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>)]; 27 static 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>)]; 34 static 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>)]; 44 static 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>)]; 51 static 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>)]; 60 static 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>)]; 67 static 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. 85 static 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 } 99 100 ios_base::Init::Init() 101 { 102 force_locale_initialization(); 103 104 #ifndef _LIBCPP_HAS_NO_STDIN 105 istream* cin_ptr = ::new(cin) istream(::new(__cin) __stdinbuf <char>(stdin, &mb_cin)); 106 wistream* wcin_ptr = ::new(wcin) wistream(::new(__wcin) __stdinbuf <wchar_t>(stdin, &mb_wcin)); 107 #endif 108 #ifndef _LIBCPP_HAS_NO_STDOUT 109 ostream* cout_ptr = ::new(cout) ostream(::new(__cout) __stdoutbuf<char>(stdout, &mb_cout)); 110 wostream* wcout_ptr = ::new(wcout) wostream(::new(__wcout) __stdoutbuf<wchar_t>(stdout, &mb_wcout)); 111 #endif 112 ostream* cerr_ptr = ::new(cerr) ostream(::new(__cerr) __stdoutbuf<char>(stderr, &mb_cerr)); 113 ::new(clog) ostream(cerr_ptr->rdbuf()); 114 wostream* wcerr_ptr = ::new(wcerr) wostream(::new(__wcerr) __stdoutbuf<wchar_t>(stderr, &mb_wcerr)); 115 ::new(wclog) wostream(wcerr_ptr->rdbuf()); 116 117 #if !defined(_LIBCPP_HAS_NO_STDIN) && !defined(_LIBCPP_HAS_NO_STDOUT) 118 cin_ptr->tie(cout_ptr); 119 wcin_ptr->tie(wcout_ptr); 120 #endif 121 _VSTD::unitbuf(*cerr_ptr); 122 _VSTD::unitbuf(*wcerr_ptr); 123 #ifndef _LIBCPP_HAS_NO_STDOUT 124 cerr_ptr->tie(cout_ptr); 125 wcerr_ptr->tie(wcout_ptr); 126 #endif 127 } 128 129 ios_base::Init::~Init() 130 { 131 #ifndef _LIBCPP_HAS_NO_STDOUT 132 ostream* cout_ptr = reinterpret_cast<ostream*>(cout); 133 wostream* wcout_ptr = reinterpret_cast<wostream*>(wcout); 134 cout_ptr->flush(); 135 wcout_ptr->flush(); 136 #endif 137 138 ostream* clog_ptr = reinterpret_cast<ostream*>(clog); 139 wostream* wclog_ptr = reinterpret_cast<wostream*>(wclog); 140 clog_ptr->flush(); 141 wclog_ptr->flush(); 142 } 143 144 _LIBCPP_END_NAMESPACE_STD 145