| 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: [email protected]
|
|---|
| 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_FAST 16 /* Write fast! => No fsyncs. */
|
|---|
| 39 |
|
|---|
| 40 | /* Parameters to gdbm_store for simple insertion or replacement in the
|
|---|
| 41 | case a key to store is already in the database. */
|
|---|
| 42 | #define GDBM_INSERT 0 /* Do not overwrite data in the database. */
|
|---|
| 43 | #define GDBM_REPLACE 1 /* Replace the old value with the new value. */
|
|---|
| 44 |
|
|---|
| 45 | /* Parameters to gdbm_setopt, specifing the type of operation to perform. */
|
|---|
| 46 | #define GDBM_CACHESIZE 1 /* Set the cache size. */
|
|---|
| 47 | #define GDBM_FASTMODE 2 /* Turn on or off fast mode. */
|
|---|
| 48 |
|
|---|
| 49 | /* In freeing blocks, we will ignore any blocks smaller (and equal) to
|
|---|
| 50 | IGNORE_SIZE number of bytes. */
|
|---|
| 51 | #define IGNORE_SIZE 4
|
|---|
| 52 |
|
|---|
| 53 | /* The number of key bytes kept in a hash bucket. */
|
|---|
| 54 | #define SMALL 4
|
|---|
| 55 |
|
|---|
| 56 | /* The number of bucket_avail entries in a hash bucket. */
|
|---|
| 57 | #define BUCKET_AVAIL 6
|
|---|
| 58 |
|
|---|
| 59 | /* The size of the bucket cache. */
|
|---|
| 60 | #define DEFAULT_CACHESIZE 100
|
|---|
