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annotate common/logging.h @ 580:cf7e82e91875

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author Andre Heinecke <aheinecke@intevation.de>
date Tue, 27 May 2014 10:29:05 +0000
parents 5e2af38266f6
children 2a4f7364ab81
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1 /* Copyright (C) 2014 by Bundesamt für Sicherheit in der Informationstechnik
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU GPL (v>=2)
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5 * and comes with ABSOLUTELY NO WARRANTY!
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6 * See LICENSE.txt for details.
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7 */
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8 #ifndef COMMON_LOGGING_H
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9 #define COMMON_LOGGING_H
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10
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11 #ifdef __cplusplus
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12 extern "C" {
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13 #endif
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14
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15 /*
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16 * @file
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17 * @brief Logging and debugging functions
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18 */
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19
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20 #include <stdio.h>
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21
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22 #ifdef WIN32
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23
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24 #include <windows.h>
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25
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26 /** @brief Gets the localized error message for the last error
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27 * returned by GetLastError
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28 *
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29 * @returns utf8 error message that needs to be freed by the caller.
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30 **/
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31
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32 char *getLastErrorMsg();
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33
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34 #endif
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35
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36 /**
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37 * @def DEBUGOUTPUT
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38 * @brief If defined code for extra debugging output will be generated.
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39 *
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40 * Will be defined if current build is not an RELEASE_BUILD.
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41 */
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42 #ifndef RELEASE_BUILD
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43 #define DEBUGOUTPUT
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44 #endif
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45
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46 /**
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47 * @def DEBUGPREFIX
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48 * @brief A string prepended to debug output.
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49 *
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50 * Should be defined to indicate which module created the output.
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51 */
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52 #ifndef DEBUGPREFIX
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53 #define DEBUGPREFIX ""
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54 #endif
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55
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56 /**
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57 * @def DEBUGPRINTF(fmt, ...)
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58 * @brief Debug printf
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59 *
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60 * Prints to stderr if DEBUGOUTPUT is defined.
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61 */
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62 #ifdef DEBUGOUTPUT
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63 # ifndef WIN32
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64 # define DEBUGPRINTF(fmt, ...) fprintf(stderr, DEBUGPREFIX "DEBUG: " fmt, ##__VA_ARGS__);
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65 # else /* WIN32 */
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66 # define DEBUGPRINTF(fmt, ...) \
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67 { \
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68 char buf[512]; \
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69 snprintf(buf, 511, "DEBUG: " fmt, ##__VA_ARGS__); \
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70 buf[511] = '\0'; \
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71 OutputDebugStringA(buf); \
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72 }
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73 # endif /* WIN32 */
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74 #else
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75 # define DEBUGPRINTF(fmt, ...)
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76 #endif
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77
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78 /**
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79 * @def ERRORPRINTF(fmt, ...)
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80 * @brief Debug printf
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81 *
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82 * Prints an error to stderr
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83 */
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84 #ifdef WIN32
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85 # define ERRORPRINTF(fmt, ...) \
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86 { \
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87 char buf[512]; \
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88 snprintf(buf, 511, "ERROR: " fmt, ##__VA_ARGS__); \
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89 buf[511] = '\0'; \
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90 OutputDebugStringA(buf); \
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91 }
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92 #else
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93 # define ERRORPRINTF(fmt, ...) fprintf(stderr, DEBUGPREFIX "ERROR: " fmt, ##__VA_ARGS__);
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94 #endif
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95
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96 /**
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97 * @def PRINTLASTERROR(msg)
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98 * @brief Prints the last windows error with a custom message
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99 *
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100 * Prints an error to stderr
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101 */
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102 #define PRINTLASTERROR(msg) \
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103 char *my_error = getLastErrorMsg(); \
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104 if (my_error) { \
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105 ERRORPRINTF(msg" : %s\n", my_error); \
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106 free (my_error); \
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107 } \
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108 ERRORPRINTF ("Failed to get error information\n");
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109
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110
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111 #ifdef __cplusplus
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112 }
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113 #endif
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114
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115 #endif /* COMMON_LOGGING_H */
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