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use super::{Felt, StarkField};
use core::fmt::{self, Write};
use core::{
fmt::Debug,
ops::{Bound, Range},
};
use winter_utils::{collections::Vec, string::String};
pub use winter_utils::{
collections, group_slice_elements, group_vector_elements, string, uninit_vector, Box,
ByteReader, ByteWriter, Deserializable, DeserializationError, Serializable, SliceReader,
};
pub mod math {
pub use math::{batch_inversion, log2};
}
pub trait ToElements {
fn to_elements(&self) -> Vec<Felt>;
}
impl<const N: usize> ToElements for [u64; N] {
fn to_elements(&self) -> Vec<Felt> {
self.iter().map(|&v| Felt::new(v)).collect()
}
}
impl ToElements for Vec<u64> {
fn to_elements(&self) -> Vec<Felt> {
self.iter().map(|&v| Felt::new(v)).collect()
}
}
pub trait IntoBytes<const N: usize> {
fn into_bytes(self) -> [u8; N];
}
impl IntoBytes<32> for [Felt; 4] {
fn into_bytes(self) -> [u8; 32] {
let mut result = [0; 32];
result[..8].copy_from_slice(&self[0].as_int().to_le_bytes());
result[8..16].copy_from_slice(&self[1].as_int().to_le_bytes());
result[16..24].copy_from_slice(&self[2].as_int().to_le_bytes());
result[24..].copy_from_slice(&self[3].as_int().to_le_bytes());
result
}
}
pub trait PushMany<T> {
fn push_many(&mut self, value: T, n: usize);
}
impl<T: Copy> PushMany<T> for Vec<T> {
fn push_many(&mut self, value: T, n: usize) {
let new_len = self.len() + n;
self.resize(new_len, value);
}
}
pub const fn range(start: usize, len: usize) -> Range<usize> {
Range {
start,
end: start + len,
}
}
pub fn bound_into_included_u64<I>(bound: Bound<&I>, is_start: bool) -> u64
where
I: Clone + Into<u64>,
{
match bound {
Bound::Excluded(i) => i.clone().into().saturating_sub(1),
Bound::Included(i) => i.clone().into(),
Bound::Unbounded => {
if is_start {
0
} else {
u64::MAX
}
}
}
}
pub fn new_array_vec<T: Debug, const N: usize>(capacity: usize) -> [Vec<T>; N] {
(0..N)
.map(|_| Vec::with_capacity(capacity))
.collect::<Vec<_>>()
.try_into()
.expect("failed to convert vector to array")
}
#[test]
#[should_panic]
fn debug_assert_is_checked() {
debug_assert!(false);
}
pub fn to_hex(bytes: &[u8]) -> Result<String, fmt::Error> {
let mut s = String::with_capacity(bytes.len() * 2);
for byte in bytes {
write!(s, "{byte:02x}")?;
}
Ok(s)
}