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32 #include <sys/cdefs.h>
34 /* XXX use __SCCSID */
35 static char sccsid[] __unused = "@(#)rec_seq.c 8.3 (Berkeley) 7/14/94";
37 __FBSDID("$FreeBSD$");
39 #include <sys/types.h>
50 * __REC_SEQ -- Recno sequential scan interface.
53 * dbp: pointer to access method
54 * key: key for positioning and return value
55 * data: data return value
56 * flags: R_CURSOR, R_FIRST, R_LAST, R_NEXT, R_PREV.
59 * RET_ERROR, RET_SUCCESS or RET_SPECIAL if there's no next key.
62 __rec_seq(const DB *dbp, DBT *key, DBT *data, u_int flags)
71 /* Toss any page pinned across calls. */
72 if (t->bt_pinned != NULL) {
73 mpool_put(t->bt_mp, t->bt_pinned, 0);
79 if ((nrec = *(recno_t *)key->data) == 0)
83 if (F_ISSET(&t->bt_cursor, CURS_INIT)) {
84 nrec = t->bt_cursor.rcursor + 1;
92 if (F_ISSET(&t->bt_cursor, CURS_INIT)) {
93 if ((nrec = t->bt_cursor.rcursor - 1) == 0)
99 if (!F_ISSET(t, R_EOF | R_INMEM) &&
100 t->bt_irec(t, MAX_REC_NUMBER) == RET_ERROR)
105 einval: errno = EINVAL;
109 if (t->bt_nrecs == 0 || nrec > t->bt_nrecs) {
110 if (!F_ISSET(t, R_EOF | R_INMEM) &&
111 (status = t->bt_irec(t, nrec)) != RET_SUCCESS)
113 if (t->bt_nrecs == 0 || nrec > t->bt_nrecs)
114 return (RET_SPECIAL);
117 if ((e = __rec_search(t, nrec - 1, SEARCH)) == NULL)
120 F_SET(&t->bt_cursor, CURS_INIT);
121 t->bt_cursor.rcursor = nrec;
123 status = __rec_ret(t, e, nrec, key, data);
124 if (F_ISSET(t, B_DB_LOCK))
125 mpool_put(t->bt_mp, e->page, 0);
127 t->bt_pinned = e->page;