strstream revision 97403 
1// Backward-compat support -*- C++ -*-
2
3// Copyright (C) 2001 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 2, 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// You should have received a copy of the GNU General Public License along
17// with this library; see the file COPYING.  If not, write to the Free
18// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
19// USA.
20
21// As a special exception, you may use this file as part of a free software
22// library without restriction.  Specifically, if other files instantiate
23// templates or use macros or inline functions from this file, or you compile
24// this file and link it with other files to produce an executable, this
25// file does not by itself cause the resulting executable to be covered by
26// the GNU General Public License.  This exception does not however
27// invalidate any other reasons why the executable file might be covered by
28// the GNU General Public License.
29
30/*
31 * Copyright (c) 1998
32 * Silicon Graphics Computer Systems, Inc.
33 *
34 * Permission to use, copy, modify, distribute and sell this software
35 * and its documentation for any purpose is hereby granted without fee,
36 * provided that the above copyright notice appear in all copies and
37 * that both that copyright notice and this permission notice appear
38 * in supporting documentation.  Silicon Graphics makes no
39 * representations about the suitability of this software for any
40 * purpose.  It is provided "as is" without express or implied warranty.
41 */
42
43// WARNING: The classes defined in this header are DEPRECATED.  This
44// header is defined in section D.7.1 of the C++ standard, and it
45// MAY BE REMOVED in a future standard revision.  You should use the
46// header <sstream> instead.
47
48#ifndef __SGI_STL_STRSTREAM
49#define __SGI_STL_STRSTREAM
50
51#include "backward_warning.h"
52#include <iosfwd>
53#include <ios>
54#include <istream>
55#include <ostream>
56#include <string>
57
58namespace std
59{
60
61//----------------------------------------------------------------------
62// Class strstreambuf, a streambuf class that manages an array of char.
63// Note that this class is not a template.
64
65class strstreambuf : public basic_streambuf<char, char_traits<char> >
66{
67public:                         // Types.
68  typedef char_traits<char>              _Traits;
69  typedef basic_streambuf<char, _Traits> _Base;
70
71public:                         // 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);
76  strstreambuf(signed char* __get, streamsize __n, signed char* __put = 0);
77  strstreambuf(unsigned char* __get, streamsize __n, unsigned char* __put=0);
78
79  strstreambuf(const char* __get, streamsize __n);
80  strstreambuf(const signed char* __get, streamsize __n);
81  strstreambuf(const unsigned char* __get, streamsize __n);
82
83  virtual ~strstreambuf();
84
85public:                         // strstreambuf operations.
86  void freeze(bool = true);
87  char* str();
88  int pcount() const;
89
90protected:                      // Overridden virtual member functions.
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
101private:                        // Helper functions.
102  // Dynamic allocation, possibly using _M_alloc_fun and _M_free_fun.
103  char* _M_alloc(size_t);
104  void  _M_free(char*);
105
106  // Helper function used in constructors.
107  void _M_setup(char* __get, char* __put, streamsize __n);
108
109private:                        // Data members.
110  void* (*_M_alloc_fun)(size_t);
111  void  (*_M_free_fun)(void*);
112
113  bool _M_dynamic  : 1;
114  bool _M_frozen   : 1;
115  bool _M_constant : 1;
116};
117
118//----------------------------------------------------------------------
119// Class istrstream, an istream that manages a strstreambuf.
120
121class istrstream : public basic_istream<char>
122{
123public:
124  explicit istrstream(char*);
125  explicit istrstream(const char*);
126  istrstream(char* , streamsize);
127  istrstream(const char*, streamsize);
128  virtual ~istrstream();
129
130  strstreambuf* rdbuf() const;
131  char* str();
132
133private:
134  strstreambuf _M_buf;
135};
136
137//----------------------------------------------------------------------
138// Class ostrstream
139
140class ostrstream : public basic_ostream<char>
141{
142public:
143  ostrstream();
144  ostrstream(char*, int, ios_base::openmode = ios_base::out);
145  virtual ~ostrstream();
146
147  strstreambuf* rdbuf() const;
148  void freeze(bool = true);
149  char* str();
150  int pcount() const;
151
152private:
153  strstreambuf _M_buf;
154};
155
156//----------------------------------------------------------------------
157// Class strstream
158
159class strstream : public basic_iostream<char>
160{
161public:
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  strstreambuf* rdbuf() const;
172  void freeze(bool = true);
173  int pcount() const;
174  char* str();
175
176private:
177  strstreambuf _M_buf;
178};
179
180} // namespace std
181
182#endif /* __SGI_STL_STRSTREAM */
183
184// Local Variables:
185// mode:C++
186// End:
187
188
189