Function maybe_write_ls

src/light.c:570–603

* Part of the light source save routine. Count up the number of light * sources that would be written. If write_it is true, actually write * the light source out. */

 * the light source out.
 */
staticfn int
maybe_write_ls(NHFILE *nhfp, int range, boolean write_it)
{
    int count = 0, is_global;
    light_source *ls;

    for (ls = gl.light_base; ls; ls = ls->next) {
        if (!ls->id.a_monst) {
            impossible("maybe_write_ls: no id! [range=%d]", range);
            continue;
        }
        switch (ls->type) {
        case LS_OBJECT:
            is_global = !obj_is_local(ls->id.a_obj);
            break;
        case LS_MONSTER:
            is_global = !mon_is_local(ls->id.a_monst);
            break;
        default:
            is_global = 0;
            impossible("maybe_write_ls: bad type (%d) [range=%d]", ls->type,
                       range);
            break;
        }
        /* if global and not doing local, or vice versa, count it */
        if (is_global ^ (range == RANGE_LEVEL)) {
            count++;
            if (write_it)
                write_ls(nhfp, ls);
        }
    }

    return count;
}

void
light_sources_sanity_check(void)