db_185.h
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上传日期:2007-04-14
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- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1996, 1997, 1998, 1999, 2000
- * Sleepycat Software. All rights reserved.
- */
- /*
- * Copyright (c) 1990, 1993, 1994
- * 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. 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.
- *
- * $Id: db_185.h,v 11.4 2000/02/14 02:59:54 bostic Exp $
- */
- #ifndef _DB_185_H_
- #define _DB_185_H_
- #include <sys/types.h>
- #include <limits.h>
- /*
- * XXX
- * Handle function prototypes and the keyword "const". This steps on name
- * space that DB doesn't control, but all of the other solutions are worse.
- */
- #undef __P
- #if defined(__STDC__) || defined(__cplusplus)
- #define __P(protos) protos /* ANSI C prototypes */
- #else
- #define const
- #define __P(protos) () /* K&R C preprocessor */
- #endif
- #define RET_ERROR -1 /* Return values. */
- #define RET_SUCCESS 0
- #define RET_SPECIAL 1
- #ifndef __BIT_TYPES_DEFINED__
- #define __BIT_TYPES_DEFINED__
- @u_int8_decl@
- @int16_decl@
- @u_int16_decl@
- @int32_decl@
- @u_int32_decl@
- #endif
- /*
- * XXX
- * SGI/IRIX already has a pgno_t.
- */
- #ifdef sgi
- #define pgno_t db_pgno_t
- #endif
- #define MAX_PAGE_NUMBER 0xffffffff /* >= # of pages in a file */
- typedef u_int32_t pgno_t;
- #define MAX_PAGE_OFFSET 65535 /* >= # of bytes in a page */
- typedef u_int16_t indx_t;
- #define MAX_REC_NUMBER 0xffffffff /* >= # of records in a tree */
- typedef u_int32_t recno_t;
- /* Key/data structure -- a Data-Base Thang. */
- typedef struct {
- void *data; /* data */
- size_t size; /* data length */
- } DBT;
- /* Routine flags. */
- #define R_CURSOR 1 /* del, put, seq */
- #define __R_UNUSED 2 /* UNUSED */
- #define R_FIRST 3 /* seq */
- #define R_IAFTER 4 /* put (RECNO) */
- #define R_IBEFORE 5 /* put (RECNO) */
- #define R_LAST 6 /* seq (BTREE, RECNO) */
- #define R_NEXT 7 /* seq */
- #define R_NOOVERWRITE 8 /* put */
- #define R_PREV 9 /* seq (BTREE, RECNO) */
- #define R_SETCURSOR 10 /* put (RECNO) */
- #define R_RECNOSYNC 11 /* sync (RECNO) */
- typedef enum { DB_BTREE, DB_HASH, DB_RECNO } DBTYPE;
- /* Access method description structure. */
- typedef struct __db {
- DBTYPE type; /* Underlying db type. */
- int (*close) __P((struct __db *));
- int (*del) __P((const struct __db *, const DBT *, u_int));
- int (*get) __P((const struct __db *, const DBT *, DBT *, u_int));
- int (*put) __P((const struct __db *, DBT *, const DBT *, u_int));
- int (*seq) __P((const struct __db *, DBT *, DBT *, u_int));
- int (*sync) __P((const struct __db *, u_int));
- void *internal; /* Access method private. */
- int (*fd) __P((const struct __db *));
- } DB;
- #define BTREEMAGIC 0x053162
- #define BTREEVERSION 3
- /* Structure used to pass parameters to the btree routines. */
- typedef struct {
- #define R_DUP 0x01 /* duplicate keys */
- u_int32_t flags;
- u_int32_t cachesize; /* bytes to cache */
- u_int32_t maxkeypage; /* maximum keys per page */
- u_int32_t minkeypage; /* minimum keys per page */
- u_int32_t psize; /* page size */
- int (*compare) /* comparison function */
- __P((const DBT *, const DBT *));
- size_t (*prefix) /* prefix function */
- __P((const DBT *, const DBT *));
- int lorder; /* byte order */
- } BTREEINFO;
- #define HASHMAGIC 0x061561
- #define HASHVERSION 2
- /* Structure used to pass parameters to the hashing routines. */
- typedef struct {
- u_int32_t bsize; /* bucket size */
- u_int32_t ffactor; /* fill factor */
- u_int32_t nelem; /* number of elements */
- u_int32_t cachesize; /* bytes to cache */
- u_int32_t /* hash function */
- (*hash) __P((const void *, size_t));
- int lorder; /* byte order */
- } HASHINFO;
- /* Structure used to pass parameters to the record routines. */
- typedef struct {
- #define R_FIXEDLEN 0x01 /* fixed-length records */
- #define R_NOKEY 0x02 /* key not required */
- #define R_SNAPSHOT 0x04 /* snapshot the input */
- u_int32_t flags;
- u_int32_t cachesize; /* bytes to cache */
- u_int32_t psize; /* page size */
- int lorder; /* byte order */
- size_t reclen; /* record length (fixed-length records) */
- u_char bval; /* delimiting byte (variable-length records */
- char *bfname; /* btree file name */
- } RECNOINFO;
- #if defined(__cplusplus)
- extern "C" {
- #endif
- #define dbopen __db185_open
- DB *__db185_open __P((const char *, int, int, DBTYPE, const void *));
- #if defined(__cplusplus)
- }
- #endif
- #endif /* !_DB_185_H_ */