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#ifndef BOOST_MATH_COMMON_FACTOR_RT_HPP
#define BOOST_MATH_COMMON_FACTOR_RT_HPP
namespace boost {
namespace math {
// TODO: use binary GCD for unsigned integers ....
template < typename IntegerType >
IntegerType gcd( IntegerType a, IntegerType b )
{
const IntegerType zero = (IntegerType)0;
while ( true )
{
if ( a == zero )
return b;
b %= a;
if ( b == zero )
return a;
a %= b;
}
}
template < typename IntegerType >
IntegerType lcm( IntegerType a, IntegerType b )
{
const IntegerType t = gcd (a,b);
if (!t)return t;
return a / t * b;
}
}}
#endif
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