annotate chordtools/degree2interval.m @ 1:8973548174c1 tip

adding tools to repo

%
% DEGREE2INTERVAL
% 
% [interval,success,errormessage] = degree2interval(degree,accidentals,{verbose})
% 
% Converts a degree and accidental pair to an interval string.
% 
% Success = 1 if degree converted correctly, 0 otherwise.
% 
% If optional argument 'verbose' is 1, function prints any errormessage to 
% the screen.
% 
% returns:  interval (string)
%           success (boolean)
%           errormessage (string)
%
% Author: Christopher Harte, March 2009
% 
% Copyright: Centre for Digital Music, Queen Mary University of London 2005 
%
% This file is part of the C4DM Chord Toolkit V2.0 
%
% The C4DM Chord Toolkit is free software; you can redistribute it and/or 
% modify it under the terms of the GNU General Public License as published 
% by the Free Software Foundation; either version 2 of the License, or
% (at your option) any later version.
%
% The C4DM Chord Toolkit 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 the C4DM Toolkit; if not, write to the Free Software
% Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

%		
function [interval,success,errormessage] = degree2interval(degree,accidentals, verbose)

% set verbose default to 0
if nargin < 3
    verbose = 0;
end

errormessage = '';


success = 1;
interval = '';


if accidentals >=1
   % then the degree is either a natural or has a number of sharps 
    if accidentals ~= 0
        for index = 1:accidentals 
            interval = [interval '#'];
        end
    end
    
else
    % then the degree has a number of flats
    
    for index = 1:abs(accidentals) 
   
        interval = [interval 'b'];
    end
    
end

if isnumeric(degree)
    
    degreestring = num2str(degree);
    interval = [interval degreestring];
    
else
   success = 0;
   errormessage = 'Error in degree2interval: incorrect degree';
end
    
if (success == 0) && (verbose == 1)   
    fprintf(1,errormessage);
end