diff options
Diffstat (limited to 'main/db1-ast/recno/rec_seq.c')
| -rw-r--r-- | main/db1-ast/recno/rec_seq.c | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/main/db1-ast/recno/rec_seq.c b/main/db1-ast/recno/rec_seq.c deleted file mode 100644 index ca3451ca6..000000000 --- a/main/db1-ast/recno/rec_seq.c +++ /dev/null @@ -1,131 +0,0 @@ -/*- - * Copyright (c) 1991, 1993, 1994 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#if defined(LIBC_SCCS) && !defined(lint) -static char sccsid[] = "@(#)rec_seq.c 8.3 (Berkeley) 7/14/94"; -#endif /* not lint */ - -#include <sys/types.h> - -#include <errno.h> -#include <limits.h> -#include <stdio.h> -#include <string.h> - -#include "../include/db.h" -#include "recno.h" - -/* - * __REC_SEQ -- Recno sequential scan interface. - * - * Parameters: - * dbp: pointer to access method - * key: key for positioning and return value - * data: data return value - * flags: R_CURSOR, R_FIRST, R_LAST, R_NEXT, R_PREV. - * - * Returns: - * RET_ERROR, RET_SUCCESS or RET_SPECIAL if there's no next key. - */ -int -__rec_seq(dbp, key, data, flags) - const DB *dbp; - DBT *key, *data; - u_int flags; -{ - BTREE *t; - EPG *e; - recno_t nrec; - int status; - - t = dbp->internal; - - /* Toss any page pinned across calls. */ - if (t->bt_pinned != NULL) { - mpool_put(t->bt_mp, t->bt_pinned, 0); - t->bt_pinned = NULL; - } - - switch(flags) { - case R_CURSOR: - if ((nrec = *(recno_t *)key->data) == 0) - goto einval; - break; - case R_NEXT: - if (F_ISSET(&t->bt_cursor, CURS_INIT)) { - nrec = t->bt_cursor.rcursor + 1; - break; - } - /* FALLTHROUGH */ - case R_FIRST: - nrec = 1; - break; - case R_PREV: - if (F_ISSET(&t->bt_cursor, CURS_INIT)) { - if ((nrec = t->bt_cursor.rcursor - 1) == 0) - return (RET_SPECIAL); - break; - } - /* FALLTHROUGH */ - case R_LAST: - if (!F_ISSET(t, R_EOF | R_INMEM) && - t->bt_irec(t, MAX_REC_NUMBER) == RET_ERROR) - return (RET_ERROR); - nrec = t->bt_nrecs; - break; - default: -einval: errno = EINVAL; - return (RET_ERROR); - } - - if (t->bt_nrecs == 0 || nrec > t->bt_nrecs) { - if (!F_ISSET(t, R_EOF | R_INMEM) && - (status = t->bt_irec(t, nrec)) != RET_SUCCESS) - return (status); - if (t->bt_nrecs == 0 || nrec > t->bt_nrecs) - return (RET_SPECIAL); - } - - if ((e = __rec_search(t, nrec - 1, SEARCH)) == NULL) - return (RET_ERROR); - - F_SET(&t->bt_cursor, CURS_INIT); - t->bt_cursor.rcursor = nrec; - - status = __rec_ret(t, e, nrec, key, data); - if (F_ISSET(t, B_DB_LOCK)) - mpool_put(t->bt_mp, e->page, 0); - else - t->bt_pinned = e->page; - return (status); -} |