#[cfg(not(feature = "fuzztarget"))]
mod real_rng {
use rand::{thread_rng,Rng};
- use bitcoin::util::uint::Uint256;
pub fn fill_bytes(data: &mut [u8]) {
let mut rng = thread_rng();
rng.fill_bytes(data);
}
- pub fn rand_uint256() -> Uint256 {
- let mut rng = thread_rng();
- Uint256([rng.gen(), rng.gen(), rng.gen(), rng.gen()])
- }
-
pub fn rand_f32() -> f32 {
let mut rng = thread_rng();
rng.next_f32()
#[cfg(feature = "fuzztarget")]
mod fuzzy_rng {
- use bitcoin::util::uint::Uint256;
+ use util::byte_utils;
+
+ static mut RNG_ITER: u64 = 0;
pub fn fill_bytes(data: &mut [u8]) {
- for i in 0..data.len() {
- data[i] = 0x42;
+ let rng = unsafe { RNG_ITER += 1; RNG_ITER -1 };
+ for i in 0..data.len() / 8 {
+ data[i*8..(i+1)*8].copy_from_slice(&byte_utils::be64_to_array(rng));
}
+ let rem = data.len() % 8;
+ let off = data.len() - rem;
+ data[off..].copy_from_slice(&byte_utils::be64_to_array(rng)[0..rem]);
}
- pub fn rand_uint256() -> Uint256 {
- Uint256([0xdeadbeef, 0x1badcafe, 0xbadbeef, 0xdeadcafe])
+ pub fn rand_f32() -> f32 {
+ let rng = unsafe { RNG_ITER += 1; RNG_ITER - 1 };
+ f64::from_bits(rng) as f32
}
- pub fn rand_f32() -> f32 {
- 0.42
+ pub fn reset_rng_state() {
+ unsafe { RNG_ITER = 0; }
}
}
#[cfg(feature = "fuzztarget")]