C :: How To Convert A String To MIME Base 64

I've been trying to write some code to do what I mentioned in the title, but I haven't had much luck. I get very confused when I deal with bitwise operators, so it's hard for me to write this kind of encoding on my own. I need this encodement so I can login to an email account using smtp.

Here is my code so far :

Code:
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
const char base64_table[] =

[Code]......

Gives the output :

Code:
11C
byte offset 0, new_text_sz = 5
11C
byte offset 1, new_text_sz = 5
11C
byte offset 2, new_text_sz = 5
11C
byte offset 3, new_text_sz = 5
AAAA

When according to wikipedia, it should be : T W F u