LCOV - app.info - /tools/gcc-4.5/include/c++/4.5.2/bits/ios_base.h

LCOV - code coverage report
| Current view: | directory - tools/gcc-4.5/include/c++/4.5.2/bits - ios_base.h (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 18 | 4 | 22.2 %
| Date: | 2012-04-07 | Functions: | 8 | 2 | 25.0 %

           1                 : // Iostreams base classes -*- C++ -*-
           2                 :
           3                 : // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
           4                 : // 2006, 2007, 2008, 2009, 2010
           5                 : // Free Software Foundation, Inc.
           6                 : //
           7                 : // This file is part of the GNU ISO C++ Library.  This library is free
           8                 : // software; you can redistribute it and/or modify it under the
           9                 : // terms of the GNU General Public License as published by the
          10                 : // Free Software Foundation; either version 3, or (at your option)
          11                 : // any later version.
          12                 :
          13                 : // This library is distributed in the hope that it will be useful,
          14                 : // but WITHOUT ANY WARRANTY; without even the implied warranty of
          15                 : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
          16                 : // GNU General Public License for more details.
          17                 :
          18                 : // Under Section 7 of GPL version 3, you are granted additional
          19                 : // permissions described in the GCC Runtime Library Exception, version
          20                 : // 3.1, as published by the Free Software Foundation.
          21                 :
          22                 : // You should have received a copy of the GNU General Public License and
          23                 : // a copy of the GCC Runtime Library Exception along with this program;
          24                 : // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
          25                 : // <http://www.gnu.org/licenses/>.
          26                 :
          27                 : /** @file ios_base.h
          28                 :  *  This is an internal header file, included by other library headers.
          29                 :  *  You should not attempt to use it directly.
          30                 :  */
          31                 :
          32                 : //
          33                 : // ISO C++ 14882: 27.4  Iostreams base classes
          34                 : //
          35                 :
          36                 : #ifndef _IOS_BASE_H
          37                 : #define _IOS_BASE_H 1
          38                 :
          39                 : #pragma GCC system_header
          40                 :
          41                 : #include <ext/atomicity.h>
          42                 : #include <bits/localefwd.h>
          43                 : #include <bits/locale_classes.h>
          44                 :
          45                 : #ifndef _GLIBCXX_STDIO_MACROS
          46                 : # include <cstdio>   // For SEEK_CUR, SEEK_END
          47                 : # define _IOS_BASE_SEEK_CUR SEEK_CUR
          48                 : # define _IOS_BASE_SEEK_END SEEK_END
          49                 : #else
          50                 : # define _IOS_BASE_SEEK_CUR 1
          51                 : # define _IOS_BASE_SEEK_END 2
          52                 : #endif
          53                 :
          54                 : _GLIBCXX_BEGIN_NAMESPACE(std)
          55                 :
          56                 :   // The following definitions of bitmask types are enums, not ints,
          57                 :   // as permitted (but not required) in the standard, in order to provide
          58                 :   // better type safety in iostream calls.  A side effect is that
          59                 :   // expressions involving them are no longer compile-time constants.
          60                 :   enum _Ios_Fmtflags
          61                 :     {
          62                 :       _S_boolalpha      = 1L << 0,
          63                 :       _S_dec            = 1L << 1,
          64                 :       _S_fixed          = 1L << 2,
          65                 :       _S_hex            = 1L << 3,
          66                 :       _S_internal       = 1L << 4,
          67                 :       _S_left           = 1L << 5,
          68                 :       _S_oct            = 1L << 6,
          69                 :       _S_right          = 1L << 7,
          70                 :       _S_scientific     = 1L << 8,
          71                 :       _S_showbase       = 1L << 9,
          72                 :       _S_showpoint      = 1L << 10,
          73                 :       _S_showpos        = 1L << 11,
          74                 :       _S_skipws         = 1L << 12,
          75                 :       _S_unitbuf        = 1L << 13,
          76                 :       _S_uppercase      = 1L << 14,
          77                 :       _S_adjustfield    = _S_left | _S_right | _S_internal,
          78                 :       _S_basefield      = _S_dec | _S_oct | _S_hex,
          79                 :       _S_floatfield     = _S_scientific | _S_fixed,
          80                 :       _S_ios_fmtflags_end = 1L << 16
          81                 :     };
          82                 :
          83                 :   inline _Ios_Fmtflags
          84               0 :   operator&(_Ios_Fmtflags __a, _Ios_Fmtflags __b)
          85               0 :   { return _Ios_Fmtflags(static_cast<int>(__a) & static_cast<int>(__b)); }
          86                 :
          87                 :   inline _Ios_Fmtflags
          88                 :   operator|(_Ios_Fmtflags __a, _Ios_Fmtflags __b)
          89                 :   { return _Ios_Fmtflags(static_cast<int>(__a) | static_cast<int>(__b)); }
          90                 :
          91                 :   inline _Ios_Fmtflags
          92                 :   operator^(_Ios_Fmtflags __a, _Ios_Fmtflags __b)
          93                 :   { return _Ios_Fmtflags(static_cast<int>(__a) ^ static_cast<int>(__b)); }
          94                 :
          95                 :   inline _Ios_Fmtflags&
          96                 :   operator|=(_Ios_Fmtflags& __a, _Ios_Fmtflags __b)
          97                 :   { return __a = __a | __b; }
          98                 :
          99                 :   inline _Ios_Fmtflags&
         100                 :   operator&=(_Ios_Fmtflags& __a, _Ios_Fmtflags __b)
         101                 :   { return __a = __a & __b; }
         102                 :
         103                 :   inline _Ios_Fmtflags&
         104                 :   operator^=(_Ios_Fmtflags& __a, _Ios_Fmtflags __b)
         105                 :   { return __a = __a ^ __b; }
         106                 :
         107                 :   inline _Ios_Fmtflags
         108                 :   operator~(_Ios_Fmtflags __a)
         109                 :   { return _Ios_Fmtflags(~static_cast<int>(__a)); }
         110                 :
         111                 :
         112                 :   enum _Ios_Openmode
         113                 :     {
         114                 :       _S_app            = 1L << 0,
         115                 :       _S_ate            = 1L << 1,
         116                 :       _S_bin            = 1L << 2,
         117                 :       _S_in             = 1L << 3,
         118                 :       _S_out            = 1L << 4,
         119                 :       _S_trunc          = 1L << 5,
         120                 :       _S_ios_openmode_end = 1L << 16
         121                 :     };
         122                 :
         123                 :   inline _Ios_Openmode
         124                 :   operator&(_Ios_Openmode __a, _Ios_Openmode __b)
         125                 :   { return _Ios_Openmode(static_cast<int>(__a) & static_cast<int>(__b)); }
         126                 :
         127                 :   inline _Ios_Openmode
         128              50 :   operator|(_Ios_Openmode __a, _Ios_Openmode __b)
         129              50 :   { return _Ios_Openmode(static_cast<int>(__a) | static_cast<int>(__b)); }
         130                 :
         131                 :   inline _Ios_Openmode
         132                 :   operator^(_Ios_Openmode __a, _Ios_Openmode __b)
         133                 :   { return _Ios_Openmode(static_cast<int>(__a) ^ static_cast<int>(__b)); }
         134                 :
         135                 :   inline _Ios_Openmode&
         136                 :   operator|=(_Ios_Openmode& __a, _Ios_Openmode __b)
         137                 :   { return __a = __a | __b; }
         138                 :
         139                 :   inline _Ios_Openmode&
         140                 :   operator&=(_Ios_Openmode& __a, _Ios_Openmode __b)
         141                 :   { return __a = __a & __b; }
         142                 :
         143                 :   inline _Ios_Openmode&
         144                 :   operator^=(_Ios_Openmode& __a, _Ios_Openmode __b)
         145                 :   { return __a = __a ^ __b; }
         146                 :
         147                 :   inline _Ios_Openmode
         148                 :   operator~(_Ios_Openmode __a)
         149                 :   { return _Ios_Openmode(~static_cast<int>(__a)); }
         150                 :
         151                 :
         152                 :   enum _Ios_Iostate
         153                 :     {
         154                 :       _S_goodbit                = 0,
         155                 :       _S_badbit                 = 1L << 0,
         156                 :       _S_eofbit                 = 1L << 1,
         157                 :       _S_failbit                = 1L << 2,
         158                 :       _S_ios_iostate_end = 1L << 16
         159                 :     };
         160                 :
         161                 :   inline _Ios_Iostate
         162               0 :   operator&(_Ios_Iostate __a, _Ios_Iostate __b)
         163               0 :   { return _Ios_Iostate(static_cast<int>(__a) & static_cast<int>(__b)); }
         164                 :
         165                 :   inline _Ios_Iostate
         166              84 :   operator|(_Ios_Iostate __a, _Ios_Iostate __b)
         167              84 :   { return _Ios_Iostate(static_cast<int>(__a) | static_cast<int>(__b)); }
         168                 :
         169                 :   inline _Ios_Iostate
         170                 :   operator^(_Ios_Iostate __a, _Ios_Iostate __b)
         171                 :   { return _Ios_Iostate(static_cast<int>(__a) ^ static_cast<int>(__b)); }
         172                 :
         173                 :   inline _Ios_Iostate&
         174               0 :   operator|=(_Ios_Iostate& __a, _Ios_Iostate __b)
         175               0 :   { return __a = __a | __b; }
         176                 :
         177                 :   inline _Ios_Iostate&
         178                 :   operator&=(_Ios_Iostate& __a, _Ios_Iostate __b)
         179                 :   { return __a = __a & __b; }
         180                 :
         181                 :   inline _Ios_Iostate&
         182                 :   operator^=(_Ios_Iostate& __a, _Ios_Iostate __b)
         183                 :   { return __a = __a ^ __b; }
         184                 :
         185                 :   inline _Ios_Iostate
         186                 :   operator~(_Ios_Iostate __a)
         187                 :   { return _Ios_Iostate(~static_cast<int>(__a)); }
         188                 :
         189                 :   enum _Ios_Seekdir
         190                 :     {
         191                 :       _S_beg = 0,
         192                 :       _S_cur = _IOS_BASE_SEEK_CUR,
         193                 :       _S_end = _IOS_BASE_SEEK_END,
         194                 :       _S_ios_seekdir_end = 1L << 16
         195                 :     };
         196                 :
         197                 :   // 27.4.2  Class ios_base
         198                 :   /**
         199                 :    *  @brief  The base of the I/O class hierarchy.
         200                 :    *  @ingroup io
         201                 :    *
         202                 :    *  This class defines everything that can be defined about I/O that does
         203                 :    *  not depend on the type of characters being input or output.  Most
         204                 :    *  people will only see @c ios_base when they need to specify the full
         205                 :    *  name of the various I/O flags (e.g., the openmodes).
         206                 :   */
         207                 :   class ios_base
         208                 :   {
         209                 :   public:
         210                 :
         211                 :     /**
         212                 :      *  @brief These are thrown to indicate problems with io.
         213                 :      *  @ingroup exceptions
         214                 :      *
         215                 :      *  27.4.2.1.1  Class ios_base::failure
         216                 :      */
         217                 :     class failure : public exception
         218                 :     {
         219                 :     public:
         220                 :       // _GLIBCXX_RESOLVE_LIB_DEFECTS
         221                 :       // 48.  Use of non-existent exception constructor
         222                 :       explicit
         223                 :       failure(const string& __str) throw();
         224                 :
         225                 :       // This declaration is not useless:
         226                 :       // http://gcc.gnu.org/onlinedocs/gcc-4.3.2/gcc/Vague-Linkage.html
         227                 :       virtual
         228                 :       ~failure() throw();
         229                 :
         230                 :       virtual const char*
         231                 :       what() const throw();
         232                 :
         233                 :     private:
         234                 :       string _M_msg;
         235                 :     };
         236                 :
         237                 :     // 27.4.2.1.2  Type ios_base::fmtflags
         238                 :     /**
         239                 :      *  @brief This is a bitmask type.
         240                 :      *
         241                 :      *  @c @a _Ios_Fmtflags is implementation-defined, but it is valid to
         242                 :      *  perform bitwise operations on these values and expect the Right
         243                 :      *  Thing to happen.  Defined objects of type fmtflags are:
         244                 :      *  - boolalpha
         245                 :      *  - dec
         246                 :      *  - fixed
         247                 :      *  - hex
         248                 :      *  - internal
         249                 :      *  - left
         250                 :      *  - oct
         251                 :      *  - right
         252                 :      *  - scientific
         253                 :      *  - showbase
         254                 :      *  - showpoint
         255                 :      *  - showpos
         256                 :      *  - skipws
         257                 :      *  - unitbuf
         258                 :      *  - uppercase
         259                 :      *  - adjustfield
         260                 :      *  - basefield
         261                 :      *  - floatfield
         262                 :     */
         263                 :     typedef _Ios_Fmtflags fmtflags;
         264                 :
         265                 :     /// Insert/extract @c bool in alphabetic rather than numeric format.
         266                 :     static const fmtflags boolalpha =   _S_boolalpha;
         267                 :
         268                 :     /// Converts integer input or generates integer output in decimal base.
         269                 :     static const fmtflags dec =         _S_dec;
         270                 :
         271                 :     /// Generate floating-point output in fixed-point notation.
         272                 :     static const fmtflags fixed =       _S_fixed;
         273                 :
         274                 :     /// Converts integer input or generates integer output in hexadecimal base.
         275                 :     static const fmtflags hex =         _S_hex;
         276                 :
         277                 :     /// Adds fill characters at a designated internal point in certain
         278                 :     /// generated output, or identical to @c right if no such point is
         279                 :     /// designated.
         280                 :     static const fmtflags internal =    _S_internal;
         281                 :
         282                 :     /// Adds fill characters on the right (final positions) of certain
         283                 :     /// generated output.  (I.e., the thing you print is flush left.)
         284                 :     static const fmtflags left =        _S_left;
         285                 :
         286                 :     /// Converts integer input or generates integer output in octal base.
         287                 :     static const fmtflags oct =         _S_oct;
         288                 :
         289                 :     /// Adds fill characters on the left (initial positions) of certain
         290                 :     /// generated output.  (I.e., the thing you print is flush right.)
         291                 :     static const fmtflags right =       _S_right;
         292                 :
         293                 :     /// Generates floating-point output in scientific notation.
         294                 :     static const fmtflags scientific =  _S_scientific;
         295                 :
         296                 :     /// Generates a prefix indicating the numeric base of generated integer
         297                 :     /// output.
         298                 :     static const fmtflags showbase =    _S_showbase;
         299                 :
         300                 :     /// Generates a decimal-point character unconditionally in generated
         301                 :     /// floating-point output.
         302                 :     static const fmtflags showpoint =   _S_showpoint;
         303                 :
         304                 :     /// Generates a + sign in non-negative generated numeric output.
         305                 :     static const fmtflags showpos =     _S_showpos;
         306                 :
         307                 :     /// Skips leading white space before certain input operations.
         308                 :     static const fmtflags skipws =      _S_skipws;
         309                 :
         310                 :     /// Flushes output after each output operation.
         311                 :     static const fmtflags unitbuf =     _S_unitbuf;
         312                 :
         313                 :     /// Replaces certain lowercase letters with their uppercase equivalents
         314                 :     /// in generated output.
         315                 :     static const fmtflags uppercase =   _S_uppercase;
         316                 :
         317                 :     /// A mask of left|right|internal.  Useful for the 2-arg form of @c setf.
         318                 :     static const fmtflags adjustfield = _S_adjustfield;
         319                 :
         320                 :     /// A mask of dec|oct|hex.  Useful for the 2-arg form of @c setf.
         321                 :     static const fmtflags basefield =   _S_basefield;
         322                 :
         323                 :     /// A mask of scientific|fixed.  Useful for the 2-arg form of @c setf.
         324                 :     static const fmtflags floatfield =  _S_floatfield;
         325                 :
         326                 :     // 27.4.2.1.3  Type ios_base::iostate
         327                 :     /**
         328                 :      *  @brief This is a bitmask type.
         329                 :      *
         330                 :      *  @c @a _Ios_Iostate is implementation-defined, but it is valid to
         331                 :      *  perform bitwise operations on these values and expect the Right
         332                 :      *  Thing to happen.  Defined objects of type iostate are:
         333                 :      *  - badbit
         334                 :      *  - eofbit
         335                 :      *  - failbit
         336                 :      *  - goodbit
         337                 :     */
         338                 :     typedef _Ios_Iostate iostate;
         339                 :
         340                 :     /// Indicates a loss of integrity in an input or output sequence (such
         341                 :     /// as an irrecoverable read error from a file).
         342                 :     static const iostate badbit =       _S_badbit;
         343                 :
         344                 :     /// Indicates that an input operation reached the end of an input sequence.
         345                 :     static const iostate eofbit =       _S_eofbit;
         346                 :
         347                 :     /// Indicates that an input operation failed to read the expected
         348                 :     /// characters, or that an output operation failed to generate the
         349                 :     /// desired characters.
         350                 :     static const iostate failbit =      _S_failbit;
         351                 :
         352                 :     /// Indicates all is well.
         353                 :     static const iostate goodbit =      _S_goodbit;
         354                 :
         355                 :     // 27.4.2.1.4  Type ios_base::openmode
         356                 :     /**
         357                 :      *  @brief This is a bitmask type.
         358                 :      *
         359                 :      *  @c @a _Ios_Openmode is implementation-defined, but it is valid to
         360                 :      *  perform bitwise operations on these values and expect the Right
         361                 :      *  Thing to happen.  Defined objects of type openmode are:
         362                 :      *  - app
         363                 :      *  - ate
         364                 :      *  - binary
         365                 :      *  - in
         366                 :      *  - out
         367                 :      *  - trunc
         368                 :     */
         369                 :     typedef _Ios_Openmode openmode;
         370                 :
         371                 :     /// Seek to end before each write.
         372                 :     static const openmode app =         _S_app;
         373                 :
         374                 :     /// Open and seek to end immediately after opening.
         375                 :     static const openmode ate =         _S_ate;
         376                 :
         377                 :     /// Perform input and output in binary mode (as opposed to text mode).
         378                 :     /// This is probably not what you think it is; see
         379                 :     /// http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch27s02.html
         380                 :     static const openmode binary =      _S_bin;
         381                 :
         382                 :     /// Open for input.  Default for @c ifstream and fstream.
         383                 :     static const openmode in =          _S_in;
         384                 :
         385                 :     /// Open for output.  Default for @c ofstream and fstream.
         386                 :     static const openmode out =         _S_out;
         387                 :
         388                 :     /// Open for input.  Default for @c ofstream.
         389                 :     static const openmode trunc =       _S_trunc;
         390                 :
         391                 :     // 27.4.2.1.5  Type ios_base::seekdir
         392                 :     /**
         393                 :      *  @brief This is an enumerated type.
         394                 :      *
         395                 :      *  @c @a _Ios_Seekdir is implementation-defined.  Defined values
         396                 :      *  of type seekdir are:
         397                 :      *  - beg
         398                 :      *  - cur, equivalent to @c SEEK_CUR in the C standard library.
         399                 :      *  - end, equivalent to @c SEEK_END in the C standard library.
         400                 :     */
         401                 :     typedef _Ios_Seekdir seekdir;
         402                 :
         403                 :     /// Request a seek relative to the beginning of the stream.
         404                 :     static const seekdir beg =          _S_beg;
         405                 :
         406                 :     /// Request a seek relative to the current position within the sequence.
         407                 :     static const seekdir cur =          _S_cur;
         408                 :
         409                 :     /// Request a seek relative to the current end of the sequence.
         410                 :     static const seekdir end =          _S_end;
         411                 :
         412                 :     // Annex D.6
         413                 :     typedef int io_state;
         414                 :     typedef int open_mode;
         415                 :     typedef int seek_dir;
         416                 :
         417                 :     typedef std::streampos streampos;
         418                 :     typedef std::streamoff streamoff;
         419                 :
         420                 :     // Callbacks;
         421                 :     /**
         422                 :      *  @brief  The set of events that may be passed to an event callback.
         423                 :      *
         424                 :      *  erase_event is used during ~ios() and copyfmt().  imbue_event is used
         425                 :      *  during imbue().  copyfmt_event is used during copyfmt().
         426                 :     */
         427                 :     enum event
         428                 :     {
         429                 :       erase_event,
         430                 :       imbue_event,
         431                 :       copyfmt_event
         432                 :     };
         433                 :
         434                 :     /**
         435                 :      *  @brief  The type of an event callback function.
         436                 :      *  @param  event  One of the members of the event enum.
         437                 :      *  @param  ios_base  Reference to the ios_base object.
         438                 :      *  @param  int  The integer provided when the callback was registered.
         439                 :      *
         440                 :      *  Event callbacks are user defined functions that get called during
         441                 :      *  several ios_base and basic_ios functions, specifically imbue(),
         442                 :      *  copyfmt(), and ~ios().
         443                 :     */
         444                 :     typedef void (*event_callback) (event, ios_base&, int);
         445                 :
         446                 :     /**
         447                 :      *  @brief  Add the callback __fn with parameter __index.
         448                 :      *  @param  __fn  The function to add.
         449                 :      *  @param  __index  The integer to pass to the function when invoked.
         450                 :      *
         451                 :      *  Registers a function as an event callback with an integer parameter to
         452                 :      *  be passed to the function when invoked.  Multiple copies of the
         453                 :      *  function are allowed.  If there are multiple callbacks, they are
         454                 :      *  invoked in the order they were registered.
         455                 :     */
         456                 :     void
         457                 :     register_callback(event_callback __fn, int __index);
         458                 :
         459                 :   protected:
         460                 :     streamsize          _M_precision;
         461                 :     streamsize          _M_width;
         462                 :     fmtflags            _M_flags;
         463                 :     iostate             _M_exception;
         464                 :     iostate             _M_streambuf_state;
         465                 :
         466                 :     // 27.4.2.6  Members for callbacks
         467                 :     // 27.4.2.6  ios_base callbacks
         468                 :     struct _Callback_list
         469                 :     {
         470                 :       // Data Members
         471                 :       _Callback_list*           _M_next;
         472                 :       ios_base::event_callback  _M_fn;
         473                 :       int                       _M_index;
         474                 :       _Atomic_word              _M_refcount;  // 0 means one reference.
         475                 :
         476                 :       _Callback_list(ios_base::event_callback __fn, int __index,
         477                 :                      _Callback_list* __cb)
         478                 :       : _M_next(__cb), _M_fn(__fn), _M_index(__index), _M_refcount(0) { }
         479                 :
         480                 :       void
         481                 :       _M_add_reference() { __gnu_cxx::__atomic_add_dispatch(&_M_refcount, 1); }
         482                 :
         483                 :       // 0 => OK to delete.
         484                 :       int
         485                 :       _M_remove_reference()
         486                 :       { return __gnu_cxx::__exchange_and_add_dispatch(&_M_refcount, -1); }
         487                 :     };
         488                 :
         489                 :      _Callback_list*    _M_callbacks;
         490                 :
         491                 :     void
         492                 :     _M_call_callbacks(event __ev) throw();
         493                 :
         494                 :     void
         495                 :     _M_dispose_callbacks(void) throw();
         496                 :
         497                 :     // 27.4.2.5  Members for iword/pword storage
         498                 :     struct _Words
         499                 :     {
         500                 :       void*     _M_pword;
         501                 :       long      _M_iword;
         502                 :       _Words() : _M_pword(0), _M_iword(0) { }
         503                 :     };
         504                 :
         505                 :     // Only for failed iword/pword calls.
         506                 :     _Words              _M_word_zero;
         507                 :
         508                 :     // Guaranteed storage.
         509                 :     // The first 5 iword and pword slots are reserved for internal use.
         510                 :     enum { _S_local_word_size = 8 };
         511                 :     _Words              _M_local_word[_S_local_word_size];
         512                 :
         513                 :     // Allocated storage.
         514                 :     int                 _M_word_size;
         515                 :     _Words*             _M_word;
         516                 :
         517                 :     _Words&
         518                 :     _M_grow_words(int __index, bool __iword);
         519                 :
         520                 :     // Members for locale and locale caching.
         521                 :     locale              _M_ios_locale;
         522                 :
         523                 :     void
         524                 :     _M_init() throw();
         525                 :
         526                 :   public:
         527                 :
         528                 :     // 27.4.2.1.6  Class ios_base::Init
         529                 :     // Used to initialize standard streams. In theory, g++ could use
         530                 :     // -finit-priority to order this stuff correctly without going
         531                 :     // through these machinations.
         532                 :     class Init
         533                 :     {
         534                 :       friend class ios_base;
         535                 :     public:
         536                 :       Init();
         537                 :       ~Init();
         538                 :
         539                 :     private:
         540                 :       static _Atomic_word       _S_refcount;
         541                 :       static bool               _S_synced_with_stdio;
         542                 :     };
         543                 :
         544                 :     // [27.4.2.2] fmtflags state functions
         545                 :     /**
         546                 :      *  @brief  Access to format flags.
         547                 :      *  @return  The format control flags for both input and output.
         548                 :     */
         549                 :     fmtflags
         550               0 :     flags() const
         551               0 :     { return _M_flags; }
         552                 :
         553                 :     /**
         554                 :      *  @brief  Setting new format flags all at once.
         555                 :      *  @param  fmtfl  The new flags to set.
         556                 :      *  @return  The previous format control flags.
         557                 :      *
         558                 :      *  This function overwrites all the format flags with @a fmtfl.
         559                 :     */
         560                 :     fmtflags
         561                 :     flags(fmtflags __fmtfl)
         562                 :     {
         563                 :       fmtflags __old = _M_flags;
         564                 :       _M_flags = __fmtfl;
         565                 :       return __old;
         566                 :     }
         567                 :
         568                 :     /**
         569                 :      *  @brief  Setting new format flags.
         570                 :      *  @param  fmtfl  Additional flags to set.
         571                 :      *  @return  The previous format control flags.
         572                 :      *
         573                 :      *  This function sets additional flags in format control.  Flags that
         574                 :      *  were previously set remain set.
         575                 :     */
         576                 :     fmtflags
         577                 :     setf(fmtflags __fmtfl)
         578                 :     {
         579                 :       fmtflags __old = _M_flags;
         580                 :       _M_flags |= __fmtfl;
         581                 :       return __old;
         582                 :     }
         583                 :
         584                 :     /**
         585                 :      *  @brief  Setting new format flags.
         586                 :      *  @param  fmtfl  Additional flags to set.
         587                 :      *  @param  mask  The flags mask for @a fmtfl.
         588                 :      *  @return  The previous format control flags.
         589                 :      *
         590                 :      *  This function clears @a mask in the format flags, then sets
         591                 :      *  @a fmtfl @c & @a mask.  An example mask is @c ios_base::adjustfield.
         592                 :     */
         593                 :     fmtflags
         594                 :     setf(fmtflags __fmtfl, fmtflags __mask)
         595                 :     {
         596                 :       fmtflags __old = _M_flags;
         597                 :       _M_flags &= ~__mask;
         598                 :       _M_flags |= (__fmtfl & __mask);
         599                 :       return __old;
         600                 :     }
         601                 :
         602                 :     /**
         603                 :      *  @brief  Clearing format flags.
         604                 :      *  @param  mask  The flags to unset.
         605                 :      *
         606                 :      *  This function clears @a mask in the format flags.
         607                 :     */
         608                 :     void
         609                 :     unsetf(fmtflags __mask)
         610                 :     { _M_flags &= ~__mask; }
         611                 :
         612                 :     /**
         613                 :      *  @brief  Flags access.
         614                 :      *  @return  The precision to generate on certain output operations.
         615                 :      *
         616                 :      *  Be careful if you try to give a definition of @a precision here; see
         617                 :      *  DR 189.
         618                 :     */
         619                 :     streamsize
         620                 :     precision() const
         621                 :     { return _M_precision; }
         622                 :
         623                 :     /**
         624                 :      *  @brief  Changing flags.
         625                 :      *  @param  prec  The new precision value.
         626                 :      *  @return  The previous value of precision().
         627                 :     */
         628                 :     streamsize
         629                 :     precision(streamsize __prec)
         630                 :     {
         631                 :       streamsize __old = _M_precision;
         632                 :       _M_precision = __prec;
         633                 :       return __old;
         634                 :     }
         635                 :
         636                 :     /**
         637                 :      *  @brief  Flags access.
         638                 :      *  @return  The minimum field width to generate on output operations.
         639                 :      *
         640                 :      *  <em>Minimum field width</em> refers to the number of characters.
         641                 :     */
         642                 :     streamsize
         643               0 :     width() const
         644               0 :     { return _M_width; }
         645                 :
         646                 :     /**
         647                 :      *  @brief  Changing flags.
         648                 :      *  @param  wide  The new width value.
         649                 :      *  @return  The previous value of width().
         650                 :     */
         651                 :     streamsize
         652               0 :     width(streamsize __wide)
         653                 :     {
         654               0 :       streamsize __old = _M_width;
         655               0 :       _M_width = __wide;
         656               0 :       return __old;
         657                 :     }
         658                 :
         659                 :     // [27.4.2.4] ios_base static members
         660                 :     /**
         661                 :      *  @brief  Interaction with the standard C I/O objects.
         662                 :      *  @param  sync  Whether to synchronize or not.
         663                 :      *  @return  True if the standard streams were previously synchronized.
         664                 :      *
         665                 :      *  The synchronization referred to is @e only that between the standard
         666                 :      *  C facilities (e.g., stdout) and the standard C++ objects (e.g.,
         667                 :      *  cout).  User-declared streams are unaffected.  See
         668                 :      *  http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch28s02.html
         669                 :     */
         670                 :     static bool
         671                 :     sync_with_stdio(bool __sync = true);
         672                 :
         673                 :     // [27.4.2.3] ios_base locale functions
         674                 :     /**
         675                 :      *  @brief  Setting a new locale.
         676                 :      *  @param  loc  The new locale.
         677                 :      *  @return  The previous locale.
         678                 :      *
         679                 :      *  Sets the new locale for this stream, and then invokes each callback
         680                 :      *  with imbue_event.
         681                 :     */
         682                 :     locale
         683                 :     imbue(const locale& __loc) throw();
         684                 :
         685                 :     /**
         686                 :      *  @brief  Locale access
         687                 :      *  @return  A copy of the current locale.
         688                 :      *
         689                 :      *  If @c imbue(loc) has previously been called, then this function
         690                 :      *  returns @c loc.  Otherwise, it returns a copy of @c std::locale(),
         691                 :      *  the global C++ locale.
         692                 :     */
         693                 :     locale
         694                 :     getloc() const
         695                 :     { return _M_ios_locale; }
         696                 :
         697                 :     /**
         698                 :      *  @brief  Locale access
         699                 :      *  @return  A reference to the current locale.
         700                 :      *
         701                 :      *  Like getloc above, but returns a reference instead of
         702                 :      *  generating a copy.
         703                 :     */
         704                 :     const locale&
         705                 :     _M_getloc() const
         706                 :     { return _M_ios_locale; }
         707                 :
         708                 :     // [27.4.2.5] ios_base storage functions
         709                 :     /**
         710                 :      *  @brief  Access to unique indices.
         711                 :      *  @return  An integer different from all previous calls.
         712                 :      *
         713                 :      *  This function returns a unique integer every time it is called.  It
         714                 :      *  can be used for any purpose, but is primarily intended to be a unique
         715                 :      *  index for the iword and pword functions.  The expectation is that an
         716                 :      *  application calls xalloc in order to obtain an index in the iword and
         717                 :      *  pword arrays that can be used without fear of conflict.
         718                 :      *
         719                 :      *  The implementation maintains a static variable that is incremented and
         720                 :      *  returned on each invocation.  xalloc is guaranteed to return an index
         721                 :      *  that is safe to use in the iword and pword arrays.
         722                 :     */
         723                 :     static int
         724                 :     xalloc() throw();
         725                 :
         726                 :     /**
         727                 :      *  @brief  Access to integer array.
         728                 :      *  @param  __ix  Index into the array.
         729                 :      *  @return  A reference to an integer associated with the index.
         730                 :      *
         731                 :      *  The iword function provides access to an array of integers that can be
         732                 :      *  used for any purpose.  The array grows as required to hold the
         733                 :      *  supplied index.  All integers in the array are initialized to 0.
         734                 :      *
         735                 :      *  The implementation reserves several indices.  You should use xalloc to
         736                 :      *  obtain an index that is safe to use.  Also note that since the array
         737                 :      *  can grow dynamically, it is not safe to hold onto the reference.
         738                 :     */
         739                 :     long&
         740                 :     iword(int __ix)
         741                 :     {
         742                 :       _Words& __word = (__ix < _M_word_size)
         743                 :                         ? _M_word[__ix] : _M_grow_words(__ix, true);
         744                 :       return __word._M_iword;
         745                 :     }
         746                 :
         747                 :     /**
         748                 :      *  @brief  Access to void pointer array.
         749                 :      *  @param  __ix  Index into the array.
         750                 :      *  @return  A reference to a void* associated with the index.
         751                 :      *
         752                 :      *  The pword function provides access to an array of pointers that can be
         753                 :      *  used for any purpose.  The array grows as required to hold the
         754                 :      *  supplied index.  All pointers in the array are initialized to 0.
         755                 :      *
         756                 :      *  The implementation reserves several indices.  You should use xalloc to
         757                 :      *  obtain an index that is safe to use.  Also note that since the array
         758                 :      *  can grow dynamically, it is not safe to hold onto the reference.
         759                 :     */
         760                 :     void*&
         761                 :     pword(int __ix)
         762                 :     {
         763                 :       _Words& __word = (__ix < _M_word_size)
         764                 :                         ? _M_word[__ix] : _M_grow_words(__ix, false);
         765                 :       return __word._M_pword;
         766                 :     }
         767                 :
         768                 :     // Destructor
         769                 :     /**
         770                 :      *  Invokes each callback with erase_event.  Destroys local storage.
         771                 :      *
         772                 :      *  Note that the ios_base object for the standard streams never gets
         773                 :      *  destroyed.  As a result, any callbacks registered with the standard
         774                 :      *  streams will not get invoked with erase_event (unless copyfmt is
         775                 :      *  used).
         776                 :     */
         777                 :     virtual ~ios_base();
         778                 :
         779                 :   protected:
         780                 :     ios_base() throw ();
         781                 :
         782                 :   // _GLIBCXX_RESOLVE_LIB_DEFECTS
         783                 :   // 50.  Copy constructor and assignment operator of ios_base
         784                 :   private:
         785                 :     ios_base(const ios_base&);
         786                 :
         787                 :     ios_base&
         788                 :     operator=(const ios_base&);
         789                 :   };
         790                 :
         791                 :   // [27.4.5.1] fmtflags manipulators
         792                 :   /// Calls base.setf(ios_base::boolalpha).
         793                 :   inline ios_base&
         794                 :   boolalpha(ios_base& __base)
         795                 :   {
         796                 :     __base.setf(ios_base::boolalpha);
         797                 :     return __base;
         798                 :   }
         799                 :
         800                 :   /// Calls base.unsetf(ios_base::boolalpha).
         801                 :   inline ios_base&
         802                 :   noboolalpha(ios_base& __base)
         803                 :   {
         804                 :     __base.unsetf(ios_base::boolalpha);
         805                 :     return __base;
         806                 :   }
         807                 :
         808                 :   /// Calls base.setf(ios_base::showbase).
         809                 :   inline ios_base&
         810                 :   showbase(ios_base& __base)
         811                 :   {
         812                 :     __base.setf(ios_base::showbase);
         813                 :     return __base;
         814                 :   }
         815                 :
         816                 :   /// Calls base.unsetf(ios_base::showbase).
         817                 :   inline ios_base&
         818                 :   noshowbase(ios_base& __base)
         819                 :   {
         820                 :     __base.unsetf(ios_base::showbase);
         821                 :     return __base;
         822                 :   }
         823                 :
         824                 :   /// Calls base.setf(ios_base::showpoint).
         825                 :   inline ios_base&
         826                 :   showpoint(ios_base& __base)
         827                 :   {
         828                 :     __base.setf(ios_base::showpoint);
         829                 :     return __base;
         830                 :   }
         831                 :
         832                 :   /// Calls base.unsetf(ios_base::showpoint).
         833                 :   inline ios_base&
         834                 :   noshowpoint(ios_base& __base)
         835                 :   {
         836                 :     __base.unsetf(ios_base::showpoint);
         837                 :     return __base;
         838                 :   }
         839                 :
         840                 :   /// Calls base.setf(ios_base::showpos).
         841                 :   inline ios_base&
         842                 :   showpos(ios_base& __base)
         843                 :   {
         844                 :     __base.setf(ios_base::showpos);
         845                 :     return __base;
         846                 :   }
         847                 :
         848                 :   /// Calls base.unsetf(ios_base::showpos).
         849                 :   inline ios_base&
         850                 :   noshowpos(ios_base& __base)
         851                 :   {
         852                 :     __base.unsetf(ios_base::showpos);
         853                 :     return __base;
         854                 :   }
         855                 :
         856                 :   /// Calls base.setf(ios_base::skipws).
         857                 :   inline ios_base&
         858                 :   skipws(ios_base& __base)
         859                 :   {
         860                 :     __base.setf(ios_base::skipws);
         861                 :     return __base;
         862                 :   }
         863                 :
         864                 :   /// Calls base.unsetf(ios_base::skipws).
         865                 :   inline ios_base&
         866                 :   noskipws(ios_base& __base)
         867                 :   {
         868                 :     __base.unsetf(ios_base::skipws);
         869                 :     return __base;
         870                 :   }
         871                 :
         872                 :   /// Calls base.setf(ios_base::uppercase).
         873                 :   inline ios_base&
         874                 :   uppercase(ios_base& __base)
         875                 :   {
         876                 :     __base.setf(ios_base::uppercase);
         877                 :     return __base;
         878                 :   }
         879                 :
         880                 :   /// Calls base.unsetf(ios_base::uppercase).
         881                 :   inline ios_base&
         882                 :   nouppercase(ios_base& __base)
         883                 :   {
         884                 :     __base.unsetf(ios_base::uppercase);
         885                 :     return __base;
         886                 :   }
         887                 :
         888                 :   /// Calls base.setf(ios_base::unitbuf).
         889                 :   inline ios_base&
         890                 :   unitbuf(ios_base& __base)
         891                 :   {
         892                 :      __base.setf(ios_base::unitbuf);
         893                 :      return __base;
         894                 :   }
         895                 :
         896                 :   /// Calls base.unsetf(ios_base::unitbuf).
         897                 :   inline ios_base&
         898                 :   nounitbuf(ios_base& __base)
         899                 :   {
         900                 :      __base.unsetf(ios_base::unitbuf);
         901                 :      return __base;
         902                 :   }
         903                 :
         904                 :   // [27.4.5.2] adjustfield manipulators
         905                 :   /// Calls base.setf(ios_base::internal, ios_base::adjustfield).
         906                 :   inline ios_base&
         907                 :   internal(ios_base& __base)
         908                 :   {
         909                 :      __base.setf(ios_base::internal, ios_base::adjustfield);
         910                 :      return __base;
         911                 :   }
         912                 :
         913                 :   /// Calls base.setf(ios_base::left, ios_base::adjustfield).
         914                 :   inline ios_base&
         915                 :   left(ios_base& __base)
         916                 :   {
         917                 :     __base.setf(ios_base::left, ios_base::adjustfield);
         918                 :     return __base;
         919                 :   }
         920                 :
         921                 :   /// Calls base.setf(ios_base::right, ios_base::adjustfield).
         922                 :   inline ios_base&
         923                 :   right(ios_base& __base)
         924                 :   {
         925                 :     __base.setf(ios_base::right, ios_base::adjustfield);
         926                 :     return __base;
         927                 :   }
         928                 :
         929                 :   // [27.4.5.3] basefield manipulators
         930                 :   /// Calls base.setf(ios_base::dec, ios_base::basefield).
         931                 :   inline ios_base&
         932                 :   dec(ios_base& __base)
         933                 :   {
         934                 :     __base.setf(ios_base::dec, ios_base::basefield);
         935                 :     return __base;
         936                 :   }
         937                 :
         938                 :   /// Calls base.setf(ios_base::hex, ios_base::basefield).
         939                 :   inline ios_base&
         940                 :   hex(ios_base& __base)
         941                 :   {
         942                 :     __base.setf(ios_base::hex, ios_base::basefield);
         943                 :     return __base;
         944                 :   }
         945                 :
         946                 :   /// Calls base.setf(ios_base::oct, ios_base::basefield).
         947                 :   inline ios_base&
         948                 :   oct(ios_base& __base)
         949                 :   {
         950                 :     __base.setf(ios_base::oct, ios_base::basefield);
         951                 :     return __base;
         952                 :   }
         953                 :
         954                 :   // [27.4.5.4] floatfield manipulators
         955                 :   /// Calls base.setf(ios_base::fixed, ios_base::floatfield).
         956                 :   inline ios_base&
         957                 :   fixed(ios_base& __base)
         958                 :   {
         959                 :     __base.setf(ios_base::fixed, ios_base::floatfield);
         960                 :     return __base;
         961                 :   }
         962                 :
         963                 :   /// Calls base.setf(ios_base::scientific, ios_base::floatfield).
         964                 :   inline ios_base&
         965                 :   scientific(ios_base& __base)
         966                 :   {
         967                 :     __base.setf(ios_base::scientific, ios_base::floatfield);
         968                 :     return __base;
         969                 :   }
         970                 :
         971                 : _GLIBCXX_END_NAMESPACE
         972                 :
         973                 : #undef _IOS_BASE_SEEK_CUR
         974                 : #undef _IOS_BASE_SEEK_END
         975                 :
         976                 : #endif /* _IOS_BASE_H */
         977                 :

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