Software license for sharing?

[Ryan-rsm-McKenzie]

Hi, I'm working on some software that needs to convert between dds <-> gnf textures, and this repository has been monumental in helping me develop a functional pipeline for doing such. However I see that this software does not contain a license dictating its terms of use, so I am wondering if it is ok for me to copy code from this repository for use in my own library. Specifically I need to use the PS4 texture swizzling and the GNF texture definitions. For reference, I am writing support for a PS4 only variant of Fallout 4 archive files available here.