ShellPkg: add API for determining operation type

There are no callers for this new API yet.  They will be added in the next commits.

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@14975 6f19259b-4bc3-4df7-8a09-765794883524

ShellPkg/Application/Shell/Shell.c

@@ -1527,6 +1527,67 @@ ShellSubstituteAliases(
   return (EFI_SUCCESS);
 }
 
+/**
+  Takes the Argv[0] part of the command line and determine the meaning of it.
+**/
+SHELL_OPERATION_TYPES
+EFIAPI
+GetOperationType(
+  IN CONST CHAR16 *CmdName
+  )
+{
+        CHAR16* FileWithPath;
+  CONST CHAR16* TempLocation;
+  CONST CHAR16* TempLocation2;
+
+  FileWithPath = NULL;
+  //
+  // test for an internal command.
+  //
+  if (ShellCommandIsCommandOnList(CmdName)) {
+    return (INTERNAL_COMMAND);
+  }
+
+  //
+  // Test for file system change request.  anything ending with : and cant have spaces.
+  //
+  if (CmdName[(StrLen(CmdName)-1)] == L':') {
+    if (StrStr(CmdName, L" ") != NULL) {
+      return (UNKNOWN_INVALID);
+    }
+    return (FILE_SYS_CHANGE);
+  }
+
+  //
+  // Test for a file
+  //
+  if ((FileWithPath = ShellFindFilePathEx(CmdName, mExecutableExtensions)) != NULL) {
+    //
+    // See if that file has a script file extension
+    //
+    if (StrLen(FileWithPath) > 4) {
+      TempLocation = FileWithPath+StrLen(FileWithPath)-4;
+      TempLocation2 = mScriptExtension;
+      if (StringNoCaseCompare((VOID*)(&TempLocation), (VOID*)(&TempLocation2)) == 0) {
+        SHELL_FREE_NON_NULL(FileWithPath);
+        return (SCRIPT_FILE_NAME);
+      }
+    }
+
+    //
+    // Was a file, but not a script.  we treat this as an application.
+    //
+    SHELL_FREE_NON_NULL(FileWithPath);
+    return (EFI_APPLICATION);
+  }
+  
+  SHELL_FREE_NON_NULL(FileWithPath);
+  //
+  // No clue what this is... return invalid flag...
+  //
+  return (UNKNOWN_INVALID);
+}
+
 /**
   Function will process and run a command line.
 

ShellPkg/Application/Shell/Shell.h

@@ -124,6 +124,14 @@ typedef struct {
 
 extern SHELL_INFO ShellInfoObject;
 
+typedef enum {
+  INTERNAL_COMMAND,
+  SCRIPT_FILE_NAME,
+  EFI_APPLICATION,
+  FILE_SYS_CHANGE,
+  UNKNOWN_INVALID
+} SHELL_OPERATION_TYPES;
+
 /**
   Sets all the alias' that were registered with the ShellCommandLib library.