sourcetext.h

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/* Copyright (C) 2012 Oliver Lemke <olemke@core-dump.info>
 
   This program is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by the
   Free Software Foundation; either version 2, or (at your option) any
   later version.
 
   This program 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 General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
   USA. */
 
#ifndef sourcetext_h
#define sourcetext_h
 
#include "array.h"
#include "mystring.h"
#include "exceptions.h"
 
 
class SourceText {
public:
 
  SourceText() :  mLine(0), mColumn(0), mLineBreak(false)
  { /* Nothing to be done here. */ }
 
  void AppendFile(const String& name);
 
  char Current() {
    if (reachedEot())
      throw Eot( "", this->File(), this->Line(), this->Column() ); 
 
    return mText[mLine][mColumn];
  }
 
  bool reachedEot() {
    return (mLine >= mText.nelem()
            || (mLine == mText.nelem()-1 && mColumn >= mText[mLine].nelem()));
  }
  
  void AdvanceChar();
 
  void AdvanceLine();
 
  const String& File();
 
  Index Line();
 
  Index LineRaw() { return mLine; }
 
  Index ColumnRaw() { return mColumn; }
 
  Index Column() { return mColumn+1; }
 
  void SetPosition(Index line, Index column)
    {
        mLine = line;
        mColumn = column;
    }
    
  void Init();
 
  bool& LineBreak() { return mLineBreak; }
 
  bool  LineBreak() const { return mLineBreak; }
 
  friend std::ostream& operator << (std::ostream& os, const SourceText& text);
 
private:
 
  ArrayOfString mText;
 
  Index mLine;
 
  Index mColumn;
 
  ArrayOfIndex mSfLine;
 
  ArrayOfString mSfName;
 
  bool mLineBreak;
};
 
#endif /* sourcetext_h */