Allocate temp buffer instead of change the input string to avoid crush.

Signed-off-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14040 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 12 insertions, 13 deletions

diff --git a/MdePkg/Library/UefiLib/Console.c b/MdePkg/Library/UefiLib/Console.c
index dd4d5c544b..73f9915327 100644
--- a/MdePkg/Library/UefiLib/Console.c
+++ b/MdePkg/Library/UefiLib/Console.c
@@ -1,7 +1,7 @@
 /** @file

   This module provide help function for displaying unicode string.

 

-  Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>

+  Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>

   This program and the accompanying materials                          

   are licensed and made available under the terms and conditions of the BSD License         

   which accompanies this distribution.  The full text of the license may be found at        

@@ -332,8 +332,9 @@ UefiLibGetStringWidth (
     //

     // Advance to the null-terminator or to the first width directive

     //

-    for (;(String[Index] != NARROW_CHAR) && (String[Index] != WIDE_CHAR) && (String[Index] != 0);

-         Index++, Count = Count + IncrementValue) {

+    for (;(String[Index] != NARROW_CHAR) && (String[Index] != WIDE_CHAR) && (String[Index] != 0); Index++) {

+      Count = Count + IncrementValue;

+

       if (LimitLen && Count > MaxWidth) {

         break;

       }

@@ -347,7 +348,7 @@ UefiLibGetStringWidth (
     }

 

     if (LimitLen && Count > MaxWidth) {

-      *Offset = Index - 1;

+      *Offset = Index;

       break;

     }

 

@@ -370,13 +371,6 @@ UefiLibGetStringWidth (
     }

   } while (String[Index] != 0);

 

-  //

-  // Increment by one to include the null-terminator in the size

-  //

-  if (!LimitLen) {

-    Count++;

-  }

-

   return Count * sizeof (CHAR16);

 }

 

@@ -420,6 +414,7 @@ CreatePopUp (
   UINTN                            Length;

   CHAR16                           *Line;

   UINTN                            EventIndex;

+  CHAR16                           *TmpString;

 

   //

   // Determine the length of the longest line in the popup and the the total 

@@ -520,10 +515,14 @@ CreatePopUp (
       // Length > MaxLength

       //

       UefiLibGetStringWidth (String, TRUE, MaxLength, &Length);

-      String[Length] = L'\0';

+      TmpString = AllocateZeroPool ((Length + 1) * sizeof (CHAR16));

+      ASSERT (TmpString != NULL);

+      StrnCpy(TmpString, String, Length - 3);

+      StrCat (TmpString, L"...");

 

       ConOut->SetCursorPosition (ConOut, Column + 1, Row++);

-      ConOut->OutputString (ConOut, String);

+      ConOut->OutputString (ConOut, TmpString);

+      FreePool (TmpString);

     }

     NumberOfLines--;

   }