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Need to take abs of return value in short-circuit gcd code.

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jzmaddock
2017-04-24 19:19:48 +01:00
parent 52ce75ed65
commit 4991d82385
1 changed files with 2 additions and 2 deletions
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4
include/boost/integer/common_factor_rt.hpp
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@@ -447,9 +447,9 @@ template <typename Integer>
inline BOOST_CXX14_CONSTEXPR Integer gcd(Integer const &a, Integer const &b) BOOST_GCD_NOEXCEPT(Integer)
{
if(a == (std::numeric_limits<Integer>::min)())
return a == static_cast<Integer>(0) ? b : gcd(static_cast<Integer>(a % b), b);
return a == static_cast<Integer>(0) ? gcd_detail::gcd_traits<Integer>::abs(b) : gcd(static_cast<Integer>(a % b), b);
else if (b == (std::numeric_limits<Integer>::min)())
return b == static_cast<Integer>(0) ? a : gcd(a, static_cast<Integer>(b % a));
return b == static_cast<Integer>(0) ? gcd_detail::gcd_traits<Integer>::abs(a) : gcd(a, static_cast<Integer>(b % a));
return gcd_detail::optimal_gcd_select(static_cast<Integer>(gcd_detail::gcd_traits<Integer>::abs(a)), static_cast<Integer>(gcd_detail::gcd_traits<Integer>::abs(b)));
}