2 /* pngdebug.h - Debugging macros for libpng, also used in pngtest.c
4 * Copyright (c) 1998-2011 Glenn Randers-Pehrson
5 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
6 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
8 * Last changed in libpng 1.5.0 [January 6, 2011]
10 * This code is released under the libpng license.
11 * For conditions of distribution and use, see the disclaimer
12 * and license in png.h
15 /* Define PNG_DEBUG at compile time for debugging information. Higher
16 * numbers for PNG_DEBUG mean more debugging information. This has
17 * only been added since version 0.95 so it is not implemented throughout
18 * libpng yet, but more support will be added as needed.
20 * png_debug[1-2]?(level, message ,arg{0-2})
21 * Expands to a statement (either a simple expression or a compound
22 * do..while(0) statement) that outputs a message with parameter
23 * substitution if PNG_DEBUG is defined to 2 or more. If PNG_DEBUG
24 * is undefined, 0 or 1 every png_debug expands to a simple expression
25 * (actually ((void)0)).
27 * level: level of detail of message, starting at 0. A level 'n'
28 * message is preceded by 'n' tab characters (not implemented
29 * on Microsoft compilers unless PNG_DEBUG_FILE is also
30 * defined, to allow debug DLL compilation with no standard IO).
31 * message: a printf(3) style text string. A trailing '\n' is added
33 * arg: 0 to 2 arguments for printf(3) style substitution in message.
37 /* These settings control the formatting of messages in png.c and pngerror.c */
38 /* Moved to pngdebug.h at 1.5.0 */
39 # ifndef PNG_LITERAL_SHARP
40 # define PNG_LITERAL_SHARP 0x23
42 # ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
43 # define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
45 # ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
46 # define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
48 # ifndef PNG_STRING_NEWLINE
49 # define PNG_STRING_NEWLINE "\n"
54 # if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER)
61 # define png_debug(l,m) _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE)
64 # define png_debug1(l,m,p1) _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1)
67 # define png_debug2(l,m,p1,p2) \
68 _RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2)
71 # else /* PNG_DEBUG_FILE || !_MSC_VER */
72 # ifndef PNG_STDIO_SUPPORTED
73 # include <stdio.h> /* not included yet */
75 # ifndef PNG_DEBUG_FILE
76 # define PNG_DEBUG_FILE stderr
77 # endif /* PNG_DEBUG_FILE */
80 /* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on
85 # define png_debug(l,m) \
88 fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
89 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \
93 # define png_debug1(l,m,p1) \
96 fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
97 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \
101 # define png_debug2(l,m,p1,p2) \
104 fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
105 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \
108 # else /* __STDC __ */
110 # define png_debug(l,m) \
114 snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
115 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
116 m,PNG_STRING_NEWLINE); \
117 fprintf(PNG_DEBUG_FILE,format); \
121 # define png_debug1(l,m,p1) \
125 snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
126 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
127 m,PNG_STRING_NEWLINE); \
128 fprintf(PNG_DEBUG_FILE,format,p1); \
132 # define png_debug2(l,m,p1,p2) \
136 snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
137 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
138 m,PNG_STRING_NEWLINE); \
139 fprintf(PNG_DEBUG_FILE,format,p1,p2); \
142 # endif /* __STDC __ */
143 # endif /* (PNG_DEBUG > 1) */
145 # endif /* _MSC_VER */
146 # endif /* (PNG_DEBUG > 0) */
147 #endif /* PNG_DEBUG */
149 # define png_debug(l, m) ((void)0)
152 # define png_debug1(l, m, p1) ((void)0)
155 # define png_debug2(l, m, p1, p2) ((void)0)
157 #endif /* PNGDEBUG_H */