wrap

/*
 * See Zlib::GzipReader#wrap and Zlib::GzipWriter#wrap.
 */
static VALUE
rb_gzfile_s_wrap(argc, argv, klass)
    int argc;
    VALUE *argv;
    VALUE klass;
{
    VALUE obj = rb_class_new_instance(argc, argv, klass);

    if (rb_block_given_p()) {
        return rb_ensure(rb_yield, obj, gzfile_ensure_close, obj);
    }
    else {
        return obj;
    }
}