diff options
Diffstat (limited to 'debian/htdig/htdig-3.2.0b6/db/bt_upgrade.c')
| -rw-r--r-- | debian/htdig/htdig-3.2.0b6/db/bt_upgrade.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/debian/htdig/htdig-3.2.0b6/db/bt_upgrade.c b/debian/htdig/htdig-3.2.0b6/db/bt_upgrade.c new file mode 100644 index 00000000..7e6a9dd3 --- /dev/null +++ b/debian/htdig/htdig-3.2.0b6/db/bt_upgrade.c @@ -0,0 +1,167 @@ +/*- + * See the file LICENSE for redistribution information. + * + * Copyright (c) 1996, 1997, 1998, 1999 + * Sleepycat Software. All rights reserved. + */ +#include "db_config.h" + +#ifndef lint +static const char sccsid[] = "@(#)bt_upgrade.c 11.5 (Sleepycat) 10/20/99"; +#endif /* not lint */ + +#ifndef NO_SYSTEM_INCLUDES +#include <sys/types.h> + +#include <errno.h> +#include <limits.h> +#include <string.h> +#endif + +#include "db_int.h" +#include "db_page.h" +#include "db_swap.h" +#include "btree.h" +#include "db_am.h" + +static int CDB___bam_upgrade6 __P((DB *, int, char *, DB_FH *)); + +/* + * CDB___bam_upgrade -- + * Upgrade Btree databases. + * + * PUBLIC: int CDB___bam_upgrade __P((DB *, int, char *, DB_FH *, char *)); + */ +int +CDB___bam_upgrade(dbp, swapped, real_name, fhp, mbuf) + DB *dbp; + int swapped; + char *real_name, *mbuf; + DB_FH *fhp; +{ + DB_ENV *dbenv; + int ret; + + dbenv = dbp->dbenv; + + /* Check the version. */ + switch (((DBMETA *)mbuf)->version) { + case 6: + if ((ret = CDB___bam_upgrade6(dbp, swapped, real_name, fhp)) != 0) + return (ret); + /* FALLTHROUGH */ + case 7: + break; + default: + CDB___db_err(dbenv, "%s: unsupported btree version: %lu", + real_name, (u_long)((DBMETA *)mbuf)->version); + return (DB_OLD_VERSION); + } + return (0); +} + +/* + * CDB___bam_upgrade6 -- + * Upgrade the database from version 6 to version 7. + */ +static int +CDB___bam_upgrade6(dbp, swapped, real_name, fhp) + DB *dbp; + int swapped; + char *real_name; + DB_FH *fhp; +{ + DB_ENV *dbenv; + ssize_t n; + u_int32_t tmp; + int ret; + u_int8_t buf[256], *p; + + dbenv = dbp->dbenv; + + if (dbp->db_feedback != NULL) + dbp->db_feedback(dbp, DB_UPGRADE, 0); + + /* + * Seek to the beginning of the file and read the metadata page. We + * read 256 bytes, which is larger than any access method's metadata + * page. + */ + if ((ret = CDB___os_seek(fhp, 0, 0, 0, 0, DB_OS_SEEK_SET)) != 0) + return (ret); + if ((ret = CDB___os_read(fhp, buf, sizeof(buf), &n)) != 0) + return (ret); + + /* + * Upgrade a Btree meta-data page. + * Version 6: byte range: Version 7: byte range: + * lsn 00-07 lsn 00-07 + * pgno 08-11 pgno 08-11 + * magic 12-15 magic 12-15 + * version 16-19 version 16-19 + * pagesize 20-23 pagesize 20-23 + * maxkey 24-27 unused 24 + * type 25 + * unused 26-27 + * minkey 28-31 free 28-31 + * free 32-35 flags 32-35 + * flags 36-39 uid 36-55 + * re_len 40-43 maxkey 56-59 + * re_pad 44-47 minkey 60-63 + * uid 48-63 re_len 64-67 + * re_pad 68-71 + * root 72-75 + */ + + /* + * We are going to create a new uid, so we can move the stuff + * at the end of the structure first, overwriting the uid. + */ + + /* 64-71 done: Move re_len and re_pad */ + memmove(buf + 64, buf + 40, 8); + + /* 56-63 done: Move maxkey and minkey */ + memmove(buf + 56, buf + 24, 8); + + /* 16-19 done: Update the version. */ + tmp = 7; + if (swapped) + M_32_SWAP(tmp); + memcpy(buf + 16, &tmp, sizeof(u_int32_t)); + + /* 0-23 done: Bytes 0-24 are unchanged. */ + p = buf + 24; + + /* 24-27 done: Add type. */ + *p++ = '\0'; + *p++ = P_BTREEMETA; + *p++ = '\0'; + *p = '\0'; + + /* 28-35 done: Move free and flags */ + memmove(buf + 28, buf + 32, 8); + + /* 36-55 done: Replace the unique ID. */ + if ((ret = CDB___os_fileid(dbenv, real_name, 1, buf + 36)) != 0) + return (ret); + + /* 72-75 done: Set the root page. */ + tmp = 1; + if (swapped) + M_32_SWAP(tmp); + memcpy(buf + 72, &tmp, sizeof(u_int32_t)); + + /* Write the metadata page out. */ + if ((ret = CDB___os_seek(fhp, 0, 0, 0, 1, DB_OS_SEEK_SET)) != 0) + return (ret); + if ((ret = CDB___os_write(fhp, buf, 128, &n)) != 0) + return (ret); + if ((ret = CDB___os_fsync(fhp)) != 0) + return (ret); + + if (dbp->db_feedback != NULL) + dbp->db_feedback(dbp, DB_UPGRADE, 100); + + return (0); +} |