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var cursor = text.GetEnumerator();
var ch = _FetchNextInput(cursor);
if (ch == -1) return -1!=entries[0];
var state = 0;
while (ch != -1)
{
    // state starts with accept symbol
    var acc = entries[state++];
    // next is the num of transitions
    var tlen = entries[state++];
    var m = false;
    for (var i = 0; i < tlen; ++i)
    {
        // each transition starts with the destination index
        var tto = entries[state++];
        // next with a packed range length
        var prlen = entries[state++];
        for (var j = 0; j < prlen; ++j)
        {
            // next each packed range
            var tmin = entries[state++];
            var tmax = entries[state++];
            if (ch >= tmin && ch <= tmax)
            {
                ch = _FetchNextInput(cursor);
                if (ch == -1) return -1!=entries[tto];
                state = tto;
                i = tlen;
                m = true;
                break;
            }
        }
    }
    if (!m) return -1!=acc;
}
return false;