Index: questiontype.php
===================================================================
RCS file: /cvsroot/moodle/moodle/question/type/shortanswer/questiontype.php,v
retrieving revision 1.20.2.8
diff -u -r1.20.2.8 questiontype.php
--- questiontype.php	28 Aug 2008 01:46:48 -0000	1.20.2.8
+++ questiontype.php	16 Nov 2008 19:59:54 -0000
@@ -181,12 +181,13 @@
     // ULPGC ecastro
     function check_response(&$question, &$state) {
         $answers = &$question->options->answers;
-        $testedstate = clone($state);
-        $teststate   = clone($state);
-        foreach($answers as $aid => $answer) {
-            $teststate->responses[''] = trim($answer->answer);
-            if($this->compare_responses($question, $testedstate, $teststate)) {
-                return $aid;
+        if(isset($state->responses[''])){
+            $trimmedresponse=trim(stripslashes_safe($state->responses['']));
+            foreach($answers as $aid => $answer) {
+                if($this->compare_string_with_wildcard($trimmedresponse,trim($answer->answer),
+                        !$question->options->usecase)) {
+                    return $aid;
+                }
             }
         }
         return false;
@@ -195,7 +196,7 @@
     function compare_responses($question, $state, $teststate) {
         if (isset($state->responses['']) && isset($teststate->responses[''])) {
             return $this->compare_string_with_wildcard(stripslashes_safe($state->responses['']),
-                $teststate->responses[''], !$question->options->usecase);
+                $teststate->responses[''], !$question->options->usecase, false);
         }
         return false;
     }
@@ -207,16 +208,20 @@
                 $answer->answer, !$question->options->usecase);
     }
 
-    function compare_string_with_wildcard($string, $pattern, $ignorecase) {
-        // Break the string on non-escaped asterisks.
-        $bits = preg_split('/(?<!\\\\)\*/', $pattern);
-        // Escape regexp special characters in the bits.
-        $excapedbits = array();
-        foreach ($bits as $bit) {
-            $excapedbits[] = preg_quote(str_replace('\*', '*', $bit));
+    function compare_string_with_wildcard($string, $pattern, $ignorecase, $usewildcard=true) {
+        if($usewildcard){
+            // Break the string on non-escaped asterisks.
+            $bits = preg_split('/(?<!\\\\)\*/', $pattern);
+            // Escape regexp special characters in the bits.
+            $excapedbits = array();
+            foreach ($bits as $bit) {
+                $excapedbits[] = preg_quote(str_replace('\*', '*', $bit));
+            }
+            // Put it back together to make the regexp.
+            $regexp = '|^' . implode('.*', $excapedbits) . '$|u';
+        } else {
+            $regexp = '|^' . preg_quote($pattern) . '$|u';
         }
-        // Put it back together to make the regexp.
-        $regexp = '|^' . implode('.*', $excapedbits) . '$|u';
 
         // Make the match insensitive if requested to.
         if ($ignorecase) {