Mercurial > hg > CbC > CbC_gcc
view libstdc++-v3/src/c++11/cow-string-inst.cc @ 120:f93fa5091070
fix conv1.c
author | mir3636 |
---|---|
date | Thu, 08 Mar 2018 14:53:42 +0900 |
parents | 04ced10e8804 |
children | 84e7813d76e9 |
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// Reference-counted COW string instantiations -*- C++ -*- // Copyright (C) 2014-2017 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // <http://www.gnu.org/licenses/>. // // ISO C++ 14882: 21 Strings library // #define _GLIBCXX_USE_CXX11_ABI 0 #include "string-inst.cc" #if ! _GLIBCXX_USE_DUAL_ABI # error This file should not be compiled for this configuration. #endif #ifdef _GLIBCXX_USE_C99_STDINT_TR1 #include <random> #if defined __i386__ || defined __x86_64__ # include <cpuid.h> #endif #include <cstdio> namespace std _GLIBCXX_VISIBILITY(default) { void random_device::_M_init(const std::string& token) { const char *fname = token.c_str(); if (token == "default") { #if (defined __i386__ || defined __x86_64__) && defined _GLIBCXX_X86_RDRAND unsigned int eax, ebx, ecx, edx; // Check availability of cpuid and, for now at least, also the // CPU signature for Intel's if (__get_cpuid_max(0, &ebx) > 0 && ebx == signature_INTEL_ebx) { __cpuid(1, eax, ebx, ecx, edx); if (ecx & bit_RDRND) { _M_file = nullptr; return; } } #endif fname = "/dev/urandom"; } else if (token != "/dev/urandom" && token != "/dev/random") fail: std::__throw_runtime_error(__N("random_device::" "random_device(const std::string&)")); _M_file = static_cast<void*>(std::fopen(fname, "rb")); if (!_M_file) goto fail; } void random_device::_M_init_pretr1(const std::string& token) { unsigned long __seed = 5489UL; if (token != "mt19937") { const char* __nptr = token.c_str(); char* __endptr; __seed = std::strtoul(__nptr, &__endptr, 0); if (*__nptr == '\0' || *__endptr != '\0') std::__throw_runtime_error(__N("random_device::random_device" "(const std::string&)")); } _M_mt.seed(__seed); } } // namespace #endif