Function base64_encode

src/fl/remote/rpc/base64.cpp.hpp:22–60

} // namespace

fl::string base64_encode(fl::span<const fl::u8> data) {
    fl::string out;
    if (data.empty()) return out;

    fl::size encoded_len = 4 * ((data.size() + 2) / 3);
    out.reserve(encoded_len);

    fl::size i = 0;
    fl::size len = data.size();

    while (i + 2 < len) {
        fl::u32 triple = (fl::u32(data[i]) << 16) |
                         (fl::u32(data[i + 1]) << 8) |
                          fl::u32(data[i + 2]);
        out += kBase64Chars[(triple >> 18) & 0x3F];
        out += kBase64Chars[(triple >> 12) & 0x3F];
        out += kBase64Chars[(triple >> 6) & 0x3F];
        out += kBase64Chars[triple & 0x3F];
        i += 3;
    }

    // Handle remaining bytes
    if (i < len) {
        fl::u32 triple = fl::u32(data[i]) << 16;
        if (i + 1 < len) {
            triple |= fl::u32(data[i + 1]) << 8;
        }
        out += kBase64Chars[(triple >> 18) & 0x3F];
        out += kBase64Chars[(triple >> 12) & 0x3F];
        if (i + 1 < len) {
            out += kBase64Chars[(triple >> 6) & 0x3F];
        } else {
            out += '=';
        }
        out += '=';
    }

    return out;
}

fl::vector<fl::u8> base64_decode(const fl::string& encoded) {
    fl::vector<fl::u8> out;