167 lines
4.8 KiB
Plaintext
167 lines
4.8 KiB
Plaintext
/*
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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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* __DBCOPYSTRUCT(), __DBCOPYXSTRUCT(), __DBCREATE() functions
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*
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* Copyright 1999 {list of individual authors and e-mail addresses}
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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 of the License, or
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* (at your option) any later version, with one exception:
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*
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* The exception is that if you link the Harbour Runtime Library (HRL)
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* and/or the Harbour Virtual Machine (HVM) with other files to produce
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* an executable, this does not by itself cause the resulting executable
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* to be covered by the GNU General Public License. Your use of that
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* executable is in no way restricted on account of linking the HRL
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* and/or HVM code into it.
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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 program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA (or visit
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* their web site at http://www.gnu.org/).
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*
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*/
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#include "hbsetup.ch"
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#include "common.ch"
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#include "dbstruct.ch"
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FUNCTION __dbCopyStruct( cFileName, aFieldList )
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RETURN dbCreate( cFileName, __dbStructFilter( dbStruct(), aFieldList ) )
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FUNCTION __dbCopyXStruct( cFileName )
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LOCAL nOldArea
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LOCAL oError
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LOCAL aStruct
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IF Empty( aStruct := dbStruct() )
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RETURN .F.
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ENDIF
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nOldArea := Select()
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BEGIN SEQUENCE
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dbSelectArea( 0 )
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__dbCreate( cFileName, NIL, NIL, .F., NIL )
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aEval( aStruct, {| aField | iif( aField[ DBS_TYPE ] == "C" .AND. aField[ DBS_LEN ] > 255, ;
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( aField[ DBS_DEC ] := Int( aField[ DBS_LEN ] / 256 ), aField[ DBS_LEN ] := aField[ DBS_LEN ] % 256 ), NIL ) } )
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aEval( aStruct, {| aField | dbAppend(),;
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FIELD->FIELD_NAME := aField[ DBS_NAME ],;
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FIELD->FIELD_TYPE := aField[ DBS_TYPE ],;
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FIELD->FIELD_LEN := aField[ DBS_LEN ], ;
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FIELD->FIELD_DEC := aField[ DBS_DEC ] } )
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/* NOTE: CA-Cl*pper has a bug, where only a plain RECOVER statement is
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used here (without the USING keyword), so oError will always be
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NIL. */
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RECOVER USING oError
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END SEQUENCE
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IF Select() != nOldArea
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dbCloseArea()
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dbSelectArea( nOldArea )
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ENDIF
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IF oError != NIL
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Break( oError )
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ENDIF
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RETURN .T.
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FUNCTION __dbCreate( cFileName, cFileFrom, cRDDName, lNew, cAlias )
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LOCAL nOldArea := Select()
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LOCAL aStruct := {}
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LOCAL oError
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DEFAULT lNew TO .F.
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IF Used() .AND. ! lNew
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dbCloseArea()
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ENDIF
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BEGIN SEQUENCE
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IF Empty( cFileFrom )
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dbCreate( cFileName, {;
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{ "FIELD_NAME", "C", 10, 0 },;
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{ "FIELD_TYPE", "C", 1, 0 },;
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{ "FIELD_LEN" , "N", 3, 0 },;
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{ "FIELD_DEC" , "N", 3, 0 } }, cRDDName )
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dbUseArea( .F., cRDDName, cFileName, cAlias )
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ELSE
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dbUseArea( lNew,, cFileFrom )
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dbEval( {|| aAdd( aStruct, { FIELD->FIELD_NAME ,;
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FIELD->FIELD_TYPE ,;
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FIELD->FIELD_LEN ,;
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FIELD->FIELD_DEC } ) } )
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dbCloseArea()
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IF lNew
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dbSelectArea( nOldArea )
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ENDIF
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aEval( aStruct, {| aField | iif( aField[ DBS_TYPE ] == "C" .AND. aField[ DBS_DEC ] != 0, ;
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aField[ DBS_LEN ] := aField[ DBS_LEN ] + aField[ DBS_DEC ] * 256, NIL ) } )
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dbCreate( cFileName, aStruct, cRDDName )
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dbUseArea( lNew, cRDDName, cFileName, cAlias )
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ENDIF
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RECOVER USING oError
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dbCloseArea()
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Break( oError )
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END SEQUENCE
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RETURN Used()
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/* NOTE: Undocumented, internal Clipper function */
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#ifdef HB_C52_UNDOC
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FUNCTION __FLEDIT( aStruct, aFieldList )
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RETURN __dbStructFilter( aStruct, aFieldList )
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#endif
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/* NOTE: Internal helper function, CA-Cl*pper name is: __FLEDIT() */
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FUNCTION __dbStructFilter( aStruct, aFieldList )
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LOCAL aStructFiltered
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LOCAL bFindName
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LOCAL cName
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IF Empty( aFieldList )
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RETURN aStruct
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ENDIF
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/* Build a filtered list of the requested fields. */
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aStructFiltered := {}
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bFindName := {| aField | aField[ DBS_NAME ] == RTrim( Upper(cName ) ) }
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aEval( aFieldList, {| cFieldName, nIndex | cName := cFieldName, nIndex := aScan( aStruct, bFindName ),;
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iif( nIndex == 0, NIL, aAdd( aStructFiltered, aStruct[ nIndex] ) ) } )
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RETURN aStructFiltered
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