Encode UEFI's peculiar string handling in the type system #61
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UEFI string handling is interesting. Some parts of the spec use Latin-1, others use UCS-2, and overall everyone uses null terminators. Since all of this is quite alien to the idiomatic Rust developer, I thought it could be worthwhile to encode the various constraints that are involved in the type system.
I also took the opportunity to fix a few safety bugs (safe functions taking pointers as input).