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144 lines
4.2 KiB
C
144 lines
4.2 KiB
C
/*
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* Harbour Project source code:
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* RemAll(), RemLeft() and RemRight() 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://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 "ct.h"
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/* defines */
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#define DO_REMOVE_REMALL 0
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#define DO_REMOVE_REMLEFT 1
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#define DO_REMOVE_REMRIGHT 2
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static const HB_ERRCODE sulErrorSubcodes[] =
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{
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CT_ERROR_REMALL,
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CT_ERROR_REMLEFT,
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CT_ERROR_REMRIGHT
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};
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/* helper function for the remxxx functions */
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static void do_remove( int iSwitch )
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{
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/* param check */
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if( HB_ISCHAR( 1 ) )
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{
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const char * pcString = hb_parc( 1 );
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HB_SIZE sStrLen = hb_parclen( 1 );
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const char * pcRet;
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const char * pc;
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HB_SIZE sRetLen;
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char cSearch;
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if( hb_parclen( 2 ) > 0 )
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cSearch = *( hb_parc( 2 ) );
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else if( HB_ISNUM( 2 ) )
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cSearch = ( char ) ( hb_parnl( 2 ) % 256 );
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else
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cSearch = 0x20;
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sRetLen = sStrLen;
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pcRet = pcString;
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if( iSwitch != DO_REMOVE_REMRIGHT )
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{
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while( ( *pcRet == cSearch ) && ( pcRet < pcString + sStrLen ) )
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{
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pcRet++;
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sRetLen--;
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}
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}
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if( iSwitch != DO_REMOVE_REMLEFT )
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{
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pc = pcString + sStrLen - 1;
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while( ( *pc == cSearch ) && ( pc >= pcRet ) )
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{
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pc--;
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sRetLen--;
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}
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}
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if( sRetLen == 0 )
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hb_retc_null();
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else
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hb_retclen( pcRet, sRetLen );
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}
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else
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{
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PHB_ITEM pSubst = NULL;
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int iArgErrorMode = ct_getargerrormode();
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if( iArgErrorMode != CT_ARGERR_IGNORE )
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pSubst = ct_error_subst( ( HB_USHORT ) iArgErrorMode, EG_ARG,
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sulErrorSubcodes[ iSwitch ],
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NULL, HB_ERR_FUNCNAME, 0,
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EF_CANSUBSTITUTE, HB_ERR_ARGS_BASEPARAMS );
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if( pSubst != NULL )
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hb_itemReturnRelease( pSubst );
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else
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hb_retc_null();
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}
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}
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HB_FUNC( REMALL )
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{
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do_remove( DO_REMOVE_REMALL );
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}
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HB_FUNC( REMLEFT )
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{
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do_remove( DO_REMOVE_REMLEFT );
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}
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HB_FUNC( REMRIGHT )
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{
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do_remove( DO_REMOVE_REMRIGHT );
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}
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