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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996-2003
* Sleepycat Software. All rights reserved.
*/
#include "db_config.h"
#ifndef lint
static const char copyright[] =
"Copyright (c) 1996-2003\nSleepycat Software Inc. All rights reserved.\n";
static const char revid[] =
"$Id: db185.c,v 11.33 2003/05/05 19:54:58 bostic Exp $";
#endif
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <fcntl.h>
#include <string.h>
#endif
#include "db_int.h"
#include "db185_int.h"
static int db185_close __P((DB185 *));
static int db185_compare __P((DB *, const DBT *, const DBT *));
static int db185_del __P((const DB185 *, const DBT185 *, u_int));
static int db185_fd __P((const DB185 *));
static int db185_get __P((const DB185 *, const DBT185 *, DBT185 *, u_int));
static u_int32_t
db185_hash __P((DB *, const void *, u_int32_t));
static size_t db185_prefix __P((DB *, const DBT *, const DBT *));
static int db185_put __P((const DB185 *, DBT185 *, const DBT185 *, u_int));
static int db185_seq __P((const DB185 *, DBT185 *, DBT185 *, u_int));
static int db185_sync __P((const DB185 *, u_int));
/*
* EXTERN: #ifdef _DB185_INT_H_
* EXTERN: DB185 *__db185_open
* EXTERN: __P((const char *, int, int, DBTYPE, const void *));
* EXTERN: #else
* EXTERN: DB *__db185_open
* EXTERN: __P((const char *, int, int, DBTYPE, const void *));
* EXTERN: #endif
*/
DB185 *
__db185_open(file, oflags, mode, type, openinfo)
const char *file;
int oflags, mode;
DBTYPE type;
const void *openinfo;
{
const BTREEINFO *bi;
const HASHINFO *hi;
const RECNOINFO *ri;
DB *dbp;
DB185 *db185p;
DB_FH *fhp;
int ret;
dbp = NULL;
db185p = NULL;
if ((ret = db_create(&dbp, NULL, 0)) != 0)
goto err;
if ((ret = __os_calloc(NULL, 1, sizeof(DB185), &db185p)) != 0)
goto err;
/*
* !!!
* The DBTYPE enum wasn't initialized in DB 185, so it's off-by-one
* from DB 2.0.
*/
switch (type) {
case 0: /* DB_BTREE */
type = DB_BTREE;
if ((bi = openinfo) != NULL) {
if (bi->flags & ~R_DUP)
goto einval;
if (bi->flags & R_DUP)
(void)dbp->set_flags(dbp, DB_DUP);
if (bi->cachesize != 0)
(void)dbp->set_cachesize
(dbp, 0, bi->cachesize, 0);
if (bi->minkeypage != 0)
(void)dbp->set_bt_minkey(dbp, bi->minkeypage);
if (bi->psize != 0)
(void)dbp->set_pagesize(dbp, bi->psize);
/*
* !!!
* Comparisons and prefix calls work because the DBT
* structures in 1.85 and 2.0 have the same initial
* fields.
*/
if (bi->prefix != NULL) {
db185p->prefix = bi->prefix;
dbp->set_bt_prefix(dbp, db185_prefix);
}
if (bi->compare != NULL) {
db185p->compare = bi->compare;
dbp->set_bt_compare(dbp, db185_compare);
}
if (bi->lorder != 0)
dbp->set_lorder(dbp, bi->lorder);
}
break;
case 1: /* DB_HASH */
type = DB_HASH;
if ((hi = openinfo) != NULL) {
if (hi->bsize != 0)
(void)dbp->set_pagesize(dbp, hi->bsize);
if (hi->ffactor != 0)
(void)dbp->set_h_ffactor(dbp, hi->ffactor);
if (hi->nelem != 0)
(void)dbp->set_h_nelem(dbp, hi->nelem);
if (hi->cachesize != 0)
(void)dbp->set_cachesize
(dbp, 0, hi->cachesize, 0);
if (hi->hash != NULL) {
db185p->hash = hi->hash;
(void)dbp->set_h_hash(dbp, db185_hash);
}
if (hi->lorder != 0)
dbp->set_lorder(dbp, hi->lorder);
}
break;
case 2: /* DB_RECNO */
type = DB_RECNO;
/* DB 1.85 did renumbering by default. */
(void)dbp->set_flags(dbp, DB_RENUMBER);
/*
* !!!
* The file name given to DB 1.85 recno is the name of the DB
* 2.0 backing file. If the file doesn't exist, create it if
* the user has the O_CREAT flag set, DB 1.85 did it for you,
* and DB 2.0 doesn't.
*
* !!!
* Setting the file name to NULL specifies that we're creating
* a temporary backing file, in DB 2.X. If we're opening the
* DB file read-only, change the flags to read-write, because
* temporary backing files cannot be opened read-only, and DB
* 2.X will return an error. We are cheating here -- if the
* application does a put on the database, it will succeed --
* although that would be a stupid thing for the application
* to do.
*
* !!!
* Note, the file name in DB 1.85 was a const -- we don't do
* that in DB 2.0, so do that cast.
*/
if (file != NULL) {
if (oflags & O_CREAT && __os_exists(file, NULL) != 0)
if (__os_openhandle(NULL, file,
oflags, mode, &fhp) == 0)
(void)__os_closehandle(NULL, fhp);
(void)dbp->set_re_source(dbp, file);
if (O_RDONLY)
oflags &= ~O_RDONLY;
oflags |= O_RDWR;
file = NULL;
}
if ((ri = openinfo) != NULL) {
/*
* !!!
* We can't support the bfname field.
*/
#define BFMSG \
"Berkeley DB: DB 1.85's recno bfname field is not supported.\n"
if (ri->bfname != NULL) {
dbp->errx(dbp, "%s", BFMSG);
goto einval;
}
if (ri->flags & ~(R_FIXEDLEN | R_NOKEY | R_SNAPSHOT))
goto einval;
if (ri->flags & R_FIXEDLEN) {
if (ri->bval != 0)
(void)dbp->set_re_pad(dbp, ri->bval);
if (ri->reclen != 0)
(void)dbp->set_re_len(dbp, ri->reclen);
} else
if (ri->bval != 0)
(void)dbp->set_re_delim(dbp, ri->bval);
/*
* !!!
* We ignore the R_NOKEY flag, but that's okay, it was
* only an optimization that was never implemented.
*/
if (ri->flags & R_SNAPSHOT)
(void)dbp->set_flags(dbp, DB_SNAPSHOT);
if (ri->cachesize != 0)
(void)dbp->set_cachesize
(dbp, 0, ri->cachesize, 0);
if (ri->psize != 0)
(void)dbp->set_pagesize(dbp, ri->psize);
if (ri->lorder != 0)
dbp->set_lorder(dbp, ri->lorder);
}
break;
default:
goto einval;
}
db185p->close = db185_close;
db185p->del = db185_del;
db185p->fd = db185_fd;
db185p->get = db185_get;
db185p->put = db185_put;
db185p->seq = db185_seq;
db185p->sync = db185_sync;
/*
* Store a reference so we can indirect from the DB 1.85 structure
* to the underlying DB structure, and vice-versa. This has to be
* done BEFORE the DB::open method call because the hash callback
* is exercised as part of hash database initialiation.
*/
db185p->dbp = dbp;
dbp->api_internal = db185p;
/* Open the database. */
if ((ret = dbp->open(dbp, NULL,
file, NULL, type, __db_oflags(oflags), mode)) != 0)
goto err;
/* Create the cursor used for sequential ops. */
if ((ret = dbp->cursor(dbp, NULL, &((DB185 *)db185p)->dbc, 0)) != 0)
goto err;
return (db185p);
einval: ret = EINVAL;
err: if (db185p != NULL)
__os_free(NULL, db185p);
if (dbp != NULL)
(void)dbp->close(dbp, 0);
__os_set_errno(ret);
return (NULL);
}
static int
db185_close(db185p)
DB185 *db185p;
{
DB *dbp;
int ret;
dbp = db185p->dbp;
ret = dbp->close(dbp, 0);
__os_free(NULL, db185p);
if (ret == 0)
return (0);
__os_set_errno(ret);
return (-1);
}
static int
db185_del(db185p, key185, flags)
const DB185 *db185p;
const DBT185 *key185;
u_int flags;
{
DB *dbp;
DBT key;
int ret;
dbp = db185p->dbp;
memset(&key, 0, sizeof(key));
key.data = key185->data;
key.size = key185->size;
if (flags & ~R_CURSOR)
goto einval;
if (flags & R_CURSOR)
ret = db185p->dbc->c_del(db185p->dbc, 0);
else
ret = dbp->del(dbp, NULL, &key, 0);
switch (ret) {
case 0:
return (0);
case DB_NOTFOUND:
return (1);
}
if (0) {
einval: ret = EINVAL;
}
__os_set_errno(ret);
return (-1);
}
static int
db185_fd(db185p)
const DB185 *db185p;
{
DB *dbp;
int fd, ret;
dbp = db185p->dbp;
if ((ret = dbp->fd(dbp, &fd)) == 0)
return (fd);
__os_set_errno(ret);
return (-1);
}
static int
db185_get(db185p, key185, data185, flags)
const DB185 *db185p;
const DBT185 *key185;
DBT185 *data185;
u_int flags;
{
DB *dbp;
DBT key, data;
int ret;
dbp = db185p->dbp;
memset(&key, 0, sizeof(key));
key.data = key185->data;
key.size = key185->size;
memset(&data, 0, sizeof(data));
data.data = data185->data;
data.size = data185->size;
if (flags)
goto einval;
switch (ret = dbp->get(dbp, NULL, &key, &data, 0)) {
case 0:
data185->data = data.data;
data185->size = data.size;
return (0);
case DB_NOTFOUND:
return (1);
}
if (0) {
einval: ret = EINVAL;
}
__os_set_errno(ret);
return (-1);
}
static int
db185_put(db185p, key185, data185, flags)
const DB185 *db185p;
DBT185 *key185;
const DBT185 *data185;
u_int flags;
{
DB *dbp;
DBC *dbcp_put;
DBT key, data;
int ret, t_ret;
dbp = db185p->dbp;
memset(&key, 0, sizeof(key));
key.data = key185->data;
key.size = key185->size;
memset(&data, 0, sizeof(data));
data.data = data185->data;
data.size = data185->size;
switch (flags) {
case 0:
ret = dbp->put(dbp, NULL, &key, &data, 0);
break;
case R_CURSOR:
ret = db185p->dbc->c_put(db185p->dbc, &key, &data, DB_CURRENT);
break;
case R_IAFTER:
case R_IBEFORE:
if (dbp->type != DB_RECNO)
goto einval;
if ((ret = dbp->cursor(dbp, NULL, &dbcp_put, 0)) != 0)
break;
if ((ret =
dbcp_put->c_get(dbcp_put, &key, &data, DB_SET)) == 0) {
memset(&data, 0, sizeof(data));
data.data = data185->data;
data.size = data185->size;
ret = dbcp_put->c_put(dbcp_put, &key, &data,
flags == R_IAFTER ? DB_AFTER : DB_BEFORE);
}
if ((t_ret = dbcp_put->c_close(dbcp_put)) != 0 && ret == 0)
ret = t_ret;
break;
case R_NOOVERWRITE:
ret = dbp->put(dbp, NULL, &key, &data, DB_NOOVERWRITE);
break;
case R_SETCURSOR:
if (dbp->type != DB_BTREE && dbp->type != DB_RECNO)
goto einval;
if ((ret = dbp->put(dbp, NULL, &key, &data, 0)) != 0)
break;
ret =
db185p->dbc->c_get(db185p->dbc, &key, &data, DB_SET_RANGE);
break;
default:
goto einval;
}
switch (ret) {
case 0:
key185->data = key.data;
key185->size = key.size;
return (0);
case DB_KEYEXIST:
return (1);
}
if (0) {
einval: ret = EINVAL;
}
__os_set_errno(ret);
return (-1);
}
static int
db185_seq(db185p, key185, data185, flags)
const DB185 *db185p;
DBT185 *key185, *data185;
u_int flags;
{
DB *dbp;
DBT key, data;
int ret;
dbp = db185p->dbp;
memset(&key, 0, sizeof(key));
key.data = key185->data;
key.size = key185->size;
memset(&data, 0, sizeof(data));
data.data = data185->data;
data.size = data185->size;
switch (flags) {
case R_CURSOR:
flags = DB_SET_RANGE;
break;
case R_FIRST:
flags = DB_FIRST;
break;
case R_LAST:
if (dbp->type != DB_BTREE && dbp->type != DB_RECNO)
goto einval;
flags = DB_LAST;
break;
case R_NEXT:
flags = DB_NEXT;
break;
case R_PREV:
if (dbp->type != DB_BTREE && dbp->type != DB_RECNO)
goto einval;
flags = DB_PREV;
break;
default:
goto einval;
}
switch (ret = db185p->dbc->c_get(db185p->dbc, &key, &data, flags)) {
case 0:
key185->data = key.data;
key185->size = key.size;
data185->data = data.data;
data185->size = data.size;
return (0);
case DB_NOTFOUND:
return (1);
}
if (0) {
einval: ret = EINVAL;
}
__os_set_errno(ret);
return (-1);
}
static int
db185_sync(db185p, flags)
const DB185 *db185p;
u_int flags;
{
DB *dbp;
int ret;
dbp = db185p->dbp;
switch (flags) {
case 0:
break;
case R_RECNOSYNC:
/*
* !!!
* We can't support the R_RECNOSYNC flag.
*/
#define RSMSG \
"Berkeley DB: DB 1.85's R_RECNOSYNC sync flag is not supported.\n"
dbp->errx(dbp, "%s", RSMSG);
/* FALLTHROUGH */
default:
goto einval;
}
if ((ret = dbp->sync(dbp, 0)) == 0)
return (0);
if (0) {
einval: ret = EINVAL;
}
__os_set_errno(ret);
return (-1);
}
/*
* db185_compare --
* Cutout routine to call the user's Btree comparison function.
*/
static int
db185_compare(dbp, a, b)
DB *dbp;
const DBT *a, *b;
{
return (((DB185 *)dbp->api_internal)->compare(a, b));
}
/*
* db185_prefix --
* Cutout routine to call the user's Btree prefix function.
*/
static size_t
db185_prefix(dbp, a, b)
DB *dbp;
const DBT *a, *b;
{
return (((DB185 *)dbp->api_internal)->prefix(a, b));
}
/*
* db185_hash --
* Cutout routine to call the user's hash function.
*/
static u_int32_t
db185_hash(dbp, key, len)
DB *dbp;
const void *key;
u_int32_t len;
{
return (((DB185 *)dbp->api_internal)->hash(key, (size_t)len));
}
|