1// Helpers for ostream inserters -*- C++ -*-
2
3// Copyright (C) 2007-2015 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
38namespace std _GLIBCXX_VISIBILITY(default)
39{
40_GLIBCXX_BEGIN_NAMESPACE_VERSION
41
42  template<typename _CharT, typename _Traits>
43    inline void
44    __ostream_write(basic_ostream<_CharT, _Traits>& __out,
45		    const _CharT* __s, streamsize __n)
46    {
47      typedef basic_ostream<_CharT, _Traits>       __ostream_type;
48      typedef typename __ostream_type::ios_base    __ios_base;
49
50      const streamsize __put = __out.rdbuf()->sputn(__s, __n);
51      if (__put != __n)
52	__out.setstate(__ios_base::badbit);
53    }
54
55  template<typename _CharT, typename _Traits>
56    inline void
57    __ostream_fill(basic_ostream<_CharT, _Traits>& __out, streamsize __n)
58    {
59      typedef basic_ostream<_CharT, _Traits>       __ostream_type;
60      typedef typename __ostream_type::ios_base    __ios_base;
61
62      const _CharT __c = __out.fill();
63      for (; __n > 0; --__n)
64	{
65	  const typename _Traits::int_type __put = __out.rdbuf()->sputc(__c);
66	  if (_Traits::eq_int_type(__put, _Traits::eof()))
67	    {
68	      __out.setstate(__ios_base::badbit);
69	      break;
70	    }
71	}
72    }
73
74  template<typename _CharT, typename _Traits>
75    basic_ostream<_CharT, _Traits>&
76    __ostream_insert(basic_ostream<_CharT, _Traits>& __out,
77		     const _CharT* __s, streamsize __n)
78    {
79      typedef basic_ostream<_CharT, _Traits>       __ostream_type;
80      typedef typename __ostream_type::ios_base    __ios_base;
81
82      typename __ostream_type::sentry __cerb(__out);
83      if (__cerb)
84	{
85	  __try
86	    {
87	      const streamsize __w = __out.width();
88	      if (__w > __n)
89		{
90		  const bool __left = ((__out.flags()
91					& __ios_base::adjustfield)
92				       == __ios_base::left);
93		  if (!__left)
94		    __ostream_fill(__out, __w - __n);
95		  if (__out.good())
96		    __ostream_write(__out, __s, __n);
97		  if (__left && __out.good())
98		    __ostream_fill(__out, __w - __n);
99		}
100	      else
101		__ostream_write(__out, __s, __n);
102	      __out.width(0);
103	    }
104	  __catch(__cxxabiv1::__forced_unwind&)
105	    {
106	      __out._M_setstate(__ios_base::badbit);
107	      __throw_exception_again;
108	    }
109	  __catch(...)
110	    { __out._M_setstate(__ios_base::badbit); }
111	}
112      return __out;
113    }
114
115  // Inhibit implicit instantiations for required instantiations,
116  // which are defined via explicit instantiations elsewhere.
117#if _GLIBCXX_EXTERN_TEMPLATE
118  extern template ostream& __ostream_insert(ostream&, const char*, streamsize);
119
120#ifdef _GLIBCXX_USE_WCHAR_T
121  extern template wostream& __ostream_insert(wostream&, const wchar_t*,
122					     streamsize);
123#endif
124#endif
125
126_GLIBCXX_END_NAMESPACE_VERSION
127} // namespace std
128
129#endif /* _OSTREAM_INSERT_H */
130