http://hg.viff.dk/viff/rev/b44882c6d4f6
changeset: 1180:b44882c6d4f6
user: Marcel Keller <[email protected]>
date: Wed May 13 16:38:16 2009 +0200
summary: Reduce number of isinstance() calls.
diffstat:
1 file changed, 17 insertions(+), 6 deletions(-)
viff/field.py | 23 +++++++++++++++++------
diffs (54 lines):
diff -r cbc39e56b402 -r b44882c6d4f6 viff/field.py
--- a/viff/field.py Wed May 13 15:32:00 2009 +0200
+++ b/viff/field.py Wed May 13 16:38:16 2009 +0200
@@ -168,16 +168,21 @@
other = other.value
return GF256(self.value ^ other)
- #: Add this and another GF256 element (reflected argument version).
- __radd__ = __add__
+ def __radd__(self, other):
+ """Add this and another number (reflected argument version).
+ other is not Share, otherwise Share.__add__() would have been
+ called, and other is not a GF256, otherwise GF256.__add__()
+ would have been called."""
+ return GF256(self.value ^ other)
+
#: Subtract this and another GF256 element.
#:
#: Addition is its own inverse in GF(2^8) and so this is the same
#: as `__add__`.
__sub__ = __add__
#: Subtract this and another GF256 element (reflected argument version).
- __rsub__ = __sub__
+ __rsub__ = __radd__
#: Exclusive-or.
#:
@@ -185,7 +190,7 @@
__xor__ = __add__
#: Exclusive-or (reflected argument version).
- __rxor__ = __xor__
+ __rxor__ = __radd__
def __mul__(self, other):
"""Multiply this and another GF256.
@@ -204,8 +209,14 @@
return _mul_table[(self.value, other)]
- #: Multiply this and another GF256 element (reflected argument version).
- __rmul__ = __mul__
+ def __rmul__(self, other):
+ """Multiply this and another number (reflected argument
+ version).
+
+ other is not Share, otherwise Share.__mul__() would have been
+ called, and other is not a GF256, otherwise GF256.__mul__()
+ would have been called."""
+ return _mul_table[(self.value, other)]
def __pow__(self, exponent):
"""Exponentiation."""
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