105 lines
2.7 KiB
C
105 lines
2.7 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 2000 Harbour project.
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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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char *hb_strtoken(char *szText,
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long lText,
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long lIndex,
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char cDelimiter,
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long *lLen)
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{
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long wStart;
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long wEnd = 0;
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long wCounter = 0;
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HB_TRACE(HB_TR_DEBUG, ("hb_strtoken(%s, %ld, %ld, %d, %p)", szText, lText, lIndex, (int) cDelimiter, lLen));
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do
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{
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wStart = wEnd;
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if( cDelimiter != ' ' )
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{
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if( szText[wStart] == cDelimiter )
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wStart++;
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}
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else
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{
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while( wStart < lText && szText[wStart] == cDelimiter )
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wStart++;
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}
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if( wStart < lText && szText[wStart] != cDelimiter )
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{
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wEnd = wStart + 1;
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while( wEnd < lText && szText[wEnd] != cDelimiter )
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wEnd++;
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}
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else
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wEnd = wStart;
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} while( wCounter++ < lIndex - 1 && wEnd < lText );
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if( wCounter < lIndex )
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{
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*lLen = 0;
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return "";
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}
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else
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{
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*lLen = wEnd - wStart;
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return szText + wStart;
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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 *szText;
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long lIndex = hb_parnl(2);
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char cDelimiter = *hb_parc(3);
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long lLen;
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if( !cDelimiter )
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cDelimiter = ' ';
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szText = hb_strtoken(hb_parc(1), hb_parclen(1), lIndex, cDelimiter, &lLen);
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hb_stornl(lLen, 4);
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hb_retclen(szText, lLen);
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}
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