1/* gdbmconst.h - The constants defined for use in gdbm. */ 2 3/* This file is part of GDBM, the GNU data base manager, by Philip A. Nelson. 4 Copyright (C) 1990, 1991, 1993 Free Software Foundation, Inc. 5 6 GDBM is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GDBM is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GDBM; see the file COPYING. If not, write to 18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 19 20 You may contact the author by: 21 e-mail: phil@cs.wwu.edu 22 us-mail: Philip A. Nelson 23 Computer Science Department 24 Western Washington University 25 Bellingham, WA 98226 26 27*************************************************************************/ 28 29/* Start with the constant definitions. */ 30#define TRUE 1 31#define FALSE 0 32 33/* Parameters to gdbm_open. */ 34#define GDBM_READER 0 /* READERS only. */ 35#define GDBM_WRITER 1 /* READERS and WRITERS. Can not create. */ 36#define GDBM_WRCREAT 2 /* If not found, create the db. */ 37#define GDBM_NEWDB 3 /* ALWAYS create a new db. (WRITER) */ 38#define GDBM_OPENMASK 7 /* Mask for the above. */ 39#define GDBM_FAST 0x10 /* Write fast! => No fsyncs. OBSOLETE. */ 40#define GDBM_SYNC 0x20 /* Sync operations to the disk. */ 41#define GDBM_NOLOCK 0x40 /* Don't do file locking operations. */ 42 43/* Parameters to gdbm_store for simple insertion or replacement in the 44 case a key to store is already in the database. */ 45#define GDBM_INSERT 0 /* Do not overwrite data in the database. */ 46#define GDBM_REPLACE 1 /* Replace the old value with the new value. */ 47 48/* Parameters to gdbm_setopt, specifing the type of operation to perform. */ 49#define GDBM_CACHESIZE 1 /* Set the cache size. */ 50#define GDBM_FASTMODE 2 /* Turn on or off fast mode. OBSOLETE. */ 51#define GDBM_SYNCMODE 3 /* Turn on or off sync operations. */ 52#define GDBM_CENTFREE 4 /* Keep all free blocks in the header. */ 53#define GDBM_COALESCEBLKS 5 /* Attempt to coalesce free blocks. */ 54 55/* In freeing blocks, we will ignore any blocks smaller (and equal) to 56 IGNORE_SIZE number of bytes. */ 57#define IGNORE_SIZE 4 58 59/* The number of key bytes kept in a hash bucket. */ 60#define SMALL 4 61 62/* The number of bucket_avail entries in a hash bucket. */ 63#define BUCKET_AVAIL 6 64 65/* The size of the bucket cache. */ 66#define DEFAULT_CACHESIZE 100 67