91 lines
3.2 KiB
C
91 lines
3.2 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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* DESCEND() function
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*
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* Copyright 1999 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, 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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void hb_strDescend( char * szStringTo, const char * szStringFrom, ULONG ulLen )
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{
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HB_TRACE(HB_TR_DEBUG, ("hb_strDescend(%s, %s, %lu)", szStringTo, szStringFrom, ulLen));
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if( ulLen == 1 && szStringFrom[ 0 ] == '\0' )
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szStringTo[ 0 ] = '\0';
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else
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{
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for(; ulLen--; szStringTo++, szStringFrom++ )
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*szStringTo = 256 - *szStringFrom;
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}
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}
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HB_FUNC( DESCEND )
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{
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PHB_ITEM pItem = hb_param( 1, HB_IT_ANY );
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if( pItem )
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{
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if( HB_IS_STRING( pItem ) )
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{
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ULONG ulLen = hb_itemGetCLen( pItem );
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char * szBuffer = ( char * ) hb_xgrab( ulLen );
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hb_strDescend( szBuffer, hb_itemGetCPtr( pItem ), ulLen );
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hb_retclen( szBuffer, ulLen );
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hb_xfree( szBuffer );
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}
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else if( HB_IS_DATE( pItem ) )
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hb_retnl( 5231808 - hb_itemGetDL( pItem ) );
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else if( HB_IS_NUMERIC( pItem ) )
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hb_retnd( -1 * hb_itemGetND( pItem ) );
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else if( HB_IS_LOGICAL( pItem ) )
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hb_retl( ! hb_itemGetL( pItem ) );
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}
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}
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