1 files changed, 60 insertions, 0 deletions
diff --git a/devlib/derived/__init__.py b/devlib/derived/__init__.py
new file mode 100644
index 0000000..24ac060
--- /dev/null
+++ b/devlib/derived/__init__.py
@@ -0,0 +1,60 @@
+#    Copyright 2015 ARM Limited
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from devlib.instrument import MeasurementType, MEASUREMENT_TYPES
+
+
+class DerivedMetric(object):
+
+    __slots__ = ['name', 'value', 'measurement_type']
+
+    @property
+    def units(self):
+        return self.measurement_type.units
+
+    def __init__(self, name, value, measurement_type):
+        self.name = name
+        self.value = value
+        if isinstance(measurement_type, MeasurementType):
+            self.measurement_type = measurement_type
+        else:
+            try:
+                self.measurement_type = MEASUREMENT_TYPES[measurement_type]
+            except KeyError:
+                msg = 'Unknown measurement type:  {}'
+                raise ValueError(msg.format(measurement_type))
+
+    def __cmp__(self, other):
+        if hasattr(other, 'value'):
+            return cmp(self.value, other.value)
+        else:
+            return cmp(self.value, other)
+
+    def __str__(self):
+        if self.units:
+            return '{}: {} {}'.format(self.name, self.value, self.units)
+        else:
+            return '{}: {}'.format(self.name, self.value)
+
+    __repr__ = __str__
+
+
+class DerivedMeasurements(object):
+
+    def process(self, measurements_csv):
+        return []
+
+    def process_raw(self, *args):
+        return []