1 files changed, 59 insertions, 0 deletions
diff --git a/tests/bugs/distribute/overlap.py b/tests/bugs/distribute/overlap.py
new file mode 100755
index 00000000000..2813979787b
--- /dev/null
+++ b/tests/bugs/distribute/overlap.py
@@ -0,0 +1,59 @@
+
+from __future__ import print_function
+import sys
+
+def calculate_one (ov, nv):
+    old_start = int(ov[18:26], 16)
+    old_end = int(ov[26:34], 16)
+    new_start = int(nv[18:26], 16)
+    new_end = int(nv[26:34], 16)
+    if (new_end < old_start) or (new_start > old_end):
+        #print '%s, %s -> ZERO' % (ov, nv)
+        return 0
+    all_start = max(old_start, new_start)
+    all_end = min(old_end, new_end)
+    #print '%s, %s -> %08x' % (ov, nv, all_end - all_start + 1)
+    return all_end - all_start + 1
+
+def calculate_all (values):
+    total = 0
+    nv_index = len(values) // 2
+    for old_val in values[:nv_index]:
+        new_val = values[nv_index]
+        nv_index += 1
+        total += calculate_one(old_val, new_val)
+    return total
+
+"""
+test1_vals = [
+    '0x0000000000000000000000003fffffff',   # first quarter
+    '0x0000000000000000400000007fffffff',   # second quarter
+    '0x000000000000000080000000ffffffff',   # second half
+    '0x00000000000000000000000055555554',   # first third
+    '0x000000000000000055555555aaaaaaa9',   # second third
+    '0x0000000000000000aaaaaaaaffffffff',   # last third
+]
+
+test2_vals = [
+    '0x0000000000000000000000003fffffff',   # first quarter
+    '0x0000000000000000400000007fffffff',   # second quarter
+    '0x000000000000000080000000ffffffff',   # second half
+    '0x00000000000000000000000055555554',   # first third
+    # Next two are (incorrectly) swapped.
+    '0x0000000000000000aaaaaaaaffffffff',   # last third
+    '0x000000000000000055555555aaaaaaa9',   # second third
+]
+
+print '%08x' % calculate_one(test1_vals[0], test1_vals[3])
+print '%08x' % calculate_one(test1_vals[1], test1_vals[4])
+print '%08x' % calculate_one(test1_vals[2], test1_vals[5])
+print '= %08x' % calculate_all(test1_vals)
+print '%08x' % calculate_one(test2_vals[0], test2_vals[3])
+print '%08x' % calculate_one(test2_vals[1], test2_vals[4])
+print '%08x' % calculate_one(test2_vals[2], test2_vals[5])
+print '= %08x' % calculate_all(test2_vals)
+"""
+
+if __name__ == '__main__':
+    # Return decimal so bash can reason about it.
+    print('%d' % calculate_all(sys.argv[1:]))