2 files changed, 37 insertions, 0 deletions

diff --git a/pyecsca/misc/cfg.py b/pyecsca/misc/cfg.py
index ee9c95d..f73eea9 100644
--- a/pyecsca/misc/cfg.py
+++ b/pyecsca/misc/cfg.py
@@ -121,6 +121,12 @@ class ECConfig:
             raise ValueError("Bad Mod implementaiton, can be one of 'python', 'gmp' or 'symbolic'.")
         self._mod_implementation = value
 
+@public
+class LoggingConfig:
+    """Logging configuration."""
+
+    enabled: bool = True
+    """Whether logging is enabled."""
 
 @public
 class Config:
@@ -128,9 +134,12 @@ class Config:
 
     ec: ECConfig
     """Configuration for the :py:mod:`pyecsca.ec` package."""
+    log: LoggingConfig
+    """Logging configuration."""
 
     def __init__(self):
         self.ec = ECConfig()
+        self.log = LoggingConfig()
 
 
 _config: ContextVar[Config] = ContextVar("config", default=Config())
diff --git a/pyecsca/misc/utils.py b/pyecsca/misc/utils.py
index 1e9e9a0..010bbd2 100644
--- a/pyecsca/misc/utils.py
+++ b/pyecsca/misc/utils.py
@@ -1,6 +1,9 @@
 """Just some utilities I promise."""
+import sys
 from ast import parse
 
+from pyecsca.misc.cfg import getconfig
+
 
 def pexec(s):
     return parse(s, mode="exec")
@@ -8,3 +11,28 @@ def pexec(s):
 
 def peval(s):
     return parse(s, mode="eval")
+
+
+def in_notebook() -> bool:
+    """Test whether we are executing in Jupyter notebook."""
+    try:
+        from IPython import get_ipython
+        if 'IPKernelApp' not in get_ipython().config:  # pragma: no cover
+            return False
+    except ImportError:
+        return False
+    except AttributeError:
+        return False
+    return True
+
+
+def log(*args, **kwargs):
+    """Log a message."""
+    if in_notebook() and getconfig().log.enabled:
+        print(*args, **kwargs)
+
+
+def warn(*args, **kwargs):
+    """Log a message."""
+    if in_notebook() and getconfig().log.enabled:
+        print(*args, **kwargs, file=sys.stderr)