/*
 * call-seq: new(opts = {})
 *
 * Instantiates a new State object, configured by _opts_.
 *
 * _opts_ can have the following keys:
 *
 * * *indent*: a string used to indent levels (default: ''),
 * * *space*: a string that is put after, a : or , delimiter (default: ''),
 * * *space_before*: a string that is put before a : pair delimiter (default: ''),
 * * *object_nl*: a string that is put at the end of a JSON object (default: ''), 
 * * *array_nl*: a string that is put at the end of a JSON array (default: ''),
 * * *check_circular*: true if checking for circular data structures
 *   should be done, false (the default) otherwise.
 * * *allow_nan*: true if NaN, Infinity, and -Infinity should be
 *   generated, otherwise an exception is thrown, if these values are
 *   encountered. This options defaults to false.
 */
static VALUE cState_initialize(int argc, VALUE *argv, VALUE self)
{
    VALUE opts;
    GET_STATE(self);

    rb_scan_args(argc, argv, "01", &opts);
    state->indent = rb_str_new2("");
    state->space = rb_str_new2("");
    state->space_before = rb_str_new2("");
    state->array_nl = rb_str_new2("");
    state->object_nl = rb_str_new2("");
    if (NIL_P(opts)) {
        state->check_circular = 1;
        state->allow_nan = 0;
        state->max_nesting = 19;
    } else {
        cState_configure(self, opts);
    }
    state->seen = rb_hash_new();
    state->memo = Qnil;
    state->depth = INT2FIX(0);
    return self;
}