Set input buffer pointers.
  Sets the values that define the input sequence's boundaries and get pointer.

Parameters.

gbeg

New value for the pointer to the beginning of the input sequence.

gnext

New value for the pointer to the next element within the input sequence where next input operation shall be performed.

gend

New value for the end pointer, just past the end of the input sequence.

Return Value.
  none

Basic template member declaration ( basic_streambuf<charT,traits> ):

typedef charT char_type; void gbump ( char_type* gbeg, char_type* gnext, char_type* gend );

See also.
  gbump, eback, egptr, gptr
  streambuf class