135 lines
4.3 KiB
C
135 lines
4.3 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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* STRZERO() function
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*
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* Copyright 1999-2001 Viktor Szakats <viktor.szakats@syenar.hu>
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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 "hbapi.h"
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#include "hbapiitm.h"
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#include "hbapierr.h"
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HB_FUNC( STRZERO )
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{
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if( hb_pcount() >= 1 && hb_pcount() <= 3 )
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{
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BOOL bValid;
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PHB_ITEM pNumber = hb_param( 1, HB_IT_NUMERIC );
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PHB_ITEM pWidth = NULL;
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PHB_ITEM pDec = NULL;
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if( pNumber )
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{
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bValid = TRUE;
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if( hb_pcount() >= 2 )
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{
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pWidth = hb_param( 2, HB_IT_NUMERIC );
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if( !pWidth )
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bValid = FALSE;
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}
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if( hb_pcount() >= 3 )
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{
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pDec = hb_param( 3, HB_IT_NUMERIC );
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if( !pDec )
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bValid = FALSE;
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}
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}
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else
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bValid = FALSE;
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if( bValid )
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{
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char * szResult = hb_itemStr( pNumber, pWidth, pDec );
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if( szResult )
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{
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ULONG ulPos = 0;
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while( szResult[ ulPos ] != '\0' && szResult[ ulPos ] != '-' )
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ulPos++;
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if( szResult[ ulPos ] == '-' )
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{
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/* NOTE: Negative sign found, put it to the first position */
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szResult[ ulPos ] = ' ';
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ulPos = 0;
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while( szResult[ ulPos ] != '\0' && szResult[ ulPos ] == ' ' )
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szResult[ ulPos++ ] = '0';
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szResult[ 0 ] = '-';
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}
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else
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{
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/* Negative sign not found */
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ulPos = 0;
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while( szResult[ ulPos ] != '\0' && szResult[ ulPos ] == ' ' )
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szResult[ ulPos++ ] = '0';
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}
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hb_retc_buffer( szResult );
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}
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else
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hb_retc( NULL );
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}
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else
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#ifdef HB_C52_STRICT
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/* NOTE: In CA-Cl*pper STRZERO() is written in Clipper, and will call
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STR() to do the job, the error (if any) will also be thrown
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by STR(). [vszakats] */
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hb_errRT_BASE_SubstR( EG_ARG, 1099, NULL, "STR", 3, hb_paramError( 1 ), hb_paramError( 2 ), hb_paramError( 3 ) );
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#else
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hb_errRT_BASE_SubstR( EG_ARG, 9999, NULL, "STRZERO", 3, hb_paramError( 1 ), hb_paramError( 2 ), hb_paramError( 3 ) );
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#endif
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}
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}
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