base64.hpp

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/*
    Copyright (C) 2003 - 2025
    by David White <dave@whitevine.net>
    Part of the Battle for Wesnoth Project https://www.wesnoth.org/
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY.
 
    See the COPYING file for more details.
*/
 
#pragma once
 
#include <cstdint>
#include "utils/span.hpp"
#include <string>
#include <string_view>
#include <vector>
 
namespace utils
{
using byte_view = utils::span<const uint8_t>;
}
 
// Official Base64 encoding (RFC4648)
namespace base64 {
    std::vector<uint8_t> decode(std::string_view encoded);
    std::string encode(utils::byte_view bytes);
}
// crypt()-compatible radix-64 encoding
namespace crypt64 {
    std::vector<uint8_t> decode(std::string_view encoded);
    std::string encode(utils::byte_view bytes);
    // Single character functions. For special use only
    int decode(char encoded_char);
    char encode(int value);
}