Remove build and data folders, move tests and utils to the base of the source tree

utils/matlab/libs/geoFunctions/roundn.m

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+function [x,msg] = roundn(x,n)
+
+% ROUNDN  Rounds input data at specified power of 10
+%
+%  y = ROUNDN(x) rounds the input data x to the nearest hundredth.
+%
+%  y = ROUNDN(x,n) rounds the input data x at the specified power
+%  of tens position.  For example, n = -2 rounds the input data to
+%  the 10E-2 (hundredths) position.
+%
+%  [y,msg] = ROUNDN(...) returns the text of any error condition
+%  encountered in the output variable msg.
+%
+%  See also ROUND
+
+% Written by:  E. Byrns, E. Brown
+% Revision: 1.9    Date: 2002/03/20 21:26:19
+%
+% GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
+% This file is part of GNSS-SDR.
+%
+% SPDX-FileCopyrightText: 1996-2002 Systems Planning and Analysis, Inc. and The MathWorks, Inc.
+% SPDX-License-Identifier: GPL-3.0-or-later
+
+msg = [];   %  Initialize output
+
+if nargin == 0
+    error('Incorrect number of arguments')
+elseif nargin == 1
+    n = -2;
+end
+
+%  Test for scalar n
+
+if max(size(n)) ~= 1
+    msg = 'Scalar accuracy required';
+    if nargout < 2;  error(msg);  end
+    return
+elseif ~isreal(n)
+    warning('Imaginary part of complex N argument ignored')
+    n = real(n);
+end
+
+%  Compute the exponential factors for rounding at specified
+%  power of 10.  Ensure that n is an integer.
+
+factors  = 10 ^ (fix(-n));
+
+%  Set the significant digits for the input data
+
+x = round(x * factors) / factors;