mirror of git://gcc.gnu.org/git/gcc.git
572 lines
14 KiB
C++
572 lines
14 KiB
C++
// Iostreams base classes -*- C++ -*-
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// Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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//
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// ISO C++ 14882: 27.8 File-based streams
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//
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#ifndef _CPP_BITS_IOSBASE_H
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#define _CPP_BITS_IOSBASE_H 1
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#pragma GCC system_header
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namespace std
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{
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// The following definitions of bitmask types are enums, not ints,
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// as permitted (but not required) in the standard, in order to provide
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// better type safety in iostream calls. A side effect is that
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// expressions involving them are no longer compile-time constants.
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enum _Ios_Fmtflags { _M_ios_fmtflags_end = 1L << 16 };
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inline _Ios_Fmtflags
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operator&(_Ios_Fmtflags __a, _Ios_Fmtflags __b)
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{ return _Ios_Fmtflags(static_cast<int>(__a) & static_cast<int>(__b)); }
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inline _Ios_Fmtflags
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operator|(_Ios_Fmtflags __a, _Ios_Fmtflags __b)
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{ return _Ios_Fmtflags(static_cast<int>(__a) | static_cast<int>(__b)); }
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inline _Ios_Fmtflags
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operator^(_Ios_Fmtflags __a, _Ios_Fmtflags __b)
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{ return _Ios_Fmtflags(static_cast<int>(__a) ^ static_cast<int>(__b)); }
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inline _Ios_Fmtflags
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operator|=(_Ios_Fmtflags& __a, _Ios_Fmtflags __b)
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{ return __a = __a | __b; }
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inline _Ios_Fmtflags
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operator&=(_Ios_Fmtflags& __a, _Ios_Fmtflags __b)
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{ return __a = __a & __b; }
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inline _Ios_Fmtflags
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operator^=(_Ios_Fmtflags& __a, _Ios_Fmtflags __b)
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{ return __a = __a ^ __b; }
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inline _Ios_Fmtflags
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operator~(_Ios_Fmtflags __a)
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{ return _Ios_Fmtflags(~static_cast<int>(__a)); }
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enum _Ios_Openmode { _M_ios_openmode_end = 1L << 16 };
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inline _Ios_Openmode
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operator&(_Ios_Openmode __a, _Ios_Openmode __b)
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{ return _Ios_Openmode(static_cast<int>(__a) & static_cast<int>(__b)); }
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inline _Ios_Openmode
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operator|(_Ios_Openmode __a, _Ios_Openmode __b)
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{ return _Ios_Openmode(static_cast<int>(__a) | static_cast<int>(__b)); }
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inline _Ios_Openmode
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operator^(_Ios_Openmode __a, _Ios_Openmode __b)
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{ return _Ios_Openmode(static_cast<int>(__a) ^ static_cast<int>(__b)); }
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inline _Ios_Openmode
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operator|=(_Ios_Openmode& __a, _Ios_Openmode __b)
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{ return __a = __a | __b; }
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inline _Ios_Openmode
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operator&=(_Ios_Openmode& __a, _Ios_Openmode __b)
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{ return __a = __a & __b; }
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inline _Ios_Openmode
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operator^=(_Ios_Openmode& __a, _Ios_Openmode __b)
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{ return __a = __a ^ __b; }
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inline _Ios_Openmode
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operator~(_Ios_Openmode __a)
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{ return _Ios_Openmode(~static_cast<int>(__a)); }
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enum _Ios_Iostate { _M_ios_iostate_end = 1L << 16 };
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inline _Ios_Iostate
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operator&(_Ios_Iostate __a, _Ios_Iostate __b)
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{ return _Ios_Iostate(static_cast<int>(__a) & static_cast<int>(__b)); }
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inline _Ios_Iostate
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operator|(_Ios_Iostate __a, _Ios_Iostate __b)
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{ return _Ios_Iostate(static_cast<int>(__a) | static_cast<int>(__b)); }
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inline _Ios_Iostate
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operator^(_Ios_Iostate __a, _Ios_Iostate __b)
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{ return _Ios_Iostate(static_cast<int>(__a) ^ static_cast<int>(__b)); }
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inline _Ios_Iostate
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operator|=(_Ios_Iostate& __a, _Ios_Iostate __b)
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{ return __a = __a | __b; }
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inline _Ios_Iostate
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operator&=(_Ios_Iostate& __a, _Ios_Iostate __b)
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{ return __a = __a & __b; }
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inline _Ios_Iostate
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operator^=(_Ios_Iostate& __a, _Ios_Iostate __b)
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{ return __a = __a ^ __b; }
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inline _Ios_Iostate
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operator~(_Ios_Iostate __a)
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{ return _Ios_Iostate(~static_cast<int>(__a)); }
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enum _Ios_Seekdir { _M_ios_seekdir_end = 1L << 16 };
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// 27.4.2 Class ios_base
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class ios_base
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{
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public:
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// 27.4.2.1.1 Class ios_base::failure
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class failure : public exception
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{
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public:
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#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
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// Can't do exception(_msg) as defined in 27.4.2.1.1
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explicit
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failure(const string& __str) throw();
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virtual
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~failure() throw();
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virtual const char*
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what() const throw();
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private:
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enum { _M_bufsize = 256 };
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char _M_name[_M_bufsize];
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#endif
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};
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// 27.4.2.1.2 Type ios_base::fmtflags
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typedef _Ios_Fmtflags fmtflags;
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// 27.4.2.1.2 Type fmtflags
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static const fmtflags boolalpha = fmtflags(__ios_flags::_S_boolalpha);
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static const fmtflags dec = fmtflags(__ios_flags::_S_dec);
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static const fmtflags fixed = fmtflags(__ios_flags::_S_fixed);
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static const fmtflags hex = fmtflags(__ios_flags::_S_hex);
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static const fmtflags internal = fmtflags(__ios_flags::_S_internal);
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static const fmtflags left = fmtflags(__ios_flags::_S_left);
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static const fmtflags oct = fmtflags(__ios_flags::_S_oct);
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static const fmtflags right = fmtflags(__ios_flags::_S_right);
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static const fmtflags scientific = fmtflags(__ios_flags::_S_scientific);
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static const fmtflags showbase = fmtflags(__ios_flags::_S_showbase);
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static const fmtflags showpoint = fmtflags(__ios_flags::_S_showpoint);
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static const fmtflags showpos = fmtflags(__ios_flags::_S_showpos);
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static const fmtflags skipws = fmtflags(__ios_flags::_S_skipws);
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static const fmtflags unitbuf = fmtflags(__ios_flags::_S_unitbuf);
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static const fmtflags uppercase = fmtflags(__ios_flags::_S_uppercase);
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static const fmtflags adjustfield = fmtflags(__ios_flags::_S_adjustfield);
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static const fmtflags basefield = fmtflags(__ios_flags::_S_basefield);
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static const fmtflags floatfield = fmtflags(__ios_flags::_S_floatfield);
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// 27.4.2.1.3 Type ios_base::iostate
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typedef _Ios_Iostate iostate;
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static const iostate badbit = iostate(__ios_flags::_S_badbit);
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static const iostate eofbit = iostate(__ios_flags::_S_eofbit);
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static const iostate failbit = iostate(__ios_flags::_S_failbit);
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static const iostate goodbit = iostate(0);
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// 27.4.2.1.4 Type openmode
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typedef _Ios_Openmode openmode;
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static const openmode app = openmode(__ios_flags::_S_app);
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static const openmode ate = openmode(__ios_flags::_S_ate);
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static const openmode binary = openmode(__ios_flags::_S_bin);
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static const openmode in = openmode(__ios_flags::_S_in);
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static const openmode out = openmode(__ios_flags::_S_out);
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static const openmode trunc = openmode(__ios_flags::_S_trunc);
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// 27.4.2.1.5 Type seekdir
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typedef _Ios_Seekdir seekdir;
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static const seekdir beg = seekdir(0);
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static const seekdir cur = seekdir(SEEK_CUR);
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static const seekdir end = seekdir(SEEK_END);
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#ifdef _GLIBCPP_DEPRECATED
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typedef int io_state;
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typedef int open_mode;
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typedef int seek_dir;
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#endif
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// Callbacks;
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enum event
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{
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erase_event,
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imbue_event,
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copyfmt_event
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};
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typedef void (*event_callback) (event, ios_base&, int);
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void
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register_callback(event_callback __fn, int __index);
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protected:
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// Data Members
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streamsize _M_precision;
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streamsize _M_width;
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fmtflags _M_flags;
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// 27.4.2.6 Members for callbacks
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// 27.4.2.6 ios_base callbacks
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struct _Callback_list
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{
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// Data Members
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_Callback_list* _M_next;
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ios_base::event_callback _M_fn;
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int _M_index;
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int _M_refcount; // 0 means one reference.
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_Callback_list(ios_base::event_callback __fn, int __index,
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_Callback_list* __cb)
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: _M_next(__cb), _M_fn(__fn), _M_index(__index), _M_refcount(0) { }
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void
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_M_add_reference() { ++_M_refcount; } // XXX MT
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int
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_M_remove_reference() { return _M_refcount--; } // 0 => OK to delete
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};
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_Callback_list* _M_callbacks;
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void
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_M_call_callbacks(event __ev) throw();
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void
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_M_dispose_callbacks(void);
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// 27.4.2.5 Members for iword/pword storage
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struct _Words
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{
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void* _M_pword;
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long _M_iword;
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};
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static const int _S_local_words = 8;
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_Words _M_word_array[_S_local_words]; // Guaranteed storage
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_Words _M_dummy; // Only for failed iword/pword calls.
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_Words* _M_words;
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int _M_word_limit;
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_Words&
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_M_grow_words(int __index);
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// Members for locale and locale caching.
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locale _M_ios_locale;
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void
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_M_init();
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public:
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// 27.4.2.1.6 Class ios_base::Init
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// Used to initialize standard streams. In theory, g++ could use
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// -finit-priority to order this stuff correctly without going
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// through these machinations.
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class Init
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{
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friend class ios_base;
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public:
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Init();
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~Init();
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private:
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static int _S_ios_base_init;
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static bool _S_synced_with_stdio;
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filebuf* _M_cout;
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filebuf* _M_cin;
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filebuf* _M_cerr;
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#ifdef _GLIBCPP_USE_WCHAR_T
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wfilebuf* _M_wcout;
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wfilebuf* _M_wcin;
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wfilebuf* _M_wcerr;
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#endif
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};
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// Fmtflags state:
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inline fmtflags
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flags() const { return _M_flags; }
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inline fmtflags
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flags(fmtflags __fmtfl)
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{
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fmtflags __old = _M_flags;
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_M_flags = __fmtfl;
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return __old;
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}
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inline fmtflags
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setf(fmtflags __fmtfl)
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{
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fmtflags __old = _M_flags;
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_M_flags |= __fmtfl;
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return __old;
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}
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inline fmtflags
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setf(fmtflags __fmtfl, fmtflags __mask)
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{
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fmtflags __old = _M_flags;
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_M_flags &= ~__mask;
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_M_flags |= (__fmtfl & __mask);
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return __old;
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}
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inline void
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unsetf(fmtflags __mask) { _M_flags &= ~__mask; }
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inline streamsize
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precision() const { return _M_precision; }
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inline streamsize
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precision(streamsize __prec)
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{
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streamsize __old = _M_precision;
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_M_precision = __prec;
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return __old;
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}
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inline streamsize
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width() const { return _M_width; }
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inline streamsize
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width(streamsize __wide)
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{
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streamsize __old = _M_width;
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_M_width = __wide;
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return __old;
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}
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static bool
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sync_with_stdio(bool __sync = true);
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// Locales:
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locale
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imbue(const locale& __loc);
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inline locale
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getloc() const { return _M_ios_locale; }
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// Storage:
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static int
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xalloc() throw();
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inline long&
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iword(int __ix)
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{
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_Words& __word = (__ix < _M_word_limit)
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? _M_words[__ix] : _M_grow_words(__ix);
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return __word._M_iword;
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}
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inline void*&
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pword(int __ix)
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{
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_Words& __word = (__ix < _M_word_limit)
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? _M_words[__ix] : _M_grow_words(__ix);
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return __word._M_pword;
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}
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// Destructor
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~ios_base();
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protected:
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ios_base();
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#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
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private:
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ios_base(const ios_base&);
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ios_base&
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operator=(const ios_base&);
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#endif
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};
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// 27.4.5.1 fmtflags manipulators:
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inline ios_base&
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boolalpha(ios_base& __base)
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{
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__base.setf(ios_base::boolalpha);
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return __base;
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}
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inline ios_base&
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noboolalpha(ios_base& __base)
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{
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__base.unsetf(ios_base::boolalpha);
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return __base;
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}
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inline ios_base&
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showbase(ios_base& __base)
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{
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__base.setf(ios_base::showbase);
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return __base;
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}
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inline ios_base&
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noshowbase(ios_base& __base)
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{
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__base.unsetf(ios_base::showbase);
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return __base;
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}
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inline ios_base&
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showpoint(ios_base& __base)
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{
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__base.setf(ios_base::showpoint);
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return __base;
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}
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inline ios_base&
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noshowpoint(ios_base& __base)
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{
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__base.unsetf(ios_base::showpoint);
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return __base;
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}
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inline ios_base&
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showpos(ios_base& __base)
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{
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__base.setf(ios_base::showpos);
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return __base;
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}
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inline ios_base&
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noshowpos(ios_base& __base)
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{
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__base.unsetf(ios_base::showpos);
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return __base;
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}
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inline ios_base&
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skipws(ios_base& __base)
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{
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__base.setf(ios_base::skipws);
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return __base;
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}
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inline ios_base&
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noskipws(ios_base& __base)
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{
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__base.unsetf(ios_base::skipws);
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return __base;
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}
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inline ios_base&
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uppercase(ios_base& __base)
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{
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__base.setf(ios_base::uppercase);
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return __base;
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}
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inline ios_base&
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nouppercase(ios_base& __base)
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{
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__base.unsetf(ios_base::uppercase);
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return __base;
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}
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inline ios_base&
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unitbuf(ios_base& __base)
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{
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__base.setf(ios_base::unitbuf);
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return __base;
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}
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inline ios_base&
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nounitbuf(ios_base& __base)
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{
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__base.unsetf(ios_base::unitbuf);
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return __base;
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}
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// 27.4.5.2 adjustfield anipulators:
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inline ios_base&
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internal(ios_base& __base)
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{
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__base.setf(ios_base::internal, ios_base::adjustfield);
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return __base;
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}
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inline ios_base&
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left(ios_base& __base)
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{
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__base.setf(ios_base::left, ios_base::adjustfield);
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return __base;
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}
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inline ios_base&
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right(ios_base& __base)
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{
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__base.setf(ios_base::right, ios_base::adjustfield);
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|
return __base;
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|
}
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|
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|
// 27.4.5.3 basefield anipulators:
|
|
inline ios_base&
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|
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 */
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|
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