267 lines
7.2 KiB
C
267 lines
7.2 KiB
C
/*
|
|
* $Id$
|
|
*/
|
|
|
|
/*
|
|
* Harbour Project source code:
|
|
*
|
|
* CT3 Numeric functions - PART 1
|
|
* - CELSIUS
|
|
* - FAHRENHEIT
|
|
* - INFINITY
|
|
*
|
|
* NOTE: All these functions were builded using Borland C++ 5.5 (free version)
|
|
*
|
|
* Copyright 2001 Alejandro de Garate <alex_degarate@hotmail.com>
|
|
*
|
|
* Documentation and changes concerning error handling Copyright 2001
|
|
* IntTec GmbH, Freiburg, Germany, Author: Martin Vogel <vogel@inttec.de>
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
|
|
#include "ct.h"
|
|
|
|
|
|
/* $DOC$
|
|
* $FUNCNAME$
|
|
* CELSIUS()
|
|
* $CATEGORY$
|
|
* CT3 numeric functions
|
|
* $ONELINER$
|
|
* Temperature conversion Fahrenheit to Celsius
|
|
* $SYNTAX$
|
|
* CELSIUS (nDegreeFahrenheit) --> nDegreeCelsius
|
|
* $ARGUMENTS$
|
|
* <nDegreeFahrenheit> temperature in degree Fahrenheit
|
|
* $RETURNS$
|
|
* <nDegreeCelsius> temperate in degree Celsius
|
|
* $DESCRIPTION$
|
|
* CELSIUS() converts temperature values measured in the Fahrenheit scale
|
|
* to the Celsius scale.
|
|
* $EXAMPLES$
|
|
* // melting point of water in standard conditions
|
|
* ? celsius (32.0) --> 0.0
|
|
* // boiling point of water in standard conditions
|
|
* ? celsius (212.0) --> 100.0
|
|
* $TESTS$
|
|
* celsius (32.0) == 0.0
|
|
* celsius (212.0) == 100.0
|
|
* $STATUS$
|
|
* Ready
|
|
* $COMPLIANCE$
|
|
* CELSIUS() is compatible with CT3's CELSIUS().
|
|
* $PLATFORMS$
|
|
* All
|
|
* $FILES$
|
|
* Source is num1.c, library is libct.
|
|
* $SEEALSO$
|
|
* FAHRENHEIT()
|
|
* $END$
|
|
*/
|
|
|
|
HB_FUNC( CELSIUS )
|
|
{
|
|
if( ISNUM(1) )
|
|
{
|
|
double dInput = hb_parnd(1);
|
|
double dResult;
|
|
|
|
ct_matherrbegin();
|
|
dResult = (5.0 / 9.0) * ( dInput - 32.0 );
|
|
ct_matherrend();
|
|
hb_retnd( dResult );
|
|
}
|
|
else
|
|
{
|
|
PHB_ITEM pSubst = NULL;
|
|
int iArgErrorMode = ct_getargerrormode();
|
|
if (iArgErrorMode != CT_ARGERR_IGNORE)
|
|
{
|
|
pSubst = ct_error_subst ((USHORT)iArgErrorMode, EG_ARG, CT_ERROR_CELSIUS,
|
|
NULL, "CELSIUS", 0, EF_CANSUBSTITUTE, 1, hb_paramError (1));
|
|
}
|
|
|
|
if (pSubst != NULL)
|
|
{
|
|
hb_itemReturn (pSubst);
|
|
hb_itemRelease (pSubst);
|
|
}
|
|
else
|
|
{
|
|
hb_retnd (0.0);
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/* $DOC$
|
|
* $FUNCNAME$
|
|
* FAHRENHEIT()
|
|
* $CATEGORY$
|
|
* CT3 numeric functions
|
|
* $ONELINER$
|
|
* Temperature conversion Celsius to Fahrenheit
|
|
* $SYNTAX$
|
|
* FAHRENHEIT (nDegreeCelsius) --> nDegreeFahrenheit
|
|
* $ARGUMENTS$
|
|
* <nDegreeCelsius> temperate in degree Celsius
|
|
* $RETURNS$
|
|
* <nDegreeFahrenheit> temperature in degree Fahrenheit
|
|
* $DESCRIPTION$
|
|
* FAHRENHEIT() converts temperature values measured in the Celsius scale
|
|
* to the Fahrenheit scale.
|
|
* $EXAMPLES$
|
|
* // melting point of water in standard conditions
|
|
* ? fahrenheit (0.0) --> 32.0
|
|
* // boiling point of water in standard conditions
|
|
* ? fahrenheit (100.0) --> 212.0
|
|
* $TESTS$
|
|
* fahrenheit (0.0) == 32.0
|
|
* celsius (100.0) == 212.0
|
|
* $STATUS$
|
|
* Ready
|
|
* $COMPLIANCE$
|
|
* FAHRENHEIT() is compatible with CT3's FAHRENHEIT().
|
|
* $PLATFORMS$
|
|
* All
|
|
* $FILES$
|
|
* Source is num1.c, library is libct.
|
|
* $SEEALSO$
|
|
* CELSIUS()
|
|
* $END$
|
|
*/
|
|
|
|
HB_FUNC( FAHRENHEIT )
|
|
{
|
|
if( ISNUM(1) )
|
|
{
|
|
double dInput = hb_parnd(1);
|
|
double dResult;
|
|
|
|
ct_matherrbegin();
|
|
dResult = (( 9.0 / 5.0) * dInput ) + 32.0 ;
|
|
ct_matherrend();
|
|
hb_retnd( dResult );
|
|
}
|
|
else
|
|
{
|
|
PHB_ITEM pSubst = NULL;
|
|
int iArgErrorMode = ct_getargerrormode();
|
|
if (iArgErrorMode != CT_ARGERR_IGNORE)
|
|
{
|
|
pSubst = ct_error_subst ((USHORT)iArgErrorMode, EG_ARG, CT_ERROR_FAHRENHEIT,
|
|
NULL, "FAHRENHEIT", 0, EF_CANSUBSTITUTE, 1, hb_paramError (1));
|
|
}
|
|
|
|
if (pSubst != NULL)
|
|
{
|
|
hb_itemReturn (pSubst);
|
|
hb_itemRelease (pSubst);
|
|
}
|
|
else
|
|
{
|
|
hb_retnd (0.0);
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/* $DOC$
|
|
* $FUNCNAME$
|
|
* INFINITY()
|
|
* $CATEGORY$
|
|
* CT3 numeric functions
|
|
* $ONELINER$
|
|
* Returns the largest floating point number available in the system
|
|
* $SYNTAX$
|
|
* INFINITY ([<lPlatformIndependant>]) --> nLargestNumber
|
|
* $ARGUMENTS$
|
|
* [<lPlatformIndependant>] .T., if the function should return
|
|
* the maximum floating point value
|
|
* available (DBL_MAX)
|
|
* .F., function should try to return
|
|
* the same value as the original CT3 lib did
|
|
* Default: .F.
|
|
* $RETURNS$
|
|
* <nLargestNumber> the largest floating point number available in the system
|
|
* $DESCRIPTION$
|
|
* INFINITY() returns the largest floating point number available
|
|
* in the system. For platform independance, this is set to DBL_MAX.
|
|
* $EXAMPLES$
|
|
* $TESTS$
|
|
* $STATUS$
|
|
* Ready
|
|
* $COMPLIANCE$
|
|
* INFINITY() must not necessarily return the same number as CT3's INFINITY().
|
|
* $PLATFORMS$
|
|
* All
|
|
* $FILES$
|
|
* Source is num1.c, library is libct.
|
|
* $SEEALSO$
|
|
* $END$
|
|
*/
|
|
|
|
HB_FUNC( INFINITY )
|
|
{
|
|
|
|
if (ISLOG (1) && hb_parl(1))
|
|
{
|
|
hb_retnd (DBL_MAX);
|
|
}
|
|
else
|
|
{
|
|
hb_retnd (93786976294838206460.00);
|
|
}
|
|
return;
|
|
|
|
}
|
|
|
|
|