iconv

/*
 * Document-method: iconv
 * call-seq: Iconv.iconv(to, from, *strs)
 *
 * Shorthand for
 *   Iconv.open(to, from) { |cd|
 *     (strs + [nil]).collect { |s| cd.iconv(s) }
 *   }
 *
 * === Parameters
 *
 * <tt>to, from</tt>:: see Iconv.new
 * <tt>strs</tt>:: strings to be converted
 *
 * === Exceptions
 *
 * Exceptions thrown by Iconv.new, Iconv.open and Iconv#iconv.
 */
static VALUE
iconv_s_iconv
    (argc, argv, self)
    int argc;
    VALUE *argv;
    VALUE self;
{
    struct iconv_env_t arg;

    if (argc < 2)               /* needs `to' and `from' arguments at least */
        rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)", argc, 2);

    arg.argc = argc -= 2;
    arg.argv = argv + 2;
    arg.append = rb_ary_push;
    arg.ret = rb_ary_new2(argc);
    arg.cd = iconv_create(argv[0], argv[1]);
    return rb_ensure(iconv_s_convert, (VALUE)&arg, iconv_free, ICONV2VALUE(arg.cd));
}