LexerSharedInputState.cs :  » Inversion-of-Control-Dependency-Injection » Spring.net » Spring » Expressions » Parser » antlr » C# / CSharp Open Source

using System;
using StreamSystem.IO.Stream;
using TextReaderSystem.IO.TextReader;

namespace Spring.Expressions.Parser.antlr{
  /*ANTLR Translator Generator
  * Project led by Terence Parr at http://www.jGuru.com
  * Software rights: http://www.antlr.org/license.html
  *
  * $Id:$
  */
  
  //
  // ANTLR C# Code Generator by Micheal Jordan
  //                            Kunle Odutola       : kunle UNDERSCORE odutola AT hotmail DOT com
  //                            Anthony Oguntimehin
  //
  // With many thanks to Eric V. Smith from the ANTLR list.
  //

  /*This object contains the data associated with an
  *  input stream of characters.  Multiple lexers
  *  share a single LexerSharedInputState to lex
  *  the same input stream.
  */
  public class LexerSharedInputState
  {
    protected internal int column;
    protected internal int line;
    protected internal int tokenStartColumn;
    protected internal int tokenStartLine;
    protected internal InputBuffer input;
    
    /*What file (if known) caused the problem? */
    protected internal string filename;
    
    public int guessing;
    
    public LexerSharedInputState(InputBuffer inbuf)
    {
      initialize();
      input = inbuf;
    }
    
    public LexerSharedInputState(Stream inStream) : this(new ByteBuffer(inStream))
    {
    }
    
    public LexerSharedInputState(TextReader inReader) : this(new CharBuffer(inReader))
    {
    }
    
    private void initialize()
    {
      column = 1;
      line = 1;
      tokenStartColumn = 1;
      tokenStartLine = 1;
      guessing = 0;
      filename = null;
    }
    
    public virtual void reset()
    {
      initialize();
      input.reset();
    }

    public virtual void resetInput(InputBuffer ib)
    {
      reset();
      input = ib;
    }

    public virtual void resetInput(Stream s)
    {
      reset();
      input = new ByteBuffer(s);
    }

    public virtual void resetInput(TextReader tr)
    {
      reset();
      input = new CharBuffer(tr);
    }
  }
}