104 lines
2.8 KiB
C
104 lines
2.8 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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* __STRTOKEN() helper routine for TEDITOR.PRG
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*
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* Copyright 1999 Antonio Linares <alinares@fivetech.com>
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* Matthew Hamilton <mhamilton@bunge.com.au>
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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 "hbapi.h"
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static char * hb_strToken( char * szText, long lText,
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long lIndex,
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char cDelimiter,
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long * plLen )
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{
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long lStart;
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long lEnd = 0;
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long lCounter = 0;
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HB_TRACE(HB_TR_DEBUG, ("hb_strToken(%s, %ld, %ld, %d, %p)", szText, lText, lIndex, (int) cDelimiter, plLen));
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do
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{
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lStart = lEnd;
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if( cDelimiter != ' ' )
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{
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if( szText[ lStart ] == cDelimiter )
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lStart++;
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}
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else
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{
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while( lStart < lText && szText[ lStart ] == cDelimiter )
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lStart++;
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}
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if( lStart < lText && szText[ lStart ] != cDelimiter )
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{
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lEnd = lStart + 1;
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while( lEnd < lText && szText[lEnd] != cDelimiter )
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lEnd++;
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}
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else
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lEnd = lStart;
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}
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while( lCounter++ < lIndex - 1 && lEnd < lText );
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if( lCounter < lIndex )
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{
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*plLen = 0;
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return "";
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}
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else
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{
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*plLen = lEnd - lStart;
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return szText + lStart;
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}
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}
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/* returns the nth occurence of a substring within a token-delimited string */
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HB_FUNC( __STRTOKEN )
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{
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char * pszText;
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long lLen;
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pszText = hb_strToken( hb_parc( 1 ), hb_parclen( 1 ),
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hb_parnl( 2 ),
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ISCHAR( 3 ) ? *hb_parc( 3 ) : ' ',
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&lLen );
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hb_retclen( pszText, lLen );
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}
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