#include "btree.h"
int btrecs(BTA* btact, char* key, int* rsize);
The btrecs function returns the number of
bytes occupied by the data record of a key in the file
associated with the btact context
pointer. The key parameter is a
character pointer, identifying the key to query. The number
of bytes occupied by the data record is returned in
rsize. If the key is located and the
data size of the record returned successfully,
btrecs returns zero.
If btrecs is invoked for a
key without an associated data record,
the results are undefined.
A non-zero return from btrecs
indicates an error occurred.