rust-sike 0.2.1

//! Utils for conversions

use crate::ff::{
    PrimeFieldP434, PrimeFieldP503, PrimeFieldP610, PrimeFieldP751, QuadraticExtension,
};

/// String to `u64` conversion
pub fn str_to_u64(s: &str) -> Result<u64, String> {
    u64::from_str_radix(s, 16).or_else(|_| Err(String::from("Cannot parse from string")))
}

/// String to an element of the quadratic extension field conversion
pub fn str_to_p434(s0: &str, s1: &str) -> Result<QuadraticExtension<PrimeFieldP434>, String> {
    Ok(QuadraticExtension::from(
        PrimeFieldP434::from_string(s0)?,
        PrimeFieldP434::from_string(s1)?,
    ))
}

/// String to an element of the quadratic extension field conversion
pub fn str_to_p503(s0: &str, s1: &str) -> Result<QuadraticExtension<PrimeFieldP503>, String> {
    Ok(QuadraticExtension::from(
        PrimeFieldP503::from_string(s0)?,
        PrimeFieldP503::from_string(s1)?,
    ))
}

/// String to an element of the quadratic extension field conversion
pub fn str_to_p751(s0: &str, s1: &str) -> Result<QuadraticExtension<PrimeFieldP751>, String> {
    Ok(QuadraticExtension::from(
        PrimeFieldP751::from_string(s0)?,
        PrimeFieldP751::from_string(s1)?,
    ))
}

/// String to an element of the quadratic extension field conversion
pub fn str_to_p610(s0: &str, s1: &str) -> Result<QuadraticExtension<PrimeFieldP610>, String> {
    Ok(QuadraticExtension::from(
        PrimeFieldP610::from_string(s0)?,
        PrimeFieldP610::from_string(s1)?,
    ))
}

/// Concatenates a list of arrays into one array
// Example
// ```
// let a = [1, 2];
// let b = [3, 4];
// let a_and_b = conversion::concatenate(&[&a, &b]);
// assert_eq!(a_and_b, [1, 2, 3, 4]);
// ```
pub fn concatenate(arrays: &[&[u8]]) -> Vec<u8> {
    let mut result = vec![];
    for &array in arrays {
        result.extend(array);
    }
    result
}