484 lines
11 KiB
C
484 lines
11 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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* 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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* 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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* FLOOR()
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* $CATEGORY$
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* CT3 math functions
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* $ONELINER$
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* Rounds down a number to the next integer
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* $SYNTAX$
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* FLOOR (nNumber) -> nDownRoundedNumber
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* $ARGUMENTS$
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* <nNumber> number to round down
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* $RETURNS$
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* <nDownRoundedNumber> the rounded number
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* $DESCRIPTION$
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* The function FLOOR() determines the biggest integer that is smaller
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* than <nNumber>.
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* $EXAMPLES$
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* ? floor (1.1) --> 1.0
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* ? floor (-1.1) --> -2.0
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* $TESTS$
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* floor (1.1) == 1.0
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* floor (-1.1) == -2.0
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* $STATUS$
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* Ready
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* $COMPLIANCE$
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* FLOOR() is compatible with CT3's FLOOR().
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* $PLATFORMS$
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* All
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* $FILES$
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* Source is math.c, library is libct.
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* $SEEALSO$
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* CEILING
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* $END$
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*/
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HB_FUNC( FLOOR )
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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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ct_matherrbegin();
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dResult = floor (dInput);
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ct_matherrend();
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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_FLOOR,
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NULL, "FLOOR", 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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* CEILING()
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* $CATEGORY$
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* CT3 math functions
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* $ONELINER$
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* Rounds up a number to the next integer
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* $SYNTAX$
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* CEILING (nNumber) -> nUpRoundedNumber
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* $ARGUMENTS$
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* <nNumber> number to round up
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* $RETURNS$
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* <nUpRoundedNumber> the rounded number
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* $DESCRIPTION$
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* The function CEILING() determines the smallest integer that is bigger
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* than <nNumber>.
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* $EXAMPLES$
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* ? ceiling (1.1) --> 2.0
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* ? ceiling (-1.1) --> -1.0
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* $TESTS$
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* ceiling (1.1) == 2.0
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* ceiling (-1.1) == -1.0
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* $STATUS$
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* Ready
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* $COMPLIANCE$
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* CEILING() is compatible with CT3's CEILING().
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* $PLATFORMS$
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* All
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* $FILES$
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* Source is math.c, library is libct.
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* $SEEALSO$
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* FLOOR
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* $END$
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*/
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HB_FUNC( CEILING )
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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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ct_matherrbegin();
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dResult = ceil (dInput);
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ct_matherrend();
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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_CEILING,
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NULL, "CEILING", 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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* SIGN()
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* $CATEGORY$
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* CT3 math functions
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* $ONELINER$
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* Sign of a number
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* $SYNTAX$
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* SIGN (nNumber) -> nSign
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* $ARGUMENTS$
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* <nNumber> a number
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* $RETURNS$
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* <nSign> sign of <nNumber>
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* $DESCRIPTION$
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* The function SIGN() determines the sign of <nNumber>.
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* If <nNumber> is > 0, then SIGN(<nNumber>) returns 1
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* If <nNumber> is < 0, then SIGN(<nNumber>) returns -1
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* If <nNumber> is == 0, then SIGN(<nNumber>) returns 0
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* $EXAMPLES$
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* ? sign (1.1) --> 1
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* ? sign (-1.1) --> -1
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* ? sign (0.0) --> 0
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* $TESTS$
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* sign (1.1) == 1
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* sign (-1.1) == -1
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* sign (0.0) == 0
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* $STATUS$
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* Ready
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* $COMPLIANCE$
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* SIGN() is compatible with CT3's SIGN().
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* $PLATFORMS$
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* All
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* $FILES$
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* Source is math.c, library is libct.
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* $SEEALSO$
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* $END$
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*/
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HB_FUNC( SIGN )
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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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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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{
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pSubst = ct_error_subst ((USHORT)iArgErrorMode, EG_ARG, CT_ERROR_SIGN,
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NULL, "SIGN", 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_retni (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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* LOG10()
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* $CATEGORY$
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* CT3 math functions
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* $ONELINER$
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* Decadic logarithm of a number
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* $SYNTAX$
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* LOG10 (nNumber) -> nLogarithm
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* $ARGUMENTS$
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* <nNumber> number to logarithm
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* $RETURNS$
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* <nLogarithm> decadic logarithm of <nNumber>
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* $DESCRIPTION$
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* The function LOG10() calculates the decadic logarithm of <nNumber>,
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* i.e. 10^<nLogarithm> == <nNumber>.
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* $EXAMPLES$
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* ? log10 (10.0) --> 1.0
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* ? log10 (sqrt(10.0)) --> 0.5
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* $TESTS$
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* log10 (10.0) == 1.0
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* log10 (sqrt(10.0)) == 0.5
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* $STATUS$
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* Ready
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* $COMPLIANCE$
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* LOG10() is compatible with CT3's LOG10().
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* $PLATFORMS$
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* All
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* $FILES$
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* Source is math.c, library is libct.
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* $SEEALSO$
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* $END$
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*/
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HB_FUNC( LOG10 )
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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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if (dInput <= 0.0)
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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_LOG10,
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NULL, "LOG10", 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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else
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{
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ct_matherrbegin();
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dResult = log10 (dInput);
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ct_matherrend();
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hb_retnd( dResult );
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}
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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_LOG10,
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NULL, "LOG10", 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_retni (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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* FACT()
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* $CATEGORY$
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* CT3 math functions
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* $ONELINER$
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* Calculates faculty
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* $SYNTAX$
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* FACT (nNumber) -> nFaculty
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* $ARGUMENTS$
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* <nNumber> number between 0 and 21
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* $RETURNS$
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* <nFaculty> the faculty of <nNumber>
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* $DESCRIPTION$
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* The function FACT() calculates the faculty to the integer given in
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* <nNumber>. The faculty is defined as n! = 1*2*...*n and is often
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* used in statistics. Note, that faculties above 21 are too big
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* so that the function must return a -1.
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* $EXAMPLES$
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* ? fact (0) --> 1
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* ? fact (1) --> 1
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* ? fact (4) --> 24
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* $TESTS$
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* fact (0) == 1
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* fact (1) == 1
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* fact (4) == 24
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* $STATUS$
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* Ready
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* $COMPLIANCE$
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* FACT() is compatible with CT3's FACT().
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* $PLATFORMS$
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* All
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* $FILES$
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* Source is math.c, library is libct.
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* $SEEALSO$
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* $END$
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*/
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HB_FUNC( FACT )
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{
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if( 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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{
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dResult *= (double)i;
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}
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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_FACT,
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NULL, "FACT", 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 (-1.0);
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}
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}
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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_FACT,
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NULL, "FACT", 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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