diff options
Diffstat (limited to 'storage/bdb/btree/bt_conv.c')
-rw-r--r-- | storage/bdb/btree/bt_conv.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/storage/bdb/btree/bt_conv.c b/storage/bdb/btree/bt_conv.c new file mode 100644 index 00000000000..4264b62ffdd --- /dev/null +++ b/storage/bdb/btree/bt_conv.c @@ -0,0 +1,102 @@ +/*- + * See the file LICENSE for redistribution information. + * + * Copyright (c) 1996-2002 + * Sleepycat Software. All rights reserved. + */ + +#include "db_config.h" + +#ifndef lint +static const char revid[] = "$Id: bt_conv.c,v 11.13 2002/08/06 06:11:12 bostic Exp $"; +#endif /* not lint */ + +#ifndef NO_SYSTEM_INCLUDES +#include <sys/types.h> +#endif + +#include "db_int.h" +#include "dbinc/db_page.h" +#include "dbinc/db_swap.h" +#include "dbinc/btree.h" + +/* + * __bam_pgin -- + * Convert host-specific page layout from the host-independent format + * stored on disk. + * + * PUBLIC: int __bam_pgin __P((DB_ENV *, DB *, db_pgno_t, void *, DBT *)); + */ +int +__bam_pgin(dbenv, dummydbp, pg, pp, cookie) + DB_ENV *dbenv; + DB *dummydbp; + db_pgno_t pg; + void *pp; + DBT *cookie; +{ + DB_PGINFO *pginfo; + PAGE *h; + + pginfo = (DB_PGINFO *)cookie->data; + if (!F_ISSET(pginfo, DB_AM_SWAP)) + return (0); + + h = pp; + return (TYPE(h) == P_BTREEMETA ? __bam_mswap(pp) : + __db_byteswap(dbenv, dummydbp, pg, pp, pginfo->db_pagesize, 1)); +} + +/* + * __bam_pgout -- + * Convert host-specific page layout to the host-independent format + * stored on disk. + * + * PUBLIC: int __bam_pgout __P((DB_ENV *, DB *, db_pgno_t, void *, DBT *)); + */ +int +__bam_pgout(dbenv, dummydbp, pg, pp, cookie) + DB_ENV *dbenv; + DB *dummydbp; + db_pgno_t pg; + void *pp; + DBT *cookie; +{ + DB_PGINFO *pginfo; + PAGE *h; + + pginfo = (DB_PGINFO *)cookie->data; + if (!F_ISSET(pginfo, DB_AM_SWAP)) + return (0); + + h = pp; + return (TYPE(h) == P_BTREEMETA ? __bam_mswap(pp) : + __db_byteswap(dbenv, dummydbp, pg, pp, pginfo->db_pagesize, 0)); +} + +/* + * __bam_mswap -- + * Swap the bytes on the btree metadata page. + * + * PUBLIC: int __bam_mswap __P((PAGE *)); + */ +int +__bam_mswap(pg) + PAGE *pg; +{ + u_int8_t *p; + + __db_metaswap(pg); + + p = (u_int8_t *)pg + sizeof(DBMETA); + + SWAP32(p); /* maxkey */ + SWAP32(p); /* minkey */ + SWAP32(p); /* re_len */ + SWAP32(p); /* re_pad */ + SWAP32(p); /* root */ + p += 92 * sizeof(u_int32_t); /* unused */ + SWAP32(p); /* crypto_magic */ + + return (0); +} |