594 lines
14 KiB
C
594 lines
14 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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* TABEXPAND(), TABPACK() CT3 string functions
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*
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* Copyright 2002 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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/* $DOC$
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* $FUNCNAME$
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* TABEXPAND()
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* $CATEGORY$
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* CT3 string functions
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* $ONELINER$
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* Replace tabulator control characters with fill characters
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* $SYNTAX$
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* TABEXPAND (<cString>, [<nTabWidth>], [<cFillChar|nFillChar>],
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* [<cNewLineCharacters>], [<cTabChar|nTabChar>],
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* [<lIgnore141>]) -> cExpandedString
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* $ARGUMENTS$
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* <cString>
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* <nTabWidth>
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* <cFillChar|nFillChar>
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* <cNewLineCharacters> string indicating new line,
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* default is the string returned by
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* hb_osnewline()
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* <cTabChar|nTabChar> character indicating a tab stop,
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* default is chr(9)
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* <lIgnore141> .T., if the soft-CR used by MEMOEDIT()
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* should be ignored as a newline indicator,
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* default is .F. (functions uses chr(141))
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* $RETURNS$
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* $DESCRIPTION$
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* TODO: add documentation
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* $EXAMPLES$
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* $TESTS$
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* tabexpand("-"+chr(9)+"!") == "- !"
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* tabexpand("----"+chr(9) +"!") == "---- !"
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* tabexpand("-"+chr(9)+"!",, "+") == "-+++++++!"
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* tabexpand("-"+chr(9)+ "!", 4) == "- !"
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* tabexpand("----"+chr(9)+ "!", 8) == "---- !"
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* tabexpand("----"+chr(9)+ "!", 8, "+") == "----++++!"
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* tabexpand("-"+chr(9)+"!"+hb_osnewline()+"----"+chr(9)+ "!",, "+") == "-+++++++!"+hb_osnewline()+"----++++!"
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* $STATUS$
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* Started
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* $COMPLIANCE$
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* TABEXPAND() is compatible with CT3's TABEXPAND(), but there are
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* three new parameters for a better fine control of the function's
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* behaviour.
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* $PLATFORMS$
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* All
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* $FILES$
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* Source is tab.c, library is libct.
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* $SEEALSO$
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* TABPACK()
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* $END$
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*/
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HB_FUNC (TABEXPAND)
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{
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if (ISCHAR (1))
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{
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char *pcString = (char *)hb_parc (1);
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size_t sStrLen = (size_t)hb_parclen (1);
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char *pcRet;
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size_t sRetLen;
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size_t sTabWidth = 0;
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char cFill, cTab, cCR;
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char *pcNewLine;
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size_t sNewLineLen;
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int iIgnore141;
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size_t sIndex, sLineIndex;
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size_t sTabCnt = 0;
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if (ISNUM (2))
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{
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sTabWidth = hb_parnl (2);
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}
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if ((signed)sTabWidth <= 0)
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{
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sTabWidth = 8;
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}
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if (ISNUM (3) ||
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((ISCHAR (3)) && (hb_parclen(3)>0)))
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{
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if (ISNUM (3))
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{
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cFill = (char)((hb_parnl (3))%256);
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}
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else
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{
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cFill = (char)(*(hb_parc (3)));
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}
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}
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else
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{
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cFill = 0x20;
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}
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if ((ISCHAR (4)) && (hb_parclen(4)>0))
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{
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pcNewLine = (char *)hb_parc (4);
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sNewLineLen = hb_parclen (4);
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}
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else
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{
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pcNewLine = hb_conNewLine();
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sNewLineLen = 0;
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while (*(pcNewLine+sNewLineLen) != 0x00)
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sNewLineLen++;
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}
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if (sNewLineLen > 0)
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{
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cCR = *(pcNewLine);
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}
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else
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{
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cCR = 13;
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}
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if (ISNUM (5) ||
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((ISCHAR (5)) && (hb_parclen(5)>0)))
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{
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if (ISNUM (5))
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{
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cTab = (char)((hb_parnl (5))%256);
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}
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else
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{
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cTab = (char)(*(hb_parc (5)));
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}
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}
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else
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{
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cTab = 0x09;
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}
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if (ISLOG (6))
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{
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iIgnore141 = hb_parl (6);
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}
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else
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{
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iIgnore141 = 0;
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}
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/* estimate maximum return length by assuming that EVERY tab char
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can be replaced by at most <nTabWidth> characters */
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for (sIndex = 0; sIndex < sStrLen; sIndex++)
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{
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if (*(pcString+sIndex) == cTab)
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{
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sTabCnt++;
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}
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}
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pcRet = (char *)hb_xgrab (sStrLen+(sTabCnt*(sTabWidth-1)));
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/* now copy the string */
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sIndex = 0;
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sRetLen = 0;
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sLineIndex = 0;
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while (sTabCnt > 0)
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{
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char cChar = (char)*(pcString+sIndex);
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if (cChar == cTab)
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{
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/* tab character */
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size_t sFillIndex;
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for (sFillIndex = sTabWidth-(sLineIndex%sTabWidth);
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sFillIndex > 0; sFillIndex--)
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{
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*(pcRet+sRetLen) = cFill;
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sRetLen++;
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sLineIndex++;
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}
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sTabCnt--;
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sIndex++;
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}
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else if ((unsigned char)cChar == 141)
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{
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/* soft carriage return */
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*(pcRet+sRetLen) = 141;
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sRetLen++;
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sIndex++;
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if (iIgnore141)
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{
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sLineIndex++;
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}
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else
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{
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sLineIndex = 0;
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}
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}
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else if (cChar == cCR)
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{
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/* newline string ? */
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if ((sNewLineLen > 0) &&
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((sIndex+sNewLineLen) <= sStrLen) &&
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(ct_at_exact_forward (pcString+sIndex, sNewLineLen,
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pcNewLine, sNewLineLen, NULL) == pcString+sIndex))
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{
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hb_xmemcpy (pcRet+sRetLen, pcString+sIndex, sNewLineLen);
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sRetLen += sNewLineLen;
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sIndex += sNewLineLen;
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sLineIndex = 0;
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}
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else
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{
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*(pcRet+sRetLen) = cCR;
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sRetLen++;
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sIndex++;
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sLineIndex++;
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}
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}
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else
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{
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*(pcRet+sRetLen) = *(pcString+sIndex);
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sRetLen++;
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sIndex++;
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sLineIndex++;
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}
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}
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/* copy rest */
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hb_xmemcpy (pcRet+sRetLen, pcString+sIndex, sStrLen-sIndex);
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sRetLen += sStrLen-sIndex;
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hb_retclen (pcRet, sRetLen);
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hb_xfree (pcRet);
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}
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else /* ISCHAR (1) */
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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, CT_ERROR_TABEXPAND,
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NULL, "TABEXPAND", 0, EF_CANSUBSTITUTE, 6,
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hb_paramError (1), hb_paramError (2), hb_paramError (3),
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hb_paramError (4), hb_paramError (5), hb_paramError (6));
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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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return;
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}
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/* $DOC$
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* $FUNCNAME$
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* TABPACK()
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* $CATEGORY$
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* CT3 string functions
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* $ONELINER$
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* Pack fill characters to appropriate tab characters
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* $SYNTAX$
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* TABPACK (<cString>, [<nTabWidth>], [<cFillChar|nFillChar>],
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* [<cNewLineCharacters>], [<cTabChar|nTabChar>],
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* [<lIgnore141>]) -> cPackedString
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* $ARGUMENTS$
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* <cString>
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* <nTabWidth>
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* <cFillChar|nFillChar>
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* <cNewLineCharacters> string indicating new line,
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* default is the string returned by
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* hb_osnewline()
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* <cTabChar|nTabChar> character indicating a tab stop,
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* default is chr(9)
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* <lIgnore141> .T., if the soft-CR used by MEMOEDIT()
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* should be ignored as a newline indicator,
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* default is .F. (functions uses chr(141))
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* $RETURNS$
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* $DESCRIPTION$
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* TODO: add documentation
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* $EXAMPLES$
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* $TESTS$
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* $STATUS$
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* Started
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* $COMPLIANCE$
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* TABPACK() is compatible with CT3's TABPACK(), but there are
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* three new parameters for a better fine control of the function's
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* behaviour.
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* $PLATFORMS$
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* All
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* $FILES$
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* Source is tab.c, library is libct.
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* $SEEALSO$
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* TABEXPAND()
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* $END$
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*/
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HB_FUNC (TABPACK)
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{
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if (ISCHAR (1))
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{
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char *pcString = (char *)hb_parc (1);
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size_t sStrLen = (size_t)hb_parclen (1);
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char *pcRet;
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size_t sRetLen;
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size_t sTabWidth = 0;
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char cFill, cTab, cCR;
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char *pcNewLine;
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size_t sNewLineLen;
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int iIgnore141;
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size_t sIndex, sTabIndex, sFillCount;
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if (ISNUM (2))
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{
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sTabWidth = hb_parnl (2);
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}
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if ((signed)sTabWidth <= 0)
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{
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sTabWidth = 8;
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}
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if (ISNUM (3) ||
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((ISCHAR (3)) && (hb_parclen(3)>0)))
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{
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if (ISNUM (3))
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{
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cFill = (char)((hb_parnl (3))%256);
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}
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else
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{
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cFill = (char)(*(hb_parc (3)));
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}
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}
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else
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{
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cFill = 0x20;
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}
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if ((ISCHAR (4)) && (hb_parclen(4)>0))
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{
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pcNewLine = (char *)hb_parc (4);
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sNewLineLen = hb_parclen (4);
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}
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else
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{
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pcNewLine = hb_conNewLine();
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sNewLineLen = 0;
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while (*(pcNewLine+sNewLineLen) != 0x00)
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sNewLineLen++;
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}
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if (sNewLineLen > 0)
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{
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cCR = *(pcNewLine);
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}
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else
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{
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cCR = 13;
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}
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if (ISNUM (5) ||
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((ISCHAR (5)) && (hb_parclen(5)>0)))
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{
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if (ISNUM (5))
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{
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cTab = (char)((hb_parnl (5))%256);
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}
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else
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{
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cTab = (char)(*(hb_parc (5)));
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}
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}
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else
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{
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cTab = 0x09;
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}
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if (ISLOG (6))
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{
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iIgnore141 = hb_parl (6);
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}
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else
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{
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iIgnore141 = 0;
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}
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/* estimate maximum return length by assuming that there's
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nothing to pack */
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pcRet = (char *)hb_xgrab (sStrLen);
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/* now copy the string */
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sIndex = 0;
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sRetLen = 0;
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sTabIndex = 0;
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sFillCount = 0;
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while (sIndex < sStrLen)
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{
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char cChar = (char)*(pcString+sIndex);
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if (cChar == cFill)
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{
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if (sTabIndex==sTabWidth-1)
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{
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/* we have just found the last character of a tabstopp */
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*(pcRet+sRetLen) = cTab;
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sRetLen++;
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sFillCount = 0;
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sTabIndex = 0;
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sIndex++;
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}
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else
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{
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sFillCount++;
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sTabIndex++;
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sIndex++;
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}
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}
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else if (cChar == cTab)
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{
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*(pcRet+sRetLen) = cTab;
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sRetLen++;
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/* discard any fill characters before the tabstopp */
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sFillCount = 0;
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sTabIndex = 0;
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sIndex++;
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}
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else if (((unsigned char)cChar == 141) && (!iIgnore141))
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{
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/* soft carriage return */
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/* eventually not enough fill chars to fill a tab,
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so copy them verbatim */
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for (;sFillCount>0;sFillCount--)
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{
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*(pcRet+sRetLen) = cFill;
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sRetLen++;
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}
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*(pcRet+sRetLen) = 141;
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sRetLen++;
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sTabIndex = 0;
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sIndex++;
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}
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else if (cChar == cCR)
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{
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/* newline string ? */
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if ((sNewLineLen > 0) &&
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((sIndex+sNewLineLen) <= sStrLen) &&
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(ct_at_exact_forward (pcString+sIndex, sNewLineLen,
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pcNewLine, sNewLineLen, NULL) == pcString+sIndex))
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{
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/* eventually not enough fill chars to fill a tab,
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so copy them verbatim */
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for (;sFillCount>0;sFillCount--)
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{
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*(pcRet+sRetLen) = cFill;
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sRetLen++;
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}
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hb_xmemcpy (pcRet+sRetLen, pcString+sIndex, sNewLineLen);
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sRetLen += sNewLineLen;
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sIndex += sNewLineLen;
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sTabIndex = 0;
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}
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else
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{
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*(pcRet+sRetLen) = cCR;
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sRetLen++;
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sIndex++;
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sTabIndex = 0;
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}
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}
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else
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{
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/* eventually not enough fill chars to fill a tab,
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so copy them verbatim */
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for (;sFillCount>0;sFillCount--)
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{
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*(pcRet+sRetLen) = cFill;
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sRetLen++;
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sTabIndex++;
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if (sTabIndex==sTabWidth-1)
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{
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sTabIndex = 0;
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}
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}
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*(pcRet+sRetLen) = *(pcString+sIndex);
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sRetLen++;
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sIndex++;
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sTabIndex++;
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if (sTabIndex==sTabWidth-1)
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{
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sTabIndex = 0;
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}
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}
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}
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/* copy rest */
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for (;sFillCount>0;sFillCount--)
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{
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*(pcRet+sRetLen) = cFill;
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sRetLen++;
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}
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hb_retclen (pcRet, sRetLen);
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hb_xfree (pcRet);
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}
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else /* ISCHAR (1) */
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|
{
|
|
PHB_ITEM pSubst = NULL;
|
|
int iArgErrorMode = ct_getargerrormode();
|
|
if (iArgErrorMode != CT_ARGERR_IGNORE)
|
|
{
|
|
pSubst = ct_error_subst ((USHORT)iArgErrorMode, EG_ARG, CT_ERROR_TABPACK,
|
|
NULL, "TABPACK", 0, EF_CANSUBSTITUTE, 6,
|
|
hb_paramError (1), hb_paramError (2), hb_paramError (3),
|
|
hb_paramError (4), hb_paramError (5), hb_paramError (6));
|
|
}
|
|
|
|
if (pSubst != NULL)
|
|
{
|
|
hb_itemReturn (pSubst);
|
|
hb_itemRelease (pSubst);
|
|
}
|
|
else
|
|
{
|
|
hb_retc ("");
|
|
}
|
|
}
|
|
|
|
return;
|
|
|
|
}
|