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