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116 lines
3.8 KiB
C
116 lines
3.8 KiB
C
/*
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* Harbour Project source code:
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* Stuff() function
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*
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* Copyright 2012 Przemyslaw Czerpak <druzus / at / priv.onet.pl>
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* Copyright 1999 Antonio Linares <alinares@fivetech.com>
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* www - http://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.txt. 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 "hbapicdp.h"
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/* replaces characters in a string */
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HB_FUNC( STUFF )
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{
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const char * szText = hb_parc( 1 );
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const char * szIns = hb_parc( 4 );
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if( szText && szIns && HB_ISNUM( 2 ) && HB_ISNUM( 3 ) )
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{
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PHB_CODEPAGE cdp = hb_vmCDP();
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HB_SIZE nLen = hb_parclen( 1 );
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HB_SIZE nPos = hb_parns( 2 );
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HB_SIZE nDel = hb_parns( 3 );
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HB_SIZE nIns = hb_parclen( 4 );
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HB_SIZE nTot;
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if( HB_CDP_ISCHARIDX( cdp ) )
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{
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if( nPos )
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nPos = nPos < 1 ? nLen : hb_cdpTextPos( cdp, szText, nLen, nPos - 1 );
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if( nDel )
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{
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if( nPos < nLen )
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{
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nDel = hb_cdpTextPos( cdp, szText + nPos, nLen - nPos, nDel );
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if( nDel == 0 )
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nDel = nLen - nPos;
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}
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else
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nDel = 0;
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}
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}
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else
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{
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if( nPos )
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{
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if( nPos < 1 || nPos > nLen )
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nPos = nLen;
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else
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nPos--;
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}
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if( nDel )
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{
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if( nDel < 1 || nDel > nLen - nPos )
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nDel = nLen - nPos;
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}
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}
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if( ( nTot = nLen + nIns - nDel ) > 0 )
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{
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char * szResult = ( char * ) hb_xgrab( nTot + 1 );
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hb_xmemcpy( szResult, szText, nPos );
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hb_xmemcpy( szResult + nPos, szIns, nIns );
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hb_xmemcpy( szResult + nPos + nIns, szText + nPos + nDel,
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nLen - ( nPos + nDel ) );
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hb_retclen_buffer( szResult, nTot );
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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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hb_retc_null();
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}
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