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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) INRIA
// Copyright (C) 2008 - INRIA - Pierre MARECHAL
//
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution. The terms
// are also available at
// http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
function z = bitxor(x,y)
// BITXOR function
// Given x,y two positives integers this function returns the decimal number
// whose the binary form is the XOR of the binary representations of x and y
// -Inputs :
// x, y : scalars/vectors/matices of positives integers,
// x and y must have the same size
// -Output :
// z : scalar/vector/matrix
//
// P. Marechal, 5 Feb 2008
// - fix bug 2691 and 2692
// - Add argument check
// Check input arguments
// =========================================================================
rhs = argn(2);
if rhs <> 2 then
error(msprintf(gettext("%s: Wrong number of input argument(s): %d expected.\n"),"bitxor",2));
end
if typeof(x)<>typeof(y)
error(msprintf(gettext("%s: Wrong type for input arguments: Same types expected.\n"),"bitxor"));
end
if or(size(x)<>size(y)) then
error(msprintf(gettext("%s: Wrong size for input arguments: Same size expected.\n"),"bitxor"));
end
if isempty(x) & isempty(x)
z=[];
return
end
if (type(x)==1 & (x-floor(x)<>0 | x<0)) ..
| (type(x)==8 & (inttype(x)<10) ) ..
| (type(x)==17 & (type(x.entries<>1) | type(x.entries<>8)) & find(x.entries>0)<>[]) ..
| (type(x)<>1 & type(x)<>8 & type(x)<>17) then
error(msprintf(gettext("%s: Wrong type for input argument #%d: Scalar/matrix of unsigned integers expected.\n"),"bitxor",1));
end
if (type(y)==1 & (y-floor(y)<>0 | y<0)) ..
| (type(y)==8 & (inttype(y)<10) ) ..
| (type(y)==17 & (type(y.entries<>1) | type(y.entries<>8)) & find(y.entries>0)<>[]) ..
| (type(y)<>1 & type(y)<>8 & type(y)<>17) then
error(msprintf(gettext("%s: Wrong type for input argument #%d: Scalar/matrix of unsigned integers expected.\n"),"bitxor",2));
end
// Algorithm
// =========================================================================
for i=1:size(x,"*")
zbin = dec2bin([x(i);y(i)]);
zand = strcat((string(sum(asciimat(zbin)-48,1))));
zand = strsubst(zand,"2","0");
z(i) = bin2dec(zand);
end
// Result
// =========================================================================
if type(x)==8 then
select inttype(x)
case 11 then z = uint8(z);
case 12 then z = uint16(z);
case 14 then z = uint32(z);
end
end
z = matrix(z,size(x));
endfunction
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