FindandReplace(Inp)

function FindandReplace(Inp)
% **********************************************************************
%    File Name : FindandReplace
%    Author : Shanmugam Kannappan
%    Description : This is the function called when the 
%    "O.K" button is pressed from the FndRep_GUI.
%    This function takes model in which the signals to be replaced &
%    replaces the signal either from excel file or from editbox in
%    FndRep_GUI(String option)

%***********************************************************************
try
    mdl = bdroot; % Top level model name 
    mdlh = get_param(mdl,'Handle'); % Get the handle of the model
    Filename = get(mdlh ,'FileName');% Get the filename of the model(path & file name)
    fid = fopen(Filename,'r');% Open the model in read mode
    str = fread(fid, '*char')';% Read the content of the model & assign in a variable
    fclose(fid);% Close the file 
    [mdlPath] = fileparts(Filename);% Get the path & ceate a new directory called 'Old_model' if its not exist.
    if ~exist([mdlPath,'\Old_model'],'dir')
        mkdir([mdlPath,'\Old_model'])
    end
    close_system(Filename) % Close the model
    clear fid mdlh % clear the handles
    copyfile(Filename,[mdlPath,'\Old_model']) % Copy the current model to the directory('Old_Model') for safety purpose.
    delete(Filename) % delete the model
    if ~iscell(Inp) % if its not a cell(Excel option is selected)
        [Num,Text] = xlsread(Inp);% Read the strings from Excel sheet & replace one by one
        fid = fopen(Filename,'w+');% Open the file in write mode
        for i=1:size(Text,1)
            frewind(fid)
            fnd = Text{i,1};
            Rep = Text{i,2}; 
            str = regexprep(str, fnd, Rep); % Replace the Signals            
        end
        fprintf(fid, '%s', str); % Create a model
        fclose(fid); % Close the file
    else % String option is selected
            fid = fopen(Filename,'w+'); % Open the file in write mode
            frewind(fid)
            str = regexprep(str, Inp{1,1}, Inp{1,2}); % Replace the Signals 
            fprintf(fid, '%s', str); % Create a model
            fclose(fid); % Close the file
    end

        open_system(Filename) % open the model
catch % Current model is not saved
    msgbox('Please check the model is saved & open','Check the model','Error'); 
end
clc
clear