Merge pull request #199 from swift-nav/mfine-logging

log_ logging

Author: mfine

include/libswiftnav/logging.h

@@ -15,6 +15,8 @@
 
 #include <stdio.h>
 
+#include "common.h"
+
 /* DEBUG off by default, enable it on a per-file basis. */
 #ifndef DEBUG
 #define DEBUG 0
@@ -31,28 +33,59 @@
  *
  * \{ */
 
+extern void log_(u8 level, const char *msg, ...) __attribute__ ((weak));
+
+#define LOG_EMERG       0       /* system is unusable */
+#define LOG_ALERT       1       /* action must be taken immediately */
+#define LOG_CRIT        2       /* critical conditions */
+#define LOG_ERROR       3       /* error conditions */
+#define LOG_WARN        4       /* warning conditions */
+#define LOG_NOTICE      5       /* normal but significant condition */
+#define LOG_INFO        6       /* informational */
+#define LOG_DEBUG       7       /* debug-level messages */
+
+/** Log an emergency.
+ * \param args `printf` style format and arguments.
+ */
+#define log_emerg(args...) log_(LOG_EMERG, args)
+
+/** Log an alert.
+ * \param args `printf` style format and arguments.
+ */
+#define log_alert(args...) log_(LOG_ALERT, args)
+
+/** Log a critical event.
+ * \param args `printf` style format and arguments.
+ */
+#define log_crit(args...) log_(LOG_CRIT, args)
+
 /** Log an error.
  * \param args `printf` style format and arguments.
  */
-#define log_error(args...) printf("ERROR: " args)
+#define log_error(args...) log_(LOG_ERROR, args)
 
 /** Log a warning.
  * \param args `printf` style format and arguments.
  */
-#define log_warn(args...)  printf("WARNING: " args)
+#define log_warn(args...)  log_(LOG_WARN, args)
+
+/** Log a notice.
+ * \param args `printf` style format and arguments.
+ */
+#define log_notice(args...)  log_(LOG_NOTICE, args)
 
 /** Log an information message.
  * \param args `printf` style format and arguments.
  */
-#define log_info(args...)  printf("INFO: " args)
+#define log_info(args...)  log_(LOG_INFO, args)
 
 /** Log a debugging message.
  * \param args `printf` style format and arguments.
  */
 #define log_debug(args...)  \
 do {                        \
   if (DEBUG) {              \
-    printf("DEBUG: " args); \
+    log_(LOG_DEBUG, args);  \
   }                         \
 } while (0)
 

src/CMakeLists.txt

@@ -15,6 +15,7 @@ set_source_files_properties(${plover_SRCS} PROPERTIES GENERATED TRUE)
 set_source_files_properties(${plover_HDRS} PROPERTIES GENERATED TRUE)
 
 set(libswiftnav_SRCS
+  logging.c
   ephemeris.c
   nav_msg.c
   pvt.c

src/logging.c

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2015 Swift Navigation Inc.
+ * Contact: Fergus Noble <fergus@swift-nav.com>
+ *
+ * This source is subject to the license found in the file 'LICENSE' which must
+ * be be distributed together with this source. All other rights reserved.
+ *
+ * THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND,
+ * EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include <stdarg.h>
+
+#include "logging.h"
+
+/** \defgroup logging Logging
+ * Logging functions.
+ * \{ */
+
+const char *level_string[] = {
+  "EMERGENCY",
+  "ALERT",
+  "CRITICAL",
+  "ERROR",
+  "WARNING",
+  "NOTICE",
+  "INFO",
+  "DEBUG",
+};
+
+/** Log message by level.
+ *
+ * \param level Log level
+ * \param msg Log contents
+ */
+void log_(u8 level, const char *msg, ...)
+{
+  va_list ap;
+
+  printf("%s: ", level_string[level]);
+  va_start(ap, msg);
+  vprintf(msg, ap);
+  va_end(ap);
+}
+
+/* \} */