/* Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998 Aladdin Enterprises.  All rights reserved.
  
  This file is part of GNU Ghostscript.
  
  GNU Ghostscript is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY.  No author or distributor accepts responsibility
  to anyone for the consequences of using it or for whether it serves any
  particular purpose or works at all, unless he says so in writing.  Refer
  to the GNU General Public License for full details.
  
  Everyone is granted permission to copy, modify and redistribute GNU
  Ghostscript, but only under the conditions described in the GNU General
  Public License.  A copy of this license is supposed to have been given
  to you along with GNU Ghostscript so you can know your rights and
  responsibilities.  It should be in a file named COPYING.  Among other
  things, the copyright notice and this notice must be preserved on all
  copies.
*/

/*$RCSfile: gdebug.h,v $ $Revision: 1.2.2.1 $ */
/* Debugging machinery definitions */

#ifndef gdebug_INCLUDED
#  define gdebug_INCLUDED

/*
 * The compile-time DEBUG symbol determines whether debugging/tracing
 * code is included in the compiled code.  DEBUG may be set or not set
 * independently for every compilation; however, a small amount of support
 * machinery in gsmisc.c is always included in the executable, just
 * in case *some* file was compiled with DEBUG set.
 *
 * When DEBUG is set, it does not cause debugging/tracing printout to occur.
 * Rather, it includes code that produces such printout *if* (a) given
 * one(s) of 128 debugging flags is set.  In this way, one can selectively
 * turn printout on and off during debugging.  (In fact, we even provide a
 * PostScript operator, .setdebug, that does this.)
 *
 * The debugging flags are normally indexed by character code.  This is more
 * than a convention: gs_debug_c, which tests whether a given flag is set,
 * considers that if a flag named by a given upper-case letter is set, the
 * flag named by the corresponding lower-case letter is also set.
 *
 * If the output selected by a given flag can be printed by a single
 * printf, the conventional way to produce the output is
 *      if_debugN('x', "...format...", v1, ..., vN);
 * Usually the flag appears in the output explicitly:
 *      if_debugN('x', "[x]...format...", v1, ..., vN);
 * If the output is more complex, the conventional way to produce the
 * output is
 *      if ( gs_debug_c('x') ) {
 *        ... start each line with dlprintfN(...)
 *        ... produce additional output within a line with dprintfN(...)
 * } */

/* Define the array of debugging flags, indexed by character code. */
extern char gs_debug[128];
bool gs_debug_c(P1(int /*char */ ));

/*
 * Define an alias for a specialized debugging flag
 * that used to be a separate variable.
 */
#define gs_log_errors gs_debug['#']

/* If debugging, direct all error output to gs_debug_out. */
extern FILE *gs_debug_out;

#ifdef DEBUG
#undef dstderr
#define dstderr gs_debug_out
#undef estderr
#define estderr gs_debug_out
#endif

/* Debugging printout macros. */
#ifdef DEBUG
#  define if_debug0(c,s)\
    BEGIN if (gs_debug_c(c)) dlprintf(s); END
#  define if_debug1(c,s,a1)\
    BEGIN if (gs_debug_c(c)) dlprintf1(s,a1); END
#  define if_debug2(c,s,a1,a2)\
    BEGIN if (gs_debug_c(c)) dlprintf2(s,a1,a2); END
#  define if_debug3(c,s,a1,a2,a3)\
    BEGIN if (gs_debug_c(c)) dlprintf3(s,a1,a2,a3); END
#  define if_debug4(c,s,a1,a2,a3,a4)\
    BEGIN if (gs_debug_c(c)) dlprintf4(s,a1,a2,a3,a4); END
#  define if_debug5(c,s,a1,a2,a3,a4,a5)\
    BEGIN if (gs_debug_c(c)) dlprintf5(s,a1,a2,a3,a4,a5); END
#  define if_debug6(c,s,a1,a2,a3,a4,a5,a6)\
    BEGIN if (gs_debug_c(c)) dlprintf6(s,a1,a2,a3,a4,a5,a6); END
#  define if_debug7(c,s,a1,a2,a3,a4,a5,a6,a7)\
    BEGIN if (gs_debug_c(c)) dlprintf7(s,a1,a2,a3,a4,a5,a6,a7); END
#  define if_debug8(c,s,a1,a2,a3,a4,a5,a6,a7,a8)\
    BEGIN if (gs_debug_c(c)) dlprintf8(s,a1,a2,a3,a4,a5,a6,a7,a8); END
#  define if_debug9(c,s,a1,a2,a3,a4,a5,a6,a7,a8,a9)\
    BEGIN if (gs_debug_c(c)) dlprintf9(s,a1,a2,a3,a4,a5,a6,a7,a8,a9); END
#  define if_debug10(c,s,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10)\
    BEGIN if (gs_debug_c(c)) dlprintf10(s,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10); END
#  define if_debug11(c,s,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11)\
    BEGIN if (gs_debug_c(c)) dlprintf11(s,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11); END
#  define if_debug12(c,s,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12)\
    BEGIN if (gs_debug_c(c)) dlprintf12(s,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12); END
#else
#  define if_debug0(c,s) DO_NOTHING
#  define if_debug1(c,s,a1) DO_NOTHING
#  define if_debug2(c,s,a1,a2) DO_NOTHING
#  define if_debug3(c,s,a1,a2,a3) DO_NOTHING
#  define if_debug4(c,s,a1,a2,a3,a4) DO_NOTHING
#  define if_debug5(c,s,a1,a2,a3,a4,a5) DO_NOTHING
#  define if_debug6(c,s,a1,a2,a3,a4,a5,a6) DO_NOTHING
#  define if_debug7(c,s,a1,a2,a3,a4,a5,a6,a7) DO_NOTHING
#  define if_debug8(c,s,a1,a2,a3,a4,a5,a6,a7,a8) DO_NOTHING
#  define if_debug9(c,s,a1,a2,a3,a4,a5,a6,a7,a8,a9) DO_NOTHING
#  define if_debug10(c,s,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10) DO_NOTHING
#  define if_debug11(c,s,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11) DO_NOTHING
#  define if_debug12(c,s,a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12) DO_NOTHING
#endif

/* Debugging support procedures in gsmisc.c */
void debug_dump_bytes(P3(const byte * from, const byte * to,
			 const char *msg));
void debug_dump_bitmap(P4(const byte * from, uint raster, uint height,
			  const char *msg));
void debug_print_string(P2(const byte * str, uint len));

#endif /* gdebug_INCLUDED */
