reactos/include/c++/stlport/stl/_limits.c

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/*
* Copyright (c) 1998,1999
* Silicon Graphics Computer Systems, Inc.
*
* Copyright (c) 1999
* Boris Fomitchev
*
* This material is provided "as is", with absolutely no warranty expressed
* or implied. Any use is at your own risk.
*
* Permission to use or copy this software for any purpose is hereby granted
* without fee, provided the above notices are retained on all copies.
* Permission to modify the code and to distribute modified code is granted,
* provided the above notices are retained, and a notice that the code was
* modified is included with the above copyright notice.
*
*/
#ifndef _STLP_LIMITS_C
#define _STLP_LIMITS_C
#ifndef _STLP_INTERNAL_LIMITS
# include <stl/_limits.h>
#endif
//==========================================================
// numeric_limits static members
//==========================================================
_STLP_BEGIN_NAMESPACE
_STLP_MOVE_TO_PRIV_NAMESPACE
#if !defined (_STLP_STATIC_CONST_INIT_BUG) && !defined (_STLP_NO_STATIC_CONST_DEFINITION)
# define __declare_numeric_base_member(__type, __mem) \
template <class __number> \
const __type _Numeric_limits_base<__number>:: __mem
__declare_numeric_base_member(bool, is_specialized);
__declare_numeric_base_member(int, digits);
__declare_numeric_base_member(int, digits10);
__declare_numeric_base_member(bool, is_signed);
__declare_numeric_base_member(bool, is_integer);
__declare_numeric_base_member(bool, is_exact);
__declare_numeric_base_member(int, radix);
__declare_numeric_base_member(int, min_exponent);
__declare_numeric_base_member(int, max_exponent);
__declare_numeric_base_member(int, min_exponent10);
__declare_numeric_base_member(int, max_exponent10);
__declare_numeric_base_member(bool, has_infinity);
__declare_numeric_base_member(bool, has_quiet_NaN);
__declare_numeric_base_member(bool, has_signaling_NaN);
__declare_numeric_base_member(float_denorm_style, has_denorm);
__declare_numeric_base_member(bool, has_denorm_loss);
__declare_numeric_base_member(bool, is_iec559);
__declare_numeric_base_member(bool, is_bounded);
__declare_numeric_base_member(bool, is_modulo);
__declare_numeric_base_member(bool, traps);
__declare_numeric_base_member(bool, tinyness_before);
__declare_numeric_base_member(float_round_style, round_style);
# undef __declare_numeric_base_member
# define __declare_integer_limits_member(__type, __mem) \
template <class _Int, _STLP_LIMITS_MIN_TYPE __imin, _STLP_LIMITS_MAX_TYPE __imax, int __idigits, bool __ismod> \
const __type _Integer_limits<_Int, __imin, __imax, __idigits, __ismod>:: __mem
__declare_integer_limits_member(bool, is_specialized);
__declare_integer_limits_member(int, digits);
__declare_integer_limits_member(int, digits10);
__declare_integer_limits_member(bool, is_signed);
__declare_integer_limits_member(bool, is_integer);
__declare_integer_limits_member(bool, is_exact);
__declare_integer_limits_member(int, radix);
__declare_integer_limits_member(bool, is_bounded);
__declare_integer_limits_member(bool, is_modulo);
# undef __declare_integer_limits_member
# if defined (__GNUC__) && (__GNUC__ != 2 || __GNUC_MINOR__ > 96) && (__GNUC__ != 3 || __GNUC_MINOR__ == 0) && (__GNUC__ <= 3)
_STLP_MOVE_TO_STD_NAMESPACE
# define __declare_numeric_limits_member(__integer) \
_STLP_TEMPLATE_NULL const int numeric_limits<__integer>::digits; \
_STLP_TEMPLATE_NULL const int numeric_limits<__integer>::digits10; \
_STLP_TEMPLATE_NULL const int numeric_limits<__integer>::radix; \
_STLP_TEMPLATE_NULL const bool numeric_limits<__integer>::is_specialized; \
_STLP_TEMPLATE_NULL const bool numeric_limits<__integer>::is_signed; \
_STLP_TEMPLATE_NULL const bool numeric_limits<__integer>::is_integer; \
_STLP_TEMPLATE_NULL const bool numeric_limits<__integer>::is_exact; \
_STLP_TEMPLATE_NULL const bool numeric_limits<__integer>::is_bounded; \
_STLP_TEMPLATE_NULL const bool numeric_limits<__integer>::is_modulo
__declare_numeric_limits_member(_STLP_LONG_LONG);
__declare_numeric_limits_member(unsigned _STLP_LONG_LONG);
# undef __declare_numeric_limits_member
_STLP_MOVE_TO_PRIV_NAMESPACE
# endif
# define __declare_float_limits_member(__type, __mem) \
template <class __number, \
int __Digits, int __Digits10, \
int __MinExp, int __MaxExp, \
int __MinExp10, int __MaxExp10, \
bool __IsIEC559, \
float_denorm_style __DenormStyle, \
float_round_style __RoundStyle> \
const __type _Floating_limits< __number, __Digits, __Digits10, \
__MinExp, __MaxExp, __MinExp10, __MaxExp10, \
__IsIEC559, __DenormStyle, __RoundStyle>::\
__mem
__declare_float_limits_member(bool, is_specialized);
__declare_float_limits_member(int, digits);
__declare_float_limits_member(int, digits10);
__declare_float_limits_member(bool, is_signed);
__declare_float_limits_member(int, radix);
__declare_float_limits_member(int, min_exponent);
__declare_float_limits_member(int, max_exponent);
__declare_float_limits_member(int, min_exponent10);
__declare_float_limits_member(int, max_exponent10);
__declare_float_limits_member(bool, has_infinity);
__declare_float_limits_member(bool, has_quiet_NaN);
__declare_float_limits_member(bool, has_signaling_NaN);
__declare_float_limits_member(float_denorm_style, has_denorm);
__declare_float_limits_member(bool, has_denorm_loss);
__declare_float_limits_member(bool, is_iec559);
__declare_float_limits_member(bool, is_bounded);
__declare_float_limits_member(bool, traps);
__declare_float_limits_member(bool, tinyness_before);
__declare_float_limits_member(float_round_style, round_style);
# undef __declare_float_limits_member
#endif
#if defined (_STLP_EXPOSE_GLOBALS_IMPLEMENTATION)
# if defined (__GNUC__) || defined (__BORLANDC__)
# define _STLP_ADDITIONAL_OPEN_BRACKET {
# define _STLP_ADDITIONAL_CLOSE_BRACKET }
# else
# define _STLP_ADDITIONAL_OPEN_BRACKET
# define _STLP_ADDITIONAL_CLOSE_BRACKET
# endif
/* The following code has been extracted from the boost libraries (www.boost.org) and
* adapted with the STLport portability macros. Advantage on previous technique is that
* computation of infinity and NaN values is only based on big/little endianess, compiler
* float, double or long double representation is taken into account thanks to the sizeof
* operator. */
template<class _Number, unsigned short _Word>
struct float_helper {
union _WordsNumber {
unsigned short _Words[8];
_Number _num;
};
static _Number get_word_higher() _STLP_NOTHROW {
_WordsNumber __tmp = { _STLP_ADDITIONAL_OPEN_BRACKET _Word, 0, 0, 0, 0, 0, 0, 0 _STLP_ADDITIONAL_CLOSE_BRACKET };
return __tmp._num;
}
static _Number get_word_lower() _STLP_NOTHROW {
_WordsNumber __tmp = { _STLP_ADDITIONAL_OPEN_BRACKET 0, 0, 0, 0, 0, 0, 0, 0 _STLP_ADDITIONAL_CLOSE_BRACKET };
__tmp._Words[(sizeof(_Number) >= 12 ? 10 : sizeof(_Number)) / sizeof(unsigned short) - 1] = _Word;
return __tmp._num;
}
static _Number get_from_last_word() _STLP_NOTHROW {
# if defined (_STLP_BIG_ENDIAN)
return get_word_higher();
# else /* _STLP_LITTLE_ENDIAN */
return get_word_lower();
# endif
}
static _Number get_from_first_word() _STLP_NOTHROW {
# if defined (_STLP_BIG_ENDIAN)
return get_word_lower();
# else /* _STLP_LITTLE_ENDIAN */
return get_word_higher();
# endif
}
};
# if !defined (_STLP_NO_LONG_DOUBLE) && !defined (_STLP_BIG_ENDIAN)
template<class _Number, unsigned short _Word1, unsigned short _Word2>
struct float_helper2 {
union _WordsNumber {
unsigned short _Words[8];
_Number _num;
};
//static _Number get_word_higher() _STLP_NOTHROW {
// _WordsNumber __tmp = { _STLP_ADDITIONAL_OPEN_BRACKET _Word1, _Word2, 0, 0, 0, 0, 0, 0 _STLP_ADDITIONAL_CLOSE_BRACKET };
// return __tmp._num;
//}
static _Number get_word_lower() _STLP_NOTHROW {
_WordsNumber __tmp = { _STLP_ADDITIONAL_OPEN_BRACKET 0, 0, 0, 0, 0, 0, 0, 0 _STLP_ADDITIONAL_CLOSE_BRACKET };
__tmp._Words[(sizeof(_Number) >= 12 ? 10 : sizeof(_Number)) / sizeof(unsigned short) - 2] = _Word1;
__tmp._Words[(sizeof(_Number) >= 12 ? 10 : sizeof(_Number)) / sizeof(unsigned short) - 1] = _Word2;
return __tmp._num;
}
static _Number get_from_last_word() _STLP_NOTHROW {
//# if defined (_STLP_BIG_ENDIAN)
// return get_word_higher();
//# else /* _STLP_LITTLE_ENDIAN */
return get_word_lower();
//# endif
}
};
# endif
/* Former values kept in case moving to boost code has introduce a regression on
* some platform. */
#if 0
# if defined (_STLP_BIG_ENDIAN)
# if defined (__OS400__)
# define _STLP_FLOAT_INF_REP { 0x7f80, 0 }
# define _STLP_FLOAT_QNAN_REP { 0xffc0, 0 }
# define _STLP_FLOAT_SNAN_REP { 0xff80, 0 }
# define _STLP_DOUBLE_INF_REP { 0x7ff0, 0, 0, 0 }
# define _STLP_DOUBLE_QNAN_REP { 0xfff8, 0, 0, 0 }
# define _STLP_DOUBLE_SNAN_REP { 0xfff0, 0, 0, 0 }
# define _STLP_LDOUBLE_INF_REP { 0x7ff0, 0, 0, 0, 0, 0, 0, 0 }
# define _STLP_LDOUBLE_QNAN_REP { 0xfff8, 0, 0, 0, 0, 0, 0, 0 }
# define _STLP_LDOUBLE_SNAN_REP { 0xfff0, 0, 0, 0, 0, 0, 0, 0 }
# else /* __OS400__ */
# define _STLP_FLOAT_INF_REP { 0x7f80, 0 }
# define _STLP_FLOAT_QNAN_REP { 0x7fc1, 0 }
# define _STLP_FLOAT_SNAN_REP { 0x7f81, 0 }
# define _STLP_DOUBLE_INF_REP { 0x7ff0, 0, 0, 0 }
# define _STLP_DOUBLE_QNAN_REP { 0x7ff9, 0, 0, 0 }
# define _STLP_DOUBLE_SNAN_REP { 0x7ff1, 0, 0, 0 }
# define _STLP_LDOUBLE_INF_REP { 0x7ff0, 0, 0, 0, 0, 0, 0, 0 }
# define _STLP_LDOUBLE_QNAN_REP { 0x7ff1, 0, 0, 0, 0, 0, 0, 0 }
# define _STLP_LDOUBLE_SNAN_REP { 0x7ff9, 0, 0, 0, 0, 0, 0, 0 }
# endif /* __OS400__ */
# else /* _STLP_LITTLE_ENDIAN */
# if defined(__DECCXX)
# define _STLP_FLOAT_INF_REP { 0, 0x7f80 }
# define _STLP_FLOAT_QNAN_REP { 0, 0xffc0 }
# define _STLP_FLOAT_SNAN_REP { 0x5555, 0x7f85 }
# define _STLP_DOUBLE_INF_REP { 0, 0, 0, 0x7ff0 }
# define _STLP_DOUBLE_QNAN_REP { 0, 0, 0, 0xfff8 }
# define _STLP_DOUBLE_SNAN_REP { 0x5555, 0x5555, 0x5555, 0x7ff5 }
# define _STLP_LDOUBLE_INF_REP { 0, 0, 0, 0, 0, 0, 0, 0x7fff }
# define _STLP_LDOUBLE_QNAN_REP { 0, 0, 0, 0, 0, 0, 0x8000, 0xffff }
# define _STLP_LDOUBLE_SNAN_REP { 0x5555, 0x5555, 0x5555, 0x5555, 0x5555, 0x5555, 0x5555, 0x7fff}
# else
# define _STLP_FLOAT_INF_REP { 0, 0x7f80 }
# define _STLP_FLOAT_QNAN_REP { 0, 0x7fc0 }
# define _STLP_FLOAT_SNAN_REP { 0, 0x7fa0 }
# define _STLP_DOUBLE_INF_REP { 0, 0, 0, 0x7ff0 }
# define _STLP_DOUBLE_QNAN_REP { 0, 0, 0, 0x7ff8 }
# define _STLP_DOUBLE_SNAN_REP { 0, 0, 0, 0x7ff4 }
# if defined (_STLP_MSVC) || defined (__ICL)
# define _STLP_LDOUBLE_INF_REP { 0, 0, 0, 0x7FF0, 0 }
# define _STLP_LDOUBLE_QNAN_REP { 0, 0, 0, 0xFFF8, 0 }
# define _STLP_LDOUBLE_SNAN_REP { 0, 0, 0, 0xFFF8, 0 }
# elif defined (__BORLANDC__)
# define _STLP_LDOUBLE_INF_REP { 0, 0, 0, 0x8000, 0x7fff }
# define _STLP_LDOUBLE_QNAN_REP { 0, 0, 0, 0xc000, 0x7fff }
# define _STLP_LDOUBLE_SNAN_REP { 0, 0, 0, 0xa000, 0x7fff }
# else
# define _STLP_LDOUBLE_INF_REP { 0, 0, 0, 0x8000, 0x7fff, 0 }
# define _STLP_LDOUBLE_QNAN_REP { 0, 0, 0, 0xa000, 0x7fff, 0 }
# define _STLP_LDOUBLE_SNAN_REP { 0, 0, 0, 0xc000, 0x7fff, 0 }
# endif
# endif
# endif
union _F_rep {
unsigned short rep[2];
float val;
};
union _D_rep {
unsigned short rep[4];
double val;
};
# ifndef _STLP_NO_LONG_DOUBLE
union _LD_rep {
unsigned short rep[8];
long double val;
};
# endif
#endif
template <class __dummy>
float _STLP_CALL _LimG<__dummy>::get_F_inf() {
typedef float_helper<float, 0x7f80u> _FloatHelper;
return _FloatHelper::get_from_last_word();
}
template <class __dummy>
float _STLP_CALL _LimG<__dummy>::get_F_qNaN() {
typedef float_helper<float, 0x7f81u> _FloatHelper;
return _FloatHelper::get_from_last_word();
}
template <class __dummy>
float _STLP_CALL _LimG<__dummy>::get_F_sNaN() {
typedef float_helper<float, 0x7fc1u> _FloatHelper;
return _FloatHelper::get_from_last_word();
}
template <class __dummy>
float _STLP_CALL _LimG<__dummy>::get_F_denormMin() {
typedef float_helper<float, 0x0001u> _FloatHelper;
return _FloatHelper::get_from_first_word();
}
template <int __use_double_limits>
class _NumericLimitsAccess;
_STLP_TEMPLATE_NULL
class _NumericLimitsAccess<1> {
public:
static double get_inf() {
typedef float_helper<double, 0x7ff0u> _FloatHelper;
return _FloatHelper::get_from_last_word();
}
static double get_qNaN() {
typedef float_helper<double, 0x7ff1u> _FloatHelper;
return _FloatHelper::get_from_last_word();
}
static double get_sNaN() {
typedef float_helper<double, 0x7ff9u> _FloatHelper;
return _FloatHelper::get_from_last_word();
}
};
template <class __dummy>
double _STLP_CALL _LimG<__dummy>::get_D_inf()
{ return _NumericLimitsAccess<1>::get_inf(); }
template <class __dummy>
double _STLP_CALL _LimG<__dummy>::get_D_qNaN()
{ return _NumericLimitsAccess<1>::get_qNaN(); }
template <class __dummy>
double _STLP_CALL _LimG<__dummy>::get_D_sNaN()
{ return _NumericLimitsAccess<1>::get_sNaN(); }
template <class __dummy>
double _STLP_CALL _LimG<__dummy>::get_D_denormMin() {
typedef float_helper<double, 0x0001u> _FloatHelper;
return _FloatHelper::get_from_first_word();
}
# if !defined (_STLP_NO_LONG_DOUBLE)
_STLP_TEMPLATE_NULL
class _NumericLimitsAccess<0> {
public:
static long double get_inf() {
# if defined (_STLP_BIG_ENDIAN)
typedef float_helper<long double, 0x7ff0u> _FloatHelper;
# else
typedef float_helper2<long double, 0x8000u, 0x7fffu> _FloatHelper;
# endif
return _FloatHelper::get_from_last_word();
}
static long double get_qNaN() {
# if defined (_STLP_BIG_ENDIAN)
typedef float_helper<long double, 0x7ff1u> _FloatHelper;
# else
typedef float_helper2<long double, 0xc000u, 0x7fffu> _FloatHelper;
# endif
return _FloatHelper::get_from_last_word();
}
static long double get_sNaN() {
# if defined (_STLP_BIG_ENDIAN)
typedef float_helper<long double, 0x7ff9u> _FloatHelper;
# else
typedef float_helper2<long double, 0x9000u, 0x7fffu> _FloatHelper;
# endif
return _FloatHelper::get_from_last_word();
}
};
template <class __dummy>
long double _STLP_CALL _LimG<__dummy>::get_LD_inf() {
const int __use_double_limits = sizeof(double) == sizeof(long double) ? 1 : 0;
return _NumericLimitsAccess<__use_double_limits>::get_inf();
}
template <class __dummy>
long double _STLP_CALL _LimG<__dummy>::get_LD_qNaN() {
const int __use_double_limits = sizeof(double) == sizeof(long double) ? 1 : 0;
return _NumericLimitsAccess<__use_double_limits>::get_qNaN();
}
template <class __dummy>
long double _STLP_CALL _LimG<__dummy>::get_LD_sNaN() {
const int __use_double_limits = sizeof(double) == sizeof(long double) ? 1 : 0;
return _NumericLimitsAccess<__use_double_limits>::get_sNaN();
}
template <class __dummy>
long double _STLP_CALL _LimG<__dummy>::get_LD_denormMin() {
typedef float_helper<long double, 0x0001u> _FloatHelper;
return _FloatHelper::get_from_first_word();
}
# endif
#endif /* _STLP_EXPOSE_GLOBALS_IMPLEMENTATION */
#undef _STLP_LIMITS_MIN_TYPE
#undef _STLP_LIMITS_MAX_TYPE
_STLP_MOVE_TO_STD_NAMESPACE
_STLP_END_NAMESPACE
#endif /* _STLP_LIMITS_C_INCLUDED */