What is the D way to map a binary file to a structure?

[cym13 via Digitalmars-d-learn]

Hi,

Let's say I have a simple binary file whose structure is 
well-known. Here is
an example which stores points:
struct Point {
    long x;
    long y;
    long z;
}

struct BinFile {
    uint    magicNumber;  // Some identifier
    ulong   pointsNumber;
    Point[] points;       // Array of pointsNumber points.
}

What is the best way to read some file and fill a structure with 
it? Would
reading the file into a void[] and then casting it to the struct 
work with
things like internal struct padding?