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390 lines
11 KiB
C
390 lines
11 KiB
C
/*
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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://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.txt. 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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HB_FUNC( TABEXPAND )
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{
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if( HB_ISCHAR( 1 ) )
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{
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const char * pcString = hb_parc( 1 );
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HB_SIZE sStrLen = hb_parclen( 1 );
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char * pcRet;
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HB_SIZE sRetLen;
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HB_SIZE sTabWidth = 0;
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char cFill, cTab, cCR;
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const char * pcNewLine;
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HB_SIZE sNewLineLen;
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int iIgnore141;
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HB_SIZE sIndex, sLineIndex;
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HB_SIZE sTabCnt = 0;
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if( HB_ISNUM( 2 ) )
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sTabWidth = hb_parns( 2 );
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if( ( HB_ISIZ ) sTabWidth <= 0 )
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sTabWidth = 8;
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if( HB_ISNUM( 3 ) )
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cFill = ( char ) ( hb_parnl( 3 ) % 256 );
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else if( hb_parclen( 3 ) > 0 )
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cFill = hb_parc( 3 )[ 0 ];
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else
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cFill = 0x20;
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if( HB_ISCHAR( 4 ) && hb_parclen( 4 ) > 0 )
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{
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pcNewLine = 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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cCR = *( pcNewLine );
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else
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cCR = 13;
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if( HB_ISNUM( 5 ) )
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cTab = ( char ) ( hb_parnl( 5 ) % 256 );
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else if( hb_parclen( 5 ) > 0 )
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cTab = hb_parc( 5 )[ 0 ];
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else
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cTab = 0x09;
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iIgnore141 = hb_parldef( 6, 0 );
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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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sTabCnt++;
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}
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if( sTabCnt == 0 )
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{
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hb_retclen( pcString, sStrLen );
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return;
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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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HB_SIZE sFillIndex;
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for( sFillIndex = sTabWidth - ( sLineIndex % sTabWidth ); 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( cChar == HB_CHAR_SOFT1 )
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{
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/* soft carriage return */
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*( pcRet + sRetLen ) = HB_CHAR_SOFT1;
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sRetLen++;
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sIndex++;
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if( iIgnore141 )
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sLineIndex++;
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else
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sLineIndex = 0;
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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, pcNewLine,
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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
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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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pSubst = ct_error_subst( ( HB_USHORT ) iArgErrorMode, EG_ARG,
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CT_ERROR_TABEXPAND, NULL, HB_ERR_FUNCNAME, 0,
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EF_CANSUBSTITUTE, HB_ERR_ARGS_BASEPARAMS );
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if( pSubst != NULL )
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hb_itemReturnRelease( pSubst );
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else
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hb_retc_null();
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}
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}
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HB_FUNC( TABPACK )
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{
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if( HB_ISCHAR( 1 ) )
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{
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const char * pcString = hb_parc( 1 );
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HB_SIZE sStrLen = hb_parclen( 1 );
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char * pcRet;
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HB_SIZE sRetLen;
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HB_SIZE sTabWidth = 0;
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char cFill, cTab, cCR;
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const char * pcNewLine;
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HB_SIZE sNewLineLen;
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int iIgnore141;
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HB_SIZE sIndex, sTabIndex, sFillCount;
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if( HB_ISNUM( 2 ) )
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sTabWidth = hb_parns( 2 );
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if( ( HB_ISIZ ) sTabWidth <= 0 )
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sTabWidth = 8;
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if( HB_ISNUM( 3 ) )
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cFill = ( char ) ( hb_parnl( 3 ) % 256 );
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else if( hb_parclen( 3 ) > 0 )
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cFill = hb_parc( 3 )[ 0 ];
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else
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cFill = 0x20;
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sNewLineLen = hb_parclen( 4 );
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if( sNewLineLen > 0 )
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pcNewLine = hb_parc( 4 );
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else
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{
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pcNewLine = hb_conNewLine();
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sNewLineLen = strlen( pcNewLine );
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}
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if( sNewLineLen > 0 )
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cCR = *( pcNewLine );
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else
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cCR = 13;
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if( HB_ISNUM( 5 ) )
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cTab = ( char ) ( hb_parnl( 5 ) % 256 );
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else if( hb_parclen( 5 ) > 0 )
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cTab = hb_parc( 5 )[ 0 ];
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else
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cTab = 0x09;
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iIgnore141 = hb_parldef( 6, 0 );
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if( sStrLen == 0 )
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{
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hb_retc_null();
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return;
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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( cChar == HB_CHAR_SOFT1 && ! 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 ) = HB_CHAR_SOFT1;
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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, pcNewLine,
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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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sTabIndex = 0;
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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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sTabIndex = 0;
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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
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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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pSubst = ct_error_subst( ( HB_USHORT ) iArgErrorMode, EG_ARG,
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CT_ERROR_TABPACK, NULL, HB_ERR_FUNCNAME, 0,
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EF_CANSUBSTITUTE, HB_ERR_ARGS_BASEPARAMS );
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if( pSubst != NULL )
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hb_itemReturnRelease( pSubst );
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else
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hb_retc_null();
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}
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}
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