1 files changed, 46 insertions, 0 deletions
diff --git a/scripts/mbedtls_dev/logging_util.py b/scripts/mbedtls_dev/logging_util.py
new file mode 100644
index 00000000000..ddd7c7fd672
--- /dev/null
+++ b/scripts/mbedtls_dev/logging_util.py
@@ -0,0 +1,46 @@
+"""Auxiliary functions used for logging module.
+"""
+
+# Copyright The Mbed TLS Contributors
+# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+#
+
+import logging
+import sys
+
+def configure_logger(
+        logger: logging.Logger,
+        log_format="[%(levelname)s]: %(message)s",
+        split_level=logging.WARNING
+    ) -> None:
+    """
+    Configure the logging.Logger instance so that:
+        - Format is set to any log_format.
+            Default: "[%(levelname)s]: %(message)s"
+        - loglevel >= split_level are printed to stderr.
+        - loglevel <  split_level are printed to stdout.
+            Default: logging.WARNING
+    """
+    class MaxLevelFilter(logging.Filter):
+        # pylint: disable=too-few-public-methods
+        def __init__(self, max_level, name=''):
+            super().__init__(name)
+            self.max_level = max_level
+
+        def filter(self, record: logging.LogRecord) -> bool:
+            return record.levelno <= self.max_level
+
+    log_formatter = logging.Formatter(log_format)
+
+    # set loglevel >= split_level to be printed to stderr
+    stderr_hdlr = logging.StreamHandler(sys.stderr)
+    stderr_hdlr.setLevel(split_level)
+    stderr_hdlr.setFormatter(log_formatter)
+
+    # set loglevel < split_level to be printed to stdout
+    stdout_hdlr = logging.StreamHandler(sys.stdout)
+    stdout_hdlr.addFilter(MaxLevelFilter(split_level - 1))
+    stdout_hdlr.setFormatter(log_formatter)
+
+    logger.addHandler(stderr_hdlr)
+    logger.addHandler(stdout_hdlr)