/*

  * Copyright (c) 1999

  * Silicon Graphics Computer Systems, Inc.

  *

  * Copyright (c) 1999

  * Boris Fomitchev

  *

  * This material is provided "as is", with absolutely no warranty expressed

  * or implied. Any use is at your own risk.

  *

  * Permission to use or copy this software for any purpose is hereby granted

  * without fee, provided the above notices are retained on all copies.

  * Permission to modify the code and to distribute modified code is granted,

  * provided the above notices are retained, and a notice that the code was

  * modified is included with the above copyright notice.

  *

  */

 #ifndef _STLP_INTERNAL_STRSTREAM

 #define _STLP_INTERNAL_STRSTREAM

 #ifndef _STLP_INTERNAL_STREAMBUF

 #  include <stl/_streambuf.h>

 #endif

 #ifndef _STLP_INTERNAL_ISTREAM

 #  include <stl/_istream.h>              // Includes <ostream>, <ios>, <iosfwd>

 #endif

 #ifndef _STLP_INTERNAL_STRING_H

 #  include <stl/_string.h>

 #endif

 _STLP_BEGIN_NAMESPACE

 #ifndef _STLP_USE_NAMESPACES

 #  define strstream _STLP_strstream

 #  define ostrstream _STLP_ostrstream

 #  define istrstream _STLP_istrstream

 #  define strstreambuf _STLP_strstreambuf

 #endif

 //----------------------------------------------------------------------

 // Class strstreambuf, a streambuf class that manages an array of char.

 // Note that this class is not a template.

 class _STLP_CLASS_DECLSPEC strstreambuf : public basic_streambuf<char, char_traits<char> > {

 public:                         // Types.

   typedef char_traits<char>              _Traits;

   typedef basic_streambuf<char, char_traits<char> > _Base;

   typedef void* (*__alloc_fn)(size_t);

   typedef void (*__free_fn)(void*);

 public:                         // Constructor, destructor

   explicit strstreambuf(streamsize _Initial_capacity = 0);

   strstreambuf(__alloc_fn, __free_fn);

   strstreambuf(char* __get, streamsize __n, char* __put = 0);

   strstreambuf(signed char* __get, streamsize __n, signed char* __put = 0);

   strstreambuf(unsigned char* __get, streamsize __n, unsigned char* __put=0);

   strstreambuf(const char* __get, streamsize __n);

   strstreambuf(const signed char* __get, streamsize __n);

   strstreambuf(const unsigned char* __get, streamsize __n);

   virtual ~strstreambuf();

 public:                         // strstreambuf operations.

   void freeze(bool = true);

   char* str();

   int pcount() const;

 protected:                      // Overridden virtual member functions.

   virtual int_type overflow(int_type __c  = _Traits::eof());

   virtual int_type pbackfail(int_type __c = _Traits::eof());

   virtual int_type underflow();

   virtual _Base* setbuf(char* __buf, streamsize __n);

   virtual pos_type seekoff(off_type __off, ios_base::seekdir __dir,

                            ios_base::openmode __mode

                                       = ios_base::in | ios_base::out);

   virtual pos_type seekpos(pos_type __pos, ios_base::openmode __mode

                                       = ios_base::in | ios_base::out);

 private:                        // Helper functions.

   // Dynamic allocation, possibly using _M_alloc_fun and _M_free_fun.

   char* _M_alloc(size_t);

   void  _M_free(char*);

   // Helper function used in constructors.

   void _M_setup(char* __get, char* __put, streamsize __n);

 private:                        // Data members.

   __alloc_fn _M_alloc_fun;

   __free_fn  _M_free_fun;

   bool _M_dynamic  : 1;

   bool _M_frozen   : 1;

   bool _M_constant : 1;

 };

 //----------------------------------------------------------------------

 // Class istrstream, an istream that manages a strstreambuf.

 class _STLP_CLASS_DECLSPEC istrstream : public basic_istream<char, char_traits<char> > {

 public:

   explicit istrstream(char*);

   explicit istrstream(const char*);

   istrstream(char* , streamsize);

   istrstream(const char*, streamsize);

   virtual ~istrstream();

   strstreambuf* rdbuf() const;

   char* str();

 private:

   strstreambuf _M_buf;

 };

 //----------------------------------------------------------------------

 // Class ostrstream

 class _STLP_CLASS_DECLSPEC ostrstream : public basic_ostream<char, char_traits<char> >

 {

 public:

   ostrstream();

   ostrstream(char*, int, ios_base::openmode = ios_base::out);

   virtual ~ostrstream();

   strstreambuf* rdbuf() const;

   void freeze(bool = true);

   char* str();

   int pcount() const;

 private:

   strstreambuf _M_buf;

 };

 //----------------------------------------------------------------------

 // Class strstream

 class _STLP_CLASS_DECLSPEC strstream : public basic_iostream<char, char_traits<char> > {

 public:

   typedef char                        char_type;

   typedef char_traits<char>::int_type int_type;

   typedef char_traits<char>::pos_type pos_type;

   typedef char_traits<char>::off_type off_type;

   strstream();

   strstream(char*, int, ios_base::openmode = ios_base::in | ios_base::out);

   virtual ~strstream();

   strstreambuf* rdbuf() const;

   void freeze(bool = true);

   int pcount() const;

   char* str();

 private:

   strstreambuf _M_buf;

   //explicitely defined as private to avoid warnings:

   strstream(strstream const&);

   strstream& operator = (strstream const&);

 };

 _STLP_END_NAMESPACE

 #endif /* _STLP_INTERNAL_STRSTREAM */