Function cmdname_from_func

src/cmd.c:3105–3155

return extended command name (without leading '#') for command (*fn)() */

/* return extended command name (without leading '#') for command (*fn)() */
const char *
cmdname_from_func(
    int (*fn)(void),  /* function whose command name is wanted */
    char outbuf[],    /* place to store the result */
    boolean fullname) /* False: just enough to disambiguate */
{
    const struct ext_func_tab *extcmd, *cmdptr = 0;
    const char *res = 0;

    for (extcmd = extcmdlist; extcmd->ef_txt; ++extcmd)
        if (extcmd->ef_funct == fn) {
            cmdptr = extcmd;
            res = cmdptr->ef_txt;
            break;
        }

    if (!res) {
        /* make sure output buffer doesn't contain junk or stale data;
           return Null below */
        outbuf[0] = '\0';
    } else if (fullname) {
        /* easy; the entire command name */
        res = strcpy(outbuf, res);
    } else {
        const struct ext_func_tab *matchcmd = extcmdlist;
        unsigned len = 0, maxlen = Strlen(res);

        /* find the shortest leading substring which is unambiguous */
        do {
            if (++len >= maxlen)
                break;
            for (extcmd = matchcmd; extcmd->ef_txt; ++extcmd) {
                if (extcmd == cmdptr)
                    continue;
                if ((extcmd->flags & CMD_NOT_AVAILABLE) != 0
                    || ((extcmd->flags & WIZMODECMD) != 0 && !wizard))
                    continue;
                if (!strncmp(res, extcmd->ef_txt, len)) {
                    matchcmd = extcmd;
                    break;
                }
            }
        } while (extcmd->ef_txt);
        copynchars(outbuf, res, len);
        /* [note: for Qt, this debugpline writes a couple dozen lines to
            stdout during menu setup when message window isn't ready yet] */
        debugpline2("shortened %s: \"%s\"", res, outbuf);
        res = outbuf;
    }
    return res;
}

static struct {
    int nhkf;