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[wxWidgets.git] / src / png / pngdebug.h
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1
2/* pngdebug.h - Debugging macros for libpng, also used in pngtest.c
3 *
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.)
7 *
8 * Last changed in libpng 1.5.0 [January 6, 2011]
9 *
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
13 */
14
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.
19 *
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)).
26 *
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
32 * to the message.
33 * arg: 0 to 2 arguments for printf(3) style substitution in message.
34 */
35#ifndef PNGDEBUG_H
36#define PNGDEBUG_H
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
41# endif
42# ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
43# define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
44# endif
45# ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
46# define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
47# endif
48# ifndef PNG_STRING_NEWLINE
49# define PNG_STRING_NEWLINE "\n"
50# endif
51
52#ifdef PNG_DEBUG
53# if (PNG_DEBUG > 0)
54# if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER)
55# include <crtdbg.h>
56# if (PNG_DEBUG > 1)
57# ifndef _DEBUG
58# define _DEBUG
59# endif
60# ifndef png_debug
61# define png_debug(l,m) _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE)
62# endif
63# ifndef png_debug1
64# define png_debug1(l,m,p1) _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1)
65# endif
66# ifndef png_debug2
67# define png_debug2(l,m,p1,p2) \
68 _RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2)
69# endif
70# endif
71# else /* PNG_DEBUG_FILE || !_MSC_VER */
72# ifndef PNG_STDIO_SUPPORTED
73# include <stdio.h> /* not included yet */
74# endif
75# ifndef PNG_DEBUG_FILE
76# define PNG_DEBUG_FILE stderr
77# endif /* PNG_DEBUG_FILE */
78
79# if (PNG_DEBUG > 1)
80/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on
81 * non-ISO compilers
82 */
83# ifdef __STDC__
84# ifndef png_debug
85# define png_debug(l,m) \
86 do { \
87 int num_tabs=l; \
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":"")))); \
90 } while (0)
91# endif
92# ifndef png_debug1
93# define png_debug1(l,m,p1) \
94 do { \
95 int num_tabs=l; \
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); \
98 } while (0)
99# endif
100# ifndef png_debug2
101# define png_debug2(l,m,p1,p2) \
102 do { \
103 int num_tabs=l; \
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); \
106 } while (0)
107# endif
108# else /* __STDC __ */
109# ifndef png_debug
110# define png_debug(l,m) \
111 do { \
112 int num_tabs=l; \
113 char format[256]; \
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); \
118 } while (0)
119# endif
120# ifndef png_debug1
121# define png_debug1(l,m,p1) \
122 do { \
123 int num_tabs=l; \
124 char format[256]; \
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); \
129 } while (0)
130# endif
131# ifndef png_debug2
132# define png_debug2(l,m,p1,p2) \
133 do { \
134 int num_tabs=l; \
135 char format[256]; \
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); \
140 } while (0)
141# endif
142# endif /* __STDC __ */
143# endif /* (PNG_DEBUG > 1) */
144
145# endif /* _MSC_VER */
146# endif /* (PNG_DEBUG > 0) */
147#endif /* PNG_DEBUG */
148#ifndef png_debug
149# define png_debug(l, m) ((void)0)
150#endif
151#ifndef png_debug1
152# define png_debug1(l, m, p1) ((void)0)
153#endif
154#ifndef png_debug2
155# define png_debug2(l, m, p1, p2) ((void)0)
156#endif
157#endif /* PNGDEBUG_H */