INNER CODE UNIT · Rust

h2

RustCrypto/stream-ciphers · hc-256/src/lib.rs:156

    fn h2(&self, x: u32) -> u32 {
        self.ptable[(x & 0xff) as usize]
            .wrapping_add(self.ptable[(256 + ((x >> 8) & 0xff)) as usize])
            .wrapping_add(self.ptable[(512 + ((x >> 16) & 0xff)) as usize])
            .wrapping_add(self.ptable[(768 + ((x >> 24) & 0xff)) as usize])
    }

    fn gen_word(&mut self) -> u32 {
        let i = self.idx as usize;
        let j = self.idx as usize & TABLE_MASK;

        self.idx = (self.idx + 1) & (2048 - 1);

        if i < 1024 {
            self.ptable[j] = self.ptable[j]
                .wrapping_add(self.ptable[j.wrapping_sub(10) & TABLE_MASK])
                .wrapping_add(self.g1(
                    self.ptable[j.wrapping_sub(3) & TABLE_MASK],

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