math.h

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#ifndef STORM_UTILITY_MATH_H_
#define STORM_UTILITY_MATH_H_
 
#include <cmath>
 
#include "storm/utility/OsDetection.h"
#include "storm/utility/macros.h"
 
namespace storm {
namespace utility {
namespace math {
// We provide this method explicitly, because MSVC does not offer it (non-C99 compliant).
template<typename ValueType>
static inline double log2(ValueType number) {
#ifndef WINDOWS
    return std::log2(number);
#else
    return std::log(number) / std::log(2);
#endif
}
 
inline uint64_t uint64_log2(uint64_t n) {
    STORM_LOG_ASSERT(n != 0, "N is 0.");
#define S(k)                       \
    if (n >= (UINT64_C(1) << k)) { \
        i += k;                    \
        n >>= k;                   \
    }
    uint64_t i = 0;
    S(32);
    S(16);
    S(8);
    S(4);
    S(2);
    S(1);
    return i;
#undef S
}
}  // namespace math
}  // namespace utility
}  // namespace storm
 
#endif /* STORM_UTILITY_MATH_H_ */