1//===------------------------ iostream.cpp --------------------------------===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8 9#include "__std_stream" 10#include "__locale" 11#include "string" 12#include "new" 13 14#define _str(s) #s 15#define str(s) _str(s) 16#define _LIBCPP_ABI_NAMESPACE_STR str(_LIBCPP_ABI_NAMESPACE) 17 18_LIBCPP_BEGIN_NAMESPACE_STD 19 20#ifndef _LIBCPP_HAS_NO_STDIN 21_ALIGNAS_TYPE (istream) _LIBCPP_FUNC_VIS char cin[sizeof(istream)] 22#if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__) 23__asm__("?cin@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_istream@DU?$char_traits@D@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A") 24#endif 25; 26_ALIGNAS_TYPE (__stdinbuf<char> ) static char __cin[sizeof(__stdinbuf <char>)]; 27static mbstate_t mb_cin; 28_ALIGNAS_TYPE (wistream) _LIBCPP_FUNC_VIS char wcin[sizeof(wistream)] 29#if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__) 30__asm__("?wcin@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_istream@_WU?$char_traits@_W@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A") 31#endif 32; 33_ALIGNAS_TYPE (__stdinbuf<wchar_t> ) static char __wcin[sizeof(__stdinbuf <wchar_t>)]; 34static mbstate_t mb_wcin; 35#endif 36 37#ifndef _LIBCPP_HAS_NO_STDOUT 38_ALIGNAS_TYPE (ostream) _LIBCPP_FUNC_VIS char cout[sizeof(ostream)] 39#if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__) 40__asm__("?cout@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@DU?$char_traits@D@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A") 41#endif 42; 43_ALIGNAS_TYPE (__stdoutbuf<char>) static char __cout[sizeof(__stdoutbuf<char>)]; 44static mbstate_t mb_cout; 45_ALIGNAS_TYPE (wostream) _LIBCPP_FUNC_VIS char wcout[sizeof(wostream)] 46#if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__) 47__asm__("?wcout@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@_WU?$char_traits@_W@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A") 48#endif 49; 50_ALIGNAS_TYPE (__stdoutbuf<wchar_t>) static char __wcout[sizeof(__stdoutbuf<wchar_t>)]; 51static mbstate_t mb_wcout; 52#endif 53 54_ALIGNAS_TYPE (ostream) _LIBCPP_FUNC_VIS char cerr[sizeof(ostream)] 55#if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__) 56__asm__("?cerr@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@DU?$char_traits@D@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A") 57#endif 58; 59_ALIGNAS_TYPE (__stdoutbuf<char>) static char __cerr[sizeof(__stdoutbuf<char>)]; 60static mbstate_t mb_cerr; 61_ALIGNAS_TYPE (wostream) _LIBCPP_FUNC_VIS char wcerr[sizeof(wostream)] 62#if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__) 63__asm__("?wcerr@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@_WU?$char_traits@_W@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A") 64#endif 65; 66_ALIGNAS_TYPE (__stdoutbuf<wchar_t>) static char __wcerr[sizeof(__stdoutbuf<wchar_t>)]; 67static mbstate_t mb_wcerr; 68 69_ALIGNAS_TYPE (ostream) _LIBCPP_FUNC_VIS char clog[sizeof(ostream)] 70#if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__) 71__asm__("?clog@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@DU?$char_traits@D@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A") 72#endif 73; 74_ALIGNAS_TYPE (wostream) _LIBCPP_FUNC_VIS char wclog[sizeof(wostream)] 75#if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__) 76__asm__("?wclog@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@_WU?$char_traits@_W@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A") 77#endif 78; 79 80_LIBCPP_HIDDEN ios_base::Init __start_std_streams; 81 82// On Windows the TLS storage for locales needs to be initialized before we create 83// the standard streams, otherwise it may not be alive during program termination 84// when we flush the streams. 85static void force_locale_initialization() { 86#if defined(_LIBCPP_MSVCRT_LIKE) 87 static bool once = []() { 88 auto loc = newlocale(LC_ALL_MASK, "C", 0); 89 { 90 __libcpp_locale_guard g(loc); // forces initialization of locale TLS 91 ((void)g); 92 } 93 freelocale(loc); 94 return true; 95 }(); 96 ((void)once); 97#endif 98} 99 100class DoIOSInit { 101public: 102 DoIOSInit(); 103 ~DoIOSInit(); 104}; 105 106DoIOSInit::DoIOSInit() 107{ 108 force_locale_initialization(); 109 110#ifndef _LIBCPP_HAS_NO_STDIN 111 istream* cin_ptr = ::new(cin) istream(::new(__cin) __stdinbuf <char>(stdin, &mb_cin)); 112 wistream* wcin_ptr = ::new(wcin) wistream(::new(__wcin) __stdinbuf <wchar_t>(stdin, &mb_wcin)); 113#endif 114#ifndef _LIBCPP_HAS_NO_STDOUT 115 ostream* cout_ptr = ::new(cout) ostream(::new(__cout) __stdoutbuf<char>(stdout, &mb_cout)); 116 wostream* wcout_ptr = ::new(wcout) wostream(::new(__wcout) __stdoutbuf<wchar_t>(stdout, &mb_wcout)); 117#endif 118 ostream* cerr_ptr = ::new(cerr) ostream(::new(__cerr) __stdoutbuf<char>(stderr, &mb_cerr)); 119 ::new(clog) ostream(cerr_ptr->rdbuf()); 120 wostream* wcerr_ptr = ::new(wcerr) wostream(::new(__wcerr) __stdoutbuf<wchar_t>(stderr, &mb_wcerr)); 121 ::new(wclog) wostream(wcerr_ptr->rdbuf()); 122 123#if !defined(_LIBCPP_HAS_NO_STDIN) && !defined(_LIBCPP_HAS_NO_STDOUT) 124 cin_ptr->tie(cout_ptr); 125 wcin_ptr->tie(wcout_ptr); 126#endif 127 _VSTD::unitbuf(*cerr_ptr); 128 _VSTD::unitbuf(*wcerr_ptr); 129#ifndef _LIBCPP_HAS_NO_STDOUT 130 cerr_ptr->tie(cout_ptr); 131 wcerr_ptr->tie(wcout_ptr); 132#endif 133} 134 135DoIOSInit::~DoIOSInit() 136{ 137#ifndef _LIBCPP_HAS_NO_STDOUT 138 ostream* cout_ptr = reinterpret_cast<ostream*>(cout); 139 wostream* wcout_ptr = reinterpret_cast<wostream*>(wcout); 140 cout_ptr->flush(); 141 wcout_ptr->flush(); 142#endif 143 144 ostream* clog_ptr = reinterpret_cast<ostream*>(clog); 145 wostream* wclog_ptr = reinterpret_cast<wostream*>(wclog); 146 clog_ptr->flush(); 147 wclog_ptr->flush(); 148} 149 150ios_base::Init::Init() 151{ 152 static DoIOSInit init_the_streams; // gets initialized once 153} 154 155ios_base::Init::~Init() 156{ 157} 158 159_LIBCPP_END_NAMESPACE_STD 160