql_execute( status, &hTrans, &hStmt, 1, NULL ) )
{
hb_errRT_FirebirdDD( EG_OPEN, ESQLDD_EXECUTE, "Execute statement failed", pArea->szQuery, ( HB_ERRCODE ) isc_sqlcode( status ) );
isc_dsql_free_statement( status, &hStmt, DSQL_drop );
isc_rollback_transaction( status, &hTrans );
hb_xfree( pSqlda );
return HB_FAILURE;
}
if( pSqlda->sqld > pSqlda->sqln )
{
uiFields = pSqlda->sqld;
hb_xfree( pSqlda );
pSqlda = ( XSQLDA * ) hb_xgrab( XSQLDA_LENGTH( uiFields ) );
pSqlda->sqln = uiFields;
pSqlda->version = 1;
if( isc_dsql_describe( status, &hStmt, SQL_DIALECT_V5, pSqlda ) )
{
hb_errRT_FirebirdDD( EG_OPEN, ESQLDD_STMTDESCR, "Describe statement failed", NULL, ( HB_ERRCODE ) isc_sqlcode( status ) );
isc_dsql_free_statement( status, &hStmt, DSQL_drop );
isc_rollback_transaction( status, &hTrans );
hb_xfree( pSqlda );
return HB_FAILURE;
}
}
pSDDData->hTrans = hTrans;
pSDDData->hStmt = hStmt;
pSDDData->pSqlda = pSqlda;
uiFields = pSqlda->sqld;
SELF_SETFIELDEXTENT( &pArea->area, uiFields );
pItemEof = hb_itemArrayNew( uiFields );
bError = HB_FALSE;
for( uiCount = 0, pVar = pSqlda->sqlvar; uiCount < uiFields; uiCount++, pVar++ )
{
DBFIELDINFO dbFieldInfo;
int iType;
/* FIXME: if pVar->sqlname is ended with 0 byte then this hb_strndup()
* and hb_xfree() below is redundant and
* dbFieldInfo.atomName = pVar->sqlname;
* is enough.
*/
char * szOurName = hb_strndup( pVar->sqlname, pVar->sqlname_length );
memset( &dbFieldInfo, 0, sizeof( dbFieldInfo ) );
dbFieldInfo.atomName = szOurName;
iType = pVar->sqltype & ~1;
switch( iType )
{
case SQL_TEXT:
{
char * pStr;
dbFieldInfo.uiType = HB_FT_STRING;
dbFieldInfo.uiLen = pVar->sqllen;
pVar->sqldata = ( char * ) hb_xgrab( sizeof( char ) * pVar->sqllen + 2 );
pStr = ( char * ) memset( hb_xgrab( dbFieldInfo.uiLen ), ' ', dbFieldInfo.uiLen );
pItem = hb_itemPutCL( NULL, pStr, dbFieldInfo.uiLen );
hb_xfree( pStr );
break;
}
case SQL_VARYING:
{
char * pStr;
dbFieldInfo.uiType = HB_FT_VARLENGTH;
dbFieldInfo.uiLen = pVar->sqllen;
/* pVar->sqltype = SQL_TEXT; Coercing */
pVar->sqldata = ( char * ) hb_xgrab( sizeof( char ) * pVar->sqllen + 2 );
pStr = ( char * ) memset( hb_xgrab( dbFieldInfo.uiLen ), ' ', dbFieldInfo.uiLen );
pItem = hb_itemPutCL( NULL, pStr, dbFieldInfo.uiLen );
hb_xfree( pStr );
break;
}
case SQL_SHORT:
if( pVar->sqlscale < 0 )
{
dbFieldInfo.uiType = HB_FT_LONG;
dbFieldInfo.uiLen = 7;
dbFieldInfo.uiDec = -pVar->sqlscale;
pItem = hb_itemPutNDLen( NULL, 0.0, 6 - dbFieldInfo.uiDec, ( int ) dbFieldInfo.uiDec );
}
else
{
dbFieldInfo.uiType = HB_FT_INTEGER;
dbFieldInfo.uiLen = 2;
pItem = hb_itemPutNILen( NULL, 0, 6 );
}
pVar->sqldata = ( char * ) hb_xgrab( sizeof( short ) );
break;
case SQL_LONG:
if( pVar->sqlscale < 0 )
{
dbFieldInfo.uiType = HB_FT_LONG;
dbFieldInfo.uiLen = 12;
dbFieldInfo.uiDec = -pVar->sqlscale;
pItem = hb_itemPutNDLen( NULL, 0.0, 11 - dbFieldInfo.uiDec, ( int ) dbFieldInfo.uiDec );
}
else
{
dbFieldInfo.uiType = HB_FT_INTEGER;
dbFieldInfo.uiLen = 4;
pItem = hb_itemPutNLLen( NULL, 0, 11 );
}
pVar->sqldata = ( char * ) hb_xgrab( sizeof( long ) );
break;
case SQL_FLOAT:
dbFieldInfo.uiType = HB_FT_DOUBLE;
dbFieldInfo.uiLen = 8;
dbFieldInfo.uiDec = -pVar->sqlscale;
pVar->sqldata = ( char * ) hb_xgrab( sizeof( float ) );
pItem = hb_itemPutNDLen( NULL, 0.0, 20 - dbFieldInfo.uiDec, dbFieldInfo.uiDec );
break;
case SQL_DOUBLE:
dbFieldInfo.uiType = HB_FT_DOUBLE;
dbFieldInfo.uiLen = 8;
dbFieldInfo.uiDec = -pVar->sqlscale;
pVar->sqldata = ( char * ) hb_xgrab( sizeof( double ) );
pItem = hb_itemPutNDLen( NULL, 0.0, 20 - dbFieldInfo.uiDec, dbFieldInfo.uiDec );
break;
case SQL_TIMESTAMP:
dbFieldInfo.uiType = HB_FT_TIMESTAMP;
dbFieldInfo.uiLen = 8;
pVar->sqldata = ( char * ) hb_xgrab( sizeof( ISC_TIMESTAMP ) );
pItem = hb_itemPutTDT( NULL, 0, 0 );
break;
default: /* other fields as binary string */
pVar->sqldata = ( char * ) hb_xgrab( sizeof( char ) * pVar->sqllen );
pItem = hb_itemNew( NULL );
bError = HB_TRUE;
break;
}
if( pVar->sqltype & 1 )
pVar->sqlind = ( short * ) hb_xgrab( sizeof( short ) );
hb_arraySetForward( pItemEof, uiCount + 1, pItem );
hb_itemRelease( pItem );
if( ! bError )
bError = ( SELF_ADDFIELD( &pArea->area, &dbFieldInfo ) == HB_FAILURE );
hb_xfree( szOurName );
if( bError )
break;
}
if( bError )
{
hb_itemClear( pItemEof );
hb_itemRelease( pItemEof );
hb_errRT_FirebirdDD( EG_CORRUPTION, ESQLDD_INVALIDFIELD, "Invalid field type", pArea->szQuery, 0 );
return HB_FAILURE;
}
pArea->ulRecCount = 0;
pArea->pRow = ( void ** ) hb_xgrab( SQLDD_ROWSET_INIT * sizeof( void * ) );
pArea->pRowFlags = ( HB_BYTE * ) hb_xgrab( SQLDD_ROWSET_INIT * sizeof( HB_BYTE ) );
pArea->ulRecMax = SQLDD_ROWSET_INIT;
pArea->pRow[ 0 ] = pItemEof;
pArea->pRowFlags[ 0 ] = SQLDD_FLAG_CACHED;
return HB_SUCCESS;
}
static HB_ERRCODE fbClose( SQLBASEAREAP pArea )
{
SDDDATA * pSDDData = ( SDDDATA * ) pArea->pSDDData;
ISC_STATUS_ARRAY status;
if( pSDDData )
{
if( pSDDData->pSqlda )
hb_xfree( pSDDData->pSqlda );
if( pSDDData->hStmt )
isc_dsql_free_statement( status, &pSDDData->hStmt, DSQL_drop );
if( pSDDData->hTrans )
isc_rollback_transaction( status, &pSDDData->hTrans );
hb_xfree( pSDDData );
pArea->pSDDData = NULL;
}
return HB_SUCCESS;
}
static HB_ERRCODE fbGoTo( SQLBASEAREAP pArea, HB_ULONG ulRecNo )
{
SDDDATA * pSDDData = ( SDDDATA * ) pArea->pSDDData;
ISC_STATUS_ARRAY status;
XSQLVAR * pVar;
HB_USHORT ui;
ISC_STATUS lErr;
short iType;
while( ulRecNo > pArea->ulRecCount && ! pArea->fFetched )
{
isc_stmt_handle * phStmt = &pSDDData->hStmt;
isc_tr_handle * phTr = &pSDDData->hTrans;
lErr = isc_dsql_fetch( status, phStmt, SQL_DIALECT_V5, pSDDData->pSqlda );
if( lErr == 0 )
{
PHB_ITEM pItem = NULL, pArray;
pArray = hb_itemArrayNew( pArea->area.uiFieldCount );
for( ui = 0; ui < pArea->area.uiFieldCount; ui++ )
{
LPFIELD pField;
pVar = pSDDData->pSqlda->sqlvar + ui;
if( ( pVar->sqltype & 1 ) && ( *pVar->sqlind < 0 ) )
continue; /* NIL value */
pField = pArea->area.lpFields + ui;
iType = pVar->sqltype & ~1;
switch( iType )
{
case SQL_TEXT:
pItem = hb_itemPutCL( pItem, pVar->sqldata, pVar->sqllen );
break;
case SQL_VARYING:
pItem = hb_itemPutCL( pItem, pVar->sqldata + 2, *( short * ) pVar->sqldata );
break;
case SQL_SHORT:
if( pField->uiDec == 0 )
pItem = hb_itemPutNILen( pItem, *( short * ) pVar->sqldata, 6 );
else
pItem = hb_itemPutNDLen( pItem, hb_numDecConv( *( short * ) pVar->sqldata, ( int ) pField->uiDec ),
6 - pField->uiDec, ( int ) pField->uiDec );
break;
case SQL_LONG:
if( pField->uiDec == 0 )
pItem = hb_itemPutNLLen( pItem, *( short * ) pVar->sqldata, 11 );
else
pItem = hb_itemPutNDLen( pItem, hb_numDecConv( *( long * ) pVar->sqldata, ( int ) pField->uiDec ),
11 - pField->uiDec, ( int ) pField->uiDec );
break;
case SQL_FLOAT:
pItem = hb_itemPutNDLen( pItem, *( float * ) pVar->sqldata, 20 - pField->uiDec, pField->uiDec );
break;
case SQL_DOUBLE:
pItem = hb_itemPutNDLen( pItem, *( double * ) pVar->sqldata, 20 - pField->uiDec, pField->uiDec );
break;
case SQL_TIMESTAMP:
pItem = hb_itemPutTDT( pItem, ( ( ISC_TIMESTAMP * ) pVar->sqldata )->timestamp_date + 2400001,
( ( ISC_TIMESTAMP * ) pVar->sqldata )->timestamp_time / 10 );
break;
default:
/* default value is NIL */
break;
}
if( pItem )
hb_arraySetForward( pArray, ui + 1, pItem );
}
if( pArea->ulRecCount + 1 >= pArea->ulRecMax )
{
pArea->pRow = ( void ** ) hb_xrealloc( pArea->pRow, ( pArea->ulRecMax + SQLDD_ROWSET_RESIZE ) * sizeof( void * ) );
pArea->pRowFlags = ( HB_BYTE * ) hb_xrealloc( pArea->pRowFlags, ( pArea->ulRecMax + SQLDD_ROWSET_RESIZE ) * sizeof( HB_BYTE ) );
pArea->ulRecMax += SQLDD_ROWSET_RESIZE;
}
pArea->ulRecCount++;
pArea->pRow[ pArea->ulRecCount ] = pArray;
pArea->pRowFlags[ pArea->ulRecCount ] = SQLDD_FLAG_CACHED;
hb_itemRelease( pItem );
}
else if( lErr == 100 )
{
pArea->fFetched = HB_TRUE;
if( isc_dsql_free_statement( status, phStmt, DSQL_drop ) )
{
hb_errRT_FirebirdDD( EG_OPEN, ESQLDD_STMTFREE, "Statement free error", NULL, ( HB_ERRCODE ) isc_sqlcode( status ) );
return HB_FAILURE;
}
pSDDData->hStmt = ( isc_stmt_handle ) 0;
if( isc_commit_transaction( status, phTr ) )
{
hb_errRT_FirebirdDD( EG_OPEN, ESQLDD_COMMIT, "Transaction commit error", NULL, ( HB_ERRCODE ) isc_sqlcode( status ) );
return HB_FAILURE;
}
pSDDData->hTrans = ( isc_tr_handle ) 0;
hb_xfree( pSDDData->pSqlda ); /* TODO: free is more complex */
pSDDData->pSqlda = NULL;
}
else
{
hb_errRT_FirebirdDD( EG_OPEN, ESQLDD_FETCH, "Fetch error", NULL, ( HB_ERRCODE ) lErr );
return HB_FAILURE;
}
}
if( ulRecNo == 0 || ulRecNo > pArea->ulRecCount )
{
pArea->pRecord = pArea->pRow[ 0 ];
pArea->bRecordFlags = pArea->pRowFlags[ 0 ];
pArea->fPositioned = HB_FALSE;
}
else
{
pArea->pRecord = pArea->pRow[ ulRecNo ];
pArea->bRecordFlags = pArea->pRowFlags[ ulRecNo ];
pArea->fPositioned = HB_TRUE;
}
return HB_SUCCESS;
}
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