1 //===----------------------------------------------------------------------===//
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 <__locale>
10 #include <__std_stream>
11 #include <new>
12 #include <string>
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 _ALIGNAS_TYPE (istream) _LIBCPP_FUNC_VIS char cin[sizeof(istream)]
21 #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
22 __asm__("?cin@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_istream@DU?$char_traits@D@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
23 #endif
24 ;
25 _ALIGNAS_TYPE (__stdinbuf<char> ) static char __cin[sizeof(__stdinbuf <char>)];
26 static mbstate_t mb_cin;
27 
28 #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
29 _ALIGNAS_TYPE (wistream) _LIBCPP_FUNC_VIS char wcin[sizeof(wistream)]
30 #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
31 __asm__("?wcin@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_istream@_WU?$char_traits@_W@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
32 #endif
33 ;
34 _ALIGNAS_TYPE (__stdinbuf<wchar_t> ) static char __wcin[sizeof(__stdinbuf <wchar_t>)];
35 static mbstate_t mb_wcin;
36 #endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
37 
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 
46 #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
47 _ALIGNAS_TYPE (wostream) _LIBCPP_FUNC_VIS char wcout[sizeof(wostream)]
48 #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
49 __asm__("?wcout@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@_WU?$char_traits@_W@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
50 #endif
51 ;
52 _ALIGNAS_TYPE (__stdoutbuf<wchar_t>) static char __wcout[sizeof(__stdoutbuf<wchar_t>)];
53 static mbstate_t mb_wcout;
54 #endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
55 
56 _ALIGNAS_TYPE (ostream) _LIBCPP_FUNC_VIS char cerr[sizeof(ostream)]
57 #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
58 __asm__("?cerr@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@DU?$char_traits@D@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
59 #endif
60 ;
61 _ALIGNAS_TYPE (__stdoutbuf<char>) static char __cerr[sizeof(__stdoutbuf<char>)];
62 static mbstate_t mb_cerr;
63 
64 #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
65 _ALIGNAS_TYPE (wostream) _LIBCPP_FUNC_VIS char wcerr[sizeof(wostream)]
66 #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
67 __asm__("?wcerr@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@_WU?$char_traits@_W@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
68 #endif
69 ;
70 _ALIGNAS_TYPE (__stdoutbuf<wchar_t>) static char __wcerr[sizeof(__stdoutbuf<wchar_t>)];
71 static mbstate_t mb_wcerr;
72 #endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
73 
74 _ALIGNAS_TYPE (ostream) _LIBCPP_FUNC_VIS char clog[sizeof(ostream)]
75 #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
76 __asm__("?clog@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@DU?$char_traits@D@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
77 #endif
78 ;
79 
80 #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
81 _ALIGNAS_TYPE (wostream) _LIBCPP_FUNC_VIS char wclog[sizeof(wostream)]
82 #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
83 __asm__("?wclog@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@_WU?$char_traits@_W@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
84 #endif
85 ;
86 #endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
87 
88 // Pretend we're inside a system header so the compiler doesn't flag the use of the init_priority
89 // attribute with a value that's reserved for the implementation (we're the implementation).
90 #include "iostream_init.h"
91 
92 // On Windows the TLS storage for locales needs to be initialized before we create
93 // the standard streams, otherwise it may not be alive during program termination
94 // when we flush the streams.
95 static void force_locale_initialization() {
96 #if defined(_LIBCPP_MSVCRT_LIKE)
97   static bool once = []() {
98     auto loc = newlocale(LC_ALL_MASK, "C", 0);
99     {
100         __libcpp_locale_guard g(loc); // forces initialization of locale TLS
101         ((void)g);
102     }
103     freelocale(loc);
104     return true;
105   }();
106   ((void)once);
107 #endif
108 }
109 
110 class DoIOSInit {
111 public:
112 	DoIOSInit();
113 	~DoIOSInit();
114 };
115 
116 DoIOSInit::DoIOSInit()
117 {
118     force_locale_initialization();
119 
120     istream* cin_ptr  = ::new(cin)  istream(::new(__cin)  __stdinbuf <char>(stdin, &mb_cin));
121     ostream* cout_ptr = ::new(cout) ostream(::new(__cout) __stdoutbuf<char>(stdout, &mb_cout));
122     ostream* cerr_ptr = ::new(cerr) ostream(::new(__cerr) __stdoutbuf<char>(stderr, &mb_cerr));
123                         ::new(clog) ostream(cerr_ptr->rdbuf());
124     cin_ptr->tie(cout_ptr);
125     _VSTD::unitbuf(*cerr_ptr);
126     cerr_ptr->tie(cout_ptr);
127 
128 #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
129     wistream* wcin_ptr  = ::new(wcin)  wistream(::new(__wcin)  __stdinbuf <wchar_t>(stdin, &mb_wcin));
130     wostream* wcout_ptr = ::new(wcout) wostream(::new(__wcout) __stdoutbuf<wchar_t>(stdout, &mb_wcout));
131     wostream* wcerr_ptr = ::new(wcerr) wostream(::new(__wcerr) __stdoutbuf<wchar_t>(stderr, &mb_wcerr));
132                           ::new(wclog) wostream(wcerr_ptr->rdbuf());
133 
134     wcin_ptr->tie(wcout_ptr);
135     _VSTD::unitbuf(*wcerr_ptr);
136     wcerr_ptr->tie(wcout_ptr);
137 #endif
138 }
139 
140 DoIOSInit::~DoIOSInit()
141 {
142     ostream* cout_ptr = reinterpret_cast<ostream*>(cout);
143     cout_ptr->flush();
144     ostream* clog_ptr = reinterpret_cast<ostream*>(clog);
145     clog_ptr->flush();
146 
147 #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
148     wostream* wcout_ptr = reinterpret_cast<wostream*>(wcout);
149     wcout_ptr->flush();
150     wostream* wclog_ptr = reinterpret_cast<wostream*>(wclog);
151     wclog_ptr->flush();
152 #endif
153 }
154 
155 ios_base::Init::Init()
156 {
157     static DoIOSInit init_the_streams; // gets initialized once
158 }
159 
160 ios_base::Init::~Init()
161 {
162 }
163 
164 _LIBCPP_END_NAMESPACE_STD
165