strstream

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

Generated on Thu Jul 23 21:16:28 2009 for libstdc++ by  doxygen 1.5.8