#include "btree.h"
int btpos(BTA* btact, int pos);
The btpos function sets the position in
the current root in the file associated with the
btact context pointer. The desired
position is indicated by the pos; a
value of 1 positions before the first key in the index, a
value of 2 will position after the last key in the
index. These values correspond to the B Tree constants ZSTART
and ZEND, respectively.
Following a call to btpos, calls to bnxtky and bprvky may be
made to return successive or previous keys.
btpos returns zero to indicate success,
otherwise the error code if an error was encountered.