| 1 | /*-
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| 2 | * Copyright (c) 1990, 1993, 1994
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| 3 | * The Regents of the University of California. All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | * 1. Redistributions of source code must retain the above copyright
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| 9 | * notice, this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer in the
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| 12 | * documentation and/or other materials provided with the distribution.
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| 13 | * 3. All advertising materials mentioning features or use of this software
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| 14 | * must display the following acknowledgement:
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| 15 | * This product includes software developed by the University of
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| 16 | * California, Berkeley and its contributors.
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| 17 | * 4. Neither the name of the University nor the names of its contributors
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| 18 | * may be used to endorse or promote products derived from this software
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| 19 | * without specific prior written permission.
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| 20 | *
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 31 | * SUCH DAMAGE.
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| 32 | *
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| 33 | * @(#)db.h 8.7 (Berkeley) 6/16/94
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| 34 | */
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| 35 |
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| 36 | #ifndef _DB_H_
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| 37 | #define _DB_H_
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| 38 |
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| 39 | #if defined (__cplusplus)
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| 40 | extern "C" {
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| 41 | #endif
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| 42 |
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| 43 | #include <sys/types.h>
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| 44 | #include <sys/cdefs.h>
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| 45 |
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| 46 | #include <limits.h>
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| 47 |
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| 48 | #ifdef __DBINTERFACE_PRIVATE
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| 49 | #include <compat.h>
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| 50 | #endif
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| 51 |
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| 52 | #define RET_ERROR -1 /* Return values. */
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| 53 | #define RET_SUCCESS 0
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| 54 | #define RET_SPECIAL 1
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| 55 |
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| 56 | #ifndef __BIT_TYPES_DEFINED__
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| 57 | #define __BIT_TYPES_DEFINED__
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| 58 | typedef __signed char int8_t;
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| 59 | typedef unsigned char u_int8_t;
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| 60 | typedef short int16_t;
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| 61 | typedef unsigned short u_int16_t;
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| 62 | typedef int int32_t;
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| 63 | typedef unsigned int u_int32_t;
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| 64 | #ifdef WE_DONT_NEED_QUADS
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| 65 | typedef long long int64_t;
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| 66 | typedef unsigned long long u_int64_t;
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| 67 | #endif
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| 68 | #endif
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| 69 |
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| 70 | #define MAX_PAGE_NUMBER 0xffffffff /* >= # of pages in a file */
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| 71 | typedef u_int32_t pgno_t;
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| 72 | #define MAX_PAGE_OFFSET 65535 /* >= # of bytes in a page */
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| 73 | typedef u_int16_t indx_t;
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| 74 | #define MAX_REC_NUMBER 0xffffffff /* >= # of records in a tree */
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| 75 | typedef u_int32_t recno_t;
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| 76 |
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| 77 | /* Key/data structure -- a Data-Base Thang. */
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| 78 | typedef struct {
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| 79 | void *data; /* data */
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| 80 | size_t size; /* data length */
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| 81 | } DBT;
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| 82 |
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| 83 | /* Routine flags. */
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| 84 | #define R_CURSOR 1 /* del, put, seq */
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| 85 | #define __R_UNUSED 2 /* UNUSED */
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| 86 | #define R_FIRST 3 /* seq */
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| 87 | #define R_IAFTER 4 /* put (RECNO) */
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| 88 | #define R_IBEFORE 5 /* put (RECNO) */
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| 89 | #define R_LAST 6 /* seq (BTREE, RECNO) */
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| 90 | #define R_NEXT 7 /* seq */
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| 91 | #define R_NOOVERWRITE 8 /* put */
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| 92 | #define R_PREV 9 /* seq (BTREE, RECNO) */
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| 93 | #define R_SETCURSOR 10 /* put (RECNO) */
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| 94 | #define R_RECNOSYNC 11 /* sync (RECNO) */
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| 95 |
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| 96 | typedef enum { DB_BTREE, DB_HASH, DB_RECNO } DBTYPE;
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| 97 |
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| 98 | /*
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| 99 | * !!!
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| 100 | * The following flags are included in the dbopen(3) call as part of the
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| 101 | * open(2) flags. In order to avoid conflicts with the open flags, start
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| 102 | * at the top of the 16 or 32-bit number space and work our way down. If
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| 103 | * the open flags were significantly expanded in the future, it could be
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| 104 | * a problem. Wish I'd left another flags word in the dbopen call.
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| 105 | *
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| 106 | * !!!
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| 107 | * None of this stuff is implemented yet. The only reason that it's here
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| 108 | * is so that the access methods can skip copying the key/data pair when
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| 109 | * the DB_LOCK flag isn't set.
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| 110 | */
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| 111 | #if UINT_MAX > 65535
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| 112 | #define DB_LOCK 0x20000000 /* Do locking. */
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| 113 | #define DB_SHMEM 0x40000000 /* Use shared memory. */
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| 114 | #define DB_TXN 0x80000000 /* Do transactions. */
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| 115 | #else
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| 116 | #define DB_LOCK 0x2000 /* Do locking. */
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| 117 | #define DB_SHMEM 0x4000 /* Use shared memory. */
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| 118 | #define DB_TXN 0x8000 /* Do transactions. */
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| 119 | #endif
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| 120 |
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| 121 | /* Access method description structure. */
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| 122 | typedef struct __db {
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| 123 | DBTYPE type; /* Underlying db type. */
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| 124 | int (*close) __P((struct __db *));
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| 125 | int (*del) __P((const struct __db *, const DBT *, u_int));
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| 126 | int (*get) __P((const struct __db *, const DBT *, DBT *, u_int));
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| 127 | int (*put) __P((const struct __db *, DBT *, const DBT *, u_int));
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| 128 | int (*seq) __P((const struct __db *, DBT *, DBT *, u_int));
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| 129 | int (*sync) __P((const struct __db *, u_int));
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| 130 | void *internal; /* Access method private. */
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| 131 | int (*fd) __P((const struct __db *));
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| 132 | } DB;
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| 133 |
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| 134 | #define BTREEMAGIC 0x053162
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| 135 | #define BTREEVERSION 3
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| 136 |
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| 137 | /* Structure used to pass parameters to the btree routines. */
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| 138 | typedef struct {
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| 139 | #define R_DUP 0x01 /* duplicate keys */
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| 140 | u_long flags;
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| 141 | u_int cachesize; /* bytes to cache */
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| 142 | int maxkeypage; /* maximum keys per page */
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| 143 | int minkeypage; /* minimum keys per page */
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| 144 | u_int psize; /* page size */
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| 145 | int (*compare) /* comparison function */
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| 146 | __P((const DBT *, const DBT *));
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| 147 | size_t (*prefix) /* prefix function */
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| 148 | __P((const DBT *, const DBT *));
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| 149 | int lorder; /* byte order */
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| 150 | } BTREEINFO;
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| 151 |
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| 152 | #define HASHMAGIC 0x061561
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| 153 | #define HASHVERSION 2
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| 154 |
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| 155 | /* Structure used to pass parameters to the hashing routines. */
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| 156 | typedef struct {
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| 157 | u_int bsize; /* bucket size */
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| 158 | u_int ffactor; /* fill factor */
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| 159 | u_int nelem; /* number of elements */
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| 160 | u_int cachesize; /* bytes to cache */
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| 161 | u_int32_t /* hash function */
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| 162 | (*hash) __P((const void *, size_t));
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| 163 | int lorder; /* byte order */
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| 164 | } HASHINFO;
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| 165 |
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| 166 | /* Structure used to pass parameters to the record routines. */
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| 167 | typedef struct {
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| 168 | #define R_FIXEDLEN 0x01 /* fixed-length records */
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| 169 | #define R_NOKEY 0x02 /* key not required */
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| 170 | #define R_SNAPSHOT 0x04 /* snapshot the input */
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| 171 | u_long flags;
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| 172 | u_int cachesize; /* bytes to cache */
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| 173 | u_int psize; /* page size */
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| 174 | int lorder; /* byte order */
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| 175 | size_t reclen; /* record length (fixed-length records) */
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| 176 | u_char bval; /* delimiting byte (variable-length records */
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| 177 | char *bfname; /* btree file name */
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| 178 | } RECNOINFO;
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| 179 |
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| 180 | #ifdef __DBINTERFACE_PRIVATE
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| 181 | /*
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| 182 | * Little endian <==> big endian 32-bit swap macros.
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| 183 | * M_32_SWAP swap a memory location
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| 184 | * P_32_SWAP swap a referenced memory location
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| 185 | * P_32_COPY swap from one location to another
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| 186 | */
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| 187 | #define M_32_SWAP(a) { \
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| 188 | u_int32_t _tmp = a; \
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| 189 | ((char *)&a)[0] = ((char *)&_tmp)[3]; \
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| 190 | ((char *)&a)[1] = ((char *)&_tmp)[2]; \
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| 191 | ((char *)&a)[2] = ((char *)&_tmp)[1]; \
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| 192 | ((char *)&a)[3] = ((char *)&_tmp)[0]; \
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| 193 | }
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| 194 | #define P_32_SWAP(a) { \
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| 195 | u_int32_t _tmp = *(u_int32_t *)a; \
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| 196 | ((char *)a)[0] = ((char *)&_tmp)[3]; \
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| 197 | ((char *)a)[1] = ((char *)&_tmp)[2]; \
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| 198 | ((char *)a)[2] = ((char *)&_tmp)[1]; \
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| 199 | ((char *)a)[3] = ((char *)&_tmp)[0]; \
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| 200 | }
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| 201 | #define P_32_COPY(a, b) { \
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| 202 | ((char *)&(b))[0] = ((char *)&(a))[3]; \
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| 203 | ((char *)&(b))[1] = ((char *)&(a))[2]; \
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| 204 | ((char *)&(b))[2] = ((char *)&(a))[1]; \
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| 205 | ((char *)&(b))[3] = ((char *)&(a))[0]; \
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| 206 | }
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| 207 |
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| 208 | /*
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| 209 | * Little endian <==> big endian 16-bit swap macros.
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| 210 | * M_16_SWAP swap a memory location
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| 211 | * P_16_SWAP swap a referenced memory location
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| 212 | * P_16_COPY swap from one location to another
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| 213 | */
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| 214 | #define M_16_SWAP(a) { \
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| 215 | u_int16_t _tmp = a; \
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| 216 | ((char *)&a)[0] = ((char *)&_tmp)[1]; \
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| 217 | ((char *)&a)[1] = ((char *)&_tmp)[0]; \
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| 218 | }
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| 219 | #define P_16_SWAP(a) { \
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| 220 | u_int16_t _tmp = *(u_int16_t *)a; \
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| 221 | ((char *)a)[0] = ((char *)&_tmp)[1]; \
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| 222 | ((char *)a)[1] = ((char *)&_tmp)[0]; \
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| 223 | }
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| 224 | #define P_16_COPY(a, b) { \
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| 225 | ((char *)&(b))[0] = ((char *)&(a))[1]; \
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| 226 | ((char *)&(b))[1] = ((char *)&(a))[0]; \
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| 227 | }
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| 228 | #endif
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| 229 |
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| 230 | __BEGIN_DECLS
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| 231 | DB *dbopen __P((const char *, int, int, DBTYPE, const void *));
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| 232 |
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| 233 | #ifdef __DBINTERFACE_PRIVATE
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| 234 | DB *__bt_open __P((const char *, int, int, const BTREEINFO *, int));
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| 235 | DB *__hash_open __P((const char *, int, int, const HASHINFO *, int));
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| 236 | DB *__rec_open __P((const char *, int, int, const RECNOINFO *, int));
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| 237 | void __dbpanic __P((DB *dbp));
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| 238 | #endif
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| 239 | __END_DECLS
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| 240 |
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| 241 | #if defined (__cplusplus)
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| 242 | }
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| 243 | #endif
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| 244 |
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| 245 | #endif /* !_DB_H_ */
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