ShellPkg: Fix Shell fail with redundant space following delay number.

When boot from Shell we can use '-delay [num]' as optional data. If blank space exist after '[num]' Shell will fail. This patch add error handling to avoid this failure.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Qiu Shumin <shumin.qiu@intel.com>
Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18431 6f19259b-4bc3-4df7-8a09-765794883524

ShellPkg/Application/Shell/Shell.h

@@ -360,5 +360,16 @@ FindFirstCharacter(
   IN CONST CHAR16 EscapeCharacter
   );
 
+/**
+  Cleans off leading and trailing spaces and tabs.
+
+  @param[in] String pointer to the string to trim them off.
+**/
+EFI_STATUS
+EFIAPI
+TrimSpaces(
+  IN CHAR16 **String
+  );
+
 #endif //_SHELL_INTERNAL_HEADER_
 

ShellPkg/Application/Shell/ShellParametersProtocol.c

@@ -359,6 +359,7 @@ CreatePopulateInstallShellParametersProtocol (
     //
     // Populate Argc and Argv
     //
+    TrimSpaces (&FullCommandLine);
     Status = ParseCommandLineToArgs(FullCommandLine,
                                     &(*NewShellParameters)->Argv,
                                     &(*NewShellParameters)->Argc);