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mod algorithms;
extern crate sputnikvm_rlp as rlp;
mod m256;
mod mi256;
mod u256;
mod u512;
pub use self::m256::M256;
pub use self::u256::U256;
pub use self::mi256::MI256;
pub use self::u512::U512;
#[derive(Eq, PartialEq, Debug, Copy, Clone, Hash)]
pub enum Sign {
Minus,
NoSign,
Plus,
}
#[derive(Debug)]
pub enum ParseHexError {
InvalidCharacter,
TooLong,
TooShort,
Other
}
pub fn read_hex(s: &str) -> Result<Vec<u8>, ParseHexError> {
if s.starts_with("0x") {
return read_hex(&s[2..s.len()]);
}
if s.len() & 1 == 1 {
let mut new_s = "0".to_string();
new_s.push_str(s);
return read_hex(&new_s);
}
let mut res = Vec::<u8>::new();
let mut cur = 0;
let mut len = 0;
for c in s.chars() {
len += 1;
let v_option = c.to_digit(16);
if v_option.is_none() {
return Err(ParseHexError::InvalidCharacter);
}
let v = v_option.unwrap();
if len == 1 {
cur += v * 16;
} else {
cur += v;
}
if len == 2 {
res.push(cur as u8);
cur = 0;
len = 0;
}
}
return Ok(res);
}