wpkg test coverage results

Coverage test results of the Windows Packager by Made to Order Software Corporation.

LCOV - code coverage report
Current view: top level - usr/include/c++/4.6/bits - basic_ios.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 16 0.0 %
Date: 2013-06-17 Functions: 0 8 0.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : // Iostreams base classes -*- C++ -*-
       2             : 
       3             : // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
       4             : // 2006, 2007, 2008, 2009, 2010, 2011
       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 bits/basic_ios.h
      28             :  *  This is an internal header file, included by other library headers.
      29             :  *  Do not attempt to use it directly. @headername{ios}
      30             :  */
      31             : 
      32             : #ifndef _BASIC_IOS_H
      33             : #define _BASIC_IOS_H 1
      34             : 
      35             : #pragma GCC system_header
      36             : 
      37             : #include <bits/localefwd.h>
      38             : #include <bits/locale_classes.h>
      39             : #include <bits/locale_facets.h>
      40             : #include <bits/streambuf_iterator.h>
      41             : 
      42             : namespace std _GLIBCXX_VISIBILITY(default)
      43             : {
      44             : _GLIBCXX_BEGIN_NAMESPACE_VERSION
      45             : 
      46             :   template<typename _Facet>
      47             :     inline const _Facet&
      48           0 :     __check_facet(const _Facet* __f)
      49             :     {
      50           0 :       if (!__f)
      51           0 :         __throw_bad_cast();
      52           0 :       return *__f;
      53             :     }
      54             : 
      55             :   // 27.4.5  Template class basic_ios
      56             :   /**
      57             :    *  @brief  Virtual base class for all stream classes.
      58             :    *  @ingroup io
      59             :    *
      60             :    *  Most of the member functions called dispatched on stream objects
      61             :    *  (e.g., @c std::cout.foo(bar);) are consolidated in this class.
      62             :   */
      63             :   template<typename _CharT, typename _Traits>
      64             :     class basic_ios : public ios_base
      65             :     {
      66             :     public:
      67             :       //@{
      68             :       /**
      69             :        *  These are standard types.  They permit a standardized way of
      70             :        *  referring to names of (or names dependant on) the template
      71             :        *  parameters, which are specific to the implementation.
      72             :       */
      73             :       typedef _CharT                                 char_type;
      74             :       typedef typename _Traits::int_type             int_type;
      75             :       typedef typename _Traits::pos_type             pos_type;
      76             :       typedef typename _Traits::off_type             off_type;
      77             :       typedef _Traits                                traits_type;
      78             :       //@}
      79             : 
      80             :       //@{
      81             :       /**
      82             :        *  These are non-standard types.
      83             :       */
      84             :       typedef ctype<_CharT>                          __ctype_type;
      85             :       typedef num_put<_CharT, ostreambuf_iterator<_CharT, _Traits> >
      86             :                                                      __num_put_type;
      87             :       typedef num_get<_CharT, istreambuf_iterator<_CharT, _Traits> >
      88             :                                                      __num_get_type;
      89             :       //@}
      90             : 
      91             :       // Data members:
      92             :     protected:
      93             :       basic_ostream<_CharT, _Traits>*                _M_tie;
      94             :       mutable char_type                              _M_fill;
      95             :       mutable bool                                   _M_fill_init;
      96             :       basic_streambuf<_CharT, _Traits>*              _M_streambuf;
      97             : 
      98             :       // Cached use_facet<ctype>, which is based on the current locale info.
      99             :       const __ctype_type*                            _M_ctype;
     100             :       // For ostream.
     101             :       const __num_put_type*                          _M_num_put;
     102             :       // For istream.
     103             :       const __num_get_type*                          _M_num_get;
     104             : 
     105             :     public:
     106             :       //@{
     107             :       /**
     108             :        *  @brief  The quick-and-easy status check.
     109             :        *
     110             :        *  This allows you to write constructs such as
     111             :        *  <code>if (!a_stream) ...</code> and <code>while (a_stream) ...</code>
     112             :       */
     113             :       operator void*() const
     114             :       { return this->fail() ? 0 : const_cast<basic_ios*>(this); }
     115             : 
     116             :       bool
     117             :       operator!() const
     118             :       { return this->fail(); }
     119             :       //@}
     120             : 
     121             :       /**
     122             :        *  @brief  Returns the error state of the stream buffer.
     123             :        *  @return  A bit pattern (well, isn't everything?)
     124             :        *
     125             :        *  See std::ios_base::iostate for the possible bit values.  Most
     126             :        *  users will call one of the interpreting wrappers, e.g., good().
     127             :       */
     128             :       iostate
     129           0 :       rdstate() const
     130           0 :       { return _M_streambuf_state; }
     131             : 
     132             :       /**
     133             :        *  @brief  [Re]sets the error state.
     134             :        *  @param  state  The new state flag(s) to set.
     135             :        *
     136             :        *  See std::ios_base::iostate for the possible bit values.  Most
     137             :        *  users will not need to pass an argument.
     138             :       */
     139             :       void
     140             :       clear(iostate __state = goodbit);
     141             : 
     142             :       /**
     143             :        *  @brief  Sets additional flags in the error state.
     144             :        *  @param  state  The additional state flag(s) to set.
     145             :        *
     146             :        *  See std::ios_base::iostate for the possible bit values.
     147             :       */
     148             :       void
     149           0 :       setstate(iostate __state)
     150           0 :       { this->clear(this->rdstate() | __state); }
     151             : 
     152             :       // Flip the internal state on for the proper state bits, then re
     153             :       // throws the propagated exception if bit also set in
     154             :       // exceptions().
     155             :       void
     156             :       _M_setstate(iostate __state)
     157             :       {
     158             :         // 27.6.1.2.1 Common requirements.
     159             :         // Turn this on without causing an ios::failure to be thrown.
     160             :         _M_streambuf_state |= __state;
     161             :         if (this->exceptions() & __state)
     162             :           __throw_exception_again;
     163             :       }
     164             : 
     165             :       /**
     166             :        *  @brief  Fast error checking.
     167             :        *  @return  True if no error flags are set.
     168             :        *
     169             :        *  A wrapper around rdstate.
     170             :       */
     171             :       bool
     172           0 :       good() const
     173           0 :       { return this->rdstate() == 0; }
     174             : 
     175             :       /**
     176             :        *  @brief  Fast error checking.
     177             :        *  @return  True if the eofbit is set.
     178             :        *
     179             :        *  Note that other iostate flags may also be set.
     180             :       */
     181             :       bool
     182             :       eof() const
     183             :       { return (this->rdstate() & eofbit) != 0; }
     184             : 
     185             :       /**
     186             :        *  @brief  Fast error checking.
     187             :        *  @return  True if either the badbit or the failbit is set.
     188             :        *
     189             :        *  Checking the badbit in fail() is historical practice.
     190             :        *  Note that other iostate flags may also be set.
     191             :       */
     192             :       bool
     193             :       fail() const
     194             :       { return (this->rdstate() & (badbit | failbit)) != 0; }
     195             : 
     196             :       /**
     197             :        *  @brief  Fast error checking.
     198             :        *  @return  True if the badbit is set.
     199             :        *
     200             :        *  Note that other iostate flags may also be set.
     201             :       */
     202             :       bool
     203             :       bad() const
     204             :       { return (this->rdstate() & badbit) != 0; }
     205             : 
     206             :       /**
     207             :        *  @brief  Throwing exceptions on errors.
     208             :        *  @return  The current exceptions mask.
     209             :        *
     210             :        *  This changes nothing in the stream.  See the one-argument version
     211             :        *  of exceptions(iostate) for the meaning of the return value.
     212             :       */
     213             :       iostate
     214             :       exceptions() const
     215             :       { return _M_exception; }
     216             : 
     217             :       /**
     218             :        *  @brief  Throwing exceptions on errors.
     219             :        *  @param  except  The new exceptions mask.
     220             :        *
     221             :        *  By default, error flags are set silently.  You can set an
     222             :        *  exceptions mask for each stream; if a bit in the mask becomes set
     223             :        *  in the error flags, then an exception of type
     224             :        *  std::ios_base::failure is thrown.
     225             :        *
     226             :        *  If the error flag is already set when the exceptions mask is
     227             :        *  added, the exception is immediately thrown.  Try running the
     228             :        *  following under GCC 3.1 or later:
     229             :        *  @code
     230             :        *  #include <iostream>
     231             :        *  #include <fstream>
     232             :        *  #include <exception>
     233             :        *
     234             :        *  int main()
     235             :        *  {
     236             :        *      std::set_terminate (__gnu_cxx::__verbose_terminate_handler);
     237             :        *
     238             :        *      std::ifstream f ("/etc/motd");
     239             :        *
     240             :        *      std::cerr << "Setting badbit\n";
     241             :        *      f.setstate (std::ios_base::badbit);
     242             :        *
     243             :        *      std::cerr << "Setting exception mask\n";
     244             :        *      f.exceptions (std::ios_base::badbit);
     245             :        *  }
     246             :        *  @endcode
     247             :       */
     248             :       void
     249             :       exceptions(iostate __except)
     250             :       {
     251             :         _M_exception = __except;
     252             :         this->clear(_M_streambuf_state);
     253             :       }
     254             : 
     255             :       // Constructor/destructor:
     256             :       /**
     257             :        *  @brief  Constructor performs initialization.
     258             :        *
     259             :        *  The parameter is passed by derived streams.
     260             :       */
     261             :       explicit
     262             :       basic_ios(basic_streambuf<_CharT, _Traits>* __sb)
     263             :       : ios_base(), _M_tie(0), _M_fill(), _M_fill_init(false), _M_streambuf(0),
     264             :         _M_ctype(0), _M_num_put(0), _M_num_get(0)
     265             :       { this->init(__sb); }
     266             : 
     267             :       /**
     268             :        *  @brief  Empty.
     269             :        *
     270             :        *  The destructor does nothing.  More specifically, it does not
     271             :        *  destroy the streambuf held by rdbuf().
     272             :       */
     273             :       virtual
     274           0 :       ~basic_ios() { }
     275             : 
     276             :       // Members:
     277             :       /**
     278             :        *  @brief  Fetches the current @e tied stream.
     279             :        *  @return  A pointer to the tied stream, or NULL if the stream is
     280             :        *           not tied.
     281             :        *
     282             :        *  A stream may be @e tied (or synchronized) to a second output
     283             :        *  stream.  When this stream performs any I/O, the tied stream is
     284             :        *  first flushed.  For example, @c std::cin is tied to @c std::cout.
     285             :       */
     286             :       basic_ostream<_CharT, _Traits>*
     287             :       tie() const
     288             :       { return _M_tie; }
     289             : 
     290             :       /**
     291             :        *  @brief  Ties this stream to an output stream.
     292             :        *  @param  tiestr  The output stream.
     293             :        *  @return  The previously tied output stream, or NULL if the stream
     294             :        *           was not tied.
     295             :        *
     296             :        *  This sets up a new tie; see tie() for more.
     297             :       */
     298             :       basic_ostream<_CharT, _Traits>*
     299             :       tie(basic_ostream<_CharT, _Traits>* __tiestr)
     300             :       {
     301             :         basic_ostream<_CharT, _Traits>* __old = _M_tie;
     302             :         _M_tie = __tiestr;
     303             :         return __old;
     304             :       }
     305             : 
     306             :       /**
     307             :        *  @brief  Accessing the underlying buffer.
     308             :        *  @return  The current stream buffer.
     309             :        *
     310             :        *  This does not change the state of the stream.
     311             :       */
     312             :       basic_streambuf<_CharT, _Traits>*
     313             :       rdbuf() const
     314             :       { return _M_streambuf; }
     315             : 
     316             :       /**
     317             :        *  @brief  Changing the underlying buffer.
     318             :        *  @param  sb  The new stream buffer.
     319             :        *  @return  The previous stream buffer.
     320             :        *
     321             :        *  Associates a new buffer with the current stream, and clears the
     322             :        *  error state.
     323             :        *
     324             :        *  Due to historical accidents which the LWG refuses to correct, the
     325             :        *  I/O library suffers from a design error:  this function is hidden
     326             :        *  in derived classes by overrides of the zero-argument @c rdbuf(),
     327             :        *  which is non-virtual for hysterical raisins.  As a result, you
     328             :        *  must use explicit qualifications to access this function via any
     329             :        *  derived class.  For example:
     330             :        *
     331             :        *  @code
     332             :        *  std::fstream     foo;         // or some other derived type
     333             :        *  std::streambuf*  p = .....;
     334             :        *
     335             :        *  foo.ios::rdbuf(p);            // ios == basic_ios<char>
     336             :        *  @endcode
     337             :       */
     338             :       basic_streambuf<_CharT, _Traits>*
     339             :       rdbuf(basic_streambuf<_CharT, _Traits>* __sb);
     340             : 
     341             :       /**
     342             :        *  @brief  Copies fields of __rhs into this.
     343             :        *  @param  __rhs  The source values for the copies.
     344             :        *  @return  Reference to this object.
     345             :        *
     346             :        *  All fields of __rhs are copied into this object except that rdbuf()
     347             :        *  and rdstate() remain unchanged.  All values in the pword and iword
     348             :        *  arrays are copied.  Before copying, each callback is invoked with
     349             :        *  erase_event.  After copying, each (new) callback is invoked with
     350             :        *  copyfmt_event.  The final step is to copy exceptions().
     351             :       */
     352             :       basic_ios&
     353             :       copyfmt(const basic_ios& __rhs);
     354             : 
     355             :       /**
     356             :        *  @brief  Retrieves the @a empty character.
     357             :        *  @return  The current fill character.
     358             :        *
     359             :        *  It defaults to a space (' ') in the current locale.
     360             :       */
     361             :       char_type
     362             :       fill() const
     363             :       {
     364             :         if (!_M_fill_init)
     365             :           {
     366             :             _M_fill = this->widen(' ');
     367             :             _M_fill_init = true;
     368             :           }
     369             :         return _M_fill;
     370             :       }
     371             : 
     372             :       /**
     373             :        *  @brief  Sets a new @a empty character.
     374             :        *  @param  ch  The new character.
     375             :        *  @return  The previous fill character.
     376             :        *
     377             :        *  The fill character is used to fill out space when P+ characters
     378             :        *  have been requested (e.g., via setw), Q characters are actually
     379             :        *  used, and Q<P.  It defaults to a space (' ') in the current locale.
     380             :       */
     381             :       char_type
     382             :       fill(char_type __ch)
     383             :       {
     384             :         char_type __old = this->fill();
     385             :         _M_fill = __ch;
     386             :         return __old;
     387             :       }
     388             : 
     389             :       // Locales:
     390             :       /**
     391             :        *  @brief  Moves to a new locale.
     392             :        *  @param  loc  The new locale.
     393             :        *  @return  The previous locale.
     394             :        *
     395             :        *  Calls @c ios_base::imbue(loc), and if a stream buffer is associated
     396             :        *  with this stream, calls that buffer's @c pubimbue(loc).
     397             :        *
     398             :        *  Additional l10n notes are at
     399             :        *  http://gcc.gnu.org/onlinedocs/libstdc++/manual/localization.html
     400             :       */
     401             :       locale
     402             :       imbue(const locale& __loc);
     403             : 
     404             :       /**
     405             :        *  @brief  Squeezes characters.
     406             :        *  @param  c  The character to narrow.
     407             :        *  @param  dfault  The character to narrow.
     408             :        *  @return  The narrowed character.
     409             :        *
     410             :        *  Maps a character of @c char_type to a character of @c char,
     411             :        *  if possible.
     412             :        *
     413             :        *  Returns the result of
     414             :        *  @code
     415             :        *    std::use_facet<ctype<char_type> >(getloc()).narrow(c,dfault)
     416             :        *  @endcode
     417             :        *
     418             :        *  Additional l10n notes are at
     419             :        *  http://gcc.gnu.org/onlinedocs/libstdc++/manual/localization.html
     420             :       */
     421             :       char
     422             :       narrow(char_type __c, char __dfault) const
     423             :       { return __check_facet(_M_ctype).narrow(__c, __dfault); }
     424             : 
     425             :       /**
     426             :        *  @brief  Widens characters.
     427             :        *  @param  c  The character to widen.
     428             :        *  @return  The widened character.
     429             :        *
     430             :        *  Maps a character of @c char to a character of @c char_type.
     431             :        *
     432             :        *  Returns the result of
     433             :        *  @code
     434             :        *    std::use_facet<ctype<char_type> >(getloc()).widen(c)
     435             :        *  @endcode
     436             :        *
     437             :        *  Additional l10n notes are at
     438             :        *  http://gcc.gnu.org/onlinedocs/libstdc++/manual/localization.html
     439             :       */
     440             :       char_type
     441           0 :       widen(char __c) const
     442           0 :       { return __check_facet(_M_ctype).widen(__c); }
     443             : 
     444             :     protected:
     445             :       // 27.4.5.1  basic_ios constructors
     446             :       /**
     447             :        *  @brief  Empty.
     448             :        *
     449             :        *  The default constructor does nothing and is not normally
     450             :        *  accessible to users.
     451             :       */
     452           0 :       basic_ios()
     453             :       : ios_base(), _M_tie(0), _M_fill(char_type()), _M_fill_init(false), 
     454           0 :         _M_streambuf(0), _M_ctype(0), _M_num_put(0), _M_num_get(0)
     455           0 :       { }
     456             : 
     457             :       /**
     458             :        *  @brief  All setup is performed here.
     459             :        *
     460             :        *  This is called from the public constructor.  It is not virtual and
     461             :        *  cannot be redefined.
     462             :       */
     463             :       void
     464             :       init(basic_streambuf<_CharT, _Traits>* __sb);
     465             : 
     466             :       void
     467             :       _M_cache_locale(const locale& __loc);
     468             :     };
     469             : 
     470             : _GLIBCXX_END_NAMESPACE_VERSION
     471             : } // namespace
     472             : 
     473             : #include <bits/basic_ios.tcc>
     474             : 
     475             : #endif /* _BASIC_IOS_H */

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