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mirror of git://sourceware.org/git/newlib-cygwin.git synced 2025-01-16 03:19:54 +08:00
Jeff Johnston bf5300eaee 2010-10-18 Marco Atzeri <marco_atzeri@yahoo.it>
* libm/Makefile.am: added complex functions documentation
        * libm/libm.texinfo: ditto
        * libm/complex/Makefile.am: Ditto
        * libm/complex/complex.tex: Ditto
        * libm/complex/(cabs.c, cacos.c, cacosh.c, carg.c,
        casin.c, casinh.c, catan.c, catanh.c, ccos.c, ccosh.c,
        cexp.c, cimag.c, clog.c, conj.c, cpow.c, cproj.c, creal.c,
        csin.c, csinh.c, csqrt.c, ctan.c, ctanh.c): Ditto
        * libm/Makefile.in: Regenerate
        * libm/complex/Makefile.in: Ditto
2010-10-18 22:40:24 +00:00

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/* $NetBSD: creal.c,v 1.2 2010/09/15 16:11:29 christos Exp $ */
/*
* Written by Matthias Drochner <drochner@NetBSD.org>.
* Public domain.
*
* imported and modified include for newlib 2010/10/03
* Marco Atzeri <marco_atzeri@yahoo.it>
*/
/*
FUNCTION
<<creal>>, <<crealf>>---real part
INDEX
creal
INDEX
crealf
ANSI_SYNOPSIS
#include <complex.h>
double creal(double complex <[z]>);
float crealf(float complex <[z]>);
DESCRIPTION
These functions compute the real part of <[z]>.
<<crealf>> is identical to <<creal>>, except that it performs
its calculations on <<floats complex>>.
RETURNS
The creal functions return the real part value.
PORTABILITY
<<creal>> and <<crealf>> are ISO C99
QUICKREF
<<creal>> and <<crealf>> are ISO C99
*/
#include <complex.h>
#include "../common/fdlibm.h"
double
creal(double complex z)
{
double_complex w = { .z = z };
return (REAL_PART(w));
}