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gecko-dev/dbm/include/mcom_db.h

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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*-
* 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. ***REMOVED*** - see
* ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
* 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 8.7 (Berkeley) 6/16/94
*/
#ifndef _DB_H_
#define _DB_H_
#ifdef WINCE
#define off_t long
#endif
#ifndef macintosh
#include <sys/types.h>
#endif
#include "prtypes.h"
#include <limits.h>
#ifdef __DBINTERFACE_PRIVATE
#ifdef HAVE_SYS_CDEFS_H
#include <sys/cdefs.h>
#else
#include "cdefs.h"
#endif
#ifdef HAVE_SYS_BYTEORDER_H
#include <sys/byteorder.h>
#endif
#if defined(__linux) || defined(__BEOS__)
#include <endian.h>
#ifndef BYTE_ORDER
#define BYTE_ORDER __BYTE_ORDER
#define BIG_ENDIAN __BIG_ENDIAN
#define LITTLE_ENDIAN __LITTLE_ENDIAN
#endif
#endif /* __linux */
#ifdef __sgi
#define BYTE_ORDER BIG_ENDIAN
#define BIG_ENDIAN 4321
#define LITTLE_ENDIAN 1234 /* LSB first: i386, vax, all NT risc */
#endif
#ifdef __sun
#define BIG_ENDIAN 4321
#define LITTLE_ENDIAN 1234 /* LSB first: i386, vax, all NT risc */
#ifndef __SVR4
/* compat.h is only in 4.1.3 machines. - dp */
#include <compat.h>
#endif
/* XXX - dp
* Need to find a general way of defining endian-ness in SunOS 5.3
* SunOS 5.4 defines _BIG_ENDIAN and _LITTLE_ENDIAN
* SunOS 5.3 does nothing like this.
*/
#ifndef BYTE_ORDER
#if defined(_BIG_ENDIAN)
#define BYTE_ORDER BIG_ENDIAN
#elif defined(_LITTLE_ENDIAN)
#define BYTE_ORDER LITTLE_ENDIAN
#elif !defined(__SVR4)
/* 4.1.3 is always BIG_ENDIAN as it was released only on sparc platforms. */
#define BYTE_ORDER BIG_ENDIAN
#elif !defined(vax) && !defined(ntohl) && !defined(lint) && !defined(i386)
/* 5.3 big endian. Copied this above line from sys/byteorder.h */
/* Now we are in a 5.3 SunOS rather non 5.4 or above SunOS */
#define BYTE_ORDER BIG_ENDIAN
#else
#define BYTE_ORDER LITTLE_ENDIAN
#endif
#endif /* !BYTE_ORDER */
#endif /* __sun */
#if defined(__hpux) || defined(__hppa)
#define BYTE_ORDER BIG_ENDIAN
#define BIG_ENDIAN 4321
#define LITTLE_ENDIAN 1234 /* LSB first: i386, vax, all NT risc */
#endif
#if defined(AIXV3) || defined(AIX)
/* BYTE_ORDER, LITTLE_ENDIAN, BIG_ENDIAN are all defined here */
#include <sys/machine.h>
#endif
/* Digital Unix */
#ifdef __osf__
#include <machine/endian.h>
#endif
#ifdef __alpha
#ifndef WIN32
#else
/* Alpha NT */
#define BYTE_ORDER LITTLE_ENDIAN
#define BIG_ENDIAN 4321
#define LITTLE_ENDIAN 1234
#endif
#endif
#ifdef NCR
#include <sys/endian.h>
#endif
#ifdef __QNX__
#ifdef __QNXNTO__
#include <sys/param.h>
#else
#define LITTLE_ENDIAN 1234
#define BIG_ENDIAN 4321
#define BYTE_ORDER LITTLE_ENDIAN
#endif
#endif
#ifdef SNI
/* #include <sys/hetero.h> */
#define BYTE_ORDER BIG_ENDIAN
#define BIG_ENDIAN 4321
#define LITTLE_ENDIAN 1234
#endif
#if defined(_WINDOWS) || defined(XP_OS2_VACPP)
#ifdef BYTE_ORDER
#undef BYTE_ORDER
#endif
#define BYTE_ORDER LITTLE_ENDIAN
#define LITTLE_ENDIAN 1234 /* LSB first: i386, vax, all NT risc */
#define BIG_ENDIAN 4321
#endif
#ifdef macintosh
#define BIG_ENDIAN 4321
#define LITTLE_ENDIAN 1234
#define BYTE_ORDER BIG_ENDIAN
#endif
#endif /* __DBINTERFACE_PRIVATE */
#ifdef SCO
#define MAXPATHLEN 1024
#endif
#include <fcntl.h>
#if defined(_WINDOWS) || defined(XP_OS2)
#include <stdio.h>
#include <io.h>
#ifndef XP_OS2
#define MAXPATHLEN 1024
#endif
#ifdef XP_OS2_VACPP
#include <os2.h>
#define MAXPATHLEN CCHMAXPATH
#define EPERM EINVAL
#define ENOTDIR EBADPOS
#define S_ISDIR(s) ((s) & S_IFDIR)
#endif
#define EFTYPE EINVAL /* POSIX 1003.1 format errno. */
#ifndef STDERR_FILENO
#define STDIN_FILENO 0 /* ANSI C #defines */
#define STDOUT_FILENO 1
#define STDERR_FILENO 2
#endif
#ifndef O_ACCMODE /* POSIX 1003.1 access mode mask. */
#define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR)
#endif
#endif
#ifdef macintosh
#include <stdio.h>
#include "xp_mcom.h"
#define O_ACCMODE 3 /* Mask for file access modes */
#define EFTYPE 2000
PR_BEGIN_EXTERN_C
int mkstemp(const char *path);
PR_END_EXTERN_C
#endif /* MACINTOSH */
#if !defined(_WINDOWS) && !defined(macintosh)
#include <sys/stat.h>
#include <errno.h>
#endif
/* define EFTYPE since most don't */
#ifndef EFTYPE
#define EFTYPE EINVAL /* POSIX 1003.1 format errno. */
#endif
#define RET_ERROR -1 /* Return values. */
#define RET_SUCCESS 0
#define RET_SPECIAL 1
#define MAX_PAGE_NUMBER 0xffffffff /* >= # of pages in a file */
#ifndef __sgi
typedef uint32 pgno_t;
#endif
#define MAX_PAGE_OFFSET 65535 /* >= # of bytes in a page */
typedef uint16 indx_t;
#define MAX_REC_NUMBER 0xffffffff /* >= # of records in a tree */
typedef uint32 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;
typedef enum { LockOutDatabase, UnlockDatabase } DBLockFlagEnum;
/*
* !!!
* The following flags are included in the dbopen(3) call as part of the
* open(2) flags. In order to avoid conflicts with the open flags, start
* at the top of the 16 or 32-bit number space and work our way down. If
* the open flags were significantly expanded in the future, it could be
* a problem. Wish I'd left another flags word in the dbopen call.
*
* !!!
* None of this stuff is implemented yet. The only reason that it's here
* is so that the access methods can skip copying the key/data pair when
* the DB_LOCK flag isn't set.
*/
#if UINT_MAX > 65535
#define DB_LOCK 0x20000000 /* Do locking. */
#define DB_SHMEM 0x40000000 /* Use shared memory. */
#define DB_TXN 0x80000000 /* Do transactions. */
#else
#define DB_LOCK 0x2000 /* Do locking. */
#define DB_SHMEM 0x4000 /* Use shared memory. */
#define DB_TXN 0x8000 /* Do transactions. */
#endif
/* Access method description structure. */
typedef struct __db {
DBTYPE type; /* Underlying db type. */
int (*close) (struct __db *);
int (*del) (const struct __db *, const DBT *, uint);
int (*get) (const struct __db *, const DBT *, DBT *, uint);
int (*put) (const struct __db *, DBT *, const DBT *, uint);
int (*seq) (const struct __db *, DBT *, DBT *, uint);
int (*sync) (const struct __db *, uint);
void *internal; /* Access method private. */
int (*fd) (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 */
uint32 flags;
uint cachesize; /* bytes to cache */
int maxkeypage; /* maximum keys per page */
int minkeypage; /* minimum keys per page */
uint psize; /* page size */
int (*compare) /* comparison function */
(const DBT *, const DBT *);
size_t (*prefix) /* prefix function */
(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 {
uint bsize; /* bucket size */
uint ffactor; /* fill factor */
uint nelem; /* number of elements */
uint cachesize; /* bytes to cache */
uint32 /* hash function */
(*hash) (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 */
uint32 flags;
uint cachesize; /* bytes to cache */
uint psize; /* page size */
int lorder; /* byte order */
size_t reclen; /* record length (fixed-length records) */
uint8 bval; /* delimiting byte (variable-length records */
char *bfname; /* btree file name */
} RECNOINFO;
#ifdef __DBINTERFACE_PRIVATE
/*
* Little endian <==> big endian 32-bit swap macros.
* M_32_SWAP swap a memory location
* P_32_SWAP swap a referenced memory location
* P_32_COPY swap from one location to another
*/
#define M_32_SWAP(a) { \
uint32 _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 P_32_SWAP(a) { \
uint32 _tmp = *(uint32 *)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 P_32_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 16-bit swap macros.
* M_16_SWAP swap a memory location
* P_16_SWAP swap a referenced memory location
* P_16_COPY swap from one location to another
*/
#define M_16_SWAP(a) { \
uint16 _tmp = a; \
((char *)&a)[0] = ((char *)&_tmp)[1]; \
((char *)&a)[1] = ((char *)&_tmp)[0]; \
}
#define P_16_SWAP(a) { \
uint16 _tmp = *(uint16 *)a; \
((char *)a)[0] = ((char *)&_tmp)[1]; \
((char *)a)[1] = ((char *)&_tmp)[0]; \
}
#define P_16_COPY(a, b) { \
((char *)&(b))[0] = ((char *)&(a))[1]; \
((char *)&(b))[1] = ((char *)&(a))[0]; \
}
#endif
PR_BEGIN_EXTERN_C
#if defined(__WATCOMC__) || defined(__WATCOM_CPLUSPLUS__)
extern DB *
#else
PR_EXTERN(DB *)
#endif
dbopen (const char *, int, int, DBTYPE, const void *);
/* set or unset a global lock flag to disable the
* opening of any DBM file
*/
void dbSetOrClearDBLock(DBLockFlagEnum type);
#ifdef __DBINTERFACE_PRIVATE
DB *__bt_open (const char *, int, int, const BTREEINFO *, int);
DB *__hash_open (const char *, int, int, const HASHINFO *, int);
DB *__rec_open (const char *, int, int, const RECNOINFO *, int);
void __dbpanic (DB *dbp);
#endif
PR_END_EXTERN_C
#endif /* !_DB_H_ */
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