Added ceil and floor methods

Author: castarco

README.md

@@ -28,7 +28,7 @@ composer.json file the following text:
 ```json
 {
     "require": {
-        "litipk/php-bignumbers": "0.5.1"
+        "litipk/php-bignumbers": "0.6.0"
     }
 }
 ```
@@ -37,9 +37,9 @@ composer.json file the following text:
 
 ```php
 <?php
-  
+
   use \Litipk\BigNumbers\Decimal as Decimal;
-  
+
   /**
    * There are many ways to create Decimal objects.
    *
@@ -52,10 +52,10 @@ composer.json file the following text:
    *
    *   Decimal::create // this method works as methods fromType, but is more flexible
    */
-  
+
   $ten = Decimal::fromInteger(10);
   $two = Decimal::fromString('2.0');
-  
+
   /**
    * At this moment there are few binary operators
    * that we can use with Decimal objects:
@@ -78,7 +78,7 @@ composer.json file the following text:
    * $d1->round($scale);
    * $d1->additiveInverse();
    */
-  
+
   $five  = Decimal::fromInteger(-5)->abs();
   $six   = Decimal::fromInteger(6)->abs();
 
@@ -98,7 +98,7 @@ composer.json file the following text:
    * $d1->isInfinite();
    * $d1->isNaN();
    */
-  
+
   $zero = Decimal::fromInteger(0);
   $zero->isZero(); // Returns true
 
@@ -112,15 +112,3 @@ composer.json file the following text:
 The documentation is incomplete, if you want to use
 all the features of this package, you can see which
 public methods are declared in the Decimal class.
-
-
-## TODO List
-
-- [ ] Create the **Integer** class.
-- [ ] Create the **Rational** class.
-- [ ] Create the **Complex** class.
-- [X] Add the *pow* method.
-
-
-[![Bitdeli Badge](https://d2weczhvl823v0.cloudfront.net/Litipk/php-bignumbers/trend.png)](https://bitdeli.com/free "Bitdeli Badge")
-

src/Decimal.php

@@ -143,12 +143,7 @@ public static function fromFloat($fltValue, $scale = null)
             $scale;
 
         return new Decimal(
-            number_format(
-                $fltValue,
-                $dec_scale,
-                '.',
-                ''
-            ),
+            number_format($fltValue, $dec_scale, '.', ''),
             $dec_scale
         );
     }
@@ -567,6 +562,51 @@ public function round($scale = 0)
         return self::fromString(self::innerRound($this->value, $scale));
     }
 
+    /**
+     * "Ceils" the Decimal to have at most $scale digits after the point
+     * @param  integer $scale
+     * @return Decimal
+     */
+    public function ceil($scale = 0)
+    {
+        if ($scale >= $this->scale) {
+            return $this;
+        }
+
+        $rounded = bcadd($this->value, '0', $scale);
+
+        $rlen = strlen($rounded);
+        $tlen = strlen($this->value);
+
+        $mustCeil = false;
+        for ($i=$tlen-1; $i >= $rlen; $i--) {
+            if ((int)$this->value[$i] > 0) {
+                $mustCeil = true;
+                break;
+            }
+        }
+
+        if ($mustCeil) {
+            $rounded = bcadd($rounded, bcpow('10', -$scale, $scale), $scale);
+        }
+
+        return self::fromString($rounded, $scale);
+    }
+
+    /**
+     * "Floors" the Decimal to have at most $scale digits after the point
+     * @param  integer $scale
+     * @return Decimal
+     */
+    public function floor($scale = 0)
+    {
+        if ($scale >= $this->scale) {
+            return $this;
+        }
+
+        return self::fromString(bcadd($this->value, '0', $scale));
+    }
+
     /**
      * Returns the absolute value (always a positive number)
      * @return Decimal
@@ -744,7 +784,7 @@ protected static function paramsValidation($value, $scale)
     /**
      * @return string
      */
-    private static function normalizeSign($sign) 
+    private static function normalizeSign($sign)
     {
         if ($sign==='+') {
             return '';

src/InfiniteDecimal.php

@@ -236,6 +236,26 @@ public function round($scale = 0)
     	return $this;
     }
 
+    /**
+     * "Ceils" the Decimal to have at most $scale digits after the point
+     * @param  integer $scale
+     * @return Decimal
+     */
+    public function ceil($scale = 0)
+    {
+    	return $this;
+    }
+
+    /**
+     * "Floors" the Decimal to have at most $scale digits after the point
+     * @param  integer $scale
+     * @return Decimal
+     */
+    public function floor($scale = 0)
+    {
+    	return $this;
+    }
+
     /**
      * @return boolean
      */