DynamicTablesPkg: Add AsciiFromHex helper function

AsciiFromHex is a function converts a hex number to an
ASCII character. This function is used across multiple
generators, so add it to the TableHelperLib.

Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
Reviewed-by: Alexei Fedorov <Alexei.Fedorov@arm.com>

1 files changed, 28 insertions, 2 deletions

diff --git a/DynamicTablesPkg/Library/Common/TableHelperLib/TableHelper.c b/DynamicTablesPkg/Library/Common/TableHelperLib/TableHelper.c
index fc6cf3b..0d9daad 100644
--- a/DynamicTablesPkg/Library/Common/TableHelperLib/TableHelper.c
+++ b/DynamicTablesPkg/Library/Common/TableHelperLib/TableHelper.c
@@ -1,8 +1,9 @@
 /** @file

   Table Helper

 

-Copyright (c) 2017 - 2019, ARM Limited. All rights reserved.

-SPDX-License-Identifier: BSD-2-Clause-Patent

+  Copyright (c) 2017 - 2020, Arm Limited. All rights reserved.<BR>

+

+  SPDX-License-Identifier: BSD-2-Clause-Patent

 **/

 

 #include <Protocol/AcpiTable.h>

@@ -244,3 +245,28 @@ FindDuplicateValue (
   }

   return FALSE;

 }

+

+/** Convert a hex number to its ASCII code.

+

+ @param [in]  x   Hex number to convert.

+                  Must be 0 <= x < 16.

+

+ @return The ASCII code corresponding to x.

+**/

+UINT8

+EFIAPI

+AsciiFromHex (

+  IN  UINT8   x

+  )

+{

+  if (x < 10) {

+    return (UINT8)(x + '0');

+  }

+

+  if (x < 16) {

+    return (UINT8)(x - 10 + 'A');

+  }

+

+  ASSERT (FALSE);

+  return (UINT8)0;

+}