/*
 *  call-seq:
 *     rng == obj    => true or false
 *  
 *  Returns <code>true</code> only if <i>obj</i> is a Range, has equivalent
 *  beginning and end items (by comparing them with <code>==</code>), and has
 *  the same #exclude_end? setting as <i>rng</t>.
 *     
 *    (0..2) == (0..2)            #=> true
 *    (0..2) == Range.new(0,2)    #=> true
 *    (0..2) == (0...2)           #=> false
 *     
 */

static VALUE
range_eq(VALUE range, VALUE obj)
{
    if (range == obj)
        return Qtrue;
    if (!rb_obj_is_instance_of(obj, rb_obj_class(range)))
        return Qfalse;

    if (!rb_equal(RANGE_BEG(range), RANGE_BEG(obj)))
        return Qfalse;
    if (!rb_equal(RANGE_END(range), RANGE_END(obj)))
        return Qfalse;

    if (EXCL(range) != EXCL(obj))
        return Qfalse;

    return Qtrue;
}