public member function
<fstream>

std::basic_ifstream::rdbuf

basic_filebuf<char_type,traits_type>* rdbuf() const;
Get stream buffer
Returns a pointer to the internal basic_filebuf object.

Notice however, that this is not necessarily the same as the currently associated stream buffer (returned by basic_ios::rdbuf).

Parameters

none

Return Value

A pointer to the internal basic_filebuf object.
char_type and traits_type are member types defined as aliases of the class template parameters (see basic_ifstream types).

Example

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// read file data using associated buffer's members #include <iostream> // std::cout #include <fstream> // std::filebuf, std::ifstream int main () { std::ifstream ifs ("test.txt", std::ifstream::binary); // get pointer to associated buffer object std::filebuf* pbuf = ifs.rdbuf(); // get file size using buffer's members std::size_t size = pbuf->pubseekoff (0,ifs.end,ifs.in); pbuf->pubseekpos (0,ifs.in); // allocate memory to contain file data char* buffer=new char[size]; // get file data pbuf->sgetn (buffer,size); ifs.close(); // write content to stdout std::cout.write (buffer,size); delete[] buffer; return 0; }

Data races

Accesses the stream object.
Concurrent access to the same stream object may cause data races.

Exception safety

Strong guarantee: if an exception is thrown, there are no changes in the stream buffer.

See also