C data types for FFI

 FFI::C provide tools for building classes to interface for
 common C data types. Arrays, struct, union and nested types based on those
 are supported.
 .
 Core FFI::Platypus also provides FFI::Platypus::Record for manipulating
 and passing structured data. Typically you want to use FFI::C instead,
 the main exception is when you need to pass structured data by value
 instead of by reference.
 .
 To work with C APIs that work with C file pointers you can use FFI::C::File
 and FFI::C::PosixFile. For C APIs that expose the POSIX stat structure
 use FFI::C::Stat.