libstdc++
strstream
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1 // Backward-compat support -*- C++ -*-
2 
3 // Copyright (C) 2001-2018 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 
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  explicit strstreambuf(streamsize __initial_capacity = 0);
72  strstreambuf(void* (*__alloc)(size_t), void (*__free)(void*));
73 
74  strstreambuf(char* __get, streamsize __n, char* __put = 0) throw ();
75  strstreambuf(signed char* __get, streamsize __n, signed char* __put = 0) throw ();
76  strstreambuf(unsigned char* __get, streamsize __n, unsigned char* __put=0) throw ();
77 
78  strstreambuf(const char* __get, streamsize __n) throw ();
79  strstreambuf(const signed char* __get, streamsize __n) throw ();
80  strstreambuf(const unsigned char* __get, streamsize __n) throw ();
81 
82  virtual ~strstreambuf();
83 
84  public:
85  void freeze(bool = true) throw ();
86  char* str() throw ();
87  _GLIBCXX_PURE int pcount() const throw ();
88 
89  protected:
90  virtual int_type overflow(int_type __c = _Traits::eof());
91  virtual int_type pbackfail(int_type __c = _Traits::eof());
92  virtual int_type underflow();
93  virtual _Base* setbuf(char* __buf, streamsize __n);
94  virtual pos_type seekoff(off_type __off, ios_base::seekdir __dir,
95  ios_base::openmode __mode
96  = ios_base::in | ios_base::out);
97  virtual pos_type seekpos(pos_type __pos, ios_base::openmode __mode
98  = ios_base::in | ios_base::out);
99 
100  private:
101  strstreambuf&
102  operator=(const strstreambuf&);
103 
104  strstreambuf(const strstreambuf&);
105 
106  // Dynamic allocation, possibly using _M_alloc_fun and _M_free_fun.
107  char* _M_alloc(size_t);
108  void _M_free(char*);
109 
110  // Helper function used in constructors.
111  void _M_setup(char* __get, char* __put, streamsize __n) throw ();
112 
113  private:
114  // Data members.
115  void* (*_M_alloc_fun)(size_t);
116  void (*_M_free_fun)(void*);
117 
118  bool _M_dynamic : 1;
119  bool _M_frozen : 1;
120  bool _M_constant : 1;
121  };
122 
123  // Class istrstream, an istream that manages a strstreambuf.
124  class istrstream : public basic_istream<char>
125  {
126  public:
127  explicit istrstream(char*);
128  explicit istrstream(const char*);
129  istrstream(char* , streamsize);
130  istrstream(const char*, streamsize);
131  virtual ~istrstream();
132 
133  _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
134  char* str() throw ();
135 
136  private:
137  strstreambuf _M_buf;
138  };
139 
140  // Class ostrstream
141  class ostrstream : public basic_ostream<char>
142  {
143  public:
144  ostrstream();
145  ostrstream(char*, int, ios_base::openmode = ios_base::out);
146  virtual ~ostrstream();
147 
148  _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
149  void freeze(bool = true) throw();
150  char* str() throw ();
151  _GLIBCXX_PURE int pcount() const throw ();
152 
153  private:
154  strstreambuf _M_buf;
155  };
156 
157  // Class strstream
158  class strstream : public basic_iostream<char>
159  {
160  public:
161  typedef char char_type;
162  typedef char_traits<char>::int_type int_type;
163  typedef char_traits<char>::pos_type pos_type;
164  typedef char_traits<char>::off_type off_type;
165 
166  strstream();
167  strstream(char*, int, ios_base::openmode = ios_base::in | ios_base::out);
168  virtual ~strstream();
169 
170  _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
171  void freeze(bool = true) throw ();
172  _GLIBCXX_PURE int pcount() const throw ();
173  char* str() throw ();
174 
175  private:
176  strstreambuf _M_buf;
177  };
178 
179 _GLIBCXX_END_NAMESPACE_VERSION
180 } // namespace
181 
182 #endif