279 lines
8.0 KiB
C
279 lines
8.0 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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* internal functions for CT3 string functions
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*
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* Copyright 2001 IntTec GmbH, Neunlindenstr 32, 79106 Freiburg, Germany
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* Author: Martin Vogel <vogel@inttec.de>
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*
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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 "ct.h"
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/* -------------------------- */
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/* search for exact substring */
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/* -------------------------- */
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char *ct_at_exact_forward (char *pcString, size_t sStrLen,
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char *pcMatch, size_t sMatchLen,
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size_t *psMatchStrLen)
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{
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size_t sPos;
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HB_TRACE(HB_TR_DEBUG, ("ct_at_exact_forward (\"%s\", %u, \"%s\", %u, %p)",
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pcString, sStrlen, pcMatch, sMatchLen, psMatchStrLen));
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if ((sMatchLen == 0) || (sStrLen < sMatchLen))
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return (NULL);
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sPos = hb_strAt (pcMatch, sMatchLen, pcString, sStrLen);
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if (sPos == 0)
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{
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return (NULL);
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}
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else
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{
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if (psMatchStrLen != NULL)
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*psMatchStrLen = sMatchLen;
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return (pcString+sPos-1);
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}
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}
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/* ------------------------------------------------ */
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/* search for exact substring in backward direction */
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/* ------------------------------------------------ */
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char *ct_at_exact_backward (char *pcString, size_t sStrLen,
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char *pcMatch, size_t sMatchLen,
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size_t *psMatchStrLen)
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{
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size_t sIndex;
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char *pcRet;
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HB_TRACE(HB_TR_DEBUG, ("ct_at_exact_backward (\"%s\", %u, \"%s\", %u, %p)",
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pcString, sStrLen, pcMatch, sMatchLen, psMatchStrLen));
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if ((sMatchLen == 0) || (sStrLen < sMatchLen))
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return (NULL);
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for (pcRet = pcString+sStrLen-sMatchLen; pcRet >= pcString; pcRet--)
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{
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for (sIndex = 0; sIndex < sMatchLen; sIndex++)
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if (*(pcRet+sIndex) != *(pcMatch+sIndex))
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break;
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if (sIndex == sMatchLen)
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{
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/* last match found */
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if (psMatchStrLen != NULL)
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*psMatchStrLen = sMatchLen;
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return (pcRet);
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}
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}
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return (NULL);
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}
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/* ----------------------------------- */
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/* search for substring using wildcard */
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/* ----------------------------------- */
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char *ct_at_wildcard_forward (char *pcString, size_t sStrLen,
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char *pcMatch, size_t sMatchLen,
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char cWildCard, size_t *psMatchStrLen)
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{
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size_t sIndex;
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char *pcRet, *pcStop;
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HB_TRACE(HB_TR_DEBUG, ("ct_at_wildcard_forward (\"%s\", %u, \"%s\", %u, \'%c\', %p)",
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pcString, sStrLen, pcMatch, sMatchLen, cWildCard, psMatchStrLen));
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if ((sMatchLen == 0) || (sStrLen < sMatchLen))
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return (NULL);
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pcStop = pcString+sStrLen-sMatchLen;
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for (pcRet = pcString; pcRet < pcStop; pcRet++)
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{
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for (sIndex = 0; sIndex < sMatchLen; sIndex++)
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{
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char c = *(pcMatch+sIndex);
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if ((c != cWildCard) && (c != *(pcRet+sIndex)))
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break;
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}
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if (sIndex == sMatchLen)
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{
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if (psMatchStrLen != NULL)
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*psMatchStrLen = sMatchLen;
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return (pcRet);
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}
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}
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return (NULL);
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}
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/* --------------------------------------------------------- */
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/* search for substring using wildcard in backward direction */
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/* --------------------------------------------------------- */
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char *ct_at_wildcard_backward (char *pcString, size_t sStrLen,
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char *pcMatch, size_t sMatchLen,
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char cWildCard, size_t *psMatchStrLen)
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{
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size_t sIndex;
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char *pcRet;
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HB_TRACE(HB_TR_DEBUG, ("ct_at_wildcard_backward (\"%s\", %u, \"%s\", %u, \'%c\', %p)",
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pcString, sStrLen, pcMatch, sMatchLen, cWildCard, psMatchStrLen));
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if ((sMatchLen == 0) || (sStrLen < sMatchLen))
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return (NULL);
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for (pcRet = pcString+sStrLen-sMatchLen; pcRet >= pcString; pcRet--)
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{
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for (sIndex = 0; sIndex < sMatchLen; sIndex++)
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{
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char c = *(pcMatch+sIndex);
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if ((c != cWildCard) && (c != *(pcRet+sIndex)))
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break;
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}
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if (sIndex == sMatchLen)
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{
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/* last match found */
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if (psMatchStrLen != NULL)
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*psMatchStrLen = sMatchLen;
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return (pcRet);
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}
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}
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return (NULL);
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}
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/* ------------------------------- */
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/* search for character from a set */
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/* ------------------------------- */
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char *ct_at_charset_forward (char *pcString, size_t sStrLen,
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char *pcCharSet, size_t sCharSetLen,
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size_t *psMatchedCharPos)
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{
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char *pcRet, *pcSet, *pcStop1, *pcStop2;
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HB_TRACE(HB_TR_DEBUG, ("ct_at_charset_forward (\"%s\", %u, \"%s\", %u, %p)",
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pcString, sStrlen, pcCharSet, sCharSetLen, psMatchedCharPos));
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*(psMatchedCharPos) = sCharSetLen;
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if ((sCharSetLen == 0) || (sStrLen == 0))
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return (NULL);
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pcStop1 = pcString+sStrLen;
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pcStop2 = pcCharSet+sCharSetLen;
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for (pcRet = pcString; pcRet < pcStop1; pcRet++)
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{
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for (pcSet = pcCharSet; pcSet < pcStop2; pcSet++)
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if (*pcSet == *pcRet)
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{
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if (psMatchedCharPos != NULL)
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*(psMatchedCharPos) = pcSet-pcCharSet;
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return (pcRet);
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}
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}
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return (NULL);
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}
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/* ----------------------------------------------------- */
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/* search for character from a set in backward direction */
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/* ----------------------------------------------------- */
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char *ct_at_charset_backward (char *pcString, size_t sStrLen,
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char *pcCharSet, size_t sCharSetLen,
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size_t *psMatchedCharPos)
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{
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char *pcRet, *pcSet, *pcStop;
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HB_TRACE(HB_TR_DEBUG, ("ct_at_charset_backward (\"%s\", %u, \"%s\", %u, %p)",
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pcString, sStrlen, pcCharSet, sCharSetLen, psMatchedCharPos));
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*(psMatchedCharPos) = sCharSetLen;
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if ((sCharSetLen == 0) || (sStrLen == 0))
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return (NULL);
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pcStop = pcCharSet+sCharSetLen;
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for (pcRet = pcString+sStrLen-1; pcRet >= pcString; pcRet--)
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{
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for (pcSet = pcCharSet; pcSet < pcStop; pcSet++)
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if (*pcSet == *pcRet)
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{
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if (psMatchedCharPos != NULL)
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*(psMatchedCharPos) = pcSet-pcCharSet;
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return (pcRet);
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}
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}
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return (NULL);
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}
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