8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
277 lines
7.0 KiB
C
277 lines
7.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1990, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)rec_put.c 8.7 (Berkeley) 8/18/94";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <db.h>
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#include "recno.h"
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/*
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* __REC_PUT -- Add a recno item to the tree.
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*
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* Parameters:
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* dbp: pointer to access method
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* key: key
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* data: data
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* flag: R_CURSOR, R_IAFTER, R_IBEFORE, R_NOOVERWRITE
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*
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* Returns:
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* RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key is
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* already in the tree and R_NOOVERWRITE specified.
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*/
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int
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__rec_put(const DB *dbp, DBT *key, const DBT *data, u_int flags)
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{
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BTREE *t;
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DBT fdata, tdata;
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recno_t nrec;
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int status;
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t = dbp->internal;
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/* Toss any page pinned across calls. */
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if (t->bt_pinned != NULL) {
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mpool_put(t->bt_mp, t->bt_pinned, 0);
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t->bt_pinned = NULL;
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}
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/*
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* If using fixed-length records, and the record is long, return
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* EINVAL. If it's short, pad it out. Use the record data return
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* memory, it's only short-term.
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*/
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if (F_ISSET(t, R_FIXLEN) && data->size != t->bt_reclen) {
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if (data->size > t->bt_reclen)
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goto einval;
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if (t->bt_rdata.size < t->bt_reclen) {
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t->bt_rdata.data =
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reallocf(t->bt_rdata.data, t->bt_reclen);
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if (t->bt_rdata.data == NULL)
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return (RET_ERROR);
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t->bt_rdata.size = t->bt_reclen;
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}
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memmove(t->bt_rdata.data, data->data, data->size);
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memset((char *)t->bt_rdata.data + data->size,
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t->bt_bval, t->bt_reclen - data->size);
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fdata.data = t->bt_rdata.data;
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fdata.size = t->bt_reclen;
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} else {
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fdata.data = data->data;
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fdata.size = data->size;
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}
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switch (flags) {
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case R_CURSOR:
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if (!F_ISSET(&t->bt_cursor, CURS_INIT))
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goto einval;
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nrec = t->bt_cursor.rcursor;
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break;
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case R_SETCURSOR:
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if ((nrec = *(recno_t *)key->data) == 0)
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goto einval;
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break;
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case R_IAFTER:
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if ((nrec = *(recno_t *)key->data) == 0) {
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nrec = 1;
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flags = R_IBEFORE;
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}
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break;
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case 0:
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case R_IBEFORE:
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if ((nrec = *(recno_t *)key->data) == 0)
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goto einval;
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break;
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case R_NOOVERWRITE:
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if ((nrec = *(recno_t *)key->data) == 0)
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goto einval;
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if (nrec <= t->bt_nrecs)
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return (RET_SPECIAL);
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break;
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default:
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einval: errno = EINVAL;
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return (RET_ERROR);
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}
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/*
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* Make sure that records up to and including the put record are
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* already in the database. If skipping records, create empty ones.
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*/
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if (nrec > t->bt_nrecs) {
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if (!F_ISSET(t, R_EOF | R_INMEM) &&
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t->bt_irec(t, nrec) == RET_ERROR)
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return (RET_ERROR);
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if (nrec > t->bt_nrecs + 1) {
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if (F_ISSET(t, R_FIXLEN)) {
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if ((tdata.data = malloc(t->bt_reclen)) == NULL)
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return (RET_ERROR);
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tdata.size = t->bt_reclen;
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memset(tdata.data, t->bt_bval, tdata.size);
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} else {
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tdata.data = NULL;
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tdata.size = 0;
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}
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while (nrec > t->bt_nrecs + 1)
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if (__rec_iput(t,
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t->bt_nrecs, &tdata, 0) != RET_SUCCESS)
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return (RET_ERROR);
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if (F_ISSET(t, R_FIXLEN))
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free(tdata.data);
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}
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}
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if ((status = __rec_iput(t, nrec - 1, &fdata, flags)) != RET_SUCCESS)
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return (status);
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switch (flags) {
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case R_IAFTER:
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nrec++;
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break;
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case R_SETCURSOR:
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t->bt_cursor.rcursor = nrec;
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break;
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}
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F_SET(t, R_MODIFIED);
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return (__rec_ret(t, NULL, nrec, key, NULL));
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}
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/*
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* __REC_IPUT -- Add a recno item to the tree.
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*
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* Parameters:
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* t: tree
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* nrec: record number
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* data: data
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*
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* Returns:
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* RET_ERROR, RET_SUCCESS
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*/
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int
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__rec_iput(BTREE *t, recno_t nrec, const DBT *data, u_int flags)
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{
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DBT tdata;
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EPG *e;
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PAGE *h;
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indx_t idx, nxtindex;
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pgno_t pg;
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u_int32_t nbytes;
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int dflags, status;
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char *dest, db[NOVFLSIZE];
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/*
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* If the data won't fit on a page, store it on indirect pages.
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*
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* XXX
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* If the insert fails later on, these pages aren't recovered.
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*/
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if (data->size > t->bt_ovflsize) {
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if (__ovfl_put(t, data, &pg) == RET_ERROR)
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return (RET_ERROR);
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tdata.data = db;
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tdata.size = NOVFLSIZE;
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memcpy(db, &pg, sizeof(pg));
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*(u_int32_t *)(db + sizeof(pgno_t)) = data->size;
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dflags = P_BIGDATA;
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data = &tdata;
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} else
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dflags = 0;
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/* __rec_search pins the returned page. */
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if ((e = __rec_search(t, nrec,
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nrec > t->bt_nrecs || flags == R_IAFTER || flags == R_IBEFORE ?
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SINSERT : SEARCH)) == NULL)
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return (RET_ERROR);
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h = e->page;
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idx = e->index;
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/*
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* Add the specified key/data pair to the tree. The R_IAFTER and
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* R_IBEFORE flags insert the key after/before the specified key.
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*
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* Pages are split as required.
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*/
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switch (flags) {
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case R_IAFTER:
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++idx;
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break;
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case R_IBEFORE:
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break;
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default:
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if (nrec < t->bt_nrecs &&
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__rec_dleaf(t, h, idx) == RET_ERROR) {
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mpool_put(t->bt_mp, h, 0);
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return (RET_ERROR);
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}
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break;
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}
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/*
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* If not enough room, split the page. The split code will insert
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* the key and data and unpin the current page. If inserting into
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* the offset array, shift the pointers up.
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*/
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nbytes = NRLEAFDBT(data->size);
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if ((u_int32_t)(h->upper - h->lower) < nbytes + sizeof(indx_t)) {
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status = __bt_split(t, h, NULL, data, dflags, nbytes, idx);
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if (status == RET_SUCCESS)
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++t->bt_nrecs;
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return (status);
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}
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if (idx < (nxtindex = NEXTINDEX(h)))
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memmove(h->linp + idx + 1, h->linp + idx,
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(nxtindex - idx) * sizeof(indx_t));
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h->lower += sizeof(indx_t);
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h->linp[idx] = h->upper -= nbytes;
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dest = (char *)h + h->upper;
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WR_RLEAF(dest, data, dflags);
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++t->bt_nrecs;
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F_SET(t, B_MODIFIED);
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mpool_put(t->bt_mp, h, MPOOL_DIRTY);
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return (RET_SUCCESS);
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}
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