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#[derive(Debug)] #[repr(C)] pub struct MemoryMapTag { typ: u32, size: u32, entry_size: u32, entry_version: u32, first_area: MemoryArea, } impl MemoryMapTag { pub fn memory_areas(&self) -> MemoryAreaIter { let self_ptr = self as *const MemoryMapTag; let start_area = (&self.first_area) as *const MemoryArea; MemoryAreaIter { current_area: start_area as u64, last_area: (self_ptr as u64 + (self.size - self.entry_size) as u64), entry_size: self.entry_size, } } } #[derive(Debug)] #[repr(C)] pub struct MemoryArea { base_addr: u64, length: u64, typ: u32, _reserved: u32, } impl MemoryArea { pub fn start_address(&self) -> usize { self.base_addr as usize } pub fn end_address(&self) -> usize { (self.base_addr + self.length) as usize } pub fn size(&self) -> usize { self.length as usize } } #[derive(Clone, Debug)] pub struct MemoryAreaIter { current_area: u64, last_area: u64, entry_size: u32, } impl Iterator for MemoryAreaIter { type Item = &'static MemoryArea; fn next(&mut self) -> Option<&'static MemoryArea> { if self.current_area > self.last_area { None } else { let area = unsafe{&*(self.current_area as *const MemoryArea)}; self.current_area = self.current_area + (self.entry_size as u64); if area.typ == 1 { Some(area) } else {self.next()} } } }