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diff --git a/src/gdbmconst.h b/src/gdbmconst.h
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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