Comment's added and fixed.

[mirror_edk2.git] / ShellPkg / Include / ShellBase.h

diff --git a/ShellPkg/Include/ShellBase.h b/ShellPkg/Include/ShellBase.h
index 3aee67442f99c2862715b7fa7424082f19ea9490..73ef064207814028880c112ea4ad689f614cc1e0 100644 (file)
--- a/ShellPkg/Include/ShellBase.h
+++ b/ShellPkg/Include/ShellBase.h
@@ -1,7 +1,7 @@
 /** @file\r
   Root include file for Shell Package modules that utilize the SHELL_RETURN type\r
 \r
-  Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>\r
+  Copyright (c) 2009 - 2011, 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
@@ -12,9 +12,23 @@
 \r
 **/\r
 \r
-#if !defined(__SHELL_BASE__)\r
+#ifndef __SHELL_BASE__\r
 #define __SHELL_BASE__\r
 \r
+#define ABS(a) ((a<0)?(-(a)):(a))\r
+\r
+typedef VOID *SHELL_FILE_HANDLE;\r
+\r
+#ifndef SHELL_FREE_NON_NULL\r
+#define SHELL_FREE_NON_NULL(Pointer)  \\r
+  do {                                \\r
+    if ((Pointer) != NULL) {          \\r
+      FreePool((Pointer));            \\r
+      (Pointer) = NULL;               \\r
+    }                                 \\r
+  } while(FALSE)\r
+#endif //SHELL_FREE_NON_NULL\r
+\r
 typedef enum {\r
 ///\r
 /// The operation completed successfully.\r
@@ -60,7 +74,7 @@ SHELL_NOT_READY             = 6,
 SHELL_DEVICE_ERROR          = 7,\r
 \r
 ///\r
-/// The device can not be written to.\r
+/// The device cannot be written to.\r
 ///\r
 SHELL_WRITE_PROTECTED       = 8,\r
 \r