183 lines
4.7 KiB
C
183 lines
4.7 KiB
C
/*
|
|
* $Id$
|
|
*/
|
|
|
|
/*
|
|
* Harbour Project source code:
|
|
* STRSWAP() CT3 string function
|
|
*
|
|
* Copyright 2001 IntTec GmbH, Neunlindenstr 32, 79106 Freiburg, Germany
|
|
* Author: Martin Vogel <vogel@inttec.de>
|
|
*
|
|
* www - http://www.harbour-project.org
|
|
*
|
|
* 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. If not, write to
|
|
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
|
|
* Boston, MA 02111-1307 USA (or visit the web site http://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"
|
|
|
|
|
|
/* $DOC$
|
|
* $FUNCNAME$
|
|
* STRSWAP()
|
|
* $CATEGORY$
|
|
* CT3 string functions
|
|
* $ONELINER$
|
|
* Swap the contents of two strings
|
|
* $SYNTAX$
|
|
* STRSWAP (<[@]cString1>, <[@]cString2>) -> cString
|
|
* $ARGUMENTS$
|
|
* $RETURNS$
|
|
* $DESCRIPTION$
|
|
* TODO: add documentation
|
|
* $EXAMPLES$
|
|
* $TESTS$
|
|
* $STATUS$
|
|
* Started
|
|
* $COMPLIANCE$
|
|
* STRSWAP() is compatible with CT3's STRSWAP().
|
|
* $PLATFORMS$
|
|
* All
|
|
* $FILES$
|
|
* Source is strswap.c, library is libct.
|
|
* $SEEALSO$
|
|
* $END$
|
|
*/
|
|
|
|
HB_FUNC (STRSWAP)
|
|
{
|
|
|
|
size_t sStrLen1, sStrLen2;
|
|
|
|
/* param check */
|
|
if (((sStrLen1 = (size_t)hb_parclen (1)) > 0) &&
|
|
((sStrLen2 = (size_t)hb_parclen (2)) > 0))
|
|
{
|
|
|
|
/* get parameters */
|
|
char *pcString1 = (char *)hb_parc (1);
|
|
char *pcString2 = (char *)hb_parc (2);
|
|
char *pcRet1 = NULL, *pcRet2 = NULL;
|
|
int iChange1, iChange2;
|
|
size_t sIndex, sCmpLen;
|
|
|
|
if ((iChange1=ISBYREF(1)) != 0)
|
|
{
|
|
pcRet1 = ( char * )hb_xgrab (sStrLen1);
|
|
hb_xmemcpy (pcRet1, pcString1, sStrLen1);
|
|
}
|
|
|
|
if ((iChange2=ISBYREF(2)) != 0)
|
|
{
|
|
pcRet2 = ( char * )hb_xgrab (sStrLen2);
|
|
hb_xmemcpy (pcRet2, pcString2, sStrLen2);
|
|
}
|
|
|
|
sCmpLen = (sStrLen1 < sStrLen2 ? sStrLen1 : sStrLen2);
|
|
for (sIndex = 0; sIndex < sCmpLen; sIndex++)
|
|
{
|
|
char cExchange;
|
|
|
|
if (iChange1)
|
|
{
|
|
cExchange = *(pcString1+sIndex);
|
|
*(pcRet1+sIndex) = *(pcString2+sIndex);
|
|
if (iChange2)
|
|
{
|
|
*(pcRet2+sIndex) = cExchange;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
*(pcRet2+sIndex) = *(pcString1+sIndex);
|
|
}
|
|
}
|
|
|
|
/* strings */
|
|
if (iChange1)
|
|
{
|
|
hb_storclen (pcRet1, sStrLen1, 1);
|
|
hb_xfree (pcRet1);
|
|
}
|
|
|
|
if (iChange2)
|
|
{
|
|
hb_storclen (pcRet2, sStrLen2, 2);
|
|
hb_xfree (pcRet2);
|
|
}
|
|
|
|
hb_retc ("");
|
|
|
|
|
|
}
|
|
else /* ((sStrLen1 = (size_t)hb_parclen (1)) > 0) &&
|
|
((sStrLen2 = (size_t)hb_parclen (2)) > 0)) */
|
|
{
|
|
PHB_ITEM pSubst = NULL;
|
|
int iArgErrorMode = ct_getargerrormode();
|
|
if (iArgErrorMode != CT_ARGERR_IGNORE)
|
|
{
|
|
pSubst = ct_error_subst ((USHORT)iArgErrorMode, EG_ARG, CT_ERROR_STRSWAP,
|
|
NULL, "STRSWAP", 0, EF_CANSUBSTITUTE, 2,
|
|
hb_paramError (1), hb_paramError (2));
|
|
}
|
|
|
|
if (pSubst != NULL)
|
|
{
|
|
hb_itemReturn (pSubst);
|
|
hb_itemRelease (pSubst);
|
|
}
|
|
else
|
|
{
|
|
hb_retc ("");
|
|
}
|
|
return;
|
|
}
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
|