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// This is a component for LinuxCNC HAL
// Copyright 2006 John Kasunich <jmkasunich at sourceforge dot net>
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of version 2 of the GNU General
// Public License as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
component abs "Compute the absolute value and sign of the input signal";
pin in float in "Analog input value" ;
pin out float out "Analog output value, always positive";
pin out bit sign "Sign of input, false for positive, true for negative" ;
pin out bit is_positive "TRUE if input is positive, FALSE if input is 0 or negative";
pin out bit is_negative "TRUE if input is negative, FALSE if input is 0 or positive";
function _;
license "GPL";
author "John Kasunich";
;;
FUNCTION(_) {
double tmp = in;
if ( tmp >= 0.0 ) {
sign = 0;
out = tmp;
} else {
sign = 1;
out = -tmp;
}
if (tmp > 0.000001) is_positive = 1;
else is_positive = 0;
if (tmp < -0.000001) is_negative = 1;
else is_negative = 0;
}
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