365 lines
10 KiB
C
365 lines
10 KiB
C
/*
|
|
* $Id$
|
|
*/
|
|
|
|
/*
|
|
* Harbour Project source code:
|
|
* CT3 string functions
|
|
* - CHARONE()
|
|
* - WORDONE()
|
|
*
|
|
* 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"
|
|
|
|
|
|
/* defines */
|
|
#define DO_CHARONE_CHARONE 0
|
|
#define DO_CHARONE_WORDONE 1
|
|
|
|
/* helper function for the *one functions */
|
|
static void do_charone (int iSwitch)
|
|
{
|
|
|
|
char *pcString;
|
|
size_t sStrLen;
|
|
char *pcDeleteSet;
|
|
size_t sDeleteSetLen;
|
|
|
|
/* param check */
|
|
if (ISCHAR (1))
|
|
{
|
|
|
|
if (ISCHAR (2))
|
|
{
|
|
pcString = hb_parc (2);
|
|
sStrLen = (size_t)hb_parclen (2);
|
|
pcDeleteSet = hb_parc (1);
|
|
sDeleteSetLen = (size_t)hb_parclen (1);
|
|
}
|
|
else
|
|
{
|
|
pcString = hb_parc (1);
|
|
sStrLen = (size_t)hb_parclen (1);
|
|
pcDeleteSet = NULL;
|
|
sDeleteSetLen = 0;
|
|
}
|
|
|
|
switch (iSwitch)
|
|
{
|
|
case DO_CHARONE_CHARONE:
|
|
{
|
|
if (sStrLen > 1)
|
|
{
|
|
|
|
char *pcSub;
|
|
char *pcRet;
|
|
size_t sRetStrLen = 0;
|
|
char cCurrent = *pcString;
|
|
int iDoDelete = 1;
|
|
|
|
pcRet = ( char * ) hb_xgrab (sStrLen);
|
|
|
|
/* copy first char */
|
|
*(pcRet+sRetStrLen) = cCurrent;
|
|
sRetStrLen++;
|
|
|
|
for (pcSub = pcString+1; pcSub<pcString+sStrLen; pcSub++)
|
|
{
|
|
if (*pcSub != cCurrent)
|
|
{
|
|
char *pc;
|
|
/* "new" character */
|
|
cCurrent = *pcSub;
|
|
*(pcRet+sRetStrLen) = cCurrent;
|
|
sRetStrLen++;
|
|
|
|
/* check if it should be deleted */
|
|
if (pcDeleteSet == NULL)
|
|
{
|
|
iDoDelete = 1;
|
|
}
|
|
else
|
|
{
|
|
pc = ct_at_exact_forward (pcDeleteSet, sDeleteSetLen,
|
|
pcSub, 1, NULL);
|
|
if (pc != NULL)
|
|
iDoDelete = 1;
|
|
else
|
|
iDoDelete = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (!iDoDelete)
|
|
{
|
|
*(pcRet+sRetStrLen) = cCurrent;
|
|
sRetStrLen++;
|
|
}
|
|
}
|
|
}
|
|
|
|
hb_retclen (pcRet, sRetStrLen);
|
|
hb_xfree (pcRet);
|
|
|
|
}
|
|
else /* if (sStrLen > 1) */
|
|
{
|
|
/* algorithm does nothing to 1-char-strings */
|
|
hb_retclen (pcString, sStrLen);
|
|
}
|
|
}; break;
|
|
|
|
case DO_CHARONE_WORDONE:
|
|
{
|
|
if (sStrLen > 3)
|
|
{
|
|
char *pcSub;
|
|
char *pcRet;
|
|
size_t sRetStrLen = 0;
|
|
char cCurrent1 = *pcString;
|
|
char cCurrent2 = *(pcString+1);
|
|
int iDoDelete = 1;
|
|
|
|
pcRet = ( char * ) hb_xgrab (sStrLen);
|
|
/* copy first double char */
|
|
*(pcRet+sRetStrLen) = cCurrent1;
|
|
*(pcRet+sRetStrLen+1) = cCurrent2;
|
|
sRetStrLen += 2;
|
|
|
|
for (pcSub = pcString+2; pcSub<(pcString+sStrLen-1); pcSub+=2)
|
|
{
|
|
if (!((*pcSub == cCurrent1) && (*(pcSub+1) == cCurrent2)))
|
|
{
|
|
char *pc;
|
|
/* "new" character */
|
|
cCurrent1 = *pcSub;
|
|
cCurrent2 = *(pcSub+1);
|
|
*(pcRet+sRetStrLen) = cCurrent1;
|
|
*(pcRet+sRetStrLen+1) = cCurrent2;
|
|
sRetStrLen += 2;
|
|
|
|
/* check if it should be deleted */
|
|
if (pcDeleteSet == NULL)
|
|
{
|
|
iDoDelete = 1;
|
|
}
|
|
else
|
|
{
|
|
pc = ct_at_exact_forward (pcDeleteSet, sDeleteSetLen,
|
|
pcSub, 2, NULL);
|
|
if ((pc != NULL) && (((pc-pcDeleteSet)%2) == 0))
|
|
iDoDelete = 1;
|
|
else
|
|
iDoDelete = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (!iDoDelete)
|
|
{
|
|
*(pcRet+sRetStrLen) = cCurrent1;
|
|
*(pcRet+sRetStrLen+1) = cCurrent2;
|
|
sRetStrLen += 2;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* copy last character if string len is odd */
|
|
if (sStrLen%2==1)
|
|
{
|
|
*(pcRet+sRetStrLen) = *(pcString+sStrLen-1);
|
|
sRetStrLen++;
|
|
}
|
|
hb_retclen (pcRet, sRetStrLen);
|
|
hb_xfree (pcRet);
|
|
|
|
}
|
|
else /* if (sStrLen > 3) */
|
|
{
|
|
/* algorithm does nothing to 3-char-strings */
|
|
hb_retclen (pcString, sStrLen);
|
|
}
|
|
|
|
}; break;
|
|
|
|
} /* switch (iSwitch) */
|
|
|
|
}
|
|
else /* if (ISCHAR (1)) */
|
|
{
|
|
PHB_ITEM pSubst = NULL;
|
|
int iArgErrorMode = ct_getargerrormode();
|
|
if (iArgErrorMode != CT_ARGERR_IGNORE)
|
|
{
|
|
pSubst = ct_error_subst ((USHORT)iArgErrorMode, EG_ARG,
|
|
(iSwitch == DO_CHARONE_CHARONE ? CT_ERROR_CHARONE : CT_ERROR_WORDONE),
|
|
NULL,
|
|
(iSwitch == DO_CHARONE_CHARONE ? "CHARONE" : "WORDONE"),
|
|
0, EF_CANSUBSTITUTE, 2,
|
|
hb_paramError (1), hb_paramError (2));
|
|
}
|
|
|
|
if (pSubst != NULL)
|
|
{
|
|
hb_itemReturn (pSubst);
|
|
hb_itemRelease (pSubst);
|
|
}
|
|
else
|
|
{
|
|
hb_retc ("");
|
|
}
|
|
}
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
/* $DOC$
|
|
* $FUNCNAME$
|
|
* CHARONE()
|
|
* $CATEGORY$
|
|
* CT3 string functions
|
|
* $ONELINER$
|
|
* Reduce multiple occurences of a character to one
|
|
* $SYNTAX$
|
|
* CHARONE ([<cCharactersToReduce>,] <cString>) -> cReducedString
|
|
* $ARGUMENTS$
|
|
* [<cCharactersToReduce>] specifies the characters the multiple
|
|
* occurences of which should be reduced to one
|
|
* Default: All characters.
|
|
* <cString> specifies the processed string
|
|
* $RETURNS$
|
|
* <cReducedString> the string with the reduced occurences
|
|
* $DESCRIPTION$
|
|
* The CHARONE() function reduces multiple occurences of characters in
|
|
* <cString> to a single one. It is important to note that the multiple
|
|
* occurences must occur directly one behind the other. This behaviour is
|
|
* is in contrast to the CHARLIST() function.
|
|
* $EXAMPLES$
|
|
* ? CHARONE("122333a123") // "123a123"
|
|
* ? CHARONE("A B CCCD") // "A B CD"
|
|
* ? CHARONE(" ", "A B A B") // "A B A B"
|
|
* ? CHARONE("o", "122oooB12o") // "122oB12o"
|
|
* $TESTS$
|
|
* CHARONE("122333a123") == "123a123"
|
|
* CHARONE("A B CCCD") == "A B CD"
|
|
* CHARONE(" ", "A B A B") == "A B A B"
|
|
* CHARONE("o", "122oooB12o") == "122oB12o"
|
|
* $STATUS$
|
|
* Ready
|
|
* $COMPLIANCE$
|
|
* CHARONE() is compatible with CT3's CHARONE().
|
|
* $PLATFORMS$
|
|
* All
|
|
* $FILES$
|
|
* Source is charone.c, library is ct3.
|
|
* $SEEALSO$
|
|
* CHARREM() WORDONE()
|
|
* $END$
|
|
*/
|
|
|
|
HB_FUNC (CHARONE)
|
|
{
|
|
|
|
do_charone (DO_CHARONE_CHARONE);
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
/* $DOC$
|
|
* $FUNCNAME$
|
|
* WORDONE()
|
|
* $CATEGORY$
|
|
* CT3 string functions
|
|
* $ONELINER$
|
|
* Reduce multiple occurences of a double character to one
|
|
* $SYNTAX$
|
|
* WORDONE ([<cDoubleCharactersToReduce>,] <cString>) -> cReducedString
|
|
* $ARGUMENTS$
|
|
* [<cDoubleCharactersToReduce>] specifies the double characters the multiple
|
|
* occurences of which should be reduced to one
|
|
* Default: All characters.
|
|
* <cString> specifies the processed string
|
|
* $RETURNS$
|
|
* <cReducedString> the string with the reduced occurences
|
|
* $DESCRIPTION$
|
|
* The WORDONE() function reduces multiple occurences of double characters in
|
|
* <cString> to a single one. It is important to note that the multiple
|
|
* occurences must occur directly one behind the other.
|
|
* $EXAMPLES$
|
|
* ? WORDONE("12ABAB12") // "12AB12"
|
|
* ? WORDONE("1AAAA2") // "1AAAA2"
|
|
* ? WORDONE("12", "1212ABAB") // "12ABAB"
|
|
* $TESTS$
|
|
* WORDONE("12ABAB12") == "12AB12"
|
|
* WORDONE("1AAAA2") == "1AAAA2"
|
|
* WORDONE("12", "1212ABAB") == "12ABAB"
|
|
* $STATUS$
|
|
* Ready
|
|
* $COMPLIANCE$
|
|
* WORDONE() is compatible with CT3's WORDONE().
|
|
* $PLATFORMS$
|
|
* All
|
|
* $FILES$
|
|
* Source is charone.c, library is ct3.
|
|
* $SEEALSO$
|
|
* CHARONE() CHARREM()
|
|
* $END$
|
|
*/
|
|
|
|
HB_FUNC (WORDONE)
|
|
{
|
|
|
|
do_charone (DO_CHARONE_WORDONE);
|
|
return;
|
|
|
|
}
|