1*0Sstevel@tonic-gate /*-
2*0Sstevel@tonic-gate * See the file LICENSE for redistribution information.
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * Copyright (c) 1996, 1997, 1998
5*0Sstevel@tonic-gate * Sleepycat Software. All rights reserved.
6*0Sstevel@tonic-gate */
7*0Sstevel@tonic-gate
8*0Sstevel@tonic-gate #include "config.h"
9*0Sstevel@tonic-gate
10*0Sstevel@tonic-gate #ifndef lint
11*0Sstevel@tonic-gate static const char sccsid[] = "@(#)bt_conv.c 10.7 (Sleepycat) 9/20/98";
12*0Sstevel@tonic-gate #endif /* not lint */
13*0Sstevel@tonic-gate
14*0Sstevel@tonic-gate #ifndef NO_SYSTEM_INCLUDES
15*0Sstevel@tonic-gate #include <sys/types.h>
16*0Sstevel@tonic-gate #endif
17*0Sstevel@tonic-gate
18*0Sstevel@tonic-gate #include "db_int.h"
19*0Sstevel@tonic-gate #include "db_page.h"
20*0Sstevel@tonic-gate #include "db_swap.h"
21*0Sstevel@tonic-gate #include "btree.h"
22*0Sstevel@tonic-gate
23*0Sstevel@tonic-gate /*
24*0Sstevel@tonic-gate * __bam_pgin --
25*0Sstevel@tonic-gate * Convert host-specific page layout from the host-independent format
26*0Sstevel@tonic-gate * stored on disk.
27*0Sstevel@tonic-gate *
28*0Sstevel@tonic-gate * PUBLIC: int __bam_pgin __P((db_pgno_t, void *, DBT *));
29*0Sstevel@tonic-gate */
30*0Sstevel@tonic-gate int
__bam_pgin(pg,pp,cookie)31*0Sstevel@tonic-gate __bam_pgin(pg, pp, cookie)
32*0Sstevel@tonic-gate db_pgno_t pg;
33*0Sstevel@tonic-gate void *pp;
34*0Sstevel@tonic-gate DBT *cookie;
35*0Sstevel@tonic-gate {
36*0Sstevel@tonic-gate DB_PGINFO *pginfo;
37*0Sstevel@tonic-gate
38*0Sstevel@tonic-gate pginfo = (DB_PGINFO *)cookie->data;
39*0Sstevel@tonic-gate if (!pginfo->needswap)
40*0Sstevel@tonic-gate return (0);
41*0Sstevel@tonic-gate return (pg == PGNO_METADATA ?
42*0Sstevel@tonic-gate __bam_mswap(pp) : __db_pgin(pg, pginfo->db_pagesize, pp));
43*0Sstevel@tonic-gate }
44*0Sstevel@tonic-gate
45*0Sstevel@tonic-gate /*
46*0Sstevel@tonic-gate * __bam_pgout --
47*0Sstevel@tonic-gate * Convert host-specific page layout to the host-independent format
48*0Sstevel@tonic-gate * stored on disk.
49*0Sstevel@tonic-gate *
50*0Sstevel@tonic-gate * PUBLIC: int __bam_pgout __P((db_pgno_t, void *, DBT *));
51*0Sstevel@tonic-gate */
52*0Sstevel@tonic-gate int
__bam_pgout(pg,pp,cookie)53*0Sstevel@tonic-gate __bam_pgout(pg, pp, cookie)
54*0Sstevel@tonic-gate db_pgno_t pg;
55*0Sstevel@tonic-gate void *pp;
56*0Sstevel@tonic-gate DBT *cookie;
57*0Sstevel@tonic-gate {
58*0Sstevel@tonic-gate DB_PGINFO *pginfo;
59*0Sstevel@tonic-gate
60*0Sstevel@tonic-gate pginfo = (DB_PGINFO *)cookie->data;
61*0Sstevel@tonic-gate if (!pginfo->needswap)
62*0Sstevel@tonic-gate return (0);
63*0Sstevel@tonic-gate return (pg == PGNO_METADATA ?
64*0Sstevel@tonic-gate __bam_mswap(pp) : __db_pgout(pg, pginfo->db_pagesize, pp));
65*0Sstevel@tonic-gate }
66*0Sstevel@tonic-gate
67*0Sstevel@tonic-gate /*
68*0Sstevel@tonic-gate * __bam_mswap --
69*0Sstevel@tonic-gate * Swap the bytes on the btree metadata page.
70*0Sstevel@tonic-gate *
71*0Sstevel@tonic-gate * PUBLIC: int __bam_mswap __P((PAGE *));
72*0Sstevel@tonic-gate */
73*0Sstevel@tonic-gate int
__bam_mswap(pg)74*0Sstevel@tonic-gate __bam_mswap(pg)
75*0Sstevel@tonic-gate PAGE *pg;
76*0Sstevel@tonic-gate {
77*0Sstevel@tonic-gate u_int8_t *p;
78*0Sstevel@tonic-gate
79*0Sstevel@tonic-gate p = (u_int8_t *)pg;
80*0Sstevel@tonic-gate
81*0Sstevel@tonic-gate /* Swap the meta-data information. */
82*0Sstevel@tonic-gate SWAP32(p); /* lsn.file */
83*0Sstevel@tonic-gate SWAP32(p); /* lsn.offset */
84*0Sstevel@tonic-gate SWAP32(p); /* pgno */
85*0Sstevel@tonic-gate SWAP32(p); /* magic */
86*0Sstevel@tonic-gate SWAP32(p); /* version */
87*0Sstevel@tonic-gate SWAP32(p); /* pagesize */
88*0Sstevel@tonic-gate SWAP32(p); /* maxkey */
89*0Sstevel@tonic-gate SWAP32(p); /* minkey */
90*0Sstevel@tonic-gate SWAP32(p); /* free */
91*0Sstevel@tonic-gate SWAP32(p); /* flags */
92*0Sstevel@tonic-gate
93*0Sstevel@tonic-gate return (0);
94*0Sstevel@tonic-gate }
95