Port: internal logging print format for mingw

[babeltrace.git] / include / babeltrace / logging-internal.h

diff --git a/include/babeltrace/logging-internal.h b/include/babeltrace/logging-internal.h
index 1480a0829c12335f485d2b5e4db186bd4947fa60..21e3a0fd09b89b4c4efc31ecfb769860a85cad2c 100644 (file)
--- a/include/babeltrace/logging-internal.h
+++ b/include/babeltrace/logging-internal.h
@@ -9,7 +9,10 @@
 #ifndef BABELTRACE_LOGGING_INTERNAL_H
 #define BABELTRACE_LOGGING_INTERNAL_H
 
+#include <stdlib.h>
+#include <stdio.h>
 #include <babeltrace/logging.h>
+#include <babeltrace/babeltrace-internal.h>
 
 /* To detect incompatible changes you can define BT_LOG_VERSION_REQUIRED to be
  * the current value of BT_LOG_VERSION before including this file (or via
@@ -153,7 +156,11 @@
 #if defined(BT_LOG_OUTPUT_LEVEL)
        #define _BT_LOG_OUTPUT_LEVEL BT_LOG_OUTPUT_LEVEL
 #else
-       #define _BT_LOG_OUTPUT_LEVEL _bt_log_global_output_lvl
+       /*
+        * We disallow this to make sure Babeltrace modules always
+        * have their own local log level.
+        */
+       #error No log level symbol specified: please define BT_LOG_OUTPUT_LEVEL before including this header.
 #endif
 
 /* "Tag" is a compound string that could be associated with a log message. It
@@ -434,9 +441,16 @@
 #endif
 
 #if defined(__printflike)
-       #define _BT_LOG_PRINTFLIKE(a, b) __printflike(a, b)
+       #define _BT_LOG_PRINTFLIKE(str_index, first_to_check) \
+               __printflike(str_index, first_to_check)
+#elif defined(__MINGW_PRINTF_FORMAT)
+       #define _BT_LOG_PRINTFLIKE(str_index, first_to_check) \
+               __attribute__((format(__MINGW_PRINTF_FORMAT, str_index, first_to_check)))
+#elif defined(__GNUC__)
+       #define _BT_LOG_PRINTFLIKE(str_index, first_to_check) \
+               __attribute__((format(__printf__, str_index, first_to_check)))
 #else
-       #define _BT_LOG_PRINTFLIKE(a, b)
+       #define _BT_LOG_PRINTFLIKE(str_index, first_to_check)
 #endif
 
 #if (defined(_WIN32) || defined(_WIN64)) && !defined(__GNUC__)
@@ -953,8 +967,59 @@ void bt_log_out_stderr_callback(const bt_log_message *const msg, void *arg);
  */
 #define BT_LOG_STDERR (&_bt_log_stderr_spec)
 
+static inline
+int bt_log_get_level_from_env(const char *var)
+{
+       const char *varval = getenv(var);
+       int level = BT_LOG_NONE;
+
+       if (!varval) {
+               goto end;
+       }
+
+       if (strcmp(varval, "VERBOSE") == 0 ||
+                       strcmp(varval, "V") == 0) {
+               level = BT_LOG_VERBOSE;
+       } else if (strcmp(varval, "DEBUG") == 0 ||
+                       strcmp(varval, "D") == 0) {
+               level = BT_LOG_DEBUG;
+       } else if (strcmp(varval, "INFO") == 0 ||
+                       strcmp(varval, "I") == 0) {
+               level = BT_LOG_INFO;
+       } else if (strcmp(varval, "WARN") == 0 ||
+                       strcmp(varval, "WARNING") == 0 ||
+                       strcmp(varval, "W") == 0) {
+               level = BT_LOG_WARN;
+       } else if (strcmp(varval, "ERROR") == 0 ||
+                       strcmp(varval, "E") == 0) {
+               level = BT_LOG_ERROR;
+       } else if (strcmp(varval, "FATAL") == 0 ||
+                       strcmp(varval, "F") == 0) {
+               level = BT_LOG_FATAL;
+       } else if (strcmp(varval, "NONE") == 0 ||
+                       strcmp(varval, "N") == 0) {
+               level = BT_LOG_NONE;
+       } else {
+               /* Should we warn here? How? */
+       }
+
+end:
+       return level;
+}
+
+#define BT_LOG_LEVEL_EXTERN_SYMBOL(_level_sym)                         \
+       extern int _level_sym
+
+#define BT_LOG_INIT_LOG_LEVEL(_level_sym, _env_var)                    \
+       BT_HIDDEN int _level_sym = BT_LOG_NONE;                         \
+       static                                                          \
+       void __attribute__((constructor)) _bt_log_level_ctor(void)      \
+       {                                                               \
+               _level_sym = bt_log_get_level_from_env(_env_var);       \
+       }
+
 #ifdef __cplusplus
 }
 #endif
 
-#endif
+#endif /* BABELTRACE_LOGGING_INTERNAL_H */