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// -*- C++ -*- C library enhancements header. |
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|
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// Copyright (C) 2016-2021 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 3, or (at your option) |
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// any later version. |
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|
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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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|
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// Under Section 7 of GPL version 3, you are granted additional |
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// permissions described in the GCC Runtime Library Exception, version |
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// 3.1, as published by the Free Software Foundation. |
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|
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// You should have received a copy of the GNU General Public License and |
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// a copy of the GCC Runtime Library Exception along with this program; |
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
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// <http://www.gnu.org/licenses/>. |
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|
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/** @file include/bits/std_abs.h |
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* This is an internal header file, included by other library headers. |
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* Do not attempt to use it directly. @headername{cmath, cstdlib} |
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*/ |
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|
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#ifndef _GLIBCXX_BITS_STD_ABS_H |
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#define _GLIBCXX_BITS_STD_ABS_H |
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|
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#pragma GCC system_header |
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|
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#include <bits/c++config.h> |
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|
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#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS |
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#include_next <stdlib.h> |
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#ifdef __CORRECT_ISO_CPP_MATH_H_PROTO |
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# include_next <math.h> |
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#endif |
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#undef _GLIBCXX_INCLUDE_NEXT_C_HEADERS |
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|
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#undef abs |
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|
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extern "C++" |
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{ |
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namespace std _GLIBCXX_VISIBILITY(default) |
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{ |
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_GLIBCXX_BEGIN_NAMESPACE_VERSION |
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|
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using ::abs; |
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|
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#ifndef __CORRECT_ISO_CPP_STDLIB_H_PROTO |
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inline long |
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abs(long __i) { return __builtin_labs(__i); } |
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#endif |
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|
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#ifdef _GLIBCXX_USE_LONG_LONG |
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inline long long |
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abs(long long __x) { return __builtin_llabs (__x); } |
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#endif |
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|
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// _GLIBCXX_RESOLVE_LIB_DEFECTS |
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// 2192. Validity and return type of std::abs(0u) is unclear |
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// 2294. <cstdlib> should declare abs(double) |
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// 2735. std::abs(short), std::abs(signed char) and others should return int |
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|
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#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO |
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inline _GLIBCXX_CONSTEXPR double |
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abs(double __x) |
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{ return __builtin_fabs(__x); } |
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|
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inline _GLIBCXX_CONSTEXPR float |
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abs(float __x) |
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{ return __builtin_fabsf(__x); } |
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|
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inline _GLIBCXX_CONSTEXPR long double |
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abs(long double __x) |
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{ return __builtin_fabsl(__x); } |
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#endif |
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|
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#if defined(__GLIBCXX_TYPE_INT_N_0) |
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inline _GLIBCXX_CONSTEXPR __GLIBCXX_TYPE_INT_N_0 |
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abs(__GLIBCXX_TYPE_INT_N_0 __x) { return __x >= 0 ? __x : -__x; } |
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#endif |
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#if defined(__GLIBCXX_TYPE_INT_N_1) |
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inline _GLIBCXX_CONSTEXPR __GLIBCXX_TYPE_INT_N_1 |
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abs(__GLIBCXX_TYPE_INT_N_1 __x) { return __x >= 0 ? __x : -__x; } |
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#endif |
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#if defined(__GLIBCXX_TYPE_INT_N_2) |
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inline _GLIBCXX_CONSTEXPR __GLIBCXX_TYPE_INT_N_2 |
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abs(__GLIBCXX_TYPE_INT_N_2 __x) { return __x >= 0 ? __x : -__x; } |
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#endif |
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#if defined(__GLIBCXX_TYPE_INT_N_3) |
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inline _GLIBCXX_CONSTEXPR __GLIBCXX_TYPE_INT_N_3 |
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abs(__GLIBCXX_TYPE_INT_N_3 __x) { return __x >= 0 ? __x : -__x; } |
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#endif |
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|
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#if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128) |
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inline _GLIBCXX_CONSTEXPR |
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__float128 |
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abs(__float128 __x) |
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{ return __x < 0 ? -__x : __x; } |
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#endif |
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|
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_GLIBCXX_END_NAMESPACE_VERSION |
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} // namespace |
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} // extern "C"++" |
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|
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#endif // _GLIBCXX_BITS_STD_ABS_H |
