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// Reference-counted COW string instantiations -*- C++ -*-
// Copyright (C) 2014-2015 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"
#include <istream>
#include <ostream>
#if ! _GLIBCXX_USE_DUAL_ABI
# error This file should not be compiled for this configuration.
#endif
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
// These came from c++98/misc-inst.cc, repeat them for COW string
// string related to iostreams.
template
basic_istream<char>&
operator>>(basic_istream<char>&, string&);
template
basic_ostream<char>&
operator<<(basic_ostream<char>&, const string&);
template
basic_istream<char>&
getline(basic_istream<char>&, string&, char);
template
basic_istream<char>&
getline(basic_istream<char>&, string&);
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
#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
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