dharitri_sc/formatter/
hex_util.rs

1use alloc::string::String;
2
3fn half_byte_to_hex_digit(num: u8) -> u8 {
4    if num < 10 {
5        b'0' + num
6    } else {
7        b'a' + num - 0xau8
8    }
9}
10
11pub fn byte_to_hex_digits(byte: u8) -> [u8; 2] {
12    let digit1 = half_byte_to_hex_digit(byte >> 4);
13    let digit2 = half_byte_to_hex_digit(byte & 0x0f);
14    [digit1, digit2]
15}
16
17pub fn encode_bytes_as_hex(input: &[u8]) -> String {
18    let mut result = String::new();
19    for &byte in input {
20        let bytes = byte_to_hex_digits(byte);
21        result.push(bytes[0] as char);
22        result.push(bytes[1] as char);
23    }
24    result
25}
26
27fn hex_digit_to_half_byte(digit: u8) -> Option<u8> {
28    if digit.is_ascii_digit() {
29        return Some(digit - b'0');
30    }
31    if (b'a'..=b'f').contains(&digit) {
32        return Some(digit - b'a' + 0xau8);
33    }
34    None
35}
36
37pub fn hex_digits_to_byte(digit1: u8, digit2: u8) -> Option<u8> {
38    let mut result = match hex_digit_to_half_byte(digit1) {
39        None => {
40            return None;
41        },
42        Some(num) => num << 4,
43    };
44    match hex_digit_to_half_byte(digit2) {
45        None => {
46            return None;
47        },
48        Some(num) => {
49            result |= num;
50        },
51    };
52    Some(result)
53}
54
55pub fn byte_to_binary_digits(mut num: u8) -> [u8; 8] {
56    let mut result = [b'0'; 8];
57    let mut i = 7i32;
58    while i >= 0 {
59        result[i as usize] += num % 2;
60        num /= 2;
61        i -= 1;
62    }
63    result
64}
dharitri_sc/formatter/hex_util.rs

dharitri_sc/formatter/
hex_util.rs
