# strstream

    00001 // Backward-compat support -*- C++ -*-
    00002
    00003 // Copyright (C) 2001, 2002, 2004, 2005, 2009, 2010
    00004 // Free Software Foundation, Inc.
    00005 //
    00006 // This file is part of the GNU ISO C++ Library.  This library is free
    00007 // software; you can redistribute it and/or modify it under the
    00008 // terms of the GNU General Public License as published by the
    00009 // Free Software Foundation; either version 3, or (at your option)
    00010 // any later version.
    00011
    00012 // This library is distributed in the hope that it will be useful,
    00013 // but WITHOUT ANY WARRANTY; without even the implied warranty of
    00014 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00015 // GNU General Public License for more details.
    00016
    00017 // Under Section 7 of GPL version 3, you are granted additional
    00018 // permissions described in the GCC Runtime Library Exception, version
    00019 // 3.1, as published by the Free Software Foundation.
    00020
    00021 // You should have received a copy of the GNU General Public License and
    00022 // a copy of the GCC Runtime Library Exception along with this program;
    00023 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
    00024 // <http://www.gnu.org/licenses/>.
    00025
    00026 /*
    00027  * Copyright (c) 1998
    00028  * Silicon Graphics Computer Systems, Inc.
    00029  *
    00030  * Permission to use, copy, modify, distribute and sell this software
    00031  * and its documentation for any purpose is hereby granted without fee,
    00032  * provided that the above copyright notice appear in all copies and
    00033  * that both that copyright notice and this permission notice appear
    00034  * in supporting documentation.  Silicon Graphics makes no
    00035  * representations about the suitability of this software for any
    00036  * purpose.  It is provided "as is" without express or implied warranty.
    00037  */
    00038
    00039 // WARNING: The classes defined in this header are DEPRECATED.  This
    00040 // header is defined in section D.7.1 of the C++ standard, and it
    00041 // MAY BE REMOVED in a future standard revision.  One should use the
    00042 // header <sstream> instead.
    00043
    00044 #ifndef _BACKWARD_STRSTREAM
    00045 #define _BACKWARD_STRSTREAM
    00046
    00047 #include "backward_warning.h"
    00048 #include <iosfwd>
    00049 #include <ios>
    00050 #include <istream>
    00051 #include <ostream>
    00052 #include <string>
    00053
    00054 _GLIBCXX_BEGIN_NAMESPACE(std)
    00055
    00056   // Class strstreambuf, a streambuf class that manages an array of char.
    00057   // Note that this class is not a template.
    00058   class strstreambuf : public basic_streambuf<char, char_traits<char> >
    00059   {
    00060   public:
    00061     // Types.
    00062     typedef char_traits<char>              _Traits;
    00063     typedef basic_streambuf<char, _Traits> _Base;
    00064
    00065   public:
    00066     // Constructor, destructor
    00067     explicit strstreambuf(streamsize __initial_capacity = 0);
    00068     strstreambuf(void* (*__alloc)(size_t), void (*__free)(void*));
    00069
    00070     strstreambuf(char* __get, streamsize __n, char* __put = 0) throw ();
    00071     strstreambuf(signed char* __get, streamsize __n, signed char* __put = 0) throw ();
    00072     strstreambuf(unsigned char* __get, streamsize __n, unsigned char* __put=0) throw ();
    00073
    00074     strstreambuf(const char* __get, streamsize __n) throw ();
    00075     strstreambuf(const signed char* __get, streamsize __n) throw ();
    00076     strstreambuf(const unsigned char* __get, streamsize __n) throw ();
    00077
    00078     virtual ~strstreambuf();
    00079
    00080   public:
    00081     void freeze(bool = true) throw ();
    00082     char* str() throw ();
    00083     _GLIBCXX_PURE int pcount() const throw ();
    00084
    00085   protected:
    00086     virtual int_type overflow(int_type __c  = _Traits::eof());
    00087     virtual int_type pbackfail(int_type __c = _Traits::eof());
    00088     virtual int_type underflow();
    00089     virtual _Base* setbuf(char* __buf, streamsize __n);
    00090     virtual pos_type seekoff(off_type __off, ios_base::seekdir __dir,
    00091                  ios_base::openmode __mode
    00092                  = ios_base::in | ios_base::out);
    00093     virtual pos_type seekpos(pos_type __pos, ios_base::openmode __mode
    00094                  = ios_base::in | ios_base::out);
    00095
    00096   private:
    00097     strstreambuf&
    00098     operator=(const strstreambuf&);
    00099
    00100     strstreambuf(const strstreambuf&);
    00101
    00102     // Dynamic allocation, possibly using _M_alloc_fun and _M_free_fun.
    00103     char* _M_alloc(size_t);
    00104     void  _M_free(char*);
    00105
    00106     // Helper function used in constructors.
    00107     void _M_setup(char* __get, char* __put, streamsize __n) throw ();
    00108
    00109   private:
    00110     // Data members.
    00111     void* (*_M_alloc_fun)(size_t);
    00112     void  (*_M_free_fun)(void*);
    00113
    00114     bool _M_dynamic  : 1;
    00115     bool _M_frozen   : 1;
    00116     bool _M_constant : 1;
    00117   };
    00118
    00119   // Class istrstream, an istream that manages a strstreambuf.
    00120   class istrstream : public basic_istream<char>
    00121   {
    00122   public:
    00123     explicit istrstream(char*);
    00124     explicit istrstream(const char*);
    00125     istrstream(char* , streamsize);
    00126     istrstream(const char*, streamsize);
    00127     virtual ~istrstream();
    00128
    00129     _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
    00130     char* str() throw ();
    00131
    00132   private:
    00133     strstreambuf _M_buf;
    00134   };
    00135
    00136   // Class ostrstream
    00137   class ostrstream : public basic_ostream<char>
    00138   {
    00139   public:
    00140     ostrstream();
    00141     ostrstream(char*, int, ios_base::openmode = ios_base::out);
    00142     virtual ~ostrstream();
    00143
    00144     _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
    00145     void freeze(bool = true) throw();
    00146     char* str() throw ();
    00147     _GLIBCXX_PURE int pcount() const throw ();
    00148
    00149   private:
    00150     strstreambuf _M_buf;
    00151   };
    00152
    00153   // Class strstream
    00154   class strstream : public basic_iostream<char>
    00155   {
    00156   public:
    00157     typedef char                        char_type;
    00158     typedef char_traits<char>::int_type int_type;
    00159     typedef char_traits<char>::pos_type pos_type;
    00160     typedef char_traits<char>::off_type off_type;
    00161
    00162     strstream();
    00163     strstream(char*, int, ios_base::openmode = ios_base::in | ios_base::out);
    00164     virtual ~strstream();
    00165
    00166     _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
    00167     void freeze(bool = true) throw ();
    00168     _GLIBCXX_PURE int pcount() const throw ();
    00169     char* str() throw ();
    00170
    00171   private:
    00172     strstreambuf _M_buf;
    00173   };
    00174
    00175 _GLIBCXX_END_NAMESPACE
    00176
    00177 #endif