Method parseIPv4_0

core/src/main/java/io/questdb/std/Numbers.java:1230–1288

(CharSequence sequence, final int p, int lim)

    }

    public static int parseIPv4_0(CharSequence sequence, final int p, int lim) throws NumericException {
        if (lim == 0) {
            throw NumericException.instance().put("empty IPv4 address string");
        }

        int hi;
        int lo = p;
        int num;
        int ipv4 = 0;
        int count = 0;

        final char sign = sequence.charAt(lo);

        // removes any leading dots
        if (notDigit(sign)) {
            if (sign == '.') {
                do {
                    lo++;
                } while (sequence.charAt(lo) == '.');
            } else {
                throw NumericException.instance().put("invalid IPv4 address: ").put(sequence);
            }
        }

        while ((hi = Chars.indexOf(sequence, lo, '.')) > -1 && count < 3) {
            num = parseInt(sequence, lo, hi);
            if (num > 255) {
                throw NumericException.instance().put("IPv4 octet out of range [0-255]: ").put(num);
            }
            ipv4 = (ipv4 << 8) | num;
            count++;
            lo = hi + 1;
        }

        if (count != 3) {
            throw NumericException.instance().put("IPv4 address must have 4 octets, found: ").put(count + 1);
        }

        // removes any trailing dots
        if ((hi = Chars.indexOf(sequence, lo, '.')) > -1) {
            num = parseInt(sequence, lo, hi);
            hi++;
            while (hi < lim) {
                if (sequence.charAt(hi) == '.') {
                    hi++;
                } else {
                    throw NumericException.instance().put("invalid character in IPv4 address: ").put(sequence);
                }
            }
        } else {
            num = parseInt(sequence, lo, lim);
        }

        if (num > 255) {
            throw NumericException.instance().put("IPv4 octet out of range [0-255]: ").put(num);
        }

        return (ipv4 << 8) | num;