385 lines
10 KiB
C
385 lines
10 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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* - CHARLIST()
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* - CHARSLIST() (NEW)
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* - CHARNOLIST()
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* - CHARHIST() (NEW)
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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 "ct.h"
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/* defines */
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#define DO_LIST_CHARLIST 0
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#define DO_LIST_CHARNOLIST 1
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#define DO_LIST_CHARHIST 2
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#define DO_LIST_CHARSLIST 3
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/* helper function for the list function */
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static void do_list (int iSwitch)
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{
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char *pcString;
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size_t sStrLen;
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size_t asCharCnt[256];
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size_t sCnt;
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/* init asCharCnt */
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for (sCnt = 0; sCnt < 256; sCnt++)
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{
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asCharCnt[sCnt] = 0;
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}
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/* init params */
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if (ISCHAR (1))
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{
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pcString = hb_parc (1);
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sStrLen = (size_t)hb_parclen (1);
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}
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else
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{
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pcString = "";
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sStrLen = 0;
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}
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/* count characters */
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if (iSwitch == DO_LIST_CHARLIST)
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{
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char pcRet[256];
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size_t sRetStrLen = 0;
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for (sCnt = 0; sCnt < sStrLen; sCnt++)
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{
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if (asCharCnt[(size_t)(pcString[sCnt])] == 0)
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{
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pcRet[sRetStrLen++] = pcString[sCnt];
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asCharCnt[(size_t)(pcString[sCnt])] = 1;
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}
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}
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hb_retclen (pcRet, sRetStrLen);
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}
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else
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{
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for (sCnt = 0; sCnt < sStrLen; sCnt++)
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{
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size_t sIndex = (size_t)(unsigned char)(*(pcString+sCnt));
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asCharCnt[sIndex] = asCharCnt[sIndex]+1;
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}
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switch (iSwitch)
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{
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case DO_LIST_CHARSLIST:
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{
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char *pcRet;
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size_t sRetStrLen = 0;
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pcRet = ( char *) hb_xgrab (256);
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for (sCnt = 0; sCnt < 256; sCnt++)
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{
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if (asCharCnt[sCnt] != 0)
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{
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*(pcRet+sRetStrLen) = (unsigned char)sCnt;
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sRetStrLen++;
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}
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}
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hb_retclen (pcRet, sRetStrLen);
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hb_xfree (pcRet);
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}; break;
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case DO_LIST_CHARNOLIST:
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{
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char *pcRet;
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size_t sRetStrLen = 0;
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pcRet = ( char * ) hb_xgrab (256);
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for (sCnt = 0; sCnt < 256; sCnt++)
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{
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if (asCharCnt[sCnt] == 0)
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{
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*(pcRet+sRetStrLen) = (unsigned char)sCnt;
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sRetStrLen++;
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}
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}
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hb_retclen (pcRet, sRetStrLen);
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hb_xfree (pcRet);
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}; break;
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case DO_LIST_CHARHIST:
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{
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PHB_ITEM pArray, pCount;
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pArray = hb_itemArrayNew (256);
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for (sCnt = 0; sCnt < 256; sCnt++)
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{
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pCount = hb_itemPutNL (NULL, asCharCnt[sCnt]);
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hb_itemArrayPut (pArray, sCnt+1, pCount);
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hb_itemRelease (pCount);
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}
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hb_itemReturn (pArray);
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hb_itemRelease (pArray);
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}; break;
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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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* CHARLIST()
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* $CATEGORY$
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* CT3 string functions
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* $ONELINER$
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* Generates a list of all characters in a string
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* $SYNTAX$
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* CHARLIST ([<cString>]) -> cCharacterList
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* $ARGUMENTS$
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* [<cString>] is the string for whom the function generates a list
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* of all characters
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* Default: "" (empty string)
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* $RETURNS$
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* <cCharacterList> a list of the characters in <cString>
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* $DESCRIPTION$
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* The CHARLIST() function generates a list of those characters that
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* are contained in <cString>. This list can contain each character
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* only once, so that its maximum length is 256. The list lists those
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* characters first that are occuring in <cString> first.
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* $EXAMPLES$
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* ? charlist ("Hello World !") --> "Helo Wrd!"
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* $TESTS$
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* charlist ("Hello World !") == "Helo Wrd!"
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* charlist (nil) == ""
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* $STATUS$
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* Ready
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* $COMPLIANCE$
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* CHARLIST() is compatible with CT3's CHARLIST().
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* $PLATFORMS$
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* All
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* $FILES$
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* Source is charlist.c, library is libct.
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* $SEEALSO$
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* CHARNOLIST(),CHARSLIST(),CHARHIST()
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* $END$
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*/
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HB_FUNC (CHARLIST)
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{
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do_list (DO_LIST_CHARLIST);
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return;
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}
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/* $DOC$
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* $FUNCNAME$
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* CHARSLIST()
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* $CATEGORY$
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* CT3 string functions
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* $ONELINER$
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* Generates a sorted list of all characters in a string
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* $SYNTAX$
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* CHARSLIST ([<cString>]) -> cSortedCharacterList
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* $ARGUMENTS$
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* [<cString>] is the string for whom the function generates a
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* sorted list of all characters
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* Default: "" (empty string)
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* $RETURNS$
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* <cSortedCharacterList> a sorted list of the characters in <cString>
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* $DESCRIPTION$
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* The CHARLIST() function generates a sorted list of those characters that
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* are contained in <cString>. This list can contain each character
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* only once, so that its maximum length is 256. The function
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* gives the same result as CHARSORT(CHARLIST(<cString>))
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* $EXAMPLES$
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* ? charslist ("Hello World !") --> " !HWdelor"
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* $TESTS$
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* charslist ("Hello World !") == " !HWdelor"
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* charslist ("Hello World !") == charsort (charlist ("Hello World !"))
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* charslist (nil) == ""
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* $STATUS$
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* Ready
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* $COMPLIANCE$
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* CHARSLIST() is only available in Harbour's CT3 library.
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* $PLATFORMS$
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* All
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* $FILES$
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* Source is charlist.c, library is libct.
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* $SEEALSO$
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* CHARNOLIST(),CHARLIST(),CHARHIST()
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* $END$
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*/
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HB_FUNC (CHARSLIST)
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{
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do_list (DO_LIST_CHARSLIST);
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return;
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}
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/* $DOC$
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* $FUNCNAME$
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* CHARNOLIST()
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* $CATEGORY$
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* CT3 string functions
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* $ONELINER$
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* Generates a list of all characters not contained in a string
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* $SYNTAX$
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* CHARNOLIST ([<cString>]) -> cCharacterList
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* $ARGUMENTS$
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* [<cString>] is the string for whom the function generates a list
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* of all characters not contained in that string
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* Default: "" (empty string)
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* $RETURNS$
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* <cCharacterList> a list of the characters that are not contained in <cString>
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* $DESCRIPTION$
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* The CHARNOLIST() function generates a list of those characters that
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* are not contained in <cString>. This list can contain each character
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* only once, so that its maximum length is 256. The list is alphabetically
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* sorted.
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* $EXAMPLES$
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* ? charnolist (charnolist ("Hello World !")) --> " !HWdelor"
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* $TESTS$
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* charnolist (charnolist ("Hello World !")) == charslist ("Hello World !")
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* charnolist (charnolist (nil)) == ""
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* $STATUS$
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* Ready
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* $COMPLIANCE$
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* CHARNOLIST() is compatible with CT3's CHARNOLIST().
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* $PLATFORMS$
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* All
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* $FILES$
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* Source is charlist.c, library is libct.
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* $SEEALSO$
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* CHARLIST(),CHARSLIST(),CHARHIST()
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* $END$
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*/
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HB_FUNC (CHARNOLIST)
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{
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do_list (DO_LIST_CHARNOLIST);
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return;
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}
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/* $DOC$
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* $FUNCNAME$
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* CHARHIST()
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* $CATEGORY$
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* CT3 string functions
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* $ONELINER$
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* Generates a character histogram of a string
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* $SYNTAX$
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* CHARHIST ([<cString>]) -> aCharacterCount
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* $ARGUMENTS$
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* [<cString>] is the string for whom the function generates a
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* character histogram
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* Default: "" (empty string)
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* $RETURNS$
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* <aCharacterCount> an array with 256 elements where the nth element
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* contains the count of character #(n-1) in cString
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* $DESCRIPTION$
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* The CHARHIST() function generates a character histogram of those
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* characters that are contained in <cString>. This histogram is stored
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* in an 256-element array where the nth element contains the count
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* of ASCII character #(n-1) in <cString>.
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* $EXAMPLES$
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* ? charhist ("Hello World !")[109] --> 3 // chr(108)=="l"
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* $TESTS$
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* charhist ("Hello World !")[109] == 3
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* eval ({||aeval (charhist ("Hello World !"),{|x|nTotal+=x}),nTotal==len("Hello World !")}
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* $STATUS$
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* Ready
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* $COMPLIANCE$
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* CHARHIST() is only available in Harbour's CT3 library.
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* $PLATFORMS$
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* All
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* $FILES$
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* Source is charlist.c, library is libct.
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* $SEEALSO$
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* CHARLIST(),CHARNOLIST(),CHARSLIST()
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* $END$
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*/
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HB_FUNC (CHARHIST)
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{
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do_list (DO_LIST_CHARHIST);
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return;
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}
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