--- /dev/null
+// Iostreams base classes -*- C++ -*-
+
+// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
+// 2006, 2007, 2008, 2009
+// Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+//
+// ISO C++ 14882: 27.4 Iostreams base classes
+//
+
+#include <ios>
+#include <ostream>
+#include <istream>
+#include <fstream>
+#include <ext/stdio_filebuf.h>
+#include <ext/stdio_sync_filebuf.h>
+
+namespace __gnu_internal _GLIBCXX_VISIBILITY_ATTR(hidden)
+{
+ using namespace __gnu_cxx;
+
+ // Extern declarations for global objects in src/globals.cc.
+ extern stdio_sync_filebuf<char> buf_cout_sync;
+ extern stdio_sync_filebuf<char> buf_cin_sync;
+ extern stdio_sync_filebuf<char> buf_cerr_sync;
+
+ extern stdio_filebuf<char> buf_cout;
+ extern stdio_filebuf<char> buf_cin;
+ extern stdio_filebuf<char> buf_cerr;
+
+#ifdef _GLIBCXX_USE_WCHAR_T
+ extern stdio_sync_filebuf<wchar_t> buf_wcout_sync;
+ extern stdio_sync_filebuf<wchar_t> buf_wcin_sync;
+ extern stdio_sync_filebuf<wchar_t> buf_wcerr_sync;
+
+ extern stdio_filebuf<wchar_t> buf_wcout;
+ extern stdio_filebuf<wchar_t> buf_wcin;
+ extern stdio_filebuf<wchar_t> buf_wcerr;
+#endif
+} // namespace __gnu_internal
+
+_GLIBCXX_BEGIN_NAMESPACE(std)
+
+ using namespace __gnu_internal;
+
+ extern istream cin;
+ extern ostream cout;
+ extern ostream cerr;
+ extern ostream clog;
+
+#ifdef _GLIBCXX_USE_WCHAR_T
+ extern wistream wcin;
+ extern wostream wcout;
+ extern wostream wcerr;
+ extern wostream wclog;
+#endif
+
+ ios_base::Init::Init()
+ {
+ if (__gnu_cxx::__exchange_and_add_dispatch(&_S_refcount, 1) == 0)
+ {
+ // Standard streams default to synced with "C" operations.
+ _S_synced_with_stdio = true;
+
+ new (&buf_cout_sync) stdio_sync_filebuf<char>(stdout);
+ new (&buf_cin_sync) stdio_sync_filebuf<char>(stdin);
+ new (&buf_cerr_sync) stdio_sync_filebuf<char>(stderr);
+
+ // The standard streams are constructed once only and never
+ // destroyed.
+ new (&cout) ostream(&buf_cout_sync);
+ new (&cin) istream(&buf_cin_sync);
+ new (&cerr) ostream(&buf_cerr_sync);
+ new (&clog) ostream(&buf_cerr_sync);
+ cin.tie(&cout);
+ cerr.flags(ios_base::unitbuf);
+ // _GLIBCXX_RESOLVE_LIB_DEFECTS
+ // 455. cerr::tie() and wcerr::tie() are overspecified.
+ cerr.tie(&cout);
+
+#ifdef _GLIBCXX_USE_WCHAR_T
+ new (&buf_wcout_sync) stdio_sync_filebuf<wchar_t>(stdout);
+ new (&buf_wcin_sync) stdio_sync_filebuf<wchar_t>(stdin);
+ new (&buf_wcerr_sync) stdio_sync_filebuf<wchar_t>(stderr);
+
+ new (&wcout) wostream(&buf_wcout_sync);
+ new (&wcin) wistream(&buf_wcin_sync);
+ new (&wcerr) wostream(&buf_wcerr_sync);
+ new (&wclog) wostream(&buf_wcerr_sync);
+ wcin.tie(&wcout);
+ wcerr.flags(ios_base::unitbuf);
+ wcerr.tie(&wcout);
+#endif
+
+ // NB: Have to set refcount above one, so that standard
+ // streams are not re-initialized with uses of ios_base::Init
+ // besides <iostream> static object, ie just using <ios> with
+ // ios_base::Init objects.
+ __gnu_cxx::__atomic_add_dispatch(&_S_refcount, 1);
+ }
+ }
+
+ ios_base::Init::~Init()
+ {
+ if (__gnu_cxx::__exchange_and_add_dispatch(&_S_refcount, -1) == 2)
+ {
+ // Catch any exceptions thrown by basic_ostream::flush()
+ __try
+ {
+ // Flush standard output streams as required by 27.4.2.1.6
+ cout.flush();
+ cerr.flush();
+ clog.flush();
+
+#ifdef _GLIBCXX_USE_WCHAR_T
+ wcout.flush();
+ wcerr.flush();
+ wclog.flush();
+#endif
+ }
+ __catch(...)
+ { }
+ }
+ }
+
+ bool
+ ios_base::sync_with_stdio(bool __sync)
+ {
+ // _GLIBCXX_RESOLVE_LIB_DEFECTS
+ // 49. Underspecification of ios_base::sync_with_stdio
+ bool __ret = ios_base::Init::_S_synced_with_stdio;
+
+ // Turn off sync with C FILE* for cin, cout, cerr, clog iff
+ // currently synchronized.
+ if (!__sync && __ret)
+ {
+ // Make sure the standard streams are constructed.
+ ios_base::Init __init;
+
+ ios_base::Init::_S_synced_with_stdio = __sync;
+
+ // Explicitly call dtors to free any memory that is
+ // dynamically allocated by filebuf ctor or member functions,
+ // but don't deallocate all memory by calling operator delete.
+ buf_cout_sync.~stdio_sync_filebuf<char>();
+ buf_cin_sync.~stdio_sync_filebuf<char>();
+ buf_cerr_sync.~stdio_sync_filebuf<char>();
+
+#ifdef _GLIBCXX_USE_WCHAR_T
+ buf_wcout_sync.~stdio_sync_filebuf<wchar_t>();
+ buf_wcin_sync.~stdio_sync_filebuf<wchar_t>();
+ buf_wcerr_sync.~stdio_sync_filebuf<wchar_t>();
+#endif
+
+ // Create stream buffers for the standard streams and use
+ // those buffers without destroying and recreating the
+ // streams.
+ new (&buf_cout) stdio_filebuf<char>(stdout, ios_base::out);
+ new (&buf_cin) stdio_filebuf<char>(stdin, ios_base::in);
+ new (&buf_cerr) stdio_filebuf<char>(stderr, ios_base::out);
+ cout.rdbuf(&buf_cout);
+ cin.rdbuf(&buf_cin);
+ cerr.rdbuf(&buf_cerr);
+ clog.rdbuf(&buf_cerr);
+
+#ifdef _GLIBCXX_USE_WCHAR_T
+ new (&buf_wcout) stdio_filebuf<wchar_t>(stdout, ios_base::out);
+ new (&buf_wcin) stdio_filebuf<wchar_t>(stdin, ios_base::in);
+ new (&buf_wcerr) stdio_filebuf<wchar_t>(stderr, ios_base::out);
+ wcout.rdbuf(&buf_wcout);
+ wcin.rdbuf(&buf_wcin);
+ wcerr.rdbuf(&buf_wcerr);
+ wclog.rdbuf(&buf_wcerr);
+#endif
+ }
+ return __ret;
+ }
+
+_GLIBCXX_END_NAMESPACE
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