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122 lines
4.1 KiB
C
122 lines
4.1 KiB
C
/*
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* Harbour Project source code:
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* CT3 string function: CharSpread()
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*
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* Copyright 2007 Przemyslaw Czerpak <druzus / at / priv.onet.pl>
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*
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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 "hbapiitm.h"
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HB_FUNC( CHARSPREAD )
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{
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HB_SIZE nLen = hb_parclen( 1 );
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if( nLen == 0 )
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hb_retc_null();
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else
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{
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HB_ISIZ nSize = hb_parns( 2 );
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if( nSize < 0 || ( HB_SIZE ) nSize <= nLen )
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hb_itemReturn( hb_param( 1, HB_IT_ANY ) );
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else
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{
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const char * szText = hb_parc( 1 );
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char * szDest, cDelim = ' ';
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HB_ISIZ nTokens = 0, iRepl, iRest, iFirst, i;
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HB_SIZE ul, nDst, nRest;
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if( HB_ISCHAR( 3 ) )
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cDelim = hb_parc( 3 )[ 0 ];
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else if( HB_ISNUM( 3 ) )
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cDelim = ( char ) hb_parni( 3 );
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for( ul = 0; ul < nLen; ++ul )
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{
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if( szText[ ul ] == cDelim )
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{
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nTokens++;
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while( ul + 1 < nLen && szText[ ul + 1 ] == cDelim )
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++ul;
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}
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}
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if( nTokens == 0 )
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hb_itemReturn( hb_param( 1, HB_IT_ANY ) );
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else
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{
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nRest = ( HB_SIZE ) nSize - nLen;
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iRepl = nRest / nTokens;
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iRest = nRest % nTokens;
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iFirst = ( iRest + 1 ) >> 1;
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iRest >>= 1;
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szDest = ( char * ) hb_xgrab( nSize + 1 );
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for( nDst = ul = 0; ul < nLen; ++ul )
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{
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szDest[ nDst++ ] = szText[ ul ];
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if( szText[ ul ] == cDelim )
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{
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while( ul + 1 < nLen && szText[ ul + 1 ] == cDelim )
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szDest[ nDst++ ] = szText[ ++ul ];
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i = iRepl;
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if( iFirst )
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{
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--iFirst;
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++i;
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}
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else if( nTokens <= iRest )
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++i;
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while( --i >= 0 )
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szDest[ nDst++ ] = cDelim;
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nTokens--;
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}
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}
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hb_retclen_buffer( szDest, nSize );
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}
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}
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}
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}
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