Interval: add .length computation

2 files changed, 12 insertions, 0 deletions

diff --git a/miasm2/core/interval.py b/miasm2/core/interval.py
index 66445674..019764d4 100644
--- a/miasm2/core/interval.py
+++ b/miasm2/core/interval.py
@@ -244,3 +244,11 @@ class interval(object):
 
         if dry_run is False:
             img.show()
+
+    @property
+    def length(self):
+        """
+        Return the cumulated length of intervals
+        """
+        # Do not use __len__ because we may return a value > 32 bits
+        return sum((stop - start + 1) for start, stop in self.intervals)
diff --git a/test/core/interval.py b/test/core/interval.py
index ab18e567..97d45a39 100755
--- a/test/core/interval.py
+++ b/test/core/interval.py
@@ -90,6 +90,10 @@ assert(i14 & i15 == i14)
 assert(i15 & i14 == i14)
 assert(i14 & i16 == interval([(3, 5), (7, 8)]))
 
+assert(i5.length == 5)
+assert(i6.length == 7)
+assert((i1 - i1).length == 0)
+
 x1 = [(7, 87), (76, 143), (94, 129), (79, 89), (46, 100)]
 assert(interval(x1) == interval([(7, 143)]))
 x2 = [(11, 16), (35, 74), (18, 114), (91, 188), (3, 75)]