2012-03-27 23:13:14 +00:00
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// Iostreams base classes -*- C++ -*-
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2019-06-02 15:48:37 +00:00
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// Copyright (C) 1997-2019 Free Software Foundation, Inc.
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2012-03-27 23:13:14 +00:00
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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 3, 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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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/** @file bits/ios_base.h
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* This is an internal header file, included by other library headers.
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* Do not attempt to use it directly. @headername{ios}
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*/
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//
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// ISO C++ 14882: 27.4 Iostreams base classes
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//
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#ifndef _IOS_BASE_H
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#define _IOS_BASE_H 1
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#pragma GCC system_header
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#include <ext/atomicity.h>
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#include <bits/localefwd.h>
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#include <bits/locale_classes.h>
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2015-08-28 15:33:40 +00:00
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#if __cplusplus < 201103L
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# include <stdexcept>
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#else
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# include <system_error>
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#endif
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2012-03-27 23:13:14 +00:00
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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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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2017-10-07 00:16:47 +00:00
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// better type safety in iostream calls. A side effect is that in C++98
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// expressions involving them are not compile-time constants.
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2012-03-27 23:13:14 +00:00
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enum _Ios_Fmtflags
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{
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_S_boolalpha = 1L << 0,
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_S_dec = 1L << 1,
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_S_fixed = 1L << 2,
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_S_hex = 1L << 3,
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_S_internal = 1L << 4,
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_S_left = 1L << 5,
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_S_oct = 1L << 6,
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_S_right = 1L << 7,
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_S_scientific = 1L << 8,
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_S_showbase = 1L << 9,
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_S_showpoint = 1L << 10,
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_S_showpos = 1L << 11,
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_S_skipws = 1L << 12,
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_S_unitbuf = 1L << 13,
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_S_uppercase = 1L << 14,
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_S_adjustfield = _S_left | _S_right | _S_internal,
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_S_basefield = _S_dec | _S_oct | _S_hex,
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_S_floatfield = _S_scientific | _S_fixed,
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2017-04-10 11:32:00 +00:00
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_S_ios_fmtflags_end = 1L << 16,
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_S_ios_fmtflags_max = __INT_MAX__,
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_S_ios_fmtflags_min = ~__INT_MAX__
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2012-03-27 23:13:14 +00:00
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};
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inline _GLIBCXX_CONSTEXPR _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 _GLIBCXX_CONSTEXPR _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 _GLIBCXX_CONSTEXPR _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 _GLIBCXX_CONSTEXPR _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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inline const _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 const _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 const _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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enum _Ios_Openmode
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{
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_S_app = 1L << 0,
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_S_ate = 1L << 1,
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_S_bin = 1L << 2,
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_S_in = 1L << 3,
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_S_out = 1L << 4,
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_S_trunc = 1L << 5,
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2017-04-10 11:32:00 +00:00
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_S_ios_openmode_end = 1L << 16,
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_S_ios_openmode_max = __INT_MAX__,
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_S_ios_openmode_min = ~__INT_MAX__
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2012-03-27 23:13:14 +00:00
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};
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inline _GLIBCXX_CONSTEXPR _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 _GLIBCXX_CONSTEXPR _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 _GLIBCXX_CONSTEXPR _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 _GLIBCXX_CONSTEXPR _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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inline const _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 const _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 const _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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enum _Ios_Iostate
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{
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_S_goodbit = 0,
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_S_badbit = 1L << 0,
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_S_eofbit = 1L << 1,
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_S_failbit = 1L << 2,
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2017-04-10 11:32:00 +00:00
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_S_ios_iostate_end = 1L << 16,
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_S_ios_iostate_max = __INT_MAX__,
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_S_ios_iostate_min = ~__INT_MAX__
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2012-03-27 23:13:14 +00:00
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};
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inline _GLIBCXX_CONSTEXPR _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 _GLIBCXX_CONSTEXPR _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 _GLIBCXX_CONSTEXPR _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 _GLIBCXX_CONSTEXPR _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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inline const _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 const _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 const _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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enum _Ios_Seekdir
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{
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_S_beg = 0,
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_S_cur = _GLIBCXX_STDIO_SEEK_CUR,
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_S_end = _GLIBCXX_STDIO_SEEK_END,
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_S_ios_seekdir_end = 1L << 16
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};
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2015-08-28 15:33:40 +00:00
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#if __cplusplus >= 201103L
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/// I/O error code
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enum class io_errc { stream = 1 };
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template <> struct is_error_code_enum<io_errc> : public true_type { };
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const error_category& iostream_category() noexcept;
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inline error_code
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2017-10-07 00:16:47 +00:00
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make_error_code(io_errc __e) noexcept
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{ return error_code(static_cast<int>(__e), iostream_category()); }
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2015-08-28 15:33:40 +00:00
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inline error_condition
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2017-10-07 00:16:47 +00:00
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make_error_condition(io_errc __e) noexcept
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{ return error_condition(static_cast<int>(__e), iostream_category()); }
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2015-08-28 15:33:40 +00:00
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#endif
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2012-03-27 23:13:14 +00:00
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// 27.4.2 Class ios_base
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/**
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* @brief The base of the I/O class hierarchy.
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* @ingroup io
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*
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* This class defines everything that can be defined about I/O that does
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* not depend on the type of characters being input or output. Most
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* people will only see @c ios_base when they need to specify the full
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* name of the various I/O flags (e.g., the openmodes).
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*/
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class ios_base
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{
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2015-08-28 15:33:40 +00:00
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#if _GLIBCXX_USE_CXX11_ABI
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#if __cplusplus < 201103L
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// Type that is layout-compatible with std::system_error
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struct system_error : std::runtime_error
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{
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// Type that is layout-compatible with std::error_code
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struct error_code
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{
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error_code() { }
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private:
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int _M_value;
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const void* _M_cat;
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} _M_code;
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};
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#endif
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#endif
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2012-03-27 23:13:14 +00:00
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public:
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/**
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* @brief These are thrown to indicate problems with io.
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* @ingroup exceptions
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*
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* 27.4.2.1.1 Class ios_base::failure
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*/
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2015-08-28 15:33:40 +00:00
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#if _GLIBCXX_USE_CXX11_ABI
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class _GLIBCXX_ABI_TAG_CXX11 failure : public system_error
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{
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public:
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explicit
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failure(const string& __str);
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#if __cplusplus >= 201103L
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explicit
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failure(const string&, const error_code&);
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explicit
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failure(const char*, const error_code& = io_errc::stream);
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#endif
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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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};
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#else
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2012-03-27 23:13:14 +00:00
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class failure : public exception
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{
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public:
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// 48. Use of non-existent exception constructor
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explicit
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failure(const string& __str) throw();
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// This declaration is not useless:
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// http://gcc.gnu.org/onlinedocs/gcc-4.3.2/gcc/Vague-Linkage.html
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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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string _M_msg;
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};
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2015-08-28 15:33:40 +00:00
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#endif
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2012-03-27 23:13:14 +00:00
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// 27.4.2.1.2 Type ios_base::fmtflags
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/**
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* @brief This is a bitmask type.
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*
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* @c @a _Ios_Fmtflags is implementation-defined, but it is valid to
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* perform bitwise operations on these values and expect the Right
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* Thing to happen. Defined objects of type fmtflags are:
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* - boolalpha
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* - dec
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* - fixed
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* - hex
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* - internal
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* - left
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* - oct
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* - right
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* - scientific
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* - showbase
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* - showpoint
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* - showpos
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* - skipws
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* - unitbuf
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* - uppercase
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* - adjustfield
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* - basefield
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* - floatfield
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*/
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typedef _Ios_Fmtflags fmtflags;
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/// Insert/extract @c bool in alphabetic rather than numeric format.
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static const fmtflags boolalpha = _S_boolalpha;
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/// Converts integer input or generates integer output in decimal base.
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static const fmtflags dec = _S_dec;
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/// Generate floating-point output in fixed-point notation.
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static const fmtflags fixed = _S_fixed;
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/// Converts integer input or generates integer output in hexadecimal base.
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static const fmtflags hex = _S_hex;
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/// Adds fill characters at a designated internal point in certain
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/// generated output, or identical to @c right if no such point is
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/// designated.
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static const fmtflags internal = _S_internal;
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/// Adds fill characters on the right (final positions) of certain
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/// generated output. (I.e., the thing you print is flush left.)
|
|
|
|
static const fmtflags left = _S_left;
|
|
|
|
|
|
|
|
/// Converts integer input or generates integer output in octal base.
|
|
|
|
static const fmtflags oct = _S_oct;
|
|
|
|
|
|
|
|
/// Adds fill characters on the left (initial positions) of certain
|
|
|
|
/// generated output. (I.e., the thing you print is flush right.)
|
|
|
|
static const fmtflags right = _S_right;
|
|
|
|
|
|
|
|
/// Generates floating-point output in scientific notation.
|
|
|
|
static const fmtflags scientific = _S_scientific;
|
|
|
|
|
|
|
|
/// Generates a prefix indicating the numeric base of generated integer
|
|
|
|
/// output.
|
|
|
|
static const fmtflags showbase = _S_showbase;
|
|
|
|
|
|
|
|
/// Generates a decimal-point character unconditionally in generated
|
|
|
|
/// floating-point output.
|
|
|
|
static const fmtflags showpoint = _S_showpoint;
|
|
|
|
|
|
|
|
/// Generates a + sign in non-negative generated numeric output.
|
|
|
|
static const fmtflags showpos = _S_showpos;
|
|
|
|
|
|
|
|
/// Skips leading white space before certain input operations.
|
|
|
|
static const fmtflags skipws = _S_skipws;
|
|
|
|
|
|
|
|
/// Flushes output after each output operation.
|
|
|
|
static const fmtflags unitbuf = _S_unitbuf;
|
|
|
|
|
|
|
|
/// Replaces certain lowercase letters with their uppercase equivalents
|
|
|
|
/// in generated output.
|
|
|
|
static const fmtflags uppercase = _S_uppercase;
|
|
|
|
|
|
|
|
/// A mask of left|right|internal. Useful for the 2-arg form of @c setf.
|
|
|
|
static const fmtflags adjustfield = _S_adjustfield;
|
|
|
|
|
|
|
|
/// A mask of dec|oct|hex. Useful for the 2-arg form of @c setf.
|
|
|
|
static const fmtflags basefield = _S_basefield;
|
|
|
|
|
|
|
|
/// A mask of scientific|fixed. Useful for the 2-arg form of @c setf.
|
|
|
|
static const fmtflags floatfield = _S_floatfield;
|
|
|
|
|
|
|
|
// 27.4.2.1.3 Type ios_base::iostate
|
|
|
|
/**
|
|
|
|
* @brief This is a bitmask type.
|
|
|
|
*
|
|
|
|
* @c @a _Ios_Iostate is implementation-defined, but it is valid to
|
|
|
|
* perform bitwise operations on these values and expect the Right
|
|
|
|
* Thing to happen. Defined objects of type iostate are:
|
|
|
|
* - badbit
|
|
|
|
* - eofbit
|
|
|
|
* - failbit
|
|
|
|
* - goodbit
|
|
|
|
*/
|
|
|
|
typedef _Ios_Iostate iostate;
|
|
|
|
|
|
|
|
/// Indicates a loss of integrity in an input or output sequence (such
|
|
|
|
/// as an irrecoverable read error from a file).
|
|
|
|
static const iostate badbit = _S_badbit;
|
|
|
|
|
|
|
|
/// Indicates that an input operation reached the end of an input sequence.
|
|
|
|
static const iostate eofbit = _S_eofbit;
|
|
|
|
|
|
|
|
/// Indicates that an input operation failed to read the expected
|
|
|
|
/// characters, or that an output operation failed to generate the
|
|
|
|
/// desired characters.
|
|
|
|
static const iostate failbit = _S_failbit;
|
|
|
|
|
|
|
|
/// Indicates all is well.
|
|
|
|
static const iostate goodbit = _S_goodbit;
|
|
|
|
|
|
|
|
// 27.4.2.1.4 Type ios_base::openmode
|
|
|
|
/**
|
|
|
|
* @brief This is a bitmask type.
|
|
|
|
*
|
|
|
|
* @c @a _Ios_Openmode is implementation-defined, but it is valid to
|
|
|
|
* perform bitwise operations on these values and expect the Right
|
|
|
|
* Thing to happen. Defined objects of type openmode are:
|
|
|
|
* - app
|
|
|
|
* - ate
|
|
|
|
* - binary
|
|
|
|
* - in
|
|
|
|
* - out
|
|
|
|
* - trunc
|
|
|
|
*/
|
|
|
|
typedef _Ios_Openmode openmode;
|
|
|
|
|
|
|
|
/// Seek to end before each write.
|
|
|
|
static const openmode app = _S_app;
|
|
|
|
|
|
|
|
/// Open and seek to end immediately after opening.
|
|
|
|
static const openmode ate = _S_ate;
|
|
|
|
|
|
|
|
/// Perform input and output in binary mode (as opposed to text mode).
|
|
|
|
/// This is probably not what you think it is; see
|
2015-08-28 15:33:40 +00:00
|
|
|
/// https://gcc.gnu.org/onlinedocs/libstdc++/manual/fstreams.html#std.io.filestreams.binary
|
2012-03-27 23:13:14 +00:00
|
|
|
static const openmode binary = _S_bin;
|
|
|
|
|
|
|
|
/// Open for input. Default for @c ifstream and fstream.
|
|
|
|
static const openmode in = _S_in;
|
|
|
|
|
|
|
|
/// Open for output. Default for @c ofstream and fstream.
|
|
|
|
static const openmode out = _S_out;
|
|
|
|
|
|
|
|
/// Open for input. Default for @c ofstream.
|
|
|
|
static const openmode trunc = _S_trunc;
|
|
|
|
|
|
|
|
// 27.4.2.1.5 Type ios_base::seekdir
|
|
|
|
/**
|
|
|
|
* @brief This is an enumerated type.
|
|
|
|
*
|
|
|
|
* @c @a _Ios_Seekdir is implementation-defined. Defined values
|
|
|
|
* of type seekdir are:
|
|
|
|
* - beg
|
|
|
|
* - cur, equivalent to @c SEEK_CUR in the C standard library.
|
|
|
|
* - end, equivalent to @c SEEK_END in the C standard library.
|
|
|
|
*/
|
|
|
|
typedef _Ios_Seekdir seekdir;
|
|
|
|
|
|
|
|
/// Request a seek relative to the beginning of the stream.
|
|
|
|
static const seekdir beg = _S_beg;
|
|
|
|
|
|
|
|
/// Request a seek relative to the current position within the sequence.
|
|
|
|
static const seekdir cur = _S_cur;
|
|
|
|
|
|
|
|
/// Request a seek relative to the current end of the sequence.
|
|
|
|
static const seekdir end = _S_end;
|
|
|
|
|
2018-12-28 15:30:48 +00:00
|
|
|
#if __cplusplus <= 201402L
|
|
|
|
// Annex D.6 (removed in C++17)
|
2012-03-27 23:13:14 +00:00
|
|
|
typedef int io_state;
|
|
|
|
typedef int open_mode;
|
|
|
|
typedef int seek_dir;
|
|
|
|
|
|
|
|
typedef std::streampos streampos;
|
|
|
|
typedef std::streamoff streamoff;
|
2018-12-28 15:30:48 +00:00
|
|
|
#endif
|
2012-03-27 23:13:14 +00:00
|
|
|
|
|
|
|
// Callbacks;
|
|
|
|
/**
|
|
|
|
* @brief The set of events that may be passed to an event callback.
|
|
|
|
*
|
|
|
|
* erase_event is used during ~ios() and copyfmt(). imbue_event is used
|
|
|
|
* during imbue(). copyfmt_event is used during copyfmt().
|
|
|
|
*/
|
|
|
|
enum event
|
|
|
|
{
|
|
|
|
erase_event,
|
|
|
|
imbue_event,
|
|
|
|
copyfmt_event
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief The type of an event callback function.
|
|
|
|
* @param __e One of the members of the event enum.
|
|
|
|
* @param __b Reference to the ios_base object.
|
|
|
|
* @param __i The integer provided when the callback was registered.
|
|
|
|
*
|
|
|
|
* Event callbacks are user defined functions that get called during
|
|
|
|
* several ios_base and basic_ios functions, specifically imbue(),
|
|
|
|
* copyfmt(), and ~ios().
|
|
|
|
*/
|
|
|
|
typedef void (*event_callback) (event __e, ios_base& __b, int __i);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Add the callback __fn with parameter __index.
|
|
|
|
* @param __fn The function to add.
|
|
|
|
* @param __index The integer to pass to the function when invoked.
|
|
|
|
*
|
|
|
|
* Registers a function as an event callback with an integer parameter to
|
|
|
|
* be passed to the function when invoked. Multiple copies of the
|
|
|
|
* function are allowed. If there are multiple callbacks, they are
|
|
|
|
* invoked in the order they were registered.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
register_callback(event_callback __fn, int __index);
|
|
|
|
|
|
|
|
protected:
|
|
|
|
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() { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); }
|
|
|
|
|
|
|
|
// 0 => OK to delete.
|
|
|
|
int
|
|
|
|
_M_remove_reference()
|
|
|
|
{
|
|
|
|
// Be race-detector-friendly. For more info see bits/c++config.
|
|
|
|
_GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_refcount);
|
|
|
|
int __res = __gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1);
|
|
|
|
if (__res == 0)
|
|
|
|
{
|
|
|
|
_GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_refcount);
|
|
|
|
}
|
|
|
|
return __res;
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
_Callback_list* _M_callbacks;
|
|
|
|
|
|
|
|
void
|
|
|
|
_M_call_callbacks(event __ev) throw();
|
|
|
|
|
|
|
|
void
|
|
|
|
_M_dispose_callbacks(void) throw();
|
|
|
|
|
|
|
|
// 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.
|
|
|
|
// The first 5 iword and pword slots are reserved for internal use.
|
|
|
|
enum { _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, bool __iword);
|
|
|
|
|
|
|
|
// Members for locale and locale caching.
|
|
|
|
locale _M_ios_locale;
|
|
|
|
|
|
|
|
void
|
|
|
|
_M_init() throw();
|
|
|
|
|
|
|
|
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();
|
|
|
|
|
2019-06-02 15:48:37 +00:00
|
|
|
#if __cplusplus >= 201103L
|
|
|
|
Init(const Init&) = default;
|
|
|
|
Init& operator=(const Init&) = default;
|
|
|
|
#endif
|
|
|
|
|
2012-03-27 23:13:14 +00:00
|
|
|
private:
|
|
|
|
static _Atomic_word _S_refcount;
|
|
|
|
static bool _S_synced_with_stdio;
|
|
|
|
};
|
|
|
|
|
|
|
|
// [27.4.2.2] fmtflags state functions
|
|
|
|
/**
|
|
|
|
* @brief Access to format flags.
|
|
|
|
* @return The format control flags for both input and output.
|
|
|
|
*/
|
|
|
|
fmtflags
|
|
|
|
flags() const
|
|
|
|
{ return _M_flags; }
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Setting new format flags all at once.
|
|
|
|
* @param __fmtfl The new flags to set.
|
|
|
|
* @return The previous format control flags.
|
|
|
|
*
|
|
|
|
* This function overwrites all the format flags with @a __fmtfl.
|
|
|
|
*/
|
|
|
|
fmtflags
|
|
|
|
flags(fmtflags __fmtfl)
|
|
|
|
{
|
|
|
|
fmtflags __old = _M_flags;
|
|
|
|
_M_flags = __fmtfl;
|
|
|
|
return __old;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Setting new format flags.
|
|
|
|
* @param __fmtfl Additional flags to set.
|
|
|
|
* @return The previous format control flags.
|
|
|
|
*
|
|
|
|
* This function sets additional flags in format control. Flags that
|
|
|
|
* were previously set remain set.
|
|
|
|
*/
|
|
|
|
fmtflags
|
|
|
|
setf(fmtflags __fmtfl)
|
|
|
|
{
|
|
|
|
fmtflags __old = _M_flags;
|
|
|
|
_M_flags |= __fmtfl;
|
|
|
|
return __old;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Setting new format flags.
|
|
|
|
* @param __fmtfl Additional flags to set.
|
|
|
|
* @param __mask The flags mask for @a fmtfl.
|
|
|
|
* @return The previous format control flags.
|
|
|
|
*
|
|
|
|
* This function clears @a mask in the format flags, then sets
|
|
|
|
* @a fmtfl @c & @a mask. An example mask is @c ios_base::adjustfield.
|
|
|
|
*/
|
|
|
|
fmtflags
|
|
|
|
setf(fmtflags __fmtfl, fmtflags __mask)
|
|
|
|
{
|
|
|
|
fmtflags __old = _M_flags;
|
|
|
|
_M_flags &= ~__mask;
|
|
|
|
_M_flags |= (__fmtfl & __mask);
|
|
|
|
return __old;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Clearing format flags.
|
|
|
|
* @param __mask The flags to unset.
|
|
|
|
*
|
|
|
|
* This function clears @a __mask in the format flags.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
unsetf(fmtflags __mask)
|
|
|
|
{ _M_flags &= ~__mask; }
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Flags access.
|
|
|
|
* @return The precision to generate on certain output operations.
|
|
|
|
*
|
|
|
|
* Be careful if you try to give a definition of @a precision here; see
|
|
|
|
* DR 189.
|
|
|
|
*/
|
|
|
|
streamsize
|
|
|
|
precision() const
|
|
|
|
{ return _M_precision; }
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Changing flags.
|
|
|
|
* @param __prec The new precision value.
|
|
|
|
* @return The previous value of precision().
|
|
|
|
*/
|
|
|
|
streamsize
|
|
|
|
precision(streamsize __prec)
|
|
|
|
{
|
|
|
|
streamsize __old = _M_precision;
|
|
|
|
_M_precision = __prec;
|
|
|
|
return __old;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Flags access.
|
|
|
|
* @return The minimum field width to generate on output operations.
|
|
|
|
*
|
|
|
|
* <em>Minimum field width</em> refers to the number of characters.
|
|
|
|
*/
|
|
|
|
streamsize
|
|
|
|
width() const
|
|
|
|
{ return _M_width; }
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Changing flags.
|
|
|
|
* @param __wide The new width value.
|
|
|
|
* @return The previous value of width().
|
|
|
|
*/
|
|
|
|
streamsize
|
|
|
|
width(streamsize __wide)
|
|
|
|
{
|
|
|
|
streamsize __old = _M_width;
|
|
|
|
_M_width = __wide;
|
|
|
|
return __old;
|
|
|
|
}
|
|
|
|
|
|
|
|
// [27.4.2.4] ios_base static members
|
|
|
|
/**
|
|
|
|
* @brief Interaction with the standard C I/O objects.
|
|
|
|
* @param __sync Whether to synchronize or not.
|
|
|
|
* @return True if the standard streams were previously synchronized.
|
|
|
|
*
|
|
|
|
* The synchronization referred to is @e only that between the standard
|
|
|
|
* C facilities (e.g., stdout) and the standard C++ objects (e.g.,
|
|
|
|
* cout). User-declared streams are unaffected. See
|
2015-08-28 15:33:40 +00:00
|
|
|
* https://gcc.gnu.org/onlinedocs/libstdc++/manual/fstreams.html#std.io.filestreams.binary
|
2012-03-27 23:13:14 +00:00
|
|
|
*/
|
|
|
|
static bool
|
|
|
|
sync_with_stdio(bool __sync = true);
|
|
|
|
|
|
|
|
// [27.4.2.3] ios_base locale functions
|
|
|
|
/**
|
|
|
|
* @brief Setting a new locale.
|
|
|
|
* @param __loc The new locale.
|
|
|
|
* @return The previous locale.
|
|
|
|
*
|
|
|
|
* Sets the new locale for this stream, and then invokes each callback
|
|
|
|
* with imbue_event.
|
|
|
|
*/
|
|
|
|
locale
|
|
|
|
imbue(const locale& __loc) throw();
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Locale access
|
|
|
|
* @return A copy of the current locale.
|
|
|
|
*
|
|
|
|
* If @c imbue(loc) has previously been called, then this function
|
|
|
|
* returns @c loc. Otherwise, it returns a copy of @c std::locale(),
|
|
|
|
* the global C++ locale.
|
|
|
|
*/
|
|
|
|
locale
|
|
|
|
getloc() const
|
|
|
|
{ return _M_ios_locale; }
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Locale access
|
|
|
|
* @return A reference to the current locale.
|
|
|
|
*
|
|
|
|
* Like getloc above, but returns a reference instead of
|
|
|
|
* generating a copy.
|
|
|
|
*/
|
|
|
|
const locale&
|
|
|
|
_M_getloc() const
|
|
|
|
{ return _M_ios_locale; }
|
|
|
|
|
|
|
|
// [27.4.2.5] ios_base storage functions
|
|
|
|
/**
|
|
|
|
* @brief Access to unique indices.
|
|
|
|
* @return An integer different from all previous calls.
|
|
|
|
*
|
|
|
|
* This function returns a unique integer every time it is called. It
|
|
|
|
* can be used for any purpose, but is primarily intended to be a unique
|
|
|
|
* index for the iword and pword functions. The expectation is that an
|
|
|
|
* application calls xalloc in order to obtain an index in the iword and
|
|
|
|
* pword arrays that can be used without fear of conflict.
|
|
|
|
*
|
|
|
|
* The implementation maintains a static variable that is incremented and
|
|
|
|
* returned on each invocation. xalloc is guaranteed to return an index
|
|
|
|
* that is safe to use in the iword and pword arrays.
|
|
|
|
*/
|
|
|
|
static int
|
|
|
|
xalloc() throw();
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Access to integer array.
|
|
|
|
* @param __ix Index into the array.
|
|
|
|
* @return A reference to an integer associated with the index.
|
|
|
|
*
|
|
|
|
* The iword function provides access to an array of integers that can be
|
|
|
|
* used for any purpose. The array grows as required to hold the
|
|
|
|
* supplied index. All integers in the array are initialized to 0.
|
|
|
|
*
|
|
|
|
* The implementation reserves several indices. You should use xalloc to
|
|
|
|
* obtain an index that is safe to use. Also note that since the array
|
|
|
|
* can grow dynamically, it is not safe to hold onto the reference.
|
|
|
|
*/
|
|
|
|
long&
|
|
|
|
iword(int __ix)
|
|
|
|
{
|
2019-06-02 15:48:37 +00:00
|
|
|
_Words& __word = ((unsigned)__ix < (unsigned)_M_word_size)
|
2012-03-27 23:13:14 +00:00
|
|
|
? _M_word[__ix] : _M_grow_words(__ix, true);
|
|
|
|
return __word._M_iword;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief Access to void pointer array.
|
|
|
|
* @param __ix Index into the array.
|
|
|
|
* @return A reference to a void* associated with the index.
|
|
|
|
*
|
|
|
|
* The pword function provides access to an array of pointers that can be
|
|
|
|
* used for any purpose. The array grows as required to hold the
|
|
|
|
* supplied index. All pointers in the array are initialized to 0.
|
|
|
|
*
|
|
|
|
* The implementation reserves several indices. You should use xalloc to
|
|
|
|
* obtain an index that is safe to use. Also note that since the array
|
|
|
|
* can grow dynamically, it is not safe to hold onto the reference.
|
|
|
|
*/
|
|
|
|
void*&
|
|
|
|
pword(int __ix)
|
|
|
|
{
|
2019-06-02 15:48:37 +00:00
|
|
|
_Words& __word = ((unsigned)__ix < (unsigned)_M_word_size)
|
2012-03-27 23:13:14 +00:00
|
|
|
? _M_word[__ix] : _M_grow_words(__ix, false);
|
|
|
|
return __word._M_pword;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Destructor
|
|
|
|
/**
|
|
|
|
* Invokes each callback with erase_event. Destroys local storage.
|
|
|
|
*
|
|
|
|
* Note that the ios_base object for the standard streams never gets
|
|
|
|
* destroyed. As a result, any callbacks registered with the standard
|
|
|
|
* streams will not get invoked with erase_event (unless copyfmt is
|
|
|
|
* used).
|
|
|
|
*/
|
|
|
|
virtual ~ios_base();
|
|
|
|
|
|
|
|
protected:
|
|
|
|
ios_base() throw ();
|
|
|
|
|
2015-08-28 15:33:40 +00:00
|
|
|
#if __cplusplus < 201103L
|
2012-03-27 23:13:14 +00:00
|
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
|
|
// 50. Copy constructor and assignment operator of ios_base
|
|
|
|
private:
|
|
|
|
ios_base(const ios_base&);
|
|
|
|
|
|
|
|
ios_base&
|
|
|
|
operator=(const ios_base&);
|
2015-08-28 15:33:40 +00:00
|
|
|
#else
|
|
|
|
public:
|
|
|
|
ios_base(const ios_base&) = delete;
|
|
|
|
|
|
|
|
ios_base&
|
|
|
|
operator=(const ios_base&) = delete;
|
|
|
|
|
|
|
|
protected:
|
|
|
|
void
|
|
|
|
_M_move(ios_base&) noexcept;
|
|
|
|
|
|
|
|
void
|
|
|
|
_M_swap(ios_base& __rhs) noexcept;
|
|
|
|
#endif
|
2012-03-27 23:13:14 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
// [27.4.5.1] fmtflags manipulators
|
|
|
|
/// Calls base.setf(ios_base::boolalpha).
|
|
|
|
inline ios_base&
|
|
|
|
boolalpha(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.setf(ios_base::boolalpha);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Calls base.unsetf(ios_base::boolalpha).
|
|
|
|
inline ios_base&
|
|
|
|
noboolalpha(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.unsetf(ios_base::boolalpha);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Calls base.setf(ios_base::showbase).
|
|
|
|
inline ios_base&
|
|
|
|
showbase(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.setf(ios_base::showbase);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Calls base.unsetf(ios_base::showbase).
|
|
|
|
inline ios_base&
|
|
|
|
noshowbase(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.unsetf(ios_base::showbase);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Calls base.setf(ios_base::showpoint).
|
|
|
|
inline ios_base&
|
|
|
|
showpoint(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.setf(ios_base::showpoint);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Calls base.unsetf(ios_base::showpoint).
|
|
|
|
inline ios_base&
|
|
|
|
noshowpoint(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.unsetf(ios_base::showpoint);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Calls base.setf(ios_base::showpos).
|
|
|
|
inline ios_base&
|
|
|
|
showpos(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.setf(ios_base::showpos);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Calls base.unsetf(ios_base::showpos).
|
|
|
|
inline ios_base&
|
|
|
|
noshowpos(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.unsetf(ios_base::showpos);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Calls base.setf(ios_base::skipws).
|
|
|
|
inline ios_base&
|
|
|
|
skipws(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.setf(ios_base::skipws);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Calls base.unsetf(ios_base::skipws).
|
|
|
|
inline ios_base&
|
|
|
|
noskipws(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.unsetf(ios_base::skipws);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Calls base.setf(ios_base::uppercase).
|
|
|
|
inline ios_base&
|
|
|
|
uppercase(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.setf(ios_base::uppercase);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Calls base.unsetf(ios_base::uppercase).
|
|
|
|
inline ios_base&
|
|
|
|
nouppercase(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.unsetf(ios_base::uppercase);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Calls base.setf(ios_base::unitbuf).
|
|
|
|
inline ios_base&
|
|
|
|
unitbuf(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.setf(ios_base::unitbuf);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Calls base.unsetf(ios_base::unitbuf).
|
|
|
|
inline ios_base&
|
|
|
|
nounitbuf(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.unsetf(ios_base::unitbuf);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
// [27.4.5.2] adjustfield manipulators
|
|
|
|
/// Calls base.setf(ios_base::internal, ios_base::adjustfield).
|
|
|
|
inline ios_base&
|
|
|
|
internal(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.setf(ios_base::internal, ios_base::adjustfield);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Calls base.setf(ios_base::left, ios_base::adjustfield).
|
|
|
|
inline ios_base&
|
|
|
|
left(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.setf(ios_base::left, ios_base::adjustfield);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Calls base.setf(ios_base::right, ios_base::adjustfield).
|
|
|
|
inline ios_base&
|
|
|
|
right(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.setf(ios_base::right, ios_base::adjustfield);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
// [27.4.5.3] basefield manipulators
|
|
|
|
/// Calls base.setf(ios_base::dec, ios_base::basefield).
|
|
|
|
inline ios_base&
|
|
|
|
dec(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.setf(ios_base::dec, ios_base::basefield);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Calls base.setf(ios_base::hex, ios_base::basefield).
|
|
|
|
inline ios_base&
|
|
|
|
hex(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.setf(ios_base::hex, ios_base::basefield);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Calls base.setf(ios_base::oct, ios_base::basefield).
|
|
|
|
inline ios_base&
|
|
|
|
oct(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.setf(ios_base::oct, ios_base::basefield);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
// [27.4.5.4] floatfield manipulators
|
|
|
|
/// Calls base.setf(ios_base::fixed, ios_base::floatfield).
|
|
|
|
inline ios_base&
|
|
|
|
fixed(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.setf(ios_base::fixed, ios_base::floatfield);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Calls base.setf(ios_base::scientific, ios_base::floatfield).
|
|
|
|
inline ios_base&
|
|
|
|
scientific(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.setf(ios_base::scientific, ios_base::floatfield);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
2015-08-28 15:33:40 +00:00
|
|
|
#if __cplusplus >= 201103L
|
|
|
|
// New C++11 floatfield manipulators
|
|
|
|
|
|
|
|
/// Calls
|
|
|
|
/// base.setf(ios_base::fixed|ios_base::scientific, ios_base::floatfield)
|
|
|
|
inline ios_base&
|
|
|
|
hexfloat(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.setf(ios_base::fixed | ios_base::scientific, ios_base::floatfield);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Calls @c base.unsetf(ios_base::floatfield)
|
|
|
|
inline ios_base&
|
|
|
|
defaultfloat(ios_base& __base)
|
|
|
|
{
|
|
|
|
__base.unsetf(ios_base::floatfield);
|
|
|
|
return __base;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2012-03-27 23:13:14 +00:00
|
|
|
_GLIBCXX_END_NAMESPACE_VERSION
|
|
|
|
} // namespace
|
|
|
|
|
|
|
|
#endif /* _IOS_BASE_H */
|