+++ /dev/null
-/*-
- * Copyright (c) 1990, 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_put.c 8.7 (Berkeley) 8/18/94";
-#endif /* LIBC_SCCS and not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/db/recno/rec_put.c,v 1.6 2002/03/22 21:52:02 obrien Exp $");
-
-#include <sys/types.h>
-
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <db.h>
-#include "recno.h"
-
-/*
- * __REC_PUT -- Add a recno item to the tree.
- *
- * Parameters:
- * dbp: pointer to access method
- * key: key
- * data: data
- * flag: R_CURSOR, R_IAFTER, R_IBEFORE, R_NOOVERWRITE
- *
- * Returns:
- * RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key is
- * already in the tree and R_NOOVERWRITE specified.
- */
-int
-__rec_put(dbp, key, data, flags)
- const DB *dbp;
- DBT *key;
- const DBT *data;
- u_int flags;
-{
- BTREE *t;
- DBT fdata, tdata;
- 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;
- }
-
- /*
- * If using fixed-length records, and the record is long, return
- * EINVAL. If it's short, pad it out. Use the record data return
- * memory, it's only short-term.
- */
- if (F_ISSET(t, R_FIXLEN) && data->size != t->bt_reclen) {
- if (data->size > t->bt_reclen)
- goto einval;
-
- if (t->bt_rdata.size < t->bt_reclen) {
- t->bt_rdata.data =
- reallocf(t->bt_rdata.data, t->bt_reclen);
- if (t->bt_rdata.data == NULL)
- return (RET_ERROR);
- t->bt_rdata.size = t->bt_reclen;
- }
- memmove(t->bt_rdata.data, data->data, data->size);
- memset((char *)t->bt_rdata.data + data->size,
- t->bt_bval, t->bt_reclen - data->size);
- fdata.data = t->bt_rdata.data;
- fdata.size = t->bt_reclen;
- } else {
- fdata.data = data->data;
- fdata.size = data->size;
- }
-
- switch (flags) {
- case R_CURSOR:
- if (!F_ISSET(&t->bt_cursor, CURS_INIT))
- goto einval;
- nrec = t->bt_cursor.rcursor;
- break;
- case R_SETCURSOR:
- if ((nrec = *(recno_t *)key->data) == 0)
- goto einval;
- break;
- case R_IAFTER:
- if ((nrec = *(recno_t *)key->data) == 0) {
- nrec = 1;
- flags = R_IBEFORE;
- }
- break;
- case 0:
- case R_IBEFORE:
- if ((nrec = *(recno_t *)key->data) == 0)
- goto einval;
- break;
- case R_NOOVERWRITE:
- if ((nrec = *(recno_t *)key->data) == 0)
- goto einval;
- if (nrec <= t->bt_nrecs)
- return (RET_SPECIAL);
- break;
- default:
-einval: errno = EINVAL;
- return (RET_ERROR);
- }
-
- /*
- * Make sure that records up to and including the put record are
- * already in the database. If skipping records, create empty ones.
- */
- if (nrec > t->bt_nrecs) {
- if (!F_ISSET(t, R_EOF | R_INMEM) &&
- t->bt_irec(t, nrec) == RET_ERROR)
- return (RET_ERROR);
- if (nrec > t->bt_nrecs + 1) {
- if (F_ISSET(t, R_FIXLEN)) {
- if ((tdata.data =
- (void *)malloc(t->bt_reclen)) == NULL)
- return (RET_ERROR);
- tdata.size = t->bt_reclen;
- memset(tdata.data, t->bt_bval, tdata.size);
- } else {
- tdata.data = NULL;
- tdata.size = 0;
- }
- while (nrec > t->bt_nrecs + 1)
- if (__rec_iput(t,
- t->bt_nrecs, &tdata, 0) != RET_SUCCESS)
- return (RET_ERROR);
- if (F_ISSET(t, R_FIXLEN))
- free(tdata.data);
- }
- }
-
- if ((status = __rec_iput(t, nrec - 1, &fdata, flags)) != RET_SUCCESS)
- return (status);
-
- switch (flags) {
- case R_IAFTER:
- nrec++;
- break;
- case R_SETCURSOR:
- t->bt_cursor.rcursor = nrec;
- break;
- }
-
- F_SET(t, R_MODIFIED);
- return (__rec_ret(t, NULL, nrec, key, NULL));
-}
-
-/*
- * __REC_IPUT -- Add a recno item to the tree.
- *
- * Parameters:
- * t: tree
- * nrec: record number
- * data: data
- *
- * Returns:
- * RET_ERROR, RET_SUCCESS
- */
-int
-__rec_iput(t, nrec, data, flags)
- BTREE *t;
- recno_t nrec;
- const DBT *data;
- u_int flags;
-{
- DBT tdata;
- EPG *e;
- PAGE *h;
- indx_t index, nxtindex;
- pgno_t pg;
- u_int32_t nbytes;
- int dflags, status;
- char *dest, db[NOVFLSIZE];
-
- /*
- * If the data won't fit on a page, store it on indirect pages.
- *
- * XXX
- * If the insert fails later on, these pages aren't recovered.
- */
- if (data->size > t->bt_ovflsize) {
- if (__ovfl_put(t, data, &pg) == RET_ERROR)
- return (RET_ERROR);
- tdata.data = db;
- tdata.size = NOVFLSIZE;
- *(pgno_t *)db = pg;
- *(u_int32_t *)(db + sizeof(pgno_t)) = data->size;
- dflags = P_BIGDATA;
- data = &tdata;
- } else
- dflags = 0;
-
- /* __rec_search pins the returned page. */
- if ((e = __rec_search(t, nrec,
- nrec > t->bt_nrecs || flags == R_IAFTER || flags == R_IBEFORE ?
- SINSERT : SEARCH)) == NULL)
- return (RET_ERROR);
-
- h = e->page;
- index = e->index;
-
- /*
- * Add the specified key/data pair to the tree. The R_IAFTER and
- * R_IBEFORE flags insert the key after/before the specified key.
- *
- * Pages are split as required.
- */
- switch (flags) {
- case R_IAFTER:
- ++index;
- break;
- case R_IBEFORE:
- break;
- default:
- if (nrec < t->bt_nrecs &&
- __rec_dleaf(t, h, index) == RET_ERROR) {
- mpool_put(t->bt_mp, h, 0);
- return (RET_ERROR);
- }
- break;
- }
-
- /*
- * If not enough room, split the page. The split code will insert
- * the key and data and unpin the current page. If inserting into
- * the offset array, shift the pointers up.
- */
- nbytes = NRLEAFDBT(data->size);
- if (h->upper - h->lower < nbytes + sizeof(indx_t)) {
- status = __bt_split(t, h, NULL, data, dflags, nbytes, index);
- if (status == RET_SUCCESS)
- ++t->bt_nrecs;
- return (status);
- }
-
- if (index < (nxtindex = NEXTINDEX(h)))
- memmove(h->linp + index + 1, h->linp + index,
- (nxtindex - index) * sizeof(indx_t));
- h->lower += sizeof(indx_t);
-
- h->linp[index] = h->upper -= nbytes;
- dest = (char *)h + h->upper;
- WR_RLEAF(dest, data, dflags);
-
- ++t->bt_nrecs;
- F_SET(t, B_MODIFIED);
- mpool_put(t->bt_mp, h, MPOOL_DIRTY);
-
- return (RET_SUCCESS);
-}
projects / apple / libc.git / blobdiff