mirror of https://github.com/dswd/zvault
32 lines
865 B
Rust
32 lines
865 B
Rust
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pub fn to_hex(data: &[u8]) -> String {
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data.iter().map(|b| format!("{:02x}", b)).collect::<Vec<String>>().join("")
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}
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pub fn parse_hex(hex: &str) -> Result<Vec<u8>, ()> {
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let mut b = Vec::with_capacity(hex.len() / 2);
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let mut modulus = 0;
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let mut buf = 0;
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for (_, byte) in hex.bytes().enumerate() {
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buf <<= 4;
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match byte {
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b'A'...b'F' => buf |= byte - b'A' + 10,
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b'a'...b'f' => buf |= byte - b'a' + 10,
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b'0'...b'9' => buf |= byte - b'0',
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b' '|b'\r'|b'\n'|b'\t' => {
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buf >>= 4;
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continue
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}
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_ => return Err(()),
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}
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modulus += 1;
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if modulus == 2 {
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modulus = 0;
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b.push(buf);
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}
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}
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match modulus {
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0 => Ok(b.into_iter().collect()),
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_ => Err(()),
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}
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}
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