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pos1.c
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pos1.c
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/*
* PosAlpha(), PosLower(), PosRange() and PosUpper() CT3 string functions
*
* Copyright 1999-2001 Viktor Szakats (vszakats.net/harbour) (PosUpper())
* 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"
/* defines */
#define DO_POS1_POSALPHA 0
#define DO_POS1_POSLOWER 1
#define DO_POS1_POSRANGE 2
#define DO_POS1_POSUPPER 3
/* helper function for the posxxx() functions */
static void do_pos1( int iSwitch )
{
if( HB_ISCHAR( 1 ) && /* all functions need string as 1st param */
( iSwitch != DO_POS1_POSRANGE || /* that's the only condition for all funcs _except_ POSRANGE */
( iSwitch == DO_POS1_POSRANGE && /* In addition, POSRANGE needs .. */
HB_ISCHAR( 2 ) && /* .. string as 2nd .. */
HB_ISCHAR( 3 ) ) ) ) /* .. and 3rd param */
{
const unsigned char * pcString, * puc;
HB_SIZE sStrLen;
unsigned char ucChar1 = ' ', ucChar2 = ' ';
int iMode;
HB_SIZE sIgnore;
int iParamShift = 0;
if( iSwitch == DO_POS1_POSRANGE )
{
if( hb_parclen( 1 ) == 0 )
{
hb_retns( 0 );
return;
}
else
ucChar1 = *( hb_parc( 1 ) );
if( hb_parclen( 2 ) == 0 )
{
hb_retns( 0 );
return;
}
else
ucChar2 = *( hb_parc( 2 ) );
iParamShift += 2;
}
pcString = ( const unsigned char * ) hb_parc( iParamShift + 1 );
sStrLen = hb_parclen( iParamShift + 1 );
iMode = hb_parl( iParamShift + 2 );
sIgnore = hb_parnsdef( iParamShift + 3, 0 );
for( puc = pcString + sIgnore; puc < pcString + sStrLen; puc++ )
{
int iDoRet = 0;
switch( iSwitch )
{
case DO_POS1_POSALPHA:
iDoRet = hb_charIsAlpha( ( HB_UCHAR ) *puc );
break;
case DO_POS1_POSLOWER:
iDoRet = hb_charIsLower( ( HB_UCHAR ) *puc );
break;
case DO_POS1_POSRANGE:
iDoRet = ( ucChar1 <= *puc && ucChar2 >= *puc );
break;
case DO_POS1_POSUPPER:
iDoRet = hb_charIsUpper( ( HB_UCHAR ) *puc );
break;
}
if( ( iMode && ! iDoRet ) || ( ! iMode && iDoRet ) )
{
hb_retns( puc - pcString + 1 );
return;
}
}
hb_retns( 0 );
}
else
{
PHB_ITEM pSubst = NULL;
int iArgErrorMode = ct_getargerrormode();
if( iArgErrorMode != CT_ARGERR_IGNORE )
{
HB_ERRCODE iError = 0;
switch( iSwitch )
{
case DO_POS1_POSALPHA:
iError = CT_ERROR_POSALPHA;
break;
case DO_POS1_POSLOWER:
iError = CT_ERROR_POSLOWER;
break;
case DO_POS1_POSRANGE:
iError = CT_ERROR_POSRANGE;
break;
case DO_POS1_POSUPPER:
iError = CT_ERROR_POSUPPER;
break;
}
pSubst = ct_error_subst( ( HB_USHORT ) iArgErrorMode, EG_ARG, iError,
NULL, HB_ERR_FUNCNAME, 0,
EF_CANSUBSTITUTE, HB_ERR_ARGS_BASEPARAMS );
}
if( pSubst != NULL )
hb_itemReturnRelease( pSubst );
else
hb_retns( 0 );
}
}
HB_FUNC( POSALPHA )
{
do_pos1( DO_POS1_POSALPHA );
}
HB_FUNC( POSLOWER )
{
do_pos1( DO_POS1_POSLOWER );
}
HB_FUNC( POSRANGE )
{
do_pos1( DO_POS1_POSRANGE );
}
HB_FUNC( POSUPPER )
{
do_pos1( DO_POS1_POSUPPER );
}