strstream revision 102782 
1// Backward-compat support -*- C++ -*-
2
3// Copyright (C) 2001, 2002 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  // 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);
75    strstreambuf(signed char* __get, streamsize __n, signed char* __put = 0);
76    strstreambuf(unsigned char* __get, streamsize __n, unsigned char* __put=0);
77
78    strstreambuf(const char* __get, streamsize __n);
79    strstreambuf(const signed char* __get, streamsize __n);
80    strstreambuf(const unsigned char* __get, streamsize __n);
81
82    virtual ~strstreambuf();
83
84  public:
85    void freeze(bool = true);
86    char* str();
87    int pcount() const;
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    // Dynamic allocation, possibly using _M_alloc_fun and _M_free_fun.
102    char* _M_alloc(size_t);
103    void  _M_free(char*);
104
105    // Helper function used in constructors.
106    void _M_setup(char* __get, char* __put, streamsize __n);
107
108  private:  
109    // 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  // Class istrstream, an istream that manages a strstreambuf.
119  class istrstream : public basic_istream<char>
120  {
121  public:
122    explicit istrstream(char*);
123    explicit istrstream(const char*);
124    istrstream(char* , streamsize);
125    istrstream(const char*, streamsize);
126    virtual ~istrstream();
127
128    strstreambuf* rdbuf() const;
129    char* str();
130
131  private:
132    strstreambuf _M_buf;
133  };
134
135  // Class ostrstream
136  class ostrstream : public basic_ostream<char>
137  {
138  public:
139    ostrstream();
140    ostrstream(char*, int, ios_base::openmode = ios_base::out);
141    virtual ~ostrstream();
142
143    strstreambuf* rdbuf() const;
144    void freeze(bool = true);
145    char* str();
146    int pcount() const;
147
148  private:
149    strstreambuf _M_buf;
150  };
151
152  // Class strstream
153  class strstream : public basic_iostream<char>
154  {
155  public:
156    typedef char                        char_type;
157    typedef char_traits<char>::int_type int_type;
158    typedef char_traits<char>::pos_type pos_type;
159    typedef char_traits<char>::off_type off_type;
160
161    strstream();
162    strstream(char*, int, ios_base::openmode = ios_base::in | ios_base::out);
163    virtual ~strstream();
164
165    strstreambuf* rdbuf() const;
166    void freeze(bool = true);
167    int pcount() const;
168    char* str();
169
170  private:
171    strstreambuf _M_buf;
172  };
173} // namespace std
174#endif 
175