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Ditch the chars() iterator

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Marcel 2023-01-13 12:12:57 +01:00
parent 0569cfc771
commit 563e0cbd9b
1 changed files with 5 additions and 4 deletions
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9
matter/src/codec/base38.rs
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@ -17,7 +17,10 @@
//! Base38 encoding functions. //! Base38 encoding functions.
const BASE38_CHARS: &str = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-."; const BASE38_CHARS: [char; 38] = [
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I',
'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '-', '.',
];
/// Encodes a byte array into a base38 string. /// Encodes a byte array into a base38 string.
pub fn encode(bytes: &[u8], length: usize) -> String { pub fn encode(bytes: &[u8], length: usize) -> String {
@ -55,11 +58,9 @@ pub fn encode(bytes: &[u8], length: usize) -> String {
fn encode_base38(mut value: u32, char_count: u8) -> String { fn encode_base38(mut value: u32, char_count: u8) -> String {
let mut result = String::new(); let mut result = String::new();
let chars = BASE38_CHARS.chars();
for _ in 0..char_count { for _ in 0..char_count {
let mut use_chars = chars.clone();
let remainder = value % 38; let remainder = value % 38;
result.push(use_chars.nth(remainder as usize).unwrap()); result.push(BASE38_CHARS[remainder as usize]);
value = (value - remainder) / 38; value = (value - remainder) / 38;
} }
result result