1 2 /* pngdebug.h - Debugging macros for libpng, also used in pngtest.c 3 * 4 * Copyright (c) 1998-2013 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 1.6.8 [December 19, 2013] 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' 3-space indentations (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 # ifdef __STDC__ 81 # ifndef png_debug 82 # define png_debug(l,m) \ 83 do { \ 84 int num_tabs=l; \ 85 fprintf(PNG_DEBUG_FILE,"%s" m PNG_STRING_NEWLINE,(num_tabs==1 ? " " : \ 86 (num_tabs==2 ? " " : (num_tabs>2 ? " " : "")))); \ 87 } while (0) 88 # endif 89 # ifndef png_debug1 90 # define png_debug1(l,m,p1) \ 91 do { \ 92 int num_tabs=l; \ 93 fprintf(PNG_DEBUG_FILE,"%s" m PNG_STRING_NEWLINE,(num_tabs==1 ? " " : \ 94 (num_tabs==2 ? " " : (num_tabs>2 ? " " : ""))),p1); \ 95 } while (0) 96 # endif 97 # ifndef png_debug2 98 # define png_debug2(l,m,p1,p2) \ 99 do { \ 100 int num_tabs=l; \ 101 fprintf(PNG_DEBUG_FILE,"%s" m PNG_STRING_NEWLINE,(num_tabs==1 ? " " : \ 102 (num_tabs==2 ? " " : (num_tabs>2 ? " " : ""))),p1,p2);\ 103 } while (0) 104 # endif 105 # else /* __STDC __ */ 106 # ifndef png_debug 107 # define png_debug(l,m) \ 108 do { \ 109 int num_tabs=l; \ 110 char format[256]; \ 111 snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ 112 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ 113 m,PNG_STRING_NEWLINE); \ 114 fprintf(PNG_DEBUG_FILE,format); \ 115 } while (0) 116 # endif 117 # ifndef png_debug1 118 # define png_debug1(l,m,p1) \ 119 do { \ 120 int num_tabs=l; \ 121 char format[256]; \ 122 snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ 123 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ 124 m,PNG_STRING_NEWLINE); \ 125 fprintf(PNG_DEBUG_FILE,format,p1); \ 126 } while (0) 127 # endif 128 # ifndef png_debug2 129 # define png_debug2(l,m,p1,p2) \ 130 do { \ 131 int num_tabs=l; \ 132 char format[256]; \ 133 snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ 134 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ 135 m,PNG_STRING_NEWLINE); \ 136 fprintf(PNG_DEBUG_FILE,format,p1,p2); \ 137 } while (0) 138 # endif 139 # endif /* __STDC __ */ 140 # endif /* (PNG_DEBUG > 1) */ 141 142 # endif /* _MSC_VER */ 143 # endif /* (PNG_DEBUG > 0) */ 144 #endif /* PNG_DEBUG */ 145 #ifndef png_debug 146 # define png_debug(l, m) ((void)0) 147 #endif 148 #ifndef png_debug1 149 # define png_debug1(l, m, p1) ((void)0) 150 #endif 151 #ifndef png_debug2 152 # define png_debug2(l, m, p1, p2) ((void)0) 153 #endif 154 #endif /* PNGDEBUG_H */ 155