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##
# @file binary-operator.R
# @brief R file implementing binary operators
#
# @author Christophe Dutang
#
#
#
# The new BSD License is applied to this software.
# Copyright (c) 2022 Christophe Dutang.
# Christophe Dutang, see http://dutangc.free.fr
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# - Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# - Redistributions in binary form must reproduce the above
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#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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#
#
#############################################################################
### binary operators
###
### R functions
###
int2bit <- function(x)
as.numeric(intToBits(x))
bit2int <- function(x)
sum(x * 2^(1:length(x)-1))
bit2unitreal <- function(x) #radical inverse function in base 2
sum(x / 2^(1:length(x)))
oplus <- function(x,y)
{
stopifnot(NCOL(x)==1)
stopifnot(NCOL(y)==1)
if(length(x) > length(y))
y <- c(y, rep(0, length(x)-length(y)))
if(length(x) < length(y))
x <- c(x, rep(0, length(y)-length(x)))
(x+y) %% 2
}
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