MDL-12503 Loguniform merging from head

question/type/calculated/questiontype.php

@@ -669,62 +669,12 @@ class question_calculated_qtype extends question_dataset_dependent_questiontype
         }
         if ($regs[1] == 'uniform') {
             $nbr = $regs[2] + ($regs[3]-$regs[2])*mt_rand()/mt_getrandmax();
-            return round($nbr, $regs[4]);
+            return sprintf("%.".$regs[4]."f",$nbr);
 
         } else if ($regs[1] == 'loguniform') {
             $log0 = log(abs($regs[2])); // It would have worked the other way to
             $nbr = exp($log0 + (log(abs($regs[3])) - $log0)*mt_rand()/mt_getrandmax());
-
-            // Reformat according to the precision $regs[4]:
-
-            // Determine the format 0.[1-9][0-9]* for the nbr...
-            $p10 = 0;
-            while ($nbr < 1) {
-                --$p10;
-                $nbr *= 10;
-            }
-            while ($nbr >= 1) {
-                ++$p10;
-                $nbr /= 10;
-            }
-            // ... and have the nbr rounded off to the correct length
-            $nbr = round($nbr, $regs[4]);
-
-            // Have the nbr written on a suitable format,
-            // Either scientific or plain numeric
-            if (-2 > $p10 || 4 < $p10) {
-                // Use scientific format:
-                $eX = 'e'.--$p10;
-                $nbr *= 10;
-                if (1 == $regs[4]) {
-                    $nbr = $nbr.$eX;
-                } else {
-                    // Attach additional zeros at the end of $nbr,
-                    $nbr .= (1==strlen($nbr) ? '.' : '')
-                            . '00000000000000000000000000000000000000000x';
-                    $nbr = substr($nbr, 0, $regs[4] +1).$eX;
-                }
-            } else {
-                // Stick to plain numeric format
-                $nbr *= "1e$p10";
-                if (0.1 <= $nbr / "1e$regs[4]") {
-                    $nbr = $nbr;
-                } else {
-                    // Could be an idea to add some zeros here
-                    $nbr .= (ereg('^[0-9]*$', $nbr) ? '.' : '')
-                            . '00000000000000000000000000000000000000000x';
-                    $oklen = $regs[4] + ($p10 < 1 ? 2-$p10 : 1);
-                    $nbr = substr($nbr, 0, $oklen);
-                }
-            }
-
-            // The larger of the values decide the sign in case the
-            // have equal different signs (which they really must not have)
-            if ($regs[2] + $regs[3] > 0) {
-                return $nbr;
-            } else {
-                return -$nbr;
-            }
+            return sprintf("%.".$regs[4]."f",$nbr);
 
         } else {
             error("The distribution $regs[1] caused problems");