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252 lines
7.3 KiB
C
252 lines
7.3 KiB
C
/*
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* Harbour Project source code:
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*
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* CT3 mathematical functions
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* - Floor()
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* - Ceiling()
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* - Sign()
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* - Log10()
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* - Fact()
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*
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* Copyright 2001 Alejandro de Garate <alex_degarate@hotmail.com>
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*
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* Documentation and changes concerning error handling Copyright 2001
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* IntTec GmbH, Freiburg, Germany, Author: Martin Vogel <vogel@inttec.de>
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*
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* www - http://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.txt. 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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#include "ct.h"
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#include "ctmath.h"
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#include "hbmather.h"
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HB_FUNC( FLOOR )
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{
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if( HB_ISNUM( 1 ) )
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{
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HB_MATH_EXCEPTION hb_exc;
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double dResult, dArg = hb_parnd( 1 );
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hb_mathResetError( &hb_exc );
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dResult = floor( dArg );
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if( hb_mathGetError( &hb_exc, "FLOOR", dArg, 0.0, dResult ) )
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{
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if( hb_exc.handled )
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hb_retndlen( hb_exc.retval, hb_exc.retvalwidth, hb_exc.retvaldec );
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else
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hb_retnlen( 0, 0, 0 );
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}
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else
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hb_retnlen( dResult, 0, 0 );
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}
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else
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{
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PHB_ITEM pSubst = NULL;
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int iArgErrorMode = ct_getargerrormode();
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if( iArgErrorMode != CT_ARGERR_IGNORE )
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pSubst =
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ct_error_subst( ( HB_USHORT ) iArgErrorMode, EG_ARG, CT_ERROR_FLOOR, NULL, HB_ERR_FUNCNAME, 0,
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EF_CANSUBSTITUTE, HB_ERR_ARGS_BASEPARAMS );
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if( pSubst != NULL )
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hb_itemReturnRelease( pSubst );
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else
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hb_retnd( 0.0 );
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}
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}
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HB_FUNC( CEILING )
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{
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if( HB_ISNUM( 1 ) )
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{
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HB_MATH_EXCEPTION hb_exc;
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double dResult, dArg = hb_parnd( 1 );
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hb_mathResetError( &hb_exc );
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dResult = ceil( dArg );
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if( hb_mathGetError( &hb_exc, "CEIL", dArg, 0.0, dResult ) )
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{
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if( hb_exc.handled )
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hb_retndlen( hb_exc.retval, hb_exc.retvalwidth, hb_exc.retvaldec );
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else
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hb_retnlen( 0, 0, 0 );
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}
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else
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hb_retnlen( dResult, 0, 0 );
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}
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else
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{
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PHB_ITEM pSubst = NULL;
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int iArgErrorMode = ct_getargerrormode();
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if( iArgErrorMode != CT_ARGERR_IGNORE )
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pSubst = ct_error_subst( ( HB_USHORT ) iArgErrorMode, EG_ARG,
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CT_ERROR_CEILING, NULL, HB_ERR_FUNCNAME, 0,
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EF_CANSUBSTITUTE, HB_ERR_ARGS_BASEPARAMS );
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if( pSubst != NULL )
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hb_itemReturnRelease( pSubst );
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else
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hb_retnd( 0.0 );
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}
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}
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HB_FUNC( SIGN )
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{
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if( HB_ISNUM( 1 ) )
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{
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double dInput = hb_parnd( 1 );
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int iResult;
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if( dInput == 0.00 )
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iResult = 0;
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else
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{
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if( dInput > 0.00 )
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iResult = 1;
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else
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iResult = -1;
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}
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hb_retni( iResult );
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}
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else
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{
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PHB_ITEM pSubst = NULL;
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int iArgErrorMode = ct_getargerrormode();
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if( iArgErrorMode != CT_ARGERR_IGNORE )
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pSubst = ct_error_subst( ( HB_USHORT ) iArgErrorMode, EG_ARG,
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CT_ERROR_SIGN, NULL, HB_ERR_FUNCNAME, 0,
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EF_CANSUBSTITUTE, HB_ERR_ARGS_BASEPARAMS );
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if( pSubst != NULL )
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hb_itemReturnRelease( pSubst );
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else
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hb_retni( 0 );
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}
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}
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HB_FUNC( LOG10 )
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{
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if( HB_ISNUM( 1 ) )
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{
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HB_MATH_EXCEPTION hb_exc;
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double dResult, dArg = hb_parnd( 1 );
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hb_mathResetError( &hb_exc );
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dResult = log10( dArg );
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if( hb_mathGetError( &hb_exc, "LOG10", dArg, 0.0, dResult ) )
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{
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if( hb_exc.handled )
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hb_retndlen( hb_exc.retval, hb_exc.retvalwidth, hb_exc.retvaldec );
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else
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{
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/* math exception is up to the Harbour function, so do this as Clipper compatible as possible */
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switch( hb_exc.type )
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{
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case HB_MATH_ERR_SING: /* argument to log was 0.0 */
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case HB_MATH_ERR_DOMAIN: /* argument to log was < 0.0 */
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hb_retndlen( -HUGE_VAL, -1, -1 ); /* return -infinity */
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break;
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default:
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hb_retnd( 0.0 );
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break;
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}
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}
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}
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else
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hb_retnd( dResult );
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}
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else
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{
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PHB_ITEM pSubst = NULL;
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int iArgErrorMode = ct_getargerrormode();
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if( iArgErrorMode != CT_ARGERR_IGNORE )
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pSubst = ct_error_subst( ( HB_USHORT ) iArgErrorMode, EG_ARG,
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CT_ERROR_LOG10, NULL, HB_ERR_FUNCNAME, 0,
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EF_CANSUBSTITUTE, HB_ERR_ARGS_BASEPARAMS );
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if( pSubst != NULL )
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hb_itemReturnRelease( pSubst );
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else
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hb_retni( 0 );
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}
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}
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HB_FUNC( FACT )
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{
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if( HB_ISNUM( 1 ) )
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{
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int iInput = hb_parni( 1 );
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int i;
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double dResult = 1.0;
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if( ( iInput >= 0 ) && ( iInput < 22 ) )
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{
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for( i = 1; i <= iInput; i++ )
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dResult *= ( double ) i;
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hb_retnd( dResult );
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}
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else
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hb_retnd( -1.0 );
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}
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else
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{
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PHB_ITEM pSubst = NULL;
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int iArgErrorMode = ct_getargerrormode();
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if( iArgErrorMode != CT_ARGERR_IGNORE )
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pSubst = ct_error_subst( ( HB_USHORT ) iArgErrorMode, EG_ARG,
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CT_ERROR_FACT, NULL, HB_ERR_FUNCNAME, 0,
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EF_CANSUBSTITUTE, HB_ERR_ARGS_BASEPARAMS );
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if( pSubst != NULL )
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hb_itemReturnRelease( pSubst );
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else
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hb_retnd( 0.0 );
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}
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}
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