60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
/* $NetBSD: cabs.c,v 1.1 2007/08/20 16:01:30 drochner Exp $ */
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/*
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* Written by Matthias Drochner <drochner@NetBSD.org>.
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* Public domain.
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*
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* imported and modified include for newlib 2010/10/03
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* Marco Atzeri <marco_atzeri@yahoo.it>
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*/
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/*
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FUNCTION
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<<cabs>>, <<cabsf>>, <<cabsl>>---complex absolute-value
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INDEX
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cabs
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INDEX
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cabsf
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INDEX
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cabsl
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SYNOPSIS
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#include <complex.h>
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double cabs(double complex <[z]>);
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float cabsf(float complex <[z]>);
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long double cabsl(long double complex <[z]>);
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DESCRIPTION
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These functions compute compute the complex absolute value
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(also called norm, modulus, or magnitude) of <[z]>.
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<<cabsf>> is identical to <<cabs>>, except that it performs
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its calculations on <<float complex>>.
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<<cabsl>> is identical to <<cabs>>, except that it performs
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its calculations on <<long double complex>>.
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RETURNS
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The cabs* functions return the complex absolute value.
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PORTABILITY
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<<cabs>>, <<cabsf>> and <<cabsl>> are ISO C99
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QUICKREF
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<<cabs>>, <<cabsf>> and <<cabsl>> are ISO C99
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*/
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#include <complex.h>
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#include <math.h>
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double
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cabs(double complex z)
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{
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return hypot( creal(z), cimag(z) );
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}
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