Method parseLong0

core/src/main/java/io/questdb/std/Numbers.java:2935–2985

(CharSequence sequence, final int p, int lim)

    }

    private static long parseLong0(CharSequence sequence, final int p, int lim) throws NumericException {
        if (lim == p) {
            throw NumericException.instance().put("empty long string");
        }

        boolean negative = sequence.charAt(p) == '-';

        int i = p;
        if (negative) {
            i++;
        }

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

        int digitCounter = 0;
        long val = 0;
        for (; i < lim; i++) {
            int c = sequence.charAt(i);
            switch (c | 32) {
                case 'l':
                    if (i == 0 || i + 1 < lim) {
                        throw NumericException.instance().put("invalid long format: ").put(sequence, p, lim);
                    }
                    break;
                case 127: // '_'
                    if (digitCounter == 0) {
                        throw NumericException.instance().put("invalid long format: ").put(sequence, p, lim);
                    }
                    digitCounter = 0;
                    break;
                default:
                    if (c < '0' || c > '9') {
                        throw NumericException.instance().put("invalid character in long: ").put(sequence, p, lim);
                    }
                    // val * 10 + (c - '0')
                    long r = (val << 3) + (val << 1) - (c - '0');
                    if (r > val) {
                        throw NumericException.instance().put("long overflow: ").put(sequence, p, lim);
                    }
                    val = r;
                    digitCounter++;
            }
        }

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

    private static short parseShort0(CharSequence sequence, final int p, int lim) throws NumericException {
        if (lim == p) {