xref: /freebsd/contrib/llvm-project/libcxx/src/iostream.cpp (revision 0b57cec536236d46e3dba9bd041533462f33dbb7) 
1*0b57cec5SDimitry Andric //===------------------------ iostream.cpp --------------------------------===//
2*0b57cec5SDimitry Andric //
3*0b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4*0b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information.
5*0b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6*0b57cec5SDimitry Andric //
7*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===//
8*0b57cec5SDimitry Andric 
9*0b57cec5SDimitry Andric #include "__std_stream"
10*0b57cec5SDimitry Andric #include "__locale"
11*0b57cec5SDimitry Andric #include "string"
12*0b57cec5SDimitry Andric #include "new"
13*0b57cec5SDimitry Andric 
14*0b57cec5SDimitry Andric #define _str(s) #s
15*0b57cec5SDimitry Andric #define str(s) _str(s)
16*0b57cec5SDimitry Andric #define _LIBCPP_ABI_NAMESPACE_STR str(_LIBCPP_ABI_NAMESPACE)
17*0b57cec5SDimitry Andric 
18*0b57cec5SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD
19*0b57cec5SDimitry Andric 
20*0b57cec5SDimitry Andric #ifndef _LIBCPP_HAS_NO_STDIN
21*0b57cec5SDimitry Andric _ALIGNAS_TYPE (istream) _LIBCPP_FUNC_VIS char cin[sizeof(istream)]
22*0b57cec5SDimitry Andric #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
23*0b57cec5SDimitry Andric __asm__("?cin@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_istream@DU?$char_traits@D@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
24*0b57cec5SDimitry Andric #endif
25*0b57cec5SDimitry Andric ;
26*0b57cec5SDimitry Andric _ALIGNAS_TYPE (__stdinbuf<char> ) static char __cin[sizeof(__stdinbuf <char>)];
27*0b57cec5SDimitry Andric static mbstate_t mb_cin;
28*0b57cec5SDimitry Andric _ALIGNAS_TYPE (wistream) _LIBCPP_FUNC_VIS char wcin[sizeof(wistream)]
29*0b57cec5SDimitry Andric #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
30*0b57cec5SDimitry Andric __asm__("?wcin@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_istream@_WU?$char_traits@_W@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
31*0b57cec5SDimitry Andric #endif
32*0b57cec5SDimitry Andric ;
33*0b57cec5SDimitry Andric _ALIGNAS_TYPE (__stdinbuf<wchar_t> ) static char __wcin[sizeof(__stdinbuf <wchar_t>)];
34*0b57cec5SDimitry Andric static mbstate_t mb_wcin;
35*0b57cec5SDimitry Andric #endif
36*0b57cec5SDimitry Andric 
37*0b57cec5SDimitry Andric #ifndef _LIBCPP_HAS_NO_STDOUT
38*0b57cec5SDimitry Andric _ALIGNAS_TYPE (ostream) _LIBCPP_FUNC_VIS char cout[sizeof(ostream)]
39*0b57cec5SDimitry Andric #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
40*0b57cec5SDimitry Andric __asm__("?cout@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@DU?$char_traits@D@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
41*0b57cec5SDimitry Andric #endif
42*0b57cec5SDimitry Andric ;
43*0b57cec5SDimitry Andric _ALIGNAS_TYPE (__stdoutbuf<char>) static char __cout[sizeof(__stdoutbuf<char>)];
44*0b57cec5SDimitry Andric static mbstate_t mb_cout;
45*0b57cec5SDimitry Andric _ALIGNAS_TYPE (wostream) _LIBCPP_FUNC_VIS char wcout[sizeof(wostream)]
46*0b57cec5SDimitry Andric #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
47*0b57cec5SDimitry Andric __asm__("?wcout@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@_WU?$char_traits@_W@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
48*0b57cec5SDimitry Andric #endif
49*0b57cec5SDimitry Andric ;
50*0b57cec5SDimitry Andric _ALIGNAS_TYPE (__stdoutbuf<wchar_t>) static char __wcout[sizeof(__stdoutbuf<wchar_t>)];
51*0b57cec5SDimitry Andric static mbstate_t mb_wcout;
52*0b57cec5SDimitry Andric #endif
53*0b57cec5SDimitry Andric 
54*0b57cec5SDimitry Andric _ALIGNAS_TYPE (ostream) _LIBCPP_FUNC_VIS char cerr[sizeof(ostream)]
55*0b57cec5SDimitry Andric #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
56*0b57cec5SDimitry Andric __asm__("?cerr@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@DU?$char_traits@D@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
57*0b57cec5SDimitry Andric #endif
58*0b57cec5SDimitry Andric ;
59*0b57cec5SDimitry Andric _ALIGNAS_TYPE (__stdoutbuf<char>) static char __cerr[sizeof(__stdoutbuf<char>)];
60*0b57cec5SDimitry Andric static mbstate_t mb_cerr;
61*0b57cec5SDimitry Andric _ALIGNAS_TYPE (wostream) _LIBCPP_FUNC_VIS char wcerr[sizeof(wostream)]
62*0b57cec5SDimitry Andric #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
63*0b57cec5SDimitry Andric __asm__("?wcerr@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@_WU?$char_traits@_W@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
64*0b57cec5SDimitry Andric #endif
65*0b57cec5SDimitry Andric ;
66*0b57cec5SDimitry Andric _ALIGNAS_TYPE (__stdoutbuf<wchar_t>) static char __wcerr[sizeof(__stdoutbuf<wchar_t>)];
67*0b57cec5SDimitry Andric static mbstate_t mb_wcerr;
68*0b57cec5SDimitry Andric 
69*0b57cec5SDimitry Andric _ALIGNAS_TYPE (ostream) _LIBCPP_FUNC_VIS char clog[sizeof(ostream)]
70*0b57cec5SDimitry Andric #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
71*0b57cec5SDimitry Andric __asm__("?clog@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@DU?$char_traits@D@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
72*0b57cec5SDimitry Andric #endif
73*0b57cec5SDimitry Andric ;
74*0b57cec5SDimitry Andric _ALIGNAS_TYPE (wostream) _LIBCPP_FUNC_VIS char wclog[sizeof(wostream)]
75*0b57cec5SDimitry Andric #if defined(_LIBCPP_ABI_MICROSOFT) && defined(__clang__)
76*0b57cec5SDimitry Andric __asm__("?wclog@" _LIBCPP_ABI_NAMESPACE_STR "@std@@3V?$basic_ostream@_WU?$char_traits@_W@" _LIBCPP_ABI_NAMESPACE_STR "@std@@@12@A")
77*0b57cec5SDimitry Andric #endif
78*0b57cec5SDimitry Andric ;
79*0b57cec5SDimitry Andric 
80*0b57cec5SDimitry Andric _LIBCPP_HIDDEN ios_base::Init __start_std_streams;
81*0b57cec5SDimitry Andric 
82*0b57cec5SDimitry Andric // On Windows the TLS storage for locales needs to be initialized before we create
83*0b57cec5SDimitry Andric // the standard streams, otherwise it may not be alive during program termination
84*0b57cec5SDimitry Andric // when we flush the streams.
85*0b57cec5SDimitry Andric static void force_locale_initialization() {
86*0b57cec5SDimitry Andric #if defined(_LIBCPP_MSVCRT_LIKE)
87*0b57cec5SDimitry Andric   static bool once = []() {
88*0b57cec5SDimitry Andric     auto loc = newlocale(LC_ALL_MASK, "C", 0);
89*0b57cec5SDimitry Andric     {
90*0b57cec5SDimitry Andric         __libcpp_locale_guard g(loc); // forces initialization of locale TLS
91*0b57cec5SDimitry Andric         ((void)g);
92*0b57cec5SDimitry Andric     }
93*0b57cec5SDimitry Andric     freelocale(loc);
94*0b57cec5SDimitry Andric     return true;
95*0b57cec5SDimitry Andric   }();
96*0b57cec5SDimitry Andric   ((void)once);
97*0b57cec5SDimitry Andric #endif
98*0b57cec5SDimitry Andric }
99*0b57cec5SDimitry Andric 
100*0b57cec5SDimitry Andric ios_base::Init::Init()
101*0b57cec5SDimitry Andric {
102*0b57cec5SDimitry Andric     force_locale_initialization();
103*0b57cec5SDimitry Andric 
104*0b57cec5SDimitry Andric #ifndef _LIBCPP_HAS_NO_STDIN
105*0b57cec5SDimitry Andric     istream* cin_ptr  = ::new(cin)  istream(::new(__cin)  __stdinbuf <char>(stdin, &mb_cin));
106*0b57cec5SDimitry Andric     wistream* wcin_ptr  = ::new(wcin)  wistream(::new(__wcin)  __stdinbuf <wchar_t>(stdin, &mb_wcin));
107*0b57cec5SDimitry Andric #endif
108*0b57cec5SDimitry Andric #ifndef _LIBCPP_HAS_NO_STDOUT
109*0b57cec5SDimitry Andric     ostream* cout_ptr = ::new(cout) ostream(::new(__cout) __stdoutbuf<char>(stdout, &mb_cout));
110*0b57cec5SDimitry Andric     wostream* wcout_ptr = ::new(wcout) wostream(::new(__wcout) __stdoutbuf<wchar_t>(stdout, &mb_wcout));
111*0b57cec5SDimitry Andric #endif
112*0b57cec5SDimitry Andric     ostream* cerr_ptr = ::new(cerr) ostream(::new(__cerr) __stdoutbuf<char>(stderr, &mb_cerr));
113*0b57cec5SDimitry Andric                         ::new(clog) ostream(cerr_ptr->rdbuf());
114*0b57cec5SDimitry Andric     wostream* wcerr_ptr = ::new(wcerr) wostream(::new(__wcerr) __stdoutbuf<wchar_t>(stderr, &mb_wcerr));
115*0b57cec5SDimitry Andric                           ::new(wclog) wostream(wcerr_ptr->rdbuf());
116*0b57cec5SDimitry Andric 
117*0b57cec5SDimitry Andric #if !defined(_LIBCPP_HAS_NO_STDIN) && !defined(_LIBCPP_HAS_NO_STDOUT)
118*0b57cec5SDimitry Andric     cin_ptr->tie(cout_ptr);
119*0b57cec5SDimitry Andric     wcin_ptr->tie(wcout_ptr);
120*0b57cec5SDimitry Andric #endif
121*0b57cec5SDimitry Andric     _VSTD::unitbuf(*cerr_ptr);
122*0b57cec5SDimitry Andric     _VSTD::unitbuf(*wcerr_ptr);
123*0b57cec5SDimitry Andric #ifndef _LIBCPP_HAS_NO_STDOUT
124*0b57cec5SDimitry Andric     cerr_ptr->tie(cout_ptr);
125*0b57cec5SDimitry Andric     wcerr_ptr->tie(wcout_ptr);
126*0b57cec5SDimitry Andric #endif
127*0b57cec5SDimitry Andric }
128*0b57cec5SDimitry Andric 
129*0b57cec5SDimitry Andric ios_base::Init::~Init()
130*0b57cec5SDimitry Andric {
131*0b57cec5SDimitry Andric #ifndef _LIBCPP_HAS_NO_STDOUT
132*0b57cec5SDimitry Andric     ostream* cout_ptr = reinterpret_cast<ostream*>(cout);
133*0b57cec5SDimitry Andric     wostream* wcout_ptr = reinterpret_cast<wostream*>(wcout);
134*0b57cec5SDimitry Andric     cout_ptr->flush();
135*0b57cec5SDimitry Andric     wcout_ptr->flush();
136*0b57cec5SDimitry Andric #endif
137*0b57cec5SDimitry Andric 
138*0b57cec5SDimitry Andric     ostream* clog_ptr = reinterpret_cast<ostream*>(clog);
139*0b57cec5SDimitry Andric     wostream* wclog_ptr = reinterpret_cast<wostream*>(wclog);
140*0b57cec5SDimitry Andric     clog_ptr->flush();
141*0b57cec5SDimitry Andric     wclog_ptr->flush();
142*0b57cec5SDimitry Andric }
143*0b57cec5SDimitry Andric 
144*0b57cec5SDimitry Andric _LIBCPP_END_NAMESPACE_STD
145