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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) INRIA
// Copyright (C) DIGITEO - 2011 - Allan CORNET
//
// 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 e = nextpow2(n)
[lhs, rhs] = argn(0);
if rhs <> 1 then
error(msprintf(gettext("%s: Wrong number of input argument(s): %d expected.\n"),"nextpow2", 1));
end
n = abs(n);
kf = find(~isnan(n)&n<>%inf);
e = n;
f = zeros(n);
[f(kf), e(kf)] = frexp(n(kf));
k = find(f==0.5); // n(k) is a power of 2
e(k) = e(k)-1;
endfunction
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