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-rw-r--r--src/lib/netlist/plib/ptypes.h82
1 files changed, 58 insertions, 24 deletions
diff --git a/src/lib/netlist/plib/ptypes.h b/src/lib/netlist/plib/ptypes.h
index a3b11b65e74..6b4a4af2f75 100644
--- a/src/lib/netlist/plib/ptypes.h
+++ b/src/lib/netlist/plib/ptypes.h
@@ -81,38 +81,72 @@ namespace plib
template<typename... Ts>
inline void unused_var(Ts&&...) {}
+ //============================================================
+ // is_pow2
+ //============================================================
+ template <typename T>
+ constexpr bool is_pow2(T v) noexcept
+ {
+ static_assert(is_integral<T>::value, "is_pow2 needs integer arguments");
+ return !(v & (v-1));
+ }
//============================================================
- // penum - strongly typed enumeration
+ // abs, lcd, gcm
//============================================================
- struct penum_base
+ template<typename T>
+ constexpr
+ typename std::enable_if<std::is_integral<T>::value && std::is_signed<T>::value, T>::type
+ abs(T v)
{
- protected:
- static int from_string_int(const char *str, const char *x);
- static std::string nthstr(int n, const char *str);
- };
+ return v < 0 ? -v : v;
+ }
-} // namespace plib
+ template<typename T>
+ constexpr
+ typename std::enable_if<std::is_integral<T>::value && std::is_unsigned<T>::value, T>::type
+ abs(T v)
+ {
+ return v;
+ }
-#define P_ENUM(ename, ...) \
- struct ename : public plib::penum_base { \
- enum E { __VA_ARGS__ }; \
- ename (E v) : m_v(v) { } \
- bool set_from_string (const std::string &s) { \
- static char const *const strings = # __VA_ARGS__; \
- int f = from_string_int(strings, s.c_str()); \
- if (f>=0) { m_v = static_cast<E>(f); return true; } else { return false; } \
- } \
- operator E() const {return m_v;} \
- bool operator==(const ename &rhs) const {return m_v == rhs.m_v;} \
- bool operator==(const E &rhs) const {return m_v == rhs;} \
- std::string name() const { \
- static char const *const strings = # __VA_ARGS__; \
- return nthstr(static_cast<int>(m_v), strings); \
- } \
- private: E m_v; };
+ template<typename M, typename N>
+ constexpr typename std::common_type<M, N>::type
+ gcd(M m, N n)
+ {
+ static_assert(std::is_integral<M>::value, "gcd: M must be an integer");
+ static_assert(std::is_integral<N>::value, "gcd: N must be an integer");
+
+ return m == 0 ? plib::abs(n)
+ : n == 0 ? plib::abs(m)
+ : gcd(n, m % n);
+ }
+
+ template<typename M, typename N>
+ constexpr typename std::common_type<M, N>::type
+ lcm(M m, N n)
+ {
+ static_assert(std::is_integral<M>::value, "lcm: M must be an integer");
+ static_assert(std::is_integral<N>::value, "lcm: N must be an integer");
+
+ return (m != 0 && n != 0) ? (plib::abs(m) / gcd(m, n)) * plib::abs(n) : 0;
+ }
+
+} // namespace plib
+//============================================================
+// Define a "has member" trait.
+//============================================================
+
+#define PDEFINE_HAS_MEMBER(name, member) \
+ template <typename T> class name \
+ { \
+ template <typename U> static long test(decltype(&U:: member)); \
+ template <typename U> static char test(...); \
+ public: \
+ static constexpr const bool value = sizeof(test<T>(nullptr)) == sizeof(long); \
+ }
#endif /* PTYPES_H_ */