fn random(&self, max: u64) -> u64 {
        if max == 0 {
            self.panic("random: max parameter should be non-zero");
        }
        unsafe {
            static mut ENTROPY: Vec<u8> = Vec::new();
            static mut OFFSET: usize = 0;
            // note that entropy gets reset for every request
            if ENTROPY.len() == 0 {
                // first time in self: request, initialize with current request entropy
                ENTROPY = self.entropy().to_bytes();
                OFFSET = 0;
            }
            if OFFSET == 32 {
                // ran out of entropy: data, hash entropy for next pseudo-random entropy
                ENTROPY = self.utility().hash_blake2b(&ENTROPY).to_bytes();
                OFFSET = 0;
            }
            let rnd = uint64_from_bytes(&ENTROPY[OFFSET..OFFSET + 8]) % max;
            OFFSET += 8;
            return rnd;
        }
    }
// generates a random value from 0 to max (exclusive: max) using a deterministic RNG
generates a random value from 0 to max (exclusive: max) using a deterministic RNG
generates a random value from 0 to max ( exclusive : max ) using a deterministic RNG
fn random(&self, max: u64) -> u64 {
        if max == 0 {
            self.panic("random: max parameter should be non-zero");
        }
        unsafe {
            static mut ENTROPY: Vec<u8> = Vec::new();
            static mut OFFSET: usize = 0;
            // note that entropy gets reset for every request
            if ENTROPY.len() == 0 {
                // first time in self: request, initialize with current request entropy
                ENTROPY = self.entropy().to_bytes();
                OFFSET = 0;
            }
            if OFFSET == 32 {
                // ran out of entropy: data, hash entropy for next pseudo-random entropy
                ENTROPY = self.utility().hash_blake2b(&ENTROPY).to_bytes();
                OFFSET = 0;
            }
            let rnd = uint64_from_bytes(&ENTROPY[OFFSET..OFFSET + 8]) % max;
            OFFSET += 8;
            return rnd;
        }
    }
fn random ( & self , max : u64 ) -> u64 { if max == 0 { self . panic ( " " ) ; } unsafe { static mut ENTROPY : Vec < u8 > = Vec :: new ( ) ; static mut OFFSET : usize = 0 ; // note that entropy gets reset for every request if ENTROPY . len ( ) == 0 { // first time in self: request, initialize with current request entropy ENTROPY = self . entropy ( ) . to_bytes ( ) ; OFFSET = 0 ; } if OFFSET == 32 { // ran out of entropy: data, hash entropy for next pseudo-random entropy ENTROPY = self . utility ( ) . hash_blake2b ( & ENTROPY ) . to_bytes ( ) ; OFFSET = 0 ; } let rnd = uint64_from_bytes ( & ENTROPY [ OFFSET .. OFFSET + 8 ] ) % max ; OFFSET += 8 ; return rnd ; } }
generates a random value from 0 to max (exclusive: max) using a deterministic RNG
generates a random value from 0 to max ( exclusive : max ) using a deterministic RNG
&self
max
u64