strstream source code [include/c++/7/backward/strstream]

1	// Backward-compat support -- C++ --
2
3	// Copyright (C) 2001-2017 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
183

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