ShellPkg: Fixes and updates for the 'drivers' command

- Update 'drivers -sfo' format to match UEFI Shell 2.1 spec
- Update help output for easier viewing
- Update 'drivers' output format for better alignment
             T   D
             Y C I
             P F A
DRV VERSION  E G G #D  #C  DRIVER NAME                         IMAGE PATH
=== ======== = = = === === =================================== ==========

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chris Phillips <chrisp@hp.com>
Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15870 6f19259b-4bc3-4df7-8a09-765794883524

ShellPkg/Library/UefiShellDriver1CommandsLib/Drivers.c

@@ -1,6 +1,7 @@
 /** @file
   Main file for Drivers shell Driver1 function.
 
+  (C) Copyright 2012-2014, Hewlett-Packard Development Company, L.P.
   Copyright (c) 2010 - 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
@@ -14,6 +15,8 @@
 
 #include "UefiShellDriver1CommandsLib.h"
 
+#define MAX_LEN_DRIVER_NAME 35
+
 STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
   {L"-sfo", TypeFlag},
   {L"-l", TypeValue},
@@ -185,15 +188,19 @@ ShellCommandRunDrivers (
   UINTN               ChildCount;
   UINTN               DeviceCount;
   CHAR16              *Temp2;
+  CONST CHAR16        *FullDriverName;
+  CHAR16              *TruncatedDriverName;
   CHAR16              *FormatString;
   UINT32              DriverVersion;
   BOOLEAN             DriverConfig;
   BOOLEAN             DriverDiag;
+  BOOLEAN             SfoFlag;
 
   ShellStatus         = SHELL_SUCCESS;
   Status              = EFI_SUCCESS;
   Language            = NULL;
   FormatString        = NULL;
+  SfoFlag             = FALSE;
 
   //
   // initialize the shell lib (we must be in non-auto-init...)
@@ -235,7 +242,18 @@ ShellCommandRunDrivers (
       }
 
       if (ShellCommandLineGetFlag (Package, L"-sfo")) {
+        SfoFlag = TRUE;
         FormatString = HiiGetString (gShellDriver1HiiHandle, STRING_TOKEN (STR_DRIVERS_ITEM_LINE_SFO), Language);
+        //
+        // print the SFO header
+        //
+        ShellPrintHiiEx (
+          -1,
+          -1,
+          Language,
+          STRING_TOKEN (STR_GEN_SFO_HEADER),
+          gShellDriver1HiiHandle,
+          L"drivers");
       } else {
         FormatString = HiiGetString (gShellDriver1HiiHandle, STRING_TOKEN (STR_DRIVERS_ITEM_LINE), Language);
         //
@@ -259,7 +277,13 @@ ShellCommandRunDrivers (
         DriverVersion  = ReturnDriverVersion(*HandleWalker);
         DriverConfig   = ReturnDriverConfig(*HandleWalker);
         DriverDiag     = ReturnDriverDiag  (*HandleWalker);
-        Lang          = GetStringNameFromHandle(*HandleWalker, Language);
+        FullDriverName = GetStringNameFromHandle(*HandleWalker, Language);
+
+        TruncatedDriverName = NULL;
+        if (!SfoFlag && (FullDriverName != NULL)) {
+          TruncatedDriverName = AllocateZeroPool ((MAX_LEN_DRIVER_NAME + 1) * sizeof (CHAR16));
+          StrnCpy (TruncatedDriverName, FullDriverName, MAX_LEN_DRIVER_NAME);
+        }
 
         ShellPrintEx(
           -1,
@@ -272,9 +296,12 @@ ShellCommandRunDrivers (
           DriverDiag?L'Y':L'N',
           DeviceCount,
           ChildCount,
-          Lang,
+          SfoFlag?FullDriverName:TruncatedDriverName,
           Temp2==NULL?L"":Temp2
          );
+        if (TruncatedDriverName != NULL) {
+          FreePool (TruncatedDriverName);
+        }
         if (Temp2 != NULL) {
           FreePool(Temp2);
         }