fn read_number()

in sgx_tstd/src/net/parser.rs [124:154]

• 29 lines of code
• 8 McCabe index (conditional complexity)

    fn read_number<T: ReadNumberHelper>(
        &mut self,
        radix: u32,
        max_digits: Option<usize>,
        allow_zero_prefix: bool,
    ) -> Option<T> {
        self.read_atomically(move |p| {
            let mut result = T::ZERO;
            let mut digit_count = 0;
            let has_leading_zero = p.peek_char() == Some('0');

            while let Some(digit) = p.read_atomically(|p| p.read_char()?.to_digit(radix)) {
                result = result.checked_mul(radix)?;
                result = result.checked_add(digit)?;
                digit_count += 1;
                if let Some(max_digits) = max_digits {
                    if digit_count > max_digits {
                        return None;
                    }
                }
            }

            if digit_count == 0 {
                None
            } else if !allow_zero_prefix && has_leading_zero && digit_count > 1 {
                None
            } else {
                Some(result)
            }
        })
    }