Function Base64DecodeBufSize

library/cpp/string_utils/base64/base64.h:9–11

@return Size of the buffer required to decode Base64 encoded data of size `len`. */

/* @return Size of the buffer required to decode Base64 encoded data of size `len`.
 */
constexpr size_t Base64DecodeBufSize(const size_t len) noexcept {
    return (len + 3) / 4 * 3;
}

/* Decode Base64 encoded data. Can decode both regular Base64 and Base64URL encoded data. Can decode
 * only valid Base64[URL] data, behaviour for invalid data is unspecified.