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
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
// String based streams -*- C++ -*-
// Copyright (C) 1997, 1998, 1999, 2001, 2002, 2003
// 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 2, 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.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING. If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
// As a special exception, you may use this file as part of a free software
// library without restriction. Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License. This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
//
// ISO C++ 14882: 27.7 String-based streams
//
#ifndef _CPP_BITS_SSTREAM_TCC
#define _CPP_BITS_SSTREAM_TCC 1
#pragma GCC system_header
#include <sstream>
namespace std
{
template <class _CharT, class _Traits, class _Alloc>
typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_type
basic_stringbuf<_CharT, _Traits, _Alloc>::
pbackfail(int_type __c)
{
int_type __ret = traits_type::eof();
const bool __testeof = traits_type::eq_int_type(__c, __ret);
if (this->eback() < this->gptr())
{
const bool __testeq = traits_type::eq(traits_type::to_char_type(__c),
this->gptr()[-1]);
this->gbump(-1);
// Try to put back __c into input sequence in one of three ways.
// Order these tests done in is unspecified by the standard.
if (!__testeof && __testeq)
__ret = __c;
else if (__testeof)
__ret = traits_type::not_eof(__c);
else
{
*this->gptr() = traits_type::to_char_type(__c);
__ret = __c;
}
}
return __ret;
}
template <class _CharT, class _Traits, class _Alloc>
typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_type
basic_stringbuf<_CharT, _Traits, _Alloc>::
overflow(int_type __c)
{
const bool __testout = this->_M_mode & ios_base::out;
if (__builtin_expect(!__testout, false))
return traits_type::eof();
const bool __testeof = traits_type::eq_int_type(__c,
traits_type::eof());
if (__builtin_expect(__testeof, false))
return traits_type::not_eof(__c);
// NB: Start ostringstream buffers at 512 chars. This is an
// experimental value (pronounced "arbitrary" in some of the
// hipper english-speaking countries), and can be changed to
// suit particular needs.
const __size_type __len = std::max(__size_type(_M_string.capacity() + 1),
__size_type(512));
const bool __testput = this->pptr() < this->epptr();
if (__builtin_expect(!__testput && __len > _M_string.max_size(), false))
return traits_type::eof();
// Try to append __c into output sequence in one of two ways.
// Order these tests done in is unspecified by the standard.
if (!__testput)
{
// In virtue of DR 169 (TC) we are allowed to grow more than
// one char. That's easy to implement thanks to the exponential
// growth policy builtin into basic_string.
__string_type __tmp;
__tmp.reserve(__len);
__tmp.assign(_M_string.data(), this->epptr() - this->pbase());
_M_string.swap(__tmp);
_M_sync(const_cast<char_type*>(_M_string.data()),
this->gptr() - this->eback(),
this->pptr() - this->pbase());
}
return this->sputc(traits_type::to_char_type(__c));
}
template <class _CharT, class _Traits, class _Alloc>
typename basic_stringbuf<_CharT, _Traits, _Alloc>::int_type
basic_stringbuf<_CharT, _Traits, _Alloc>::
_M_underflow(bool __bump)
{
int_type __ret = traits_type::eof();
const bool __testin = this->_M_mode & ios_base::in;
if (__testin)
{
// Update egptr() to match the actual string end.
_M_update_egptr();
if (this->gptr() < this->egptr())
{
__ret = traits_type::to_int_type(*this->gptr());
if (__bump)
this->gbump(1);
}
}
return __ret;
}
template <class _CharT, class _Traits, class _Alloc>
typename basic_stringbuf<_CharT, _Traits, _Alloc>::pos_type
basic_stringbuf<_CharT, _Traits, _Alloc>::
seekoff(off_type __off, ios_base::seekdir __way, ios_base::openmode __mode)
{
pos_type __ret = pos_type(off_type(-1));
bool __testin = (ios_base::in & this->_M_mode & __mode) != 0;
bool __testout = (ios_base::out & this->_M_mode & __mode) != 0;
const bool __testboth = __testin && __testout && __way != ios_base::cur;
__testin &= !(__mode & ios_base::out);
__testout &= !(__mode & ios_base::in);
if (_M_string.capacity() && (__testin || __testout || __testboth))
{
char_type* __beg = __testin ? this->eback() : this->pbase();
_M_update_egptr();
off_type __newoffi = 0;
off_type __newoffo = 0;
if (__way == ios_base::cur)
{
__newoffi = this->gptr() - __beg;
__newoffo = this->pptr() - __beg;
}
else if (__way == ios_base::end)
__newoffo = __newoffi = this->egptr() - __beg;
if ((__testin || __testboth)
&& __newoffi + __off >= 0
&& this->egptr() - __beg >= __newoffi + __off)
{
this->gbump((__beg + __newoffi + __off) - this->gptr());
__ret = pos_type(__newoffi);
}
if ((__testout || __testboth)
&& __newoffo + __off >= 0
&& this->egptr() - __beg >= __newoffo + __off)
{
this->pbump((__beg + __newoffo + __off) - this->pptr());
__ret = pos_type(__newoffo);
}
}
return __ret;
}
template <class _CharT, class _Traits, class _Alloc>
typename basic_stringbuf<_CharT, _Traits, _Alloc>::pos_type
basic_stringbuf<_CharT, _Traits, _Alloc>::
seekpos(pos_type __sp, ios_base::openmode __mode)
{
pos_type __ret = pos_type(off_type(-1));
if (_M_string.capacity())
{
off_type __pos = __sp; // Use streamoff operator to do conversion.
const bool __testin = (ios_base::in & this->_M_mode & __mode) != 0;
const bool __testout = (ios_base::out & this->_M_mode & __mode) != 0;
char_type* __beg = __testin ? this->eback() : this->pbase();
_M_update_egptr();
const bool __testpos = 0 <= __pos
&& __pos <= this->egptr() - __beg;
if ((__testin || __testout) && __testpos)
{
if (__testin)
this->gbump((__beg + __pos) - this->gptr());
if (__testout)
this->pbump((__beg + __pos) - this->pptr());
__ret = pos_type(off_type(__pos));
}
}
return __ret;
}
// Inhibit implicit instantiations for required instantiations,
// which are defined via explicit instantiations elsewhere.
// NB: This syntax is a GNU extension.
extern template class basic_stringbuf<char>;
extern template class basic_istringstream<char>;
extern template class basic_ostringstream<char>;
extern template class basic_stringstream<char>;
#ifdef _GLIBCPP_USE_WCHAR_T
extern template class basic_stringbuf<wchar_t>;
extern template class basic_istringstream<wchar_t>;
extern template class basic_ostringstream<wchar_t>;
extern template class basic_stringstream<wchar_t>;
#endif
} // namespace std
#endif
|
