Apply some minor improves on CFFIndex

src/hb-ot-cff-common.hh

@@ -92,9 +92,7 @@ struct CFFIndex
   static unsigned int calculate_serialized_size (unsigned int offSize_, unsigned int count,
 						 unsigned int dataSize)
   {
-    if (count == 0)
-      return COUNT::static_size;
-    else
+    if (count == 0) return COUNT::static_size;
     return min_size + calculate_offset_array_size (offSize_, count) + dataSize;
   }
 
@@ -159,9 +157,7 @@ struct CFFIndex
     byteArray.init ();
     byteArray.resize (buffArray.length);
     for (unsigned int i = 0; i < byteArray.length; i++)
-    {
       byteArray[i] = byte_str_t (buffArray[i].arrayZ, buffArray[i].length);
-    }
     bool result = this->serialize (c, offSize_, byteArray);
     byteArray.fini ();
     return result;
@@ -192,43 +188,35 @@ struct CFFIndex
 
   unsigned int length_at (unsigned int index) const
   {
-    if (likely ((offset_at (index + 1) >= offset_at (index)) &&
-	        (offset_at (index + 1) <= offset_at (count))))
-      return offset_at (index + 1) - offset_at (index);
-    else
+    if (unlikely ((offset_at (index + 1) < offset_at (index)) ||
+	          (offset_at (index + 1) > offset_at (count))))
       return 0;
+    return offset_at (index + 1) - offset_at (index);
   }
 
   const unsigned char *data_base () const
-  { return (const unsigned char *)this + min_size + offset_array_size (); }
+  { return (const unsigned char *) this + min_size + offset_array_size (); }
 
   unsigned int data_size () const { return HBINT8::static_size; }
 
   byte_str_t operator [] (unsigned int index) const
   {
-    if (likely (index < count))
+    if (unlikely (index >= count)) return Null (byte_str_t);
     return byte_str_t (data_base () + offset_at (index) - 1, length_at (index));
-    else
-      return Null (byte_str_t);
   }
 
   unsigned int get_size () const
   {
-    if (this != &Null (CFFIndex))
-    {
+    if (this == &Null (CFFIndex)) return 0;
     if (count > 0)
       return min_size + offset_array_size () + (offset_at (count) - 1);
-      else
     return count.static_size;  /* empty CFFIndex contains count only */
   }
-    else
-      return 0;
-  }
 
   bool sanitize (hb_sanitize_context_t *c) const
   {
     TRACE_SANITIZE (this);
-    return_trace (likely ((count.sanitize (c) && count == 0) || /* empty INDEX */
+    return_trace (likely ((c->check_struct (this) && count == 0) || /* empty INDEX */
 			  (c->check_struct (this) && offSize >= 1 && offSize <= 4 &&
 			   c->check_array (offsets, offSize, count + 1) &&
 			   c->check_array ((const HBUINT8*) data_base (), 1, max_offset () - 1))));