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-.\" Copyright (c) 1991, 1993
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. All advertising materials mentioning features or use of this software
-.\"    must display the following acknowledgement:
-.\"	This product includes software developed by the University of
-.\"	California, Berkeley and its contributors.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"     @(#)isinf.3	8.2 (Berkeley) 1/29/94
-.\"
-.Dd January 29, 1994
-.Dt ISINF 3
-.Os
-.Sh NAME
-.Nm isinf ,
-.Nm isnan
-.Nd test for infinity or not-a-number
-.Sh SYNOPSIS
-.Ft int 
-.Fn isinf double
-.Ft int 
-.Fn isnan double
-.Sh DESCRIPTION
-The
-.Fn isninf
-function
-returns 1 if the number is
-.Dq \\*(If ,
-otherwise 0.
-.Pp
-The
-.Fn isnan
-function
-returns 1 if the number is
-.Dq not-a-number ,
-otherwise 0.
-.Sh SEE ALSO
-.Xr math 3
-.Rs
-.%T "IEEE Standard for Binary Floating-Point Arithmetic"
-.%Q ANSI
-.%R Std 754-1985
-.Re
-.Sh BUGS
-Neither the
-.Tn VAX
-nor the Tahoe floating point have distinguished values
-for either infinity or not-a-number.
-These routines always return 0 on those architectures.