Implement carg(3) and cargf(3).
Rotting in an old src tree since: March 2005
This commit is contained in:
parent
76b262c426
commit
205bd64894
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=174561
@ -45,6 +45,8 @@ __BEGIN_DECLS
|
||||
|
||||
double cabs(double complex);
|
||||
float cabsf(float complex);
|
||||
double carg(double complex);
|
||||
float cargf(float complex);
|
||||
double cimag(double complex);
|
||||
float cimagf(float complex);
|
||||
long double cimagl(long double complex);
|
||||
|
@ -38,8 +38,8 @@ COMMON_SRCS= b_exp.c b_log.c b_tgamma.c \
|
||||
e_sinh.c e_sinhf.c e_sqrt.c e_sqrtf.c fenv.c \
|
||||
k_cos.c k_cosf.c k_rem_pio2.c k_sin.c k_sinf.c \
|
||||
k_tan.c k_tanf.c \
|
||||
s_asinh.c s_asinhf.c s_atan.c s_atanf.c s_cbrt.c s_cbrtf.c \
|
||||
s_ceil.c s_ceilf.c s_ceill.c \
|
||||
s_asinh.c s_asinhf.c s_atan.c s_atanf.c s_carg.c s_cargf.c \
|
||||
s_cbrt.c s_cbrtf.c s_ceil.c s_ceilf.c s_ceill.c \
|
||||
s_copysign.c s_copysignf.c s_cos.c s_cosf.c s_erf.c s_erff.c \
|
||||
s_exp2.c s_exp2f.c s_expm1.c s_expm1f.c s_fabsf.c s_fdim.c \
|
||||
s_finite.c s_finitef.c \
|
||||
@ -106,7 +106,7 @@ MLINKS+=asin.3 asinf.3
|
||||
MLINKS+=asinh.3 asinhf.3
|
||||
MLINKS+=atan.3 atanf.3
|
||||
MLINKS+=atanh.3 atanhf.3
|
||||
MLINKS+=atan2.3 atan2f.3
|
||||
MLINKS+=atan2.3 atan2f.3 atan2.3 carg.3 atan2.3 cargf.3
|
||||
MLINKS+=ceil.3 ceilf.3 ceil.3 ceill.3
|
||||
MLINKS+=cimag.3 cimagf.3 cimag.3 cimagl.3 \
|
||||
cimag.3 conj.3 cimag.3 conjf.3 cimag.3 conjl.3 \
|
||||
|
@ -28,13 +28,15 @@
|
||||
.\" from: @(#)atan2.3 5.1 (Berkeley) 5/2/91
|
||||
.\" $FreeBSD$
|
||||
.\"
|
||||
.Dd January 14, 2005
|
||||
.Dd December 12, 2007
|
||||
.Dt ATAN2 3
|
||||
.Os
|
||||
.Sh NAME
|
||||
.Nm atan2 ,
|
||||
.Nm atan2f
|
||||
.Nd arc tangent functions of two variables
|
||||
.Nm atan2f ,
|
||||
.Nm carg ,
|
||||
.Nm cargf
|
||||
.Nd arc tangent and complex phase angle functions
|
||||
.Sh LIBRARY
|
||||
.Lb libm
|
||||
.Sh SYNOPSIS
|
||||
@ -43,6 +45,10 @@
|
||||
.Fn atan2 "double y" "double x"
|
||||
.Ft float
|
||||
.Fn atan2f "float y" "float x"
|
||||
.Ft double
|
||||
.Fn carg "double complex z"
|
||||
.Ft float
|
||||
.Fn cargf "float complex z"
|
||||
.Sh DESCRIPTION
|
||||
The
|
||||
.Fn atan2
|
||||
@ -52,6 +58,29 @@ functions compute the principal value of the arc tangent of
|
||||
.Fa y/ Ns Ar x ,
|
||||
using the signs of both arguments to determine the quadrant of
|
||||
the return value.
|
||||
.ie '\*[.T]'utf8' \{\
|
||||
. ds Th \[*h]
|
||||
.\}
|
||||
.el \{\
|
||||
. ds Th theta
|
||||
.\}
|
||||
.Pp
|
||||
The
|
||||
.Fn carg
|
||||
and
|
||||
.Fn cargf
|
||||
functions compute the complex argument (or phase angle) of
|
||||
.Fa z .
|
||||
The complex argument is the number \*(Th such that
|
||||
.Li z = r * e^(I * \*(Th) ,
|
||||
where
|
||||
.Li r = cabs(z) .
|
||||
The call
|
||||
.Li carg(z)
|
||||
is equivalent to
|
||||
.Li atan2(cimag(z), creal(z)) ,
|
||||
and similarly for
|
||||
.Fn cargf .
|
||||
.Sh RETURN VALUES
|
||||
The
|
||||
.Fn atan2
|
||||
@ -169,6 +198,7 @@ r := \(sr(x\(**x+y\(**y);\0\0if r = 0 then x := copysign(1,x);
|
||||
.Xr acos 3 ,
|
||||
.Xr asin 3 ,
|
||||
.Xr atan 3 ,
|
||||
.Xr cabs 3 ,
|
||||
.Xr cos 3 ,
|
||||
.Xr cosh 3 ,
|
||||
.Xr math 3 ,
|
||||
@ -178,6 +208,10 @@ r := \(sr(x\(**x+y\(**y);\0\0if r = 0 then x := copysign(1,x);
|
||||
.Xr tanh 3
|
||||
.Sh STANDARDS
|
||||
The
|
||||
.Fn atan2
|
||||
function conforms to
|
||||
.Fn atan2 ,
|
||||
.Fn atan2f ,
|
||||
.Fn carg ,
|
||||
and
|
||||
.Fn cargf
|
||||
functions conform to
|
||||
.St -isoC .
|
||||
|
@ -28,7 +28,7 @@
|
||||
.\" from: @(#)hypot.3 6.7 (Berkeley) 5/6/91
|
||||
.\" $FreeBSD$
|
||||
.\"
|
||||
.Dd January 14, 2005
|
||||
.Dd December 12, 2007
|
||||
.Dt HYPOT 3
|
||||
.Os
|
||||
.Sh NAME
|
||||
@ -118,6 +118,7 @@ the
|
||||
disappear when it turns out to be irrelevant, as it does in
|
||||
.Fn hypot "\*(If" "\*(Na" .
|
||||
.Sh SEE ALSO
|
||||
.Xr carg 3 ,
|
||||
.Xr math 3 ,
|
||||
.Xr sqrt 3
|
||||
.Sh HISTORY
|
||||
|
38
lib/msun/src/s_carg.c
Normal file
38
lib/msun/src/s_carg.c
Normal file
@ -0,0 +1,38 @@
|
||||
/*-
|
||||
* Copyright (c) 2005 David Schultz <das@FreeBSD.ORG>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
#include <complex.h>
|
||||
#include <math.h>
|
||||
|
||||
double
|
||||
carg(double complex z)
|
||||
{
|
||||
|
||||
return (atan2(cimag(z), creal(z)));
|
||||
}
|
38
lib/msun/src/s_cargf.c
Normal file
38
lib/msun/src/s_cargf.c
Normal file
@ -0,0 +1,38 @@
|
||||
/*-
|
||||
* Copyright (c) 2005 David Schultz <das@FreeBSD.ORG>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
__FBSDID("$FreeBSD$");
|
||||
|
||||
#include <complex.h>
|
||||
#include <math.h>
|
||||
|
||||
float
|
||||
cargf(float complex z)
|
||||
{
|
||||
|
||||
return (atan2f(cimagf(z), crealf(z)));
|
||||
}
|
Loading…
Reference in New Issue
Block a user