Auswertung Experiment

Database tüddelei
DBHanlder läuft gut für DIESE Datanbank struktur...
App begonnen aber weit entfernt von gutem Stand

Libs/mat2tikz/test/private/calculateMD5Hash.m

@@ -0,0 +1,35 @@
+function hash = calculateMD5Hash(filename)
+% CALCULATEMD5HASH calculate a MD5 hash of a file
+%
+% This functionality is built-in into Octave but uses Java in MATLAB.
+
+    switch getEnvironment
+        case 'Octave'
+            hash = md5sum(filename);
+
+        case 'MATLAB'
+            % There are some MD5 implementations in MATLAB, but those
+            % tend to be slow and licensing is unclear.
+            % Rolling our own implementation is unwanted, especially since this
+            % is a  cryptographic hash, even though its security has been
+            % broken. Instead we make use of the Java libraries.
+            % Unless the "-nojvm" flag is specified, this should work well.
+            
+            MD5 = java.security.MessageDigest.getInstance('MD5');
+                        
+            % Open the file
+            fid = fopen(filename, 'r');
+            
+            % Make sure fid is closed
+            finally_close = onCleanup(@()fclose(fid));
+            
+            % Faster file digest based on code by Jan Simon as in 
+            % http://www.mathworks.com/matlabcentral/fileexchange/31272-datahash
+            data = fread(fid, '*uint8');
+            MD5.update(data);
+            
+            hash = reshape(dec2hex(typecast(MD5.digest(),'uint8')).', 1, 32);
+    end
+
+    hash = lower(hash);
+end