Remove repetition of metadata in log messages

libraries/logging/iot_logging_task_dynamic_buffers.c

@@ -153,10 +153,17 @@ void vLoggingPrintf( const char * pcFormat,
 
  if( pcPrintString != NULL )
  {
+ /* Variable to track when a stream of log message is completed. */
+ /* Note: A log message may be sent over multiple calls to vLoggingPrintf, thus, */
+ /* this variable tracks when the log message ends. */
+ static BaseType_t xEndOfMessage = pdTRUE;
+ size_t ulFormatStrLen = 0UL;
+
  /* There are a variable number of parameters. */
  va_start( args, pcFormat );
 
- if( strcmp( pcFormat, "\n" ) != 0 )
+ /* Add metadata of task name and tick time for a new log message. */
+ if( ( strcmp( pcFormat, "\n" ) != 0 ) && ( xEndOfMessage == pdTRUE ) )
  {
  #if ( configLOGGING_INCLUDE_TIME_AND_TASK_NAME == 1 )
  {
@@ -187,6 +194,19 @@ void vLoggingPrintf( const char * pcFormat,
  #endif /* if ( configLOGGING_INCLUDE_TIME_AND_TASK_NAME == 1 ) */
  }
 
+ ulFormatStrLen = strlen( pcFormat );
+
+ /* Look for new line character in message to detect if the log message has ended.
+ * This is done to ensure that the metadata is added only once per log message. */
+ if( ( ulFormatStrLen >= 2UL ) && ( strcmp( pcFormat + ulFormatStrLen - 2, "\r\n" ) == 0U ) )
+ {
+ xEndOfMessage = pdTRUE;
+ }
+ else
+ {
+ xEndOfMessage = pdFALSE;
+ }
+
  xLength2 = vsnprintf( pcPrintString + xLength, configLOGGING_MAX_MESSAGE_LENGTH - xLength, pcFormat, args );
 
  if( xLength2 < 0 )