Function bytesToHex [src]

Encodes a sequence of bytes as hexadecimal digits. Returns an array containing the encoded bytes.

Prototype

pub fn bytesToHex(input: anytype, case: Case) [input.len * 2]u8

Parameters

case: Case

Example

 test bytesToHex {
    const input = "input slice";
    const encoded = bytesToHex(input, .lower);
    var decoded: [input.len]u8 = undefined;
    try std.testing.expectEqualSlices(u8, input, try hexToBytes(&decoded, &encoded));
}

Source

  pub fn bytesToHex(input: anytype, case: Case) [input.len * 2]u8 {
    if (input.len == 0) return [_]u8{};
    comptime assert(@TypeOf(input[0]) == u8); // elements to encode must be unsigned bytes

    const charset = "0123456789" ++ if (case == .upper) "ABCDEF" else "abcdef";
    var result: [input.len * 2]u8 = undefined;
    for (input, 0..) |b, i| {
        result[i * 2 + 0] = charset[b >> 4];
        result[i * 2 + 1] = charset[b & 15];
    }
    return result;
}  