From 19a4497259a24d0b9838c7e79c9ec4f5baf9828e Mon Sep 17 00:00:00 2001
From: Jaben Carsey <jaben.carsey@intel.com>
Date: Tue, 10 Dec 2013 18:41:35 +0000
Subject: [PATCH] ShellPkg: Refactor Pipe handling
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This moves some logic for handling command lines with pipe ‘|’ into a separate function.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jaben Carsey <jaben.carsey@intel.com>
Reviewed-by: Erik Bjorge <erik.c.bjorge@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14958 6f19259b-4bc3-4df7-8a09-765794883524
---
 ShellPkg/Application/Shell/Shell.c | 41 +++++++++++++++++++++---------
 1 file changed, 29 insertions(+), 12 deletions(-)

diff --git a/ShellPkg/Application/Shell/Shell.c b/ShellPkg/Application/Shell/Shell.c
index 84b74ea1d2..369789a3d7 100644
--- a/ShellPkg/Application/Shell/Shell.c
+++ b/ShellPkg/Application/Shell/Shell.c
@@ -70,6 +70,34 @@ STATIC CONST CHAR16 mScriptExtension[]      = L".NSH";
 STATIC CONST CHAR16 mExecutableExtensions[] = L".NSH;.EFI";
 STATIC CONST CHAR16 mStartupScript[]        = L"startup.nsh";
 
+/**
+  Determine if a command line contains a valid split operation
+
+  @param[in] CmdLine      The command line to parse.
+
+  @retval TRUE            CmdLine has a valid split.
+  @retval FALSE           CmdLine does not have a valid split.
+**/
+BOOLEAN
+EFIAPI
+ContainsSplit(
+  IN CONST CHAR16 *CmdLine
+  )
+{
+  CONST CHAR16 *TempSpot;
+  TempSpot = NULL;
+  if (StrStr(CmdLine, L"|") != NULL) {
+    for (TempSpot = CmdLine ; TempSpot != NULL && *TempSpot != CHAR_NULL ; TempSpot++) {
+      if (*TempSpot == L'^' && *(TempSpot+1) == L'|') {
+        TempSpot++;
+      } else if (*TempSpot == L'|') {
+        break;
+      }
+    }
+  }
+  return (TempSpot != NULL && *TempSpot != CHAR_NULL);
+}
+
 /**
   Function to start monitoring for CTRL-S using SimpleTextInputEx.  This 
   feature's enabled state was not known when the shell initially launched.
@@ -1389,7 +1417,6 @@ RunCommand(
   SHELL_FILE_HANDLE         OriginalStdOut;
   SHELL_FILE_HANDLE         OriginalStdErr;
   SYSTEM_TABLE_INFO         OriginalSystemTableInfo;
-  CHAR16                    *TempLocation3;
   UINTN                     Count;
   UINTN                     Count2;
   CHAR16                    *CleanOriginal;
@@ -1494,17 +1521,7 @@ RunCommand(
   //
   // We dont do normal processing with a split command line (output from one command input to another)
   //
-  TempLocation3 = NULL;
-  if (StrStr(PostVariableCmdLine, L"|") != NULL) {
-    for (TempLocation3 = PostVariableCmdLine ; TempLocation3 != NULL && *TempLocation3 != CHAR_NULL ; TempLocation3++) {
-      if (*TempLocation3 == L'^' && *(TempLocation3+1) == L'|') {
-        TempLocation3++;
-      } else if (*TempLocation3 == L'|') {
-        break;
-      }
-    }
-  }
-  if (TempLocation3 != NULL && *TempLocation3 != CHAR_NULL) {
+  if (ContainsSplit(PostVariableCmdLine)) {
     //
     // are we in an existing split???
     //