#include "btree.h"
int bnxtky(BTA* btact, char* key, BTint* value);
The bnxtky function returns the next key
from the current root in the file associated with the
btact context pointer. The key, a
character string, is returned via the pointer in
key. The value associated with the key
will be returned in the integer location identified by
value. value is
declared as a BTint, which is normally a typedef for
int, but with Large File Support will be
a typedef for long long.
bnxtky returns zero to indicate the next
key has been located. If no next key exists,
bnxtky returns the error code
QNOKEY.
To initialise the B Tree position, a call to bfndky or btpos must be
made before the first call to bnxtky.
Thereafter, repeated calls to bnxtky may
be made. Calls to bprvky may be
freely intermingled with calls to bnxtky.
A non-zero return from bnxtky
indicates an error occurred during the key location process.
