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debug.h

/* 
   Unix SMB/Netbios implementation.
   Version 1.9.
   SMB debug stuff
   Copyright (C) Andrew Tridgell 1992-1998
   Copyright (C) John H Terpstra 1996-1998
   Copyright (C) Luke Kenneth Casson Leighton 1996-1998
   Copyright (C) Paul Ashton 1998
   
   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 of the License, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#ifndef _DEBUG_H
#define _DEBUG_H

/* -------------------------------------------------------------------------- **
 * Debugging code.  See also debug.c
 */

/* mkproto.awk has trouble with ifdef'd function definitions (it ignores
 * the #ifdef directive and will read both definitions, thus creating two
 * diffferent prototype declarations), so we must do these by hand.
 */
/* I know the __attribute__ stuff is ugly, but it does ensure we get the 
   arguemnts to DEBUG() right. We have got them wrong too often in the 
   past.
 */
int  Debug1( const char *, ... ) PRINTF_ATTRIBUTE(1,2);
BOOL dbgtext( const char *, ... ) PRINTF_ATTRIBUTE(1,2);

/* If we have these macros, we can add additional info to the header. */
#ifdef HAVE_FILE_MACRO
#define FILE_MACRO (__FILE__)
#else
#define FILE_MACRO ("")
#endif

#ifdef HAVE_FUNCTION_MACRO
#define FUNCTION_MACRO  (__FUNCTION__)
#else
#define FUNCTION_MACRO  ("")
#endif

/* 
 * Redefine DEBUGLEVEL because so we don't have to change every source file
 * that *unnecessarily* references it. Source files neeed not extern reference 
 * DEBUGLEVEL, as it's extern in includes.h (which all source files include).
 * Eventually, all these references should be removed, and all references to
 * DEBUGLEVEL should be references to DEBUGLEVEL_CLASS[DBGC_ALL]. This could
 * still be through a macro still called DEBUGLEVEL. This cannot be done now
 * because some references would expand incorrectly.
 */
#define DEBUGLEVEL *debug_level


/*
 * Define all new debug classes here. A class is represented by an entry in
 * the DEBUGLEVEL_CLASS array. Index zero of this arrray is equivalent to the
 * old DEBUGLEVEL. Any source file that does NOT add the following lines:
 *
 *   #undef  DBGC_CLASS
 *   #define DBGC_CLASS DBGC_<your class name here>
 *
 * at the start of the file (after #include "includes.h") will default to
 * using index zero, so it will behaive just like it always has. 
 */
#define DBGC_CLASS            0     /* override as shown above */
#define DBGC_ALL              0     /* index equivalent to DEBUGLEVEL */

#define DBGC_TDB              1
#define DBGC_PRINTDRIVERS     2
#define DBGC_LANMAN           3

#define DBGC_LAST             4     /* MUST be last class value + 1 */


extern int DEBUGLEVEL_CLASS[DBGC_LAST];


/* Debugging macros
 *
 * DEBUGLVL()
 *   If the 'file specific' debug class level >= level OR the system-wide 
 *   DEBUGLEVEL (synomym for DEBUGLEVEL_CLASS[ DBGC_ALL ]) >= level then
 *   generate a header using the default macros for file, line, and 
 *   function name. Returns True if the debug level was <= DEBUGLEVEL.
 * 
 *   Example: if( DEBUGLVL( 2 ) ) dbgtext( "Some text.\n" );
 *
 * DEBUGLVLC()
 *   If the 'macro specified' debug class level >= level OR the system-wide 
 *   DEBUGLEVEL (synomym for DEBUGLEVEL_CLASS[ DBGC_ALL ]) >= level then 
 *   generate a header using the default macros for file, line, and 
 *   function name. Returns True if the debug level was <= DEBUGLEVEL.
 * 
 *   Example: if( DEBUGLVL( DBGC_TDB, 2 ) ) dbgtext( "Some text.\n" );
 *
 * DEBUG()
 *   If the 'file specific' debug class level >= level OR the system-wide 
 *   DEBUGLEVEL (synomym for DEBUGLEVEL_CLASS[ DBGC_ALL ]) >= level then 
 *   generate a header using the default macros for file, line, and 
 *   function name. Each call to DEBUG() generates a new header *unless* the 
 *   previous debug output was unterminated (i.e. no '\n').
 *   See debug.c:dbghdr() for more info.
 *
 *   Example: DEBUG( 2, ("Some text and a valu %d.\n", value) );
 *
 * DEBUGC()
 *   If the 'macro specified' debug class level >= level OR the system-wide 
 *   DEBUGLEVEL (synomym for DEBUGLEVEL_CLASS[ DBGC_ALL ]) >= level then 
 *   generate a header using the default macros for file, line, and 
 *   function name. Each call to DEBUG() generates a new header *unless* the 
 *   previous debug output was unterminated (i.e. no '\n').
 *   See debug.c:dbghdr() for more info.
 *
 *   Example: DEBUG( DBGC_TDB, 2, ("Some text and a valu %d.\n", value) );
 *
 *  DEBUGADD(), DEBUGADDC()
 *    Same as DEBUG() and DEBUGC() except the text is appended to the previous
 *    DEBUG(), DEBUGC(), DEBUGADD(), DEBUGADDC() with out another interviening 
 *    header.
 *
 *    Example: DEBUGADD( 2, ("Some text and a valu %d.\n", value) );
 *             DEBUGADDC( DBGC_TDB, 2, ("Some text and a valu %d.\n", value) );
 *
 * Note: If the debug class has not be redeined (see above) then the optimizer 
 * will remove the extra conditional test.
 */

#define DEBUGLVL( level ) \
  ( ((DEBUGLEVEL_CLASS[ DBGC_CLASS ] >= (level))||  \
     (DEBUGLEVEL_CLASS[ DBGC_ALL   ] >= (level))  ) \
   && dbghdr( level, FILE_MACRO, FUNCTION_MACRO, (__LINE__) ) )


#define DEBUGLVLC( dbgc_class, level ) \
  ( ((DEBUGLEVEL_CLASS[ dbgc_class ] >= (level))||  \
     (DEBUGLEVEL_CLASS[ DBGC_ALL   ] >= (level))  ) \
   && dbghdr( level, FILE_MACRO, FUNCTION_MACRO, (__LINE__) ) )


#define DEBUG( level, body ) \
  (void)( ((DEBUGLEVEL_CLASS[ DBGC_CLASS ] >= (level))||  \
           (DEBUGLEVEL_CLASS[ DBGC_ALL   ] >= (level))  ) \
       && (dbghdr( level, FILE_MACRO, FUNCTION_MACRO, (__LINE__) )) \
       && (dbgtext body) )

#define DEBUGC( dbgc_class, level, body ) \
  (void)( ((DEBUGLEVEL_CLASS[ dbgc_class ] >= (level))||  \
           (DEBUGLEVEL_CLASS[ DBGC_ALL   ] >= (level))  ) \
       && (dbghdr( level, FILE_MACRO, FUNCTION_MACRO, (__LINE__) )) \
       && (dbgtext body) )

#define DEBUGADD( level, body ) \
  (void)( ((DEBUGLEVEL_CLASS[ DBGC_CLASS ] >= (level))||  \
           (DEBUGLEVEL_CLASS[ DBGC_ALL   ] >= (level))  ) \
       && (dbgtext body) )

#define DEBUGADDC( dbgc_class, level, body ) \
  (void)( ((DEBUGLEVEL_CLASS[ dbgc_class ] >= (level))||  \
           (DEBUGLEVEL_CLASS[ DBGC_ALL   ] >= (level))  ) \
       && (dbgtext body) )

#endif

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