?RCS: $Id: i_db.U 1 2006-08-24 12:32:52Z rmanfredi $
?RCS:
?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi
?RCS: 
?RCS: You may redistribute only under the terms of the Artistic Licence,
?RCS: as specified in the README file that comes with the distribution.
?RCS: You may reuse parts of this distribution only within the terms of
?RCS: that same Artistic Licence; a copy of which may be found at the root
?RCS: of the source tree for dist 4.0.
?RCS:
?RCS: Original Author: Andy Dougherty <doughera@lafcol.lafayette.edu>
?RCS:
?RCS: $Log: i_db.U,v $
?RCS: Revision 3.0.1.3  1995/07/25  14:10:22  ram
?RCS: patch56: conditionally use const in test programs (ADO)
?RCS:
?RCS: Revision 3.0.1.2  1995/05/12  12:14:42  ram
?RCS: patch54: extended for more intimate DB probing (ADO)
?RCS:
?RCS: Revision 3.0.1.1  1994/08/29  16:21:50  ram
?RCS: patch32: created by ADO
?RCS:
?MAKE:i_db db_hashtype db_prefixtype: Inhdr +cc +ccflags rm contains cat \
		d_const
?MAKE:	-pick add $@ %<
?S:i_db:
?S:	This variable conditionally defines the I_DB symbol, and indicates
?S:	whether a C program may include Berkeley's DB include file <db.h>.
?S:.
?S:db_hashtype:
?S:	This variable contains the type of the hash structure element
?S:	in the <db.h> header file.  In older versions of DB, it was
?S:	int, while in newer ones it is u_int32_t.
?S:.
?S:db_prefixtype:
?S:	This variable contains the type of the prefix structure element
?S:	in the <db.h> header file.  In older versions of DB, it was
?S:	int, while in newer ones it is size_t.
?S:.
?C:I_DB:
?C:	This symbol, if defined, indicates to the C program that it should
?C:	include Berkeley's DB include file <db.h>.
?C:.
?C:DB_Prefix_t:
?C:	This symbol contains the type of the prefix structure element
?C:	in the <db.h> header file.  In older versions of DB, it was
?C:	int, while in newer ones it is u_int32_t.
?C:.
?C:DB_Hash_t:
?C:	This symbol contains the type of the prefix structure element
?C:	in the <db.h> header file.  In older versions of DB, it was
?C:	int, while in newer ones it is size_t.
?C:.
?H:#$i_db I_DB		/**/
?H:#define DB_Hash_t	$db_hashtype		/**/
?H:#define DB_Prefix_t	$db_prefixtype  	/**/
?H:.
?LINT:set i_db
: see if this is a db.h system
set db.h i_db
eval $inhdr

@if DB_Hash_t
case "$i_db" in
define)
	: Check the return type needed for hash 
	echo " "
	echo "Checking return type needed for hash for Berkeley DB ..." >&4
	$cat >try.c <<EOCP
#$d_const HASCONST
#ifndef HASCONST
#define const
#endif
#include <sys/types.h>
#include <db.h>
u_int32_t hash_cb (ptr, size)
const void *ptr;
size_t size;
{
}
HASHINFO info;
int main()
{
	info.hash = hash_cb;
}
EOCP
	if $cc $ccflags -c try.c >try.out 2>&1 ; then
		if $contains warning try.out >>/dev/null 2>&1 ; then
			db_hashtype='int'
		else
			db_hashtype='u_int32_t'
		fi
	else
		echo "I can't seem to compile the test program." >&4
		db_hashtype=int
	fi
	$rm -f try.*
	echo "Your version of Berkeley DB uses $db_hashtype for hash."
	;;
*)	db_hashtype=int
	;;
esac

@end
@if DB_Prefix_t
case "$i_db" in
define)
	: Check the return type needed for prefix 
	echo " "
	echo "Checking return type needed for prefix for Berkeley DB ..." >&4
	cat >try.c <<EOCP
#$d_const HASCONST
#ifndef HASCONST
#define const
#endif
#include <sys/types.h>
#include <db.h>
size_t prefix_cb (key1, key2)
const DBT *key1;
const DBT *key2;
{
}
BTREEINFO info;
int main()
{
	info.prefix = prefix_cb;
}
EOCP
	if $cc $ccflags -c try.c  >try.out 2>&1 ; then
		if $contains warning try.out >>/dev/null 2>&1 ; then
			db_prefixtype='int'
		else
			db_prefixtype='size_t'
		fi
	else
		echo "I can't seem to compile the test program." >&4
		db_prefixtype='int'
	fi
	$rm -f try.*
	echo "Your version of Berkeley DB uses $db_prefixtype for prefix."
	;;
*)	db_prefixtype='int'
	;;
esac

@end
