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2296
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1
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2 /* pngdebug.h - Debugging macros for libpng, also used in pngtest.c
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3 *
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4 * Copyright (c) 1998-2013 Glenn Randers-Pehrson
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5 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
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6 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
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7 *
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8 * Last changed in libpng 1.6.8 [December 19, 2013]
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9 *
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10 * This code is released under the libpng license.
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11 * For conditions of distribution and use, see the disclaimer
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12 * and license in png.h
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13 */
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14
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15 /* Define PNG_DEBUG at compile time for debugging information. Higher
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16 * numbers for PNG_DEBUG mean more debugging information. This has
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17 * only been added since version 0.95 so it is not implemented throughout
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18 * libpng yet, but more support will be added as needed.
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19 *
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20 * png_debug[1-2]?(level, message ,arg{0-2})
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21 * Expands to a statement (either a simple expression or a compound
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22 * do..while(0) statement) that outputs a message with parameter
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23 * substitution if PNG_DEBUG is defined to 2 or more. If PNG_DEBUG
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24 * is undefined, 0 or 1 every png_debug expands to a simple expression
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25 * (actually ((void)0)).
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26 *
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27 * level: level of detail of message, starting at 0. A level 'n'
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28 * message is preceded by 'n' 3-space indentations (not implemented
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29 * on Microsoft compilers unless PNG_DEBUG_FILE is also
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30 * defined, to allow debug DLL compilation with no standard IO).
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31 * message: a printf(3) style text string. A trailing '\n' is added
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32 * to the message.
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33 * arg: 0 to 2 arguments for printf(3) style substitution in message.
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34 */
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35 #ifndef PNGDEBUG_H
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36 #define PNGDEBUG_H
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37 /* These settings control the formatting of messages in png.c and pngerror.c */
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38 /* Moved to pngdebug.h at 1.5.0 */
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39 # ifndef PNG_LITERAL_SHARP
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40 # define PNG_LITERAL_SHARP 0x23
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41 # endif
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42 # ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
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43 # define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
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44 # endif
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45 # ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
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46 # define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
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47 # endif
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48 # ifndef PNG_STRING_NEWLINE
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49 # define PNG_STRING_NEWLINE "\n"
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50 # endif
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51
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52 #ifdef PNG_DEBUG
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53 # if (PNG_DEBUG > 0)
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54 # if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER)
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55 # include <crtdbg.h>
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56 # if (PNG_DEBUG > 1)
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57 # ifndef _DEBUG
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58 # define _DEBUG
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59 # endif
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60 # ifndef png_debug
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61 # define png_debug(l,m) _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE)
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62 # endif
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63 # ifndef png_debug1
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64 # define png_debug1(l,m,p1) _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1)
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65 # endif
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66 # ifndef png_debug2
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67 # define png_debug2(l,m,p1,p2) \
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68 _RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2)
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69 # endif
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70 # endif
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71 # else /* PNG_DEBUG_FILE || !_MSC_VER */
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72 # ifndef PNG_STDIO_SUPPORTED
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73 # include <stdio.h> /* not included yet */
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74 # endif
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75 # ifndef PNG_DEBUG_FILE
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76 # define PNG_DEBUG_FILE stderr
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77 # endif /* PNG_DEBUG_FILE */
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78
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79 # if (PNG_DEBUG > 1)
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80 # ifdef __STDC__
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81 # ifndef png_debug
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82 # define png_debug(l,m) \
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83 do { \
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84 int num_tabs=l; \
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85 fprintf(PNG_DEBUG_FILE,"%s" m PNG_STRING_NEWLINE,(num_tabs==1 ? " " : \
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86 (num_tabs==2 ? " " : (num_tabs>2 ? " " : "")))); \
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87 } while (0)
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88 # endif
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89 # ifndef png_debug1
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90 # define png_debug1(l,m,p1) \
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91 do { \
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92 int num_tabs=l; \
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93 fprintf(PNG_DEBUG_FILE,"%s" m PNG_STRING_NEWLINE,(num_tabs==1 ? " " : \
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94 (num_tabs==2 ? " " : (num_tabs>2 ? " " : ""))),p1); \
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95 } while (0)
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96 # endif
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97 # ifndef png_debug2
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98 # define png_debug2(l,m,p1,p2) \
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99 do { \
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100 int num_tabs=l; \
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101 fprintf(PNG_DEBUG_FILE,"%s" m PNG_STRING_NEWLINE,(num_tabs==1 ? " " : \
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102 (num_tabs==2 ? " " : (num_tabs>2 ? " " : ""))),p1,p2);\
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103 } while (0)
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104 # endif
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105 # else /* __STDC __ */
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106 # ifndef png_debug
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107 # define png_debug(l,m) \
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108 do { \
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109 int num_tabs=l; \
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110 char format[256]; \
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111 snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
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112 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
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113 m,PNG_STRING_NEWLINE); \
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114 fprintf(PNG_DEBUG_FILE,format); \
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115 } while (0)
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116 # endif
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117 # ifndef png_debug1
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118 # define png_debug1(l,m,p1) \
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119 do { \
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120 int num_tabs=l; \
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121 char format[256]; \
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122 snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
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123 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
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124 m,PNG_STRING_NEWLINE); \
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125 fprintf(PNG_DEBUG_FILE,format,p1); \
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126 } while (0)
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127 # endif
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128 # ifndef png_debug2
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129 # define png_debug2(l,m,p1,p2) \
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130 do { \
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131 int num_tabs=l; \
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132 char format[256]; \
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133 snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
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134 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
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135 m,PNG_STRING_NEWLINE); \
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136 fprintf(PNG_DEBUG_FILE,format,p1,p2); \
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137 } while (0)
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138 # endif
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139 # endif /* __STDC __ */
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140 # endif /* (PNG_DEBUG > 1) */
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141
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142 # endif /* _MSC_VER */
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143 # endif /* (PNG_DEBUG > 0) */
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144 #endif /* PNG_DEBUG */
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145 #ifndef png_debug
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146 # define png_debug(l, m) ((void)0)
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147 #endif
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148 #ifndef png_debug1
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149 # define png_debug1(l, m, p1) ((void)0)
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150 #endif
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151 #ifndef png_debug2
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152 # define png_debug2(l, m, p1, p2) ((void)0)
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153 #endif
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154 #endif /* PNGDEBUG_H */
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