Function getdir

src/cmd.c:3957–4119

prompt for a direction (specified via movement keystroke) and return it in u.dx, u.dy, and u.dz; function return value is 1 for ok, 0 otherwise */

/* prompt for a direction (specified via movement keystroke) and return it
   in u.dx, u.dy, and u.dz; function return value is 1 for ok, 0 otherwise */
int
getdir(const char *s)
{
    char dirsym;
    int is_mov;
    struct _cmd_queue *cmdq = cmdq_pop();

    if (cmdq) {
        if (cmdq->typ == CMDQ_DIR) {
            if (!cmdq->dirz) {
                dirsym = gc.Cmd.dirchars[xytodir(cmdq->dirx, cmdq->diry)];
            } else {
                dirsym = gc.Cmd.dirchars[(cmdq->dirz > 0) ? DIR_DOWN
                                                          : DIR_UP];
            }
        } else if (cmdq->typ == CMDQ_KEY) {
            dirsym = cmdq->key;
        } else {
            cmdq_clear(CQ_CANNED);
            dirsym = '\0';
            impossible("getdir: command queue had no dir?");
        }
        free(cmdq);
        goto got_dirsym;
    }

 retry:
    program_state.input_state = getdirInp;
    if (gi.in_doagain || *readchar_queue) {
        dirsym = readchar();
    } else {
        dirsym = yn_function((s && *s != '^') ? s : "In what direction?",
                             (char *) 0, '\0', FALSE);

        /* for the fuzzer, usually force the result to be a valid direction,
           but sometimes let it exercise the invalid direction code; we
           don't try to enforce no-diagonal for hero in grid bug form since
           things like '^' to look at adjacent trap shouldn't be bound by
           that (caller is expected to handle situations where it matters) */
        if (iflags.debug_fuzzer && rn2(20)) {
            switch (rn2(20)) {
            case 0:
                dirsym = gc.Cmd.spkeys[rn2(2) ? NHKF_GETDIR_SELF : NHKF_ESC];
                break;
            case 1:
                dirsym = gc.Cmd.dirchars[rn2(2) ? DIR_DOWN : DIR_UP];
                break;
            default:
                dirsym = gc.Cmd.dirchars[rn2(N_DIRS)];
                break;
            }
        }
    }
    /* remove the prompt string so caller won't have to */
    clear_nhwindow(WIN_MESSAGE);

    if (redraw_cmd(dirsym)) { /* ^R */
        docrt_flags(docrtRefresh); /* redraw */