christopherh@1: %
christopherh@1: % PARSEINTERVALS
christopherh@1: % 
christopherh@1: % [parintervals, success, errormessage] = parseintervals(interval_list, {verbose})
christopherh@1: % 
christopherh@1: % Parses a comma delimited list of intervals to an array of degrees, their 
christopherh@1: % associated accidentals and whether or not they are present (presence 
christopherh@1: % denoted by a '*' in front of an interval in the input interval_list). 
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 parseinterval
christopherh@1: % 
christopherh@1: % returns:  intervals     (array of int: [degree,accidental,present])
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 [parintervals, success, errormessage] = parseintervals(interval_list, verbose)
christopherh@1: 
christopherh@1: % set verbose default to 0
christopherh@1: if nargin < 2
christopherh@1:     verbose = 0;
christopherh@1: end
christopherh@1: 
christopherh@1: errormessage = '';
christopherh@1: 
christopherh@1: ilength = length(interval_list);
christopherh@1: 
christopherh@1: index = 1;
christopherh@1: 
christopherh@1: tempindex = 1;
christopherh@1: 
christopherh@1: tempstring = '';
christopherh@1: 
christopherh@1: success = 1;
christopherh@1: 
christopherh@1: parindex  = 1;
christopherh@1: 
christopherh@1: parintervals = [];
christopherh@1: 
christopherh@1: 
christopherh@1: while index <= ilength
christopherh@1:     
christopherh@1:    
christopherh@1:     while (interval_list(index) ~= ',')  
christopherh@1:         
christopherh@1:         tempstring(tempindex) = interval_list(index);
christopherh@1:         tempindex = tempindex +1;
christopherh@1:         index = index + 1;
christopherh@1:         
christopherh@1:         if(index > ilength)
christopherh@1:             break;
christopherh@1:         end
christopherh@1:         
christopherh@1:         if (interval_list(index) == ',') && (index == ilength)
christopherh@1:             success = 0;
christopherh@1:             errormessage = sprintf(['Error in parseintervals: interval list finishes with a comma "' interval_list '"\n']);
christopherh@1:         end
christopherh@1:             
christopherh@1:             
christopherh@1:     end
christopherh@1:     
christopherh@1:         [parintervals(parindex,1),parintervals(parindex,2),parintervals(parindex,3),ok, error] = parseinterval(tempstring);
christopherh@1:         % concatenate error messages if there are any...
christopherh@1:         errormessage = [errormessage error];
christopherh@1:         
christopherh@1:         if(ok == 1)
christopherh@1:             tempstring = '';
christopherh@1:             tempindex = 1;
christopherh@1:             parindex = parindex + 1;
christopherh@1:             index = index + 1;
christopherh@1:         else
christopherh@1: 
christopherh@1:             errormessage = [errormessage sprintf(['Error in parseintervals: incorrect interval in list "' interval_list '"\n'])];
christopherh@1:             success = 0;
christopherh@1:             index = ilength +1;            
christopherh@1:         end
christopherh@1:     
christopherh@1:     
christopherh@1: end
christopherh@1: 
christopherh@1: if (success == 0) && (verbose == 1)
christopherh@1: 
christopherh@1:     fprintf(1,errormessage)
christopherh@1:     
christopherh@1: end    
christopherh@1: 
christopherh@1: 
christopherh@1:     
christopherh@1:               
christopherh@1: 
christopherh@1: 
christopherh@1: 
christopherh@1: 
christopherh@1: 
christopherh@1: