1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
// Stream buffer classes -*- C++ -*-
// Copyright (C) 1997-2022 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
/** @file bits/streambuf.tcc
* This is an internal header file, included by other library headers.
* Do not attempt to use it directly. @headername{streambuf}
*/
//
// ISO C++ 14882: 27.5 Stream buffers
//
#ifndef _STREAMBUF_TCC
#define _STREAMBUF_TCC 1
#pragma GCC system_header
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _CharT, typename _Traits>
streamsize
basic_streambuf<_CharT, _Traits>::
xsgetn(char_type* __s, streamsize __n)
{
streamsize __ret = 0;
while (__ret < __n)
{
const streamsize __buf_len = this->egptr() - this->gptr();
if (__buf_len)
{
const streamsize __remaining = __n - __ret;
const streamsize __len = std::min(__buf_len, __remaining);
traits_type::copy(__s, this->gptr(), __len);
__ret += __len;
__s += __len;
this->__safe_gbump(__len);
}
if (__ret < __n)
{
const int_type __c = this->uflow();
if (!traits_type::eq_int_type(__c, traits_type::eof()))
{
traits_type::assign(*__s++, traits_type::to_char_type(__c));
++__ret;
}
else
break;
}
}
return __ret;
}
template<typename _CharT, typename _Traits>
streamsize
basic_streambuf<_CharT, _Traits>::
xsputn(const char_type* __s, streamsize __n)
{
streamsize __ret = 0;
while (__ret < __n)
{
const streamsize __buf_len = this->epptr() - this->pptr();
if (__buf_len)
{
const streamsize __remaining = __n - __ret;
const streamsize __len = std::min(__buf_len, __remaining);
traits_type::copy(this->pptr(), __s, __len);
__ret += __len;
__s += __len;
this->__safe_pbump(__len);
}
if (__ret < __n)
{
int_type __c = this->overflow(traits_type::to_int_type(*__s));
if (!traits_type::eq_int_type(__c, traits_type::eof()))
{
++__ret;
++__s;
}
else
break;
}
}
return __ret;
}
// Conceivably, this could be used to implement buffer-to-buffer
// copies, if this was ever desired in an un-ambiguous way by the
// standard.
template<typename _CharT, typename _Traits>
streamsize
__copy_streambufs_eof(basic_streambuf<_CharT, _Traits>* __sbin,
basic_streambuf<_CharT, _Traits>* __sbout,
bool& __ineof)
{
streamsize __ret = 0;
__ineof = true;
typename _Traits::int_type __c = __sbin->sgetc();
while (!_Traits::eq_int_type(__c, _Traits::eof()))
{
__c = __sbout->sputc(_Traits::to_char_type(__c));
if (_Traits::eq_int_type(__c, _Traits::eof()))
{
__ineof = false;
break;
}
++__ret;
__c = __sbin->snextc();
}
return __ret;
}
template<typename _CharT, typename _Traits>
inline streamsize
__copy_streambufs(basic_streambuf<_CharT, _Traits>* __sbin,
basic_streambuf<_CharT, _Traits>* __sbout)
{
bool __ineof;
return __copy_streambufs_eof(__sbin, __sbout, __ineof);
}
// Inhibit implicit instantiations for required instantiations,
// which are defined via explicit instantiations elsewhere.
#if _GLIBCXX_EXTERN_TEMPLATE
extern template class basic_streambuf<char>;
extern template
streamsize
__copy_streambufs(basic_streambuf<char>*,
basic_streambuf<char>*);
#ifdef _GLIBCXX_USE_WCHAR_T
extern template class basic_streambuf<wchar_t>;
extern template
streamsize
__copy_streambufs(basic_streambuf<wchar_t>*,
basic_streambuf<wchar_t>*);
#endif
#endif
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif
|
