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The C and C++ Include Header Files

/usr/include/c++/13/bits/ostream_insert.h


$ cat -n /usr/include/c++/13/bits/ostream_insert.h

     1	// Helpers for ostream inserters -*- C++ -*-
     2	
     3	// Copyright (C) 2007-2023 Free Software Foundation, Inc.
     4	//
     5	// This file is part of the GNU ISO C++ Library.  This library is free
     6	// software; you can redistribute it and/or modify it under the
     7	// terms of the GNU General Public License as published by the
     8	// Free Software Foundation; either version 3, or (at your option)
     9	// any later version.
    10	
    11	// This library is distributed in the hope that it will be useful,
    12	// but WITHOUT ANY WARRANTY; without even the implied warranty of
    13	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    14	// GNU General Public License for more details.
    15	
    16	// Under Section 7 of GPL version 3, you are granted additional
    17	// permissions described in the GCC Runtime Library Exception, version
    18	// 3.1, as published by the Free Software Foundation.
    19	
    20	// You should have received a copy of the GNU General Public License and
    21	// a copy of the GCC Runtime Library Exception along with this program;
    22	// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
    23	// <http://www.gnu.org/licenses/>.
    24	
    25	/** @file bits/ostream_insert.h
    26	 *  This is an internal header file, included by other library headers.
    27	 *  Do not attempt to use it directly. @headername{ostream}
    28	 */
    29	
    30	#ifndef _OSTREAM_INSERT_H
    31	#define _OSTREAM_INSERT_H 1
    32	
    33	#pragma GCC system_header
    34	
    35	#include <iosfwd>
    36	#include <bits/cxxabi_forced.h>
    37	#include <bits/exception_defines.h>
    38	
    39	namespace std _GLIBCXX_VISIBILITY(default)
    40	{
    41	_GLIBCXX_BEGIN_NAMESPACE_VERSION
    42	
    43	  /// @cond undocumented
    44	
    45	  template<typename _CharT, typename _Traits>
    46	    inline void
    47	    __ostream_write(basic_ostream<_CharT, _Traits>& __out,
    48			    const _CharT* __s, streamsize __n)
    49	    {
    50	      typedef basic_ostream<_CharT, _Traits>       __ostream_type;      
    51	      typedef typename __ostream_type::ios_base    __ios_base;
    52	
    53	      const streamsize __put = __out.rdbuf()->sputn(__s, __n);
    54	      if (__put != __n)
    55		__out.setstate(__ios_base::badbit);
    56	    }
    57	
    58	  template<typename _CharT, typename _Traits>
    59	    inline void
    60	    __ostream_fill(basic_ostream<_CharT, _Traits>& __out, streamsize __n)
    61	    {
    62	      typedef basic_ostream<_CharT, _Traits>       __ostream_type;      
    63	      typedef typename __ostream_type::ios_base    __ios_base;
    64	
    65	      const _CharT __c = __out.fill();
    66	      for (; __n > 0; --__n)
    67		{
    68		  const typename _Traits::int_type __put = __out.rdbuf()->sputc(__c);
    69		  if (_Traits::eq_int_type(__put, _Traits::eof()))
    70		    {
    71		      __out.setstate(__ios_base::badbit);
    72		      break;
    73		    }
    74		}
    75	    }
    76	
    77	  template<typename _CharT, typename _Traits>
    78	    basic_ostream<_CharT, _Traits>&
    79	    __ostream_insert(basic_ostream<_CharT, _Traits>& __out,
    80			     const _CharT* __s, streamsize __n)
    81	    {
    82	      typedef basic_ostream<_CharT, _Traits>       __ostream_type;
    83	      typedef typename __ostream_type::ios_base    __ios_base;
    84	
    85	      typename __ostream_type::sentry __cerb(__out);
    86	      if (__cerb)
    87		{
    88		  __try
    89		    {
    90		      const streamsize __w = __out.width();
    91		      if (__w > __n)
    92			{
    93			  const bool __left = ((__out.flags()
    94						& __ios_base::adjustfield)
    95					       == __ios_base::left);
    96			  if (!__left)
    97			    __ostream_fill(__out, __w - __n);
    98			  if (__out.good())
    99			    __ostream_write(__out, __s, __n);
   100			  if (__left && __out.good())
   101			    __ostream_fill(__out, __w - __n);
   102			}
   103		      else
   104			__ostream_write(__out, __s, __n);
   105		      __out.width(0);
   106		    }
   107		  __catch(__cxxabiv1::__forced_unwind&)
   108		    {
   109		      __out._M_setstate(__ios_base::badbit);
   110		      __throw_exception_again;
   111		    }
   112		  __catch(...)
   113		    { __out._M_setstate(__ios_base::badbit); }
   114		}
   115	      return __out;
   116	    }
   117	
   118	  // Inhibit implicit instantiations for required instantiations,
   119	  // which are defined via explicit instantiations elsewhere.
   120	#if _GLIBCXX_EXTERN_TEMPLATE
   121	  extern template ostream& __ostream_insert(ostream&, const char*, streamsize);
   122	
   123	#ifdef _GLIBCXX_USE_WCHAR_T
   124	  extern template wostream& __ostream_insert(wostream&, const wchar_t*,
   125						     streamsize);
   126	#endif
   127	#endif
   128	
   129	  /// @endcond
   130	
   131	_GLIBCXX_END_NAMESPACE_VERSION
   132	} // namespace std
   133	
   134	#endif /* _OSTREAM_INSERT_H */