WDL/libpng/pngdebug.h

   1
   2 /* pngdebug.h - Debugging macros for libpng, also used in pngtest.c
   3  *
   4  * Last changed in libpng 1.6.8 [December 19, 2013]
   5  * Copyright (c) 1998-2013 Glenn Randers-Pehrson
   6  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
   7  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
   8  *
   9  * This code is released under the libpng license.
  10  * For conditions of distribution and use, see the disclaimer
  11  * and license in png.h
  12  */
  13
  14 /* Define PNG_DEBUG at compile time for debugging information.  Higher
  15  * numbers for PNG_DEBUG mean more debugging information.  This has
  16  * only been added since version 0.95 so it is not implemented throughout
  17  * libpng yet, but more support will be added as needed.
  18  *
  19  * png_debug[1-2]?(level, message ,arg{0-2})
  20  *   Expands to a statement (either a simple expression or a compound
  21  *   do..while(0) statement) that outputs a message with parameter
  22  *   substitution if PNG_DEBUG is defined to 2 or more.  If PNG_DEBUG
  23  *   is undefined, 0 or 1 every png_debug expands to a simple expression
  24  *   (actually ((void)0)).
  25  *
  26  *   level: level of detail of message, starting at 0.  A level 'n'
  27  *          message is preceded by 'n' 3-space indentations (not implemented
  28  *          on Microsoft compilers unless PNG_DEBUG_FILE is also
  29  *          defined, to allow debug DLL compilation with no standard IO).
  30  *   message: a printf(3) style text string.  A trailing '\n' is added
  31  *            to the message.
  32  *   arg: 0 to 2 arguments for printf(3) style substitution in message.
  33  */
  34 #ifndef PNGDEBUG_H
  35 #define PNGDEBUG_H
  36 /* These settings control the formatting of messages in png.c and pngerror.c */
  37 /* Moved to pngdebug.h at 1.5.0 */
  38 #  ifndef PNG_LITERAL_SHARP
  39 #    define PNG_LITERAL_SHARP 0x23
  40 #  endif
  41 #  ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
  42 #    define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
  43 #  endif
  44 #  ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
  45 #    define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
  46 #  endif
  47 #  ifndef PNG_STRING_NEWLINE
  48 #    define PNG_STRING_NEWLINE "\n"
  49 #  endif
  50
  51 #ifdef PNG_DEBUG
  52 #  if (PNG_DEBUG > 0)
  53 #    if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER)
  54 #      include <crtdbg.h>
  55 #      if (PNG_DEBUG > 1)
  56 #        ifndef _DEBUG
  57 #          define _DEBUG
  58 #        endif
  59 #        ifndef png_debug
  60 #          define png_debug(l,m)  _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE)
  61 #        endif
  62 #        ifndef png_debug1
  63 #          define png_debug1(l,m,p1)  _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1)
  64 #        endif
  65 #        ifndef png_debug2
  66 #          define png_debug2(l,m,p1,p2) \
  67              _RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2)
  68 #        endif
  69 #      endif
  70 #    else /* PNG_DEBUG_FILE || !_MSC_VER */
  71 #      ifndef PNG_STDIO_SUPPORTED
  72 #        include <stdio.h> /* not included yet */
  73 #      endif
  74 #      ifndef PNG_DEBUG_FILE
  75 #        define PNG_DEBUG_FILE stderr
  76 #      endif /* PNG_DEBUG_FILE */
  77
  78 #      if (PNG_DEBUG > 1)
  79 #        ifdef __STDC__
  80 #          ifndef png_debug
  81 #            define png_debug(l,m) \
  82        do { \
  83        int num_tabs=l; \
  84        fprintf(PNG_DEBUG_FILE,"%s" m PNG_STRING_NEWLINE,(num_tabs==1 ? "   " : \
  85          (num_tabs==2 ? "      " : (num_tabs>2 ? "         " : "")))); \
  86        } while (0)
  87 #          endif
  88 #          ifndef png_debug1
  89 #            define png_debug1(l,m,p1) \
  90        do { \
  91        int num_tabs=l; \
  92        fprintf(PNG_DEBUG_FILE,"%s" m PNG_STRING_NEWLINE,(num_tabs==1 ? "   " : \
  93          (num_tabs==2 ? "      " : (num_tabs>2 ? "         " : ""))),p1); \
  94        } while (0)
  95 #          endif
  96 #          ifndef png_debug2
  97 #            define png_debug2(l,m,p1,p2) \
  98        do { \
  99        int num_tabs=l; \
 100        fprintf(PNG_DEBUG_FILE,"%s" m PNG_STRING_NEWLINE,(num_tabs==1 ? "   " : \
 101          (num_tabs==2 ? "      " : (num_tabs>2 ? "         " : ""))),p1,p2);\
 102        } while (0)
 103 #          endif
 104 #        else /* __STDC __ */
 105 #          ifndef png_debug
 106 #            define png_debug(l,m) \
 107        do { \
 108        int num_tabs=l; \
 109        char format[256]; \
 110        snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
 111          (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
 112          m,PNG_STRING_NEWLINE); \
 113        fprintf(PNG_DEBUG_FILE,format); \
 114        } while (0)
 115 #          endif
 116 #          ifndef png_debug1
 117 #            define png_debug1(l,m,p1) \
 118        do { \
 119        int num_tabs=l; \
 120        char format[256]; \
 121        snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
 122          (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
 123          m,PNG_STRING_NEWLINE); \
 124        fprintf(PNG_DEBUG_FILE,format,p1); \
 125        } while (0)
 126 #          endif
 127 #          ifndef png_debug2
 128 #            define png_debug2(l,m,p1,p2) \
 129        do { \
 130        int num_tabs=l; \
 131        char format[256]; \
 132        snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
 133          (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
 134          m,PNG_STRING_NEWLINE); \
 135        fprintf(PNG_DEBUG_FILE,format,p1,p2); \
 136        } while (0)
 137 #          endif
 138 #        endif /* __STDC __ */
 139 #      endif /* (PNG_DEBUG > 1) */
 140
 141 #    endif /* _MSC_VER */
 142 #  endif /* (PNG_DEBUG > 0) */
 143 #endif /* PNG_DEBUG */
 144 #ifndef png_debug
 145 #  define png_debug(l, m) ((void)0)
 146 #endif
 147 #ifndef png_debug1
 148 #  define png_debug1(l, m, p1) ((void)0)
 149 #endif
 150 #ifndef png_debug2
 151 #  define png_debug2(l, m, p1, p2) ((void)0)
 152 #endif
 153 #endif /* PNGDEBUG_H */