author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 11 Jun 2010 15:26:22 +0300 | |
changeset 34 | 5fae379060a7 |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (c) 1997 |
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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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|
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/* NOTE: This may be not portable code. Parts of numeric_limits<> are |
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* inherently machine-dependent. At present this file is suitable |
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* for the MIPS, SPARC, Alpha and ia32 architectures. |
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*/ |
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|
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#ifndef _STLP_INTERNAL_LIMITS |
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#define _STLP_INTERNAL_LIMITS |
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|
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#ifndef _STLP_CLIMITS |
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# include <climits> |
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#endif |
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#ifndef _STLP_CFLOAT |
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# include <cfloat> |
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#endif |
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#if defined (_STLP_HAS_WCHAR_T) && !defined (_STLP_INTERNAL_CWCHAR) |
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# include <stl/_cwchar.h> |
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#endif |
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_STLP_BEGIN_NAMESPACE |
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enum float_round_style { |
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round_indeterminate = -1, |
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round_toward_zero = 0, |
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round_to_nearest = 1, |
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round_toward_infinity = 2, |
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round_toward_neg_infinity = 3 |
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}; |
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enum float_denorm_style { |
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denorm_indeterminate = -1, |
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denorm_absent = 0, |
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denorm_present = 1 |
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}; |
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_STLP_MOVE_TO_PRIV_NAMESPACE |
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// Base class for all specializations of numeric_limits. |
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template <class __number> |
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class _Numeric_limits_base { |
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public: |
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static __number (_STLP_CALL min)() _STLP_NOTHROW { return __number(); } |
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static __number (_STLP_CALL max)() _STLP_NOTHROW { return __number(); } |
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#if defined ( _STLP_STATIC_CONST_INIT_BUG) |
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enum { |
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#else |
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static const int |
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#endif |
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digits = 0, |
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digits10 = 0, |
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radix = 0, |
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min_exponent = 0, |
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min_exponent10 = 0, |
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max_exponent = 0, |
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max_exponent10 = 0 |
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#if defined ( _STLP_STATIC_CONST_INIT_BUG) |
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, |
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has_denorm = denorm_absent, |
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round_style = round_toward_zero, |
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#else |
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; |
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static const float_denorm_style has_denorm = denorm_absent; |
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static const float_round_style round_style = round_toward_zero; |
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static const bool |
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#endif |
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is_specialized = false, |
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is_signed = false, |
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is_integer = false, |
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is_exact = false, |
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has_infinity = false, |
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has_quiet_NaN = false, |
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has_signaling_NaN = false, |
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has_denorm_loss = false, |
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is_iec559 = false, |
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is_bounded = false, |
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is_modulo = false, |
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traps = false, |
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tinyness_before = false |
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#if defined ( _STLP_STATIC_CONST_INIT_BUG) |
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} |
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#endif |
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; |
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static __number _STLP_CALL epsilon() _STLP_NOTHROW { return __number(); } |
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static __number _STLP_CALL round_error() _STLP_NOTHROW { return __number(); } |
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static __number _STLP_CALL infinity() _STLP_NOTHROW { return __number(); } |
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static __number _STLP_CALL quiet_NaN() _STLP_NOTHROW { return __number(); } |
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static __number _STLP_CALL signaling_NaN() _STLP_NOTHROW { return __number(); } |
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static __number _STLP_CALL denorm_min() _STLP_NOTHROW { return __number(); } |
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}; |
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|
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// Base class for integers. |
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|
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#ifdef _STLP_LIMITED_DEFAULT_TEMPLATES |
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# ifdef _STLP_LONG_LONG |
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# define _STLP_LIMITS_MIN_TYPE _STLP_LONG_LONG |
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# define _STLP_LIMITS_MAX_TYPE unsigned _STLP_LONG_LONG |
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# else |
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# define _STLP_LIMITS_MIN_TYPE long |
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# define _STLP_LIMITS_MAX_TYPE unsigned long |
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# endif |
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#else |
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# define _STLP_LIMITS_MIN_TYPE _Int |
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# define _STLP_LIMITS_MAX_TYPE _Int |
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#endif /* _STLP_LIMITED_DEFAULT_TEMPLATES */ |
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|
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template <class _Int, |
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_STLP_LIMITS_MIN_TYPE __imin, |
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_STLP_LIMITS_MAX_TYPE __imax, |
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int __idigits, bool __ismod> |
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class _Integer_limits : public _Numeric_limits_base<_Int> { |
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public: |
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|
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static _Int (_STLP_CALL min) () _STLP_NOTHROW { return (_Int)__imin; } |
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static _Int (_STLP_CALL max) () _STLP_NOTHROW { return (_Int)__imax; } |
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|
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#if defined (_STLP_STATIC_CONST_INIT_BUG) |
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enum { |
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#else |
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static const int |
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#endif |
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digits = (__idigits < 0) ? |
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((int)((sizeof(_Int) * (CHAR_BIT))) - ((__imin == 0) ? 0 : 1)) |
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: (__idigits), |
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digits10 = (digits * 301UL) / 1000, |
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radix = 2 |
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#if !defined (_STLP_STATIC_CONST_INIT_BUG) |
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; |
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static const bool |
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#else |
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, |
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#endif |
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is_specialized = true, |
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is_signed = (__imin != 0), |
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is_integer = true, |
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is_exact = true, |
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is_bounded = true, |
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is_modulo = __ismod |
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#if defined ( _STLP_STATIC_CONST_INIT_BUG) |
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} |
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#endif |
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; |
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}; |
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|
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// Base class for floating-point numbers. |
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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_round_style __RoundStyle> |
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class _Floating_limits : public _Numeric_limits_base<__number> { |
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public: |
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|
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#if defined (_STLP_STATIC_CONST_INIT_BUG) |
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enum { |
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#else |
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static const int |
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#endif |
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|
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digits = __Digits, |
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digits10 = __Digits10, |
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|
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radix = ( FLT_RADIX /* 2 */ ), |
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min_exponent = __MinExp, |
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max_exponent = __MaxExp, |
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min_exponent10 = __MinExp10, |
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max_exponent10 = __MaxExp10 |
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|
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#if defined (_STLP_STATIC_CONST_INIT_BUG) |
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, |
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has_denorm = denorm_indeterminate, |
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round_style = __RoundStyle, |
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#else |
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; |
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static const float_denorm_style has_denorm = denorm_indeterminate; |
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static const float_round_style round_style = __RoundStyle; |
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static const bool |
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#endif |
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is_specialized = true, |
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is_signed = true, |
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|
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//IEC 559 specify the floating point representation of |
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//infinity, quiet and signaling Not a Number. Not supporting |
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//it is consider as not being able to grant those values. |
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#if (defined (_STLP_MSVC) && (_STLP_MSVC < 1300)) |
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//MSVC 6 do not fully support IEC 599 but grant a good infinity value. |
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has_infinity = true, |
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#else |
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has_infinity = __IsIEC559, |
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#endif |
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has_quiet_NaN = __IsIEC559, |
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has_signaling_NaN = __IsIEC559, |
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|
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has_denorm_loss = false, |
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is_iec559 = __IsIEC559, |
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is_bounded = true, |
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traps = true, |
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tinyness_before= false |
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|
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#if defined (_STLP_STATIC_CONST_INIT_BUG) |
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} |
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#endif |
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; |
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}; |
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|
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_STLP_MOVE_TO_STD_NAMESPACE |
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|
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// Class numeric_limits |
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|
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// The unspecialized class. |
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|
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template<class _Tp> |
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class numeric_limits : public _STLP_PRIV _Numeric_limits_base<_Tp> {}; |
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|
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// Specializations for all built-in integral types. |
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|
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#if !defined (_STLP_NO_BOOL) |
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_STLP_TEMPLATE_NULL |
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class numeric_limits<bool> |
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: public _STLP_PRIV _Integer_limits<bool, false, true, 1, false> |
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{}; |
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#endif /* _STLP_NO_BOOL */ |
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|
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_STLP_TEMPLATE_NULL |
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class numeric_limits<char> |
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: public _STLP_PRIV _Integer_limits<char, CHAR_MIN, CHAR_MAX, -1, true> |
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{}; |
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|
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#if !defined (_STLP_NO_SIGNED_BUILTINS) |
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_STLP_TEMPLATE_NULL |
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class numeric_limits<signed char> |
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: public _STLP_PRIV _Integer_limits<signed char, SCHAR_MIN, SCHAR_MAX, -1, true> |
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{}; |
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#endif |
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|
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_STLP_TEMPLATE_NULL |
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class numeric_limits<unsigned char> |
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: public _STLP_PRIV _Integer_limits<unsigned char, 0, UCHAR_MAX, -1, true> |
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{}; |
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|
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#if !(defined (_STLP_NO_WCHAR_T) || defined (_STLP_WCHAR_T_IS_USHORT)) |
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|
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_STLP_TEMPLATE_NULL |
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class numeric_limits<wchar_t> |
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: public _STLP_PRIV _Integer_limits<wchar_t, WCHAR_MIN, WCHAR_MAX, -1, true> |
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{}; |
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|
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#endif |
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|
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_STLP_TEMPLATE_NULL |
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class numeric_limits<short> |
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: public _STLP_PRIV _Integer_limits<short, SHRT_MIN, SHRT_MAX, -1, true> |
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{}; |
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|
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_STLP_TEMPLATE_NULL |
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class numeric_limits<unsigned short> |
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: public _STLP_PRIV _Integer_limits<unsigned short, 0, USHRT_MAX, -1, true> |
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{}; |
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|
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#if defined (__xlC__) && (__xlC__ == 0x500) |
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# undef INT_MIN |
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# define INT_MIN -2147483648 |
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#endif |
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|
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_STLP_TEMPLATE_NULL |
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class numeric_limits<int> |
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{}; |
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|
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_STLP_TEMPLATE_NULL |
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class numeric_limits<unsigned int> |
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{}; |
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|
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_STLP_TEMPLATE_NULL |
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class numeric_limits<long> |
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{}; |
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|
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_STLP_TEMPLATE_NULL |
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class numeric_limits<unsigned long> |
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{}; |
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#if defined (_STLP_LONG_LONG) |
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# if defined (_STLP_MSVC) || defined (__BORLANDC__) |
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# define LONGLONG_MAX 0x7fffffffffffffffi64 |
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# define LONGLONG_MIN (-LONGLONG_MAX-1i64) |
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# define ULONGLONG_MAX 0xffffffffffffffffUi64 |
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# else |
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# ifndef LONGLONG_MAX |
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# define LONGLONG_MAX 0x7fffffffffffffffLL |
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# endif |
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# ifndef LONGLONG_MIN |
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# define LONGLONG_MIN (-LONGLONG_MAX-1LL) |
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# endif |
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# ifndef ULONGLONG_MAX |
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# define ULONGLONG_MAX 0xffffffffffffffffULL |
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# endif |
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# endif |
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329 |
|
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# if !defined(__GNUC__) || (__GNUC__ == 2 && __GNUC_MINOR__ <= 96) |
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331 |
|
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332 |
_STLP_TEMPLATE_NULL |
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class numeric_limits<_STLP_LONG_LONG> |
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: public _STLP_PRIV _Integer_limits<_STLP_LONG_LONG, LONGLONG_MIN, LONGLONG_MAX, -1, true> |
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335 |
{}; |
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336 |
|
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_STLP_TEMPLATE_NULL |
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class numeric_limits<unsigned _STLP_LONG_LONG> |
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: public _STLP_PRIV _Integer_limits<unsigned _STLP_LONG_LONG, 0, ULONGLONG_MAX, -1, true> |
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{}; |
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# else /* gcc 2.97 (after 2000-11-01), 2.98, 3.0 */ |
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/* |
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newest gcc has new mangling scheme, that has problem |
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with generating name [instantiated] of template specialization like |
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_Integer_limits<_STLP_LONG_LONG, LONGLONG_MIN, LONGLONG_MAX, -1, true> |
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~~~~~~~~~~~~ ~~~~~~~~~~~~ |
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Below is code that solve this problem. |
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- ptr |
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*/ |
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_STLP_TEMPLATE_NULL |
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class numeric_limits<_STLP_LONG_LONG> |
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: public _STLP_PRIV _Numeric_limits_base<_STLP_LONG_LONG> { |
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353 |
public: |
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354 |
|
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static _STLP_LONG_LONG (_STLP_CALL min) () _STLP_NOTHROW { return LONGLONG_MIN; } |
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static _STLP_LONG_LONG (_STLP_CALL max) () _STLP_NOTHROW { return LONGLONG_MAX; } |
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357 |
|
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# if defined ( _STLP_STATIC_CONST_INIT_BUG) |
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enum { |
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# else |
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static const int |
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# endif |
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digits = ((int)((sizeof(_STLP_LONG_LONG) * (CHAR_BIT))) - 1), |
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digits10 = (digits * 301UL) / 1000, |
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radix = 2 |
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# if ! defined (_STLP_STATIC_CONST_INIT_BUG) |
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; |
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static const bool |
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# else |
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370 |
, |
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# endif |
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is_specialized = true, |
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is_signed = true, |
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is_integer = true, |
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is_exact = true, |
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is_bounded = true, |
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is_modulo = true |
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# if defined (_STLP_STATIC_CONST_INIT_BUG) |
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} |
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# endif |
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381 |
; |
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382 |
}; |
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383 |
|
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384 |
_STLP_TEMPLATE_NULL |
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class numeric_limits<unsigned _STLP_LONG_LONG> |
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386 |
: public _STLP_PRIV _Numeric_limits_base<unsigned _STLP_LONG_LONG> { |
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387 |
public: |
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388 |
|
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static unsigned _STLP_LONG_LONG (_STLP_CALL min) () _STLP_NOTHROW { return 0ULL; } |
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static unsigned _STLP_LONG_LONG (_STLP_CALL max) () _STLP_NOTHROW { return ULONGLONG_MAX; } |
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391 |
|
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# if defined (_STLP_STATIC_CONST_INIT_BUG) |
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393 |
enum { |
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394 |
# else |
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static const int |
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396 |
# endif |
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digits = ((int)((sizeof(unsigned _STLP_LONG_LONG) * (CHAR_BIT)))), |
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digits10 = (digits * 301UL) / 1000, |
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radix = 2 |
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# if ! defined (_STLP_STATIC_CONST_INIT_BUG) |
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401 |
; |
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static const bool |
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403 |
# else |
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404 |
, |
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405 |
# endif |
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is_specialized = true, |
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is_signed = false, |
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is_integer = true, |
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is_exact = true, |
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is_bounded = true, |
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is_modulo = true |
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# if defined ( _STLP_STATIC_CONST_INIT_BUG) |
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413 |
} |
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414 |
# endif |
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415 |
; |
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416 |
}; |
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|
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# endif /* __GNUC__ > 2000-11-01 */ |
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|
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#endif /* _STLP_LONG_LONG */ |
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421 |
|
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422 |
_STLP_MOVE_TO_PRIV_NAMESPACE |
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423 |
|
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// Specializations for all built-in floating-point types. |
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template <class __dummy> |
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class _LimG { |
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427 |
public: |
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static float _STLP_CALL get_F_inf(); |
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static float _STLP_CALL get_F_qNaN(); |
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430 |
static float _STLP_CALL get_F_sNaN(); |
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431 |
static double _STLP_CALL get_D_inf(); |
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432 |
static double _STLP_CALL get_D_qNaN(); |
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433 |
static double _STLP_CALL get_D_sNaN(); |
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434 |
|
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#if !defined (_STLP_NO_LONG_DOUBLE) |
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static long double _STLP_CALL get_LD_inf(); |
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static long double _STLP_CALL get_LD_qNaN(); |
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static long double _STLP_CALL get_LD_sNaN(); |
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439 |
#endif |
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440 |
}; |
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441 |
|
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442 |
#if defined (_STLP_USE_TEMPLATE_EXPORT) |
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_STLP_EXPORT_TEMPLATE_CLASS _LimG<bool>; |
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#endif |
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445 |
|
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446 |
_STLP_MOVE_TO_STD_NAMESPACE |
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|
447 |
|
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448 |
_STLP_TEMPLATE_NULL |
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449 |
class numeric_limits<float> |
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: public _STLP_PRIV _Floating_limits<float, |
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451 |
FLT_MANT_DIG, // Binary digits of precision |
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452 |
FLT_DIG, // Decimal digits of precision |
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453 |
FLT_MIN_EXP, // Minimum exponent |
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FLT_MAX_EXP, // Maximum exponent |
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FLT_MIN_10_EXP, // Minimum base 10 exponent |
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456 |
FLT_MAX_10_EXP, // Maximum base 10 exponent |
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#if defined (_STLP_NO_IEC559_SUPPORT) |
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false, // do not conform to iec559 |
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459 |
#else |
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true, // conforms to iec559 |
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461 |
#endif |
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462 |
round_to_nearest> { |
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463 |
public: |
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static float (_STLP_CALL min) () _STLP_NOTHROW { return FLT_MIN; } |
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static float _STLP_CALL denorm_min() _STLP_NOTHROW { return FLT_MIN; } |
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static float (_STLP_CALL max) () _STLP_NOTHROW { _STLP_USING_VENDOR_CSTD return FLT_MAX; } |
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static float _STLP_CALL epsilon() _STLP_NOTHROW { return FLT_EPSILON; } |
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static float _STLP_CALL round_error() _STLP_NOTHROW { return 0.5f; } // Units: ulps. |
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static float _STLP_CALL infinity() _STLP_NOTHROW { return _STLP_PRIV _LimG<bool>::get_F_inf(); } |
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static float _STLP_CALL quiet_NaN() _STLP_NOTHROW { return _STLP_PRIV _LimG<bool>::get_F_qNaN(); } |
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static float _STLP_CALL signaling_NaN() _STLP_NOTHROW { return _STLP_PRIV _LimG<bool>::get_F_sNaN(); } |
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472 |
}; |
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473 |
|
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474 |
_STLP_TEMPLATE_NULL |
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class numeric_limits<double> |
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: public _STLP_PRIV _Floating_limits<double, |
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DBL_MANT_DIG, // Binary digits of precision |
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DBL_DIG, // Decimal digits of precision |
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479 |
DBL_MIN_EXP, // Minimum exponent |
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480 |
DBL_MAX_EXP, // Maximum exponent |
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481 |
DBL_MIN_10_EXP, // Minimum base 10 exponent |
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482 |
DBL_MAX_10_EXP, // Maximum base 10 exponent |
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#if defined (_STLP_NO_IEC559_SUPPORT) |
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484 |
false, // do not conform to iec559 |
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485 |
#else |
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486 |
true, // conforms to iec559 |
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487 |
#endif |
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488 |
round_to_nearest> { |
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|
489 |
public: |
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|
490 |
static double (_STLP_CALL min)() _STLP_NOTHROW { return DBL_MIN; } |
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|
491 |
static double _STLP_CALL denorm_min() _STLP_NOTHROW { return DBL_MIN; } |
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|
492 |
static double (_STLP_CALL max)() _STLP_NOTHROW { _STLP_USING_VENDOR_CSTD return DBL_MAX; } |
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|
493 |
static double _STLP_CALL epsilon() _STLP_NOTHROW { return DBL_EPSILON; } |
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|
494 |
static double _STLP_CALL round_error() _STLP_NOTHROW { return 0.5; } // Units: ulps. |
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|
495 |
static double _STLP_CALL infinity() _STLP_NOTHROW { return _STLP_PRIV _LimG<bool>::get_D_inf(); } |
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496 |
static double _STLP_CALL quiet_NaN() _STLP_NOTHROW { return _STLP_PRIV _LimG<bool>::get_D_qNaN(); } |
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|
497 |
static double _STLP_CALL signaling_NaN() _STLP_NOTHROW { return _STLP_PRIV _LimG<bool>::get_D_sNaN(); } |
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|
498 |
}; |
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|
499 |
|
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500 |
#if !defined (_STLP_NO_LONG_DOUBLE) |
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501 |
|
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|
502 |
_STLP_TEMPLATE_NULL |
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Revision: 201002
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|
503 |
class numeric_limits<long double> |
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Revision: 201002
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|
504 |
: public _STLP_PRIV _Floating_limits<long double, |
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Revision: 201002
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|
505 |
LDBL_MANT_DIG, // Binary digits of precision |
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Revision: 201002
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|
506 |
LDBL_DIG, // Decimal digits of precision |
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|
507 |
LDBL_MIN_EXP, // Minimum exponent |
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|
508 |
LDBL_MAX_EXP, // Maximum exponent |
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Revision: 201002
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|
509 |
LDBL_MIN_10_EXP,// Minimum base 10 exponent |
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Revision: 201002
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|
510 |
LDBL_MAX_10_EXP,// Maximum base 10 exponent |
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Revision: 201002
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|
511 |
false, // do not conform to iec559 |
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Revision: 201002
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|
512 |
round_to_nearest> { |
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Revision: 201002
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|
513 |
public: |
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Revision: 201002
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|
514 |
static long double (_STLP_CALL min) () _STLP_NOTHROW { _STLP_USING_VENDOR_CSTD return LDBL_MIN; } |
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Revision: 201002
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static long double _STLP_CALL denorm_min() _STLP_NOTHROW { _STLP_USING_VENDOR_CSTD return LDBL_MIN; } |
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static long double (_STLP_CALL max) () _STLP_NOTHROW { _STLP_USING_VENDOR_CSTD return LDBL_MAX; } |
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static long double _STLP_CALL epsilon() _STLP_NOTHROW { return LDBL_EPSILON; } |
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static long double _STLP_CALL round_error() _STLP_NOTHROW { return 4; } // Units: ulps. |
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519 |
static long double _STLP_CALL infinity() _STLP_NOTHROW { return _STLP_PRIV _LimG<bool>::get_LD_inf(); } |
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static long double _STLP_CALL quiet_NaN() _STLP_NOTHROW { return _STLP_PRIV _LimG<bool>::get_LD_qNaN(); } |
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static long double _STLP_CALL signaling_NaN() _STLP_NOTHROW { return _STLP_PRIV _LimG<bool>::get_LD_sNaN(); } |
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}; |
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523 |
|
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#endif |
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|
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// We write special values (Inf and NaN) as bit patterns and |
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// cast the the appropriate floating-point types. |
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_STLP_END_NAMESPACE |
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|
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Revision: 201002
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#if !defined (_STLP_LINK_TIME_INSTANTIATION) |
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# include <stl/_limits.c> |
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#endif |
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|
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#endif |
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|
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// Local Variables: |
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// mode:C++ |
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// End: |