christopherh@1: %
christopherh@1: %SHORT2QUALITY return the quality of a given shorthand string
christopherh@1: % 
christopherh@1: % [quality,success, errormessage] = short2quality(shorthand, {verbose})
christopherh@1: % 
christopherh@1: % Returns the quality of a given shorthand string. Quality values are from 
christopherh@1: % the enumeration:
christopherh@1: %
christopherh@1: % 0   Major
christopherh@1: % 1   Minor
christopherh@1: % 2   Diminished
christopherh@1: % 3   Augmented
christopherh@1: % 4   Suspended
christopherh@1: % 
christopherh@1: %
christopherh@1: % Success = 1 if symbols parsed correctly, 0 otherwise. 
christopherh@1: %
christopherh@1: % If optional argument 'verbose' is 1, function prints any errormessage to 
christopherh@1: % the screen.
christopherh@1: % 
christopherh@1: % calls:   
christopherh@1: % 
christopherh@1: % returns:  quality (integer)
christopherh@1: %           success  (boolean)  
christopherh@1: %           errormessage (string)
christopherh@1: %
christopherh@1: %
christopherh@1: % Author: Christopher Harte, March 2009
christopherh@1: % 
christopherh@1: % Copyright: Centre for Digital Music, Queen Mary University of London 2005 
christopherh@1: %
christopherh@1: % This file is part of the C4DM Chord Toolkit V2.0  
christopherh@1: %
christopherh@1: % The C4DM Chord Toolkit is free software; you can redistribute it and/or 
christopherh@1: % modify it under the terms of the GNU General Public License as published 
christopherh@1: % by the Free Software Foundation; either version 2 of the License, or
christopherh@1: % (at your option) any later version.
christopherh@1: %
christopherh@1: % The C4DM Chord Toolkit is distributed in the hope that it will be useful,
christopherh@1: % but WITHOUT ANY WARRANTY; without even the implied warranty of
christopherh@1: % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
christopherh@1: % GNU General Public License for more details.
christopherh@1: %
christopherh@1: % You should have received a copy of the GNU General Public License
christopherh@1: % along with the C4DM Toolkit; if not, write to the Free Software
christopherh@1: % Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
christopherh@1: 
christopherh@1: %
christopherh@1: function [quality,success,errormessage] = short2quality(shorthand,verbose)
christopherh@1: 
christopherh@1: if nargin < 2
christopherh@1:     verbose = 0;
christopherh@1: end
christopherh@1: 
christopherh@1: success = 1;
christopherh@1: errormessage = '';
christopherh@1: quality = '';
christopherh@1: 
christopherh@1: switch shorthand
christopherh@1:     
christopherh@1:         
christopherh@1:     % triads
christopherh@1:     case 'maj'
christopherh@1:         quality = 0;        
christopherh@1:     case 'min' 
christopherh@1:         quality = 1;        
christopherh@1:     case 'dim' 
christopherh@1:         quality = 2;    
christopherh@1:     case 'aug' 
christopherh@1:         quality = 3;
christopherh@1:         
christopherh@1:     % sevenths    
christopherh@1:     case 'maj7' 
christopherh@1:         quality = 0;
christopherh@1:     case 'min7' 
christopherh@1:         quality = 1;
christopherh@1:     case '7' 
christopherh@1:         quality = 0;        
christopherh@1:     case 'minmaj7' 
christopherh@1:         quality = 1;        
christopherh@1:     case 'dim7' 
christopherh@1:         quality = 2;
christopherh@1:     case 'hdim7'
christopherh@1:         quality = 2;
christopherh@1:  
christopherh@1:     % sixths
christopherh@1:     case 'maj6'
christopherh@1:         quality = 0;        
christopherh@1:     case 'min6' 
christopherh@1:         quality = 1;
christopherh@1: 
christopherh@1:     % ninths 
christopherh@1:  
christopherh@1:     case '9'
christopherh@1:         quality = 0;          
christopherh@1:     case 'maj9'
christopherh@1:         quality = 0;    
christopherh@1:     case 'min9'
christopherh@1:         quality = 1;    
christopherh@1: 
christopherh@1:     % suspended
christopherh@1:     case 'sus4'
christopherh@1:         quality = 4;
christopherh@1:     case 'sus2'
christopherh@1:         quality = 4;
christopherh@1:         
christopherh@1:     otherwise
christopherh@1:         success = 0;
christopherh@1:         errormessage = ['Error in short2quality: unrecognised shorthand: ' shorthand];
christopherh@1: end
christopherh@1: 
christopherh@1:         
christopherh@1: if (success ==0) && (verbose == 1)
christopherh@1:     fprintf(1,errormessage);
christopherh@1: end