| 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: phil@cs.wwu.edu |
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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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