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The C and C++ Include Header Files

/usr/include/c++/11/bits/ostream_insert.h


$ cat -n /usr/include/c++/11/bits/ostream_insert.h

     1	// Helpers for ostream inserters -*- C++ -*-
     2	
     3	// Copyright (C) 2007-2021 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	  template<typename _CharT, typename _Traits>
    44	    inline void
    45	    __ostream_write(basic_ostream<_CharT, _Traits>& __out,
    46			    const _CharT* __s, streamsize __n)
    47	    {
    48	      typedef basic_ostream<_CharT, _Traits>       __ostream_type;      
    49	      typedef typename __ostream_type::ios_base    __ios_base;
    50	
    51	      const streamsize __put = __out.rdbuf()->sputn(__s, __n);
    52	      if (__put != __n)
    53		__out.setstate(__ios_base::badbit);
    54	    }
    55	
    56	  template<typename _CharT, typename _Traits>
    57	    inline void
    58	    __ostream_fill(basic_ostream<_CharT, _Traits>& __out, streamsize __n)
    59	    {
    60	      typedef basic_ostream<_CharT, _Traits>       __ostream_type;      
    61	      typedef typename __ostream_type::ios_base    __ios_base;
    62	
    63	      const _CharT __c = __out.fill();
    64	      for (; __n > 0; --__n)
    65		{
    66		  const typename _Traits::int_type __put = __out.rdbuf()->sputc(__c);
    67		  if (_Traits::eq_int_type(__put, _Traits::eof()))
    68		    {
    69		      __out.setstate(__ios_base::badbit);
    70		      break;
    71		    }
    72		}
    73	    }
    74	
    75	  template<typename _CharT, typename _Traits>
    76	    basic_ostream<_CharT, _Traits>&
    77	    __ostream_insert(basic_ostream<_CharT, _Traits>& __out,
    78			     const _CharT* __s, streamsize __n)
    79	    {
    80	      typedef basic_ostream<_CharT, _Traits>       __ostream_type;
    81	      typedef typename __ostream_type::ios_base    __ios_base;
    82	
    83	      typename __ostream_type::sentry __cerb(__out);
    84	      if (__cerb)
    85		{
    86		  __try
    87		    {
    88		      const streamsize __w = __out.width();
    89		      if (__w > __n)
    90			{
    91			  const bool __left = ((__out.flags()
    92						& __ios_base::adjustfield)
    93					       == __ios_base::left);
    94			  if (!__left)
    95			    __ostream_fill(__out, __w - __n);
    96			  if (__out.good())
    97			    __ostream_write(__out, __s, __n);
    98			  if (__left && __out.good())
    99			    __ostream_fill(__out, __w - __n);
   100			}
   101		      else
   102			__ostream_write(__out, __s, __n);
   103		      __out.width(0);
   104		    }
   105		  __catch(__cxxabiv1::__forced_unwind&)
   106		    {
   107		      __out._M_setstate(__ios_base::badbit);
   108		      __throw_exception_again;
   109		    }
   110		  __catch(...)
   111		    { __out._M_setstate(__ios_base::badbit); }
   112		}
   113	      return __out;
   114	    }
   115	
   116	  // Inhibit implicit instantiations for required instantiations,
   117	  // which are defined via explicit instantiations elsewhere.
   118	#if _GLIBCXX_EXTERN_TEMPLATE
   119	  extern template ostream& __ostream_insert(ostream&, const char*, streamsize);
   120	
   121	#ifdef _GLIBCXX_USE_WCHAR_T
   122	  extern template wostream& __ostream_insert(wostream&, const wchar_t*,
   123						     streamsize);
   124	#endif
   125	#endif
   126	
   127	_GLIBCXX_END_NAMESPACE_VERSION
   128	} // namespace std
   129	
   130	#endif /* _OSTREAM_INSERT_H */