Tools.h++ Manual

104011 Tandem Computers Incorporated 9-1
Using Class RWFile 9
Class RWFile encapsulates the standard C file operations for binary read and
write, using the ANSI-C function fopen() , fwrite() , fread() , etc. This
class is patterned on class PFile of the Interviews Class Library (1987, Stanford
University), but has been modified (and modernized) by Tools.h++ to use
" const " modifiers. The member function names begin with upper case letters
in order to maintain compatibility with class PFile .
The constructor for class RWFile has prototype:
RWFile(const char* filename, const char* mode = 0);
This constructor will open a binary file called filename with mode mode (as
defined by the Standard C function fopen() ; for example " r+ "). If mode is
zero (the default) then an existing file will be opened for update (mode “r+”
for Unix, “rb+” for DOS), while non existing files will be created (modes “w+”
and “wb+”). The destructor for this class closes the file.
There are member functions for flushing the file, and for testing whether the
file is empty, has had an error, or is at the end-of-file