Objects of this class let you use an array of bytes (a string of
  characters) in memory as a streambuf for stream input/output
  operations on various kinds of data. Mapping between abstract get and
  put pointers and char* pointers is direct in the sense that a char* is
  interpreted as pointing immediately ahead of the char it points to.
  Moving the pointers corresponds to incrementing and decrementing the
  char* values.

  To accommodate the need for strings of arbitrary length, this class
  supports a dynamic mode. When a strstreambuf object is in dynamic
  mode, space for the character is allocated as needed. When the
  sequence is extended too far, it is copied to a new array.

  Header:

 	#include <strstream.hxx>