From f7375189b98902a385b97aa0f8dec8d62dd780c4 Mon Sep 17 00:00:00 2001
From: Alexey 'Cluster' Avdyukhin <clusterrr@clusterrr.com>
Date: Wed, 9 Nov 2022 00:23:06 +0400
Subject: Refactoring

---
 NesFile.cs | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

(limited to 'NesFile.cs')

diff --git a/NesFile.cs b/NesFile.cs
index 1c7bee0..8063d5b 100644
--- a/NesFile.cs
+++ b/NesFile.cs
@@ -933,11 +933,14 @@ namespace com.clusterrr.Famicom.Containers
         {
             int prgSizeUpPow2 = 1;
             int chrSizeUpPow2 = 1;
-            while (prgSizeUpPow2 < PRG.Length) prgSizeUpPow2 *= 2;
+            if (PRG.Length == 0)
+                prgSizeUpPow2 = 0; // Is it possible?
+            else
+                while (prgSizeUpPow2 < PRG.Length) prgSizeUpPow2 <<= 1;
             if (CHR.Length == 0)
                 chrSizeUpPow2 = 0;
             else
-                while (chrSizeUpPow2 < CHR.Length) chrSizeUpPow2 *= 2;
+                while (chrSizeUpPow2 < CHR.Length) chrSizeUpPow2 <<= 1;
             using (var md5 = MD5.Create())
             {
                 md5.TransformBlock(prg, 0, prg.Length, null, 0);
@@ -957,11 +960,14 @@ namespace com.clusterrr.Famicom.Containers
         {
             int prgSizeUpPow2 = 1;
             int chrSizeUpPow2 = 1;
-            while (prgSizeUpPow2 < PRG.Length) prgSizeUpPow2 *= 2;
+            if (PRG.Length == 0)
+                prgSizeUpPow2 = 0; // Is it possible?
+            else
+                while (prgSizeUpPow2 < PRG.Length) prgSizeUpPow2 <<= 1;
             if (CHR.Length == 0)
                 chrSizeUpPow2 = 0;
             else
-                while (chrSizeUpPow2 < CHR.Length) chrSizeUpPow2 *= 2;
+                while (chrSizeUpPow2 < CHR.Length) chrSizeUpPow2 <<= 1;
             using (var crc32 = new Crc32())
             {
                 crc32.TransformBlock(prg, 0, prg.Length, null, 0);
-- 
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