Mauch MIREX 2010

%

%NOTE2FIFTHINFO find line of fifths natural-position and accidentals

% 

% [position, accidentals, success,errormessage] = note2fifthinfo(note,{verbose})

% 

% Converts a note string to a natural position on the line of fifths and its 

% corresponding number of sharps or flats. 

%

% *** NOTE! *** 

% Reference for natural positions on line of fifths for this function is F = 0.

% 

% Success = 1 if note converted correctly, 0 otherwise.

% 

% If optional argument 'verbose' is 1, function prints any errormessage to 

% the screen.

% 

% calls: parsenote

%

% returns:  position (integer)

%           accidentals (integer)

%           success (boolean)

%           errormessage (string)

% 

%

% Author: Christopher Harte,  September 2005

% 

% Copyright: Centre for Digital Music, Queen Mary University of London 2005 

%

% This file is part of the C4DM Chord Toolkit.  

%

% 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 [position,accidentals, success, errormessage] = note2fifthinfo(note, verbose)

% set verbose default to 0

if nargin < 3

   verbose = 0;

end

errormessage = '';

success = 1;

position = '';

accidentals = '';

[natural, accidentals, success, errormessage] = parsenote(note);

if success

    switch(natural)

        case 'F' 

            position = 0;

        case 'C' 

            position = 1;

        case 'G' 

            position = 2;

        case 'D' 

            position = 3;

        case 'A' 

            position = 4;

        case 'E' 

            position = 5;

        case 'B' 

            position = 6;

        otherwise

            errormessage = 'Error in note2fifthinfo: unrecognised natural';

            success=0;

    end

end

if (success == 0) && (verbose == 1)   

    fprintf(1,errormessage);

end