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diff --git a/man3p/isnan.3p b/man3p/isnan.3p new file mode 100644 index 000000000..7dbb17855 --- /dev/null +++ b/man3p/isnan.3p @@ -0,0 +1,55 @@ +.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved +.TH "ISNAN" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual" +.\" isnan +.SH NAME +isnan \- test for a NaN +.SH SYNOPSIS +.LP +\fB#include <math.h> +.br +.sp +int isnan(real-floating\fP \fIx\fP\fB); +.br +\fP +.SH DESCRIPTION +.LP +The \fIisnan\fP() macro shall determine whether its argument value +is a NaN. First, an argument represented in a format wider +than its semantic type is converted to its semantic type. Then determination +is based on the type of the argument. +.SH RETURN VALUE +.LP +The \fIisnan\fP() macro shall return a non-zero value if and only +if its argument has a NaN value. +.SH ERRORS +.LP +No errors are defined. +.LP +\fIThe following sections are informative.\fP +.SH EXAMPLES +.LP +None. +.SH APPLICATION USAGE +.LP +None. +.SH RATIONALE +.LP +None. +.SH FUTURE DIRECTIONS +.LP +None. +.SH SEE ALSO +.LP +\fIfpclassify\fP() , \fIisfinite\fP() , \fIisinf\fP() , \fIisnormal\fP() +, \fIsignbit\fP() , the +Base Definitions volume of IEEE\ Std\ 1003.1-2001, \fI<math.h>\fP +.SH COPYRIGHT +Portions of this text are reprinted and reproduced in electronic form +from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology +-- Portable Operating System Interface (POSIX), The Open Group Base +Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of +Electrical and Electronics Engineers, Inc and The Open Group. In the +event of any discrepancy between this version and the original IEEE and +The Open Group Standard, the original IEEE and The Open Group Standard +is the referee document. The original Standard can be obtained online at +http://www.opengroup.org/unix/online.html . |