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