Fixed trimming of trailing zeros and dot (leaving trailing zeros when no dot is present). (#29)

Author: jimmy4o4

src/BCMathExtended/BC.php

@@ -55,15 +55,24 @@ public static function convertScientificNotationToString($number)
             } else {
                 $number = self::mul($pow, $regs[1], $scale);
             }
-            // remove unnecessary 0 from 0.000 is a 0
-            $number = rtrim($number, '0');
-            // if you remove 0 you must clean dot
-            $number = rtrim($number, '.');
+            // remove unnecessary 0 and dot from 0.000 is a 0
+            $number = self::trimTrailingZeroes($number);
         }
 
         return self::checkNumber($number);
     }
 
+    /**
+     * @param int|string|float $number
+     * @return void
+     */
+    private static function trimTrailingZeroes($number) {
+        if (false !== strpos($number, '.')) {
+            $number = rtrim($number, '0');
+        }
+        return rtrim($number, '.') ?: '0';
+    }
+
     /**
      * @param int|string|float $number
      * @return int
@@ -441,7 +450,7 @@ public static function floor($number)
      */
     private static function checkIsFloatCleanZeros(&$number)
     {
-        return false !== strpos($number = rtrim(rtrim($number, '0'), '.'), '.');
+        return false !== strpos($number = self::trimTrailingZeroes($number), '.');
     }
 
     /**

tests/Unit/BCTest.php

@@ -72,6 +72,7 @@ public function scientificNotationProvider()
                 '-7.491687627771507445838618797279002344648652959333491e+8',
             ],
             ['1.3333', '0.13333e+01'],
+            ['100', '1e+2'],
             // some rubbish..
             ['23', '23.1.23.0e+0..3123131'], //hmm
             ['345600000000', '3.456e11'],