1// Backward-compat support -*- C++ -*-
2
3// Copyright (C) 2001, 2002, 2004, 2005, 2009, 2010, 2011
4// Free Software Foundation, Inc.
5//
6// This file is part of the GNU ISO C++ Library.  This library is free
7// software; you can redistribute it and/or modify it under the
8// terms of the GNU General Public License as published by the
9// Free Software Foundation; either version 3, or (at your option)
10// any later version.
11
12// This library is distributed in the hope that it will be useful,
13// but WITHOUT ANY WARRANTY; without even the implied warranty of
14// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15// GNU General Public License for more details.
16
17// Under Section 7 of GPL version 3, you are granted additional
18// permissions described in the GCC Runtime Library Exception, version
19// 3.1, as published by the Free Software Foundation.
20
21// You should have received a copy of the GNU General Public License and
22// a copy of the GCC Runtime Library Exception along with this program;
23// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
24// <http://www.gnu.org/licenses/>.
25
26/*
27 * Copyright (c) 1998
28 * Silicon Graphics Computer Systems, Inc.
29 *
30 * Permission to use, copy, modify, distribute and sell this software
31 * and its documentation for any purpose is hereby granted without fee,
32 * provided that the above copyright notice appear in all copies and
33 * that both that copyright notice and this permission notice appear
34 * in supporting documentation.  Silicon Graphics makes no
35 * representations about the suitability of this software for any
36 * purpose.  It is provided "as is" without express or implied warranty.
37 */
38
39// WARNING: The classes defined in this header are DEPRECATED.  This
40// header is defined in section D.7.1 of the C++ standard, and it
41// MAY BE REMOVED in a future standard revision.  One should use the
42// header <sstream> instead.
43
44/** @file backward/strstream
45 *  This is an internal header file, included by other library headers.
46 *  Do not attempt to use it directly. @headername{sstream}
47 */
48
49#ifndef _BACKWARD_STRSTREAM
50#define _BACKWARD_STRSTREAM
51
52#include "backward_warning.h"
53#include <iosfwd>
54#include <ios>
55#include <istream>
56#include <ostream>
57#include <string>
58
59namespace std _GLIBCXX_VISIBILITY(default)
60{
61_GLIBCXX_BEGIN_NAMESPACE_VERSION
62
63  // Class strstreambuf, a streambuf class that manages an array of char.
64  // Note that this class is not a template.
65  class strstreambuf : public basic_streambuf<char, char_traits<char> >
66  {
67  public:
68    // Types.
69    typedef char_traits<char>              _Traits;
70    typedef basic_streambuf<char, _Traits> _Base;
71
72  public:
73    // Constructor, destructor
74    explicit strstreambuf(streamsize __initial_capacity = 0);
75    strstreambuf(void* (*__alloc)(size_t), void (*__free)(void*));
76
77    strstreambuf(char* __get, streamsize __n, char* __put = 0) throw ();
78    strstreambuf(signed char* __get, streamsize __n, signed char* __put = 0) throw ();
79    strstreambuf(unsigned char* __get, streamsize __n, unsigned char* __put=0) throw ();
80
81    strstreambuf(const char* __get, streamsize __n) throw ();
82    strstreambuf(const signed char* __get, streamsize __n) throw ();
83    strstreambuf(const unsigned char* __get, streamsize __n) throw ();
84
85    virtual ~strstreambuf();
86
87  public:
88    void freeze(bool = true) throw ();
89    char* str() throw ();
90    _GLIBCXX_PURE int pcount() const throw ();
91
92  protected:
93    virtual int_type overflow(int_type __c  = _Traits::eof());
94    virtual int_type pbackfail(int_type __c = _Traits::eof());
95    virtual int_type underflow();
96    virtual _Base* setbuf(char* __buf, streamsize __n);
97    virtual pos_type seekoff(off_type __off, ios_base::seekdir __dir,
98			     ios_base::openmode __mode
99			     = ios_base::in | ios_base::out);
100    virtual pos_type seekpos(pos_type __pos, ios_base::openmode __mode
101			     = ios_base::in | ios_base::out);
102
103  private:
104    strstreambuf&
105    operator=(const strstreambuf&);
106
107    strstreambuf(const strstreambuf&);
108
109    // Dynamic allocation, possibly using _M_alloc_fun and _M_free_fun.
110    char* _M_alloc(size_t);
111    void  _M_free(char*);
112
113    // Helper function used in constructors.
114    void _M_setup(char* __get, char* __put, streamsize __n) throw ();
115
116  private:
117    // Data members.
118    void* (*_M_alloc_fun)(size_t);
119    void  (*_M_free_fun)(void*);
120
121    bool _M_dynamic  : 1;
122    bool _M_frozen   : 1;
123    bool _M_constant : 1;
124  };
125
126  // Class istrstream, an istream that manages a strstreambuf.
127  class istrstream : public basic_istream<char>
128  {
129  public:
130    explicit istrstream(char*);
131    explicit istrstream(const char*);
132    istrstream(char* , streamsize);
133    istrstream(const char*, streamsize);
134    virtual ~istrstream();
135
136    _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
137    char* str() throw ();
138
139  private:
140    strstreambuf _M_buf;
141  };
142
143  // Class ostrstream
144  class ostrstream : public basic_ostream<char>
145  {
146  public:
147    ostrstream();
148    ostrstream(char*, int, ios_base::openmode = ios_base::out);
149    virtual ~ostrstream();
150
151    _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
152    void freeze(bool = true) throw();
153    char* str() throw ();
154    _GLIBCXX_PURE int pcount() const throw ();
155
156  private:
157    strstreambuf _M_buf;
158  };
159
160  // Class strstream
161  class strstream : public basic_iostream<char>
162  {
163  public:
164    typedef char                        char_type;
165    typedef char_traits<char>::int_type int_type;
166    typedef char_traits<char>::pos_type pos_type;
167    typedef char_traits<char>::off_type off_type;
168
169    strstream();
170    strstream(char*, int, ios_base::openmode = ios_base::in | ios_base::out);
171    virtual ~strstream();
172
173    _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
174    void freeze(bool = true) throw ();
175    _GLIBCXX_PURE int pcount() const throw ();
176    char* str() throw ();
177
178  private:
179    strstreambuf _M_buf;
180  };
181
182_GLIBCXX_END_NAMESPACE_VERSION
183} // namespace
184
185#endif
186