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author | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-07-13 15:19:48 +0000 |
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committer | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-07-13 15:19:48 +0000 |
commit | b9eeeac5c87591ca43fdb6aaafb521a84d7d3800 (patch) | |
tree | 4bec4a0c5632fb287658ccdf390a103f4603337e | |
parent | 74c6e2af741cc383401a7b1d04336168f1fc5fae (diff) | |
download | ruby-b9eeeac5c87591ca43fdb6aaafb521a84d7d3800.tar.gz |
* bignum.c (big_shift): Avoid signed integer overflow.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41959 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
-rw-r--r-- | ChangeLog | 4 | ||||
-rw-r--r-- | bignum.c | 2 |
2 files changed, 5 insertions, 1 deletions
@@ -1,3 +1,7 @@ +Sun Jul 14 00:17:42 2013 Tanaka Akira <akr@fsij.org> + + * bignum.c (big_shift): Avoid signed integer overflow. + Sun Jul 14 00:14:15 2013 Tanaka Akira <akr@fsij.org> * bignum.c (bary_mul_precheck): Use bary_small_lshift or @@ -5283,7 +5283,7 @@ static VALUE big_shift(VALUE x, long n) { if (n < 0) - return big_lshift(x, (unsigned long)-n); + return big_lshift(x, 1+(unsigned long)(-(n+1))); else if (n > 0) return big_rshift(x, (unsigned long)n); return x; |