Êîäèðîâàíèå/äåêîäèðîâàíèå base64
================================
int base64_encode(char inp[], char outp[], int len);
Êîäèðîâàíèå ìàññèâà inp äëèíîé len â ìàññèâ outp (ñòðîêó ñ '\0'). Ôóíêöèÿ âîçâðàùàåò äëèíó outp.
int base64_decode(char inp[], char outp[], int len);
Äåêîäèðîâàíèå ìàññèâà inp äëèíîé len â ìàññèâ outp (ñòðîêó ñ '\0'). Ôóíêöèÿ âîçâðàùàåò äëèíó outp.
================================
Albom, 2010