137 lines
3.4 KiB
C
137 lines
3.4 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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* ROUND(), INT() 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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/*
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* The following parts are Copyright of the individual authors.
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* www - http://www.harbour-project.org
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*
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* Copyright 1999 David G. Holm <dholm@jsd-llc.com>
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* ROUND()
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*
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* See doc/license.txt for licensing terms.
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*
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*/
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#include <math.h>
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#include "hbapi.h"
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#include "hbapiitm.h"
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#include "hbapierr.h"
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HB_FUNC( INT )
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{
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PHB_ITEM pNumber = hb_param( 1, IT_NUMERIC );
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if( pNumber )
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{
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double dNumber = hb_itemGetND( pNumber );
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int iWidth;
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hb_itemGetNLen( pNumber, &iWidth, NULL );
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hb_retndlen( dNumber >= 0 ? floor( dNumber ) : ceil( dNumber ), iWidth, 0 );
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}
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else
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{
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PHB_ITEM pResult = hb_errRT_BASE_Subst( EG_ARG, 1090, NULL, "INT" );
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if( pResult )
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{
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hb_itemReturn( pResult );
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hb_itemRelease( pResult );
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}
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}
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}
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double hb_numRound( double dResult, int iDec )
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{
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HB_TRACE(HB_TR_DEBUG, ("hb_numRound(%lf, %d)", dResult, iDec));
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if( dResult != 0.0 )
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{
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if( iDec == 0 )
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{
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if( dResult < 0.0 )
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dResult = ceil( dResult - 0.5 );
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else
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dResult = floor( dResult + 0.5 );
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}
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else if( iDec < 0 )
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{
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double dAdjust = pow( 10, -iDec );
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if( dResult < 0.0 )
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dResult = ceil( ( dResult / dAdjust ) - 0.5 );
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else
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dResult = floor( ( dResult / dAdjust ) + 0.5 );
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dResult *= dAdjust;
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}
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else
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{
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double dAdjust = pow( 10, iDec );
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if( dResult < 0.0 )
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dResult = ceil( ( dResult * dAdjust ) - 0.5 );
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else
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dResult = floor( ( dResult * dAdjust ) + 0.5 );
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dResult /= dAdjust;
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}
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}
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return dResult;
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}
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HB_FUNC( ROUND )
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{
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if( ISNUM( 1 ) && ISNUM( 2 ) )
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{
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int iDec = hb_parni( 2 );
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hb_retndlen( hb_numRound( hb_parnd( 1 ), iDec ), 0, HB_MAX( iDec, 0 ) );
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}
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else
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{
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PHB_ITEM pResult = hb_errRT_BASE_Subst( EG_ARG, 1094, NULL, "ROUND" );
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if( pResult )
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{
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hb_itemReturn( pResult );
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hb_itemRelease( pResult );
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}
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}
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}
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