Video: C Programming on System 6 - User Authentication and Telnet Negotiation

I review some recent commits covering user authentication and telnet negotiation, then write some ANSI output code and a broken function for returning a number's ordinal suffix.

Video notes:

• sha2.c
• strlcpy
• Telnet Protocol Specification
• xorshift32

• Of course after reviewing my video, I realized the ordinal function I wrote was wrong for values over 20. The new code is:

    char *
    ordinal(unsigned short n)
    {
        static char ordbuf[8];
  
        switch (n % 100) {
        case 11:
        case 12:
        case 13:
            sprintf(ordbuf, "%dth", n);
            break;
        default:
            switch (n % 10) {
            case 1:
                sprintf(ordbuf, "%dst", n);
                break;
            case 2:
                sprintf(ordbuf, "%dnd", n);
                break;
            case 3:
                sprintf(ordbuf, "%drd", n);
                break;
            default:
                sprintf(ordbuf, "%dth", n);
            }
        }
  
        return ordbuf;
    }
  

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