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dabs.c
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C/C++ Source or Header
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1990-04-07
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2KB
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77 lines
/************************************************************************
* *
* N O T I C E *
* *
* Copyright Abandoned, 1987, Fred Fish *
* *
* This previously copyrighted work has been placed into the *
* public domain by the author (Fred Fish) and may be freely used *
* for any purpose, private or commercial. I would appreciate *
* it, as a courtesy, if this notice is left in all copies and *
* derivative works. Thank you, and enjoy... *
* *
* The author makes no warranty of any kind with respect to this *
* product and explicitly disclaims any implied warranties of *
* merchantability or fitness for any particular purpose. *
* *
************************************************************************
*/
/*
* FUNCTION
*
* dabs,fabs double precision absolute value
*
* KEY WORDS
*
* dabs
* fabs
* machine independent routines
* math libraries
*
* DESCRIPTION
*
* Returns absolute value of double precision number.
*
* The fabs routine is supplied for compatibility with unix
* libraries where for some bizarre reason, the double precision
* absolute value routine is called fabs.
*
* USAGE
*
* double dabs (x)
* double x;
*
* double fabs (x)
* double x;
*
* PROGRAMMER
*
* Fred Fish
*
*/
#include <stdio.h>
#include "pml.h"
static char funcname[] = "dabs";
double dabs (x)
double x;
{
DBUG_ENTER (funcname);
DBUG_3 ("dabsin", "arg %le", x);
if (x < 0.0) {
x = -x;
}
DBUG_3 ("dabsout", "result %le", x);
DBUG_RETURN (x);
}
double fabs (x)
double x;
{
return (dabs(x));
}