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/*************************************************************************
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: tkpchars.hxx,v $
*
* $Revision: 1.3 $
*
* last change: $Author: rt $ $Date: 2005-09-07 18:10:42 $
*
* The Contents of this file are made available subject to
* the terms of GNU Lesser General Public License Version 2.1.
*
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2005 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
*
************************************************************************/
#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
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