libgphoto2 photo camera library (libgphoto2) API: libgphoto2_port/gphoto2/gphoto2-port-log.h Source File

libgphoto2 photo camera library (libgphoto2) API 2.5.10

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gphoto2-port-log.h
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1
21 #ifndef __GPHOTO2_PORT_LOG_H__
22 #define __GPHOTO2_PORT_LOG_H__
23
24 #include <stdarg.h>
25
30 typedef enum {
31 GP_LOG_ERROR = 0,
32 GP_LOG_VERBOSE = 1,
33 GP_LOG_DEBUG = 2,
34 GP_LOG_DATA = 3
35 } GPLogLevel;
36
46 #define GP_LOG_ALL GP_LOG_DATA
47
61 typedef void (* GPLogFunc) (GPLogLevel level, const char *domain, const char *str, void *data);
62
63 #ifndef DISABLE_DEBUGGING
64
65 int gp_log_add_func (GPLogLevel level, GPLogFunc func, void *data);
66 int gp_log_remove_func (int id);
67
68 /* Logging */
69 void gp_log (GPLogLevel level, const char *domain,
70 const char *format, ...)
71 #ifdef __GNUC__
72 __attribute__((__format__(printf,3,4)))
73 #endif
74 ;
75 void gp_log_with_source_location(
76 GPLogLevel level, const char *file, int line, const char *func,
77 const char *format, ...)
78 #ifdef __GNUC__
79 __attribute__((__format__(printf,5,6)))
80 #endif
81 ;
82 void gp_logv (GPLogLevel level, const char *domain, const char *format,
83 va_list args)
84 #ifdef __GNUC__
85 __attribute__((__format__(printf,3,0)))
86 #endif
87 ;
88 void gp_log_data (const char *domain, const char *data, unsigned int size,
89 const char *format, ...)
90 #ifdef __GNUC__
91 __attribute__((__format__(printf,4,5)))
92 #endif
93 ;
94
95 /*
96 * GP_DEBUG:
97 * msg: message to log
98 * params: params to message
99 *
100 * Logs message at log level #GP_LOG_DEBUG by calling #gp_log() with
101 * an automatically generated domain
102 * You have to define GP_MODULE as "mymod" for your module
103 * mymod before using #GP_DEBUG().
104 */
105
106 #ifdef _GPHOTO2_INTERNAL_CODE
107 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
108 #define GP_DEBUG(...) \
109 gp_log(GP_LOG_DEBUG, GP_MODULE "/" __FILE__, __VA_ARGS__)
110
111 /*
112 * GP_LOG_D/E:
113 * simple helper macros for convenient and consistent logging of error
114 * and debug messages including information about the source location.
115 */
116 #define GP_LOG_D(...) gp_log(GP_LOG_DEBUG, __func__, __VA_ARGS__)
117 #define GP_LOG_E(...) gp_log_with_source_location(GP_LOG_ERROR, __FILE__, __LINE__, __func__, __VA_ARGS__)
118 #define GP_LOG_DATA(DATA, SIZE, MSG, ...) gp_log_data(__func__, DATA, SIZE, MSG, ##__VA_ARGS__)
119
120 #elif defined(__GNUC__) && __GNUC__ >= 2
121 #define GP_DEBUG(msg, params...) \
122 gp_log(GP_LOG_DEBUG, GP_MODULE "/" __FILE__, msg, ##params)
123 /*
124 * GP_LOG_D/E:
125 * simple helper macros for convenient and consistent logging of error
126 * and debug messages including information about the source location.
127 */
128 #define GP_LOG_D(...) gp_log(GP_LOG_DEBUG, __func__, __VA_ARGS__)
129 #define GP_LOG_E(...) gp_log_with_source_location(GP_LOG_ERROR, __FILE__, __LINE__, __func__, __VA_ARGS__)
130 #define GP_LOG_DATA(DATA, SIZE, MSG, ...) gp_log_data(__func__, DATA, SIZE, MSG, ##__VA_ARGS__)
131
132 #else
133 # ifdef __GNUC__
134 # warning Disabling GP_DEBUG because variadic macros are not allowed
135 # endif
136 #define GP_DEBUG (void)
137 #define GP_LOG_D(...) /* no-op */
138 #define GP_LOG_E(...) /* no-op */
139 #define GP_LOG_DATA(DATA, SIZE, ...) /* no-op */
140 #endif
141 #endif /* _GPHOTO2_INTERNAL_CODE */
142
143 #else /* DISABLE_DEBUGGING */
144
145 /* Stub these functions out if debugging is disabled */
146 #define gp_log_add_func(level, func, data) (0)
147 #define gp_log_remove_func(id) (0)
148 #define gp_log(level, domain, format, args...)
149 #define gp_log_with_source_location(level, file, line, func, format, ...)
150 #define gp_logv(level, domain, format, args)
151 #define gp_log_data(domain, data, size)
152
153 #ifdef _GPHOTO2_INTERNAL_CODE
154 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
155 #define GP_DEBUG(...) /* no-op */
156 #define GP_LOG_D(...) /* no-op */
157 #define GP_LOG_E(...) /* no-op */
158 #define GP_LOG_DATA(DATA, SIZE, ...) /* no-op */
159
160 #elif defined(__GNUC__)
161 #define GP_DEBUG(msg, params...) /* no-op */
162 #define GP_LOG_D(...) /* no-op */
163 #define GP_LOG_E(...) /* no-op */
164 #define GP_LOG_DATA(DATA, SIZE, ...) /* no-op */
165 #else
166 #define GP_DEBUG (void)
167 #define GP_LOG_D (void /* no-op */
168 #define GP_LOG_E (void) /* no-op */
169 #define GP_LOG_DATA(void) /* no-op */
170 #endif
171 #endif /* _GPHOTO2_INTERNAL_CODE */
172
173 #endif /* DISABLE_DEBUGGING */
174
175 #ifdef _GPHOTO2_INTERNAL_CODE
176
177 typedef struct StringFlagItem {
178 char *str;
179 unsigned int flag;
180 } StringFlagItem;
181
182 typedef void (*string_item_func) (const char *str, void *data);
183
184 const char *
185 gpi_enum_to_string(const unsigned int _enum,
186 const StringFlagItem *map);
187
188 int
189 gpi_string_to_enum(const char *str,
190 unsigned int *result,
191 const StringFlagItem *map);
192
193 void
194 gpi_flags_to_string_list(const unsigned int flags,
195 const StringFlagItem *map,
196 string_item_func func, void *data);
197
198 int
199 gpi_string_or_to_flags(const char *str,
200 unsigned int *flags,
201 const StringFlagItem *map);
202
203 unsigned int
204 gpi_string_to_flag(const char *str,
205 const StringFlagItem *map);
206
207 unsigned int
208 gpi_string_list_to_flags(const char *str[],
209 const StringFlagItem *map);
210
211 /* Allocates a sufficiently large buffer and interpolates the format
212 * string with the proveded va_list args. The returned memory has to
213 * be freed by the caller. */
214 char*
215 gpi_vsnprintf (const char* format, va_list args);
216
217 #define C_MEM(MEM) do {\
218 if ((MEM) == NULL) {\
219 GP_LOG_E ("Out of memory: '%s' failed.", #MEM);\
220 return GP_ERROR_NO_MEMORY;\
221 }\
222 } while(0)
223
224 #define C_PARAMS(PARAMS) do {\
225 if (!(PARAMS)) {\
226 GP_LOG_E ("Invalid parameters: '%s' is NULL/FALSE.", #PARAMS);\
227 return GP_ERROR_BAD_PARAMETERS;\
228 }\
229 } while(0)
230
231 #define C_PARAMS_MSG(PARAMS, MSG, ...) do {\
232 if (!(PARAMS)) {\
233 GP_LOG_E ("Invalid parameters: " #MSG " ('%s' is NULL/FALSE.)", ##__VA_ARGS__, #PARAMS);\
234 return GP_ERROR_BAD_PARAMETERS;\
235 }\
236 } while(0)
237
238 #endif /* _GPHOTO2_INTERNAL_CODE */
239
240 #endif /* __GPHOTO2_PORT_LOG_H__ */
GPLogFunc
void(* GPLogFunc)(GPLogLevel level, const char *domain, const char *str, void *data)
Logging function hook.
Definition: gphoto2-port-log.h:61
GP_LOG_DATA
Log message is a data hex dump.
Definition: gphoto2-port-log.h:34
gp_log_data
void gp_log_data(const char *domain, const char *data, unsigned int size, const char *format,...)
Log data.
Definition: gphoto2-port-log.c:205
gp_logv
void gp_logv(GPLogLevel level, const char *domain, const char *format, va_list args)
Log a debug or error message with va_list.
Definition: gphoto2-port-log.c:299
GP_LOG_VERBOSE
Log message is an verbose debug infomation.
Definition: gphoto2-port-log.h:32
gp_log_add_func
int gp_log_add_func(GPLogLevel level, GPLogFunc func, void *data)
Add a function to get logging information.
Definition: gphoto2-port-log.c:82
GP_LOG_DEBUG
Log message is an debug infomation.
Definition: gphoto2-port-log.h:33
GPLogLevel
GPLogLevel
Logging level Specifies the logging severity level.
Definition: gphoto2-port-log.h:30
GP_LOG_ERROR
Log message is an error infomation.
Definition: gphoto2-port-log.h:31
gp_log
void gp_log(GPLogLevel level, const char *domain, const char *format,...)
Log a debug or error message.
Definition: gphoto2-port-log.c:331
gp_log_remove_func
int gp_log_remove_func(int id)
Remove a logging receiving function.
Definition: gphoto2-port-log.c:138