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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 */ |