192 lines
4.4 KiB
C
192 lines
4.4 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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* Number manipulation
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*
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* Copyright 2000 Jose Lalin <dezac@corevia.com>
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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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#include <math.h>
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#include "hbapi.h"
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#include "hbapiitm.h"
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#define PI ( 3.1415926535897932384626433 )
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/* Ceiling( <nNumber> ) --> nInteger
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Return the smallest integer that is greater than or equal to <nNumber>
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*/
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HB_FUNC( CEILING )
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{
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hb_retnl( ceil( hb_parnd( 1 ) ) );
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}
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/* DtoR( <nDegrees> ) --> nRadians
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Convert an angle size specified in radians to degrees
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*/
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HB_FUNC( DTOR )
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{
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hb_retndlen( ( hb_parnd( 1 ) / 180 ) * PI, 10, 9 );
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}
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/* Floor( <nNumber> ) --> nInteger
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Return the largest integer that is less than or equal to <nNumber>
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*/
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HB_FUNC( FLOOR )
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{
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hb_retnl( floor( hb_parnd( 1 ) ) );
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}
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/* NumAsLog10( <nNumber> ) --> nLog10
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Convert a positive number to log base 10
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*/
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HB_FUNC( NUMASLOG10 )
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{
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if( ISNUM( 1 ) )
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{
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hb_retnd( log10( hb_parnd(1) ) );
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}
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}
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/* NumGetDecimals( <nNumber> ) --> nDecimals
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Determine the number of decimal digits
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*/
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HB_FUNC( NUMGETDECIMALS )
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{
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int iDec = 0;
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if( ISNUM( 1 ) )
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{
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hb_itemGetNLen( hb_param( 1, HB_IT_NUMERIC ), NULL, &iDec );
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}
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hb_retnl( iDec );
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}
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/* NumGetLen( <nNumber> ) --> nDigits
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Determine the number of whole number digits
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*/
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HB_FUNC( NUMGETLEN )
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{
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ULONG ulLen = 0;
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if( ISNUM( 1 ) )
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{
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char * szBuffer = hb_itemStr( hb_param( 1, HB_IT_NUMERIC ), NULL, NULL );
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char * ptr = szBuffer;
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while( HB_ISSPACE( *ptr ) )
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ptr++;
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if( !strchr( ptr, '.' ) )
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{
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while( *ptr )
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{
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ptr++;
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ulLen++;
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}
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}
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else
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{
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while( *ptr != '.' )
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{
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ptr++;
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ulLen++;
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}
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}
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if( szBuffer )
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hb_xfree( szBuffer );
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}
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hb_retnl( ulLen );
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}
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/* RtoD( <nRadians> ) --> nDegrees
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Convert an angle size specified in radians to degrees
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*/
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HB_FUNC( RTOD )
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{
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hb_retnd( 180 * ( hb_parnd( 1 ) / PI ) );
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}
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/* Sign( <nNumber> ) --> nSign
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Return the sign of a number as follows:
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0 - <nNumber> is zero
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1 - <nNumber> is positive
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-1 - <nNumber> is negative
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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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long lNumber = hb_parnl( 1 );
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hb_retni( lNumber == 0 ? 0 : ( lNumber > 0 ? 1 : -1 ) );
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}
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}
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/* NumAsCurrency( <nNumber>, <cSymbol>, <nSide> ) --> cCurrency
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Convert number to currency format, floating dollar symbol
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*/
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HB_FUNC( NUMASCURRENCY )
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{
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char * szBuffer = hb_itemStr( hb_param( 1, HB_IT_NUMERIC ), NULL, NULL );
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long ulSymbolLen = hb_itemGetCLen( hb_param( 2, HB_IT_STRING ) );
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char * ptr = szBuffer;
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char * szCurrency;
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ULONG ulLen;
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ulLen = strlen( ptr );
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szCurrency = ( char * ) hb_xgrab( ulLen + ulSymbolLen ) ;
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if( hb_parni( 3 ) < 0 )
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{
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while( HB_ISSPACE( *ptr ) )
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ptr++;
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ulLen = strlen( ptr );
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memcpy( szCurrency, hb_parc( 2 ), ulSymbolLen );
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memcpy( szCurrency + ulSymbolLen, ptr, ulLen );
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}
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else
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{
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memcpy( szCurrency, ptr, ulLen );
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memcpy( szCurrency + ulLen, hb_parc( 2 ), ulSymbolLen );
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}
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if( szBuffer )
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hb_xfree( szBuffer );
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hb_retclen( szCurrency, ulLen + ulSymbolLen );
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hb_xfree( szCurrency );
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}
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