[pypy-svn] r68200 - pypy/trunk/pypy/rlib

[cfbolz at codespeak.net]

Author: cfbolz
Date: Tue Oct  6 13:28:15 2009
New Revision: 68200

Modified:
   pypy/trunk/pypy/rlib/rbigint.py
Log:
make the digit list of longs non-resizable


Modified: pypy/trunk/pypy/rlib/rbigint.py
==============================================================================
--- pypy/trunk/pypy/rlib/rbigint.py	(original)
+++ pypy/trunk/pypy/rlib/rbigint.py	Tue Oct  6 13:28:15 2009
@@ -1,5 +1,6 @@
 from pypy.rlib.rarithmetic import LONG_BIT, intmask, r_uint, r_ulonglong
 from pypy.rlib.rarithmetic import ovfcheck, r_longlong, widen
+from pypy.rlib.debug import make_sure_not_resized
 
 import math, sys
 
@@ -52,6 +53,7 @@
     def __init__(self, digits=None, sign=0):
         if digits is None or len(digits) == 0:
             digits = [0]
+        make_sure_not_resized(digits)
         self.digits = digits
         self.sign = sign
 
@@ -585,7 +587,7 @@
         digits.append(mask_digit(l))
         l = l >> SHIFT
         if not l:
-            return digits
+            return digits[:] # to make it non-resizable
 digits_from_nonneg_long._annspecialcase_ = "specialize:argtype(0)"
 
 def digits_for_most_neg_long(l):
@@ -601,7 +603,7 @@
     l = -intmask(l)
     assert l >= 0
     digits.append(l)
-    return digits
+    return digits[:] # to make it non-resizable
 digits_for_most_neg_long._annspecialcase_ = "specialize:argtype(0)"
 
 def args_from_rarith_int1(x):