diff options
Diffstat (limited to 'utils/nan.h')
-rw-r--r-- | utils/nan.h | 42 |
1 files changed, 0 insertions, 42 deletions
diff --git a/utils/nan.h b/utils/nan.h deleted file mode 100644 index 257364d5..00000000 --- a/utils/nan.h +++ /dev/null @@ -1,42 +0,0 @@ -#ifndef NAN_H -#define NAN_H -//TODO: switch to C99 isnan isfinite isinf etc. (faster) - -#include <limits> - -template <bool> struct nan_static_assert; -template <> struct nan_static_assert<true> { }; - -// is_iec559 i.e. only IEEE 754 float has x != x <=> x is nan -template<typename T> -inline bool is_nan(T x) { -// static_cast<void>(sizeof(nan_static_assert<std::numeric_limits<T>::has_quiet_NaN>)); - return std::numeric_limits<T>::has_quiet_NaN && (x != x); -} - -template <typename T> -inline bool is_inf(T x) { -// static_cast<void>(sizeof(nan_static_assert<std::numeric_limits<T>::has_infinity>)); - return x == std::numeric_limits<T>::infinity() || x == -std::numeric_limits<T>::infinity(); -} - -template <typename T> -inline bool is_pos_inf(T x) { -// static_cast<void>(sizeof(nan_static_assert<std::numeric_limits<T>::has_infinity>)); - return x == std::numeric_limits<T>::infinity(); -} - -template <typename T> -inline bool is_neg_inf(T x) { -// static_cast<void>(sizeof(nan_static_assert<std::numeric_limits<T>::has_infinity>)); - return x == -std::numeric_limits<T>::infinity(); -} - -//c99 isfinite macro shoudl be much faster -template <typename T> -inline bool is_finite(T x) { - return !is_nan(x) && !is_inf(x); -} - - -#endif |