# strstream

    00001 // Backward-compat support -*- C++ -*-
    00002
    00003 // Copyright (C) 2001, 2002, 2004 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 2, 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 // You should have received a copy of the GNU General Public License along
    00017 // with this library; see the file COPYING.  If not, write to the Free
    00018 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
    00019 // USA.
    00020
    00021 // As a special exception, you may use this file as part of a free software
    00022 // library without restriction.  Specifically, if other files instantiate
    00023 // templates or use macros or inline functions from this file, or you compile
    00024 // this file and link it with other files to produce an executable, this
    00025 // file does not by itself cause the resulting executable to be covered by
    00026 // the GNU General Public License.  This exception does not however
    00027 // invalidate any other reasons why the executable file might be covered by
    00028 // the GNU General Public License.
    00029
    00030 /*
    00031  * Copyright (c) 1998
    00032  * Silicon Graphics Computer Systems, Inc.
    00033  *
    00034  * Permission to use, copy, modify, distribute and sell this software
    00035  * and its documentation for any purpose is hereby granted without fee,
    00036  * provided that the above copyright notice appear in all copies and
    00037  * that both that copyright notice and this permission notice appear
    00038  * in supporting documentation.  Silicon Graphics makes no
    00039  * representations about the suitability of this software for any
    00040  * purpose.  It is provided "as is" without express or implied warranty.
    00041  */
    00042
    00043 // WARNING: The classes defined in this header are DEPRECATED.  This
    00044 // header is defined in section D.7.1 of the C++ standard, and it
    00045 // MAY BE REMOVED in a future standard revision.  You should use the
    00046 // header <sstream> instead.
    00047
    00048 #ifndef __SGI_STL_STRSTREAM
    00049 #define __SGI_STL_STRSTREAM
    00050
    00051 #include "backward_warning.h"
    00052 #include <iosfwd>
    00053 #include <ios>
    00054 #include <istream>
    00055 #include <ostream>
    00056 #include <string>
    00057
    00058 namespace std
    00059 {
    00060   // Class strstreambuf, a streambuf class that manages an array of char.
    00061   // Note that this class is not a template.
    00062   class strstreambuf : public basic_streambuf<char, char_traits<char> >
    00063   {
    00064   public:
    00065     // Types.
    00066     typedef char_traits<char>              _Traits;
    00067     typedef basic_streambuf<char, _Traits> _Base;
    00068
    00069   public:
    00070     // Constructor, destructor
    00071     explicit strstreambuf(streamsize __initial_capacity = 0);
    00072     strstreambuf(void* (*__alloc)(size_t), void (*__free)(void*));
    00073
    00074     strstreambuf(char* __get, streamsize __n, char* __put = 0);
    00075     strstreambuf(signed char* __get, streamsize __n, signed char* __put = 0);
    00076     strstreambuf(unsigned char* __get, streamsize __n, unsigned char* __put=0);
    00077
    00078     strstreambuf(const char* __get, streamsize __n);
    00079     strstreambuf(const signed char* __get, streamsize __n);
    00080     strstreambuf(const unsigned char* __get, streamsize __n);
    00081
    00082     virtual ~strstreambuf();
    00083
    00084   public:
    00085     void freeze(bool = true);
    00086     char* str();
    00087     int pcount() const;
    00088
    00089   protected:
    00090     virtual int_type overflow(int_type __c  = _Traits::eof());
    00091     virtual int_type pbackfail(int_type __c = _Traits::eof());
    00092     virtual int_type underflow();
    00093     virtual _Base* setbuf(char* __buf, streamsize __n);
    00094     virtual pos_type seekoff(off_type __off, ios_base::seekdir __dir,
    00095                  ios_base::openmode __mode
    00096                  = ios_base::in | ios_base::out);
    00097     virtual pos_type seekpos(pos_type __pos, ios_base::openmode __mode
    00098                  = ios_base::in | ios_base::out);
    00099
    00100   private:
    00101     strstreambuf&
    00102     operator=(const strstreambuf&);
    00103
    00104     strstreambuf(const strstreambuf&);
    00105
    00106     // Dynamic allocation, possibly using _M_alloc_fun and _M_free_fun.
    00107     char* _M_alloc(size_t);
    00108     void  _M_free(char*);
    00109
    00110     // Helper function used in constructors.
    00111     void _M_setup(char* __get, char* __put, streamsize __n);
    00112
    00113   private:
    00114     // Data members.
    00115     void* (*_M_alloc_fun)(size_t);
    00116     void  (*_M_free_fun)(void*);
    00117
    00118     bool _M_dynamic  : 1;
    00119     bool _M_frozen   : 1;
    00120     bool _M_constant : 1;
    00121   };
    00122
    00123   // Class istrstream, an istream that manages a strstreambuf.
    00124   class istrstream : public basic_istream<char>
    00125   {
    00126   public:
    00127     explicit istrstream(char*);
    00128     explicit istrstream(const char*);
    00129     istrstream(char* , streamsize);
    00130     istrstream(const char*, streamsize);
    00131     virtual ~istrstream();
    00132
    00133     strstreambuf* rdbuf() const;
    00134     char* str();
    00135
    00136   private:
    00137     strstreambuf _M_buf;
    00138   };
    00139
    00140   // Class ostrstream
    00141   class ostrstream : public basic_ostream<char>
    00142   {
    00143   public:
    00144     ostrstream();
    00145     ostrstream(char*, int, ios_base::openmode = ios_base::out);
    00146     virtual ~ostrstream();
    00147
    00148     strstreambuf* rdbuf() const;
    00149     void freeze(bool = true);
    00150     char* str();
    00151     int pcount() const;
    00152
    00153   private:
    00154     strstreambuf _M_buf;
    00155   };
    00156
    00157   // Class strstream
    00158   class strstream : public basic_iostream<char>
    00159   {
    00160   public:
    00161     typedef char                        char_type;
    00162     typedef char_traits<char>::int_type int_type;
    00163     typedef char_traits<char>::pos_type pos_type;
    00164     typedef char_traits<char>::off_type off_type;
    00165
    00166     strstream();
    00167     strstream(char*, int, ios_base::openmode = ios_base::in | ios_base::out);
    00168     virtual ~strstream();
    00169
    00170     strstreambuf* rdbuf() const;
    00171     void freeze(bool = true);
    00172     int pcount() const;
    00173     char* str();
    00174
    00175   private:
    00176     strstreambuf _M_buf;
    00177   };
    00178 } // namespace std
    00179 #endif