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 */