1// Backward-compat support -*- C++ -*-
2
3// Copyright (C) 2001-2021 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/*
26 * Copyright (c) 1998
27 * Silicon Graphics Computer Systems, Inc.
28 *
29 * Permission to use, copy, modify, distribute and sell this software
30 * and its documentation for any purpose is hereby granted without fee,
31 * provided that the above copyright notice appear in all copies and
32 * that both that copyright notice and this permission notice appear
33 * in supporting documentation. Silicon Graphics makes no
34 * representations about the suitability of this software for any
35 * purpose. It is provided "as is" without express or implied warranty.
36 */
37
38// WARNING: The classes defined in this header are DEPRECATED. This
39// header is defined in section D.7.1 of the C++ standard, and it
40// MAY BE REMOVED in a future standard revision. One should use the
41// header <sstream> instead.
42
43/** @file strstream
44 * This is a Standard C++ Library header.
45 */
46
47#ifndef _BACKWARD_STRSTREAM
48#define _BACKWARD_STRSTREAM
49
50#include <backward/backward_warning.h>
51#include <iosfwd>
52#include <ios>
53#include <istream>
54#include <ostream>
55
56namespace std _GLIBCXX_VISIBILITY(default)
57{
58_GLIBCXX_BEGIN_NAMESPACE_VERSION
59
60 // Class strstreambuf, a streambuf class that manages an array of char.
61 // Note that this class is not a template.
62 class strstreambuf : public basic_streambuf<char, char_traits<char> >
63 {
64 public:
65 // Types.
66 typedef char_traits<char> _Traits;
67 typedef basic_streambuf<char, _Traits> _Base;
68
69 public:
70 // Constructor, destructor
71#if __cplusplus >= 201103L
72 strstreambuf() : strstreambuf(0) { }
73 explicit strstreambuf(streamsize __initial_capacity);
74#else
75 explicit strstreambuf(streamsize __initial_capacity = 0);
76#endif
77 strstreambuf(void* (*__alloc)(size_t), void (*__free)(void*));
78
79 strstreambuf(char* __get, streamsize __n, char* __put = 0) throw ();
80 strstreambuf(signed char* __get, streamsize __n, signed char* __put = 0) throw ();
81 strstreambuf(unsigned char* __get, streamsize __n, unsigned char* __put=0) throw ();
82
83 strstreambuf(const char* __get, streamsize __n) throw ();
84 strstreambuf(const signed char* __get, streamsize __n) throw ();
85 strstreambuf(const unsigned char* __get, streamsize __n) throw ();
86
87 virtual ~strstreambuf();
88
89#if __cplusplus >= 201103L
90 strstreambuf(strstreambuf&& __rhs) noexcept
91 : _Base(__rhs), _M_alloc_fun(__rhs._M_alloc_fun),
92 _M_free_fun(__rhs._M_free_fun), _M_dynamic(__rhs._M_dynamic),
93 _M_frozen(__rhs._M_frozen), _M_constant(__rhs._M_constant)
94 {
95 __rhs.setg(gbeg: nullptr, gnext: nullptr, gend: nullptr);
96 __rhs.setp(pbeg: nullptr, pend: nullptr);
97 }
98
99 strstreambuf&
100 operator=(strstreambuf&& __rhs) noexcept
101 {
102 if (_M_dynamic && !_M_frozen)
103 _M_free(eback());
104 _Base::operator=(static_cast<const _Base&>(__rhs));
105 _M_alloc_fun = __rhs._M_alloc_fun;
106 _M_free_fun = __rhs._M_free_fun;
107 _M_dynamic = __rhs._M_dynamic;
108 _M_frozen = __rhs._M_frozen;
109 _M_constant = __rhs._M_constant;
110 __rhs.setg(gbeg: nullptr, gnext: nullptr, gend: nullptr);
111 __rhs.setp(pbeg: nullptr, pend: nullptr);
112 return *this;
113 }
114#endif
115
116 public:
117 void freeze(bool = true) throw ();
118 char* str() throw ();
119 _GLIBCXX_PURE int pcount() const throw ();
120
121 protected:
122 virtual int_type overflow(int_type __c = _Traits::eof());
123 virtual int_type pbackfail(int_type __c = _Traits::eof());
124 virtual int_type underflow();
125 virtual _Base* setbuf(char* __buf, streamsize __n);
126 virtual pos_type seekoff(off_type __off, ios_base::seekdir __dir,
127 ios_base::openmode __mode
128 = ios_base::in | ios_base::out);
129 virtual pos_type seekpos(pos_type __pos, ios_base::openmode __mode
130 = ios_base::in | ios_base::out);
131
132 private:
133#if __cplusplus < 201103L
134 strstreambuf&
135 operator=(const strstreambuf&);
136
137 strstreambuf(const strstreambuf&);
138#endif
139
140 // Dynamic allocation, possibly using _M_alloc_fun and _M_free_fun.
141 char* _M_alloc(size_t);
142 void _M_free(char*);
143
144 // Helper function used in constructors.
145 void _M_setup(char* __get, char* __put, streamsize __n) throw ();
146
147 // Data members.
148 void* (*_M_alloc_fun)(size_t);
149 void (*_M_free_fun)(void*);
150
151 bool _M_dynamic : 1;
152 bool _M_frozen : 1;
153 bool _M_constant : 1;
154 };
155
156 // Class istrstream, an istream that manages a strstreambuf.
157 class istrstream : public basic_istream<char>
158 {
159 public:
160 explicit istrstream(char*);
161 explicit istrstream(const char*);
162 istrstream(char* , streamsize);
163 istrstream(const char*, streamsize);
164 virtual ~istrstream();
165
166#if __cplusplus >= 201103L
167 istrstream(istrstream&& __rhs)
168 : istream(std::move(__rhs)), _M_buf(std::move(__rhs._M_buf))
169 { set_rdbuf(&_M_buf); }
170
171 istrstream& operator=(istrstream&&) = default;
172#endif
173
174 _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
175 char* str() throw ();
176
177 private:
178 strstreambuf _M_buf;
179 };
180
181 // Class ostrstream
182 class ostrstream : public basic_ostream<char>
183 {
184 public:
185 ostrstream();
186 ostrstream(char*, int, ios_base::openmode = ios_base::out);
187 virtual ~ostrstream();
188
189#if __cplusplus >= 201103L
190 ostrstream(ostrstream&& __rhs)
191 : ostream(std::move(__rhs)), _M_buf(std::move(__rhs._M_buf))
192 { set_rdbuf(&_M_buf); }
193
194 ostrstream& operator=(ostrstream&&) = default;
195#endif
196
197 _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
198 void freeze(bool = true) throw();
199 char* str() throw ();
200 _GLIBCXX_PURE int pcount() const throw ();
201
202 private:
203 strstreambuf _M_buf;
204 };
205
206 // Class strstream
207 class strstream : public basic_iostream<char>
208 {
209 public:
210 typedef char char_type;
211 typedef char_traits<char>::int_type int_type;
212 typedef char_traits<char>::pos_type pos_type;
213 typedef char_traits<char>::off_type off_type;
214
215 strstream();
216 strstream(char*, int, ios_base::openmode = ios_base::in | ios_base::out);
217 virtual ~strstream();
218
219#if __cplusplus >= 201103L
220 strstream(strstream&& __rhs)
221 : iostream(std::move(__rhs)), _M_buf(std::move(__rhs._M_buf))
222 { set_rdbuf(&_M_buf); }
223
224 strstream& operator=(strstream&&) = default;
225#endif
226
227 _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
228 void freeze(bool = true) throw ();
229 _GLIBCXX_PURE int pcount() const throw ();
230 char* str() throw ();
231
232 private:
233 strstreambuf _M_buf;
234 };
235
236_GLIBCXX_END_NAMESPACE_VERSION
237} // namespace
238
239#endif
240

source code of include/c++/11/backward/strstream