From: Zooko O'Whielacronx <zooko@zooko.com>
Date: Thu, 1 Feb 2007 22:55:26 +0000 (-0700)
Subject: add mathutil.next_power_of_k() and mathutil.ave()
X-Git-Url: https://git.rkrishnan.org/?a=commitdiff_plain;h=1373789463aaa744413c2777551be9ce87cea7ba;p=tahoe-lafs%2Ftahoe-lafs.git

add mathutil.next_power_of_k() and mathutil.ave()
---

diff --git a/src/allmydata/util/mathutil.py b/src/allmydata/util/mathutil.py
index fa58ecc0..afcb3121 100644
--- a/src/allmydata/util/mathutil.py
+++ b/src/allmydata/util/mathutil.py
@@ -34,3 +34,18 @@ def pad_size(n, k):
 
 def is_power_of_k(n, k):
     return k**int(math.log(n, k) + 0.5) == n
+
+def next_power_of_k(n, k):
+    if n == 0:
+        x = 0
+    else:
+        x = int(math.log(n, k) + 0.5)
+    r = k**x
+    if k**x < n:
+        return k**(x+1)
+    else:
+        return k**x
+    
+def ave(l):
+    return sum(l) / len(l)
+