Function randomkey

src/cmd.c:3516–3578

choose a random character, biased towards movement commands, primarily for debug-fuzzer testing */

/* choose a random character, biased towards movement commands, primarily
   for debug-fuzzer testing */
char
randomkey(void)
{
    static unsigned i = 0;
    static char last_c = '\0';
    char c;

    /* give ^A and ^P a high probability of being repeated */
    if ((last_c == C('a') || last_c == C('p'))
        && program_state.input_state == commandInp && rn2(5))
        return last_c;

    switch (rn2(16)) {
    default:
        c = '\033';
        break;
    case 0:
        c = '\n';
        break;
    case 1:
    case 2:
    case 3:
    case 4:
        c = (char) rn1('~' - ' ' + 1, ' ');
        break;
    case 5:
        c = (char) (rn2(2) ? '\t' : ' ');
        break;
    case 6:
        c = (char) rn1('z' - 'a' + 1, 'a');
        break;
    case 7:
        c = (char) rn1('Z' - 'A' + 1, 'A');
        break;
    case 8:
        c = extcmdlist[i++ % SIZE(extcmdlist)].key;
        break;
    case 9:
        c = '#';
        break;
    case 10:
    case 11:
    case 12:
        {
            int d = rn2(N_DIRS);
            int m = rn2(7) ? MV_WALK : (!rn2(3) ? MV_RUSH : MV_RUN);

            c = cmd_from_dir(d, m);
        }
        break;
    case 13:
        c = (char) rn1('9' - '0' + 1, '0');
        break;
    case 14:
        /* any char, but avoid '\0' because it's used for mouse click */
        c = (char) rnd(iflags.wc_eight_bit_input ? 255 : 127);
        break;
    }