strstream File Reference

#include "backward_warning.h"
#include <iosfwd>
#include <ios>
#include <istream>
#include <ostream>
#include <string>

Macros
#define	_BACKWARD_STRSTREAM

Functions
namespace std	_GLIBCXX_VISIBILITY (default)

Detailed Description

This is an internal header file, included by other library headers. Do not attempt to use it directly. {sstream}

Macro Definition Documentation

#define _BACKWARD_STRSTREAM

Function Documentation

namespace std _GLIBCXX_VISIBILITY

(

default

)

{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

  // Class strstreambuf, a streambuf class that manages an array of char.
  // Note that this class is not a template.
  class strstreambuf : public basic_streambuf<char, char_traits<char> >
  {
  public:
    // Types.
    typedef char_traits<char>              _Traits;
    typedef basic_streambuf<char, _Traits> _Base;

  public:
    // Constructor, destructor
    explicit strstreambuf(streamsize __initial_capacity = 0);
    strstreambuf(void* (*__alloc)(size_t), void (*__free)(void*));

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

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

    virtual ~strstreambuf();

  public:
    void freeze(bool = true) throw ();
    char* str() throw ();
    _GLIBCXX_PURE int pcount() const throw ();

  protected:
    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:
    strstreambuf&
    operator=(const strstreambuf&);

    strstreambuf(const strstreambuf&);

    // 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) throw ();

  private:
    // Data members.
    void* (*_M_alloc_fun)(size_t);
    void  (*_M_free_fun)(void*);

    bool _M_dynamic  : 1;
    bool _M_frozen   : 1;
    bool _M_constant : 1;
  };

  // Class istrstream, an istream that manages a strstreambuf.
  class istrstream : public basic_istream<char>
  {
  public:
    explicit istrstream(char*);
    explicit istrstream(const char*);
    istrstream(char* , streamsize);
    istrstream(const char*, streamsize);
    virtual ~istrstream();

    _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
    char* str() throw ();

  private:
    strstreambuf _M_buf;
  };

  // Class ostrstream
  class ostrstream : public basic_ostream<char>
  {
  public:
    ostrstream();
    ostrstream(char*, int, ios_base::openmode = ios_base::out);
    virtual ~ostrstream();

    _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
    void freeze(bool = true) throw();
    char* str() throw ();
    _GLIBCXX_PURE int pcount() const throw ();

  private:
    strstreambuf _M_buf;
  };

  // Class strstream
  class strstream : public basic_iostream<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();

    _GLIBCXX_CONST strstreambuf* rdbuf() const throw ();
    void freeze(bool = true) throw ();
    _GLIBCXX_PURE int pcount() const throw ();
    char* str() throw ();

  private:
    strstreambuf _M_buf;
  };

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace