src/backend/port/qnx4/isnan.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

/*-------------------------------------------------------------------------
 *
 * isnan.c
 *	  isnan() implementation
 *
 * Copyright (c) 1999, repas AEG Automation GmbH
 *
 *
 * IDENTIFICATION
 *	  $Header: /cvsroot/pgsql/src/backend/port/qnx4/Attic/isnan.c,v 1.2 2000/04/12 17:15:30 momjian Exp $
 *
 *-------------------------------------------------------------------------
 */

#include "os.h"

unsigned char __nan[8] = __nan_bytes;

int
isnan(double dsrc)
{
	return !memcmp(&dsrc, &NAN, sizeof(double));
}