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 *

 * Copyright (c) 1998-2011 Glenn Randers-Pehrson

 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)

 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

 *

 * Last changed in libpng 1.5.0 [January 6, 2011]

 *

 * This code is released under the libpng license.

 * For conditions of distribution and use, see the disclaimer

 * and license in png.h

 */

 * numbers for PNG_DEBUG mean more debugging information.  This has

 * only been added since version 0.95 so it is not implemented throughout

 * libpng yet, but more support will be added as needed.

 *

 * png_debug[1-2]?(level, message ,arg{0-2})

 *   Expands to a statement (either a simple expression or a compound

 *   do..while(0) statement) that outputs a message with parameter

 *   substitution if PNG_DEBUG is defined to 2 or more.  If PNG_DEBUG

 *   is undefined, 0 or 1 every png_debug expands to a simple expression

 *   (actually ((void)0)).

 *

 *   level: level of detail of message, starting at 0.  A level 'n'

 *          message is preceded by 'n' tab characters (not implemented

 *          on Microsoft compilers unless PNG_DEBUG_FILE is also

 *          defined, to allow debug DLL compilation with no standard IO).

 *   message: a printf(3) style text string.  A trailing '\n' is added

 *            to the message.

 *   arg: 0 to 2 arguments for printf(3) style substitution in message.

 */

#ifndef PNGDEBUG_H

#define PNGDEBUG_H

/* These settings control the formatting of messages in png.c and pngerror.c */

/* Moved to pngdebug.h at 1.5.0 */

#  ifndef PNG_LITERAL_SHARP

#    define PNG_LITERAL_SHARP 0x23

#  endif

#  ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET

#    define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b

#  endif

#  ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET

#    define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d

#  endif

#  ifndef PNG_STRING_NEWLINE

#    define PNG_STRING_NEWLINE "\n"

#  endif

#  if (PNG_DEBUG > 0)

#    if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER)

#      include 

#      if (PNG_DEBUG > 1)

#        ifndef _DEBUG

#          define _DEBUG

#        endif

#        ifndef png_debug

#          define png_debug(l,m)  _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE)

#        endif

#        ifndef png_debug1

#          define png_debug1(l,m,p1)  _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1)

#        endif

#        ifndef png_debug2

#          define png_debug2(l,m,p1,p2) \

             _RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2)

#        endif

#      endif

#    else /* PNG_DEBUG_FILE || !_MSC_VER */

#      ifndef PNG_STDIO_SUPPORTED

#        include  /* not included yet */

#      endif

#      ifndef PNG_DEBUG_FILE

#        define PNG_DEBUG_FILE stderr

#      endif /* PNG_DEBUG_FILE */

/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on

 * non-ISO compilers

 */

#        ifdef __STDC__

#          ifndef png_debug

#            define png_debug(l,m) \

       do { \

       int num_tabs=l; \

       fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \

         (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \

       } while (0)

#          endif

#          ifndef png_debug1

#            define png_debug1(l,m,p1) \

       do { \

       int num_tabs=l; \

       fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \

         (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \

       } while (0)

#          endif

#          ifndef png_debug2

#            define png_debug2(l,m,p1,p2) \

       do { \

       int num_tabs=l; \

       fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \

         (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \

       } while (0)

#          endif

#        else /* __STDC __ */

#          ifndef png_debug

#            define png_debug(l,m) \

       do { \

       int num_tabs=l; \

       char format[256]; \

       snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \

         (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \

         m,PNG_STRING_NEWLINE); \

       fprintf(PNG_DEBUG_FILE,format); \

       } while (0)

#          endif

#          ifndef png_debug1

#            define png_debug1(l,m,p1) \

       do { \

       int num_tabs=l; \

       char format[256]; \

       snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \

         (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \

         m,PNG_STRING_NEWLINE); \

       fprintf(PNG_DEBUG_FILE,format,p1); \

       } while (0)

#          endif

#          ifndef png_debug2

#            define png_debug2(l,m,p1,p2) \

       do { \

       int num_tabs=l; \

       char format[256]; \

       snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \

         (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \

         m,PNG_STRING_NEWLINE); \

       fprintf(PNG_DEBUG_FILE,format,p1,p2); \

       } while (0)

#          endif

#        endif /* __STDC __ */

#      endif /* (PNG_DEBUG > 1) */

#  endif /* (PNG_DEBUG > 0) */

#endif /* PNG_DEBUG */

#ifndef png_debug

#  define png_debug(l, m) ((void)0)

#endif

#ifndef png_debug1

#  define png_debug1(l, m, p1) ((void)0)

#endif

#ifndef png_debug2

#  define png_debug2(l, m, p1, p2) ((void)0)

#endif

#endif /* PNGDEBUG_H */