zfi 0.2.0

Zero-cost and safe interface to UEFI firmware
Documentation 
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use crate::{get_protocol, system_table, Guid, Path, SimpleFileSystem, Status};

/// Represents an `EFI_HANDLE` for a device.
pub struct Device(());

impl Device {
    pub fn locate<'a>(proto: &Guid, path: &'a Path) -> Result<(&'static Self, &'a Path), Status> {
        system_table()
            .boot_services()
            .locate_device_path(proto, path)
    }

    pub fn path(&self) -> Option<&Path> {
        static ID: Guid = Guid::new(
            0x09576e91,
            0x6d3f,
            0x11d2,
            [0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b],
        );

        unsafe {
            get_protocol(self as *const Device as *const (), &ID).map(|v| Path::from_ptr(v as _))
        }
    }

    pub fn file_system(&self) -> Option<&SimpleFileSystem> {
        unsafe {
            get_protocol(self as *const Device as *const (), &SimpleFileSystem::ID)
                .map(|v| &*(v as *const SimpleFileSystem))
        }
    }
}