From 81a108434041f6bed629123922772279d98d91a8 Mon Sep 17 00:00:00 2001
From: Hao Wu <hao.a.wu@intel.com>
Date: Tue, 15 Nov 2016 16:12:30 +0800
Subject: [PATCH] MdeModulePkg/UefiPxeBcDxe: Refine the CvtNum function logic

This commit refines the logic for the CvtNum function. It avoids using the
decrement operator '--' for array index to prevent possible mis-reports by
static code checkers.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: Ye Ting <ting.ye@intel.com>
Reviewed-by: Wu Jiaxin <jiaxin.wu@intel.com>
---
 MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcSupport.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcSupport.c b/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcSupport.c
index 0865ddd7cd..077905671e 100644
--- a/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcSupport.c
+++ b/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcSupport.c
@@ -132,11 +132,10 @@ CvtNum (
 {
   UINTN Remainder;
 
-  while (Length > 0) {
+  for (; Length > 0; Length--) {
     Remainder = Number % 10;
     Number /= 10;
-    Length--;
-    Buffer[Length] = (UINT8) ('0' + Remainder);
+    Buffer[Length - 1] = (UINT8) ('0' + Remainder);
   }
 }