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Diffstat (limited to 'contrib/libstdc++/src/ios.cc')
| -rw-r--r-- | contrib/libstdc++/src/ios.cc | 359 |
1 files changed, 359 insertions, 0 deletions
diff --git a/contrib/libstdc++/src/ios.cc b/contrib/libstdc++/src/ios.cc new file mode 100644 index 0000000..c1167f8 --- /dev/null +++ b/contrib/libstdc++/src/ios.cc @@ -0,0 +1,359 @@ +// Iostreams base classes -*- C++ -*- + +// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 +// 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 2, 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. + +// You should have received a copy of the GNU General Public License along +// with this library; see the file COPYING. If not, write to the Free +// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, +// USA. + +// As a special exception, you may use this file as part of a free software +// library without restriction. Specifically, if other files instantiate +// templates or use macros or inline functions from this file, or you compile +// this file and link it with other files to produce an executable, this +// file does not by itself cause the resulting executable to be covered by +// the GNU General Public License. This exception does not however +// invalidate any other reasons why the executable file might be covered by +// the GNU General Public License. + +// +// ISO C++ 14882: 27.4 Iostreams base classes +// + +#include <ios> +#include <ostream> +#include <istream> +#include <fstream> +#include <bits/atomicity.h> +#include <ext/stdio_filebuf.h> + +namespace std +{ + // Extern declarations for global objects in src/globals.cc. + extern istream cin; + extern ostream cout; + extern ostream cerr; + extern ostream clog; + + using __gnu_cxx::stdio_filebuf; + extern stdio_filebuf<char> buf_cout; + extern stdio_filebuf<char> buf_cin; + extern stdio_filebuf<char> buf_cerr; + +#ifdef _GLIBCPP_USE_WCHAR_T + extern wistream wcin; + extern wostream wcout; + extern wostream wcerr; + extern wostream wclog; + + extern stdio_filebuf<wchar_t> buf_wcout; + extern stdio_filebuf<wchar_t> buf_wcin; + extern stdio_filebuf<wchar_t> buf_wcerr; +#endif + + // Definitions for static const data members of __ios_flags. + const __ios_flags::__int_type __ios_flags::_S_boolalpha; + const __ios_flags::__int_type __ios_flags::_S_dec; + const __ios_flags::__int_type __ios_flags::_S_fixed; + const __ios_flags::__int_type __ios_flags::_S_hex; + const __ios_flags::__int_type __ios_flags::_S_internal; + const __ios_flags::__int_type __ios_flags::_S_left; + const __ios_flags::__int_type __ios_flags::_S_oct; + const __ios_flags::__int_type __ios_flags::_S_right; + const __ios_flags::__int_type __ios_flags::_S_scientific; + const __ios_flags::__int_type __ios_flags::_S_showbase; + const __ios_flags::__int_type __ios_flags::_S_showpoint; + const __ios_flags::__int_type __ios_flags::_S_showpos; + const __ios_flags::__int_type __ios_flags::_S_skipws; + const __ios_flags::__int_type __ios_flags::_S_unitbuf; + const __ios_flags::__int_type __ios_flags::_S_uppercase; + const __ios_flags::__int_type __ios_flags::_S_adjustfield; + const __ios_flags::__int_type __ios_flags::_S_basefield; + const __ios_flags::__int_type __ios_flags::_S_floatfield; + + const __ios_flags::__int_type __ios_flags::_S_badbit; + const __ios_flags::__int_type __ios_flags::_S_eofbit; + const __ios_flags::__int_type __ios_flags::_S_failbit; + + const __ios_flags::__int_type __ios_flags::_S_app; + const __ios_flags::__int_type __ios_flags::_S_ate; + const __ios_flags::__int_type __ios_flags::_S_bin; + const __ios_flags::__int_type __ios_flags::_S_in; + const __ios_flags::__int_type __ios_flags::_S_out; + const __ios_flags::__int_type __ios_flags::_S_trunc; + + // Definitions for static const members of ios_base. + const ios_base::fmtflags ios_base::boolalpha; + const ios_base::fmtflags ios_base::dec; + const ios_base::fmtflags ios_base::fixed; + const ios_base::fmtflags ios_base::hex; + const ios_base::fmtflags ios_base::internal; + const ios_base::fmtflags ios_base::left; + const ios_base::fmtflags ios_base::oct; + const ios_base::fmtflags ios_base::right; + const ios_base::fmtflags ios_base::scientific; + const ios_base::fmtflags ios_base::showbase; + const ios_base::fmtflags ios_base::showpoint; + const ios_base::fmtflags ios_base::showpos; + const ios_base::fmtflags ios_base::skipws; + const ios_base::fmtflags ios_base::unitbuf; + const ios_base::fmtflags ios_base::uppercase; + const ios_base::fmtflags ios_base::adjustfield; + const ios_base::fmtflags ios_base::basefield; + const ios_base::fmtflags ios_base::floatfield; + + const ios_base::iostate ios_base::badbit; + const ios_base::iostate ios_base::eofbit; + const ios_base::iostate ios_base::failbit; + const ios_base::iostate ios_base::goodbit; + + const ios_base::openmode ios_base::app; + const ios_base::openmode ios_base::ate; + const ios_base::openmode ios_base::binary; + const ios_base::openmode ios_base::in; + const ios_base::openmode ios_base::out; + const ios_base::openmode ios_base::trunc; + + const ios_base::seekdir ios_base::beg; + const ios_base::seekdir ios_base::cur; + const ios_base::seekdir ios_base::end; + + const int ios_base::_S_local_word_size; + int ios_base::Init::_S_ios_base_init = 0; + bool ios_base::Init::_S_synced_with_stdio = true; + + ios_base::failure::failure(const string& __str) throw() + { + strncpy(_M_name, __str.c_str(), _M_bufsize); + _M_name[_M_bufsize - 1] = '\0'; + } + + ios_base::failure::~failure() throw() + { } + + const char* + ios_base::failure::what() const throw() + { return _M_name; } + + void + ios_base::Init::_S_ios_create(bool __sync) + { + int __out_size = __sync ? 0 : static_cast<int>(BUFSIZ); + int __in_size = __sync ? 1 : static_cast<int>(BUFSIZ); + + // NB: The file globals.cc creates the four standard files + // with NULL buffers. At this point, we swap out the dummy NULL + // [io]stream objects and buffers with the real deal. + new (&buf_cout) stdio_filebuf<char>(stdout, ios_base::out, __out_size); + new (&buf_cin) stdio_filebuf<char>(stdin, ios_base::in, __in_size); + new (&buf_cerr) stdio_filebuf<char>(stderr, ios_base::out, __out_size); + new (&cout) ostream(&buf_cout); + new (&cin) istream(&buf_cin); + new (&cerr) ostream(&buf_cerr); + new (&clog) ostream(&buf_cerr); + cin.tie(&cout); + cerr.flags(ios_base::unitbuf); + +#ifdef _GLIBCPP_USE_WCHAR_T + new (&buf_wcout) stdio_filebuf<wchar_t>(stdout, ios_base::out, __out_size); + new (&buf_wcin) stdio_filebuf<wchar_t>(stdin, ios_base::in, __in_size); + new (&buf_wcerr) stdio_filebuf<wchar_t>(stderr, ios_base::out, __out_size); + new (&wcout) wostream(&buf_wcout); + new (&wcin) wistream(&buf_wcin); + new (&wcerr) wostream(&buf_wcerr); + new (&wclog) wostream(&buf_wcerr); + wcin.tie(&wcout); + wcerr.flags(ios_base::unitbuf); +#endif + } + + void + ios_base::Init::_S_ios_destroy() + { + // 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.~stdio_filebuf(); + buf_cin.~stdio_filebuf(); + buf_cerr.~stdio_filebuf(); + +#ifdef _GLIBCPP_USE_WCHAR_T + buf_wcout.~stdio_filebuf(); + buf_wcin.~stdio_filebuf(); + buf_wcerr.~stdio_filebuf(); +#endif + } + + ios_base::Init::Init() + { + if (_S_ios_base_init == 0) + { + // Standard streams default to synced with "C" operations. + ios_base::Init::_S_synced_with_stdio = true; + _S_ios_create(ios_base::Init::_S_synced_with_stdio); + } + ++_S_ios_base_init; + } + + ios_base::Init::~Init() + { + if (--_S_ios_base_init == 0) + _S_ios_destroy(); + } + + // 27.4.2.5 ios_base storage functions + int + ios_base::xalloc() throw() + { + // Implementation note: Initialize top to zero to ensure that + // initialization occurs before main() is started. + static _Atomic_word _S_top = 0; + return __exchange_and_add(&_S_top, 1) + 4; + } + + // 27.4.2.5 iword/pword storage + ios_base::_Words& + ios_base::_M_grow_words(int ix) + { + // Precondition: _M_word_size <= ix + int newsize = _S_local_word_size; + _Words* words = _M_local_word; + if (ix > _S_local_word_size - 1) + { + if (ix < numeric_limits<int>::max()) + { + newsize = ix + 1; + try + { words = new _Words[newsize]; } + catch (...) + { + delete [] _M_word; + _M_word = 0; + _M_streambuf_state |= badbit; + if (_M_streambuf_state & _M_exception) + __throw_ios_failure("ios_base::_M_grow_words failure"); + return _M_word_zero; + } + for (int i = 0; i < _M_word_size; i++) + words[i] = _M_word[i]; + if (_M_word && _M_word != _M_local_word) + { + delete [] _M_word; + _M_word = 0; + } + } + else + { + _M_streambuf_state |= badbit; + return _M_word_zero; + } + } + _M_word = words; + _M_word_size = newsize; + return _M_word[ix]; + } + + // Called only by basic_ios<>::init. + void + ios_base::_M_init() + { + // NB: May be called more than once + _M_precision = 6; + _M_width = 0; + _M_flags = skipws | dec; + _M_callbacks = 0; + _M_word_size = 0; + _M_ios_locale = locale(); + } + + // 27.4.2.3 ios_base locale functions + locale + ios_base::imbue(const locale& __loc) + { + locale __old = _M_ios_locale; + _M_ios_locale = __loc; + _M_call_callbacks(imbue_event); + return __old; + } + + ios_base::ios_base() : _M_callbacks(0), _M_word(0) + { + // Do nothing: basic_ios::init() does it. + // NB: _M_callbacks and _M_word must be zero for non-initialized + // ios_base to go through ~ios_base gracefully. + } + + // 27.4.2.7 ios_base constructors/destructors + ios_base::~ios_base() + { + _M_call_callbacks(erase_event); + _M_dispose_callbacks(); + if (_M_word && _M_word != _M_local_word) + { + delete [] _M_word; + _M_word = 0; + } + } + + void + ios_base::register_callback(event_callback __fn, int __index) + { _M_callbacks = new _Callback_list(__fn, __index, _M_callbacks); } + + void + ios_base::_M_call_callbacks(event __e) throw() + { + _Callback_list* __p = _M_callbacks; + while (__p) + { + try + { (*__p->_M_fn) (__e, *this, __p->_M_index); } + catch (...) + { } + __p = __p->_M_next; + } + } + + void + ios_base::_M_dispose_callbacks(void) + { + _Callback_list* __p = _M_callbacks; + while (__p && __p->_M_remove_reference() == 0) + { + _Callback_list* __next = __p->_M_next; + delete __p; + __p = __next; + } + _M_callbacks = 0; + } + + bool + ios_base::sync_with_stdio(bool __sync) + { +#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS + // 49. Underspecification of ios_base::sync_with_stdio + bool __ret = ios_base::Init::_S_synced_with_stdio; +#endif + + // Turn off sync with C FILE* for cin, cout, cerr, clog iff + // currently synchronized. + if (!__sync && __ret) + { + ios_base::Init::_S_synced_with_stdio = false; + ios_base::Init::_S_ios_destroy(); + ios_base::Init::_S_ios_create(ios_base::Init::_S_synced_with_stdio); + } + return __ret; + } +} // namespace std |
