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1 | // Helpers for ostream inserters -*- C++ -*- |
2 | ||
bc2631e0 | 3 | // Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc. |
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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 2, 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 | // You should have received a copy of the GNU General Public License along | |
17 | // with this library; see the file COPYING. If not, write to the Free | |
18 | // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, | |
19 | // USA. | |
20 | ||
21 | // As a special exception, you may use this file as part of a free software | |
22 | // library without restriction. Specifically, if other files instantiate | |
23 | // templates or use macros or inline functions from this file, or you compile | |
24 | // this file and link it with other files to produce an executable, this | |
25 | // file does not by itself cause the resulting executable to be covered by | |
26 | // the GNU General Public License. This exception does not however | |
27 | // invalidate any other reasons why the executable file might be covered by | |
28 | // the GNU General Public License. | |
29 | ||
30 | /** @file ostream_insert.h | |
31 | * This is an internal header file, included by other library headers. | |
32 | * You should not attempt to use it directly. | |
33 | */ | |
34 | ||
35 | #ifndef _OSTREAM_INSERT_H | |
36 | #define _OSTREAM_INSERT_H 1 | |
37 | ||
38 | #pragma GCC system_header | |
39 | ||
40 | #include <iosfwd> | |
fba10f59 | 41 | #include <cxxabi-forced.h> |
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42 | |
43 | _GLIBCXX_BEGIN_NAMESPACE(std) | |
44 | ||
45 | template<typename _CharT, typename _Traits> | |
46 | inline void | |
47 | __ostream_write(basic_ostream<_CharT, _Traits>& __out, | |
48 | const _CharT* __s, streamsize __n) | |
49 | { | |
50 | typedef basic_ostream<_CharT, _Traits> __ostream_type; | |
51 | typedef typename __ostream_type::ios_base __ios_base; | |
52 | ||
53 | const streamsize __put = __out.rdbuf()->sputn(__s, __n); | |
54 | if (__put != __n) | |
55 | __out.setstate(__ios_base::badbit); | |
56 | } | |
57 | ||
58 | template<typename _CharT, typename _Traits> | |
59 | inline void | |
60 | __ostream_fill(basic_ostream<_CharT, _Traits>& __out, streamsize __n) | |
61 | { | |
62 | typedef basic_ostream<_CharT, _Traits> __ostream_type; | |
63 | typedef typename __ostream_type::ios_base __ios_base; | |
64 | ||
65 | const _CharT __c = __out.fill(); | |
66 | for (; __n > 0; --__n) | |
67 | { | |
68 | const typename _Traits::int_type __put = __out.rdbuf()->sputc(__c); | |
69 | if (_Traits::eq_int_type(__put, _Traits::eof())) | |
70 | { | |
71 | __out.setstate(__ios_base::badbit); | |
72 | break; | |
73 | } | |
74 | } | |
75 | } | |
76 | ||
77 | template<typename _CharT, typename _Traits> | |
78 | basic_ostream<_CharT, _Traits>& | |
79 | __ostream_insert(basic_ostream<_CharT, _Traits>& __out, | |
80 | const _CharT* __s, streamsize __n) | |
81 | { | |
82 | typedef basic_ostream<_CharT, _Traits> __ostream_type; | |
83 | typedef typename __ostream_type::ios_base __ios_base; | |
84 | ||
85 | typename __ostream_type::sentry __cerb(__out); | |
86 | if (__cerb) | |
87 | { | |
bc2631e0 | 88 | __try |
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89 | { |
90 | const streamsize __w = __out.width(); | |
91 | if (__w > __n) | |
92 | { | |
93 | const bool __left = ((__out.flags() | |
94 | & __ios_base::adjustfield) | |
95 | == __ios_base::left); | |
96 | if (!__left) | |
97 | __ostream_fill(__out, __w - __n); | |
98 | if (__out.good()) | |
99 | __ostream_write(__out, __s, __n); | |
100 | if (__left && __out.good()) | |
101 | __ostream_fill(__out, __w - __n); | |
102 | } | |
103 | else | |
104 | __ostream_write(__out, __s, __n); | |
105 | __out.width(0); | |
106 | } | |
bc2631e0 | 107 | __catch(__cxxabiv1::__forced_unwind&) |
d05f74f1 JM |
108 | { |
109 | __out._M_setstate(__ios_base::badbit); | |
110 | __throw_exception_again; | |
111 | } | |
bc2631e0 | 112 | __catch(...) |
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113 | { __out._M_setstate(__ios_base::badbit); } |
114 | } | |
115 | return __out; | |
116 | } | |
117 | ||
84b31797 PC |
118 | // Inhibit implicit instantiations for required instantiations, |
119 | // which are defined via explicit instantiations elsewhere. | |
120 | // NB: This syntax is a GNU extension. | |
121 | #if _GLIBCXX_EXTERN_TEMPLATE | |
122 | extern template ostream& __ostream_insert(ostream&, const char*, streamsize); | |
123 | ||
124 | #ifdef _GLIBCXX_USE_WCHAR_T | |
125 | extern template wostream& __ostream_insert(wostream&, const wchar_t*, | |
126 | streamsize); | |
127 | #endif | |
128 | #endif | |
129 | ||
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130 | _GLIBCXX_END_NAMESPACE |
131 | ||
132 | #endif /* _OSTREAM_INSERT_H */ |