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- // 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: 27.8 File-based streams
- //
-
- /** @file ios_base.h
- * This is an internal header file, included by other library headers.
- * You should not attempt to use it directly.
- */
-
- #ifndef _CPP_BITS_IOSBASE_H
- #define _CPP_BITS_IOSBASE_H 1
-
- #pragma GCC system_header
-
- #include <bits/atomicity.h>
-
- namespace std
- {
- // The following definitions of bitmask types are enums, not ints,
- // as permitted (but not required) in the standard, in order to provide
- // better type safety in iostream calls. A side effect is that
- // expressions involving them are no longer compile-time constants.
- enum _Ios_Fmtflags { _M_ios_fmtflags_end = 1L << 16 };
-
- inline _Ios_Fmtflags
- operator&(_Ios_Fmtflags __a, _Ios_Fmtflags __b)
- { return _Ios_Fmtflags(static_cast<int>(__a) & static_cast<int>(__b)); }
-
- inline _Ios_Fmtflags
- operator|(_Ios_Fmtflags __a, _Ios_Fmtflags __b)
- { return _Ios_Fmtflags(static_cast<int>(__a) | static_cast<int>(__b)); }
-
- inline _Ios_Fmtflags
- operator^(_Ios_Fmtflags __a, _Ios_Fmtflags __b)
- { return _Ios_Fmtflags(static_cast<int>(__a) ^ static_cast<int>(__b)); }
-
- inline _Ios_Fmtflags
- operator|=(_Ios_Fmtflags& __a, _Ios_Fmtflags __b)
- { return __a = __a | __b; }
-
- inline _Ios_Fmtflags
- operator&=(_Ios_Fmtflags& __a, _Ios_Fmtflags __b)
- { return __a = __a & __b; }
-
- inline _Ios_Fmtflags
- operator^=(_Ios_Fmtflags& __a, _Ios_Fmtflags __b)
- { return __a = __a ^ __b; }
-
- inline _Ios_Fmtflags
- operator~(_Ios_Fmtflags __a)
- { return _Ios_Fmtflags(~static_cast<int>(__a)); }
-
-
- enum _Ios_Openmode { _M_ios_openmode_end = 1L << 16 };
-
- inline _Ios_Openmode
- operator&(_Ios_Openmode __a, _Ios_Openmode __b)
- { return _Ios_Openmode(static_cast<int>(__a) & static_cast<int>(__b)); }
-
- inline _Ios_Openmode
- operator|(_Ios_Openmode __a, _Ios_Openmode __b)
- { return _Ios_Openmode(static_cast<int>(__a) | static_cast<int>(__b)); }
-
- inline _Ios_Openmode
- operator^(_Ios_Openmode __a, _Ios_Openmode __b)
- { return _Ios_Openmode(static_cast<int>(__a) ^ static_cast<int>(__b)); }
-
- inline _Ios_Openmode
- operator|=(_Ios_Openmode& __a, _Ios_Openmode __b)
- { return __a = __a | __b; }
-
- inline _Ios_Openmode
- operator&=(_Ios_Openmode& __a, _Ios_Openmode __b)
- { return __a = __a & __b; }
-
- inline _Ios_Openmode
- operator^=(_Ios_Openmode& __a, _Ios_Openmode __b)
- { return __a = __a ^ __b; }
-
- inline _Ios_Openmode
- operator~(_Ios_Openmode __a)
- { return _Ios_Openmode(~static_cast<int>(__a)); }
-
-
- enum _Ios_Iostate { _M_ios_iostate_end = 1L << 16 };
-
- inline _Ios_Iostate
- operator&(_Ios_Iostate __a, _Ios_Iostate __b)
- { return _Ios_Iostate(static_cast<int>(__a) & static_cast<int>(__b)); }
-
- inline _Ios_Iostate
- operator|(_Ios_Iostate __a, _Ios_Iostate __b)
- { return _Ios_Iostate(static_cast<int>(__a) | static_cast<int>(__b)); }
-
- inline _Ios_Iostate
- operator^(_Ios_Iostate __a, _Ios_Iostate __b)
- { return _Ios_Iostate(static_cast<int>(__a) ^ static_cast<int>(__b)); }
-
- inline _Ios_Iostate
- operator|=(_Ios_Iostate& __a, _Ios_Iostate __b)
- { return __a = __a | __b; }
-
- inline _Ios_Iostate
- operator&=(_Ios_Iostate& __a, _Ios_Iostate __b)
- { return __a = __a & __b; }
-
- inline _Ios_Iostate
- operator^=(_Ios_Iostate& __a, _Ios_Iostate __b)
- { return __a = __a ^ __b; }
-
- inline _Ios_Iostate
- operator~(_Ios_Iostate __a)
- { return _Ios_Iostate(~static_cast<int>(__a)); }
-
- enum _Ios_Seekdir { _M_ios_seekdir_end = 1L << 16 };
-
- // 27.4.2 Class ios_base
- class ios_base
- {
- public:
-
- // 27.4.2.1.1 Class ios_base::failure
- class failure : public exception
- {
- public:
- #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
- //48. Use of non-existent exception constructor
- explicit
- failure(const string& __str) throw();
-
- // This declaration is not useless:
- // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
- virtual
- ~failure() throw();
-
- virtual const char*
- what() const throw();
-
- private:
- enum { _M_bufsize = 256 };
- char _M_name[_M_bufsize];
- #endif
- };
-
- // 27.4.2.1.2 Type ios_base::fmtflags
- typedef _Ios_Fmtflags fmtflags;
- // 27.4.2.1.2 Type fmtflags
- static const fmtflags boolalpha = fmtflags(__ios_flags::_S_boolalpha);
- static const fmtflags dec = fmtflags(__ios_flags::_S_dec);
- static const fmtflags fixed = fmtflags(__ios_flags::_S_fixed);
- static const fmtflags hex = fmtflags(__ios_flags::_S_hex);
- static const fmtflags internal = fmtflags(__ios_flags::_S_internal);
- static const fmtflags left = fmtflags(__ios_flags::_S_left);
- static const fmtflags oct = fmtflags(__ios_flags::_S_oct);
- static const fmtflags right = fmtflags(__ios_flags::_S_right);
- static const fmtflags scientific = fmtflags(__ios_flags::_S_scientific);
- static const fmtflags showbase = fmtflags(__ios_flags::_S_showbase);
- static const fmtflags showpoint = fmtflags(__ios_flags::_S_showpoint);
- static const fmtflags showpos = fmtflags(__ios_flags::_S_showpos);
- static const fmtflags skipws = fmtflags(__ios_flags::_S_skipws);
- static const fmtflags unitbuf = fmtflags(__ios_flags::_S_unitbuf);
- static const fmtflags uppercase = fmtflags(__ios_flags::_S_uppercase);
- static const fmtflags adjustfield = fmtflags(__ios_flags::_S_adjustfield);
- static const fmtflags basefield = fmtflags(__ios_flags::_S_basefield);
- static const fmtflags floatfield = fmtflags(__ios_flags::_S_floatfield);
-
- // 27.4.2.1.3 Type ios_base::iostate
- typedef _Ios_Iostate iostate;
- static const iostate badbit = iostate(__ios_flags::_S_badbit);
- static const iostate eofbit = iostate(__ios_flags::_S_eofbit);
- static const iostate failbit = iostate(__ios_flags::_S_failbit);
- static const iostate goodbit = iostate(0);
-
- // 27.4.2.1.4 Type openmode
- typedef _Ios_Openmode openmode;
- static const openmode app = openmode(__ios_flags::_S_app);
- static const openmode ate = openmode(__ios_flags::_S_ate);
- static const openmode binary = openmode(__ios_flags::_S_bin);
- static const openmode in = openmode(__ios_flags::_S_in);
- static const openmode out = openmode(__ios_flags::_S_out);
- static const openmode trunc = openmode(__ios_flags::_S_trunc);
-
- // 27.4.2.1.5 Type seekdir
- typedef _Ios_Seekdir seekdir;
- static const seekdir beg = seekdir(0);
- static const seekdir cur = seekdir(SEEK_CUR);
- static const seekdir end = seekdir(SEEK_END);
-
- #ifdef _GLIBCPP_DEPRECATED
- typedef int io_state;
- typedef int open_mode;
- typedef int seek_dir;
- #endif
-
- // Callbacks;
- enum event
- {
- erase_event,
- imbue_event,
- copyfmt_event
- };
-
- typedef void (*event_callback) (event, ios_base&, int);
-
- void
- register_callback(event_callback __fn, int __index);
-
- protected:
- // Data Members
- streamsize _M_precision;
- streamsize _M_width;
- fmtflags _M_flags;
- iostate _M_exception;
- iostate _M_streambuf_state;
-
- // 27.4.2.6 Members for callbacks
- // 27.4.2.6 ios_base callbacks
- struct _Callback_list
- {
- // Data Members
- _Callback_list* _M_next;
- ios_base::event_callback _M_fn;
- int _M_index;
- _Atomic_word _M_refcount; // 0 means one reference.
-
- _Callback_list(ios_base::event_callback __fn, int __index,
- _Callback_list* __cb)
- : _M_next(__cb), _M_fn(__fn), _M_index(__index), _M_refcount(0) { }
-
- void
- _M_add_reference() { __atomic_add(&_M_refcount, 1); }
-
- // 0 => OK to delete.
- int
- _M_remove_reference() { return __exchange_and_add(&_M_refcount, -1); }
- };
-
- _Callback_list* _M_callbacks;
-
- void
- _M_call_callbacks(event __ev) throw();
-
- void
- _M_dispose_callbacks(void);
-
- // 27.4.2.5 Members for iword/pword storage
- struct _Words
- {
- void* _M_pword;
- long _M_iword;
- _Words() : _M_pword(0), _M_iword(0) { }
- };
-
- // Only for failed iword/pword calls.
- _Words _M_word_zero;
-
- // Guaranteed storage.
- static const int _S_local_word_size = 8;
- _Words _M_local_word[_S_local_word_size];
-
- // Allocated storage.
- int _M_word_size;
- _Words* _M_word;
-
- _Words&
- _M_grow_words(int __index);
-
- // Members for locale and locale caching.
- locale _M_ios_locale;
-
- void
- _M_init();
-
- public:
-
- // 27.4.2.1.6 Class ios_base::Init
- // Used to initialize standard streams. In theory, g++ could use
- // -finit-priority to order this stuff correctly without going
- // through these machinations.
- class Init
- {
- friend class ios_base;
- public:
- Init();
- ~Init();
-
- static void
- _S_ios_create(bool __sync);
-
- static void
- _S_ios_destroy();
-
- private:
- static int _S_ios_base_init;
- static bool _S_synced_with_stdio;
- };
-
- // Fmtflags state:
- inline fmtflags
- flags() const { return _M_flags; }
-
- inline fmtflags
- flags(fmtflags __fmtfl)
- {
- fmtflags __old = _M_flags;
- _M_flags = __fmtfl;
- return __old;
- }
-
- inline fmtflags
- setf(fmtflags __fmtfl)
- {
- fmtflags __old = _M_flags;
- _M_flags |= __fmtfl;
- return __old;
- }
-
- inline fmtflags
- setf(fmtflags __fmtfl, fmtflags __mask)
- {
- fmtflags __old = _M_flags;
- _M_flags &= ~__mask;
- _M_flags |= (__fmtfl & __mask);
- return __old;
- }
-
- inline void
- unsetf(fmtflags __mask) { _M_flags &= ~__mask; }
-
- inline streamsize
- precision() const { return _M_precision; }
-
- inline streamsize
- precision(streamsize __prec)
- {
- streamsize __old = _M_precision;
- _M_precision = __prec;
- return __old;
- }
-
- inline streamsize
- width() const { return _M_width; }
-
- inline streamsize
- width(streamsize __wide)
- {
- streamsize __old = _M_width;
- _M_width = __wide;
- return __old;
- }
-
- static bool
- sync_with_stdio(bool __sync = true);
-
- // Locales:
- locale
- imbue(const locale& __loc);
-
- inline locale
- getloc() const { return _M_ios_locale; }
-
- // Storage:
- static int
- xalloc() throw();
-
- inline long&
- iword(int __ix)
- {
- _Words& __word = (__ix < _M_word_size)
- ? _M_word[__ix] : _M_grow_words(__ix);
- return __word._M_iword;
- }
-
- inline void*&
- pword(int __ix)
- {
- _Words& __word = (__ix < _M_word_size)
- ? _M_word[__ix] : _M_grow_words(__ix);
- return __word._M_pword;
- }
-
- // Destructor
- ~ios_base();
-
- protected:
- ios_base();
-
- #ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
- //50. Copy constructor and assignment operator of ios_base
- private:
- ios_base(const ios_base&);
-
- ios_base&
- operator=(const ios_base&);
- #endif
- };
-
- // 27.4.5.1 fmtflags manipulators:
- inline ios_base&
- boolalpha(ios_base& __base)
- {
- __base.setf(ios_base::boolalpha);
- return __base;
- }
-
- inline ios_base&
- noboolalpha(ios_base& __base)
- {
- __base.unsetf(ios_base::boolalpha);
- return __base;
- }
-
- inline ios_base&
- showbase(ios_base& __base)
- {
- __base.setf(ios_base::showbase);
- return __base;
- }
-
- inline ios_base&
- noshowbase(ios_base& __base)
- {
- __base.unsetf(ios_base::showbase);
- return __base;
- }
-
- inline ios_base&
- showpoint(ios_base& __base)
- {
- __base.setf(ios_base::showpoint);
- return __base;
- }
-
- inline ios_base&
- noshowpoint(ios_base& __base)
- {
- __base.unsetf(ios_base::showpoint);
- return __base;
- }
-
- inline ios_base&
- showpos(ios_base& __base)
- {
- __base.setf(ios_base::showpos);
- return __base;
- }
-
- inline ios_base&
- noshowpos(ios_base& __base)
- {
- __base.unsetf(ios_base::showpos);
- return __base;
- }
-
- inline ios_base&
- skipws(ios_base& __base)
- {
- __base.setf(ios_base::skipws);
- return __base;
- }
-
- inline ios_base&
- noskipws(ios_base& __base)
- {
- __base.unsetf(ios_base::skipws);
- return __base;
- }
-
- inline ios_base&
- uppercase(ios_base& __base)
- {
- __base.setf(ios_base::uppercase);
- return __base;
- }
-
- inline ios_base&
- nouppercase(ios_base& __base)
- {
- __base.unsetf(ios_base::uppercase);
- return __base;
- }
-
- inline ios_base&
- unitbuf(ios_base& __base)
- {
- __base.setf(ios_base::unitbuf);
- return __base;
- }
-
- inline ios_base&
- nounitbuf(ios_base& __base)
- {
- __base.unsetf(ios_base::unitbuf);
- return __base;
- }
-
- // 27.4.5.2 adjustfield anipulators:
- inline ios_base&
- internal(ios_base& __base)
- {
- __base.setf(ios_base::internal, ios_base::adjustfield);
- return __base;
- }
-
- inline ios_base&
- left(ios_base& __base)
- {
- __base.setf(ios_base::left, ios_base::adjustfield);
- return __base;
- }
-
- inline ios_base&
- right(ios_base& __base)
- {
- __base.setf(ios_base::right, ios_base::adjustfield);
- return __base;
- }
-
- // 27.4.5.3 basefield anipulators:
- inline ios_base&
- dec(ios_base& __base)
- {
- __base.setf(ios_base::dec, ios_base::basefield);
- return __base;
- }
-
- inline ios_base&
- hex(ios_base& __base)
- {
- __base.setf(ios_base::hex, ios_base::basefield);
- return __base;
- }
-
- inline ios_base&
- oct(ios_base& __base)
- {
- __base.setf(ios_base::oct, ios_base::basefield);
- return __base;
- }
-
- // 27.4.5.4 floatfield anipulators:
- inline ios_base&
- fixed(ios_base& __base)
- {
- __base.setf(ios_base::fixed, ios_base::floatfield);
- return __base;
- }
-
- inline ios_base&
- scientific(ios_base& __base)
- {
- __base.setf(ios_base::scientific, ios_base::floatfield);
- return __base;
- }
-
- } // namespace std
-
- #endif /* _CPP_BITS_IOSBASE_H */
-
-