/*
 *  call-seq:
 *     MultiTermQuery.new(field, options = {}) -> multi_term_query
 *
 *  Create a new MultiTermQuery on field +field+. You will also need to add
 *  terms to the query using the MultiTermQuery#add_term method.
 *
 *  There are several options available to you when creating a
 *  MultiTermQueries;
 *
 *  === Options
 *
 *  :max_terms:: You can specify the maximum number of terms that can be
 *               added to the query. This is to prevent memory usage overflow,
 *               particularly when don't directly control the addition of
 *               terms to the Query object like when you create Wildcard
 *               queries. For example, searching for "content:*" would cause
 *               problems without this limit.
 *  :min_score:: The minimum score a term must have to be added to the query.
 *               For example you could implement your own wild-card queries
 *               that gives matches a score. To limit the number of terms
 *               added to the query you could set a lower limit to this score.
 *               FuzzyQuery in particular makes use of this parameter.
 */
static VALUE
frt_mtq_init(int argc, VALUE *argv, VALUE self)
{
    VALUE rfield, roptions;
    float min_score = 0.0;
    int max_terms = FIX2INT(frt_mtq_get_dmt(self));
    Query *q;

    if (rb_scan_args(argc, argv, "11", &rfield, &roptions) == 2) {
        VALUE v;
        if (Qnil != (v = rb_hash_aref(roptions, sym_max_terms))) {
            max_terms = FIX2INT(v);
        }
        if (Qnil != (v = rb_hash_aref(roptions, sym_min_score))) {
            min_score = (float)NUM2DBL(v);
        }
    }
    q = multi_tq_new_conf(frt_field(rfield), max_terms, min_score);
    Frt_Wrap_Struct(self, NULL, &frt_q_free, q);
    object_add(q, self);
    return self;
}