CryptoPkg: Refine type cast for pointer subtraction

[mirror_edk2.git] / CryptoPkg / Library / BaseCryptLib / SysCall / RuntimeMemAllocation.c

diff --git a/CryptoPkg/Library/BaseCryptLib/SysCall/RuntimeMemAllocation.c b/CryptoPkg/Library/BaseCryptLib/SysCall/RuntimeMemAllocation.c
index 19c30dc66d055695a93cefe2e58459827bfd272f..feaa37145e99cb7eb6e4e6e66978eaf2af13ba69 100644 (file)
--- a/CryptoPkg/Library/BaseCryptLib/SysCall/RuntimeMemAllocation.c
+++ b/CryptoPkg/Library/BaseCryptLib/SysCall/RuntimeMemAllocation.c
@@ -2,7 +2,7 @@
   Light-weight Memory Management Routines for OpenSSL-based Crypto\r
   Library at Runtime Phase.\r
 \r
-Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2009 - 2017, Intel Corporation. All rights reserved.<BR>\r
 This program and the accompanying materials\r
 are licensed and made available under the terms and conditions of the BSD License\r
 which accompanies this distribution.  The full text of the license may be found at\r
@@ -282,7 +282,7 @@ RuntimeFreeMem (
   UINTN  StartOffset;\r
   UINTN  StartPageIndex;\r
 \r
-  StartOffset    = (UINTN) ((UINT8 *)Buffer - mRTPageTable->DataAreaBase);\r
+  StartOffset    = (UINTN)Buffer - (UINTN)mRTPageTable->DataAreaBase;\r
   StartPageIndex = RT_SIZE_TO_PAGES (mRTPageTable->Pages[RT_SIZE_TO_PAGES(StartOffset)].StartPageOffset);\r
 \r
   while (StartPageIndex < mRTPageTable->PageCount) {\r
@@ -403,7 +403,7 @@ void *realloc (void *ptr, size_t size)
   //\r
   // Get Original Size of ptr\r
   //\r
-  StartOffset    = (UINTN) ((UINT8 *)ptr - mRTPageTable->DataAreaBase);\r
+  StartOffset    = (UINTN)ptr - (UINTN)mRTPageTable->DataAreaBase;\r
   StartPageIndex = RT_SIZE_TO_PAGES (mRTPageTable->Pages[RT_SIZE_TO_PAGES (StartOffset)].StartPageOffset);\r
   PageCount      = 0;\r
   while (StartPageIndex < mRTPageTable->PageCount) {\r