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biguint api #19

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Merged
hero78119 merged 1 commit into from
Dec 1, 2025
Merged

biguint api #19

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26 changes: 9 additions & 17 deletions crates/curves/src/utils.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -48,29 +48,21 @@ cfg_if::cfg_if! {
}

#[inline]
pub fn biguint_from_words(words: &[u32]) -> BigUint {
let mut bytes = Vec::with_capacity(words.len() * 4);
for word in words {
pub fn biguint_from_be_words(be_words: &[u32]) -> BigUint {
let mut bytes = Vec::with_capacity(be_words.len() * 4);
for word in be_words {
bytes.extend_from_slice(&word.to_le_bytes());
}
BigUint::from_bytes_le(&bytes)
BigUint::from_bytes_be(&bytes)
}

#[inline]
pub fn biguint_to_words(integer: &BigUint, num_words: usize) -> Vec<u32> {
let mut bytes = integer.to_bytes_le();
bytes.resize(num_words * 4, 0u8);
let mut words = Vec::with_capacity(num_words);
for i in 0..num_words {
let word = u32::from_le_bytes([
bytes[4 * i],
bytes[4 * i + 1],
bytes[4 * i + 2],
bytes[4 * i + 3],
]);
words.push(word);
pub fn biguint_from_le_words(le_words: &[u32]) -> BigUint {
let mut bytes = Vec::with_capacity(le_words.len() * 4);
for word in le_words {
bytes.extend_from_slice(&word.to_le_bytes());
}
words
BigUint::from_bytes_le(&bytes)
}

#[inline]
Expand Down