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- /*-
- * Copyright (c) 1990 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.
- *
- * @(#)db.h 5.10 (Berkeley) 4/2/91
- */
-
- #ifndef _DB_H_
- #define _DB_H_
-
- #include <sys/cdefs.h>
-
- /* flags for DB.put() call */
- #define R_IBEFORE 1 /* RECNO */
- #define R_IAFTER 2 /* RECNO */
- #define R_NOOVERWRITE 3 /* BTREE, HASH, RECNO */
- #define R_PUT 4 /* BTREE, HASH, RECNO */
-
- /* flags for DB.seq() call */
- #define R_CURSOR 1 /* BTREE, RECNO */
- #define R_FIRST 2 /* BTREE, HASH, RECNO */
- #define R_LAST 3 /* BTREE, RECNO */
- #define R_NEXT 4 /* BTREE, HASH, RECNO */
- #define R_PREV 5 /* BTREE, RECNO */
-
- /* key/data structure -- a data-base thang */
- typedef struct {
- void *data;
- int size;
- } DBT;
-
- /* access method description structure */
- typedef struct __db {
- void *internal; /* access method private */
- #define DB_BTREE 1
- #define DB_HASH 2
- #define DB_RECNO 3
- int type; /* type of underlying db */
- int (*close) __P((const struct __db *));
- int (*del) __P((const struct __db *, const DBT *, unsigned int));
- int (*get) __P((const struct __db *, DBT *, DBT *, unsigned int));
- int (*put) __P((const struct __db *, const DBT *, const DBT *,
- unsigned int));
- int (*seq) __P((const struct __db *, DBT *, DBT *, unsigned int));
- int (*sync) __P((const struct __db *));
- } DB;
-
- #define BTREEMAGIC 0x053162
- #define BTREEVERSION 2
-
- /* structure used to pass parameters to the btree routines */
- typedef struct {
- #define R_DUP 0x01 /* duplicate keys */
- u_long flags;
- int cachesize; /* bytes to cache */
- int psize; /* page size */
- int (*compare)(); /* compare function */
- int lorder; /* byte order */
- } BTREEINFO;
-
- #define HASHMAGIC 0x061561
- #define HASHVERSION 1
-
- /* structure used to pass parameters to the hashing routines */
- typedef struct {
- int bsize; /* bucket size */
- int ffactor; /* fill factor */
- int nelem; /* number of elements */
- int cachesize; /* bytes to cache */
- int (*hash)(); /* hash function */
- int lorder; /* byte order */
- } HASHINFO;
-
- /* structure used to pass parameters to the record routines */
- typedef struct {
- #define R_FIXEDLEN 0x01 /* fixed-length records */
- u_long flags;
- int cachesize; /* bytes to cache */
- size_t reclen; /* record length (fixed-length records) */
- u_char bval; /* delimiting byte (variable-length records */
- } RECNOINFO;
-
- /* key structure for the record routines */
- typedef struct {
- u_long number;
- u_long offset;
- u_long length;
- #define R_LENGTH 0x01 /* length is valid */
- #define R_NUMBER 0x02 /* record number is valid */
- #define R_OFFSET 0x04 /* offset is valid */
- u_char valid;
- } RECNOKEY;
-
- /* Little endian <--> big endian long swap macros. */
- #define BLSWAP(a) { \
- u_long _tmp = a; \
- ((char *)&a)[0] = ((char *)&_tmp)[3]; \
- ((char *)&a)[1] = ((char *)&_tmp)[2]; \
- ((char *)&a)[2] = ((char *)&_tmp)[1]; \
- ((char *)&a)[3] = ((char *)&_tmp)[0]; \
- }
- #define BLSWAP_COPY(a,b) { \
- ((char *)&(b))[0] = ((char *)&(a))[3]; \
- ((char *)&(b))[1] = ((char *)&(a))[2]; \
- ((char *)&(b))[2] = ((char *)&(a))[1]; \
- ((char *)&(b))[3] = ((char *)&(a))[0]; \
- }
-
-
- /* Little endian <--> big endian short swap macros. */
- #define BSSWAP(a) { \
- u_short _tmp = a; \
- ((char *)&a)[0] = ((char *)&_tmp)[1]; \
- ((char *)&a)[1] = ((char *)&_tmp)[0]; \
- }
- #define BSSWAP_COPY(a,b) { \
- ((char *)&(b))[0] = ((char *)&(a))[1]; \
- ((char *)&(b))[1] = ((char *)&(a))[0]; \
- }
-
- __BEGIN_DECLS
- DB *btree_open
- __P((const char *, int, int, const BTREEINFO *));
- DB *hash_open
- __P((const char *, int, int, const HASHINFO *));
- DB *recno_open
- __P((const char *, int, int, const RECNOINFO *));
- __END_DECLS
-
- #endif /* !_DB_H_ */
-