fstream::rdbuf


public member function
filebuf* rdbuf ( ) const;

Get the associated filebuf object

Returns a pointer to the filebuf object associated with the stream.

Parameters

none

Return Value

A pointer to the filebuf object associated with the stream.
Notice that for any successfully constructed fstream object this pointer is never a null pointer, even if no files have been opened or if the stream is unbuffered.

Example

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// open and close a file using buffer members
#include <fstream>
using namespace std;

int main () {
  char ch;
  fstream filestr;
  filebuf *pbuf;

  pbuf=filestr.rdbuf();
  
  pbuf->open ("test.txt", fstream::in | fstream::out);

  // >> i/o operations here <<

  pbuf->close();

  return 0;
}


The example opens an input and an output file, then gets the pointers to their respective file buffers and performs operations on them to make a character-by-character copy of the input file.

Basic template member declaration

( basic_ofstream<charT,traits,Allocator> )
  
basic_filebuf<charT,traits,Allocator> * rdbuf () const;


See also

ios::rdbuf Get/set the associated stream buffer (public member function)
filebuf File stream buffer (class)