43 lines
1023 B
Rust
43 lines
1023 B
Rust
fn cusip_check(cusip: &str) -> bool {
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if cusip.len() != 9 {
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return false;
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}
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let mut v = 0;
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let capital_cusip = cusip.to_uppercase();
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let char_indices = capital_cusip.as_str().char_indices().take(7);
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let total = char_indices.fold(0, |total, (i, c)| {
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v = match c {
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'*' => 36,
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'@' => 37,
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'#' => 38,
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_ if c.is_digit(10) => c.to_digit(10).unwrap() as u8,
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_ if c.is_alphabetic() => (c as u8) - b'A' + 1 + 9,
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_ => v,
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};
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if i % 2 != 0 {
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v *= 2
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}
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total + (v / 10) + v % 10
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});
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let check = (10 - (total % 10)) % 10;
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(check.to_string().chars().nth(0).unwrap()) == cusip.chars().nth(cusip.len() - 1).unwrap()
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}
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fn main() {
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let codes = [
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"037833100",
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"17275R102",
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"38259P508",
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"594918104",
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"68389X106",
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"68389X105",
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];
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for code in &codes {
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println!("{} -> {}", code, cusip_check(code))
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}
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}
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