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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996, 1997, 1998
* Sleepycat Software. All rights reserved.
*/
/*
* Copyright (c) 1990, 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*/
/*
* Copyright (c) 1990, 1993, 1994, 1995
* 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.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)db_conv.c 10.13 (Sleepycat) 4/26/98";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <errno.h>
#include <string.h>
#endif
#include "db_int.h"
#include "db_page.h"
#include "db_swap.h"
#include "db_am.h"
static int __db_convert __P((db_pgno_t, void *, size_t, int));
/*
* __db_pgin --
*
* PUBLIC: int __db_pgin __P((db_pgno_t, size_t, void *));
*/
int
__db_pgin(pg, pagesize, pp)
db_pgno_t pg;
size_t pagesize;
void *pp;
{
return (__db_convert(pg, pp, pagesize, 1));
}
/*
* __db_pgout --
*
* PUBLIC: int __db_pgout __P((db_pgno_t, size_t, void *));
*/
int
__db_pgout(pg, pagesize, pp)
db_pgno_t pg;
size_t pagesize;
void *pp;
{
return (__db_convert(pg, pp, pagesize, 0));
}
/*
* __db_convert --
* Actually convert a page.
*/
static int
__db_convert(pg, pp, pagesize, pgin)
db_pgno_t pg;
void *pp;
size_t pagesize;
int pgin;
{
BINTERNAL *bi;
BKEYDATA *bk;
BOVERFLOW *bo;
PAGE *h;
RINTERNAL *ri;
db_indx_t i, len, tmp;
u_int8_t *p, *end;
COMPQUIET(pg, 0);
h = pp;
if (pgin) {
M_32_SWAP(h->lsn.file);
M_32_SWAP(h->lsn.offset);
M_32_SWAP(h->pgno);
M_32_SWAP(h->prev_pgno);
M_32_SWAP(h->next_pgno);
M_16_SWAP(h->entries);
M_16_SWAP(h->hf_offset);
}
switch (h->type) {
case P_HASH:
for (i = 0; i < NUM_ENT(h); i++) {
if (pgin)
M_16_SWAP(h->inp[i]);
switch (HPAGE_TYPE(h, i)) {
case H_KEYDATA:
break;
case H_DUPLICATE:
len = LEN_HKEYDATA(h, pagesize, i);
p = HKEYDATA_DATA(P_ENTRY(h, i));
for (end = p + len; p < end;) {
if (pgin) {
P_16_SWAP(p);
memcpy(&tmp,
p, sizeof(db_indx_t));
p += sizeof(db_indx_t);
} else {
memcpy(&tmp,
p, sizeof(db_indx_t));
SWAP16(p);
}
p += tmp;
SWAP16(p);
}
break;
case H_OFFDUP:
p = HOFFPAGE_PGNO(P_ENTRY(h, i));
SWAP32(p); /* pgno */
break;
case H_OFFPAGE:
p = HOFFPAGE_PGNO(P_ENTRY(h, i));
SWAP32(p); /* pgno */
SWAP32(p); /* tlen */
break;
}
}
/*
* The offsets in the inp array are used to determine
* the size of entries on a page; therefore they
* cannot be converted until we've done all the
* entries.
*/
if (!pgin)
for (i = 0; i < NUM_ENT(h); i++)
M_16_SWAP(h->inp[i]);
break;
case P_LBTREE:
case P_LRECNO:
case P_DUPLICATE:
for (i = 0; i < NUM_ENT(h); i++) {
if (pgin)
M_16_SWAP(h->inp[i]);
bk = GET_BKEYDATA(h, i);
switch (B_TYPE(bk->type)) {
case B_KEYDATA:
M_16_SWAP(bk->len);
break;
case B_DUPLICATE:
case B_OVERFLOW:
bo = (BOVERFLOW *)bk;
M_32_SWAP(bo->pgno);
M_32_SWAP(bo->tlen);
break;
}
if (!pgin)
M_16_SWAP(h->inp[i]);
}
break;
case P_IBTREE:
for (i = 0; i < NUM_ENT(h); i++) {
if (pgin)
M_16_SWAP(h->inp[i]);
bi = GET_BINTERNAL(h, i);
M_16_SWAP(bi->len);
M_32_SWAP(bi->pgno);
M_32_SWAP(bi->nrecs);
switch (B_TYPE(bi->type)) {
case B_KEYDATA:
break;
case B_DUPLICATE:
case B_OVERFLOW:
bo = (BOVERFLOW *)bi->data;
M_32_SWAP(bo->pgno);
M_32_SWAP(bo->tlen);
break;
}
if (!pgin)
M_16_SWAP(h->inp[i]);
}
break;
case P_IRECNO:
for (i = 0; i < NUM_ENT(h); i++) {
if (pgin)
M_16_SWAP(h->inp[i]);
ri = GET_RINTERNAL(h, i);
M_32_SWAP(ri->pgno);
M_32_SWAP(ri->nrecs);
if (!pgin)
M_16_SWAP(h->inp[i]);
}
break;
case P_OVERFLOW:
case P_INVALID:
/* Nothing to do. */
break;
default:
return (EINVAL);
}
if (!pgin) {
/* Swap the header information. */
M_32_SWAP(h->lsn.file);
M_32_SWAP(h->lsn.offset);
M_32_SWAP(h->pgno);
M_32_SWAP(h->prev_pgno);
M_32_SWAP(h->next_pgno);
M_16_SWAP(h->entries);
M_16_SWAP(h->hf_offset);
}
return (0);
}
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