dfindp - find previous active record
#include
rno_t dfindp (buffer, fcb)
char *buffer;
DFILE *fcb;
Dfindp finds the previous active record in an RMSfile and returns
it in buffer. The order of the keys returned by successive calls
to dfindp is undefined. Each record returned is one that has been
added to the RMSfile but not deleted.
Fcb is the file block pointer returned by dlopen(C-3)
or
dopen(C-3). Buffer is assumed to be
large enough to hold the
record.
The returned record number may be saved and used on a subsequent
call to dread(C-3). An RMSfile can
be read sequentially in
reverse order by calling dfindl(C-3)
followed by successive calls
to dfindp. Calls to dfindn(C-3) are
allowed before or after a
call to dfindp(C-3).
dlopen(C-3), dopen(C-3),
dfindl(C-3), dfindn(C-3),
dread(C-3)
Chapter 4, RMS Programming Guide
Dfindp returns a value of BAD (-1) if the last active record in
the RMSfile has already been read or if an I/O error occurred.