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-.\" Copyright 2004 Andries Brouwer <aeb@cwi.nl>.
-.\"
-.\" %%%LICENSE_START(VERBATIM)
-.\" Permission is granted to make and distribute verbatim copies of this
-.\" manual provided the copyright notice and this permission notice are
-.\" preserved on all copies.
-.\"
-.\" Permission is granted to copy and distribute modified versions of this
-.\" manual under the conditions for verbatim copying, provided that the
-.\" entire resulting derived work is distributed under the terms of a
-.\" permission notice identical to this one.
-.\"
-.\" Since the Linux kernel and libraries are constantly changing, this
-.\" manual page may be incorrect or out-of-date.  The author(s) assume no
-.\" responsibility for errors or omissions, or for damages resulting from
-.\" the use of the information contained herein.  The author(s) may not
-.\" have taken the same level of care in the production of this manual,
-.\" which is licensed free of charge, as they might when working
-.\" professionally.
-.\"
-.\" Formatted or processed versions of this manual, if unaccompanied by
-.\" the source, must acknowledge the copyright and authors of this work.
-.\" %%%LICENSE_END
-.\"
-.TH INFINITY 3  2007-07-26 "" "Linux Programmer's Manual"
-.SH NAME
-INFINITY, NAN, HUGE_VAL, HUGE_VALF, HUGE_VALL \- floating-point constants
-.SH SYNOPSIS
-.nf
-.BR "#define _ISOC99_SOURCE" "      /* See feature_test_macros(7) */"
-.br
-.B #include <math.h>
-.sp
-.B INFINITY
-.sp
-.B NAN
-.sp
-.B HUGE_VAL
-.br
-.B HUGE_VALF
-.br
-.B HUGE_VALL
-.fi
-.SH DESCRIPTION
-The macro
-.B INFINITY
-expands to a
-.I float
-constant representing positive infinity.
-
-The macro
-.B NAN
-expands to a
-.I float
-constant representing a quiet NaN
-(when supported).
-A
-.I quiet
-NaN is a NaN ("not-a-number") that does not raise exceptions
-when it is used in arithmetic.
-The opposite is a
-.I signaling
-NaN.
-See IEC 60559:1989.
-
-The macros
-.BR HUGE_VAL ,
-.BR HUGE_VALF ,
-.B HUGE_VALL
-expand to constants of types
-.IR double ,
-.I float
-and
-.IR "long double" ,
-respectively,
-that represent a large positive value, possibly positive infinity.
-.SH CONFORMING TO
-C99.
-.SH AVAILABILITY
-On a glibc system, the macro
-.B HUGE_VAL
-is always available.
-Availability of the
-.B NAN
-macro can be tested using
-.BR "#ifdef NAN" ,
-and similarly for
-.BR INFINITY ,
-.BR HUGE_VALF ,
-.BR HUGE_VALL .
-They will be defined by
-.I <math.h>
-if
-.B _ISOC99_SOURCE
-or
-.B _GNU_SOURCE
-is defined, or
-.B __STDC_VERSION__
-is defined
-and has a value not less than 199901L.
-.SH SEE ALSO
-.BR fpclassify (3),
-.BR math_error (7)
-.SH COLOPHON
-This page is part of release 3.79 of the Linux
-.I man-pages
-project.
-A description of the project,
-information about reporting bugs,
-and the latest version of this page,
-can be found at
-\%http://www.kernel.org/doc/man\-pages/.