mirror of https://github.com/mkerrisk/man-pages
57 lines
1.7 KiB
Plaintext
57 lines
1.7 KiB
Plaintext
.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
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.TH "ISFINITE" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
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.\" isfinite
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.SH NAME
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isfinite \- test for finite value
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.SH SYNOPSIS
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.LP
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\fB#include <math.h>
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.br
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.sp
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int isfinite(real-floating\fP \fIx\fP\fB);
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.br
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\fP
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.SH DESCRIPTION
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.LP
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The \fIisfinite\fP() macro shall determine whether its argument has
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a finite value (zero, subnormal, or normal, and not
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infinite or NaN). First, an argument represented in a format wider
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than its semantic type is converted to its semantic type. Then
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determination is based on the type of the argument.
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.SH RETURN VALUE
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.LP
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The \fIisfinite\fP() macro shall return a non-zero value if and only
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if its argument has a finite value.
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.SH ERRORS
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.LP
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No errors are defined.
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.LP
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\fIThe following sections are informative.\fP
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.SH EXAMPLES
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.LP
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None.
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.SH APPLICATION USAGE
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.LP
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None.
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.SH RATIONALE
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.LP
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None.
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.SH FUTURE DIRECTIONS
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.LP
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None.
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.SH SEE ALSO
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.LP
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\fIfpclassify\fP() , \fIisinf\fP() , \fIisnan\fP() , \fIisnormal\fP()
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, \fIsignbit\fP() , the
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Base Definitions volume of IEEE\ Std\ 1003.1-2001 \fI<math.h>\fP
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.SH COPYRIGHT
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Portions of this text are reprinted and reproduced in electronic form
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from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
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-- Portable Operating System Interface (POSIX), The Open Group Base
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Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
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Electrical and Electronics Engineers, Inc and The Open Group. In the
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event of any discrepancy between this version and the original IEEE and
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The Open Group Standard, the original IEEE and The Open Group Standard
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is the referee document. The original Standard can be obtained online at
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http://www.opengroup.org/unix/online.html .
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