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