211 lines
6.7 KiB
C++
211 lines
6.7 KiB
C++
/*************************************************************************
|
|
*
|
|
* $RCSfile: tkpchars.hxx,v $
|
|
*
|
|
* $Revision: 1.2 $
|
|
*
|
|
* last change: $Author: np $ $Date: 2002-05-14 09:02:18 $
|
|
*
|
|
* The Contents of this file are made available subject to the terms of
|
|
* either of the following licenses
|
|
*
|
|
* - GNU Lesser General Public License Version 2.1
|
|
* - Sun Industry Standards Source License Version 1.1
|
|
*
|
|
* Sun Microsystems Inc., October, 2000
|
|
*
|
|
* GNU Lesser General Public License Version 2.1
|
|
* =============================================
|
|
* Copyright 2000 by Sun Microsystems, Inc.
|
|
* 901 San Antonio Road, Palo Alto, CA 94303, USA
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License version 2.1, as published by the Free Software Foundation.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*
|
|
*
|
|
* Sun Industry Standards Source License Version 1.1
|
|
* =================================================
|
|
* The contents of this file are subject to the Sun Industry Standards
|
|
* Source License Version 1.1 (the "License"); You may not use this file
|
|
* except in compliance with the License. You may obtain a copy of the
|
|
* License at http://www.openoffice.org/license.html.
|
|
*
|
|
* Software provided under this License is provided on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
|
|
* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
|
|
* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
|
|
* See the License for the specific provisions governing your rights and
|
|
* obligations concerning the Software.
|
|
*
|
|
* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
|
|
*
|
|
* Copyright: 2000 by Sun Microsystems, Inc.
|
|
*
|
|
* All Rights Reserved.
|
|
*
|
|
* Contributor(s): _______________________________________
|
|
*
|
|
*
|
|
************************************************************************/
|
|
|
|
#ifndef ADC_TKPCHARS_HXX
|
|
#define ADC_TKPCHARS_HXX
|
|
|
|
// USED SERVICES
|
|
// BASE CLASSES
|
|
// COMPONENTS
|
|
// PARAMETRS
|
|
#include <adc_cl.hxx>
|
|
#include <stack>
|
|
|
|
|
|
|
|
/** @descr
|
|
|
|
dpSource:
|
|
|
|
1||||||||||||||||||||||a||||||||||||b|||c||||||||||||||||||||...
|
|
|
|
|
|
1 := first character of Sourcecode.
|
|
a := nLastTokenStart, there starts the last cut token.
|
|
b := nLastCut, there is a '\0'-char which marks the end of
|
|
the last cut token. The original character at b is stored
|
|
in cCharAtLastCut and will replace the '\0'-char, when the
|
|
next token is cut.
|
|
c := The current cursor position.
|
|
|
|
|
|
@needs cosv.lib
|
|
|
|
@use This class can be used by any parser to get the chars of a
|
|
text one by one and separate them to tokens.
|
|
**/
|
|
|
|
class CharacterSource
|
|
{
|
|
public:
|
|
// LIFECYCLE
|
|
CharacterSource();
|
|
~CharacterSource();
|
|
|
|
// OPERATIONS
|
|
/** Loads the complete contents of in_rSource into the classes private memory.
|
|
If in_rSource is a file, it has to be open of course.
|
|
After loading the text, the CurChar() is set on the begin of the text.
|
|
**/
|
|
void LoadText(
|
|
csv::bstream & io_rSource);
|
|
/** Loads the complete contents of in_rSource into the classes private memory.
|
|
If in_rSource is a file, it has to be open of course.
|
|
After loading the text, the CurChar() is set on the begin of the text.
|
|
**/
|
|
void LoadText(
|
|
const char * i_sSourceText );
|
|
|
|
void InsertTextAtCurPos(
|
|
const char * i_sText2Insert );
|
|
|
|
/// @return CurChar() after moving forward one char.
|
|
char MoveOn();
|
|
/** @return
|
|
The token which starts at the char which was CurChar(), when
|
|
CutToken() was called the last time - or at the beginning of the text.
|
|
The token ends by the CurChar() being replaced by a '\0'.
|
|
|
|
Value is valid until the next call of CutToken() or ~CharacterSource().
|
|
**/
|
|
const char * CutToken();
|
|
|
|
// INQUIRY
|
|
char CurChar() const;
|
|
/// @return The result of the last CutToken(). Or NULL, if there was none yet.
|
|
const char * CurToken() const;
|
|
|
|
// INQUIRY
|
|
/// @return true, if
|
|
bool IsFinished() const;
|
|
|
|
private:
|
|
struct S_SourceState
|
|
{
|
|
DYN char * dpSource;
|
|
intt nSourceSize;
|
|
|
|
intt nCurPos;
|
|
intt nLastCut;
|
|
intt nLastTokenStart;
|
|
char cCharAtLastCut;
|
|
|
|
S_SourceState(
|
|
DYN char * dpSource,
|
|
intt nSourceSize,
|
|
intt nCurPos,
|
|
intt nLastCut,
|
|
intt nLastTokenStart,
|
|
char cCharAtLastCut );
|
|
};
|
|
|
|
void BeginSource();
|
|
intt CurPos() const;
|
|
char MoveOn_OverStack();
|
|
|
|
// DATA
|
|
std::stack< S_SourceState >
|
|
aSourcesStack;
|
|
|
|
DYN char * dpSource;
|
|
intt nSourceSize;
|
|
|
|
intt nCurPos;
|
|
intt nLastCut;
|
|
intt nLastTokenStart;
|
|
char cCharAtLastCut;
|
|
};
|
|
|
|
|
|
inline char
|
|
CharacterSource::MoveOn()
|
|
{
|
|
if (DEBUG_ShowText())
|
|
{
|
|
Cerr() << char(dpSource[nCurPos+1]) << Flush();
|
|
}
|
|
if ( nCurPos < nSourceSize-1 )
|
|
return dpSource[++nCurPos];
|
|
else if ( aSourcesStack.size() > 0 )
|
|
return MoveOn_OverStack();
|
|
else
|
|
return dpSource[nCurPos = nSourceSize];
|
|
}
|
|
inline char
|
|
CharacterSource::CurChar() const
|
|
{ return nCurPos != nLastCut ? dpSource[nCurPos] : cCharAtLastCut; }
|
|
inline const char *
|
|
CharacterSource::CurToken() const
|
|
{ return &dpSource[nLastTokenStart]; }
|
|
inline bool
|
|
CharacterSource::IsFinished() const
|
|
{ return nCurPos >= nSourceSize; }
|
|
inline intt
|
|
CharacterSource::CurPos() const
|
|
{ return nCurPos; }
|
|
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|