Function tmp_at

src/display.c:1173–1296

} tgfirst;

void
tmp_at(coordxy x, coordxy y)
{
    static struct tmp_glyph *tglyph = (struct tmp_glyph *) 0;
    struct tmp_glyph *tmp;

    switch (x) {
    case DISP_BEAM:
    case DISP_ALL:
    case DISP_TETHER:
    case DISP_FLASH:
    case DISP_ALWAYS:
        if (!tglyph)
            tmp = &tgfirst;
        else /* nested effect; we need dynamic memory */
            tmp = (struct tmp_glyph *) alloc(sizeof *tmp);
        tmp->prev = tglyph;
        tglyph = tmp;
        tglyph->sidx = 0;
        tglyph->style = x;
        tglyph->glyph = y;
        flush_screen(0); /* flush buffered glyphs */
        return;

    case DISP_FREEMEM: /* in case game ends with tmp_at() in progress */
        while (tglyph) {
            tmp = tglyph->prev;
            if (tglyph != &tgfirst)
                free((genericptr_t) tglyph);
            tglyph = tmp;
        }
        return;

    default:
        break;
    }

    if (!tglyph) {
        panic("tmp_at: tglyph not initialized");
    } else {
        switch (x) {
        case DISP_CHANGE:
            tglyph->glyph = y;
            break;

        case DISP_END:
            if (tglyph->style == DISP_BEAM || tglyph->style == DISP_ALL) {
                int i;

                /* Erase (reset) from source to end */
                for (i = 0; i < tglyph->sidx; i++)
                    newsym(tglyph->saved[i].x, tglyph->saved[i].y);
            } else if (tglyph->style == DISP_TETHER) {
                int i;

                if (y == BACKTRACK && tglyph->sidx > 1) {
                    /* backtrack */
                    for (i = tglyph->sidx - 1; i > 0; i--) {