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jlechner |
// The template and inlines for the -*- C++ -*- numeric_limits classes.
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// Copyright (C) 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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/** @file limits
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* This is a Standard C++ Library header.
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*/
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// Note: this is not a conforming implementation.
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// Written by Gabriel Dos Reis <gdr@codesourcery.com>
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//
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// ISO 14882:1998
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// 18.2.1
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//
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#ifndef _GLIBCXX_NUMERIC_LIMITS
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#define _GLIBCXX_NUMERIC_LIMITS 1
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#pragma GCC system_header
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#include <bits/c++config.h>
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//
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// The numeric_limits<> traits document implementation-defined aspects
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// of fundamental arithmetic data types (integers and floating points).
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// From Standard C++ point of view, there are 13 such types:
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// * integers
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// bool (1)
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// char, signed char, unsigned char (3)
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// short, unsigned short (2)
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// int, unsigned (2)
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// long, unsigned long (2)
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//
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// * floating points
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// float (1)
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// double (1)
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// long double (1)
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//
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// GNU C++ undertstands (where supported by the host C-library)
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// * integer
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// long long, unsigned long long (2)
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//
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// which brings us to 15 fundamental arithmetic data types in GNU C++.
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//
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//
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// Since a numeric_limits<> is a bit tricky to get right, we rely on
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// an interface composed of macros which should be defined in config/os
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// or config/cpu when they differ from the generic (read arbitrary)
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// definitions given here.
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//
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// These values can be overridden in the target configuration file.
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// The default values are appropriate for many 32-bit targets.
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// GCC only intrinsicly supports modulo integral types. The only remaining
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// integral exceptional values is division by zero. Only targets that do not
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// signal division by zero in some "hard to ignore" way should use false.
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#ifndef __glibcxx_integral_traps
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# define __glibcxx_integral_traps true
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#endif
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// float
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//
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// Default values. Should be overriden in configuration files if necessary.
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#ifndef __glibcxx_float_has_denorm_loss
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# define __glibcxx_float_has_denorm_loss false
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#endif
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#ifndef __glibcxx_float_traps
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# define __glibcxx_float_traps false
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#endif
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#ifndef __glibcxx_float_tinyness_before
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# define __glibcxx_float_tinyness_before false
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#endif
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// double
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// Default values. Should be overriden in configuration files if necessary.
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#ifndef __glibcxx_double_has_denorm_loss
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# define __glibcxx_double_has_denorm_loss false
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#endif
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#ifndef __glibcxx_double_traps
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# define __glibcxx_double_traps false
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#endif
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#ifndef __glibcxx_double_tinyness_before
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# define __glibcxx_double_tinyness_before false
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#endif
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// long double
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// Default values. Should be overriden in configuration files if necessary.
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#ifndef __glibcxx_long_double_has_denorm_loss
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# define __glibcxx_long_double_has_denorm_loss false
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#endif
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#ifndef __glibcxx_long_double_traps
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# define __glibcxx_long_double_traps false
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#endif
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#ifndef __glibcxx_long_double_tinyness_before
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# define __glibcxx_long_double_tinyness_before false
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#endif
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// You should not need to define any macros below this point.
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#define __glibcxx_signed(T) ((T)(-1) < 0)
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#define __glibcxx_min(T) \
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(__glibcxx_signed (T) ? (T)1 << __glibcxx_digits (T) : (T)0)
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#define __glibcxx_max(T) \
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(__glibcxx_signed (T) ? ((T)1 << __glibcxx_digits (T)) - 1 : ~(T)0)
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#define __glibcxx_digits(T) \
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(sizeof(T) * __CHAR_BIT__ - __glibcxx_signed (T))
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// The fraction 643/2136 approximates log10(2) to 7 significant digits.
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#define __glibcxx_digits10(T) \
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(__glibcxx_digits (T) * 643 / 2136)
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namespace std
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{
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/**
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* @brief Describes the rounding style for floating-point types.
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*
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* This is used in the std::numeric_limits class.
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*/
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enum float_round_style
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{
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round_indeterminate = -1, ///< Self-explanatory.
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round_toward_zero = 0, ///< Self-explanatory.
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round_to_nearest = 1, ///< To the nearest representable value.
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round_toward_infinity = 2, ///< Self-explanatory.
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round_toward_neg_infinity = 3 ///< Self-explanatory.
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};
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/**
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* @brief Describes the denormalization for floating-point types.
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*
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* These values represent the presence or absence of a variable number
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* of exponent bits. This type is used in the std::numeric_limits class.
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*/
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enum float_denorm_style
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{
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/// Indeterminate at compile time whether denormalized values are allowed.
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denorm_indeterminate = -1,
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/// The type does not allow denormalized values.
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denorm_absent = 0,
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/// The type allows denormalized values.
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denorm_present = 1
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};
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/**
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* @brief Part of std::numeric_limits.
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*
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* The @c static @c const members are usable as integral constant
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* expressions.
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*
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* @note This is a seperate class for purposes of efficiency; you
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* should only access these members as part of an instantiation
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* of the std::numeric_limits class.
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*/
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struct __numeric_limits_base
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{
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/** This will be true for all fundamental types (which have
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specializations), and false for everything else. */
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static const bool is_specialized = false;
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/** The number of @c radix digits that be represented without change: for
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integer types, the number of non-sign bits in the mantissa; for
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floating types, the number of @c radix digits in the mantissa. */
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static const int digits = 0;
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/** The number of base 10 digits that can be represented without change. */
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static const int digits10 = 0;
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/** True if the type is signed. */
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static const bool is_signed = false;
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/** True if the type is integer.
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* @if maint
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* Is this supposed to be "if the type is integral"?
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* @endif
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*/
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static const bool is_integer = false;
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/** True if the type uses an exact representation. "All integer types are
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exact, but not all exact types are integer. For example, rational and
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fixed-exponent representations are exact but not integer."
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[18.2.1.2]/15 */
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static const bool is_exact = false;
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/** For integer types, specifies the base of the representation. For
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floating types, specifies the base of the exponent representation. */
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static const int radix = 0;
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/** The minimum negative integer such that @c radix raised to the power of
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(one less than that integer) is a normalized floating point number. */
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static const int min_exponent = 0;
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/** The minimum negative integer such that 10 raised to that power is in
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the range of normalized floating point numbers. */
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static const int min_exponent10 = 0;
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/** The maximum positive integer such that @c radix raised to the power of
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(one less than that integer) is a representable finite floating point
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number. */
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static const int max_exponent = 0;
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/** The maximum positive integer such that 10 raised to that power is in
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the range of representable finite floating point numbers. */
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static const int max_exponent10 = 0;
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/** True if the type has a representation for positive infinity. */
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static const bool has_infinity = false;
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/** True if the type has a representation for a quiet (non-signaling)
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"Not a Number." */
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static const bool has_quiet_NaN = false;
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/** True if the type has a representation for a signaling
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"Not a Number." */
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static const bool has_signaling_NaN = false;
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/** See std::float_denorm_style for more information. */
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static const float_denorm_style has_denorm = denorm_absent;
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/** "True if loss of accuracy is detected as a denormalization loss,
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rather than as an inexact result." [18.2.1.2]/42 */
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static const bool has_denorm_loss = false;
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/** True if-and-only-if the type adheres to the IEC 559 standard, also
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known as IEEE 754. (Only makes sense for floating point types.) */
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static const bool is_iec559 = false;
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/** "True if the set of values representable by the type is finite. All
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built-in types are bounded, this member would be false for arbitrary
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precision types." [18.2.1.2]/54 */
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static const bool is_bounded = false;
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/** True if the type is @e modulo, that is, if it is possible to add two
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positive numbers and have a result that wraps around to a third number
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that is less. Typically false for floating types, true for unsigned
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integers, and true for signed integers. */
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static const bool is_modulo = false;
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/** True if trapping is implemented for this type. */
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static const bool traps = false;
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/** True if tinyness is detected before rounding. (see IEC 559) */
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static const bool tinyness_before = false;
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/** See std::float_round_style for more information. This is only
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meaningful for floating types; integer types will all be
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round_toward_zero. */
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static const float_round_style round_style = round_toward_zero;
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};
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/**
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* @brief Properties of fundamental types.
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*
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* This class allows a program to obtain information about the
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* representation of a fundamental type on a given platform. For
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* non-fundamental types, the functions will return 0 and the data
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* members will all be @c false.
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*
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* @if maint
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* _GLIBCXX_RESOLVE_LIB_DEFECTS: DRs 201 and 184 (hi Gaby!) are
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* noted, but not incorporated in this documented (yet).
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* @endif
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*/
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template<typename _Tp>
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struct numeric_limits : public __numeric_limits_base
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{
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/** The minimum finite value, or for floating types with
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denormalization, the minimum positive normalized value. */
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static _Tp min() throw() { return static_cast<_Tp>(0); }
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/** The maximum finite value. */
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static _Tp max() throw() { return static_cast<_Tp>(0); }
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/** The @e machine @e epsilon: the difference between 1 and the least
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value greater than 1 that is representable. */
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static _Tp epsilon() throw() { return static_cast<_Tp>(0); }
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/** The maximum rounding error measurement (see LIA-1). */
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static _Tp round_error() throw() { return static_cast<_Tp>(0); }
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/** The representation of positive infinity, if @c has_infinity. */
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static _Tp infinity() throw() { return static_cast<_Tp>(0); }
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/** The representation of a quiet "Not a Number," if @c has_quiet_NaN. */
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static _Tp quiet_NaN() throw() { return static_cast<_Tp>(0); }
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/** The representation of a signaling "Not a Number," if
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@c has_signaling_NaN. */
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static _Tp signaling_NaN() throw() { return static_cast<_Tp>(0); }
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/** The minimum positive denormalized value. For types where
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@c has_denorm is false, this is the minimum positive normalized
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value. */
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static _Tp denorm_min() throw() { return static_cast<_Tp>(0); }
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};
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// Now there follow 15 explicit specializations. Yes, 15. Make sure
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// you get the count right.
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/// numeric_limits<bool> specialization.
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template<>
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struct numeric_limits<bool>
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{
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static const bool is_specialized = true;
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static bool min() throw()
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{ return false; }
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static bool max() throw()
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{ return true; }
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static const int digits = 1;
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static const int digits10 = 0;
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static const bool is_signed = false;
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static const bool is_integer = true;
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static const bool is_exact = true;
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static const int radix = 2;
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static bool epsilon() throw()
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{ return false; }
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static bool round_error() throw()
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{ return false; }
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static const int min_exponent = 0;
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static const int min_exponent10 = 0;
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static const int max_exponent = 0;
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static const int max_exponent10 = 0;
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static const bool has_infinity = false;
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static const bool has_quiet_NaN = false;
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static const bool has_signaling_NaN = false;
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static const float_denorm_style has_denorm = denorm_absent;
|
344 |
|
|
static const bool has_denorm_loss = false;
|
345 |
|
|
|
346 |
|
|
static bool infinity() throw()
|
347 |
|
|
{ return false; }
|
348 |
|
|
static bool quiet_NaN() throw()
|
349 |
|
|
{ return false; }
|
350 |
|
|
static bool signaling_NaN() throw()
|
351 |
|
|
{ return false; }
|
352 |
|
|
static bool denorm_min() throw()
|
353 |
|
|
{ return false; }
|
354 |
|
|
|
355 |
|
|
static const bool is_iec559 = false;
|
356 |
|
|
static const bool is_bounded = true;
|
357 |
|
|
static const bool is_modulo = false;
|
358 |
|
|
|
359 |
|
|
// It is not clear what it means for a boolean type to trap.
|
360 |
|
|
// This is a DR on the LWG issue list. Here, I use integer
|
361 |
|
|
// promotion semantics.
|
362 |
|
|
static const bool traps = __glibcxx_integral_traps;
|
363 |
|
|
static const bool tinyness_before = false;
|
364 |
|
|
static const float_round_style round_style = round_toward_zero;
|
365 |
|
|
};
|
366 |
|
|
|
367 |
|
|
/// numeric_limits<char> specialization.
|
368 |
|
|
template<>
|
369 |
|
|
struct numeric_limits<char>
|
370 |
|
|
{
|
371 |
|
|
static const bool is_specialized = true;
|
372 |
|
|
|
373 |
|
|
static char min() throw()
|
374 |
|
|
{ return __glibcxx_min(char); }
|
375 |
|
|
static char max() throw()
|
376 |
|
|
{ return __glibcxx_max(char); }
|
377 |
|
|
|
378 |
|
|
static const int digits = __glibcxx_digits (char);
|
379 |
|
|
static const int digits10 = __glibcxx_digits10 (char);
|
380 |
|
|
static const bool is_signed = __glibcxx_signed (char);
|
381 |
|
|
static const bool is_integer = true;
|
382 |
|
|
static const bool is_exact = true;
|
383 |
|
|
static const int radix = 2;
|
384 |
|
|
static char epsilon() throw()
|
385 |
|
|
{ return 0; }
|
386 |
|
|
static char round_error() throw()
|
387 |
|
|
{ return 0; }
|
388 |
|
|
|
389 |
|
|
static const int min_exponent = 0;
|
390 |
|
|
static const int min_exponent10 = 0;
|
391 |
|
|
static const int max_exponent = 0;
|
392 |
|
|
static const int max_exponent10 = 0;
|
393 |
|
|
|
394 |
|
|
static const bool has_infinity = false;
|
395 |
|
|
static const bool has_quiet_NaN = false;
|
396 |
|
|
static const bool has_signaling_NaN = false;
|
397 |
|
|
static const float_denorm_style has_denorm = denorm_absent;
|
398 |
|
|
static const bool has_denorm_loss = false;
|
399 |
|
|
|
400 |
|
|
static char infinity() throw()
|
401 |
|
|
{ return char(); }
|
402 |
|
|
static char quiet_NaN() throw()
|
403 |
|
|
{ return char(); }
|
404 |
|
|
static char signaling_NaN() throw()
|
405 |
|
|
{ return char(); }
|
406 |
|
|
static char denorm_min() throw()
|
407 |
|
|
{ return static_cast<char>(0); }
|
408 |
|
|
|
409 |
|
|
static const bool is_iec559 = false;
|
410 |
|
|
static const bool is_bounded = true;
|
411 |
|
|
static const bool is_modulo = true;
|
412 |
|
|
|
413 |
|
|
static const bool traps = __glibcxx_integral_traps;
|
414 |
|
|
static const bool tinyness_before = false;
|
415 |
|
|
static const float_round_style round_style = round_toward_zero;
|
416 |
|
|
};
|
417 |
|
|
|
418 |
|
|
/// numeric_limits<signed char> specialization.
|
419 |
|
|
template<>
|
420 |
|
|
struct numeric_limits<signed char>
|
421 |
|
|
{
|
422 |
|
|
static const bool is_specialized = true;
|
423 |
|
|
|
424 |
|
|
static signed char min() throw()
|
425 |
|
|
{ return -__SCHAR_MAX__ - 1; }
|
426 |
|
|
static signed char max() throw()
|
427 |
|
|
{ return __SCHAR_MAX__; }
|
428 |
|
|
|
429 |
|
|
static const int digits = __glibcxx_digits (signed char);
|
430 |
|
|
static const int digits10 = __glibcxx_digits10 (signed char);
|
431 |
|
|
static const bool is_signed = true;
|
432 |
|
|
static const bool is_integer = true;
|
433 |
|
|
static const bool is_exact = true;
|
434 |
|
|
static const int radix = 2;
|
435 |
|
|
static signed char epsilon() throw()
|
436 |
|
|
{ return 0; }
|
437 |
|
|
static signed char round_error() throw()
|
438 |
|
|
{ return 0; }
|
439 |
|
|
|
440 |
|
|
static const int min_exponent = 0;
|
441 |
|
|
static const int min_exponent10 = 0;
|
442 |
|
|
static const int max_exponent = 0;
|
443 |
|
|
static const int max_exponent10 = 0;
|
444 |
|
|
|
445 |
|
|
static const bool has_infinity = false;
|
446 |
|
|
static const bool has_quiet_NaN = false;
|
447 |
|
|
static const bool has_signaling_NaN = false;
|
448 |
|
|
static const float_denorm_style has_denorm = denorm_absent;
|
449 |
|
|
static const bool has_denorm_loss = false;
|
450 |
|
|
|
451 |
|
|
static signed char infinity() throw()
|
452 |
|
|
{ return static_cast<signed char>(0); }
|
453 |
|
|
static signed char quiet_NaN() throw()
|
454 |
|
|
{ return static_cast<signed char>(0); }
|
455 |
|
|
static signed char signaling_NaN() throw()
|
456 |
|
|
{ return static_cast<signed char>(0); }
|
457 |
|
|
static signed char denorm_min() throw()
|
458 |
|
|
{ return static_cast<signed char>(0); }
|
459 |
|
|
|
460 |
|
|
static const bool is_iec559 = false;
|
461 |
|
|
static const bool is_bounded = true;
|
462 |
|
|
static const bool is_modulo = true;
|
463 |
|
|
|
464 |
|
|
static const bool traps = __glibcxx_integral_traps;
|
465 |
|
|
static const bool tinyness_before = false;
|
466 |
|
|
static const float_round_style round_style = round_toward_zero;
|
467 |
|
|
};
|
468 |
|
|
|
469 |
|
|
/// numeric_limits<unsigned char> specialization.
|
470 |
|
|
template<>
|
471 |
|
|
struct numeric_limits<unsigned char>
|
472 |
|
|
{
|
473 |
|
|
static const bool is_specialized = true;
|
474 |
|
|
|
475 |
|
|
static unsigned char min() throw()
|
476 |
|
|
{ return 0; }
|
477 |
|
|
static unsigned char max() throw()
|
478 |
|
|
{ return __SCHAR_MAX__ * 2U + 1; }
|
479 |
|
|
|
480 |
|
|
static const int digits = __glibcxx_digits (unsigned char);
|
481 |
|
|
static const int digits10 = __glibcxx_digits10 (unsigned char);
|
482 |
|
|
static const bool is_signed = false;
|
483 |
|
|
static const bool is_integer = true;
|
484 |
|
|
static const bool is_exact = true;
|
485 |
|
|
static const int radix = 2;
|
486 |
|
|
static unsigned char epsilon() throw()
|
487 |
|
|
{ return 0; }
|
488 |
|
|
static unsigned char round_error() throw()
|
489 |
|
|
{ return 0; }
|
490 |
|
|
|
491 |
|
|
static const int min_exponent = 0;
|
492 |
|
|
static const int min_exponent10 = 0;
|
493 |
|
|
static const int max_exponent = 0;
|
494 |
|
|
static const int max_exponent10 = 0;
|
495 |
|
|
|
496 |
|
|
static const bool has_infinity = false;
|
497 |
|
|
static const bool has_quiet_NaN = false;
|
498 |
|
|
static const bool has_signaling_NaN = false;
|
499 |
|
|
static const float_denorm_style has_denorm = denorm_absent;
|
500 |
|
|
static const bool has_denorm_loss = false;
|
501 |
|
|
|
502 |
|
|
static unsigned char infinity() throw()
|
503 |
|
|
{ return static_cast<unsigned char>(0); }
|
504 |
|
|
static unsigned char quiet_NaN() throw()
|
505 |
|
|
{ return static_cast<unsigned char>(0); }
|
506 |
|
|
static unsigned char signaling_NaN() throw()
|
507 |
|
|
{ return static_cast<unsigned char>(0); }
|
508 |
|
|
static unsigned char denorm_min() throw()
|
509 |
|
|
{ return static_cast<unsigned char>(0); }
|
510 |
|
|
|
511 |
|
|
static const bool is_iec559 = false;
|
512 |
|
|
static const bool is_bounded = true;
|
513 |
|
|
static const bool is_modulo = true;
|
514 |
|
|
|
515 |
|
|
static const bool traps = __glibcxx_integral_traps;
|
516 |
|
|
static const bool tinyness_before = false;
|
517 |
|
|
static const float_round_style round_style = round_toward_zero;
|
518 |
|
|
};
|
519 |
|
|
|
520 |
|
|
/// numeric_limits<wchar_t> specialization.
|
521 |
|
|
template<>
|
522 |
|
|
struct numeric_limits<wchar_t>
|
523 |
|
|
{
|
524 |
|
|
static const bool is_specialized = true;
|
525 |
|
|
|
526 |
|
|
static wchar_t min() throw()
|
527 |
|
|
{ return __glibcxx_min (wchar_t); }
|
528 |
|
|
static wchar_t max() throw()
|
529 |
|
|
{ return __glibcxx_max (wchar_t); }
|
530 |
|
|
|
531 |
|
|
static const int digits = __glibcxx_digits (wchar_t);
|
532 |
|
|
static const int digits10 = __glibcxx_digits10 (wchar_t);
|
533 |
|
|
static const bool is_signed = __glibcxx_signed (wchar_t);
|
534 |
|
|
static const bool is_integer = true;
|
535 |
|
|
static const bool is_exact = true;
|
536 |
|
|
static const int radix = 2;
|
537 |
|
|
static wchar_t epsilon() throw()
|
538 |
|
|
{ return 0; }
|
539 |
|
|
static wchar_t round_error() throw()
|
540 |
|
|
{ return 0; }
|
541 |
|
|
|
542 |
|
|
static const int min_exponent = 0;
|
543 |
|
|
static const int min_exponent10 = 0;
|
544 |
|
|
static const int max_exponent = 0;
|
545 |
|
|
static const int max_exponent10 = 0;
|
546 |
|
|
|
547 |
|
|
static const bool has_infinity = false;
|
548 |
|
|
static const bool has_quiet_NaN = false;
|
549 |
|
|
static const bool has_signaling_NaN = false;
|
550 |
|
|
static const float_denorm_style has_denorm = denorm_absent;
|
551 |
|
|
static const bool has_denorm_loss = false;
|
552 |
|
|
|
553 |
|
|
static wchar_t infinity() throw()
|
554 |
|
|
{ return wchar_t(); }
|
555 |
|
|
static wchar_t quiet_NaN() throw()
|
556 |
|
|
{ return wchar_t(); }
|
557 |
|
|
static wchar_t signaling_NaN() throw()
|
558 |
|
|
{ return wchar_t(); }
|
559 |
|
|
static wchar_t denorm_min() throw()
|
560 |
|
|
{ return wchar_t(); }
|
561 |
|
|
|
562 |
|
|
static const bool is_iec559 = false;
|
563 |
|
|
static const bool is_bounded = true;
|
564 |
|
|
static const bool is_modulo = true;
|
565 |
|
|
|
566 |
|
|
static const bool traps = __glibcxx_integral_traps;
|
567 |
|
|
static const bool tinyness_before = false;
|
568 |
|
|
static const float_round_style round_style = round_toward_zero;
|
569 |
|
|
};
|
570 |
|
|
|
571 |
|
|
/// numeric_limits<short> specialization.
|
572 |
|
|
template<>
|
573 |
|
|
struct numeric_limits<short>
|
574 |
|
|
{
|
575 |
|
|
static const bool is_specialized = true;
|
576 |
|
|
|
577 |
|
|
static short min() throw()
|
578 |
|
|
{ return -__SHRT_MAX__ - 1; }
|
579 |
|
|
static short max() throw()
|
580 |
|
|
{ return __SHRT_MAX__; }
|
581 |
|
|
|
582 |
|
|
static const int digits = __glibcxx_digits (short);
|
583 |
|
|
static const int digits10 = __glibcxx_digits10 (short);
|
584 |
|
|
static const bool is_signed = true;
|
585 |
|
|
static const bool is_integer = true;
|
586 |
|
|
static const bool is_exact = true;
|
587 |
|
|
static const int radix = 2;
|
588 |
|
|
static short epsilon() throw()
|
589 |
|
|
{ return 0; }
|
590 |
|
|
static short round_error() throw()
|
591 |
|
|
{ return 0; }
|
592 |
|
|
|
593 |
|
|
static const int min_exponent = 0;
|
594 |
|
|
static const int min_exponent10 = 0;
|
595 |
|
|
static const int max_exponent = 0;
|
596 |
|
|
static const int max_exponent10 = 0;
|
597 |
|
|
|
598 |
|
|
static const bool has_infinity = false;
|
599 |
|
|
static const bool has_quiet_NaN = false;
|
600 |
|
|
static const bool has_signaling_NaN = false;
|
601 |
|
|
static const float_denorm_style has_denorm = denorm_absent;
|
602 |
|
|
static const bool has_denorm_loss = false;
|
603 |
|
|
|
604 |
|
|
static short infinity() throw()
|
605 |
|
|
{ return short(); }
|
606 |
|
|
static short quiet_NaN() throw()
|
607 |
|
|
{ return short(); }
|
608 |
|
|
static short signaling_NaN() throw()
|
609 |
|
|
{ return short(); }
|
610 |
|
|
static short denorm_min() throw()
|
611 |
|
|
{ return short(); }
|
612 |
|
|
|
613 |
|
|
static const bool is_iec559 = false;
|
614 |
|
|
static const bool is_bounded = true;
|
615 |
|
|
static const bool is_modulo = true;
|
616 |
|
|
|
617 |
|
|
static const bool traps = __glibcxx_integral_traps;
|
618 |
|
|
static const bool tinyness_before = false;
|
619 |
|
|
static const float_round_style round_style = round_toward_zero;
|
620 |
|
|
};
|
621 |
|
|
|
622 |
|
|
/// numeric_limits<unsigned short> specialization.
|
623 |
|
|
template<>
|
624 |
|
|
struct numeric_limits<unsigned short>
|
625 |
|
|
{
|
626 |
|
|
static const bool is_specialized = true;
|
627 |
|
|
|
628 |
|
|
static unsigned short min() throw()
|
629 |
|
|
{ return 0; }
|
630 |
|
|
static unsigned short max() throw()
|
631 |
|
|
{ return __SHRT_MAX__ * 2U + 1; }
|
632 |
|
|
|
633 |
|
|
static const int digits = __glibcxx_digits (unsigned short);
|
634 |
|
|
static const int digits10 = __glibcxx_digits10 (unsigned short);
|
635 |
|
|
static const bool is_signed = false;
|
636 |
|
|
static const bool is_integer = true;
|
637 |
|
|
static const bool is_exact = true;
|
638 |
|
|
static const int radix = 2;
|
639 |
|
|
static unsigned short epsilon() throw()
|
640 |
|
|
{ return 0; }
|
641 |
|
|
static unsigned short round_error() throw()
|
642 |
|
|
{ return 0; }
|
643 |
|
|
|
644 |
|
|
static const int min_exponent = 0;
|
645 |
|
|
static const int min_exponent10 = 0;
|
646 |
|
|
static const int max_exponent = 0;
|
647 |
|
|
static const int max_exponent10 = 0;
|
648 |
|
|
|
649 |
|
|
static const bool has_infinity = false;
|
650 |
|
|
static const bool has_quiet_NaN = false;
|
651 |
|
|
static const bool has_signaling_NaN = false;
|
652 |
|
|
static const float_denorm_style has_denorm = denorm_absent;
|
653 |
|
|
static const bool has_denorm_loss = false;
|
654 |
|
|
|
655 |
|
|
static unsigned short infinity() throw()
|
656 |
|
|
{ return static_cast<unsigned short>(0); }
|
657 |
|
|
static unsigned short quiet_NaN() throw()
|
658 |
|
|
{ return static_cast<unsigned short>(0); }
|
659 |
|
|
static unsigned short signaling_NaN() throw()
|
660 |
|
|
{ return static_cast<unsigned short>(0); }
|
661 |
|
|
static unsigned short denorm_min() throw()
|
662 |
|
|
{ return static_cast<unsigned short>(0); }
|
663 |
|
|
|
664 |
|
|
static const bool is_iec559 = false;
|
665 |
|
|
static const bool is_bounded = true;
|
666 |
|
|
static const bool is_modulo = true;
|
667 |
|
|
|
668 |
|
|
static const bool traps = __glibcxx_integral_traps;
|
669 |
|
|
static const bool tinyness_before = false;
|
670 |
|
|
static const float_round_style round_style = round_toward_zero;
|
671 |
|
|
};
|
672 |
|
|
|
673 |
|
|
/// numeric_limits<int> specialization.
|
674 |
|
|
template<>
|
675 |
|
|
struct numeric_limits<int>
|
676 |
|
|
{
|
677 |
|
|
static const bool is_specialized = true;
|
678 |
|
|
|
679 |
|
|
static int min() throw()
|
680 |
|
|
{ return -__INT_MAX__ - 1; }
|
681 |
|
|
static int max() throw()
|
682 |
|
|
{ return __INT_MAX__; }
|
683 |
|
|
|
684 |
|
|
static const int digits = __glibcxx_digits (int);
|
685 |
|
|
static const int digits10 = __glibcxx_digits10 (int);
|
686 |
|
|
static const bool is_signed = true;
|
687 |
|
|
static const bool is_integer = true;
|
688 |
|
|
static const bool is_exact = true;
|
689 |
|
|
static const int radix = 2;
|
690 |
|
|
static int epsilon() throw()
|
691 |
|
|
{ return 0; }
|
692 |
|
|
static int round_error() throw()
|
693 |
|
|
{ return 0; }
|
694 |
|
|
|
695 |
|
|
static const int min_exponent = 0;
|
696 |
|
|
static const int min_exponent10 = 0;
|
697 |
|
|
static const int max_exponent = 0;
|
698 |
|
|
static const int max_exponent10 = 0;
|
699 |
|
|
|
700 |
|
|
static const bool has_infinity = false;
|
701 |
|
|
static const bool has_quiet_NaN = false;
|
702 |
|
|
static const bool has_signaling_NaN = false;
|
703 |
|
|
static const float_denorm_style has_denorm = denorm_absent;
|
704 |
|
|
static const bool has_denorm_loss = false;
|
705 |
|
|
|
706 |
|
|
static int infinity() throw()
|
707 |
|
|
{ return static_cast<int>(0); }
|
708 |
|
|
static int quiet_NaN() throw()
|
709 |
|
|
{ return static_cast<int>(0); }
|
710 |
|
|
static int signaling_NaN() throw()
|
711 |
|
|
{ return static_cast<int>(0); }
|
712 |
|
|
static int denorm_min() throw()
|
713 |
|
|
{ return static_cast<int>(0); }
|
714 |
|
|
|
715 |
|
|
static const bool is_iec559 = false;
|
716 |
|
|
static const bool is_bounded = true;
|
717 |
|
|
static const bool is_modulo = true;
|
718 |
|
|
|
719 |
|
|
static const bool traps = __glibcxx_integral_traps;
|
720 |
|
|
static const bool tinyness_before = false;
|
721 |
|
|
static const float_round_style round_style = round_toward_zero;
|
722 |
|
|
};
|
723 |
|
|
|
724 |
|
|
/// numeric_limits<unsigned int> specialization.
|
725 |
|
|
template<>
|
726 |
|
|
struct numeric_limits<unsigned int>
|
727 |
|
|
{
|
728 |
|
|
static const bool is_specialized = true;
|
729 |
|
|
|
730 |
|
|
static unsigned int min() throw()
|
731 |
|
|
{ return 0; }
|
732 |
|
|
static unsigned int max() throw()
|
733 |
|
|
{ return __INT_MAX__ * 2U + 1; }
|
734 |
|
|
|
735 |
|
|
static const int digits = __glibcxx_digits (unsigned int);
|
736 |
|
|
static const int digits10 = __glibcxx_digits10 (unsigned int);
|
737 |
|
|
static const bool is_signed = false;
|
738 |
|
|
static const bool is_integer = true;
|
739 |
|
|
static const bool is_exact = true;
|
740 |
|
|
static const int radix = 2;
|
741 |
|
|
static unsigned int epsilon() throw()
|
742 |
|
|
{ return 0; }
|
743 |
|
|
static unsigned int round_error() throw()
|
744 |
|
|
{ return 0; }
|
745 |
|
|
|
746 |
|
|
static const int min_exponent = 0;
|
747 |
|
|
static const int min_exponent10 = 0;
|
748 |
|
|
static const int max_exponent = 0;
|
749 |
|
|
static const int max_exponent10 = 0;
|
750 |
|
|
|
751 |
|
|
static const bool has_infinity = false;
|
752 |
|
|
static const bool has_quiet_NaN = false;
|
753 |
|
|
static const bool has_signaling_NaN = false;
|
754 |
|
|
static const float_denorm_style has_denorm = denorm_absent;
|
755 |
|
|
static const bool has_denorm_loss = false;
|
756 |
|
|
|
757 |
|
|
static unsigned int infinity() throw()
|
758 |
|
|
{ return static_cast<unsigned int>(0); }
|
759 |
|
|
static unsigned int quiet_NaN() throw()
|
760 |
|
|
{ return static_cast<unsigned int>(0); }
|
761 |
|
|
static unsigned int signaling_NaN() throw()
|
762 |
|
|
{ return static_cast<unsigned int>(0); }
|
763 |
|
|
static unsigned int denorm_min() throw()
|
764 |
|
|
{ return static_cast<unsigned int>(0); }
|
765 |
|
|
|
766 |
|
|
static const bool is_iec559 = false;
|
767 |
|
|
static const bool is_bounded = true;
|
768 |
|
|
static const bool is_modulo = true;
|
769 |
|
|
|
770 |
|
|
static const bool traps = __glibcxx_integral_traps;
|
771 |
|
|
static const bool tinyness_before = false;
|
772 |
|
|
static const float_round_style round_style = round_toward_zero;
|
773 |
|
|
};
|
774 |
|
|
|
775 |
|
|
/// numeric_limits<long> specialization.
|
776 |
|
|
template<>
|
777 |
|
|
struct numeric_limits<long>
|
778 |
|
|
{
|
779 |
|
|
static const bool is_specialized = true;
|
780 |
|
|
|
781 |
|
|
static long min() throw()
|
782 |
|
|
{ return -__LONG_MAX__ - 1; }
|
783 |
|
|
static long max() throw()
|
784 |
|
|
{ return __LONG_MAX__; }
|
785 |
|
|
|
786 |
|
|
static const int digits = __glibcxx_digits (long);
|
787 |
|
|
static const int digits10 = __glibcxx_digits10 (long);
|
788 |
|
|
static const bool is_signed = true;
|
789 |
|
|
static const bool is_integer = true;
|
790 |
|
|
static const bool is_exact = true;
|
791 |
|
|
static const int radix = 2;
|
792 |
|
|
static long epsilon() throw()
|
793 |
|
|
{ return 0; }
|
794 |
|
|
static long round_error() throw()
|
795 |
|
|
{ return 0; }
|
796 |
|
|
|
797 |
|
|
static const int min_exponent = 0;
|
798 |
|
|
static const int min_exponent10 = 0;
|
799 |
|
|
static const int max_exponent = 0;
|
800 |
|
|
static const int max_exponent10 = 0;
|
801 |
|
|
|
802 |
|
|
static const bool has_infinity = false;
|
803 |
|
|
static const bool has_quiet_NaN = false;
|
804 |
|
|
static const bool has_signaling_NaN = false;
|
805 |
|
|
static const float_denorm_style has_denorm = denorm_absent;
|
806 |
|
|
static const bool has_denorm_loss = false;
|
807 |
|
|
|
808 |
|
|
static long infinity() throw()
|
809 |
|
|
{ return static_cast<long>(0); }
|
810 |
|
|
static long quiet_NaN() throw()
|
811 |
|
|
{ return static_cast<long>(0); }
|
812 |
|
|
static long signaling_NaN() throw()
|
813 |
|
|
{ return static_cast<long>(0); }
|
814 |
|
|
static long denorm_min() throw()
|
815 |
|
|
{ return static_cast<long>(0); }
|
816 |
|
|
|
817 |
|
|
static const bool is_iec559 = false;
|
818 |
|
|
static const bool is_bounded = true;
|
819 |
|
|
static const bool is_modulo = true;
|
820 |
|
|
|
821 |
|
|
static const bool traps = __glibcxx_integral_traps;
|
822 |
|
|
static const bool tinyness_before = false;
|
823 |
|
|
static const float_round_style round_style = round_toward_zero;
|
824 |
|
|
};
|
825 |
|
|
|
826 |
|
|
/// numeric_limits<unsigned long> specialization.
|
827 |
|
|
template<>
|
828 |
|
|
struct numeric_limits<unsigned long>
|
829 |
|
|
{
|
830 |
|
|
static const bool is_specialized = true;
|
831 |
|
|
|
832 |
|
|
static unsigned long min() throw()
|
833 |
|
|
{ return 0; }
|
834 |
|
|
static unsigned long max() throw()
|
835 |
|
|
{ return __LONG_MAX__ * 2UL + 1; }
|
836 |
|
|
|
837 |
|
|
static const int digits = __glibcxx_digits (unsigned long);
|
838 |
|
|
static const int digits10 = __glibcxx_digits10 (unsigned long);
|
839 |
|
|
static const bool is_signed = false;
|
840 |
|
|
static const bool is_integer = true;
|
841 |
|
|
static const bool is_exact = true;
|
842 |
|
|
static const int radix = 2;
|
843 |
|
|
static unsigned long epsilon() throw()
|
844 |
|
|
{ return 0; }
|
845 |
|
|
static unsigned long round_error() throw()
|
846 |
|
|
{ return 0; }
|
847 |
|
|
|
848 |
|
|
static const int min_exponent = 0;
|
849 |
|
|
static const int min_exponent10 = 0;
|
850 |
|
|
static const int max_exponent = 0;
|
851 |
|
|
static const int max_exponent10 = 0;
|
852 |
|
|
|
853 |
|
|
static const bool has_infinity = false;
|
854 |
|
|
static const bool has_quiet_NaN = false;
|
855 |
|
|
static const bool has_signaling_NaN = false;
|
856 |
|
|
static const float_denorm_style has_denorm = denorm_absent;
|
857 |
|
|
static const bool has_denorm_loss = false;
|
858 |
|
|
|
859 |
|
|
static unsigned long infinity() throw()
|
860 |
|
|
{ return static_cast<unsigned long>(0); }
|
861 |
|
|
static unsigned long quiet_NaN() throw()
|
862 |
|
|
{ return static_cast<unsigned long>(0); }
|
863 |
|
|
static unsigned long signaling_NaN() throw()
|
864 |
|
|
{ return static_cast<unsigned long>(0); }
|
865 |
|
|
static unsigned long denorm_min() throw()
|
866 |
|
|
{ return static_cast<unsigned long>(0); }
|
867 |
|
|
|
868 |
|
|
static const bool is_iec559 = false;
|
869 |
|
|
static const bool is_bounded = true;
|
870 |
|
|
static const bool is_modulo = true;
|
871 |
|
|
|
872 |
|
|
static const bool traps = __glibcxx_integral_traps;
|
873 |
|
|
static const bool tinyness_before = false;
|
874 |
|
|
static const float_round_style round_style = round_toward_zero;
|
875 |
|
|
};
|
876 |
|
|
|
877 |
|
|
/// numeric_limits<long long> specialization.
|
878 |
|
|
template<>
|
879 |
|
|
struct numeric_limits<long long>
|
880 |
|
|
{
|
881 |
|
|
static const bool is_specialized = true;
|
882 |
|
|
|
883 |
|
|
static long long min() throw()
|
884 |
|
|
{ return -__LONG_LONG_MAX__ - 1; }
|
885 |
|
|
static long long max() throw()
|
886 |
|
|
{ return __LONG_LONG_MAX__; }
|
887 |
|
|
|
888 |
|
|
static const int digits = __glibcxx_digits (long long);
|
889 |
|
|
static const int digits10 = __glibcxx_digits10 (long long);
|
890 |
|
|
static const bool is_signed = true;
|
891 |
|
|
static const bool is_integer = true;
|
892 |
|
|
static const bool is_exact = true;
|
893 |
|
|
static const int radix = 2;
|
894 |
|
|
static long long epsilon() throw()
|
895 |
|
|
{ return 0; }
|
896 |
|
|
static long long round_error() throw()
|
897 |
|
|
{ return 0; }
|
898 |
|
|
|
899 |
|
|
static const int min_exponent = 0;
|
900 |
|
|
static const int min_exponent10 = 0;
|
901 |
|
|
static const int max_exponent = 0;
|
902 |
|
|
static const int max_exponent10 = 0;
|
903 |
|
|
|
904 |
|
|
static const bool has_infinity = false;
|
905 |
|
|
static const bool has_quiet_NaN = false;
|
906 |
|
|
static const bool has_signaling_NaN = false;
|
907 |
|
|
static const float_denorm_style has_denorm = denorm_absent;
|
908 |
|
|
static const bool has_denorm_loss = false;
|
909 |
|
|
|
910 |
|
|
static long long infinity() throw()
|
911 |
|
|
{ return static_cast<long long>(0); }
|
912 |
|
|
static long long quiet_NaN() throw()
|
913 |
|
|
{ return static_cast<long long>(0); }
|
914 |
|
|
static long long signaling_NaN() throw()
|
915 |
|
|
{ return static_cast<long long>(0); }
|
916 |
|
|
static long long denorm_min() throw()
|
917 |
|
|
{ return static_cast<long long>(0); }
|
918 |
|
|
|
919 |
|
|
static const bool is_iec559 = false;
|
920 |
|
|
static const bool is_bounded = true;
|
921 |
|
|
static const bool is_modulo = true;
|
922 |
|
|
|
923 |
|
|
static const bool traps = __glibcxx_integral_traps;
|
924 |
|
|
static const bool tinyness_before = false;
|
925 |
|
|
static const float_round_style round_style = round_toward_zero;
|
926 |
|
|
};
|
927 |
|
|
|
928 |
|
|
/// numeric_limits<unsigned long long> specialization.
|
929 |
|
|
template<>
|
930 |
|
|
struct numeric_limits<unsigned long long>
|
931 |
|
|
{
|
932 |
|
|
static const bool is_specialized = true;
|
933 |
|
|
|
934 |
|
|
static unsigned long long min() throw()
|
935 |
|
|
{ return 0; }
|
936 |
|
|
static unsigned long long max() throw()
|
937 |
|
|
{ return __LONG_LONG_MAX__ * 2ULL + 1; }
|
938 |
|
|
|
939 |
|
|
static const int digits = __glibcxx_digits (unsigned long long);
|
940 |
|
|
static const int digits10 = __glibcxx_digits10 (unsigned long long);
|
941 |
|
|
static const bool is_signed = false;
|
942 |
|
|
static const bool is_integer = true;
|
943 |
|
|
static const bool is_exact = true;
|
944 |
|
|
static const int radix = 2;
|
945 |
|
|
static unsigned long long epsilon() throw()
|
946 |
|
|
{ return 0; }
|
947 |
|
|
static unsigned long long round_error() throw()
|
948 |
|
|
{ return 0; }
|
949 |
|
|
|
950 |
|
|
static const int min_exponent = 0;
|
951 |
|
|
static const int min_exponent10 = 0;
|
952 |
|
|
static const int max_exponent = 0;
|
953 |
|
|
static const int max_exponent10 = 0;
|
954 |
|
|
|
955 |
|
|
static const bool has_infinity = false;
|
956 |
|
|
static const bool has_quiet_NaN = false;
|
957 |
|
|
static const bool has_signaling_NaN = false;
|
958 |
|
|
static const float_denorm_style has_denorm = denorm_absent;
|
959 |
|
|
static const bool has_denorm_loss = false;
|
960 |
|
|
|
961 |
|
|
static unsigned long long infinity() throw()
|
962 |
|
|
{ return static_cast<unsigned long long>(0); }
|
963 |
|
|
static unsigned long long quiet_NaN() throw()
|
964 |
|
|
{ return static_cast<unsigned long long>(0); }
|
965 |
|
|
static unsigned long long signaling_NaN() throw()
|
966 |
|
|
{ return static_cast<unsigned long long>(0); }
|
967 |
|
|
static unsigned long long denorm_min() throw()
|
968 |
|
|
{ return static_cast<unsigned long long>(0); }
|
969 |
|
|
|
970 |
|
|
static const bool is_iec559 = false;
|
971 |
|
|
static const bool is_bounded = true;
|
972 |
|
|
static const bool is_modulo = true;
|
973 |
|
|
|
974 |
|
|
static const bool traps = __glibcxx_integral_traps;
|
975 |
|
|
static const bool tinyness_before = false;
|
976 |
|
|
static const float_round_style round_style = round_toward_zero;
|
977 |
|
|
};
|
978 |
|
|
|
979 |
|
|
/// numeric_limits<float> specialization.
|
980 |
|
|
template<>
|
981 |
|
|
struct numeric_limits<float>
|
982 |
|
|
{
|
983 |
|
|
static const bool is_specialized = true;
|
984 |
|
|
|
985 |
|
|
static float min() throw()
|
986 |
|
|
{ return __FLT_MIN__; }
|
987 |
|
|
static float max() throw()
|
988 |
|
|
{ return __FLT_MAX__; }
|
989 |
|
|
|
990 |
|
|
static const int digits = __FLT_MANT_DIG__;
|
991 |
|
|
static const int digits10 = __FLT_DIG__;
|
992 |
|
|
static const bool is_signed = true;
|
993 |
|
|
static const bool is_integer = false;
|
994 |
|
|
static const bool is_exact = false;
|
995 |
|
|
static const int radix = __FLT_RADIX__;
|
996 |
|
|
static float epsilon() throw()
|
997 |
|
|
{ return __FLT_EPSILON__; }
|
998 |
|
|
static float round_error() throw()
|
999 |
|
|
{ return 0.5F; }
|
1000 |
|
|
|
1001 |
|
|
static const int min_exponent = __FLT_MIN_EXP__;
|
1002 |
|
|
static const int min_exponent10 = __FLT_MIN_10_EXP__;
|
1003 |
|
|
static const int max_exponent = __FLT_MAX_EXP__;
|
1004 |
|
|
static const int max_exponent10 = __FLT_MAX_10_EXP__;
|
1005 |
|
|
|
1006 |
|
|
static const bool has_infinity = __FLT_HAS_INFINITY__;
|
1007 |
|
|
static const bool has_quiet_NaN = __FLT_HAS_QUIET_NAN__;
|
1008 |
|
|
static const bool has_signaling_NaN = has_quiet_NaN;
|
1009 |
|
|
static const float_denorm_style has_denorm
|
1010 |
|
|
= bool(__FLT_DENORM_MIN__) ? denorm_present : denorm_absent;
|
1011 |
|
|
static const bool has_denorm_loss = __glibcxx_float_has_denorm_loss;
|
1012 |
|
|
|
1013 |
|
|
static float infinity() throw()
|
1014 |
|
|
{ return __builtin_huge_valf (); }
|
1015 |
|
|
static float quiet_NaN() throw()
|
1016 |
|
|
{ return __builtin_nanf (""); }
|
1017 |
|
|
static float signaling_NaN() throw()
|
1018 |
|
|
{ return __builtin_nansf (""); }
|
1019 |
|
|
static float denorm_min() throw()
|
1020 |
|
|
{ return __FLT_DENORM_MIN__; }
|
1021 |
|
|
|
1022 |
|
|
static const bool is_iec559
|
1023 |
|
|
= has_infinity && has_quiet_NaN && has_denorm == denorm_present;
|
1024 |
|
|
static const bool is_bounded = true;
|
1025 |
|
|
static const bool is_modulo = false;
|
1026 |
|
|
|
1027 |
|
|
static const bool traps = __glibcxx_float_traps;
|
1028 |
|
|
static const bool tinyness_before = __glibcxx_float_tinyness_before;
|
1029 |
|
|
static const float_round_style round_style = round_to_nearest;
|
1030 |
|
|
};
|
1031 |
|
|
|
1032 |
|
|
#undef __glibcxx_float_has_denorm_loss
|
1033 |
|
|
#undef __glibcxx_float_traps
|
1034 |
|
|
#undef __glibcxx_float_tinyness_before
|
1035 |
|
|
|
1036 |
|
|
/// numeric_limits<double> specialization.
|
1037 |
|
|
template<>
|
1038 |
|
|
struct numeric_limits<double>
|
1039 |
|
|
{
|
1040 |
|
|
static const bool is_specialized = true;
|
1041 |
|
|
|
1042 |
|
|
static double min() throw()
|
1043 |
|
|
{ return __DBL_MIN__; }
|
1044 |
|
|
static double max() throw()
|
1045 |
|
|
{ return __DBL_MAX__; }
|
1046 |
|
|
|
1047 |
|
|
static const int digits = __DBL_MANT_DIG__;
|
1048 |
|
|
static const int digits10 = __DBL_DIG__;
|
1049 |
|
|
static const bool is_signed = true;
|
1050 |
|
|
static const bool is_integer = false;
|
1051 |
|
|
static const bool is_exact = false;
|
1052 |
|
|
static const int radix = __FLT_RADIX__;
|
1053 |
|
|
static double epsilon() throw()
|
1054 |
|
|
{ return __DBL_EPSILON__; }
|
1055 |
|
|
static double round_error() throw()
|
1056 |
|
|
{ return 0.5; }
|
1057 |
|
|
|
1058 |
|
|
static const int min_exponent = __DBL_MIN_EXP__;
|
1059 |
|
|
static const int min_exponent10 = __DBL_MIN_10_EXP__;
|
1060 |
|
|
static const int max_exponent = __DBL_MAX_EXP__;
|
1061 |
|
|
static const int max_exponent10 = __DBL_MAX_10_EXP__;
|
1062 |
|
|
|
1063 |
|
|
static const bool has_infinity = __DBL_HAS_INFINITY__;
|
1064 |
|
|
static const bool has_quiet_NaN = __DBL_HAS_QUIET_NAN__;
|
1065 |
|
|
static const bool has_signaling_NaN = has_quiet_NaN;
|
1066 |
|
|
static const float_denorm_style has_denorm
|
1067 |
|
|
= bool(__DBL_DENORM_MIN__) ? denorm_present : denorm_absent;
|
1068 |
|
|
static const bool has_denorm_loss = __glibcxx_double_has_denorm_loss;
|
1069 |
|
|
|
1070 |
|
|
static double infinity() throw()
|
1071 |
|
|
{ return __builtin_huge_val(); }
|
1072 |
|
|
static double quiet_NaN() throw()
|
1073 |
|
|
{ return __builtin_nan (""); }
|
1074 |
|
|
static double signaling_NaN() throw()
|
1075 |
|
|
{ return __builtin_nans (""); }
|
1076 |
|
|
static double denorm_min() throw()
|
1077 |
|
|
{ return __DBL_DENORM_MIN__; }
|
1078 |
|
|
|
1079 |
|
|
static const bool is_iec559
|
1080 |
|
|
= has_infinity && has_quiet_NaN && has_denorm == denorm_present;
|
1081 |
|
|
static const bool is_bounded = true;
|
1082 |
|
|
static const bool is_modulo = false;
|
1083 |
|
|
|
1084 |
|
|
static const bool traps = __glibcxx_double_traps;
|
1085 |
|
|
static const bool tinyness_before = __glibcxx_double_tinyness_before;
|
1086 |
|
|
static const float_round_style round_style = round_to_nearest;
|
1087 |
|
|
};
|
1088 |
|
|
|
1089 |
|
|
#undef __glibcxx_double_has_denorm_loss
|
1090 |
|
|
#undef __glibcxx_double_traps
|
1091 |
|
|
#undef __glibcxx_double_tinyness_before
|
1092 |
|
|
|
1093 |
|
|
/// numeric_limits<long double> specialization.
|
1094 |
|
|
template<>
|
1095 |
|
|
struct numeric_limits<long double>
|
1096 |
|
|
{
|
1097 |
|
|
static const bool is_specialized = true;
|
1098 |
|
|
|
1099 |
|
|
static long double min() throw()
|
1100 |
|
|
{ return __LDBL_MIN__; }
|
1101 |
|
|
static long double max() throw()
|
1102 |
|
|
{ return __LDBL_MAX__; }
|
1103 |
|
|
|
1104 |
|
|
static const int digits = __LDBL_MANT_DIG__;
|
1105 |
|
|
static const int digits10 = __LDBL_DIG__;
|
1106 |
|
|
static const bool is_signed = true;
|
1107 |
|
|
static const bool is_integer = false;
|
1108 |
|
|
static const bool is_exact = false;
|
1109 |
|
|
static const int radix = __FLT_RADIX__;
|
1110 |
|
|
static long double epsilon() throw()
|
1111 |
|
|
{ return __LDBL_EPSILON__; }
|
1112 |
|
|
static long double round_error() throw()
|
1113 |
|
|
{ return 0.5L; }
|
1114 |
|
|
|
1115 |
|
|
static const int min_exponent = __LDBL_MIN_EXP__;
|
1116 |
|
|
static const int min_exponent10 = __LDBL_MIN_10_EXP__;
|
1117 |
|
|
static const int max_exponent = __LDBL_MAX_EXP__;
|
1118 |
|
|
static const int max_exponent10 = __LDBL_MAX_10_EXP__;
|
1119 |
|
|
|
1120 |
|
|
static const bool has_infinity = __LDBL_HAS_INFINITY__;
|
1121 |
|
|
static const bool has_quiet_NaN = __LDBL_HAS_QUIET_NAN__;
|
1122 |
|
|
static const bool has_signaling_NaN = has_quiet_NaN;
|
1123 |
|
|
static const float_denorm_style has_denorm
|
1124 |
|
|
= bool(__LDBL_DENORM_MIN__) ? denorm_present : denorm_absent;
|
1125 |
|
|
static const bool has_denorm_loss
|
1126 |
|
|
= __glibcxx_long_double_has_denorm_loss;
|
1127 |
|
|
|
1128 |
|
|
static long double infinity() throw()
|
1129 |
|
|
{ return __builtin_huge_vall (); }
|
1130 |
|
|
static long double quiet_NaN() throw()
|
1131 |
|
|
{ return __builtin_nanl (""); }
|
1132 |
|
|
static long double signaling_NaN() throw()
|
1133 |
|
|
{ return __builtin_nansl (""); }
|
1134 |
|
|
static long double denorm_min() throw()
|
1135 |
|
|
{ return __LDBL_DENORM_MIN__; }
|
1136 |
|
|
|
1137 |
|
|
static const bool is_iec559
|
1138 |
|
|
= has_infinity && has_quiet_NaN && has_denorm == denorm_present;
|
1139 |
|
|
static const bool is_bounded = true;
|
1140 |
|
|
static const bool is_modulo = false;
|
1141 |
|
|
|
1142 |
|
|
static const bool traps = __glibcxx_long_double_traps;
|
1143 |
|
|
static const bool tinyness_before = __glibcxx_long_double_tinyness_before;
|
1144 |
|
|
static const float_round_style round_style = round_to_nearest;
|
1145 |
|
|
};
|
1146 |
|
|
|
1147 |
|
|
#undef __glibcxx_long_double_has_denorm_loss
|
1148 |
|
|
#undef __glibcxx_long_double_traps
|
1149 |
|
|
#undef __glibcxx_long_double_tinyness_before
|
1150 |
|
|
|
1151 |
|
|
} // namespace std
|
1152 |
|
|
|
1153 |
|
|
#undef __glibcxx_signed
|
1154 |
|
|
#undef __glibcxx_min
|
1155 |
|
|
#undef __glibcxx_max
|
1156 |
|
|
#undef __glibcxx_digits
|
1157 |
|
|
#undef __glibcxx_digits10
|
1158 |
|
|
|
1159 |
|
|
#endif // _GLIBCXX_NUMERIC_LIMITS
|