1// Helpers for ostream inserters -*- C++ -*- 
2 
3// Copyright (C) 2007-2019 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