OcDevicePathLib: Add support for short-form expansion

Include/Library/OcDevicePathLib.h

@@ -151,4 +151,23 @@ OcFixAppleBootDevicePath (
   IN OUT EFI_DEVICE_PATH_PROTOCOL  **DevicePath
   );
 
+/**
+  Get the next possible full path pointing to the load option.
+  The routine doesn't guarantee the returned full path points to an existing
+  file, and it also doesn't guarantee the existing file is a valid load option.
+
+  @param FilePath  The device path pointing to a load option.
+                   It could be a short-form device path.
+  @param FullPath  The full path returned by the routine in last call.
+                   Set to NULL in first call.
+
+  @return The next possible full path pointing to the load option.
+          Caller is responsible to free the memory.
+**/
+EFI_DEVICE_PATH_PROTOCOL *
+OcGetNextLoadOptionDevicePath (
+  IN EFI_DEVICE_PATH_PROTOCOL  *FilePath,
+  IN EFI_DEVICE_PATH_PROTOCOL  *FullPath
+  );
+
 #endif // OC_DEVICE_PATH_LIB_H

Library/OcDevicePathLib/OcDevicePathLib.c

@@ -267,7 +267,10 @@ OcFixAppleBootDevicePath (
   ASSERT (DevicePath != NULL);
   ASSERT (*DevicePath != NULL);
   ASSERT (IsDevicePathValid (*DevicePath, 0));
-
+  //
+  // CAUTION: When adding new fixes, ensure short-form device paths are not
+  //          modified and success is returned.
+  //
   OriginalDevPath = *DevicePath;
 
   while (TRUE) {

Library/OcDevicePathLib/OcDevicePathLib.inf

@@ -32,6 +32,7 @@
 
 [Sources]
   OcDevicePathLib.c
+  ExpandDevicePath.c
 
 [Packages]
   OcSupportPkg/OcSupportPkg.dec
@@ -42,3 +43,6 @@
 [Protocols]
   gEfiDevicePathToTextProtocolGuid
   gEfiSimpleFileSystemProtocolGuid
+  gEfiBlockIoProtocolGuid
+  gEfiUsbIoProtocolGuid
+  gEfiLoadFileProtocolGuid