230 lines
6.2 KiB
C
230 lines
6.2 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 functions
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* - CHAREVEN()
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* - CHARODD()
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*
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* Copyright 2000-2001 Viktor Szakats <viktor.szakats@syenar.hu>
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*
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* Merged into one file for optimization and some small corrections:
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* (c) 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 "ct.h"
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#define DO_CHAREVOD_CHAREVEN 0
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#define DO_CHAREVOD_CHARODD 1
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/* helper function */
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static void do_charevod (int iSwitch)
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{
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if (ISCHAR (1))
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{
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char *pcString = hb_parc (1);
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size_t sLen = hb_parclen (1);
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char *pcResult;
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size_t sPos, sResultPos;
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if (sLen == 0)
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{
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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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ct_error ((USHORT)iArgErrorMode, EG_ARG,
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(iSwitch == DO_CHAREVOD_CHAREVEN ? CT_ERROR_CHAREVEN : CT_ERROR_CHARODD),
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NULL,
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(iSwitch == DO_CHAREVOD_CHAREVEN ? "CHAREVEN" : "CHARODD"),
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0, EF_CANDEFAULT, 1, hb_paramError (1));
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}
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hb_retc ("");
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return;
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}
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pcResult = ( char * ) hb_xgrab ((sLen+1)/2);
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if (iSwitch == DO_CHAREVOD_CHAREVEN)
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sPos = 1;
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else
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sPos = 0;
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sResultPos = 0;
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for (; sPos < sLen; sPos+=2)
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pcResult[sResultPos++] = pcString[sPos];
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if (sResultPos == 0)
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hb_retc ("");
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else
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hb_retclen (pcResult, sResultPos);
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hb_xfree (pcResult);
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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_CHAREVOD_CHAREVEN ? CT_ERROR_CHAREVEN : CT_ERROR_CHARODD),
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NULL,
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(iSwitch == DO_CHAREVOD_CHAREVEN ? "CHAREVEN" : "CHARODD"),
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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_retc ("");
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}
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}
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}
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/* $DOC$
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* $FUNCNAME$
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* CHAREVEN()
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* $CATEGORY$
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* CT3 string functions
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* $ONELINER$
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* Returns the characters on the even positions in a string
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* $SYNTAX$
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* CHAREVEN (<cString>) --> cEvenString
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* $ARGUMENTS$
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* <cString> processed string
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* $RETURNS$
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* <cEvenString> a string containing all character from even positions
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* in <cString>
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* $DESCRIPTION$
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* The CHAREVEN() function looks for the characters on the even positions
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* in a given string, collects them and returns them as a string.
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* $EXAMPLES$
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* ? CHAREVEN (" H E L L O !") -> "HELLO!"
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* $TESTS$
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* CHAREVEN (" 1 2 3 4 5") == "12345"
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* CHAREVEN (" 1 2 3 4 ") == "1234"
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* CHAREVEN (" ") == ""
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* $STATUS$
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* Ready
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* $COMPLIANCE$
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* CHAREVEN() is compatible with CT3's CHAREVEN().
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* $PLATFORMS$
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* All
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* $FILES$
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* Source is charevod.c, library is ct3.
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* $SEEALSO$
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* CHARODD() CHARMIX()
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* $END$
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*/
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HB_FUNC (CHAREVEN)
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{
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do_charevod (DO_CHAREVOD_CHAREVEN);
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return;
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}
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/* $DOC$
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* $FUNCNAME$
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* CHARODD()
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* $CATEGORY$
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* CT3 string functions
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* $ONELINER$
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* Returns the characters on the odd positions in a string
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* $SYNTAX$
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* CHARODD (<cString>) --> cOddString
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* $ARGUMENTS$
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* <cString> processed string
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* $RETURNS$
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* <cOddString> a string containing all character from odd positions
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* in <cString>
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* $DESCRIPTION$
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* The CHARODD() function looks for the characters on the odd positions
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* in a given string, collects them and returns them as a string.
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* $EXAMPLES$
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* ? CHARODD ("H E L L O ! ") -> "HELLO!"
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* $TESTS$
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* CHARODD ("1A2B3C4D5E") == "12345"
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* CHARODD ("1A2B3C4D5") == "12345"
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* $STATUS$
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* Ready
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* $COMPLIANCE$
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* CHARODD() is compatible with CT3's CHARODD().
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* $PLATFORMS$
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* All
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* $FILES$
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* Source is charevod.c, library is ct3.
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* $SEEALSO$
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* CHAREVEN() CHARMIX()
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* $END$
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*/
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HB_FUNC (CHARODD)
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{
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do_charevod (DO_CHAREVOD_CHARODD);
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return;
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}
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