232 lines
6.3 KiB
C
232 lines
6.3 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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* CT3 string function
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* - ASCPOS
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* - VALPOS
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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 <ctype.h>
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#include "ct.h"
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/* defines */
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#define DO_ASCPOS_ASCPOS 0
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#define DO_ASCPOS_VALPOS 1
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/* helper function */
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static void do_ascpos (int iSwitch)
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{
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if (ISCHAR (1))
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{
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size_t sStrSize = hb_parclen (1);
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char *pcString = hb_parc (1);
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size_t sPos;
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if (ISNUM (2))
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sPos = hb_parnl (2);
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else
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sPos = sStrSize;
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if ((sPos==0) || (sPos > sStrSize))
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{
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hb_retnl (0);
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}
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else
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{
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if (iSwitch == DO_ASCPOS_VALPOS)
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{
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if (isdigit ((size_t)pcString[sPos-1]))
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hb_retnl (pcString[sPos-1]-48);
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else
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hb_retnl (0);
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}
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else /* iSwitch == DO_ASCPOS_ASCPOS */
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{
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hb_retnl (pcString[sPos-1]);
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}
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}
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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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{
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pSubst = ct_error_subst ((USHORT)iArgErrorMode, EG_ARG,
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(iSwitch == DO_ASCPOS_VALPOS ? CT_ERROR_VALPOS : CT_ERROR_ASCPOS),
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NULL,
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(iSwitch == DO_ASCPOS_VALPOS ? "VALPOS" : "ASCPOS"),
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0, EF_CANSUBSTITUTE, 1, hb_paramError (1));
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}
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if (pSubst != NULL)
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{
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hb_itemReturn (pSubst);
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hb_itemRelease (pSubst);
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}
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else
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{
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hb_retnl (0);
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}
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}
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return;
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}
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/* $DOC$
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* $FUNCNAME$
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* ASCPOS()
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* $CATEGORY$
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* CT3 string functions
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* $ONELINER$
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* ASCII value of a character at a certain position
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* $SYNTAX$
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* ASCPOS (<cString>, [<nPosition>]) --> nAsciiValue
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* $ARGUMENTS$
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* <cString> is the processed string
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* [<nPosition>] is an optional position within <cString>
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* Default: last position in <cString>
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* $RETURNS$
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* <nAsciiValue> the ASCII value of the character at the specified
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* position
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* $DESCRIPTION$
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* The ASCPOS() function returns the ASCII value of the character that
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* can be found at the position <nPosition> in <cString>. If <nPosition>
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* is larger than the length of <cString>, 0 is returned.
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* $EXAMPLES$
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* ? ascpos ("0123456789") --> 57
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* ? ascpos ("0123456789",1) --> 48
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* $TESTS$
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* ascpos ("0123456789") == 57
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* ascpos ("0123456789",1) == 48
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* ascpos ("0123456789",11) == 0 // <nPosition> to large !
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* $STATUS$
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* Ready
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* $COMPLIANCE$
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* ASCPOS() is compatible with CT3's ASCPOS().
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* $PLATFORMS$
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* All
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* $FILES$
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* Source is asciisum.c, library is libct.
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* $SEEALSO$
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* VALPOS()
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* $END$
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*/
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HB_FUNC (ASCPOS)
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{
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do_ascpos (DO_ASCPOS_ASCPOS);
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return;
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}
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/* $DOC$
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* $FUNCNAME$
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* VALPOS()
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* $CATEGORY$
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* CT3 string functions
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* $ONELINER$
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* Numerical value of a character at a certain position
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* $SYNTAX$
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* VALPOS (<cString>, [<nPosition>]) --> nDigitValue
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* $ARGUMENTS$
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* <cString> is the processed string
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* [<nPosition>] is an optional position within <cString>
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* Default: last position in <cString>
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* $RETURNS$
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* <nDigitValue> the numerical value of the character at the specified
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* position
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* $DESCRIPTION$
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* The VALPOS() function returns the numerical value of the character that
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* can be found at the position <nPosition> in <cString>. If no digit
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* can be found at this position or if <nPosition>
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* is larger than the length of <cString>, 0 is returned.
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* $EXAMPLES$
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* ? valpos ("1234x56789") --> 9
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* ? valpos ("1234x56789",1) --> 1
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* $TESTS$
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* valpos ("1234x56789") == 9
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* valpos ("1234x56789",1) == 1
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* valpos ("1234x56789",11) == 0 // <nPosition> to large !
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* valpos ("1234x56789",5) == 0 // "x" is not a digit !
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* $STATUS$
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* Ready
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* $COMPLIANCE$
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* VALPOS() is compatible with CT3's VALPOS().
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* $PLATFORMS$
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* All
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* $FILES$
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* Source is asciisum.c, library is libct.
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* $SEEALSO$
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* ASCPOS()
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* $END$
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*/
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HB_FUNC (VALPOS)
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{
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do_ascpos (DO_ASCPOS_VALPOS);
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return;
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}
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