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