store multiple scalings per signal (LDF-import) (#823)

Author: ebroecker

src/canmatrix/canmatrix.py

@@ -191,7 +191,7 @@ class Signal(object):
 
     cycle_time = attr.ib(default=0)  # type: int
     initial_value = attr.ib(converter=float_factory, default=float_factory(0.0))  # type: canmatrix.types.PhysicalValue
-
+    scale_ranges = attr.ib(factory=list)
     min = attr.ib(
         converter=lambda value, float_factory=float_factory: (
             float_factory(value)

src/canmatrix/formats/ldf.py

@@ -25,6 +25,12 @@ def load(f, **options):  # type: (typing.IO, **typing.Any) -> canmatrix.CanMatri
                     if isinstance(converter, ldfparser.encoding.LogicalValue):
                         cm_signal.add_values(converter.phy_value, converter.info)
                     if isinstance(converter, ldfparser.encoding.PhysicalValue):
+                        cm_signal.scale_ranges.append({
+                            "min" : converter.phy_min, 
+                            "max" : converter.phy_max,
+                            "factor" : converter.scale,
+                            "offset" : converter.offset,
+                            "unit" : converter.unit})
                         cm_signal.offset = converter.offset
                         cm_signal.factor = converter.scale
                         cm_signal.unit = converter.unit