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 */ |
131 | |