Add loggerName to the Appender interface

On Darwin platforms using os_log, a separate logger can be created for
each differently named logger. The Appender, which directs the text of
the log message, needs to know which logger to direct it to.

src/nativeMain/kotlin/mu/Appender.kt

@@ -1,9 +1,9 @@
 package mu
 
 public interface Appender {
-    public fun trace(message: Any?)
-    public fun debug(message: Any?)
-    public fun info(message: Any?)
-    public fun warn(message: Any?)
-    public fun error(message: Any?)
+    public fun trace(loggerName: String, message: String)
+    public fun debug(loggerName: String, message: String)
+    public fun info(loggerName: String, message: String)
+    public fun warn(loggerName: String, message: String)
+    public fun error(loggerName: String, message: String)
 }

src/nativeMain/kotlin/mu/ConsoleOutputAppender.kt

@@ -4,12 +4,12 @@ import platform.posix.fprintf
 import platform.posix.stderr
 
 public object ConsoleOutputAppender : Appender {
-    public override fun trace(message: Any?): Unit = println(message)
-    public override fun debug(message: Any?): Unit = println(message)
-    public override fun info(message: Any?): Unit = println(message)
-    public override fun warn(message: Any?): Unit = println(message)
+    public override fun trace(loggerName: String, message: String): Unit = println(message)
+    public override fun debug(loggerName: String, message: String): Unit = println(message)
+    public override fun info(loggerName: String, message: String): Unit = println(message)
+    public override fun warn(loggerName: String, message: String): Unit = println(message)
 
-    override fun error(message: Any?) {
+    override fun error(loggerName: String, message: String) {
         fprintf(stderr, "$message\n")
     }
 }

src/nativeMain/kotlin/mu/Formatter.kt

@@ -1,14 +1,14 @@
 package mu
 
 public interface Formatter {
-    public fun formatMessage(level: KotlinLoggingLevel, loggerName: String, msg: () -> Any?): Any?
-    public fun formatMessage(level: KotlinLoggingLevel, loggerName: String, t: Throwable?, msg: () -> Any?): Any?
-    public fun formatMessage(level: KotlinLoggingLevel, loggerName: String, marker: Marker?, msg: () -> Any?): Any?
+    public fun formatMessage(level: KotlinLoggingLevel, loggerName: String, msg: () -> Any?): String
+    public fun formatMessage(level: KotlinLoggingLevel, loggerName: String, t: Throwable?, msg: () -> Any?): String
+    public fun formatMessage(level: KotlinLoggingLevel, loggerName: String, marker: Marker?, msg: () -> Any?): String
     public fun formatMessage(
         level: KotlinLoggingLevel,
         loggerName: String,
         marker: Marker?,
         t: Throwable?,
         msg: () -> Any?
-    ): Any?
+    ): String
 }

src/nativeMain/kotlin/mu/internal/KLoggerLinux.kt

@@ -57,32 +57,32 @@ internal class KLoggerLinux(
     override fun error(marker: Marker?, t: Throwable?, msg: () -> Any?) =
         ERROR.logIfEnabled(marker, msg, t, appender::error)
 
-    private fun KotlinLoggingLevel.logIfEnabled(msg: () -> Any?, logFunction: (Any?) -> Unit) {
+    private fun KotlinLoggingLevel.logIfEnabled(msg: () -> Any?, logFunction: (String, String) -> Unit) {
         if (isLoggingEnabled()) {
-            logFunction(formatter.formatMessage(this, loggerName, msg))
+            logFunction(loggerName, formatter.formatMessage(this, loggerName, msg))
         }
     }
 
-    private fun KotlinLoggingLevel.logIfEnabled(msg: () -> Any?, t: Throwable?, logFunction: (Any?) -> Unit) {
+    private fun KotlinLoggingLevel.logIfEnabled(msg: () -> Any?, t: Throwable?, logFunction: (String, String) -> Unit) {
         if (isLoggingEnabled()) {
-            logFunction(formatter.formatMessage(this, loggerName, t, msg))
+            logFunction(loggerName, formatter.formatMessage(this, loggerName, t, msg))
         }
     }
 
-    private fun KotlinLoggingLevel.logIfEnabled(marker: Marker?, msg: () -> Any?, logFunction: (Any?) -> Unit) {
+    private fun KotlinLoggingLevel.logIfEnabled(marker: Marker?, msg: () -> Any?, logFunction: (String, String) -> Unit) {
         if (isLoggingEnabled()) {
-            logFunction(formatter.formatMessage(this, loggerName, marker, msg))
+            logFunction(loggerName, formatter.formatMessage(this, loggerName, marker, msg))
         }
     }
 
     private fun KotlinLoggingLevel.logIfEnabled(
         marker: Marker?,
         msg: () -> Any?,
         t: Throwable?,
-        logFunction: (Any?) -> Unit
+        logFunction: (String, String) -> Unit
     ) {
         if (isLoggingEnabled()) {
-            logFunction(formatter.formatMessage(this, loggerName, marker, t, msg))
+            logFunction(loggerName, formatter.formatMessage(this, loggerName, marker, t, msg))
         }
     }