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.\" Copyright 2004 Andries Brouwer <aeb@cwi.nl>.
.\"
.\" 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.\" manual page may be incorrect or out-of-date.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.
.\"
.\" Japanese Version Copyright (c) 2005 Akihiro MOTOKI
.\" all rights reserved.
.\" Translated 2005-02-21, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\"
.\"WORD: classification ʬ
.\"WORD: infinite ̵
.\"WORD: not-a-number ̵
.\"WORD: NaN ̵
.\"
.TH FINITE 3 2007-07-26 "" "Linux Programmer's Manual"
.SH ̾
finite, finitef, finitel, isinf, isinff, isinfl, isnan, isnanf, isnanl \-
BSD ưʬؿ
.SH
.nf
.B #include <math.h>
.sp
.BI "int finite(double " x );
.br
.BI "int finitef(float " x );
.br
.BI "int finitel(long double " x );
.sp
.BI "int isinf(double " x );
.br
.BI "int isinff(float " x );
.br
.BI "int isinfl(long double " x );
.sp
.BI "int isnan(double " x );
.br
.BI "int isnanf(float " x );
.br
.BI "int isnanl(long double " x );
.fi
.sp
.in -4n
glibc εǽޥ
.RB ( feature_test_macros (7)
):
.in
.sp
.ad l
.BR finite (),
.BR finitef (),
.BR finitel ():
_BSD_SOURCE || _SVID_SOURCE
.br
.BR isinf (),
.BR isinff (),
.BR isinfl ():
_BSD_SOURCE || _SVID_SOURCE
.br
.BR isnan (),
.BR isnanf (),
.BR isnanl ():
_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE
.ad b
.SH
.BR finite ()
ؿϡ \fIx\fP ̵̵ (NaN) ΤǤʤ
0 ʳ֤ͤʳξ 0 ֤
.BR isnan ()
ؿϡ \fIx\fP NaN ξ 0 ʳ֤ͤ
ʳξ 0 ֤
.BR isinf ()
ؿϡ \fIx\fP ̵Ǥ 1 ֤\fIx\fP ̵
\-1 ֤ʳξ 0 ֤
.SH
δؿѻߤ줿դ뤳ȡ
C99 Ǥϡ֤Ȥ (ɤʷˤŬѤǤ)
.BR isfinite (),
.BR isinf (),
.BR isnan ()
ȤޥƤ롣
C99
.BR isinf ()
֤ͤ˴ؤƼ夤̣ǤݾڤʤȤˤ
դ뤳ȡܺ٤
.BR fpclassify (3)
ȡ
.\"
.\" finite* not on HP-UX; they exist on Tru64.
.\" .SH
.\" .BR finite ()
.\" ؿ 4.3BSD о줷
.\" 4.3BSD Υޥ˥奢 IEEE.3
.SH Ϣ
.BR fpclassify (3)
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