// Iostreams base classes -*- C++ -*-
-// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
-// Free Software Foundation, Inc.
+// Copyright (C) 1997-2024 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)
+// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// 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.
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
-// 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.
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
-//
-// ISO C++ 14882: 27.8 File-based streams
-//
-
-/** @file ios_base.h
+/** @file bits/ios_base.h
* This is an internal header file, included by other library headers.
- * You should not attempt to use it directly.
+ * Do not attempt to use it directly. @headername{ios}
*/
+//
+// ISO C++ 14882: 27.4 Iostreams base classes
+//
+
#ifndef _IOS_BASE_H
#define _IOS_BASE_H 1
#pragma GCC system_header
-#include <bits/atomicity.h>
+#include <ext/atomicity.h>
#include <bits/localefwd.h>
#include <bits/locale_classes.h>
-namespace std
+#if __cplusplus < 201103L
+# include <stdexcept>
+#else
+# include <system_error>
+#endif
+
+namespace std _GLIBCXX_VISIBILITY(default)
{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
// 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 { _S_ios_fmtflags_end = 1L << 16 };
+ // better type safety in iostream calls. A side effect is that in C++98
+ // expressions involving them are not compile-time constants.
+ enum _Ios_Fmtflags
+ {
+ _S_boolalpha = 1L << 0,
+ _S_dec = 1L << 1,
+ _S_fixed = 1L << 2,
+ _S_hex = 1L << 3,
+ _S_internal = 1L << 4,
+ _S_left = 1L << 5,
+ _S_oct = 1L << 6,
+ _S_right = 1L << 7,
+ _S_scientific = 1L << 8,
+ _S_showbase = 1L << 9,
+ _S_showpoint = 1L << 10,
+ _S_showpos = 1L << 11,
+ _S_skipws = 1L << 12,
+ _S_unitbuf = 1L << 13,
+ _S_uppercase = 1L << 14,
+ _S_adjustfield = _S_left | _S_right | _S_internal,
+ _S_basefield = _S_dec | _S_oct | _S_hex,
+ _S_floatfield = _S_scientific | _S_fixed,
+ _S_ios_fmtflags_end = 1L << 16,
+ _S_ios_fmtflags_max = __INT_MAX__,
+ _S_ios_fmtflags_min = ~__INT_MAX__
+ };
- inline _Ios_Fmtflags
+ inline _GLIBCXX_CONSTEXPR _Ios_Fmtflags
operator&(_Ios_Fmtflags __a, _Ios_Fmtflags __b)
{ return _Ios_Fmtflags(static_cast<int>(__a) & static_cast<int>(__b)); }
- inline _Ios_Fmtflags
+ inline _GLIBCXX_CONSTEXPR _Ios_Fmtflags
operator|(_Ios_Fmtflags __a, _Ios_Fmtflags __b)
{ return _Ios_Fmtflags(static_cast<int>(__a) | static_cast<int>(__b)); }
- inline _Ios_Fmtflags
+ inline _GLIBCXX_CONSTEXPR _Ios_Fmtflags
operator^(_Ios_Fmtflags __a, _Ios_Fmtflags __b)
{ return _Ios_Fmtflags(static_cast<int>(__a) ^ static_cast<int>(__b)); }
- inline _Ios_Fmtflags
+ inline _GLIBCXX_CONSTEXPR _Ios_Fmtflags
+ operator~(_Ios_Fmtflags __a)
+ { return _Ios_Fmtflags(~static_cast<int>(__a)); }
+
+ inline const _Ios_Fmtflags&
operator|=(_Ios_Fmtflags& __a, _Ios_Fmtflags __b)
{ return __a = __a | __b; }
- inline _Ios_Fmtflags
+ inline const _Ios_Fmtflags&
operator&=(_Ios_Fmtflags& __a, _Ios_Fmtflags __b)
{ return __a = __a & __b; }
- inline _Ios_Fmtflags
+ inline const _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 { _S_ios_openmode_end = 1L << 16 };
+ enum _Ios_Openmode
+ {
+ _S_app = 1L << 0,
+ _S_ate = 1L << 1,
+ _S_bin = 1L << 2,
+ _S_in = 1L << 3,
+ _S_out = 1L << 4,
+ _S_trunc = 1L << 5,
+ _S_noreplace = 1L << 6,
+ _S_ios_openmode_end = 1L << 16,
+ _S_ios_openmode_max = __INT_MAX__,
+ _S_ios_openmode_min = ~__INT_MAX__
+ };
- inline _Ios_Openmode
+ inline _GLIBCXX_CONSTEXPR _Ios_Openmode
operator&(_Ios_Openmode __a, _Ios_Openmode __b)
{ return _Ios_Openmode(static_cast<int>(__a) & static_cast<int>(__b)); }
- inline _Ios_Openmode
+ inline _GLIBCXX_CONSTEXPR _Ios_Openmode
operator|(_Ios_Openmode __a, _Ios_Openmode __b)
{ return _Ios_Openmode(static_cast<int>(__a) | static_cast<int>(__b)); }
- inline _Ios_Openmode
+ inline _GLIBCXX_CONSTEXPR _Ios_Openmode
operator^(_Ios_Openmode __a, _Ios_Openmode __b)
{ return _Ios_Openmode(static_cast<int>(__a) ^ static_cast<int>(__b)); }
- inline _Ios_Openmode
+ inline _GLIBCXX_CONSTEXPR _Ios_Openmode
+ operator~(_Ios_Openmode __a)
+ { return _Ios_Openmode(~static_cast<int>(__a)); }
+
+ inline const _Ios_Openmode&
operator|=(_Ios_Openmode& __a, _Ios_Openmode __b)
{ return __a = __a | __b; }
- inline _Ios_Openmode
+ inline const _Ios_Openmode&
operator&=(_Ios_Openmode& __a, _Ios_Openmode __b)
{ return __a = __a & __b; }
- inline _Ios_Openmode
+ inline const _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
+ {
+ _S_goodbit = 0,
+ _S_badbit = 1L << 0,
+ _S_eofbit = 1L << 1,
+ _S_failbit = 1L << 2,
+ _S_ios_iostate_end = 1L << 16,
+ _S_ios_iostate_max = __INT_MAX__,
+ _S_ios_iostate_min = ~__INT_MAX__
+ };
- enum _Ios_Iostate { _S_ios_iostate_end = 1L << 16 };
-
- inline _Ios_Iostate
+ inline _GLIBCXX_CONSTEXPR _Ios_Iostate
operator&(_Ios_Iostate __a, _Ios_Iostate __b)
{ return _Ios_Iostate(static_cast<int>(__a) & static_cast<int>(__b)); }
- inline _Ios_Iostate
+ inline _GLIBCXX_CONSTEXPR _Ios_Iostate
operator|(_Ios_Iostate __a, _Ios_Iostate __b)
{ return _Ios_Iostate(static_cast<int>(__a) | static_cast<int>(__b)); }
- inline _Ios_Iostate
+ inline _GLIBCXX_CONSTEXPR _Ios_Iostate
operator^(_Ios_Iostate __a, _Ios_Iostate __b)
{ return _Ios_Iostate(static_cast<int>(__a) ^ static_cast<int>(__b)); }
- inline _Ios_Iostate
+ inline _GLIBCXX_CONSTEXPR _Ios_Iostate
+ operator~(_Ios_Iostate __a)
+ { return _Ios_Iostate(~static_cast<int>(__a)); }
+
+ inline const _Ios_Iostate&
operator|=(_Ios_Iostate& __a, _Ios_Iostate __b)
{ return __a = __a | __b; }
- inline _Ios_Iostate
+ inline const _Ios_Iostate&
operator&=(_Ios_Iostate& __a, _Ios_Iostate __b)
{ return __a = __a & __b; }
- inline _Ios_Iostate
+ inline const _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 { _S_ios_seekdir_end = 1L << 16 };
+ enum _Ios_Seekdir
+ {
+ _S_beg = 0,
+ _S_cur = _GLIBCXX_STDIO_SEEK_CUR,
+ _S_end = _GLIBCXX_STDIO_SEEK_END,
+ _S_ios_seekdir_end = 1L << 16
+ };
+
+#if __cplusplus >= 201103L
+ /// I/O error code
+ enum class io_errc { stream = 1 };
+
+ template <> struct is_error_code_enum<io_errc> : public true_type { };
+
+ [[__nodiscard__, __gnu__::__const__]]
+ const error_category&
+ iostream_category() noexcept;
+
+ [[__nodiscard__]]
+ inline error_code
+ make_error_code(io_errc __e) noexcept
+ { return error_code(static_cast<int>(__e), iostream_category()); }
+
+ [[__nodiscard__]]
+ inline error_condition
+ make_error_condition(io_errc __e) noexcept
+ { return error_condition(static_cast<int>(__e), iostream_category()); }
+#endif
// 27.4.2 Class ios_base
/**
- * @brief The very top of the I/O class hierarchy.
+ * @brief The base of the I/O class hierarchy.
+ * @ingroup io
*
* This class defines everything that can be defined about I/O that does
* not depend on the type of characters being input or output. Most
*/
class ios_base
{
+#if _GLIBCXX_USE_CXX11_ABI
+#if __cplusplus < 201103L
+ // Type that is layout-compatible with std::system_error
+ struct system_error : std::runtime_error
+ {
+ // Type that is layout-compatible with std::error_code
+ struct error_code
+ {
+ error_code() { }
+ private:
+ int _M_value;
+ const void* _M_cat;
+ } _M_code;
+ };
+#endif
+#endif
public:
-
- // 27.4.2.1.1 Class ios_base::failure
- /// These are thrown to indicate problems. Doc me.
+
+ /**
+ * @brief These are thrown to indicate problems with io.
+ * @ingroup exceptions
+ *
+ * 27.4.2.1.1 Class ios_base::failure
+ */
+#if _GLIBCXX_USE_CXX11_ABI
+ class _GLIBCXX_ABI_TAG_CXX11 failure : public system_error
+ {
+ public:
+ explicit
+ failure(const string& __str);
+
+#if __cplusplus >= 201103L
+ explicit
+ failure(const string&, const error_code&);
+
+ explicit
+ failure(const char*, const error_code& = io_errc::stream);
+#endif
+
+ virtual
+ ~failure() throw();
+
+ virtual const char*
+ what() const throw();
+ };
+#else
class failure : public exception
{
public:
-#ifdef _GLIBCXX_RESOLVE_LIB_DEFECTS
- //48. Use of non-existent exception constructor
- explicit
+ // _GLIBCXX_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
+ // http://gcc.gnu.org/onlinedocs/gcc-4.3.2/gcc/Vague-Linkage.html
+ virtual
~failure() throw();
virtual const char*
what() const throw();
-
- private:
- enum { _S_bufsize = 256 };
- char _M_name[_S_bufsize];
+
+#if __cplusplus >= 201103L
+ // Define the new members required by C++11,
+ // even though the error_code cannot be stored.
+
+ explicit
+ failure(const string& __s, const error_code&) noexcept
+ : failure(__s)
+ { }
+
+ explicit
+ failure(const char* __s, const error_code& = error_code{})
+ : failure(string(__s))
+ { }
+
+ // Stand-in for system_error::code() but returning by value.
+ error_code code() const noexcept { return error_code{}; }
#endif
+
+ private:
+ string _M_msg;
};
+#endif
// 27.4.2.1.2 Type ios_base::fmtflags
/**
* @brief This is a bitmask type.
*
- * @c "_Ios_Fmtflags" is implementation-defined, but it is valid to
+ * @c @a _Ios_Fmtflags 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 fmtflags are:
* - boolalpha
typedef _Ios_Fmtflags fmtflags;
/// Insert/extract @c bool in alphabetic rather than numeric format.
- static const fmtflags boolalpha = fmtflags(__ios_flags::_S_boolalpha);
+ static const fmtflags boolalpha = _S_boolalpha;
/// Converts integer input or generates integer output in decimal base.
- static const fmtflags dec = fmtflags(__ios_flags::_S_dec);
+ static const fmtflags dec = _S_dec;
/// Generate floating-point output in fixed-point notation.
- static const fmtflags fixed = fmtflags(__ios_flags::_S_fixed);
+ static const fmtflags fixed = _S_fixed;
/// Converts integer input or generates integer output in hexadecimal base.
- static const fmtflags hex = fmtflags(__ios_flags::_S_hex);
+ static const fmtflags hex = _S_hex;
/// Adds fill characters at a designated internal point in certain
/// generated output, or identical to @c right if no such point is
/// designated.
- static const fmtflags internal = fmtflags(__ios_flags::_S_internal);
+ static const fmtflags internal = _S_internal;
/// Adds fill characters on the right (final positions) of certain
/// generated output. (I.e., the thing you print is flush left.)
- static const fmtflags left = fmtflags(__ios_flags::_S_left);
+ static const fmtflags left = _S_left;
/// Converts integer input or generates integer output in octal base.
- static const fmtflags oct = fmtflags(__ios_flags::_S_oct);
+ 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 = fmtflags(__ios_flags::_S_right);
+ static const fmtflags right = _S_right;
/// Generates floating-point output in scientific notation.
- static const fmtflags scientific = fmtflags(__ios_flags::_S_scientific);
+ static const fmtflags scientific = _S_scientific;
/// Generates a prefix indicating the numeric base of generated integer
/// output.
- static const fmtflags showbase = fmtflags(__ios_flags::_S_showbase);
+ static const fmtflags showbase = _S_showbase;
/// Generates a decimal-point character unconditionally in generated
/// floating-point output.
- static const fmtflags showpoint = fmtflags(__ios_flags::_S_showpoint);
+ static const fmtflags showpoint = _S_showpoint;
/// Generates a + sign in non-negative generated numeric output.
- static const fmtflags showpos = fmtflags(__ios_flags::_S_showpos);
+ static const fmtflags showpos = _S_showpos;
/// Skips leading white space before certain input operations.
- static const fmtflags skipws = fmtflags(__ios_flags::_S_skipws);
+ static const fmtflags skipws = _S_skipws;
/// Flushes output after each output operation.
- static const fmtflags unitbuf = fmtflags(__ios_flags::_S_unitbuf);
+ static const fmtflags unitbuf = _S_unitbuf;
/// Replaces certain lowercase letters with their uppercase equivalents
/// in generated output.
- static const fmtflags uppercase = fmtflags(__ios_flags::_S_uppercase);
+ 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 = fmtflags(__ios_flags::_S_adjustfield);
+ 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 = fmtflags(__ios_flags::_S_basefield);
+ static const fmtflags basefield = _S_basefield;
/// A mask of scientific|fixed. Useful for the 2-arg form of @c setf.
- static const fmtflags floatfield = fmtflags(__ios_flags::_S_floatfield);
+ static const fmtflags floatfield = _S_floatfield;
// 27.4.2.1.3 Type ios_base::iostate
/**
* @brief This is a bitmask type.
*
- * @c "_Ios_Iostate" is implementation-defined, but it is valid to
+ * @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
/// Indicates a loss of integrity in an input or output sequence (such
/// as an irrecoverable read error from a file).
- static const iostate badbit = iostate(__ios_flags::_S_badbit);
+ static const iostate badbit = _S_badbit;
/// Indicates that an input operation reached the end of an input sequence.
- static const iostate eofbit = iostate(__ios_flags::_S_eofbit);
+ 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 = iostate(__ios_flags::_S_failbit);
+ static const iostate failbit = _S_failbit;
/// Indicates all is well.
- static const iostate goodbit = iostate(0);
+ static const iostate goodbit = _S_goodbit;
// 27.4.2.1.4 Type ios_base::openmode
/**
* @brief This is a bitmask type.
*
- * @c "_Ios_Openmode" is implementation-defined, but it is valid to
+ * @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
typedef _Ios_Openmode openmode;
/// Seek to end before each write.
- static const openmode app = openmode(__ios_flags::_S_app);
+ static const openmode app = _S_app;
/// Open and seek to end immediately after opening.
- static const openmode ate = openmode(__ios_flags::_S_ate);
+ 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
- /// http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#3 and
- /// http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#7 for more.
- static const openmode binary = openmode(__ios_flags::_S_bin);
+ /// https://gcc.gnu.org/onlinedocs/libstdc++/manual/fstreams.html#std.io.filestreams.binary
+ static const openmode binary = _S_bin;
/// Open for input. Default for @c ifstream and fstream.
- static const openmode in = openmode(__ios_flags::_S_in);
+ static const openmode in = _S_in;
/// Open for output. Default for @c ofstream and fstream.
- static const openmode out = openmode(__ios_flags::_S_out);
+ static const openmode out = _S_out;
+
+ /// Truncate an existing stream when opening. Default for @c ofstream.
+ static const openmode trunc = _S_trunc;
- /// Open for input. Default for @c ofstream.
- static const openmode trunc = openmode(__ios_flags::_S_trunc);
+ static const openmode __noreplace = _S_noreplace;
+
+#ifdef __glibcxx_ios_noreplace // C++ >= 23 && HOSTED
+ /// Open a file in exclusive mode.
+ static const openmode noreplace = _S_noreplace;
+#endif
// 27.4.2.1.5 Type ios_base::seekdir
/**
* @brief This is an enumerated type.
*
- * @c "_Ios_Seekdir" is implementation-defined. Defined values
+ * @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.
typedef _Ios_Seekdir seekdir;
/// Request a seek relative to the beginning of the stream.
- static const seekdir beg = seekdir(0);
+ static const seekdir beg = _S_beg;
/// Request a seek relative to the current position within the sequence.
- static const seekdir cur = seekdir(SEEK_CUR);
+ static const seekdir cur = _S_cur;
/// Request a seek relative to the current end of the sequence.
- static const seekdir end = seekdir(SEEK_END);
-
-#ifdef _GLIBCXX_DEPRECATED
- // Annex D.6
- typedef int io_state;
- typedef int open_mode;
- typedef int seek_dir;
-
- typedef std::streampos streampos;
- typedef std::streamoff streamoff;
+ static const seekdir end = _S_end;
+
+#if __cplusplus <= 201402L
+ // Annex D.6 (removed in C++17)
+ typedef int io_state
+ _GLIBCXX_DEPRECATED_SUGGEST("std::iostate");
+ typedef int open_mode
+ _GLIBCXX_DEPRECATED_SUGGEST("std::openmode");
+ typedef int seek_dir
+ _GLIBCXX_DEPRECATED_SUGGEST("std::seekdir");
+
+ typedef std::streampos streampos
+ _GLIBCXX_DEPRECATED_SUGGEST("std::streampos");
+ typedef std::streamoff streamoff
+ _GLIBCXX_DEPRECATED_SUGGEST("std::streamoff");
#endif
// Callbacks;
/**
* @brief The type of an event callback function.
- * @param event One of the members of the event enum.
- * @param ios_base Reference to the ios_base object.
- * @param int The integer provided when the callback was registered.
+ * @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, ios_base&, int);
+ typedef void (*event_callback) (event __e, ios_base& __b, int __i);
/**
* @brief Add the callback __fn with parameter __index.
* function are allowed. If there are multiple callbacks, they are
* invoked in the order they were registered.
*/
- void
+ void
register_callback(event_callback __fn, int __index);
protected:
- //@{
- /**
- * @if maint
- * ios_base data members (doc me)
- * @endif
- */
- streamsize _M_precision;
- streamsize _M_width;
- fmtflags _M_flags;
- iostate _M_exception;
- iostate _M_streambuf_state;
- //@}
+ 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;
+ _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(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); }
+
+ void
+ _M_add_reference() { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); }
// 0 => OK to delete.
- int
- _M_remove_reference() { return __exchange_and_add(&_M_refcount, -1); }
+ 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;
+ _Callback_list* _M_callbacks;
- void
+ void
_M_call_callbacks(event __ev) throw();
- void
- _M_dispose_callbacks(void);
+ void
+ _M_dispose_callbacks(void) throw();
// 27.4.2.5 Members for iword/pword storage
- struct _Words
- {
- void* _M_pword;
- long _M_iword;
+ 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;
+ _Words _M_word_zero;
// Guaranteed storage.
// The first 5 iword and pword slots are reserved for internal use.
- static const int _S_local_word_size = 8;
- _Words _M_local_word[_S_local_word_size];
+ 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);
+ 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;
+ locale _M_ios_locale;
- void
- _M_init();
+ 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
+ // through these machinations.
+ class Init
{
friend class ios_base;
public:
Init();
~Init();
-
- // NB: Allows debugger applications use of the standard streams
- // from operator new. _S_ios_base_init must be incremented in
- // _S_ios_create _after_ initialization is completed.
- static bool
- _S_initialized() { return _S_ios_base_init; }
+
+#if __cplusplus >= 201103L
+ Init(const Init&) = default;
+ Init& operator=(const Init&) = default;
+#endif
private:
- static int _S_ios_base_init;
- static bool _S_synced_with_stdio;
+ 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.
*/
- inline fmtflags
- flags() const { return _M_flags; }
+ fmtflags
+ flags() const
+ { return _M_flags; }
/**
* @brief Setting new format flags all at once.
- * @param fmtfl The new flags to set.
+ * @param __fmtfl The new flags to set.
* @return The previous format control flags.
*
- * This function overwrites all the format flags with @a fmtfl.
+ * This function overwrites all the format flags with @a __fmtfl.
*/
- inline fmtflags
+ fmtflags
flags(fmtflags __fmtfl)
- {
- fmtflags __old = _M_flags;
- _M_flags = __fmtfl;
- return __old;
+ {
+ fmtflags __old = _M_flags;
+ _M_flags = __fmtfl;
+ return __old;
}
/**
* @brief Setting new format flags.
- * @param fmtfl Additional flags to set.
+ * @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.
*/
- inline fmtflags
+ fmtflags
setf(fmtflags __fmtfl)
- {
- fmtflags __old = _M_flags;
- _M_flags |= __fmtfl;
- return __old;
+ {
+ 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.
+ * @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.
*/
- inline fmtflags
+ fmtflags
setf(fmtflags __fmtfl, fmtflags __mask)
{
fmtflags __old = _M_flags;
/**
* @brief Clearing format flags.
- * @param mask The flags to unset.
+ * @param __mask The flags to unset.
*
- * This function clears @a mask in the format flags.
+ * This function clears @a __mask in the format flags.
*/
- inline void
- unsetf(fmtflags __mask) { _M_flags &= ~__mask; }
+ void
+ unsetf(fmtflags __mask)
+ { _M_flags &= ~__mask; }
/**
* @brief Flags access.
* @return The precision to generate on certain output operations.
*
- * @if maint
- * Be careful if you try to give a definition of "precision" here; see
+ * Be careful if you try to give a definition of @a precision here; see
* DR 189.
- * @endif
*/
- inline streamsize
- precision() const { return _M_precision; }
+ streamsize
+ precision() const
+ { return _M_precision; }
/**
* @brief Changing flags.
- * @param prec The new precision value.
+ * @param __prec The new precision value.
* @return The previous value of precision().
*/
- inline streamsize
+ streamsize
precision(streamsize __prec)
- {
- streamsize __old = _M_precision;
- _M_precision = __prec;
- return __old;
+ {
+ streamsize __old = _M_precision;
+ _M_precision = __prec;
+ return __old;
}
/**
* @brief Flags access.
* @return The minimum field width to generate on output operations.
*
- * "Minimum field width" refers to the number of characters.
+ * <em>Minimum field width</em> refers to the number of characters.
*/
- inline streamsize
- width() const { return _M_width; }
+ streamsize
+ width() const
+ { return _M_width; }
/**
* @brief Changing flags.
- * @param wide The new width value.
+ * @param __wide The new width value.
* @return The previous value of width().
*/
- inline streamsize
+ streamsize
width(streamsize __wide)
- {
- streamsize __old = _M_width;
- _M_width = __wide;
- return __old;
+ {
+ 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.
+ * @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
- * http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#8 for more.
+ * https://gcc.gnu.org/onlinedocs/libstdc++/manual/fstreams.html#std.io.filestreams.binary
*/
- static bool
+ 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.
+ * @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);
+ locale
+ imbue(const locale& __loc) throw();
/**
* @brief Locale access
* returns @c loc. Otherwise, it returns a copy of @c std::locale(),
* the global C++ locale.
*/
- inline locale
- getloc() const { return _M_ios_locale; }
+ locale
+ getloc() const
+ { return _M_ios_locale; }
/**
* @brief Locale access
* Like getloc above, but returns a reference instead of
* generating a copy.
*/
- inline const locale&
- _M_getloc() const { return _M_ios_locale; }
+ const locale&
+ _M_getloc() const
+ { return _M_ios_locale; }
// [27.4.2.5] ios_base storage functions
/**
* returned on each invocation. xalloc is guaranteed to return an index
* that is safe to use in the iword and pword arrays.
*/
- static int
+ static int
xalloc() throw();
/**
* 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.
*/
- inline long&
+ long&
iword(int __ix)
{
- _Words& __word = (__ix < _M_word_size)
- ? _M_word[__ix] : _M_grow_words(__ix);
+ _Words& __word = ((unsigned)__ix < (unsigned)_M_word_size)
+ ? _M_word[__ix] : _M_grow_words(__ix, true);
return __word._M_iword;
}
* 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.
*/
- inline void*&
+ void*&
pword(int __ix)
{
- _Words& __word = (__ix < _M_word_size)
- ? _M_word[__ix] : _M_grow_words(__ix);
+ _Words& __word = ((unsigned)__ix < (unsigned)_M_word_size)
+ ? _M_word[__ix] : _M_grow_words(__ix, false);
return __word._M_pword;
}
virtual ~ios_base();
protected:
- ios_base();
+ ios_base() throw ();
-#ifdef _GLIBCXX_RESOLVE_LIB_DEFECTS
- //50. Copy constructor and assignment operator of ios_base
+#if __cplusplus < 201103L
+ // _GLIBCXX_RESOLVE_LIB_DEFECTS
+ // 50. Copy constructor and assignment operator of ios_base
private:
ios_base(const ios_base&);
- ios_base&
+ ios_base&
operator=(const ios_base&);
+#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
};
-
+
// [27.4.5.1] fmtflags manipulators
/// Calls base.setf(ios_base::boolalpha).
- inline ios_base&
+ inline ios_base&
boolalpha(ios_base& __base)
{
__base.setf(ios_base::boolalpha);
}
/// Calls base.unsetf(ios_base::boolalpha).
- inline ios_base&
+ inline ios_base&
noboolalpha(ios_base& __base)
{
__base.unsetf(ios_base::boolalpha);
}
/// Calls base.setf(ios_base::showbase).
- inline ios_base&
+ inline ios_base&
showbase(ios_base& __base)
{
__base.setf(ios_base::showbase);
}
/// Calls base.unsetf(ios_base::showbase).
- inline ios_base&
+ inline ios_base&
noshowbase(ios_base& __base)
{
__base.unsetf(ios_base::showbase);
}
/// Calls base.setf(ios_base::showpoint).
- inline ios_base&
+ inline ios_base&
showpoint(ios_base& __base)
{
__base.setf(ios_base::showpoint);
}
/// Calls base.unsetf(ios_base::showpoint).
- inline ios_base&
+ inline ios_base&
noshowpoint(ios_base& __base)
{
__base.unsetf(ios_base::showpoint);
}
/// Calls base.setf(ios_base::showpos).
- inline ios_base&
+ inline ios_base&
showpos(ios_base& __base)
{
__base.setf(ios_base::showpos);
}
/// Calls base.unsetf(ios_base::showpos).
- inline ios_base&
+ inline ios_base&
noshowpos(ios_base& __base)
{
__base.unsetf(ios_base::showpos);
}
/// Calls base.setf(ios_base::skipws).
- inline ios_base&
+ inline ios_base&
skipws(ios_base& __base)
{
__base.setf(ios_base::skipws);
return __base;
}
-
+
/// Calls base.unsetf(ios_base::skipws).
- inline ios_base&
+ inline ios_base&
noskipws(ios_base& __base)
{
__base.unsetf(ios_base::skipws);
}
/// Calls base.setf(ios_base::uppercase).
- inline ios_base&
+ inline ios_base&
uppercase(ios_base& __base)
{
__base.setf(ios_base::uppercase);
}
/// Calls base.unsetf(ios_base::uppercase).
- inline ios_base&
+ inline ios_base&
nouppercase(ios_base& __base)
{
__base.unsetf(ios_base::uppercase);
}
/// Calls base.setf(ios_base::unitbuf).
- inline ios_base&
+ inline ios_base&
unitbuf(ios_base& __base)
{
- __base.setf(ios_base::unitbuf);
+ __base.setf(ios_base::unitbuf);
return __base;
}
/// Calls base.unsetf(ios_base::unitbuf).
- inline ios_base&
+ inline ios_base&
nounitbuf(ios_base& __base)
{
__base.unsetf(ios_base::unitbuf);
- return __base;
+ return __base;
}
- // [27.4.5.2] adjustfield anipulators
+ // [27.4.5.2] adjustfield manipulators
/// Calls base.setf(ios_base::internal, ios_base::adjustfield).
- inline ios_base&
+ inline ios_base&
internal(ios_base& __base)
{
__base.setf(ios_base::internal, ios_base::adjustfield);
- return __base;
+ return __base;
}
/// Calls base.setf(ios_base::left, ios_base::adjustfield).
- inline ios_base&
+ 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&
+ inline ios_base&
right(ios_base& __base)
{
__base.setf(ios_base::right, ios_base::adjustfield);
return __base;
}
-
- // [27.4.5.3] basefield anipulators
+
+ // [27.4.5.3] basefield manipulators
/// Calls base.setf(ios_base::dec, ios_base::basefield).
- inline ios_base&
+ 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&
+ inline ios_base&
hex(ios_base& __base)
{
__base.setf(ios_base::hex, ios_base::basefield);
}
/// Calls base.setf(ios_base::oct, ios_base::basefield).
- inline ios_base&
+ inline ios_base&
oct(ios_base& __base)
{
__base.setf(ios_base::oct, ios_base::basefield);
return __base;
}
-
- // [27.4.5.4] floatfield anipulators
+
+ // [27.4.5.4] floatfield manipulators
/// Calls base.setf(ios_base::fixed, ios_base::floatfield).
- inline ios_base&
+ inline ios_base&
fixed(ios_base& __base)
{
__base.setf(ios_base::fixed, ios_base::floatfield);
}
/// Calls base.setf(ios_base::scientific, ios_base::floatfield).
- inline ios_base&
+ inline ios_base&
scientific(ios_base& __base)
{
__base.setf(ios_base::scientific, ios_base::floatfield);
return __base;
}
-} // namespace std
-#endif /* _IOS_BASE_H */
+#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
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
+
+#endif /* _IOS_BASE_H */
projects / thirdparty / gcc.git / blobdiff