1// Backward-compat support -*- C++ -*-
2
3// Copyright (C) 2001-2015 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_warning.h"
51#include <iosfwd>
52#include <ios>
53#include <istream>
54#include <ostream>
55#include <string>
56
57namespace std _GLIBCXX_VISIBILITY(default)
58{
59_GLIBCXX_BEGIN_NAMESPACE_VERSION
60
61  // Class strstreambuf, a streambuf class that manages an array of char.
62  // Note that this class is not a template.
63  class strstreambuf : public basic_streambuf<char, char_traits<char> >
64  {
65  public:
66    // Types.
67    typedef char_traits<char>              _Traits;
68    typedef basic_streambuf<char, _Traits> _Base;
69
70  public:
71    // Constructor, destructor
72    explicit strstreambuf(streamsize __initial_capacity = 0);
73    strstreambuf(void* (*__alloc)(size_t), void (*__free)(void*));
74
75    strstreambuf(char* __get, streamsize __n, char* __put = 0) throw ();
76    strstreambuf(signed char* __get, streamsize __n, signed char* __put = 0) throw ();
77    strstreambuf(unsigned char* __get, streamsize __n, unsigned char* __put=0) throw ();
78
79    strstreambuf(const char* __get, streamsize __n) throw ();
80    strstreambuf(const signed char* __get, streamsize __n) throw ();
81    strstreambuf(const unsigned char* __get, streamsize __n) throw ();
82
83    virtual ~strstreambuf();
84
85  public:
86    void freeze(bool = true) throw ();
87    char* str() throw ();
88    _GLIBCXX_PURE int pcount() const throw ();
89
90  protected:
91    virtual int_type overflow(int_type __c  = _Traits::eof());
92    virtual int_type pbackfail(int_type __c = _Traits::eof());
93    virtual int_type underflow();
94    virtual _Base* setbuf(char* __buf, streamsize __n);
95    virtual pos_type seekoff(off_type __off, ios_base::seekdir __dir,
96			     ios_base::openmode __mode
97			     = ios_base::in | ios_base::out);
98    virtual pos_type seekpos(pos_type __pos, ios_base::openmode __mode
99			     = ios_base::in | ios_base::out);
100
101  private:
102    strstreambuf&
103    operator=(const strstreambuf&);
104
105    strstreambuf(const strstreambuf&);
106
107    // Dynamic allocation, possibly using _M_alloc_fun and _M_free_fun.
108    char* _M_alloc(size_t);
109    void  _M_free(char*);
110
111    // Helper function used in constructors.
112    void _M_setup(char* __get, char* __put, streamsize __n) throw ();
113
114  private:
115    // Data members.
116    void* (*_M_alloc_fun)(size_t);
117    void  (*_M_free_fun)(void*);
118
119    bool _M_dynamic  : 1;
120    bool _M_frozen   : 1;
121    bool _M_constant : 1;
122  };
123
124  // Class istrstream, an istream that manages a strstreambuf.
125  class istrstream : public basic_istream<char>
126  {
127  public:
128    explicit istrstream(char*);
129    explicit istrstream(const char*);
130    istrstream(char* , streamsize);
131    istrstream(const char*, streamsize);
132    virtual ~istrstream();
133
134    _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
135    char* str() throw ();
136
137  private:
138    strstreambuf _M_buf;
139  };
140
141  // Class ostrstream
142  class ostrstream : public basic_ostream<char>
143  {
144  public:
145    ostrstream();
146    ostrstream(char*, int, ios_base::openmode = ios_base::out);
147    virtual ~ostrstream();
148
149    _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
150    void freeze(bool = true) throw();
151    char* str() throw ();
152    _GLIBCXX_PURE int pcount() const throw ();
153
154  private:
155    strstreambuf _M_buf;
156  };
157
158  // Class strstream
159  class strstream : public basic_iostream<char>
160  {
161  public:
162    typedef char                        char_type;
163    typedef char_traits<char>::int_type int_type;
164    typedef char_traits<char>::pos_type pos_type;
165    typedef char_traits<char>::off_type off_type;
166
167    strstream();
168    strstream(char*, int, ios_base::openmode = ios_base::in | ios_base::out);
169    virtual ~strstream();
170
171    _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
172    void freeze(bool = true) throw ();
173    _GLIBCXX_PURE int pcount() const throw ();
174    char* str() throw ();
175
176  private:
177    strstreambuf _M_buf;
178  };
179
180_GLIBCXX_END_NAMESPACE_VERSION
181} // namespace
182
183#endif
184