2 * This is zf_log.h, modified with Babeltrace prefixes.
3 * See <https://github.com/wonder-mice/zf_log/>.
4 * See logging/LICENSE in the Babeltrace source tree.
9 #ifndef BABELTRACE_LOGGING_INTERNAL_H
10 #define BABELTRACE_LOGGING_INTERNAL_H
14 #include <babeltrace/logging.h>
16 /* To detect incompatible changes you can define BT_LOG_VERSION_REQUIRED to be
17 * the current value of BT_LOG_VERSION before including this file (or via
18 * compiler command line):
20 * #define BT_LOG_VERSION_REQUIRED 4
21 * #include <babeltrace/logging-internal.h>
23 * Compilation will fail when included file has different version.
25 #define BT_LOG_VERSION 4
26 #if defined(BT_LOG_VERSION_REQUIRED)
27 #if BT_LOG_VERSION_REQUIRED != BT_LOG_VERSION
28 #error different bt_log version required
32 /* Log level guideline:
33 * - BT_LOG_FATAL - happened something impossible and absolutely unexpected.
34 * Process can't continue and must be terminated.
35 * Example: division by zero, unexpected modifications from other thread.
36 * - BT_LOG_ERROR - happened something possible, but highly unexpected. The
37 * process is able to recover and continue execution.
38 * Example: out of memory (could also be FATAL if not handled properly).
39 * - BT_LOG_WARN - happened something that *usually* should not happen and
40 * significantly changes application behavior for some period of time.
41 * Example: configuration file not found, auth error.
42 * - BT_LOG_INFO - happened significant life cycle event or major state
44 * Example: app started, user logged in.
45 * - BT_LOG_DEBUG - minimal set of events that could help to reconstruct the
46 * execution path. Usually disabled in release builds.
47 * - BT_LOG_VERBOSE - all other events. Usually disabled in release builds.
49 * *Ideally*, log file of debugged, well tested, production ready application
50 * should be empty or very small. Choosing a right log level is as important as
51 * providing short and self descriptive log message.
53 #define BT_LOG_VERBOSE BT_LOGGING_LEVEL_VERBOSE
54 #define BT_LOG_DEBUG BT_LOGGING_LEVEL_DEBUG
55 #define BT_LOG_INFO BT_LOGGING_LEVEL_INFO
56 #define BT_LOG_WARN BT_LOGGING_LEVEL_WARN
57 #define BT_LOG_ERROR BT_LOGGING_LEVEL_ERROR
58 #define BT_LOG_FATAL BT_LOGGING_LEVEL_FATAL
59 #define BT_LOG_NONE BT_LOGGING_LEVEL_NONE
61 /* "Current" log level is a compile time check and has no runtime overhead. Log
62 * level that is below current log level it said to be "disabled". Otherwise,
63 * it's "enabled". Log messages that are disabled has no runtime overhead - they
64 * are converted to no-op by preprocessor and then eliminated by compiler.
65 * Current log level is configured per compilation module (.c/.cpp/.m file) by
66 * defining BT_LOG_DEF_LEVEL or BT_LOG_LEVEL. BT_LOG_LEVEL has higer priority
67 * and when defined overrides value provided by BT_LOG_DEF_LEVEL.
69 * Common practice is to define default current log level with BT_LOG_DEF_LEVEL
70 * in build script (e.g. Makefile, CMakeLists.txt, gyp, etc.) for the entire
73 * CC_ARGS := -DBT_LOG_DEF_LEVEL=BT_LOG_INFO
75 * And when necessary to override it with BT_LOG_LEVEL in .c/.cpp/.m files
76 * before including bt_log.h:
78 * #define BT_LOG_LEVEL BT_LOG_VERBOSE
79 * #include <babeltrace/logging-internal.h>
81 * If both BT_LOG_DEF_LEVEL and BT_LOG_LEVEL are undefined, then BT_LOG_INFO
82 * will be used for release builds (NDEBUG is defined) and BT_LOG_DEBUG
83 * otherwise (NDEBUG is not defined).
85 #if defined(BT_LOG_LEVEL)
86 #define _BT_LOG_LEVEL BT_LOG_LEVEL
87 #elif defined(BT_LOG_DEF_LEVEL)
88 #define _BT_LOG_LEVEL BT_LOG_DEF_LEVEL
91 #define _BT_LOG_LEVEL BT_LOG_INFO
93 #define _BT_LOG_LEVEL BT_LOG_DEBUG
97 /* "Output" log level is a runtime check. When log level is below output log
98 * level it said to be "turned off" (or just "off" for short). Otherwise it's
99 * "turned on" (or just "on"). Log levels that were "disabled" (see
100 * BT_LOG_LEVEL and BT_LOG_DEF_LEVEL) can't be "turned on", but "enabled" log
101 * levels could be "turned off". Only messages with log level which is
102 * "turned on" will reach output facility. All other messages will be ignored
103 * (and their arguments will not be evaluated). Output log level is a global
104 * property and configured per process using bt_log_set_output_level() function
105 * which can be called at any time.
107 * Though in some cases it could be useful to configure output log level per
108 * compilation module or per library. There are two ways to achieve that:
109 * - Define BT_LOG_OUTPUT_LEVEL to expresion that evaluates to desired output
111 * - Copy bt_log.h and bt_log.c files into your library and build it with
112 * BT_LOG_LIBRARY_PREFIX defined to library specific prefix. See
113 * BT_LOG_LIBRARY_PREFIX for more details.
115 * When defined, BT_LOG_OUTPUT_LEVEL must evaluate to integral value that
116 * corresponds to desired output log level. Use it only when compilation module
117 * is required to have output log level which is different from global output
118 * log level set by bt_log_set_output_level() function. For other cases,
119 * consider defining BT_LOG_LEVEL or using bt_log_set_output_level() function.
123 * #define BT_LOG_OUTPUT_LEVEL g_module_log_level
124 * #include <babeltrace/logging-internal.h>
125 * static int g_module_log_level = BT_LOG_INFO;
126 * static void foo() {
127 * BT_LOGI("Will check g_module_log_level for output log level");
129 * void debug_log(bool on) {
130 * g_module_log_level = on? BT_LOG_DEBUG: BT_LOG_INFO;
133 * Note on performance. This expression will be evaluated each time message is
134 * logged (except when message log level is "disabled" - see BT_LOG_LEVEL for
135 * details). Keep this expression as simple as possible, otherwise it will not
136 * only add runtime overhead, but also will increase size of call site (which
137 * will result in larger executable). The prefered way is to use integer
138 * variable (as in example above). If structure must be used, log_level field
139 * must be the first field in this structure:
141 * #define BT_LOG_OUTPUT_LEVEL (g_config.log_level)
142 * #include <babeltrace/logging-internal.h>
145 * unsigned other_field;
148 * static config g_config = {BT_LOG_INFO, 0, ...};
150 * This allows compiler to generate more compact load instruction (no need to
151 * specify offset since it's zero). Calling a function to get output log level
152 * is generaly a bad idea, since it will increase call site size and runtime
153 * overhead even further.
155 #if defined(BT_LOG_OUTPUT_LEVEL)
156 #define _BT_LOG_OUTPUT_LEVEL BT_LOG_OUTPUT_LEVEL
158 #define _BT_LOG_OUTPUT_LEVEL _bt_log_global_output_lvl
161 /* "Tag" is a compound string that could be associated with a log message. It
162 * consists of tag prefix and tag (both are optional).
164 * Tag prefix is a global property and configured per process using
165 * bt_log_set_tag_prefix() function. Tag prefix identifies context in which
166 * component or module is running (e.g. process name). For example, the same
167 * library could be used in both client and server processes that work on the
168 * same machine. Tag prefix could be used to easily distinguish between them.
169 * For more details about tag prefix see bt_log_set_tag_prefix() function. Tag
172 * Tag identifies component or module. It is configured per compilation module
173 * (.c/.cpp/.m file) by defining BT_LOG_TAG or BT_LOG_DEF_TAG. BT_LOG_TAG has
174 * higer priority and when defined overrides value provided by BT_LOG_DEF_TAG.
175 * When defined, value must evaluate to (const char *), so for strings double
176 * quotes must be used.
178 * Default tag could be defined with BT_LOG_DEF_TAG in build script (e.g.
179 * Makefile, CMakeLists.txt, gyp, etc.) for the entire project or target:
181 * CC_ARGS := -DBT_LOG_DEF_TAG=\"MISC\"
183 * And when necessary could be overriden with BT_LOG_TAG in .c/.cpp/.m files
184 * before including bt_log.h:
186 * #define BT_LOG_TAG "MAIN"
187 * #include <babeltrace/logging-internal.h>
189 * If both BT_LOG_DEF_TAG and BT_LOG_TAG are undefined no tag will be added to
190 * the log message (tag prefix still could be added though).
194 * 04-29 22:43:20.244 40059 1299 I hello.MAIN Number of arguments: 1
196 * | +- tag (e.g. module)
197 * +- tag prefix (e.g. process name)
199 #if defined(BT_LOG_TAG)
200 #define _BT_LOG_TAG BT_LOG_TAG
201 #elif defined(BT_LOG_DEF_TAG)
202 #define _BT_LOG_TAG BT_LOG_DEF_TAG
204 #define _BT_LOG_TAG 0
207 /* Source location is part of a log line that describes location (function or
208 * method name, file name and line number, e.g. "runloop@main.cpp:68") of a
209 * log statement that produced it.
210 * Source location formats are:
211 * - BT_LOG_SRCLOC_NONE - don't add source location to log line.
212 * - BT_LOG_SRCLOC_SHORT - add source location in short form (file and line
213 * number, e.g. "@main.cpp:68").
214 * - BT_LOG_SRCLOC_LONG - add source location in long form (function or method
215 * name, file and line number, e.g. "runloop@main.cpp:68").
217 #define BT_LOG_SRCLOC_NONE 0
218 #define BT_LOG_SRCLOC_SHORT 1
219 #define BT_LOG_SRCLOC_LONG 2
221 /* Source location format is configured per compilation module (.c/.cpp/.m
222 * file) by defining BT_LOG_DEF_SRCLOC or BT_LOG_SRCLOC. BT_LOG_SRCLOC has
223 * higer priority and when defined overrides value provided by
226 * Common practice is to define default format with BT_LOG_DEF_SRCLOC in
227 * build script (e.g. Makefile, CMakeLists.txt, gyp, etc.) for the entire
230 * CC_ARGS := -DBT_LOG_DEF_SRCLOC=BT_LOG_SRCLOC_LONG
232 * And when necessary to override it with BT_LOG_SRCLOC in .c/.cpp/.m files
233 * before including bt_log.h:
235 * #define BT_LOG_SRCLOC BT_LOG_SRCLOC_NONE
236 * #include <babeltrace/logging-internal.h>
238 * If both BT_LOG_DEF_SRCLOC and BT_LOG_SRCLOC are undefined, then
239 * BT_LOG_SRCLOC_NONE will be used for release builds (NDEBUG is defined) and
240 * BT_LOG_SRCLOC_LONG otherwise (NDEBUG is not defined).
242 #if defined(BT_LOG_SRCLOC)
243 #define _BT_LOG_SRCLOC BT_LOG_SRCLOC
244 #elif defined(BT_LOG_DEF_SRCLOC)
245 #define _BT_LOG_SRCLOC BT_LOG_DEF_SRCLOC
248 #define _BT_LOG_SRCLOC BT_LOG_SRCLOC_NONE
250 #define _BT_LOG_SRCLOC BT_LOG_SRCLOC_LONG
253 #if BT_LOG_SRCLOC_LONG == _BT_LOG_SRCLOC
254 #define _BT_LOG_SRCLOC_FUNCTION _BT_LOG_FUNCTION
256 #define _BT_LOG_SRCLOC_FUNCTION 0
259 /* Censoring provides conditional logging of secret information, also known as
260 * Personally Identifiable Information (PII) or Sensitive Personal Information
261 * (SPI). Censoring can be either enabled (BT_LOG_CENSORED) or disabled
262 * (BT_LOG_UNCENSORED). When censoring is enabled, log statements marked as
263 * "secrets" will be ignored and will have zero overhead (arguments also will
266 #define BT_LOG_CENSORED 1
267 #define BT_LOG_UNCENSORED 0
269 /* Censoring is configured per compilation module (.c/.cpp/.m file) by defining
270 * BT_LOG_DEF_CENSORING or BT_LOG_CENSORING. BT_LOG_CENSORING has higer priority
271 * and when defined overrides value provided by BT_LOG_DEF_CENSORING.
273 * Common practice is to define default censoring with BT_LOG_DEF_CENSORING in
274 * build script (e.g. Makefile, CMakeLists.txt, gyp, etc.) for the entire
277 * CC_ARGS := -DBT_LOG_DEF_CENSORING=BT_LOG_CENSORED
279 * And when necessary to override it with BT_LOG_CENSORING in .c/.cpp/.m files
280 * before including bt_log.h (consider doing it only for debug purposes and be
281 * very careful not to push such temporary changes to source control):
283 * #define BT_LOG_CENSORING BT_LOG_UNCENSORED
284 * #include <babeltrace/logging-internal.h>
286 * If both BT_LOG_DEF_CENSORING and BT_LOG_CENSORING are undefined, then
287 * BT_LOG_CENSORED will be used for release builds (NDEBUG is defined) and
288 * BT_LOG_UNCENSORED otherwise (NDEBUG is not defined).
290 #if defined(BT_LOG_CENSORING)
291 #define _BT_LOG_CENSORING BT_LOG_CENSORING
292 #elif defined(BT_LOG_DEF_CENSORING)
293 #define _BT_LOG_CENSORING BT_LOG_DEF_CENSORING
296 #define _BT_LOG_CENSORING BT_LOG_CENSORED
298 #define _BT_LOG_CENSORING BT_LOG_UNCENSORED
302 /* Check censoring at compile time. Evaluates to true when censoring is disabled
303 * (i.e. when secrets will be logged). For example:
307 * getSocialSecurityNumber(ssn);
308 * BT_LOGI("Customer ssn: %s", ssn);
311 * See BT_LOG_SECRET() macro for a more convenient way of guarding single log
314 #define BT_LOG_SECRETS (BT_LOG_UNCENSORED == _BT_LOG_CENSORING)
316 /* Static (compile-time) initialization support allows to configure logging
317 * before entering main() function. This mostly useful in C++ where functions
318 * and methods could be called during initialization of global objects. Those
319 * functions and methods could record log messages too and for that reason
320 * static initialization of logging configuration is customizable.
322 * Macros below allow to specify values to use for initial configuration:
323 * - BT_LOG_EXTERN_TAG_PREFIX - tag prefix (default: none)
324 * - BT_LOG_EXTERN_GLOBAL_FORMAT - global format options (default: see
325 * BT_LOG_MEM_WIDTH in bt_log.c)
326 * - BT_LOG_EXTERN_GLOBAL_OUTPUT - global output facility (default: stderr or
327 * platform specific, see BT_LOG_USE_XXX macros in bt_log.c)
328 * - BT_LOG_EXTERN_GLOBAL_OUTPUT_LEVEL - global output log level (default: 0 -
329 * all levals are "turned on")
331 * For example, in log_config.c:
333 * #include <babeltrace/logging-internal.h>
334 * BT_LOG_DEFINE_TAG_PREFIX = "MyApp";
335 * BT_LOG_DEFINE_GLOBAL_FORMAT = {CUSTOM_MEM_WIDTH};
336 * BT_LOG_DEFINE_GLOBAL_OUTPUT = {BT_LOG_PUT_STD, custom_output_callback, 0};
337 * BT_LOG_DEFINE_GLOBAL_OUTPUT_LEVEL = BT_LOG_INFO;
339 * However, to use any of those macros bt_log library must be compiled with
340 * following macros defined:
341 * - to use BT_LOG_DEFINE_TAG_PREFIX define BT_LOG_EXTERN_TAG_PREFIX
342 * - to use BT_LOG_DEFINE_GLOBAL_FORMAT define BT_LOG_EXTERN_GLOBAL_FORMAT
343 * - to use BT_LOG_DEFINE_GLOBAL_OUTPUT define BT_LOG_EXTERN_GLOBAL_OUTPUT
344 * - to use BT_LOG_DEFINE_GLOBAL_OUTPUT_LEVEL define
345 * BT_LOG_EXTERN_GLOBAL_OUTPUT_LEVEL
347 * When bt_log library compiled with one of BT_LOG_EXTERN_XXX macros defined,
348 * corresponding BT_LOG_DEFINE_XXX macro MUST be used exactly once somewhere.
349 * Otherwise build will fail with link error (undefined symbol).
351 #define BT_LOG_DEFINE_TAG_PREFIX const char *_bt_log_tag_prefix
352 #define BT_LOG_DEFINE_GLOBAL_FORMAT bt_log_format _bt_log_global_format
353 #define BT_LOG_DEFINE_GLOBAL_OUTPUT bt_log_output _bt_log_global_output
354 #define BT_LOG_DEFINE_GLOBAL_OUTPUT_LEVEL int _bt_log_global_output_lvl
356 /* Pointer to global format options. Direct modification is not allowed. Use
357 * bt_log_set_mem_width() instead. Could be used to initialize bt_log_spec
360 * const bt_log_output g_output = {BT_LOG_PUT_STD, output_callback, 0};
361 * const bt_log_spec g_spec = {BT_LOG_GLOBAL_FORMAT, &g_output};
362 * BT_LOGI_AUX(&g_spec, "Hello");
364 #define BT_LOG_GLOBAL_FORMAT ((const bt_log_format *)&_bt_log_global_format)
366 /* Pointer to global output variable. Direct modification is not allowed. Use
367 * bt_log_set_output_v() or bt_log_set_output_p() instead. Could be used to
368 * initialize bt_log_spec structure:
370 * const bt_log_format g_format = {40};
371 * const bt_log_spec g_spec = {g_format, BT_LOG_GLOBAL_OUTPUT};
372 * BT_LOGI_AUX(&g_spec, "Hello");
374 #define BT_LOG_GLOBAL_OUTPUT ((const bt_log_output *)&_bt_log_global_output)
376 /* When defined, all library symbols produced by linker will be prefixed with
377 * provided value. That allows to use bt_log library privately in another
378 * libraries without exposing bt_log symbols in their original form (to avoid
379 * possible conflicts with other libraries / components that also could use
380 * bt_log for logging). Value must be without quotes, for example:
382 * CC_ARGS := -DBT_LOG_LIBRARY_PREFIX=my_lib_
384 * Note, that in this mode BT_LOG_LIBRARY_PREFIX must be defined when building
385 * bt_log library AND it also must be defined to the same value when building
386 * a library that uses it. For example, consider fictional KittyHttp library
387 * that wants to use bt_log for logging. First approach that could be taken is
388 * to add bt_log.h and bt_log.c to the KittyHttp's source code tree directly.
389 * In that case it will be enough just to define BT_LOG_LIBRARY_PREFIX in
390 * KittyHttp's build script:
392 * // KittyHttp/CMakeLists.txt
393 * target_compile_definitions(KittyHttp PRIVATE
394 * "BT_LOG_LIBRARY_PREFIX=KittyHttp_")
396 * If KittyHttp doesn't want to include bt_log source code in its source tree
397 * and wants to build bt_log as a separate library than bt_log library must be
398 * built with BT_LOG_LIBRARY_PREFIX defined to KittyHttp_ AND KittyHttp library
399 * itself also needs to define BT_LOG_LIBRARY_PREFIX to KittyHttp_. It can do
400 * so either in its build script, as in example above, or by providing a
401 * wrapper header that KittyHttp library will need to use instead of bt_log.h:
403 * // KittyHttpLogging.h
404 * #define BT_LOG_LIBRARY_PREFIX KittyHttp_
405 * #include <babeltrace/logging-internal.h>
407 * Regardless of the method chosen, the end result is that bt_log symbols will
408 * be prefixed with "KittyHttp_", so if a user of KittyHttp (say DogeBrowser)
409 * also uses bt_log for logging, they will not interferer with each other. Both
410 * will have their own log level, output facility, format options etc.
412 #ifdef BT_LOG_LIBRARY_PREFIX
413 #define _BT_LOG_DECOR__(prefix, name) prefix ## name
414 #define _BT_LOG_DECOR_(prefix, name) _BT_LOG_DECOR__(prefix, name)
415 #define _BT_LOG_DECOR(name) _BT_LOG_DECOR_(BT_LOG_LIBRARY_PREFIX, name)
417 #define bt_log_set_tag_prefix _BT_LOG_DECOR(bt_log_set_tag_prefix)
418 #define bt_log_set_mem_width _BT_LOG_DECOR(bt_log_set_mem_width)
419 #define bt_log_set_output_level _BT_LOG_DECOR(bt_log_set_output_level)
420 #define bt_log_set_output_v _BT_LOG_DECOR(bt_log_set_output_v)
421 #define bt_log_set_output_p _BT_LOG_DECOR(bt_log_set_output_p)
422 #define bt_log_out_stderr_callback _BT_LOG_DECOR(bt_log_out_stderr_callback)
423 #define _bt_log_tag_prefix _BT_LOG_DECOR(_bt_log_tag_prefix)
424 #define _bt_log_global_format _BT_LOG_DECOR(_bt_log_global_format)
425 #define _bt_log_global_output _BT_LOG_DECOR(_bt_log_global_output)
426 #define _bt_log_global_output_lvl _BT_LOG_DECOR(_bt_log_global_output_lvl)
427 #define _bt_log_write_d _BT_LOG_DECOR(_bt_log_write_d)
428 #define _bt_log_write_aux_d _BT_LOG_DECOR(_bt_log_write_aux_d)
429 #define _bt_log_write _BT_LOG_DECOR(_bt_log_write)
430 #define _bt_log_write_aux _BT_LOG_DECOR(_bt_log_write_aux)
431 #define _bt_log_write_mem_d _BT_LOG_DECOR(_bt_log_write_mem_d)
432 #define _bt_log_write_mem_aux_d _BT_LOG_DECOR(_bt_log_write_mem_aux_d)
433 #define _bt_log_write_mem _BT_LOG_DECOR(_bt_log_write_mem)
434 #define _bt_log_write_mem_aux _BT_LOG_DECOR(_bt_log_write_mem_aux)
435 #define _bt_log_stderr_spec _BT_LOG_DECOR(_bt_log_stderr_spec)
438 #if defined(__printflike)
439 #define _BT_LOG_PRINTFLIKE(str_index, first_to_check) \
440 __printflike(str_index, first_to_check)
441 #elif defined(__GNUC__)
442 #define _BT_LOG_PRINTFLIKE(str_index, first_to_check) \
443 __attribute__((format(__printf__, str_index, first_to_check)))
445 #define _BT_LOG_PRINTFLIKE(str_index, first_to_check)
448 #if (defined(_WIN32) || defined(_WIN64)) && !defined(__GNUC__)
449 #define _BT_LOG_FUNCTION __FUNCTION__
451 #define _BT_LOG_FUNCTION __func__
454 #if defined(_MSC_VER) && !defined(__INTEL_COMPILER)
455 #define _BT_LOG_INLINE __inline
456 #define _BT_LOG_IF(cond) \
457 __pragma(warning(push)) \
458 __pragma(warning(disable:4127)) \
460 __pragma(warning(pop))
461 #define _BT_LOG_WHILE(cond) \
462 __pragma(warning(push)) \
463 __pragma(warning(disable:4127)) \
465 __pragma(warning(pop))
467 #define _BT_LOG_INLINE inline
468 #define _BT_LOG_IF(cond) if(cond)
469 #define _BT_LOG_WHILE(cond) while(cond)
471 #define _BT_LOG_NEVER _BT_LOG_IF(0)
472 #define _BT_LOG_ONCE _BT_LOG_WHILE(0)
478 /* Set tag prefix. Prefix will be separated from the tag with dot ('.').
479 * Use 0 or empty string to disable (default). Common use is to set it to
480 * the process (or build target) name (e.g. to separate client and server
481 * processes). Function will NOT copy provided prefix string, but will store the
482 * pointer. Hence specified prefix string must remain valid. See
483 * BT_LOG_DEFINE_TAG_PREFIX for a way to set it before entering main() function.
484 * See BT_LOG_TAG for more information about tag and tag prefix.
486 void bt_log_set_tag_prefix(const char *const prefix
);
488 /* Set number of bytes per log line in memory (ASCII-HEX) output. Example:
490 * I hello.MAIN 4c6f72656d20697073756d20646f6c6f Lorem ipsum dolo
491 * |<- w bytes ->| |<- w chars ->|
493 * See BT_LOGF_MEM and BT_LOGF_MEM_AUX for more details.
495 void bt_log_set_mem_width(const unsigned w
);
497 /* Set "output" log level. See BT_LOG_LEVEL and BT_LOG_OUTPUT_LEVEL for more
498 * info about log levels.
500 void bt_log_set_output_level(const int lvl
);
502 /* Put mask is a set of flags that define what fields will be added to each
503 * log message. Default value is BT_LOG_PUT_STD and other flags could be used to
504 * alter its behavior. See bt_log_set_output_v() for more details.
506 * Note about BT_LOG_PUT_SRC: it will be added only in debug builds (NDEBUG is
511 BT_LOG_PUT_CTX
= 1 << 0, /* context (time, pid, tid, log level) */
512 BT_LOG_PUT_TAG
= 1 << 1, /* tag (including tag prefix) */
513 BT_LOG_PUT_SRC
= 1 << 2, /* source location (file, line, function) */
514 BT_LOG_PUT_MSG
= 1 << 3, /* message text (formatted string) */
515 BT_LOG_PUT_STD
= 0xffff, /* everything (default) */
518 typedef struct bt_log_message
520 int lvl
; /* Log level of the message */
521 const char *tag
; /* Associated tag (without tag prefix) */
522 char *buf
; /* Buffer start */
523 char *e
; /* Buffer end (last position where EOL with 0 could be written) */
524 char *p
; /* Buffer content end (append position) */
525 char *tag_b
; /* Prefixed tag start */
526 char *tag_e
; /* Prefixed tag end (if != tag_b, points to msg separator) */
527 char *msg_b
; /* Message start (expanded format string) */
531 /* Type of output callback function. It will be called for each log line allowed
532 * by both "current" and "output" log levels ("enabled" and "turned on").
533 * Callback function is allowed to modify content of the buffers pointed by the
534 * msg, but it's not allowed to modify any of msg fields. Buffer pointed by msg
535 * is UTF-8 encoded (no BOM mark).
537 typedef void (*bt_log_output_cb
)(const bt_log_message
*msg
, void *arg
);
539 /* Format options. For more details see bt_log_set_mem_width().
541 typedef struct bt_log_format
543 unsigned mem_width
; /* Bytes per line in memory (ASCII-HEX) dump */
549 typedef struct bt_log_output
551 unsigned mask
; /* What to put into log line buffer (see BT_LOG_PUT_XXX) */
552 void *arg
; /* User provided output callback argument */
553 bt_log_output_cb callback
; /* Output callback function */
557 /* Set output callback function.
559 * Mask allows to control what information will be added to the log line buffer
560 * before callback function is invoked. Default mask value is BT_LOG_PUT_STD.
562 void bt_log_set_output_v(const unsigned mask
, void *const arg
,
563 const bt_log_output_cb callback
);
564 static _BT_LOG_INLINE
void bt_log_set_output_p(const bt_log_output
*const output
)
566 bt_log_set_output_v(output
->mask
, output
->arg
, output
->callback
);
569 /* Used with _AUX macros and allows to override global format and output
570 * facility. Use BT_LOG_GLOBAL_FORMAT and BT_LOG_GLOBAL_OUTPUT for values from
571 * global configuration. Example:
573 * static const bt_log_output module_output = {
574 * BT_LOG_PUT_STD, 0, custom_output_callback
576 * static const bt_log_spec module_spec = {
577 * BT_LOG_GLOBAL_FORMAT, &module_output
579 * BT_LOGI_AUX(&module_spec, "Position: %ix%i", x, y);
581 * See BT_LOGF_AUX and BT_LOGF_MEM_AUX for details.
583 typedef struct bt_log_spec
585 const bt_log_format
*format
;
586 const bt_log_output
*output
;
594 /* Execute log statement if condition is true. Example:
596 * BT_LOG_IF(1 < 2, BT_LOGI("Log this"));
597 * BT_LOG_IF(1 > 2, BT_LOGI("Don't log this"));
599 * Keep in mind though, that if condition can't be evaluated at compile time,
600 * then it will be evaluated at run time. This will increase exectuable size
601 * and can have noticeable performance overhead. Try to limit conditions to
602 * expressions that can be evaluated at compile time.
604 #define BT_LOG_IF(cond, f) do { _BT_LOG_IF((cond)) { f; } } _BT_LOG_ONCE
606 /* Mark log statement as "secret". Log statements that are marked as secrets
607 * will NOT be executed when censoring is enabled (see BT_LOG_CENSORED).
610 * BT_LOG_SECRET(BT_LOGI("Credit card: %s", credit_card));
611 * BT_LOG_SECRET(BT_LOGD_MEM(cipher, cipher_sz, "Cipher bytes:"));
613 #define BT_LOG_SECRET(f) BT_LOG_IF(BT_LOG_SECRETS, f)
615 /* Check "current" log level at compile time (ignoring "output" log level).
616 * Evaluates to true when specified log level is enabled. For example:
618 * #if BT_LOG_ENABLED_DEBUG
619 * const char *const g_enum_strings[] = {
620 * "enum_value_0", "enum_value_1", "enum_value_2"
624 * #if BT_LOG_ENABLED_DEBUG
625 * BT_LOGD("enum value: %s", g_enum_strings[v]);
628 * See BT_LOG_LEVEL for details.
630 #define BT_LOG_ENABLED(lvl) ((lvl) >= _BT_LOG_LEVEL)
631 #define BT_LOG_ENABLED_VERBOSE BT_LOG_ENABLED(BT_LOG_VERBOSE)
632 #define BT_LOG_ENABLED_DEBUG BT_LOG_ENABLED(BT_LOG_DEBUG)
633 #define BT_LOG_ENABLED_INFO BT_LOG_ENABLED(BT_LOG_INFO)
634 #define BT_LOG_ENABLED_WARN BT_LOG_ENABLED(BT_LOG_WARN)
635 #define BT_LOG_ENABLED_ERROR BT_LOG_ENABLED(BT_LOG_ERROR)
636 #define BT_LOG_ENABLED_FATAL BT_LOG_ENABLED(BT_LOG_FATAL)
638 /* Check "output" log level at run time (taking into account "current" log
639 * level as well). Evaluates to true when specified log level is turned on AND
640 * enabled. For example:
642 * if (BT_LOG_ON_DEBUG)
645 * sha256(data_ptr, data_sz, hash);
646 * BT_LOGD("data: len=%u, sha256=%s", data_sz, hash);
649 * See BT_LOG_OUTPUT_LEVEL for details.
651 #define BT_LOG_ON(lvl) \
652 (BT_LOG_ENABLED((lvl)) && (lvl) >= _BT_LOG_OUTPUT_LEVEL)
653 #define BT_LOG_ON_VERBOSE BT_LOG_ON(BT_LOG_VERBOSE)
654 #define BT_LOG_ON_DEBUG BT_LOG_ON(BT_LOG_DEBUG)
655 #define BT_LOG_ON_INFO BT_LOG_ON(BT_LOG_INFO)
656 #define BT_LOG_ON_WARN BT_LOG_ON(BT_LOG_WARN)
657 #define BT_LOG_ON_ERROR BT_LOG_ON(BT_LOG_ERROR)
658 #define BT_LOG_ON_FATAL BT_LOG_ON(BT_LOG_FATAL)
664 extern const char *_bt_log_tag_prefix
;
665 extern bt_log_format _bt_log_global_format
;
666 extern bt_log_output _bt_log_global_output
;
667 extern int _bt_log_global_output_lvl
;
668 extern const bt_log_spec _bt_log_stderr_spec
;
671 void _bt_log_write_d(
672 const char *const func
, const char *const file
, const unsigned line
,
673 const int lvl
, const char *const tag
,
674 const char *const fmt
, ...) _BT_LOG_PRINTFLIKE(6, 7);
677 void _bt_log_write_aux_d(
678 const char *const func
, const char *const file
, const unsigned line
,
679 const bt_log_spec
*const log
, const int lvl
, const char *const tag
,
680 const char *const fmt
, ...) _BT_LOG_PRINTFLIKE(7, 8);
684 const int lvl
, const char *const tag
,
685 const char *const fmt
, ...) _BT_LOG_PRINTFLIKE(3, 4);
688 void _bt_log_write_aux(
689 const bt_log_spec
*const log
, const int lvl
, const char *const tag
,
690 const char *const fmt
, ...) _BT_LOG_PRINTFLIKE(4, 5);
693 void _bt_log_write_mem_d(
694 const char *const func
, const char *const file
, const unsigned line
,
695 const int lvl
, const char *const tag
,
696 const void *const d
, const unsigned d_sz
,
697 const char *const fmt
, ...) _BT_LOG_PRINTFLIKE(8, 9);
700 void _bt_log_write_mem_aux_d(
701 const char *const func
, const char *const file
, const unsigned line
,
702 const bt_log_spec
*const log
, const int lvl
, const char *const tag
,
703 const void *const d
, const unsigned d_sz
,
704 const char *const fmt
, ...) _BT_LOG_PRINTFLIKE(9, 10);
707 void _bt_log_write_mem(
708 const int lvl
, const char *const tag
,
709 const void *const d
, const unsigned d_sz
,
710 const char *const fmt
, ...) _BT_LOG_PRINTFLIKE(5, 6);
713 void _bt_log_write_mem_aux(
714 const bt_log_spec
*const log
, const int lvl
, const char *const tag
,
715 const void *const d
, const unsigned d_sz
,
716 const char *const fmt
, ...) _BT_LOG_PRINTFLIKE(6, 7);
722 /* Message logging macros:
723 * - BT_LOGV("format string", args, ...)
724 * - BT_LOGD("format string", args, ...)
725 * - BT_LOGI("format string", args, ...)
726 * - BT_LOGW("format string", args, ...)
727 * - BT_LOGE("format string", args, ...)
728 * - BT_LOGF("format string", args, ...)
730 * Memory logging macros:
731 * - BT_LOGV_MEM(data_ptr, data_sz, "format string", args, ...)
732 * - BT_LOGD_MEM(data_ptr, data_sz, "format string", args, ...)
733 * - BT_LOGI_MEM(data_ptr, data_sz, "format string", args, ...)
734 * - BT_LOGW_MEM(data_ptr, data_sz, "format string", args, ...)
735 * - BT_LOGE_MEM(data_ptr, data_sz, "format string", args, ...)
736 * - BT_LOGF_MEM(data_ptr, data_sz, "format string", args, ...)
738 * Auxiliary logging macros:
739 * - BT_LOGV_AUX(&log_instance, "format string", args, ...)
740 * - BT_LOGD_AUX(&log_instance, "format string", args, ...)
741 * - BT_LOGI_AUX(&log_instance, "format string", args, ...)
742 * - BT_LOGW_AUX(&log_instance, "format string", args, ...)
743 * - BT_LOGE_AUX(&log_instance, "format string", args, ...)
744 * - BT_LOGF_AUX(&log_instance, "format string", args, ...)
746 * Auxiliary memory logging macros:
747 * - BT_LOGV_MEM_AUX(&log_instance, data_ptr, data_sz, "format string", args, ...)
748 * - BT_LOGD_MEM_AUX(&log_instance, data_ptr, data_sz, "format string", args, ...)
749 * - BT_LOGI_MEM_AUX(&log_instance, data_ptr, data_sz, "format string", args, ...)
750 * - BT_LOGW_MEM_AUX(&log_instance, data_ptr, data_sz, "format string", args, ...)
751 * - BT_LOGE_MEM_AUX(&log_instance, data_ptr, data_sz, "format string", args, ...)
752 * - BT_LOGF_MEM_AUX(&log_instance, data_ptr, data_sz, "format string", args, ...)
754 * Preformatted string logging macros:
755 * - BT_LOGV_STR("preformatted string");
756 * - BT_LOGD_STR("preformatted string");
757 * - BT_LOGI_STR("preformatted string");
758 * - BT_LOGW_STR("preformatted string");
759 * - BT_LOGE_STR("preformatted string");
760 * - BT_LOGF_STR("preformatted string");
762 * Explicit log level and tag macros:
763 * - BT_LOG_WRITE(level, tag, "format string", args, ...)
764 * - BT_LOG_WRITE_MEM(level, tag, data_ptr, data_sz, "format string", args, ...)
765 * - BT_LOG_WRITE_AUX(&log_instance, level, tag, "format string", args, ...)
766 * - BT_LOG_WRITE_MEM_AUX(&log_instance, level, tag, data_ptr, data_sz,
767 * "format string", args, ...)
769 * Format string follows printf() conventions. Both data_ptr and data_sz could
770 * be 0. Tag can be 0 as well. Most compilers will verify that type of arguments
771 * match format specifiers in format string.
773 * Library assuming UTF-8 encoding for all strings (char *), including format
776 #if BT_LOG_SRCLOC_NONE == _BT_LOG_SRCLOC
777 #define BT_LOG_WRITE(lvl, tag, ...) \
779 if (BT_LOG_ON(lvl)) \
780 _bt_log_write(lvl, tag, __VA_ARGS__); \
782 #define BT_LOG_WRITE_MEM(lvl, tag, d, d_sz, ...) \
784 if (BT_LOG_ON(lvl)) \
785 _bt_log_write_mem(lvl, tag, d, d_sz, __VA_ARGS__); \
787 #define BT_LOG_WRITE_AUX(log, lvl, tag, ...) \
789 if (BT_LOG_ON(lvl)) \
790 _bt_log_write_aux(log, lvl, tag, __VA_ARGS__); \
792 #define BT_LOG_WRITE_MEM_AUX(log, lvl, tag, d, d_sz, ...) \
794 if (BT_LOG_ON(lvl)) \
795 _bt_log_write_mem_aux(log, lvl, tag, d, d_sz, __VA_ARGS__); \
798 #define BT_LOG_WRITE(lvl, tag, ...) \
800 if (BT_LOG_ON(lvl)) \
801 _bt_log_write_d(_BT_LOG_SRCLOC_FUNCTION, __FILE__, __LINE__, \
802 lvl, tag, __VA_ARGS__); \
804 #define BT_LOG_WRITE_MEM(lvl, tag, d, d_sz, ...) \
806 if (BT_LOG_ON(lvl)) \
807 _bt_log_write_mem_d(_BT_LOG_SRCLOC_FUNCTION, __FILE__, __LINE__, \
808 lvl, tag, d, d_sz, __VA_ARGS__); \
810 #define BT_LOG_WRITE_AUX(log, lvl, tag, ...) \
812 if (BT_LOG_ON(lvl)) \
813 _bt_log_write_aux_d(_BT_LOG_SRCLOC_FUNCTION, __FILE__, __LINE__, \
814 log, lvl, tag, __VA_ARGS__); \
816 #define BT_LOG_WRITE_MEM_AUX(log, lvl, tag, d, d_sz, ...) \
818 if (BT_LOG_ON(lvl)) \
819 _bt_log_write_mem_aux_d(_BT_LOG_SRCLOC_FUNCTION, __FILE__, __LINE__, \
820 log, lvl, tag, d, d_sz, __VA_ARGS__); \
824 static _BT_LOG_INLINE
void _bt_log_unused(const int dummy
, ...) {(void)dummy
;}
826 #define _BT_LOG_UNUSED(...) \
827 do { _BT_LOG_NEVER _bt_log_unused(0, __VA_ARGS__); } _BT_LOG_ONCE
829 #if BT_LOG_ENABLED_VERBOSE
830 #define BT_LOGV(...) \
831 BT_LOG_WRITE(BT_LOG_VERBOSE, _BT_LOG_TAG, __VA_ARGS__)
832 #define BT_LOGV_AUX(log, ...) \
833 BT_LOG_WRITE_AUX(log, BT_LOG_VERBOSE, _BT_LOG_TAG, __VA_ARGS__)
834 #define BT_LOGV_MEM(d, d_sz, ...) \
835 BT_LOG_WRITE_MEM(BT_LOG_VERBOSE, _BT_LOG_TAG, d, d_sz, __VA_ARGS__)
836 #define BT_LOGV_MEM_AUX(log, d, d_sz, ...) \
837 BT_LOG_WRITE_MEM(log, BT_LOG_VERBOSE, _BT_LOG_TAG, d, d_sz, __VA_ARGS__)
839 #define BT_LOGV(...) _BT_LOG_UNUSED(__VA_ARGS__)
840 #define BT_LOGV_AUX(...) _BT_LOG_UNUSED(__VA_ARGS__)
841 #define BT_LOGV_MEM(...) _BT_LOG_UNUSED(__VA_ARGS__)
842 #define BT_LOGV_MEM_AUX(...) _BT_LOG_UNUSED(__VA_ARGS__)
845 #if BT_LOG_ENABLED_DEBUG
846 #define BT_LOGD(...) \
847 BT_LOG_WRITE(BT_LOG_DEBUG, _BT_LOG_TAG, __VA_ARGS__)
848 #define BT_LOGD_AUX(log, ...) \
849 BT_LOG_WRITE_AUX(log, BT_LOG_DEBUG, _BT_LOG_TAG, __VA_ARGS__)
850 #define BT_LOGD_MEM(d, d_sz, ...) \
851 BT_LOG_WRITE_MEM(BT_LOG_DEBUG, _BT_LOG_TAG, d, d_sz, __VA_ARGS__)
852 #define BT_LOGD_MEM_AUX(log, d, d_sz, ...) \
853 BT_LOG_WRITE_MEM_AUX(log, BT_LOG_DEBUG, _BT_LOG_TAG, d, d_sz, __VA_ARGS__)
855 #define BT_LOGD(...) _BT_LOG_UNUSED(__VA_ARGS__)
856 #define BT_LOGD_AUX(...) _BT_LOG_UNUSED(__VA_ARGS__)
857 #define BT_LOGD_MEM(...) _BT_LOG_UNUSED(__VA_ARGS__)
858 #define BT_LOGD_MEM_AUX(...) _BT_LOG_UNUSED(__VA_ARGS__)
861 #if BT_LOG_ENABLED_INFO
862 #define BT_LOGI(...) \
863 BT_LOG_WRITE(BT_LOG_INFO, _BT_LOG_TAG, __VA_ARGS__)
864 #define BT_LOGI_AUX(log, ...) \
865 BT_LOG_WRITE_AUX(log, BT_LOG_INFO, _BT_LOG_TAG, __VA_ARGS__)
866 #define BT_LOGI_MEM(d, d_sz, ...) \
867 BT_LOG_WRITE_MEM(BT_LOG_INFO, _BT_LOG_TAG, d, d_sz, __VA_ARGS__)
868 #define BT_LOGI_MEM_AUX(log, d, d_sz, ...) \
869 BT_LOG_WRITE_MEM_AUX(log, BT_LOG_INFO, _BT_LOG_TAG, d, d_sz, __VA_ARGS__)
871 #define BT_LOGI(...) _BT_LOG_UNUSED(__VA_ARGS__)
872 #define BT_LOGI_AUX(...) _BT_LOG_UNUSED(__VA_ARGS__)
873 #define BT_LOGI_MEM(...) _BT_LOG_UNUSED(__VA_ARGS__)
874 #define BT_LOGI_MEM_AUX(...) _BT_LOG_UNUSED(__VA_ARGS__)
877 #if BT_LOG_ENABLED_WARN
878 #define BT_LOGW(...) \
879 BT_LOG_WRITE(BT_LOG_WARN, _BT_LOG_TAG, __VA_ARGS__)
880 #define BT_LOGW_AUX(log, ...) \
881 BT_LOG_WRITE_AUX(log, BT_LOG_WARN, _BT_LOG_TAG, __VA_ARGS__)
882 #define BT_LOGW_MEM(d, d_sz, ...) \
883 BT_LOG_WRITE_MEM(BT_LOG_WARN, _BT_LOG_TAG, d, d_sz, __VA_ARGS__)
884 #define BT_LOGW_MEM_AUX(log, d, d_sz, ...) \
885 BT_LOG_WRITE_MEM_AUX(log, BT_LOG_WARN, _BT_LOG_TAG, d, d_sz, __VA_ARGS__)
887 #define BT_LOGW(...) _BT_LOG_UNUSED(__VA_ARGS__)
888 #define BT_LOGW_AUX(...) _BT_LOG_UNUSED(__VA_ARGS__)
889 #define BT_LOGW_MEM(...) _BT_LOG_UNUSED(__VA_ARGS__)
890 #define BT_LOGW_MEM_AUX(...) _BT_LOG_UNUSED(__VA_ARGS__)
893 #if BT_LOG_ENABLED_ERROR
894 #define BT_LOGE(...) \
895 BT_LOG_WRITE(BT_LOG_ERROR, _BT_LOG_TAG, __VA_ARGS__)
896 #define BT_LOGE_AUX(log, ...) \
897 BT_LOG_WRITE_AUX(log, BT_LOG_ERROR, _BT_LOG_TAG, __VA_ARGS__)
898 #define BT_LOGE_MEM(d, d_sz, ...) \
899 BT_LOG_WRITE_MEM(BT_LOG_ERROR, _BT_LOG_TAG, d, d_sz, __VA_ARGS__)
900 #define BT_LOGE_MEM_AUX(log, d, d_sz, ...) \
901 BT_LOG_WRITE_MEM_AUX(log, BT_LOG_ERROR, _BT_LOG_TAG, d, d_sz, __VA_ARGS__)
903 #define BT_LOGE(...) _BT_LOG_UNUSED(__VA_ARGS__)
904 #define BT_LOGE_AUX(...) _BT_LOG_UNUSED(__VA_ARGS__)
905 #define BT_LOGE_MEM(...) _BT_LOG_UNUSED(__VA_ARGS__)
906 #define BT_LOGE_MEM_AUX(...) _BT_LOG_UNUSED(__VA_ARGS__)
909 #if BT_LOG_ENABLED_FATAL
910 #define BT_LOGF(...) \
911 BT_LOG_WRITE(BT_LOG_FATAL, _BT_LOG_TAG, __VA_ARGS__)
912 #define BT_LOGF_AUX(log, ...) \
913 BT_LOG_WRITE_AUX(log, BT_LOG_FATAL, _BT_LOG_TAG, __VA_ARGS__)
914 #define BT_LOGF_MEM(d, d_sz, ...) \
915 BT_LOG_WRITE_MEM(BT_LOG_FATAL, _BT_LOG_TAG, d, d_sz, __VA_ARGS__)
916 #define BT_LOGF_MEM_AUX(log, d, d_sz, ...) \
917 BT_LOG_WRITE_MEM_AUX(log, BT_LOG_FATAL, _BT_LOG_TAG, d, d_sz, __VA_ARGS__)
919 #define BT_LOGF(...) _BT_LOG_UNUSED(__VA_ARGS__)
920 #define BT_LOGF_AUX(...) _BT_LOG_UNUSED(__VA_ARGS__)
921 #define BT_LOGF_MEM(...) _BT_LOG_UNUSED(__VA_ARGS__)
922 #define BT_LOGF_MEM_AUX(...) _BT_LOG_UNUSED(__VA_ARGS__)
925 #define BT_LOGV_STR(s) BT_LOGV("%s", (s))
926 #define BT_LOGD_STR(s) BT_LOGD("%s", (s))
927 #define BT_LOGI_STR(s) BT_LOGI("%s", (s))
928 #define BT_LOGW_STR(s) BT_LOGW("%s", (s))
929 #define BT_LOGE_STR(s) BT_LOGE("%s", (s))
930 #define BT_LOGF_STR(s) BT_LOGF("%s", (s))
936 /* Output to standard error stream. Library uses it by default, though in few
937 * cases it could be necessary to specify it explicitly. For example, when
938 * bt_log library is compiled with BT_LOG_EXTERN_GLOBAL_OUTPUT, application must
939 * define and initialize global output variable:
941 * BT_LOG_DEFINE_GLOBAL_OUTPUT = {BT_LOG_OUT_STDERR};
943 * Another example is when using custom output, stderr could be used as a
944 * fallback when custom output facility failed to initialize:
946 * bt_log_set_output_v(BT_LOG_OUT_STDERR);
948 enum { BT_LOG_OUT_STDERR_MASK
= BT_LOG_PUT_STD
};
949 void bt_log_out_stderr_callback(const bt_log_message
*const msg
, void *arg
);
950 #define BT_LOG_OUT_STDERR BT_LOG_OUT_STDERR_MASK, 0, bt_log_out_stderr_callback
952 /* Predefined spec for stderr. Uses global format options (BT_LOG_GLOBAL_FORMAT)
953 * and BT_LOG_OUT_STDERR. Could be used to force output to stderr for a
954 * particular message. Example:
956 * f = fopen("foo.log", "w");
958 * BT_LOGE_AUX(BT_LOG_STDERR, "Failed to open log file");
960 #define BT_LOG_STDERR (&_bt_log_stderr_spec)
963 int bt_log_get_level_from_env(const char *var
)
965 const char *varval
= getenv(var
);
966 int level
= BT_LOG_NONE
;
972 if (strcmp(varval
, "VERBOSE") == 0 ||
973 strcmp(varval
, "V") == 0) {
974 level
= BT_LOG_VERBOSE
;
975 } else if (strcmp(varval
, "DEBUG") == 0 ||
976 strcmp(varval
, "D") == 0) {
977 level
= BT_LOG_DEBUG
;
978 } else if (strcmp(varval
, "INFO") == 0 ||
979 strcmp(varval
, "I") == 0) {
981 } else if (strcmp(varval
, "WARN") == 0 ||
982 strcmp(varval
, "WARNING") == 0 ||
983 strcmp(varval
, "W") == 0) {
985 } else if (strcmp(varval
, "ERROR") == 0 ||
986 strcmp(varval
, "E") == 0) {
987 level
= BT_LOG_ERROR
;
988 } else if (strcmp(varval
, "FATAL") == 0 ||
989 strcmp(varval
, "F") == 0) {
990 level
= BT_LOG_FATAL
;
991 } else if (strcmp(varval
, "NONE") == 0 ||
992 strcmp(varval
, "N") == 0) {
995 /* Should we warn here? How? */