Mine

void irc_parse(struct Buffer* b) {
    register char* p = b->buf, *line = p;
    size_t bytes_parsed = 0;
    struct Command* command;
    struct Sender sender;

    while (p <= (b->buf + b->bytes_used)) {
        if ((*p == '\r') || (*p == '\n')) {
            char* argv[32] = { NULL };
            int argc = 0;

            while (((*p == '\r') || (*p == '\n')) && (p <= (b->buf + b->bytes_used)))
                *p++ = '\0';

            bytes_parsed += (p - line);
            argv[argc++] = line;

            debug("line: %s", line);

            while ((line <= p) && (argc < 32)) {
                if (*line == ' ') {
                    *line++ = '\0';

                    if (*line == ':') {
                        argv[argc++] = ++line;

                        while ((*line != ':') && (line <= p))
                            line++;

                        continue;
                    }

                    argv[argc++] = line;
                }

                line++;
            }

            if (*argv[0] == ':') {
                if ((command = command_find(argv[1])) == NULL)
                    goto keep_going;

                if (strlen(++argv[0]) > 3) {
                    sender.s.client = client_find_by_uid(argv[0]);
                }
                else {
                    sender.s.server = server_find_by_sid(argv[0]);
                    sender.server = true;
                }
            }
            else {
                if ((command = command_find(argv[0])) == NULL)
                    goto keep_going;

                sender.s.server = first_server;
                sender.server = true;
            }

            command->handler(&sender, argc, argv);

keep_going:
            line = p;
            continue;
        }

        p++;
    }

    buffer_remove(b, bytes_parsed);
}