fn init()

in sgx_rand/src/isaac.rs [319:375]

• 52 lines of code
• 5 McCabe index (conditional complexity)

    fn init(&mut self, use_rsl: bool) {
        macro_rules! init {
            ($var:ident) => (
                let mut $var = w(0x9e3779b97f4a7c13);
            )
        }
        init!(a); init!(b); init!(c); init!(d);
        init!(e); init!(f); init!(g); init!(h);

        macro_rules! mix {
            () => {{
                a=a-e; f=f^(h>>9);  h=h+a;
                b=b-f; g=g^(a<<9);  a=a+b;
                c=c-g; h=h^(b>>23); b=b+c;
                d=d-h; a=a^(c<<15); c=c+d;
                e=e-a; b=b^(d>>14); d=d+e;
                f=f-b; c=c^(e<<20); e=e+f;
                g=g-c; d=d^(f>>17); f=f+g;
                h=h-d; e=e^(g<<14); g=g+h;
            }}
        }

        for _ in 0..4 {
            mix!();
        }

        if use_rsl {
            macro_rules! memloop {
                ($arr:expr) => {{
                    for i in (0..RAND_SIZE_64 / 8).map(|i| i * 8) {
                        a=a+$arr[i  ]; b=b+$arr[i+1];
                        c=c+$arr[i+2]; d=d+$arr[i+3];
                        e=e+$arr[i+4]; f=f+$arr[i+5];
                        g=g+$arr[i+6]; h=h+$arr[i+7];
                        mix!();
                        self.mem[i  ]=a; self.mem[i+1]=b;
                        self.mem[i+2]=c; self.mem[i+3]=d;
                        self.mem[i+4]=e; self.mem[i+5]=f;
                        self.mem[i+6]=g; self.mem[i+7]=h;
                    }
                }}
            }

            memloop!(self.rsl);
            memloop!(self.mem);
        } else {
            for i in (0..RAND_SIZE_64 / 8).map(|i| i * 8) {
                mix!();
                self.mem[i  ]=a; self.mem[i+1]=b;
                self.mem[i+2]=c; self.mem[i+3]=d;
                self.mem[i+4]=e; self.mem[i+5]=f;
                self.mem[i+6]=g; self.mem[i+7]=h;
            }
        }

        self.isaac64();
    }