/*      hash */
static VALUE field_hash(VALUE obj)
{
    VALUE h = rb_hash_new();
    rb_hash_aset(h, rb_str_new2("name"), rb_iv_get(obj, "name"));
    rb_hash_aset(h, rb_str_new2("table"), rb_iv_get(obj, "table"));
    rb_hash_aset(h, rb_str_new2("def"), rb_iv_get(obj, "def"));
    rb_hash_aset(h, rb_str_new2("type"), rb_iv_get(obj, "type"));
    rb_hash_aset(h, rb_str_new2("length"), rb_iv_get(obj, "length"));
    rb_hash_aset(h, rb_str_new2("max_length"), rb_iv_get(obj, "max_length"));
    rb_hash_aset(h, rb_str_new2("flags"), rb_iv_get(obj, "flags"));
    rb_hash_aset(h, rb_str_new2("decimals"), rb_iv_get(obj, "decimals"));
    return h;
}

/*      inspect      */
static VALUE field_inspect(VALUE obj)
{
    VALUE n = rb_iv_get(obj, "name");
    VALUE s = rb_str_new(0, RSTRING(n)->len + 16);
    sprintf(RSTRING(s)->ptr, "#<Mysql::Field:%s>", RSTRING(n)->ptr);
    return s;
}

/*      is_not_null? */
static VALUE field_is_not_null(VALUE obj)
{
    return IS_NOT_NULL(NUM2INT(rb_iv_get(obj, "flags"))) ? Qtrue : Qfalse;
}

/*      is_num?      */
static VALUE field_is_num(VALUE obj)
{
    return IS_NUM(NUM2INT(rb_iv_get(obj, "type"))) ? Qtrue : Qfalse;
}

/*      is_pri_key?  */
static VALUE field_is_pri_key(VALUE obj)
{
    return IS_PRI_KEY(NUM2INT(rb_iv_get(obj, "flags"))) ? Qtrue : Qfalse;
}