Function DTDeleteProperty

Library/DeviceTreeLib/DeviceTreeLib.c:578–628

///

UINT32
DTDeleteProperty (
  IN CHAR8              *NodeName,
  IN CHAR8              *DeletePropertyName
  )
{
  DTEntry             Node;
  DTPropertyIterator  PropIter;
  DTProperty          *Property;
  CHAR8               *DeletePosition;
  CHAR8               *DeviceTreeEnd;
  UINT32              DeleteLength;

  PropIter       = &mOpaquePropIter;
  DeletePosition = NULL;
  DeviceTreeEnd  = (CHAR8 *) mDTRootNode + *mDTLength;
  DeleteLength   = 0;

  if (!EFI_ERROR(DTLookupEntry (NULL, NodeName, &Node))) {
    if (!EFI_ERROR(DTCreatePropertyIterator (Node, PropIter))) {
      while (!EFI_ERROR(DTIterateProperties (PropIter, &DeletePosition))) {
        if (AsciiStrStr (DeletePosition, DeletePropertyName) != NULL) {
          Property     = (DTProperty *)DeletePosition;
          DeleteLength = sizeof (DTProperty) + ALIGN_VALUE (Property->Length, sizeof (UINT32));

          //
          // Adjust Device Tree Length.
          //
          if (mDTLength != NULL) {
            *mDTLength -= DeleteLength;
          }

          //
          // Delete Property.
          //
          CopyMem(DeletePosition, DeletePosition + DeleteLength, DeviceTreeEnd - DeletePosition);
          ZeroMem (DeviceTreeEnd - DeleteLength, DeleteLength);

          //
          // Decrement Nodes Properties Count.
          //
          Node->NumProperties--;

          break;
        }
      }
    }
  }

  return DeleteLength;
}

// DTInsertProperty
///