11.2.0/backward/strstream

// Backward-compat support -*- C++ -*-

// Copyright (C) 2001-2021 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/>.

/*
 * Copyright (c) 1998
 * Silicon Graphics Computer Systems, Inc.
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Silicon Graphics makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 */

// WARNING: The classes defined in this header are DEPRECATED.  This
// header is defined in section D.7.1 of the C++ standard, and it
// MAY BE REMOVED in a future standard revision.  One should use the
// header <sstream> instead.

/** @file strstream
 *  This is a Standard C++ Library header.
 */

#ifndef _BACKWARD_STRSTREAM
#define _BACKWARD_STRSTREAM

#include <backward/backward_warning.h>
#include <iosfwd>
#include <ios>
#include <istream>
#include <ostream>

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

  // Class strstreambuf, a streambuf class that manages an array of char.
  // Note that this class is not a template.
  class strstreambuf : public basic_streambuf<char, char_traits<char> >
  {
  public:
    // Types.
    typedef char_traits<char>              _Traits;
    typedef basic_streambuf<char, _Traits> _Base;

  public:
    // Constructor, destructor
#if __cplusplus >= 201103L
    strstreambuf() : strstreambuf(0) { }
    explicit strstreambuf(streamsize __initial_capacity);
#else
    explicit strstreambuf(streamsize __initial_capacity = 0);
#endif
    strstreambuf(void* (*__alloc)(size_t), void (*__free)(void*));

    strstreambuf(char* __get, streamsize __n, char* __put = 0) throw ();
    strstreambuf(signed char* __get, streamsize __n, signed char* __put = 0) throw ();
    strstreambuf(unsigned char* __get, streamsize __n, unsigned char* __put=0) throw ();

    strstreambuf(const char* __get, streamsize __n) throw ();
    strstreambuf(const signed char* __get, streamsize __n) throw ();
    strstreambuf(const unsigned char* __get, streamsize __n) throw ();

    virtual ~strstreambuf();

#if __cplusplus >= 201103L
    strstreambuf(strstreambuf&& __rhs) noexcept
    : _Base(__rhs), _M_alloc_fun(__rhs._M_alloc_fun),
      _M_free_fun(__rhs._M_free_fun), _M_dynamic(__rhs._M_dynamic),
      _M_frozen(__rhs._M_frozen), _M_constant(__rhs._M_constant)
    {
      __rhs.setg(nullptr, nullptr, nullptr);
      __rhs.setp(nullptr, nullptr);
    }

    strstreambuf&
    operator=(strstreambuf&& __rhs) noexcept
    {
      if (_M_dynamic && !_M_frozen)
        _M_free(eback());
      _Base::operator=(static_cast<const _Base&>(__rhs));
      _M_alloc_fun = __rhs._M_alloc_fun;
      _M_free_fun = __rhs._M_free_fun;
      _M_dynamic = __rhs._M_dynamic;
      _M_frozen = __rhs._M_frozen;
      _M_constant = __rhs._M_constant;
      __rhs.setg(nullptr, nullptr, nullptr);
      __rhs.setp(nullptr, nullptr);
      return *this;
    }
#endif

  public:
    void freeze(bool = true) throw ();
    char* str() throw ();
    _GLIBCXX_PURE int pcount() const throw ();

  protected:
    virtual int_type overflow(int_type __c  = _Traits::eof());
    virtual int_type pbackfail(int_type __c = _Traits::eof());
    virtual int_type underflow();
    virtual _Base* setbuf(char* __buf, streamsize __n);
    virtual pos_type seekoff(off_type __off, ios_base::seekdir __dir,
                             ios_base::openmode __mode
                             = ios_base::in | ios_base::out);
    virtual pos_type seekpos(pos_type __pos, ios_base::openmode __mode
                             = ios_base::in | ios_base::out);

  private:
#if __cplusplus < 201103L
    strstreambuf&
    operator=(const strstreambuf&);

    strstreambuf(const strstreambuf&);
#endif

    // Dynamic allocation, possibly using _M_alloc_fun and _M_free_fun.
    char* _M_alloc(size_t);
    void  _M_free(char*);

    // Helper function used in constructors.
    void _M_setup(char* __get, char* __put, streamsize __n) throw ();

    // Data members.
    void* (*_M_alloc_fun)(size_t);
    void  (*_M_free_fun)(void*);

    bool _M_dynamic  : 1;
    bool _M_frozen   : 1;
    bool _M_constant : 1;
  };

  // Class istrstream, an istream that manages a strstreambuf.
  class istrstream : public basic_istream<char>
  {
  public:
    explicit istrstream(char*);
    explicit istrstream(const char*);
    istrstream(char* , streamsize);
    istrstream(const char*, streamsize);
    virtual ~istrstream();

#if __cplusplus >= 201103L
    istrstream(istrstream&& __rhs)
    : istream(std::move(__rhs)), _M_buf(std::move(__rhs._M_buf))
    { set_rdbuf(&_M_buf); }

    istrstream& operator=(istrstream&&) = default;
#endif

    _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
    char* str() throw ();

  private:
    strstreambuf _M_buf;
  };

  // Class ostrstream
  class ostrstream : public basic_ostream<char>
  {
  public:
    ostrstream();
    ostrstream(char*, int, ios_base::openmode = ios_base::out);
    virtual ~ostrstream();

#if __cplusplus >= 201103L
    ostrstream(ostrstream&& __rhs)
    : ostream(std::move(__rhs)), _M_buf(std::move(__rhs._M_buf))
    { set_rdbuf(&_M_buf); }

    ostrstream& operator=(ostrstream&&) = default;
#endif

    _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
    void freeze(bool = true) throw();
    char* str() throw ();
    _GLIBCXX_PURE int pcount() const throw ();

  private:
    strstreambuf _M_buf;
  };

  // Class strstream
  class strstream : public basic_iostream<char>
  {
  public:
    typedef char                        char_type;
    typedef char_traits<char>::int_type int_type;
    typedef char_traits<char>::pos_type pos_type;
    typedef char_traits<char>::off_type off_type;

    strstream();
    strstream(char*, int, ios_base::openmode = ios_base::in | ios_base::out);
    virtual ~strstream();

#if __cplusplus >= 201103L
    strstream(strstream&& __rhs)
    : iostream(std::move(__rhs)), _M_buf(std::move(__rhs._M_buf))
    { set_rdbuf(&_M_buf); }

    strstream& operator=(strstream&&) = default;
#endif

    _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
    void freeze(bool = true) throw ();
    _GLIBCXX_PURE int pcount() const throw ();
    char* str() throw ();

  private:
    strstreambuf _M_buf;
  };

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace

#endif
Revision:	1166
Committed:	Tue Oct 26 14:22:36 2021 UTC (4 years ago) by rossy
File size:	7454 byte(s)
Log Message:	Daodan: Replace MinGW build env with an up-to-date MSYS2 env
#	Content
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
56	namespace 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