1// Helpers for ostream inserters -*- C++ -*-
2
3// Copyright (C) 2007-2022 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
39namespace 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 */
131