1// Backward-compat support -*- C++ -*-
2
3// Copyright (C) 2001-2020 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(nullptr, nullptr, nullptr);
96      __rhs.setp(nullptr, 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(nullptr, nullptr, nullptr);
111      __rhs.setp(nullptr, 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