minix/lib/libm/complex/cproj.3
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

59 lines
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.\" $NetBSD: cproj.3,v 1.4 2012/12/27 21:34:10 wiz Exp $
.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
.Dd December 27, 2012
.Dt CPROJ 3
.Os
.Sh NAME
.Nm cproj ,
.Nm cprojf ,
.Nm cprojl
.Nd complex projection functions
.Sh SYNOPSIS
.In complex.h
.Ft double
.Fn cproj "double complex z"
.Ft float
.Fn cprojf "float complex z"
.Ft long double
.Fn cprojl "long double complex z"
.Sh DESCRIPTION
These functions compute a projection of
.Ar z
onto the Riemann sphere:
.Ar z
projects to
.Ar z ,
except that all complex infinities (even those
with one infinite part and one NaN part) project to positive infinity on the
real axis.
If
.Ar z
has an infinite part, then
.Fn cproj
shall be equivalent to:
.Bd -literal -offset indent
INFINITY + I * copysign(0.0, cimag(z))
.Ed
.Sh RETURN VALUES
These functions return the value of the projection onto the Riemann sphere.
.Sh ERRORS
No errors are defined.
.Sh SEE ALSO
.Xr carg 3 ,
.Xr cimag 3 ,
.Xr conj 3 ,
.Xr creal 3 ,
.St -p1003.1-2001
.Aq Pa complex.h
.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 .