81c9b0506c
* contrib/*
* Deleted 'www.' from harbour-project.org website name.
(www.harbour-project.org -> harbour-project.org)
243 lines
7.0 KiB
C
243 lines
7.0 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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* ATSKIPSTRINGS(), ATI() functions
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*
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* Copyright 1999 Antonio Linares <alinares@fivetech.com>
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* Copyright 1999-2001 Viktor Szakats (harbour.01 syenar.hu)
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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. 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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#include "hbapierr.h"
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/* locates a substring in a string */
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HB_SIZE hb_AtSkipStrings( const char * szSub, HB_SIZE ulSubLen, const char * szText, HB_SIZE ulLen )
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{
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char cLastChar = ' ';
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HB_TRACE(HB_TR_DEBUG, ("hb_AtSkipStrings(%s, %lu, %s, %lu)", szSub, ulSubLen, szText, ulLen));
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if( ulSubLen > 0 && ulLen >= ulSubLen )
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{
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HB_SIZE ulPos = 0;
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HB_SIZE ulSubPos = 0;
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while( ulPos < ulLen && ulSubPos < ulSubLen )
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{
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if( szText[ ulPos ] == '"' && szSub[0] != '"' )
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{
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while( ++ulPos < ulLen && szText[ ulPos ] != '"' )
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{
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/* Skip. */
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}
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ulPos++;
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ulSubPos = 0;
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continue;
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}
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if( szText[ ulPos ] == '\'' && szSub[0] != '\'' )
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{
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while( ++ulPos < ulLen && szText[ ulPos ] != '\'' )
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{
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/* Skip. */
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}
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ulPos++;
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ulSubPos = 0;
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continue;
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}
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if( szText[ ulPos ] == '[' && szSub[0] != '[' )
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{
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if( ! ( HB_ISALPHA( (HB_BYTE) cLastChar ) || HB_ISDIGIT( (HB_BYTE) cLastChar ) || strchr( "])}_.", cLastChar ) ) )
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{
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while( ++ulPos < ulLen && szText[ ulPos ] != ']' )
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{
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/* Skip. */
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}
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ulPos++;
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ulSubPos = 0;
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continue;
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}
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}
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if( szText[ ulPos ] == szSub[ ulSubPos ] )
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{
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ulSubPos++;
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ulPos++;
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}
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else if( ulSubPos )
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{
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/* Go back to the first character after the first match,
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or else tests like "22345" $ "012223456789" will fail. */
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ulPos -= ( ulSubPos - 1 );
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ulSubPos = 0;
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}
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else
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{
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cLastChar = szText[ ulPos ];
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ulPos++;
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}
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}
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return ( ulSubPos < ulSubLen ) ? 0 : ( ulPos - ulSubLen + 1 );
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}
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else
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{
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return 0;
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}
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}
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HB_FUNC( ATSKIPSTRINGS ) /* cFind, cWhere, nStart */
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{
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PHB_ITEM pFind = hb_param( 1, HB_IT_STRING ), pWhere = hb_param( 2, HB_IT_STRING );
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if( pFind && pWhere )
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{
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HB_SIZE ulStart = ( HB_SIZE ) hb_parnl(3);
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if( ulStart > 0 )
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ulStart--;
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if( ulStart < hb_itemGetCLen( pWhere ) )
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{
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HB_SIZE ulRet;
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ulRet = hb_AtSkipStrings( hb_itemGetCPtr( pFind ), hb_itemGetCLen( pFind ),
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hb_itemGetCPtr( pWhere ) + ulStart, hb_itemGetCLen( pWhere ) - ulStart );
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if( ulRet )
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{
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hb_retnl( ulRet + ulStart );
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return;
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}
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}
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}
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hb_retnl( 0 );
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}
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/* Case insensitive hb_strAt() function */
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static HB_SIZE hb_strAtI( const char * szSub, HB_SIZE ulSubLen, const char * szText, HB_SIZE ulLen )
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{
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HB_TRACE(HB_TR_DEBUG, ("hb_strAtI(%s, %lu, %s, %lu)", szSub, ulSubLen, szText, ulLen));
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if( ulSubLen > 0 && ulLen >= ulSubLen )
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{
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HB_SIZE ulPos = 0;
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HB_SIZE ulSubPos = 0;
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while( ulPos < ulLen && ulSubPos < ulSubLen )
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{
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if( HB_TOLOWER( ( HB_BYTE ) szText[ ulPos ] ) == HB_TOLOWER( ( HB_BYTE ) szSub[ ulSubPos ] ) )
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{
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ulSubPos++;
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ulPos++;
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}
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else if( ulSubPos )
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{
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/* Go back to the first character after the first match,
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or else tests like "22345" $ "012223456789" will fail. */
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ulPos -= ( ulSubPos - 1 );
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ulSubPos = 0;
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}
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else
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ulPos++;
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}
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return ( ulSubPos < ulSubLen ) ? 0 : ( ulPos - ulSubLen + 1 );
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}
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else
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return 0;
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}
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/* Case insensitive At() function */
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HB_FUNC( ATI )
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{
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PHB_ITEM pSub = hb_param( 1, HB_IT_STRING );
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PHB_ITEM pText = hb_param( 2, HB_IT_STRING );
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if( pText && pSub )
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{
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PHB_ITEM pStart = hb_param( 3, HB_IT_NUMERIC );
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PHB_ITEM pEnd = hb_param( 4, HB_IT_NUMERIC );
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HB_ISIZ lLen = hb_itemGetCLen( pText );
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HB_ISIZ lStart = pStart ? hb_itemGetNL( pStart ) : 1;
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HB_ISIZ lEnd = pEnd ? hb_itemGetNL( pEnd ) : lLen;
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HB_SIZE ulPos;
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if( lStart < 0 )
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{
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lStart += lLen;
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if( lStart < 0 )
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lStart = 0;
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}
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else if( lStart )
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lStart--;
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if( lEnd < 0 )
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lEnd += lLen + 1;
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if( lEnd > lLen )
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lEnd = lLen;
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/* Stop searching if starting past beyond end. */
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if( lStart >= lEnd )
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hb_retnl( 0 );
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else
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{
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ulPos = hb_strAtI( hb_itemGetCPtr( pSub ), hb_itemGetCLen( pSub ),
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hb_itemGetCPtr( pText ) + lStart, lEnd - lStart );
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hb_retnl( ulPos ? ulPos + lStart : 0 );
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}
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}
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else
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hb_errRT_BASE_SubstR( EG_ARG, 1108, NULL, HB_ERR_FUNCNAME, HB_ERR_ARGS_BASEPARAMS );
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}
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