external/bsd/libc++/dist/libcxx/src/iostream.cpp

   1 //===------------------------ iostream.cpp --------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is dual licensed under the MIT and the University of Illinois Open
   6 // Source Licenses. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "__std_stream"
  11 #include "string"
  12 #include "new"
  13
  14 _LIBCPP_BEGIN_NAMESPACE_STD
  15
  16 #ifndef _LIBCPP_HAS_NO_STDIN
  17 _ALIGNAS_TYPE (istream)  _LIBCPP_FUNC_VIS char cin [sizeof(istream)];
  18 _ALIGNAS_TYPE (__stdinbuf<char> ) static char __cin [sizeof(__stdinbuf <char>)];
  19 static mbstate_t mb_cin;
  20 _ALIGNAS_TYPE (wistream) _LIBCPP_FUNC_VIS char wcin [sizeof(wistream)];
  21 _ALIGNAS_TYPE (__stdinbuf<wchar_t> ) static char __wcin [sizeof(__stdinbuf <wchar_t>)];
  22 static mbstate_t mb_wcin;
  23 #endif
  24
  25 #ifndef _LIBCPP_HAS_NO_STDOUT
  26 _ALIGNAS_TYPE (ostream)  _LIBCPP_FUNC_VIS char cout[sizeof(ostream)];
  27 _ALIGNAS_TYPE (__stdoutbuf<char>) static char __cout[sizeof(__stdoutbuf<char>)];
  28 static mbstate_t mb_cout;
  29 _ALIGNAS_TYPE (wostream) _LIBCPP_FUNC_VIS char wcout[sizeof(wostream)];
  30 _ALIGNAS_TYPE (__stdoutbuf<wchar_t>) static char __wcout[sizeof(__stdoutbuf<wchar_t>)];
  31 static mbstate_t mb_wcout;
  32 #endif
  33
  34 _ALIGNAS_TYPE (ostream)  _LIBCPP_FUNC_VIS char cerr[sizeof(ostream)];
  35 _ALIGNAS_TYPE (__stdoutbuf<char>) static char __cerr[sizeof(__stdoutbuf<char>)];
  36 static mbstate_t mb_cerr;
  37 _ALIGNAS_TYPE (wostream) _LIBCPP_FUNC_VIS char wcerr[sizeof(wostream)];
  38 _ALIGNAS_TYPE (__stdoutbuf<wchar_t>) static char __wcerr[sizeof(__stdoutbuf<wchar_t>)];
  39 static mbstate_t mb_wcerr;
  40
  41 _ALIGNAS_TYPE (ostream)  _LIBCPP_FUNC_VIS char clog[sizeof(ostream)];
  42 _ALIGNAS_TYPE (wostream) _LIBCPP_FUNC_VIS char wclog[sizeof(wostream)];
  43
  44 ios_base::Init __start_std_streams;
  45
  46 ios_base::Init::Init()
  47 {
  48 #ifndef _LIBCPP_HAS_NO_STDIN
  49     istream* cin_ptr  = ::new(cin)  istream(::new(__cin)  __stdinbuf <char>(stdin, &mb_cin));
  50     wistream* wcin_ptr  = ::new(wcin)  wistream(::new(__wcin)  __stdinbuf <wchar_t>(stdin, &mb_wcin));
  51 #endif
  52 #ifndef _LIBCPP_HAS_NO_STDOUT
  53     ostream* cout_ptr = ::new(cout) ostream(::new(__cout) __stdoutbuf<char>(stdout, &mb_cout));
  54     wostream* wcout_ptr = ::new(wcout) wostream(::new(__wcout) __stdoutbuf<wchar_t>(stdout, &mb_wcout));
  55 #endif
  56     ostream* cerr_ptr = ::new(cerr) ostream(::new(__cerr) __stdoutbuf<char>(stderr, &mb_cerr));
  57                         ::new(clog) ostream(cerr_ptr->rdbuf());
  58     wostream* wcerr_ptr = ::new(wcerr) wostream(::new(__wcerr) __stdoutbuf<wchar_t>(stderr, &mb_wcerr));
  59                           ::new(wclog) wostream(wcerr_ptr->rdbuf());
  60
  61 #if !defined(_LIBCPP_HAS_NO_STDIN) && !defined(_LIBCPP_HAS_NO_STDOUT)
  62     cin_ptr->tie(cout_ptr);
  63     wcin_ptr->tie(wcout_ptr);
  64 #endif
  65     _VSTD::unitbuf(*cerr_ptr);
  66     _VSTD::unitbuf(*wcerr_ptr);
  67 #ifndef _LIBCPP_HAS_NO_STDOUT
  68     cerr_ptr->tie(cout_ptr);
  69     wcerr_ptr->tie(wcout_ptr);
  70 #endif
  71 }
  72
  73 ios_base::Init::~Init()
  74 {
  75 #ifndef _LIBCPP_HAS_NO_STDOUT
  76     ostream* cout_ptr = reinterpret_cast<ostream*>(cout);
  77     wostream* wcout_ptr = reinterpret_cast<wostream*>(wcout);
  78     cout_ptr->flush();
  79     wcout_ptr->flush();
  80 #endif
  81
  82     ostream* clog_ptr = reinterpret_cast<ostream*>(clog);
  83     wostream* wclog_ptr = reinterpret_cast<wostream*>(wclog);
  84     clog_ptr->flush();
  85     wclog_ptr->flush();
  86 }
  87
  88 _LIBCPP_END_NAMESPACE_STD