зеркало из https://github.com/mozilla/pjs.git
419 строки
12 KiB
C
419 строки
12 KiB
C
/*-
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* Copyright (c) 1990, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)db.h 8.7 (Berkeley) 6/16/94
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*/
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#ifndef _DB_H_
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#define _DB_H_
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#include "prtypes.h"
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#ifdef __sgi
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#define BYTE_ORDER BIG_ENDIAN
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#define BIG_ENDIAN 4321
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#define LITTLE_ENDIAN 1234 /* LSB first: i386, vax, all NT risc */
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#define __BIT_TYPES_DEFINED__
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#endif
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#ifdef __sun
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#define BIG_ENDIAN 4321
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#define LITTLE_ENDIAN 1234 /* LSB first: i386, vax, all NT risc */
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#if !defined(SVR4) && !defined(__svr4__)
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/* compat.h is only in 4.1.3 machines. - dp */
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#include <compat.h>
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#endif
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/* XXX - dp
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* Need to find a general way of defining endian-ness in SunOS 5.3
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* SunOS 5.4 defines _BIG_ENDIAN and _LITTLE_ENDIAN
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* SunOS 5.3 does nothing like this.
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*/
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#ifndef BYTE_ORDER
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#if defined(_BIG_ENDIAN)
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#define BYTE_ORDER BIG_ENDIAN
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#elif defined(_LITTLE_ENDIAN)
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#define BYTE_ORDER LITTLE_ENDIAN
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#elif !defined(SVR4)
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/* 4.1.3 is always BIG_ENDIAN as it was released only on sparc platforms. */
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#define BYTE_ORDER BIG_ENDIAN
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#elif !defined(vax) && !defined(ntohl) && !defined(lint) && !defined(i386)
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/* 5.3 big endian. Copied this above line from sys/byteorder.h */
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/* Now we are in a 5.3 SunOS rather non 5.4 or above SunOS */
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#define BYTE_ORDER BIG_ENDIAN
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#else
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#define BYTE_ORDER LITTLE_ENDIAN
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#endif
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#endif /* !BYTE_ORDER */
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#endif /* __sun */
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#ifdef __linux
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# include <endian.h>
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# ifndef BYTE_ORDER
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# define BYTE_ORDER __BYTE_ORDER
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# define BIG_ENDIAN __BIG_ENDIAN
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# define LITTLE_ENDIAN __LITTLE_ENDIAN
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# endif
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#endif /* __linux */
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#ifdef SCO
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#include <sys/types.h>
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#include <sys/byteorder.h>
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#include <sys/bitypes.h>
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#define MAXPATHLEN 1024
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#endif
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#ifdef SNI
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#include <sys/types.h>
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#include <sys/byteorder.h>
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/* #include <sys/hetero.h> */
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#define BYTE_ORDER BIG_ENDIAN
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#define BIG_ENDIAN 4321
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#define LITTLE_ENDIAN 1234
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#endif
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#ifdef UNIXWARE
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#include <sys/types.h>
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#include <sys/byteorder.h>
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#endif
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#ifdef NCR
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#include <sys/types.h>
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#include <sys/byteorder.h>
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#include <sys/endian.h>
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#endif
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#ifdef macintosh
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#include <unix.h>
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#endif
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#ifndef macintosh
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#include <fcntl.h>
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#endif
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#ifdef _WINDOWS
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#include <stdio.h>
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#include <io.h>
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#include <limits.h>
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#define MAXPATHLEN 1024
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#define EFTYPE EINVAL /* POSIX 1003.1 format errno. */
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#ifndef STDERR_FILENO
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#define STDIN_FILENO 0 /* ANSI C #defines */
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#define STDOUT_FILENO 1
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#define STDERR_FILENO 2
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#endif
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#ifndef O_ACCMODE /* POSIX 1003.1 access mode mask. */
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#define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR)
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#endif
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#ifdef BYTE_ORDER
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#undef BYTE_ORDER
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#endif
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#define BYTE_ORDER LITTLE_ENDIAN
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#define LITTLE_ENDIAN 1234 /* LSB first: i386, vax, all NT risc */
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#define BIG_ENDIAN 4321
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#endif
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#if defined(_WINDOWS) && !defined(_WIN32)
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/* 16 bit windows defines */
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#define MAX_PAGE_NUMBER 0xffffffff /* >= # of pages in a file */
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#endif
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#ifdef macintosh
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#include <stdio.h>
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#include "xp_mcom.h"
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#define BIG_ENDIAN 4321
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#define LITTLE_ENDIAN 1234
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#define BYTE_ORDER BIG_ENDIAN
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#define O_ACCMODE 3 /* Mask for file access modes */
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#define EFTYPE 2000
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XP_BEGIN_PROTOS
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int mkstemp(const char *path);
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XP_END_PROTOS
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#endif /* MACINTOSH */
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#ifndef macintosh
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#include <sys/types.h>
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#endif
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#if !defined(_WINDOWS) && !defined(macintosh)
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#include <sys/stat.h>
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#include <errno.h>
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#endif
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#include "cdefs.h"
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#ifndef _WINDOWS /* included above to prevent spurious warnings chouck 12-Sep-95 */
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#include <limits.h>
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#endif
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#ifndef MIN
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#define MIN(x, y) (((x) < (y)) ? (x) : (y))
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#endif
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#ifndef MAX
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#define MAX(x, y) (((x) > (y)) ? (x) : (y))
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#endif
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#define RET_ERROR -1 /* Return values. */
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#define RET_SUCCESS 0
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#define RET_SPECIAL 1
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#if defined(__386BSD__) || defined(SCO)
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#define __BIT_TYPES_DEFINED__
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#endif
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#define MAX_PAGE_NUMBER 0xffffffff /* >= # of pages in a file */
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#ifndef __sgi
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typedef uint32 pgno_t;
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#endif
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#define MAX_PAGE_OFFSET 65535 /* >= # of bytes in a page */
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typedef uint16 indx_t;
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#define MAX_REC_NUMBER 0xffffffff /* >= # of records in a tree */
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typedef uint32 recno_t;
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/* define EFTYPE since most don't */
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#ifndef EFTYPE
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#define EFTYPE EINVAL /* POSIX 1003.1 format errno. */
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#endif
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/* Key/data structure -- a Data-Base Thang. */
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typedef struct {
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void *data; /* data */
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size_t size; /* data length */
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} DBT;
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/* Routine flags. */
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#define R_CURSOR 1 /* del, put, seq */
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#define __R_UNUSED 2 /* UNUSED */
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#define R_FIRST 3 /* seq */
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#define R_IAFTER 4 /* put (RECNO) */
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#define R_IBEFORE 5 /* put (RECNO) */
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#define R_LAST 6 /* seq (BTREE, RECNO) */
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#define R_NEXT 7 /* seq */
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#define R_NOOVERWRITE 8 /* put */
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#define R_PREV 9 /* seq (BTREE, RECNO) */
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#define R_SETCURSOR 10 /* put (RECNO) */
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#define R_RECNOSYNC 11 /* sync (RECNO) */
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typedef enum { DB_BTREE, DB_HASH, DB_RECNO } DBTYPE;
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typedef enum { LockOutDatabase, UnlockDatabase } DBLockFlagEnum;
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/*
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* !!!
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* The following flags are included in the dbopen(3) call as part of the
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* open(2) flags. In order to avoid conflicts with the open flags, start
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* at the top of the 16 or 32-bit number space and work our way down. If
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* the open flags were significantly expanded in the future, it could be
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* a problem. Wish I'd left another flags word in the dbopen call.
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*
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* !!!
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* None of this stuff is implemented yet. The only reason that it's here
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* is so that the access methods can skip copying the key/data pair when
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* the DB_LOCK flag isn't set.
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*/
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#if UINT_MAX > 65535
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#define DB_LOCK 0x20000000 /* Do locking. */
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#define DB_SHMEM 0x40000000 /* Use shared memory. */
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#define DB_TXN 0x80000000 /* Do transactions. */
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#else
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#define DB_LOCK 0x2000 /* Do locking. */
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#define DB_SHMEM 0x4000 /* Use shared memory. */
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#define DB_TXN 0x8000 /* Do transactions. */
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#endif
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/* Access method description structure. */
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typedef struct __db {
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DBTYPE type; /* Underlying db type. */
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int (*close) (struct __db *);
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int (*del) (const struct __db *, const DBT *, uint);
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int (*get) (const struct __db *, const DBT *, DBT *, uint);
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int (*put) (const struct __db *, DBT *, const DBT *, uint);
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int (*seq) (const struct __db *, DBT *, DBT *, uint);
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int (*sync) (const struct __db *, uint);
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void *internal; /* Access method private. */
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int (*fd) (const struct __db *);
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} DB;
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#define BTREEMAGIC 0x053162
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#define BTREEVERSION 3
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/* Structure used to pass parameters to the btree routines. */
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typedef struct {
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#define R_DUP 0x01 /* duplicate keys */
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uint32 flags;
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uint cachesize; /* bytes to cache */
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int maxkeypage; /* maximum keys per page */
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int minkeypage; /* minimum keys per page */
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uint psize; /* page size */
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int (*compare) /* comparison function */
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(const DBT *, const DBT *);
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size_t (*prefix) /* prefix function */
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(const DBT *, const DBT *);
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int lorder; /* byte order */
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} BTREEINFO;
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#define HASHMAGIC 0x061561
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#define HASHVERSION 2
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/* Structure used to pass parameters to the hashing routines. */
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typedef struct {
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uint bsize; /* bucket size */
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uint ffactor; /* fill factor */
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uint nelem; /* number of elements */
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uint cachesize; /* bytes to cache */
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uint32 /* hash function */
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(*hash) (const void *, size_t);
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int lorder; /* byte order */
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} HASHINFO;
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/* Structure used to pass parameters to the record routines. */
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typedef struct {
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#define R_FIXEDLEN 0x01 /* fixed-length records */
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#define R_NOKEY 0x02 /* key not required */
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#define R_SNAPSHOT 0x04 /* snapshot the input */
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uint32 flags;
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uint cachesize; /* bytes to cache */
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uint psize; /* page size */
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int lorder; /* byte order */
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size_t reclen; /* record length (fixed-length records) */
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uint8 bval; /* delimiting byte (variable-length records */
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char *bfname; /* btree file name */
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} RECNOINFO;
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/* #ifdef __DBINTERFACE_PRIVATE */
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/*
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* Little endian <==> big endian 32-bit swap macros.
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* M_32_SWAP swap a memory location
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* P_32_SWAP swap a referenced memory location
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* P_32_COPY swap from one location to another
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*/
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#define M_32_SWAP(a) { \
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uint32 _tmp = a; \
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((char *)&a)[0] = ((char *)&_tmp)[3]; \
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((char *)&a)[1] = ((char *)&_tmp)[2]; \
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((char *)&a)[2] = ((char *)&_tmp)[1]; \
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((char *)&a)[3] = ((char *)&_tmp)[0]; \
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}
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#define P_32_SWAP(a) { \
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uint32 _tmp = *(uint32 *)a; \
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((char *)a)[0] = ((char *)&_tmp)[3]; \
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((char *)a)[1] = ((char *)&_tmp)[2]; \
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((char *)a)[2] = ((char *)&_tmp)[1]; \
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((char *)a)[3] = ((char *)&_tmp)[0]; \
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}
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#define P_32_COPY(a, b) { \
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((char *)&(b))[0] = ((char *)&(a))[3]; \
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((char *)&(b))[1] = ((char *)&(a))[2]; \
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((char *)&(b))[2] = ((char *)&(a))[1]; \
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((char *)&(b))[3] = ((char *)&(a))[0]; \
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}
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/*
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* Little endian <==> big endian 16-bit swap macros.
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* M_16_SWAP swap a memory location
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* P_16_SWAP swap a referenced memory location
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* P_16_COPY swap from one location to another
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*/
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#define M_16_SWAP(a) { \
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uint16 _tmp = a; \
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((char *)&a)[0] = ((char *)&_tmp)[1]; \
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((char *)&a)[1] = ((char *)&_tmp)[0]; \
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}
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#define P_16_SWAP(a) { \
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uint16 _tmp = *(uint16 *)a; \
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((char *)a)[0] = ((char *)&_tmp)[1]; \
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((char *)a)[1] = ((char *)&_tmp)[0]; \
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}
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#define P_16_COPY(a, b) { \
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((char *)&(b))[0] = ((char *)&(a))[1]; \
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((char *)&(b))[1] = ((char *)&(a))[0]; \
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}
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/* #endif */
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__BEGIN_DECLS
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#if defined(__WATCOMC__) || defined(__WATCOM_CPLUSPLUS__)
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extern DB *
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#else
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PR_EXTERN(DB *)
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#endif
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dbopen (const char *, int, int, DBTYPE, const void *);
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/* set or unset a global lock flag to disable the
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* opening of any DBM file
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*/
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void dbSetOrClearDBLock(DBLockFlagEnum type);
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/* #ifdef __DBINTERFACE_PRIVATE */
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DB *__bt_open (const char *, int, int, const BTREEINFO *, int);
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DB *__hash_open (const char *, int, int, const HASHINFO *, int);
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DB *__rec_open (const char *, int, int, const RECNOINFO *, int);
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void __dbpanic (DB *dbp);
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/* #endif */
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__END_DECLS
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#if defined(__hpux) || defined(__hppa)
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#define BYTE_ORDER BIG_ENDIAN
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#define BIG_ENDIAN 4321
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#define LITTLE_ENDIAN 1234 /* LSB first: i386, vax, all NT risc */
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#endif
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#if defined(AIXV3)
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/* BYTE_ORDER, LITTLE_ENDIAN, BIG_ENDIAN are all defined here */
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#include <sys/machine.h>
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#endif
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#if defined(AIX)
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/* BYTE_ORDER, LITTLE_ENDIAN, BIG_ENDIAN are all defined here */
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#include <sys/machine.h>
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#endif
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/* Digital Unix */
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#ifdef __osf__
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#include <machine/endian.h>
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#endif
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#endif /* !_DB_H_ */
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