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/* gdbmconst.h - The constants defined for use in gdbm. */
/* This file is part of GDBM, the GNU data base manager.
Copyright (C) 1990, 1991, 1993, 2007 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
/* Start with the constant definitions. */
#define TRUE 1
#define FALSE 0
/* Header magic numbers. Since we don't have space for flags or versions, we
use different static numbers to determine what kind of file it is.
This should've been done back when off_t was added to the library, but
alas... We just have to assume that an OMAGIC file is readable. */
#define GDBM_OMAGIC 0x13579ace /* Original magic number. */
#define GDBM_MAGIC32 0x13579acd /* New 32bit magic number. */
#define GDBM_MAGIC64 0x13579acf /* New 64bit magic number. */
#define GDBM_OMAGIC_SWAP 0xce9a5713 /* OMAGIC swapped. */
#define GDBM_MAGIC32_SWAP 0xcd9a5713 /* MAGIC32 swapped. */
#define GDBM_MAGIC64_SWAP 0xcf9a5713 /* MAGIC64 swapped. */
/* Parameters to gdbm_open. */
#define GDBM_READER 0 /* READERS only. */
#define GDBM_WRITER 1 /* READERS and WRITERS. Can not create. */
#define GDBM_WRCREAT 2 /* If not found, create the db. */
#define GDBM_NEWDB 3 /* ALWAYS create a new db. (WRITER) */
#define GDBM_OPENMASK 7 /* Mask for the above. */
#define GDBM_FAST 0x10 /* Write fast! => No fsyncs. OBSOLETE. */
#define GDBM_SYNC 0x20 /* Sync operations to the disk. */
#define GDBM_NOLOCK 0x40 /* Don't do file locking operations. */
#define GDBM_NOMMAP 0x80 /* Don't use mmap(). */
/* Parameters to gdbm_store for simple insertion or replacement in the
case a key to store is already in the database. */
#define GDBM_INSERT 0 /* Do not overwrite data in the database. */
#define GDBM_REPLACE 1 /* Replace the old value with the new value. */
/* Parameters to gdbm_setopt, specifing the type of operation to perform. */
#define GDBM_CACHESIZE 1 /* Set the cache size. */
#define GDBM_FASTMODE 2 /* Turn on or off fast mode. OBSOLETE. */
#define GDBM_SYNCMODE 3 /* Turn on or off sync operations. */
#define GDBM_CENTFREE 4 /* Keep all free blocks in the header. */
#define GDBM_COALESCEBLKS 5 /* Attempt to coalesce free blocks. */
/* In freeing blocks, we will ignore any blocks smaller (and equal) to
IGNORE_SIZE number of bytes. */
#define IGNORE_SIZE 4
/* The number of key bytes kept in a hash bucket. */
#define SMALL 4
/* The number of bucket_avail entries in a hash bucket. */
#define BUCKET_AVAIL 6
/* The size of the bucket cache. */
#define DEFAULT_CACHESIZE 100
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