libstdc++

strstream
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1 // Backward-compat support -*- C++ -*-
2
3 // Copyright (C) 2001-2013 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 backward/strstream
44 * This is an internal header file, included by other library headers.
45 * Do not attempt to use it directly. @headername{sstream}
46 */
47
48 #ifndef _BACKWARD_STRSTREAM
49 #define _BACKWARD_STRSTREAM
50
51 #include "backward_warning.h"
52 #include <iosfwd>
53 #include <ios>
54 #include <istream>
55 #include <ostream>
56 #include <string>
57
58 namespace std _GLIBCXX_VISIBILITY(default)
59 {
60 _GLIBCXX_BEGIN_NAMESPACE_VERSION
61
62 // Class strstreambuf, a streambuf class that manages an array of char.
63 // Note that this class is not a template.
64 class strstreambuf : public basic_streambuf<char, char_traits<char> >
65 {
66 public:
67 // Types.
68 typedef char_traits<char> _Traits;
69 typedef basic_streambuf<char, _Traits> _Base;
70
71 public:
72 // Constructor, destructor
73 explicit strstreambuf(streamsize __initial_capacity = 0);
74 strstreambuf(void* (*__alloc)(size_t), void (*__free)(void*));
75
76 strstreambuf(char* __get, streamsize __n, char* __put = 0) throw ();
77 strstreambuf(signed char* __get, streamsize __n, signed char* __put = 0) throw ();
78 strstreambuf(unsigned char* __get, streamsize __n, unsigned char* __put=0) throw ();
79
80 strstreambuf(const char* __get, streamsize __n) throw ();
81 strstreambuf(const signed char* __get, streamsize __n) throw ();
82 strstreambuf(const unsigned char* __get, streamsize __n) throw ();
83
84 virtual ~strstreambuf();
85
86 public:
87 void freeze(bool = true) throw ();
88 char* str() throw ();
89 _GLIBCXX_PURE int pcount() const throw ();
90
91 protected:
92 virtual int_type overflow(int_type __c = _Traits::eof());
93 virtual int_type pbackfail(int_type __c = _Traits::eof());
94 virtual int_type underflow();
95 virtual _Base* setbuf(char* __buf, streamsize __n);
96 virtual pos_type seekoff(off_type __off, ios_base::seekdir __dir,
97 ios_base::openmode __mode
98 = ios_base::in | ios_base::out);
99 virtual pos_type seekpos(pos_type __pos, ios_base::openmode __mode
100 = ios_base::in | ios_base::out);
101
102 private:
103 strstreambuf&
104 operator=(const strstreambuf&);
105
106 strstreambuf(const strstreambuf&);
107
108 // Dynamic allocation, possibly using _M_alloc_fun and _M_free_fun.
109 char* _M_alloc(size_t);
110 void _M_free(char*);
111
112 // Helper function used in constructors.
113 void _M_setup(char* __get, char* __put, streamsize __n) throw ();
114
115 private:
116 // Data members.
117 void* (*_M_alloc_fun)(size_t);
118 void (*_M_free_fun)(void*);
119
120 bool _M_dynamic : 1;
121 bool _M_frozen : 1;
122 bool _M_constant : 1;
123 };
124
125 // Class istrstream, an istream that manages a strstreambuf.
126 class istrstream : public basic_istream<char>
127 {
128 public:
129 explicit istrstream(char*);
130 explicit istrstream(const char*);
131 istrstream(char* , streamsize);
132 istrstream(const char*, streamsize);
133 virtual ~istrstream();
134
135 _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
136 char* str() throw ();
137
138 private:
139 strstreambuf _M_buf;
140 };
141
142 // Class ostrstream
143 class ostrstream : public basic_ostream<char>
144 {
145 public:
146 ostrstream();
147 ostrstream(char*, int, ios_base::openmode = ios_base::out);
148 virtual ~ostrstream();
149
150 _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
151 void freeze(bool = true) throw();
152 char* str() throw ();
153 _GLIBCXX_PURE int pcount() const throw ();
154
155 private:
156 strstreambuf _M_buf;
157 };
158
159 // Class strstream
160 class strstream : public basic_iostream<char>
161 {
162 public:
163 typedef char char_type;
164 typedef char_traits<char>::int_type int_type;
165 typedef char_traits<char>::pos_type pos_type;
166 typedef char_traits<char>::off_type off_type;
167
168 strstream();
169 strstream(char*, int, ios_base::openmode = ios_base::in | ios_base::out);
170 virtual ~strstream();
171
172 _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
173 void freeze(bool = true) throw ();
174 _GLIBCXX_PURE int pcount() const throw ();
175 char* str() throw ();
176
177 private:
178 strstreambuf _M_buf;
179 };
180
181 _GLIBCXX_END_NAMESPACE_VERSION
182 } // namespace
183
184 #endif