package jacorb.util;

/*
 *        JacORB - a free Java ORB
 *
 *   Copyright (C) 1997-2000  Gerald Brose.
 *
 *   This library is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU Library General Public
 *   License as published by the Free Software Foundation; either
 *   version 2 of the License, or (at your option) any later version.
 *
 *   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
 *   Library General Public License for more details.
 *
 *   You should have received a copy of the GNU Library General Public
 *   License along with this library; if not, write to the Free
 *   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

import java.util.*;
import java.io.*;

/**
 * 
 * @author Gerald Brose
 * @version $Id: Debug.java,v 1.18 2001/02/08 10:04:22 jacorb Exp $
 */

public final class Debug
{
    /* private variables */
    //for byte -> hexchar
    private static final char[] lookup = 
        new char[]{ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; 

    private static StringBuffer sb = new StringBuffer();

    private static int _verbosity;
    private static int _category;
    private static PrintWriter _log_file_out = Environment.logFileOut();

    /* Debug priorities */

    public static final int QUIET = 0;
    public static final int IMPORTANT = 1;
    public static final int INFORMATION = 2;
    public static final int DEBUG1 = 3;

    /* debug categories, disjoint */

    public static final int ORB_CONNECT = 0x0100;
    public static final int ORB_MISC = 0x0200;
    public static final int POA = 0x0400;
    public static final int IMR = 0x0800;
    public static final int DSI = 0x1000;
    public static final int DII = 0x2000;
    public static final int INTERCEPTOR = 0x4000;

    public static final int DOMAIN = 0x8000;
    public static final int PROXY = 0x010000;
    public static final int COMPILER = 0x020000;
    public static final int TOOLS = 0x040000;

    /* unused */
    /* 

       !! Please update names in CAD.java as well,
       if you make updates here !!

       public static final int UNUSED = 0x080000;
       ...
       public static final int ORB_CONNECT = 0x400000;
    */

    public static final int NAMING = 0x01000000;
    public static final int TRADING = 0x02000000;
    public static final int EVENTS = 0x04000000;
    public static final int TRANSACTION = 0x08000000;
    public static final int SECURITY = 0x10000000;

    /* unused */
    /*
      !! Please update names in CAD.java as well,
      if you make updates here !!

      public static final int ORB_CONNECT = 0x20000000;
      public static final int ORB_CONNECT = 0x30000000;
      public static final int RESERVED = 0x40000000;
    */

    static 
    {
        initialize();
    }

    public static final void initialize()
    {
        _verbosity = Environment.verbosityLevel() & 0xff;
        _category = Environment.verbosityLevel() & 0xffffff00;
        if( _category == 0 )
            _category = 0xffffff00;
        _log_file_out = Environment.logFileOut();
    }

    public static boolean canOutput( int msg_level )
    {
        int category = msg_level & 0xffffff00;
        int _msg_level = msg_level & 0xff;

        if( category == 0 )
        {
            category = 0xffffff00;
        }

        return ( (category & _category) != 0 ) &&
            (_msg_level <= _verbosity);
    }

    public static final void output(int msg_level, String msg) 
    {	
        if( canOutput( msg_level ))
        {
            if (_log_file_out == null ) 
            {
                System.out.println("[ " + msg + " ]");
            } 
            else
            {
                _log_file_out.println("[ " + Environment.time() + "> " + msg + " ]");
                _log_file_out.flush();
            }
        }
    }

    /**
     * Output a buffer in hex format. Note that output synchronizes
     * the calling threads in order to avoid garbled debug output.
     */

    public static synchronized void output(int msg_level,String name,byte bs[])
    {
	output(msg_level,name,bs, 0, bs.length);
    }
	
    /**
     * Output a buffer in hex format. Note that output synchronizes
     * the calling threads in order to avoid garbled debug output.
     */

    public static synchronized void output(int msg_level,
					   String name,
					   byte bs[],
					   int len)
    {
	output( msg_level,name,bs,0,len );
    }

    public static synchronized void output(int msg_level,
					   String name,
					   byte bs[],
					   int start, 
					   int len)
    {
        if( canOutput( msg_level ) )
        {
	    System.out.print("\nHexdump ["+name+"] len="+len+","+bs.length);
	    StringBuffer chars = new StringBuffer();

	    for( int i = start; i < len; i++ )
	    {
		if((i %16 ) == 0)
		{
		    System.out.println( chars ); 
                    chars = new StringBuffer();                    
		}

		chars.append( toAscii( bs[i] ));

		System.out.print( toHex( bs[i] ));

		if( (i % 4) == 3 ) 
		{ 
		    chars.append( ' ' );
                    System.out.print( ' ' ); 
		}
	    }

	    System.out.println( chars );
	}
    }


    public static final String toHex( byte b )
    {
        StringBuffer sb = new StringBuffer();

        int upper = (b >> 4) & 0x0F;
        sb.append( lookup[upper] );

        int lower = b & 0x0F;
        sb.append( lookup[lower] );
        
        sb.append( ' ' );

        return sb.toString();
    }
	
    public static final char toAscii(byte b)
    {
	if( b > (byte) 31 && 
            b < (byte) 127) 
        {
            return (char) b; 
        }
        else 
        {
            return '.';
        }
    }
	
    public static final void output(int msg_level, Throwable e) 
    {
        if( canOutput( msg_level ) )
        {
            if (_log_file_out == null || msg_level == 0) 
            {
                System.out.println("############################ StackTrace ############################");
                e.printStackTrace(System.out);
                System.out.println("####################################################################");
            } 
            if (_log_file_out != null)
            {
                _log_file_out.println("############################ StackTrace ############################");
                e.printStackTrace(_log_file_out);
                _log_file_out.println("####################################################################");
                _log_file_out.flush();			
            }
        }
    }


    public static void printTrace(int msg_level)
    {
        if( canOutput( msg_level ) )
        {
            try
            {
                throw new RuntimeException();
            }
            catch( Exception e )
            {
                e.printStackTrace();
            }
        }
    }

    /** throws an assertion violation exception if the boolean expression
     *  is not satisfied.
     *  @param expression the expression to be checked
     *  @param msg_level the message level of the assertion
     *  @param msg the message to be printed
     *  @exception AssertionViolation 
     */

    public static void assert(int msg_level, boolean expression, String msg)
    {
        if( canOutput( msg_level ))
        {
            if (! expression) 
                throw new AssertionViolation(msg);
        }
    }

    public static void assert(boolean expression, String msg)
    {
        assert( 1, expression, msg );
    }

    
}




