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ppm-guest pushed a commit to annotated tag v0.35
in repository libmath-prime-util-perl.
commit 1b6c179b1e558c1c6e9b3731665c22050cfabeb0
Author: Dana Jacobsen <d...@acm.org>
Date: Fri Dec 6 18:15:25 2013 -0800
Protect against overflow
---
lehmer.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lehmer.c b/lehmer.c
index 4e6488f..169d931 100644
--- a/lehmer.c
+++ b/lehmer.c
@@ -280,7 +280,7 @@ static UV bs_prime_count(uint32_t n, uint32_t const* const
primes, uint32_t last
if (j > (n>>4)) j = n>>4;
}
while (i < j) {
- UV mid = (i+j)/2;
+ UV mid = i + (j-i)/2;
if (primes[mid] <= n) i = mid+1;
else j = mid;
}
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