Method parseInt0

core/src/main/java/io/questdb/std/Numbers.java:2888–2933

(CharSequence sequence, final int p, int lim)

    }

    private static int parseInt0(CharSequence sequence, final int p, int lim) throws NumericException {
        if (lim == p) {
            throw NumericException.instance().put("empty integer string");
        }

        final char sign = sequence.charAt(p);
        final boolean negative = sign == '-';
        int i = p;
        if (negative || sign == '+') {
            i++;
        }

        if (i >= lim) {
            throw NumericException.instance().put("empty integer string");
        }

        int digitCounter = 0;
        int val = 0;
        for (; i < lim; i++) {
            char c = sequence.charAt(i);
            if (c == '_') {
                if (digitCounter == 0) {
                    throw NumericException.instance().put("invalid integer format: ").put(sequence, p, lim);
                }
                digitCounter = 0;
            } else if (c < '0' || c > '9') {
                throw NumericException.instance().put("invalid character in integer: ").put(sequence, p, lim);
            } else {
                // val * 10 + (c - '0')
                if (val < (Integer.MIN_VALUE / 10)) {
                    throw NumericException.instance().put("integer overflow: ").put(sequence, p, lim);
                }
                int r = (val << 3) + (val << 1) - (c - '0');
                if (r > val) {
                    throw NumericException.instance().put("integer overflow: ").put(sequence, p, lim);
                }
                val = r;
                digitCounter++;
            }
        }

        if ((val == Integer.MIN_VALUE && !negative) || digitCounter == 0) {
            throw NumericException.instance().put("invalid integer format: ").put(sequence, p, lim);
        }
        return negative ? val : -val;
    }

    private static long parseLong0(CharSequence sequence, final int p, int lim) throws NumericException {
        if (lim == p) {