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-'\" t
-.\" Copyright 2004 Andries Brouwer <aeb@cwi.nl>.
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.TH finite 3 (date) "Linux man-pages (unreleased)"
-.SH NAME
-finite, finitef, finitel, isinf, isinff, isinfl, isnan, isnanf, isnanl \-
-BSD floating-point classification functions
-.SH LIBRARY
-Math library
-.RI ( libm ", " \-lm )
-.SH SYNOPSIS
-.nf
-.B #include <math.h>
-.PP
-.BI "int finite(double " x );
-.BI "int finitef(float " x );
-.BI "int finitel(long double " x );
-.PP
-.BI "int isinf(double " x );
-.BI "int isinff(float " x );
-.BI "int isinfl(long double " x );
-.PP
-.BI "int isnan(double " x );
-.BI "int isnanf(float " x );
-.BI "int isnanl(long double " x );
-.fi
-.PP
-.RS -4
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.RE
-.PP
-.BR finite (),
-.BR finitef (),
-.BR finitel ():
-.nf
-    /* glibc >= 2.19: */ _DEFAULT_SOURCE
-        || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
-.PP
-.BR isinf ():
-    _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE
-        || /* glibc >= 2.19: */ _DEFAULT_SOURCE
-        || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
-.fi
-.PP
-.BR isinff (),
-.BR isinfl ():
-.nf
-    /* glibc >= 2.19: */ _DEFAULT_SOURCE
-        || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
-.fi
-.PP
-.BR isnan ():
-.nf
-    _XOPEN_SOURCE || _ISOC99_SOURCE
-        || /* glibc >= 2.19: */ _DEFAULT_SOURCE
-        || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
-.fi
-.PP
-.BR isnanf (),
-.BR isnanl ():
-.nf
-    _XOPEN_SOURCE >= 600
-        || /* glibc >= 2.19: */ _DEFAULT_SOURCE
-        || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
-.fi
-.SH DESCRIPTION
-The
-.BR finite (),
-.BR finitef (),
-and
-.BR finitel ()
-functions return a nonzero value if
-.I x
-is neither infinite
-nor a "not-a-number" (NaN) value, and 0 otherwise.
-.PP
-The
-.BR isnan (),
-.BR isnanf (),
-and
-.BR isnanl ()
-functions return a nonzero value if
-.I x
-is a NaN value,
-and 0 otherwise.
-.PP
-The
-.BR isinf (),
-.BR isinff (),
-and
-.BR isinfl ()
-functions return 1 if
-.I x
-is positive infinity, \-1 if
-.I x
-is negative infinity, and 0 otherwise.
-.SH ATTRIBUTES
-For an explanation of the terms used in this section, see
-.BR attributes (7).
-.ad l
-.nh
-.TS
-allbox;
-lbx lb lb
-l l l.
-Interface	Attribute	Value
-T{
-.BR finite (),
-.BR finitef (),
-.BR finitel (),
-.BR isinf (),
-.BR isinff (),
-.BR isinfl (),
-.BR isnan (),
-.BR isnanf (),
-.BR isnanl ()
-T}	Thread safety	MT-Safe
-.TE
-.hy
-.ad
-.sp 1
-.SH NOTES
-Note that these functions are obsolete.
-C99 defines macros
-.BR isfinite (),
-.BR isinf (),
-and
-.BR isnan ()
-(for all types) replacing them.
-Further note that the C99
-.BR isinf ()
-has weaker guarantees on the return value.
-See
-.BR fpclassify (3).
-.\"
-.\" finite* not on HP-UX; they exist on Tru64.
-.\" .SH HISTORY
-.\" The
-.\" .BR finite ()
-.\" function occurs in 4.3BSD.
-.\" see IEEE.3 in the 4.3BSD manual
-.SH SEE ALSO
-.BR fpclassify (3)