/* Copyright (C) 2001-2006 Artifex Software, Inc.
   All Rights Reserved.

   This software is provided AS-IS with no warranty, either express or
   implied.

   This software is distributed under license and may not be copied, modified
   or distributed except as expressly authorized under the terms of that
   license.  Refer to licensing information at http://www.artifex.com/
   or contact Artifex Software, Inc.,  7 Mt. Lassen Drive - Suite A-134,
   San Rafael, CA  94903, U.S.A., +1(415)492-9861, for further information.
*/
/* $Id$ */
/* 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.  Originally
 * this was 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.
 *
 * The new code uses a 'implication' table that allows us to be more general;
 * any debug flag can now 'imply' another one. By default this is setup
 * to give the same behaviour as before, but newly added flags are not
 * constrained in the same way - we can have A -> B -> C etc or can have
 * upper case flags that don't imply lower case ones.
 *
 * 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(...)
 * } */


typedef enum {
#define FLAG(a,b,c,d) gs_debug_flag_ ## a = b
#define UNUSED(a)
#include "gdbflags.h"
#undef FLAG
#undef UNUSED
} gs_debug_flag;

typedef struct {
    int used;
    char short_desc[20];
    char long_desc[80];
} gs_debug_flag_details;

#define gs_debug_flags_max 127
extern const byte gs_debug_flag_implied_by[gs_debug_flags_max];
extern const gs_debug_flag_details gs_debug_flags[gs_debug_flags_max];


int gs_debug_flags_parse(gs_memory_t *heap, const char *arg);
void gs_debug_flags_list(gs_memory_t *heap);

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

/* 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(const byte * from, const byte * to,
                      const char *msg);
void debug_dump_bitmap(const byte * from, uint raster, uint height,
                       const char *msg);
void debug_print_string(const byte * str, uint len);
void debug_print_string_hex(const byte * str, uint len);

#endif /* gdebug_INCLUDED */