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Implement cproj{,f,l}().
This commit is contained in:
David Schultz
parent
419859bd08
commit
5e9470f1d5
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=181377
@ -56,6 +56,10 @@ double complex conj(double complex) __pure2;
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float complex conjf(float complex) __pure2;
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long double complex
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conjl(long double complex) __pure2;
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float complex cprojf(float complex) __pure2;
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double complex cproj(double complex) __pure2;
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long double complex
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cprojl(long double complex) __pure2;
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double creal(double complex) __pure2;
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float crealf(float complex) __pure2;
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long double creall(long double complex) __pure2;
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@ -87,7 +87,8 @@ COMMON_SRCS+= s_copysignl.c s_fabsl.c s_llrintl.c s_lrintl.c s_modfl.c
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COMMON_SRCS+= e_acosl.c e_asinl.c e_atan2l.c e_fmodl.c \
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e_hypotl.c e_remainderl.c e_sqrtl.c \
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invtrig.c k_cosl.c k_sinl.c k_tanl.c \
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s_atanl.c s_ceill.c s_cosl.c s_csqrtl.c s_exp2l.c s_floorl.c s_fmal.c \
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s_atanl.c s_ceill.c s_cosl.c s_cprojl.c s_csqrtl.c s_exp2l.c \
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s_floorl.c s_fmal.c \
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s_frexpl.c s_logbl.c s_nanl.c s_nextafterl.c s_nexttoward.c \
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s_remquol.c s_rintl.c s_scalbnl.c \
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s_sinl.c s_tanl.c s_truncl.c w_cabsl.c
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@ -95,7 +96,7 @@ COMMON_SRCS+= e_acosl.c e_asinl.c e_atan2l.c e_fmodl.c \
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# C99 complex functions
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COMMON_SRCS+= s_cimag.c s_cimagf.c s_cimagl.c s_conj.c s_conjf.c s_conjl.c \
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s_creal.c s_crealf.c s_creall.c
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s_cproj.c s_cprojf.c s_creal.c s_crealf.c s_creall.c
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# FreeBSD's C library supplies these functions:
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#COMMON_SRCS+= s_fabs.c s_frexp.c s_isnan.c s_ldexp.c s_modf.c
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@ -131,6 +132,7 @@ MLINKS+=atan2.3 atan2f.3 atan2.3 atan2l.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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cimag.3 cproj.3 cimag.3 cprojf.3 cimag.3 cprojl.3 \
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cimag.3 creal.3 cimag.3 crealf.3 cimag.3 creall.3
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MLINKS+=copysign.3 copysignf.3 copysign.3 copysignl.3
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MLINKS+=cos.3 cosf.3 cos.3 cosl.3
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@ -214,4 +214,7 @@ FBSD_1.1 {
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atan2l;
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atanl;
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cargl;
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cproj;
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cprojf;
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cprojl;
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};
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@ -24,12 +24,13 @@
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.\"
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.\" $FreeBSD$
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.\"
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.Dd August 7, 2004
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.Dd August 7, 2008
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.Dt CIMAG 3
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.Os
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.Sh NAME
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.Nm cimag , cimagf , cimagl ,
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.Nm conj , conjf , conjl ,
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.Nm cproj , cprojf , cprojl ,
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.Nm creal , crealf , creall
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.Nd "functions to manipulate complex numbers"
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.Sh LIBRARY
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@ -48,6 +49,12 @@
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.Fn conjf "float complex z"
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.Ft "long double complex"
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.Fn conjl "long double complex z"
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.Ft "double complex"
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.Fn cproj "double complex z"
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.Ft "float complex"
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.Fn cprojf "float complex z"
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.Ft "long double complex"
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.Fn cprojl "long double complex z"
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.Ft double
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.Fn creal "double complex z"
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.Ft float
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@ -63,6 +70,10 @@ denote the complex number
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.Fa z .
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.Pp
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The
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.Fn creal
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functions return the real part
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.Fa a ,
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and the
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.Fn cimag
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functions return the imaginary part
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.Fa b .
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@ -75,13 +86,23 @@ functions return the complex conjugate
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.Sm on
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.Pp
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The
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.Fn creal
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functions return the real part
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.Fa a .
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.Fn cproj
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functions return the projection onto the Riemann sphere.
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If
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.Fa z
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contains an infinite component, then the result is
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.Fa \*(If \*(Pm 0 Ns * Ns Em i ,
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where the (zero) imaginary part of the result has the same sign as
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.Fa b .
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Otherwise, the result is
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.Fa z .
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.Pp
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These functions do not signal any floating point exceptions.
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.Sh STANDARDS
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The
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.Fn cimag ,
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.Fn conj
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.Fn conj ,
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.Fn cproj ,
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and
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.Fn creal
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functions conform to
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@ -94,3 +115,7 @@ and
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.Fn creal
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functions first appeared in
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.Fx 5.3 .
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The
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.Fn cproj
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functions appeared in
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.Fx 8.0.
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47
lib/msun/src/s_cproj.c
Normal file
47
lib/msun/src/s_cproj.c
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@ -0,0 +1,47 @@
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/*-
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* Copyright (c) 2008 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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#include "math_private.h"
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double complex
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cproj(double complex z)
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{
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if (!isinf(creal(z)) && !isinf(cimag(z)))
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return (z);
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else
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return (cpack(INFINITY, copysign(0.0, cimag(z))));
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}
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#if LDBL_MANT_DIG == 53
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__weak_reference(cproj, cprojl);
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#endif
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43
lib/msun/src/s_cprojf.c
Normal file
43
lib/msun/src/s_cprojf.c
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@ -0,0 +1,43 @@
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/*-
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* Copyright (c) 2008 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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#include "math_private.h"
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float complex
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cprojf(float complex z)
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{
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if (!isinf(crealf(z)) && !isinf(cimagf(z)))
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return (z);
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else
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return (cpackf(INFINITY, copysignf(0.0, cimagf(z))));
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}
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43
lib/msun/src/s_cprojl.c
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43
lib/msun/src/s_cprojl.c
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@ -0,0 +1,43 @@
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/*-
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* Copyright (c) 2008 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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#include "math_private.h"
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long double complex
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cprojl(long double complex z)
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{
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if (!isinf(creall(z)) && !isinf(cimagl(z)))
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return (z);
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else
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return (cpackl(INFINITY, copysignl(0.0, cimagl(z))));
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}
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