/**
 * Convert a binary input to a base64 output with line breaks.
 *
 * The default option (simdutf::base64_default) uses the characters `+` and `/`
 * as part of its alphabet. Further, it adds padding (`=`) at the end of the
 * output to ensure that the output length is a multiple of four.
 *
 * The URL option (simdutf::base64_url) uses the characters `-` and `_` as part
 * of its alphabet. No padding is added at the end of the output.
 *
 * This function always succeeds.
 *
 * The default line length is default_line_length (76)
 *
 * @param input         the binary to process
 * @param length        the length of the input in bytes
 * @param output        the pointer to a buffer that can hold the conversion
 * result (should be at least base64_length_from_binary(length) bytes long)
 * @param line_length   the length of lines, must be at least 4 (otherwise it is interpreted as 4),
 * @param options       the base64 options to use, can be base64_default or
 * base64_url, is base64_default by default.
 * @return number of written bytes, will be equal to
 * base64_length_from_binary(length, options)
 */
size_t binary_to_base64_with_lines(const char *input, size_t length, char *output,
                        size_t line_length = simdutf::default_line_length,
                        base64_options options = base64_default) noexcept;