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atnum.c
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atnum.c
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/*
* CT3 string functions
* - AfterAtNum()
* - BeforAtNum()
* - AtNum()
*
* Copyright 2001 IntTec GmbH, Neunlindenstr 32, 79106 Freiburg, Germany
* Author: Martin Vogel <vogel@inttec.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING.txt. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA (or visit the web site https://www.gnu.org/).
*
* As a special exception, the Harbour Project gives permission for
* additional uses of the text contained in its release of Harbour.
*
* The exception is that, if you link the Harbour libraries with other
* files to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the Harbour library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by the Harbour
* Project under the name Harbour. If you copy code from other
* Harbour Project or Free Software Foundation releases into a copy of
* Harbour, as the General Public License permits, the exception does
* not apply to the code that you add in this way. To avoid misleading
* anyone as to the status of such modified files, you must delete
* this exception notice from them.
*
* If you write modifications of your own for Harbour, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice.
*
*/
#include "ct.h"
#define DO_ATNUM_AFTERATNUM 0
#define DO_ATNUM_BEFORATNUM 1
#define DO_ATNUM_ATNUM 2
/* helper function */
static void do_atnum( int iSwitch )
{
if( HB_ISCHAR( 1 ) && HB_ISCHAR( 2 ) )
{
const char * pcStringToMatch = hb_parc( 1 );
HB_SIZE sStrToMatchLen = hb_parclen( 1 );
const char * pcString = hb_parc( 2 );
HB_SIZE sStrLen = hb_parclen( 2 );
int iMultiPass = ct_getatmupa();
int iAtLike = ct_getatlike();
char cAtLike = ct_getatlikechar();
HB_SIZE sIgnore = hb_parnsdef( 4, 0 ); /* eventually ignore some characters */
HB_SIZE sMatchStrLen = 0;
HB_SIZE nCounter;
const char * pc = NULL;
if( sIgnore >= sStrLen )
{
switch( iSwitch )
{
case DO_ATNUM_AFTERATNUM:
{
/* AFTERATNUM */
int iArgErrorMode = ct_getargerrormode();
if( iArgErrorMode != CT_ARGERR_IGNORE )
ct_error( ( HB_USHORT ) iArgErrorMode, EG_ARG, CT_ERROR_AFTERATNUM, NULL,
HB_ERR_FUNCNAME, 0, EF_CANDEFAULT, HB_ERR_ARGS_BASEPARAMS );
hb_retc_null();
break;
}
case DO_ATNUM_BEFORATNUM:
{
/* BEFORATNUM */
int iArgErrorMode = ct_getargerrormode();
if( iArgErrorMode != CT_ARGERR_IGNORE )
ct_error( ( HB_USHORT ) iArgErrorMode, EG_ARG, CT_ERROR_BEFORATNUM, NULL,
HB_ERR_FUNCNAME, 0, EF_CANDEFAULT, HB_ERR_ARGS_BASEPARAMS );
hb_retc_null();
break;
}
case DO_ATNUM_ATNUM:
{
/* ATNUM */
int iArgErrorMode = ct_getargerrormode();
if( iArgErrorMode != CT_ARGERR_IGNORE )
ct_error( ( HB_USHORT ) iArgErrorMode, EG_ARG, CT_ERROR_ATNUM, NULL, HB_ERR_FUNCNAME, 0,
EF_CANDEFAULT, HB_ERR_ARGS_BASEPARAMS );
hb_retns( 0 );
break;
}
}
return;
}
else
{
pcString += sIgnore;
sStrLen -= sIgnore;
}
/* nth match or last match ? */
if( HB_ISNUM( 3 ) && ( nCounter = hb_parns( 3 ) ) != 0 )
{
/* find the <nCounter>th match */
const char * pcSubStr;
HB_SIZE sSubStrLen;
HB_SIZE nMatchCounter = 0;
pcSubStr = pcString;
sSubStrLen = sStrLen;
while( nMatchCounter < nCounter )
{
switch( iAtLike )
{
case CT_SETATLIKE_EXACT:
pc = ct_at_exact_forward( pcSubStr, sSubStrLen, pcStringToMatch,
sStrToMatchLen, &sMatchStrLen );
break;
case CT_SETATLIKE_WILDCARD:
pc = ct_at_wildcard_forward( pcSubStr, sSubStrLen, pcStringToMatch,
sStrToMatchLen, cAtLike, &sMatchStrLen );
break;
default:
pc = NULL;
}
if( pc == NULL )
{
/* no match found; if this happens at this point,
there are no <nCounter> matches, so return an empty string */
switch( iSwitch )
{
case DO_ATNUM_AFTERATNUM:
case DO_ATNUM_BEFORATNUM:
/* AFTERATNUM */
/* BEFORATNUM */
hb_retc_null();
break;
case DO_ATNUM_ATNUM:
/* ATNUM */
hb_retns( 0 );
break;
}
return;
}
nMatchCounter++;
if( iMultiPass )
pcSubStr = pc + 1;
else
pcSubStr = pc + sMatchStrLen;
sSubStrLen = sStrLen - ( pcSubStr - pcString );
}
}
else
{
/* we have to find the last match and return the
string after that last match */
switch( iAtLike )
{
case CT_SETATLIKE_EXACT:
pc = ct_at_exact_backward( pcString, sStrLen, pcStringToMatch,
sStrToMatchLen, &sMatchStrLen );
break;
case CT_SETATLIKE_WILDCARD:
pc = ct_at_wildcard_backward( pcString, sStrLen, pcStringToMatch,
sStrToMatchLen, cAtLike, &sMatchStrLen );
break;
default:
pc = NULL;
}
if( pc == NULL )
{
/* no matches found */
switch( iSwitch )
{
case DO_ATNUM_AFTERATNUM:
case DO_ATNUM_BEFORATNUM:
/* AFTERATNUM */
/* BEFORATNUM */
hb_retc_null();
break;
case DO_ATNUM_ATNUM:
/* ATNUM */
hb_retns( 0 );
break;
}
return;
}
}
switch( iSwitch )
{
case DO_ATNUM_AFTERATNUM:
/* AFTERATNUM */
if( pc + sMatchStrLen >= pcString + sStrLen )
hb_retc_null();
else
hb_retclen( pc + sMatchStrLen, sStrLen - ( pc + sMatchStrLen - pcString ) );
break;
case DO_ATNUM_BEFORATNUM:
/* BEFORATNUM */
hb_retclen( pcString - sIgnore, pc - ( pcString - sIgnore ) );
break;
case DO_ATNUM_ATNUM:
/* ATNUM */
#if defined( __POCC__ ) && ( __POCC__ >= 500 ) && defined( HB_OS_WIN_64 )
/* NOTE: Workaround for Pelles C 5.00.13 AMD64 mode internal error:
'fatal error: Internal error: reduce_tree()' [vszakats]. */
hb_retns( pc - pcString + sIgnore + 1 );
#else
hb_retns( pc - ( pcString - sIgnore ) + 1 );
#endif
break;
}
}
else
{
switch( iSwitch )
{
case DO_ATNUM_AFTERATNUM:
case DO_ATNUM_BEFORATNUM:
{
/* AFTERATNUM */
PHB_ITEM pSubst = NULL;
int iArgErrorMode = ct_getargerrormode();
if( iArgErrorMode != CT_ARGERR_IGNORE )
pSubst = ct_error_subst( ( HB_USHORT ) iArgErrorMode, EG_ARG,
iSwitch ==
DO_ATNUM_AFTERATNUM ? CT_ERROR_AFTERATNUM :
CT_ERROR_BEFORATNUM, NULL, HB_ERR_FUNCNAME, 0,
EF_CANSUBSTITUTE, HB_ERR_ARGS_BASEPARAMS );
if( pSubst != NULL )
hb_itemReturnRelease( pSubst );
else
hb_retc_null();
break;
}
case DO_ATNUM_ATNUM:
{
/* ATNUM */
PHB_ITEM pSubst = NULL;
int iArgErrorMode = ct_getargerrormode();
if( iArgErrorMode != CT_ARGERR_IGNORE )
pSubst = ct_error_subst( ( HB_USHORT ) iArgErrorMode, EG_ARG, CT_ERROR_ATNUM,
NULL, HB_ERR_FUNCNAME, 0, EF_CANSUBSTITUTE,
HB_ERR_ARGS_BASEPARAMS );
if( pSubst != NULL )
hb_itemReturnRelease( pSubst );
else
hb_retns( 0 );
break;
}
}
}
}
HB_FUNC( AFTERATNUM )
{
do_atnum( DO_ATNUM_AFTERATNUM );
}
HB_FUNC( BEFORATNUM )
{
do_atnum( DO_ATNUM_BEFORATNUM );
}
HB_FUNC( ATNUM )
{
do_atnum( DO_ATNUM_ATNUM );
}