263 lines
7.1 KiB
C
263 lines
7.1 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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*
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* CT3 Numeric functions - PART 1
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* - CELSIUS
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* - FAHRENHEIT
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* - INFINITY
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*
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* NOTE: All these functions were builded using Borland C++ 5.5 (free version)
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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://www.harbour-project.org
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*
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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. 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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/* $DOC$
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* $FUNCNAME$
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* CELSIUS()
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* $CATEGORY$
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* CT3 numeric functions
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* $ONELINER$
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* Temperature conversion Fahrenheit to Celsius
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* $SYNTAX$
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* CELSIUS (nDegreeFahrenheit) --> nDegreeCelsius
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* $ARGUMENTS$
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* <nDegreeFahrenheit> temperature in degree Fahrenheit
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* $RETURNS$
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* <nDegreeCelsius> temperate in degree Celsius
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* $DESCRIPTION$
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* CELSIUS() converts temperature values measured in the Fahrenheit scale
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* to the Celsius scale.
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* $EXAMPLES$
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* // melting point of water in standard conditions
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* ? celsius (32.0) --> 0.0
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* // boiling point of water in standard conditions
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* ? celsius (212.0) --> 100.0
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* $TESTS$
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* celsius (32.0) == 0.0
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* celsius (212.0) == 100.0
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* $STATUS$
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* Ready
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* $COMPLIANCE$
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* CELSIUS() is compatible with CT3's CELSIUS().
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* $PLATFORMS$
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* All
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* $FILES$
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* Source is num1.c, library is libct.
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* $SEEALSO$
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* FAHRENHEIT()
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* $END$
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*/
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HB_FUNC( CELSIUS )
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{
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if( ISNUM(1) )
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{
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double dInput = hb_parnd(1);
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double dResult;
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dResult = (5.0 / 9.0) * ( dInput - 32.0 );
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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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{
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pSubst = ct_error_subst ((USHORT)iArgErrorMode, EG_ARG, CT_ERROR_CELSIUS,
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NULL, "CELSIUS", 0, EF_CANSUBSTITUTE, 1, hb_paramError (1));
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}
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if (pSubst != NULL)
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{
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hb_itemReturn (pSubst);
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hb_itemRelease (pSubst);
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}
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else
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{
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hb_retnd (0.0);
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}
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}
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return;
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}
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/* $DOC$
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* $FUNCNAME$
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* FAHRENHEIT()
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* $CATEGORY$
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* CT3 numeric functions
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* $ONELINER$
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* Temperature conversion Celsius to Fahrenheit
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* $SYNTAX$
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* FAHRENHEIT (nDegreeCelsius) --> nDegreeFahrenheit
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* $ARGUMENTS$
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* <nDegreeCelsius> temperate in degree Celsius
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* $RETURNS$
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* <nDegreeFahrenheit> temperature in degree Fahrenheit
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* $DESCRIPTION$
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* FAHRENHEIT() converts temperature values measured in the Celsius scale
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* to the Fahrenheit scale.
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* $EXAMPLES$
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* // melting point of water in standard conditions
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* ? fahrenheit (0.0) --> 32.0
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* // boiling point of water in standard conditions
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* ? fahrenheit (100.0) --> 212.0
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* $TESTS$
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* fahrenheit (0.0) == 32.0
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* celsius (100.0) == 212.0
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* $STATUS$
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* Ready
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* $COMPLIANCE$
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* FAHRENHEIT() is compatible with CT3's FAHRENHEIT().
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* $PLATFORMS$
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* All
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* $FILES$
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* Source is num1.c, library is libct.
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* $SEEALSO$
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* CELSIUS()
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* $END$
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*/
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HB_FUNC( FAHRENHEIT )
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{
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if( ISNUM(1) )
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{
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double dInput = hb_parnd(1);
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double dResult;
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dResult = (( 9.0 / 5.0) * dInput ) + 32.0 ;
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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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{
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pSubst = ct_error_subst ((USHORT)iArgErrorMode, EG_ARG, CT_ERROR_FAHRENHEIT,
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NULL, "FAHRENHEIT", 0, EF_CANSUBSTITUTE, 1, hb_paramError (1));
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}
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if (pSubst != NULL)
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{
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hb_itemReturn (pSubst);
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hb_itemRelease (pSubst);
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}
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else
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{
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hb_retnd (0.0);
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}
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}
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return;
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}
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/* $DOC$
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* $FUNCNAME$
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* INFINITY()
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* $CATEGORY$
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* CT3 numeric functions
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* $ONELINER$
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* Returns the largest floating point number available in the system
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* $SYNTAX$
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* INFINITY ([<lPlatformIndependant>]) --> nLargestNumber
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* $ARGUMENTS$
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* [<lPlatformIndependant>] .T., if the function should return
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* the maximum floating point value
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* available (DBL_MAX)
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* .F., function should try to return
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* the same value as the original CT3 lib did
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* Default: .F.
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* $RETURNS$
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* <nLargestNumber> the largest floating point number available in the system
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* $DESCRIPTION$
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* INFINITY() returns the largest floating point number available
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* in the system. For platform independance, this is set to DBL_MAX.
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* $EXAMPLES$
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* $TESTS$
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* $STATUS$
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* Ready
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* $COMPLIANCE$
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* INFINITY() must not necessarily return the same number as CT3's INFINITY().
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* $PLATFORMS$
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* All
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* $FILES$
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* Source is num1.c, library is libct.
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* $SEEALSO$
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* $END$
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*/
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HB_FUNC( INFINITY )
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{
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if (ISLOG (1) && hb_parl(1))
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{
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hb_retnd (DBL_MAX);
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}
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else
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{
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hb_retnd (93786976294838206460.00);
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}
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return;
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}
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