1 files changed, 63 insertions, 0 deletions
diff --git a/Tools/c-analyzer/c_common/logging.py b/Tools/c-analyzer/c_common/logging.py
new file mode 100644
index 0000000000..12398f7e38
--- /dev/null
+++ b/Tools/c-analyzer/c_common/logging.py
@@ -0,0 +1,63 @@
+import logging
+import sys
+
+
+VERBOSITY = 3
+
+
+# The root logger for the whole top-level package:
+_logger = logging.getLogger(__name__.rpartition('.')[0])
+
+
+def configure_logger(logger, verbosity=VERBOSITY, *,
+                     logfile=None,
+                     maxlevel=logging.CRITICAL,
+                     ):
+    level = max(1,  # 0 disables it, so we use the next lowest.
+                min(maxlevel,
+                    maxlevel - verbosity * 10))
+    logger.setLevel(level)
+    #logger.propagate = False
+
+    if not logger.handlers:
+        if logfile:
+            handler = logging.FileHandler(logfile)
+        else:
+            handler = logging.StreamHandler(sys.stdout)
+        handler.setLevel(level)
+        #handler.setFormatter(logging.Formatter())
+        logger.addHandler(handler)
+
+    # In case the provided logger is in a sub-package...
+    if logger is not _logger:
+        configure_logger(
+            _logger,
+            verbosity,
+            logfile=logfile,
+            maxlevel=maxlevel,
+        )
+
+
+def hide_emit_errors():
+    """Ignore errors while emitting log entries.
+
+    Rather than printing a message desribing the error, we show nothing.
+    """
+    # For now we simply ignore all exceptions.  If we wanted to ignore
+    # specific ones (e.g. BrokenPipeError) then we would need to use
+    # a Handler subclass with a custom handleError() method.
+    orig = logging.raiseExceptions
+    logging.raiseExceptions = False
+    def restore():
+        logging.raiseExceptions = orig
+    return restore
+
+
+class Printer:
+    def __init__(self, verbosity=VERBOSITY):
+        self.verbosity = verbosity
+
+    def info(self, *args, **kwargs):
+        if self.verbosity < 3:
+            return
+        print(*args, **kwargs)