updated comments and added string-to-number conversion with return value to indicate success or failure. All parameter checking updated to non-case-sensitive.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11424 6f19259b-4bc3-4df7-8a09-765794883524

ShellPkg/Library/UefiShellLib/UefiShellLib.h

@@ -1,7 +1,7 @@
 /** @file
   Provides interface to shell functionality for shell commands and applications.
 
-  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2006 - 2011, 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
@@ -12,6 +12,9 @@
 
 **/
 
+#if !defined (_UEFI_SHELL_LIB_INTERNAL_H_)
+#define _UEFI_SHELL_LIB_INTERNAL_H_
+
 #include <Uefi.h>
 
 #include <Guid/FileInfo.h>
@@ -48,3 +51,26 @@ typedef struct  {
   EFI_SHELL_FLUSH_FILE                      FlushFile;
   EFI_SHELL_GET_FILE_SIZE                   GetFileSize;
 } FILE_HANDLE_FUNCTION_MAP;
+
+/**
+  Function to determin if an entire string is a valid number.
+
+  If Hex it must be preceeded with a 0x or has ForceHex, set TRUE.
+
+  @param[in] String       The string to evaluate.
+  @param[in] ForceHex     TRUE - always assume hex.
+  @param[in] StopAtSpace  TRUE to halt upon finding a space, FALSE to keep going.
+
+  @retval TRUE        It is all numeric (dec/hex) characters.
+  @retval FALSE       There is a non-numeric character.
+**/
+BOOLEAN
+EFIAPI
+InternalShellIsHexOrDecimalNumber (
+  IN CONST CHAR16   *String,
+  IN CONST BOOLEAN  ForceHex,
+  IN CONST BOOLEAN  StopAtSpace
+  );
+
+#endif
+