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Name:       ifindhead

Purpose:    move current record pointer to first record by index

Prototype:  int ifindhead(Db_Obj *db, Index_Obj *index);

Header:     isam.h

Inputs:     db      - database handle
            index   - index handle

Description:
        ifindhead moves the file cursor (current record pointer) of the
        open database db to the record associated with the first entry
        in the index.

        ifindhead returns EOI (End Of Index) if there is no first record
        (i.e., if the database is empty).

Returns:
        OK, ERROR, or EOI.