Add SetMemN() and ScanMemN() to the BaseMemoryLib class and all BaseMemoryLib implementations

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9517 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 37 insertions, 1 deletions

diff --git a/MdePkg/Library/BaseMemoryLibOptPei/ScanMem8Wrapper.c b/MdePkg/Library/BaseMemoryLibOptPei/ScanMem8Wrapper.c
index 2add7849cd..9efca5e02a 100644
--- a/MdePkg/Library/BaseMemoryLibOptPei/ScanMem8Wrapper.c
+++ b/MdePkg/Library/BaseMemoryLibOptPei/ScanMem8Wrapper.c
@@ -1,5 +1,5 @@
 /** @file

-  ScanMem8() implementation.

+  ScanMem8() and ScanMemN() implementation.

 

   The following BaseMemoryLib instances contain the same copy of this file:

 

@@ -60,3 +60,39 @@ ScanMem8 (
  

   return (VOID*)InternalMemScanMem8 (Buffer, Length, Value);

 }

+

+/**

+  Scans a target buffer for a UINTN sized value, and returns a pointer to the matching 

+  UINTN sized value in the target buffer.

+

+  This function searches target the buffer specified by Buffer and Length from the lowest

+  address to the highest address for a UINTN sized value that matches Value.  If a match is found,

+  then a pointer to the matching byte in the target buffer is returned.  If no match is found,

+  then NULL is returned.  If Length is 0, then NULL is returned.

+  

+  If Length > 0 and Buffer is NULL, then ASSERT().

+  If Buffer is not aligned on a UINTN boundary, then ASSERT().

+  If Length is not aligned on a UINTN boundary, then ASSERT().

+  If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().

+

+  @param  Buffer      Pointer to the target buffer to scan.

+  @param  Length      Number of bytes in Buffer to scan.

+  @param  Value       Value to search for in the target buffer.

+

+  @return A pointer to the matching byte in the target buffer or NULL otherwise.

+

+**/

+VOID *

+EFIAPI

+ScanMemN (

+  IN CONST VOID  *Buffer,

+  IN UINTN       Length,

+  IN UINTN       Value

+  )

+{

+  if (sizeof (UINTN) == sizeof (UINT64)) {

+    return ScanMem64 (Buffer, Length, (UINT64)Value);

+  }

+  return ScanMem32 (Buffer, Length, (UINT32)Value);

+}

+