/* NetHack 3.7	restore.c	$NHDT-Date: 1649530943 2022/04/09 19:02:23 $  $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.194 $ */
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/*-Copyright (c) Michael Allison, 2009. */
/* NetHack may be freely redistributed.  See license for details. */

#include "hack.h"
#include "tcap.h" /* for TERMLIB and ASCIIGRAPH */

#if defined(MICRO)
extern int dotcnt; /* shared with save */
extern int dotrow; /* shared with save */
#endif

#ifdef ZEROCOMP
static void zerocomp_minit(void);
static void zerocomp_mread(int, genericptr_t, unsigned int);
static int zerocomp_mgetc(void);
#endif

static void find_lev_obj(void);
static void restlevchn(NHFILE *);
static void restdamage(NHFILE *);
static void restobj(NHFILE *, struct obj *);
static struct obj *restobjchn(NHFILE *, boolean);
static void restmon(NHFILE *, struct monst *);
static struct monst *restmonchn(NHFILE *);
static struct fruit *loadfruitchn(NHFILE *);
static void freefruitchn(struct fruit *);
static void ghostfruit(struct obj *);
static boolean restgamestate(NHFILE *, unsigned int *, unsigned int *);
static void restlevelstate(unsigned int, unsigned int);
static int restlevelfile(xint8);
static void rest_bubbles(NHFILE *);
static void restore_gamelog(NHFILE *);
static void restore_msghistory(NHFILE *);
static void reset_oattached_mids(boolean);
static void rest_levl(NHFILE *, boolean);
static void rest_stairs(NHFILE *);

/*
 * Save a mapping of IDs from ghost levels to the current level.  This
 * map is used by the timer routines when restoring ghost levels.
 */
#define N_PER_BUCKET 64
struct bucket {
    struct bucket *next;
    struct {
        unsigned gid; /* ghost ID */
        unsigned nid; /* new ID */
    } map[N_PER_BUCKET];
};

static void clear_id_mapping(void);
static void add_id_mapping(unsigned, unsigned);

#ifdef AMII_GRAPHICS
void amii_setpens(int); /* use colors from save file */
extern int amii_numcolors;
#endif

#include "display.h"

#define Is_IceBox(o) ((o)->otyp == ICE_BOX ? TRUE : FALSE)

/* Recalculate g.level.objects[x][y], since this info was not saved. */
static void
find_lev_obj(void)
{
    register struct obj *fobjtmp = (struct obj *) 0;
    register struct obj *otmp;
    int x, y;

    for (x = 0; x < COLNO; x++)
        for (y = 0; y < ROWNO; y++)
            g.level.objects[x][y] = (struct obj *) 0;

    /*
     * Reverse the entire fobj chain, which is necessary so that we can
     * place the objects in the proper order.  Make all obj in chain
     * OBJ_FREE so place_object will work correctly.
     */
    while ((otmp = fobj) != 0) {
        fobj = otmp->nobj;
        otmp->nobj = fobjtmp;
        otmp->where = OBJ_FREE;
        fobjtmp = otmp;
    }
    /* fobj should now be empty */

    /* Set g.level.objects (as well as reversing the chain back again) */
    while ((otmp = fobjtmp) != 0) {
        fobjtmp = otmp->nobj;
        place_object(otmp, otmp->ox, otmp->oy);

        /* fixup(s) performed when restoring the level that the hero
           is on, rather than just an arbitrary one */
        if (u.uz.dlevel) { /* 0 during full restore until current level */
            /* handle uchain and uball when they're on the floor */
            if (otmp->owornmask & (W_BALL | W_CHAIN))
                setworn(otmp, otmp->owornmask);
        }
    }
}

/* Things that were marked "in_use" when the game was saved (ex. via the
 * infamous "HUP" cheat) get used up here.
 */
void
inven_inuse(boolean quietly)
{
    register struct obj *otmp, *otmp2;

    for (otmp = g.invent; otmp; otmp = otmp2) {
        otmp2 = otmp->nobj;
        if (otmp->in_use) {
            if (!quietly)
                pline("Finishing off %s...", xname(otmp));
            useup(otmp);
        }
    }
}

static void
restlevchn(NHFILE* nhfp)
{
    int cnt = 0;
    s_level *tmplev, *x;

    g.sp_levchn = (s_level *) 0;
    if (nhfp->structlevel)
        mread(nhfp->fd, (genericptr_t) &cnt, sizeof(int));

    for (; cnt > 0; cnt--) {
        tmplev = (s_level *) alloc(sizeof(s_level));
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t) tmplev, sizeof(s_level));

        if (!g.sp_levchn)
            g.sp_levchn = tmplev;
        else {
            for (x = g.sp_levchn; x->next; x = x->next)
                ;
            x->next = tmplev;
        }
        tmplev->next = (s_level *) 0;
    }
}

static void
restdamage(NHFILE* nhfp)
{
    unsigned int dmgcount = 0;
    int counter;
    struct damage *tmp_dam;
    boolean ghostly = (nhfp->ftype == NHF_BONESFILE);

    if (nhfp->structlevel)
        mread(nhfp->fd, (genericptr_t) &dmgcount, sizeof dmgcount);
    counter = (int) dmgcount;

    if (!counter)
        return;
    do {
        tmp_dam = (struct damage *) alloc(sizeof *tmp_dam);
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t) tmp_dam, sizeof *tmp_dam);

        if (ghostly)
            tmp_dam->when += (g.moves - g.omoves);

        tmp_dam->next = g.level.damagelist;
        g.level.damagelist = tmp_dam;
    } while (--counter > 0);
}

/* restore one object */
static void
restobj(NHFILE* nhfp, struct obj *otmp)
{
    int buflen = 0;

    if (nhfp->structlevel)
        mread(nhfp->fd, (genericptr_t) otmp, sizeof(struct obj));

    otmp->lua_ref_cnt = 0;
    /* next object pointers are invalid; otmp->cobj needs to be left
       as is--being non-null is key to restoring container contents */
    otmp->nobj = otmp->nexthere = (struct obj *) 0;
    /* non-null oextra needs to be reconstructed */
    if (otmp->oextra) {
        otmp->oextra = newoextra();

        /* oname - object's name */
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t) &buflen, sizeof(buflen));

        if (buflen > 0) { /* includes terminating '\0' */
            new_oname(otmp, buflen);
            if (nhfp->structlevel)
                mread(nhfp->fd, (genericptr_t) ONAME(otmp), buflen);
        }

        /* omonst - corpse or statue might retain full monster details */
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t) &buflen, sizeof(buflen));
        if (buflen > 0) {
            newomonst(otmp);
            /* this is actually a monst struct, so we
               can just defer to restmon() here */
            restmon(nhfp, OMONST(otmp));
        }

        /* omailcmd - feedback mechanism for scroll of mail */
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t) &buflen, sizeof(buflen));
        if (buflen > 0) {
            char *omailcmd = (char *) alloc(buflen);

            if (nhfp->structlevel)
                mread(nhfp->fd, (genericptr_t) omailcmd, buflen);
            new_omailcmd(otmp, omailcmd);
            free((genericptr_t) omailcmd);
        }

        /* omid - monster id number, connecting corpse to ghost */
        newomid(otmp); /* superfluous; we're already allocated otmp->oextra */
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t) &OMID(otmp), sizeof OMID(otmp));
    }
}

static struct obj *
restobjchn(NHFILE* nhfp, boolean frozen)
{
    register struct obj *otmp, *otmp2 = 0;
    register struct obj *first = (struct obj *) 0;
    int buflen = 0;
    boolean ghostly = (nhfp->ftype == NHF_BONESFILE);

    while (1) {
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t) &buflen, sizeof buflen);

        if (buflen == -1)
            break;

        otmp = newobj();
        restobj(nhfp, otmp);
        if (!first)
            first = otmp;
        else
            otmp2->nobj = otmp;

        if (ghostly) {
            unsigned nid = next_ident();

            add_id_mapping(otmp->o_id, nid);
            otmp->o_id = nid;
        }
        if (ghostly && otmp->otyp == SLIME_MOLD)
            ghostfruit(otmp);
        /* Ghost levels get object age shifted from old player's clock
         * to new player's clock.  Assumption: new player arrived
         * immediately after old player died.
         */
        if (ghostly && !frozen && !age_is_relative(otmp))
            otmp->age = g.moves - g.omoves + otmp->age;

        /* get contents of a container or statue */
        if (Has_contents(otmp)) {
            struct obj *otmp3;

            otmp->cobj = restobjchn(nhfp, Is_IceBox(otmp));
            /* restore container back pointers */
            for (otmp3 = otmp->cobj; otmp3; otmp3 = otmp3->nobj)
                otmp3->ocontainer = otmp;
        }
        if (otmp->bypass)
            otmp->bypass = 0;
        if (!ghostly) {
            /* fix the pointers */
            if (otmp->o_id == g.context.victual.o_id)
                g.context.victual.piece = otmp;
            if (otmp->o_id == g.context.tin.o_id)
                g.context.tin.tin = otmp;
            if (otmp->o_id == g.context.spbook.o_id)
                g.context.spbook.book = otmp;
        }
        otmp2 = otmp;
    }
    if (first && otmp2->nobj) {
        impossible("Restobjchn: error reading objchn.");
        otmp2->nobj = 0;
    }

    return first;
}

/* restore one monster */
static void
restmon(NHFILE* nhfp, struct monst* mtmp)
{
    int buflen = 0;

    if (nhfp->structlevel)
        mread(nhfp->fd, (genericptr_t) mtmp, sizeof(struct monst));

    /* next monster pointer is invalid */
    mtmp->nmon = (struct monst *) 0;
    /* non-null mextra needs to be reconstructed */
    if (mtmp->mextra) {
        mtmp->mextra = newmextra();

        /* mgivenname - monster's name */
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t) &buflen, sizeof(buflen));
        if (buflen > 0) { /* includes terminating '\0' */
            new_mgivenname(mtmp, buflen);
            if (nhfp->structlevel)
                mread(nhfp->fd, (genericptr_t) MGIVENNAME(mtmp), buflen);
        }
        /* egd - vault guard */
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t) &buflen, sizeof buflen);

        if (buflen > 0) {
            newegd(mtmp);
            if (nhfp->structlevel)
                mread(nhfp->fd, (genericptr_t) EGD(mtmp), sizeof (struct egd));
        }
        /* epri - temple priest */
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t) &buflen, sizeof(buflen));
        if (buflen > 0) {
            newepri(mtmp);
            if (nhfp->structlevel)
                mread(nhfp->fd, (genericptr_t) EPRI(mtmp),
                      sizeof (struct epri));
        }
        /* eshk - shopkeeper */
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t) &buflen, sizeof(buflen));
        if (buflen > 0) {
            neweshk(mtmp);
            if (nhfp->structlevel)
                mread(nhfp->fd, (genericptr_t) ESHK(mtmp),
                      sizeof (struct eshk));
        }
        /* emin - minion */
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t) &buflen, sizeof(buflen));
        if (buflen > 0) {
            newemin(mtmp);
            if (nhfp->structlevel)
                mread(nhfp->fd, (genericptr_t) EMIN(mtmp),
                      sizeof (struct emin));
        }
        /* edog - pet */
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t) &buflen, sizeof(buflen));
        if (buflen > 0) {
            newedog(mtmp);
            if (nhfp->structlevel)
                mread(nhfp->fd, (genericptr_t) EDOG(mtmp),
                      sizeof (struct edog));
        }
        /* mcorpsenm - obj->corpsenm for mimic posing as corpse or
           statue (inline int rather than pointer to something) */
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t) &MCORPSENM(mtmp),
                  sizeof MCORPSENM(mtmp));
    } /* mextra */
}

static struct monst *
restmonchn(NHFILE* nhfp)
{
    register struct monst *mtmp, *mtmp2 = 0;
    register struct monst *first = (struct monst *) 0;
    int offset, buflen = 0;
    boolean ghostly = (nhfp->ftype == NHF_BONESFILE);

    while (1) {
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t) &buflen, sizeof(buflen));
        if (buflen == -1)
            break;

        mtmp = newmonst();
        restmon(nhfp, mtmp);
        if (!first)
            first = mtmp;
        else
            mtmp2->nmon = mtmp;

        if (ghostly) {
            unsigned nid = next_ident();

            add_id_mapping(mtmp->m_id, nid);
            mtmp->m_id = nid;
        }
        offset = mtmp->mnum;
        mtmp->data = &mons[offset];
        if (ghostly) {
            int mndx = monsndx(mtmp->data);
            if (propagate(mndx, TRUE, ghostly) == 0) {
                /* cookie to trigger purge in getbones() */
                mtmp->mhpmax = DEFUNCT_MONSTER;
            }
        }
        if (mtmp->minvent) {
            struct obj *obj;
            mtmp->minvent = restobjchn(nhfp, FALSE);
            /* restore monster back pointer */
            for (obj = mtmp->minvent; obj; obj = obj->nobj)
                obj->ocarry = mtmp;
        }
        if (mtmp->mw) {
            struct obj *obj;

            for (obj = mtmp->minvent; obj; obj = obj->nobj)
                if (obj->owornmask & W_WEP)
                    break;
            if (obj)
                mtmp->mw = obj;
            else {
                MON_NOWEP(mtmp);
                impossible("bad monster weapon restore");
            }
        }

        if (mtmp->isshk)
            restshk(mtmp, ghostly);
        if (mtmp->ispriest)
            restpriest(mtmp, ghostly);

        if (!ghostly) {
            if (mtmp->m_id == g.context.polearm.m_id)
                g.context.polearm.hitmon = mtmp;
        }
        mtmp2 = mtmp;
    }
    if (first && mtmp2->nmon) {
        impossible("Restmonchn: error reading monchn.");
        mtmp2->nmon = 0;
    }
    return first;
}

static struct fruit *
loadfruitchn(NHFILE* nhfp)
{
    register struct fruit *flist, *fnext;

    flist = 0;
    for (;;) {
        fnext = newfruit();
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t)fnext, sizeof *fnext);
        if (fnext->fid != 0) {
            fnext->nextf = flist;
            flist = fnext;
        } else
            break;
    }
    dealloc_fruit(fnext);
    return flist;
}

static void
freefruitchn(register struct fruit* flist)
{
    register struct fruit *fnext;

    while (flist) {
        fnext = flist->nextf;
        dealloc_fruit(flist);
        flist = fnext;
    }
}

static void
ghostfruit(register struct obj* otmp)
{
    register struct fruit *oldf;

    for (oldf = g.oldfruit; oldf; oldf = oldf->nextf)
        if (oldf->fid == otmp->spe)
            break;

    if (!oldf)
        impossible("no old fruit?");
    else
        otmp->spe = fruitadd(oldf->fname, (struct fruit *) 0);
}

#ifdef SYSCF
#define SYSOPT_CHECK_SAVE_UID sysopt.check_save_uid
#else
#define SYSOPT_CHECK_SAVE_UID TRUE
#endif

static
boolean
restgamestate(NHFILE* nhfp, unsigned int* stuckid, unsigned int* steedid)
{
    struct flag newgameflags;
    struct context_info newgamecontext; /* all 0, but has some pointers */
    struct obj *otmp;
    struct obj *bc_obj;
    char timebuf[15];
    unsigned long uid = 0;
    boolean defer_perm_invent;

    if (nhfp->structlevel)
        mread(nhfp->fd, (genericptr_t) &uid, sizeof uid);

    if (SYSOPT_CHECK_SAVE_UID
        && uid != (unsigned long) getuid()) { /* strange ... */
        /* for wizard mode, issue a reminder; for others, treat it
           as an attempt to cheat and refuse to restore this file */
        pline("Saved game was not yours.");
        if (!wizard)
            return FALSE;
    }

    newgamecontext = g.context; /* copy statically init'd context */
    if (nhfp->structlevel)
        mread(nhfp->fd, (genericptr_t) &g.context, sizeof (struct context_info));
    g.context.warntype.species = (g.context.warntype.speciesidx >= LOW_PM)
                                  ? &mons[g.context.warntype.speciesidx]
                                  : (struct permonst *) 0;
    /* g.context.victual.piece, .tin.tin, .spellbook.book, and .polearm.hitmon
       are pointers which get set to Null during save and will be recovered
       via corresponding o_id or m_id while objs or mons are being restored */

    /* we want to be able to revert to command line/environment/config
       file option values instead of keeping old save file option values
       if partial restore fails and we resort to starting a new game */
    newgameflags = flags;
    if (nhfp->structlevel)
        mread(nhfp->fd, (genericptr_t) &flags, sizeof (struct flag));

    /* avoid keeping permanent inventory window up to date during restore
       (setworn() calls update_inventory); attempting to include the cost
       of unpaid items before shopkeeper's bill is available is a no-no;
       named fruit names aren't accessible yet either
       [3.6.2: moved perm_invent from flags to iflags to keep it out of
       save files; retaining the override here is simpler than trying to
       to figure out where it really belongs now] */
    defer_perm_invent = iflags.perm_invent;
    iflags.perm_invent = FALSE;
    /* wizard and discover are actually flags.debug and flags.explore;
       player might be overriding the save file values for them;
       in the discover case, we don't want to set that for a normal
       game until after the save file has been removed */
    iflags.deferred_X = (newgameflags.explore && !discover);
    if (newgameflags.debug) {
        /* authorized by startup code; wizard mode exists and is allowed */
        wizard = TRUE, discover = iflags.deferred_X = FALSE;
    } else if (wizard) {
        /* specified by save file; check authorization now */
        set_playmode();
    }
    role_init(); /* Reset the initial role, race, gender, and alignment */
#ifdef AMII_GRAPHICS
    amii_setpens(amii_numcolors); /* use colors from save file */
#endif
    if (nhfp->structlevel)
        mread(nhfp->fd, (genericptr_t) &u, sizeof(struct you));
    g.youmonst.cham = u.mcham;

    if (nhfp->structlevel)
        mread(nhfp->fd, (genericptr_t) timebuf, 14);
    timebuf[14] = '\0';
    ubirthday = time_from_yyyymmddhhmmss(timebuf);
    if (nhfp->structlevel)
        mread(nhfp->fd, &urealtime.realtime, sizeof urealtime.realtime);

    if (nhfp->structlevel)
        mread(nhfp->fd, (genericptr_t) timebuf, 14);
    timebuf[14] = '\0';
    urealtime.start_timing = time_from_yyyymmddhhmmss(timebuf);

    /* current time is the time to use for next urealtime.realtime update */
    urealtime.start_timing = getnow();

    set_uasmon();
#ifdef CLIPPING
    cliparound(u.ux, u.uy);
#endif
    if (u.uhp <= 0 && (!Upolyd || u.mh <= 0)) {
        u.ux = u.uy = 0; /* affects pline() [hence You()] */
        You("were not healthy enough to survive restoration.");
        /* wiz1_level.dlevel is used by mklev.c to see if lots of stuff is
         * uninitialized, so we only have to set it and not the other stuff.
         */
        wiz1_level.dlevel = 0;
        u.uz.dnum = 0;
        u.uz.dlevel = 1;
        /* revert to pre-restore option settings */
        iflags.deferred_X = FALSE;
        iflags.perm_invent = defer_perm_invent;
        flags = newgameflags;
        g.context = newgamecontext;
        g.youmonst = cg.zeromonst;
        return FALSE;
    }
    /* in case hangup save occurred in midst of level change */
    assign_level(&u.uz0, &u.uz);

    /* this stuff comes after potential aborted restore attempts */
    restore_killers(nhfp);
    restore_timers(nhfp, RANGE_GLOBAL, 0L);
    restore_light_sources(nhfp);

    g.invent = restobjchn(nhfp, FALSE);

    /* restore dangling (not on floor or in inventory) ball and/or chain */
    bc_obj = restobjchn(nhfp, FALSE);
    while (bc_obj) {
        struct obj *nobj = bc_obj->nobj;

        bc_obj->nobj = (struct obj *) 0;
        if (bc_obj->owornmask)
            setworn(bc_obj, bc_obj->owornmask);
        bc_obj = nobj;
    }
    g.migrating_objs = restobjchn(nhfp, FALSE);
    g.migrating_mons = restmonchn(nhfp);

    if (nhfp->structlevel) {
        mread(nhfp->fd, (genericptr_t) g.mvitals, sizeof g.mvitals);
    }

    /*
     * There are some things after this that can have unintended display
     * side-effects too early in the game.
     * Disable see_monsters() here, re-enable it at the top of moveloop()
     */
    g.defer_see_monsters = TRUE;

    /* this comes after inventory has been loaded */
    for (otmp = g.invent; otmp; otmp = otmp->nobj)
        if (otmp->owornmask)
            setworn(otmp, otmp->owornmask);

    /* reset weapon so that player will get a reminder about "bashing"
       during next fight when bare-handed or wielding an unconventional
       item; for pick-axe, we aren't able to distinguish between having
       applied or wielded it, so be conservative and assume the former */
    otmp = uwep;   /* `uwep' usually init'd by setworn() in loop above */
    uwep = 0;      /* clear it and have setuwep() reinit */
    setuwep(otmp); /* (don't need any null check here) */
    if (!uwep || uwep->otyp == PICK_AXE || uwep->otyp == GRAPPLING_HOOK)
        g.unweapon = TRUE;

    restore_dungeon(nhfp);
    restlevchn(nhfp);
    if (nhfp->structlevel) {
        mread(nhfp->fd, (genericptr_t) &g.moves, sizeof g.moves);
        /* hero_seq isn't saved and restored because it can be recalculated */
        g.hero_seq = g.moves << 3; /* normally handled in moveloop() */
        mread(nhfp->fd, (genericptr_t) &g.quest_status,
              sizeof (struct q_score));
        mread(nhfp->fd, (genericptr_t) g.spl_book,
              (MAXSPELL + 1) * sizeof (struct spell));
    }
    restore_artifacts(nhfp);
    restore_oracles(nhfp);
    if (u.ustuck) {
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t) stuckid, sizeof *stuckid);
    }
    if (u.usteed) {
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t) steedid, sizeof *steedid);
    }
    if (nhfp->structlevel) {
        mread(nhfp->fd, (genericptr_t) g.pl_character, sizeof g.pl_character);
        mread(nhfp->fd, (genericptr_t) g.pl_fruit, sizeof g.pl_fruit);
    }
    freefruitchn(g.ffruit); /* clean up fruit(s) made by initoptions() */
    g.ffruit = loadfruitchn(nhfp);

    restnames(nhfp);
    restore_msghistory(nhfp);
    restore_gamelog(nhfp);
    /* must come after all mons & objs are restored */
    relink_timers(FALSE);
    relink_light_sources(FALSE);
    /* inventory display is now viable */
    iflags.perm_invent = defer_perm_invent;
    return TRUE;
}

/* update game state pointers to those valid for the current level (so we
 * don't dereference a wild u.ustuck when saving the game state, for instance)
 */
static void
restlevelstate(unsigned int stuckid, unsigned int steedid)
{
    register struct monst *mtmp;

    if (stuckid) {
        for (mtmp = fmon; mtmp; mtmp = mtmp->nmon)
            if (mtmp->m_id == stuckid)
                break;
        if (!mtmp)
            panic("Cannot find the monster ustuck.");
        set_ustuck(mtmp);
    }
    if (steedid) {
        for (mtmp = fmon; mtmp; mtmp = mtmp->nmon)
            if (mtmp->m_id == steedid)
                break;
        if (!mtmp)
            panic("Cannot find the monster usteed.");
        u.usteed = mtmp;
        remove_monster(mtmp->mx, mtmp->my);
    }
}

/*ARGSUSED*/
static int
restlevelfile(xint8 ltmp)
{
    char whynot[BUFSZ];
    NHFILE *nhfp = (NHFILE *) 0;

    nhfp = create_levelfile(ltmp, whynot);
    if (!nhfp) {
        /* BUG: should suppress any attempt to write a panic
           save file if file creation is now failing... */
        panic("restlevelfile: %s", whynot);
    }
    bufon(nhfp->fd);
    nhfp->mode = WRITING | FREEING;
    savelev(nhfp, ltmp);
    close_nhfile(nhfp);
    return 2;
}

int
dorecover(NHFILE* nhfp)
{
    unsigned int stuckid = 0, steedid = 0; /* not a register */
    xint8 ltmp = 0;
    int rtmp;

    /* suppress map display if some part of the code tries to update that */
    g.program_state.restoring = 1;

    get_plname_from_file(nhfp, g.plname);
    getlev(nhfp, 0, (xint8) 0);
    if (!restgamestate(nhfp, &stuckid, &steedid)) {
        NHFILE tnhfp;

        display_nhwindow(WIN_MESSAGE, TRUE);
        zero_nhfile(&tnhfp);
        tnhfp.mode = FREEING;
        tnhfp.fd = -1;
        savelev(&tnhfp, 0); /* discard current level */
        /* no need tfor close_nhfile(&tnhfp), which
           is not really affiliated with an open file */
        close_nhfile(nhfp);
        (void) delete_savefile();
        g.program_state.restoring = 0;
        return 0;
    }
    restlevelstate(stuckid, steedid);
#ifdef INSURANCE
    savestateinlock();
#endif
    rtmp = restlevelfile(ledger_no(&u.uz));
    if (rtmp < 2)
        return rtmp; /* dorecover called recursively */

    /* these pointers won't be valid while we're processing the
     * other levels, but they'll be reset again by restlevelstate()
     * afterwards, and in the meantime at least u.usteed may mislead
     * place_monster() on other levels
     */
    u.ustuck = (struct monst *) 0;
    u.usteed = (struct monst *) 0;

#ifdef MICRO
#ifdef AMII_GRAPHICS
    {
        extern struct window_procs amii_procs;
        if (WINDOWPORT(amii)) {
            extern winid WIN_BASE;
            clear_nhwindow(WIN_BASE); /* hack until there's a hook for this */
        }
    }
#else
        clear_nhwindow(WIN_MAP);
#endif
    clear_nhwindow(WIN_MESSAGE);
    You("return to level %d in %s%s.", depth(&u.uz),
        g.dungeons[u.uz.dnum].dname,
        flags.debug ? " while in debug mode"
                    : flags.explore ? " while in explore mode" : "");
    curs(WIN_MAP, 1, 1);
    dotcnt = 0;
    dotrow = 2;
    if (!WINDOWPORT(X11))
        putstr(WIN_MAP, 0, "Restoring:");
#endif
    restoreinfo.mread_flags = 1; /* return despite error */
    while (1) {
        if (nhfp->structlevel) {
            mread(nhfp->fd, (genericptr_t) &ltmp, sizeof ltmp);
            if (restoreinfo.mread_flags == -1)
                break;
        }
        getlev(nhfp, 0, ltmp);
#ifdef MICRO
        curs(WIN_MAP, 1 + dotcnt++, dotrow);
        if (dotcnt >= (COLNO - 1)) {
            dotrow++;
            dotcnt = 0;
        }
        if (!WINDOWPORT(X11)) {
            putstr(WIN_MAP, 0, ".");
        }
        mark_synch();
#endif
        rtmp = restlevelfile(ltmp);
        if (rtmp < 2)
            return rtmp; /* dorecover called recursively */
    }
    restoreinfo.mread_flags = 0;
    rewind_nhfile(nhfp);        /* return to beginning of file */
    (void) validate(nhfp, (char *) 0);
    get_plname_from_file(nhfp, g.plname);

    getlev(nhfp, 0, (xint8) 0);
    close_nhfile(nhfp);
    restlevelstate(stuckid, steedid);
    g.program_state.something_worth_saving = 1; /* useful data now exists */

    if (!wizard && !discover)
        (void) delete_savefile();
    if (Is_rogue_level(&u.uz))
        assign_graphics(ROGUESET);
    reset_glyphmap(gm_levelchange);
    max_rank_sz(); /* to recompute g.mrank_sz (botl.c) */
    init_oclass_probs(); /* recompute g.oclass_prob_totals[] */

    if ((uball && !uchain) || (uchain && !uball)) {
        impossible("restgamestate: lost ball & chain");
        /* poor man's unpunish() */
        setworn((struct obj *) 0, W_CHAIN);
        setworn((struct obj *) 0, W_BALL);
    }

    /* in_use processing must be after:
     *    + The inventory has been read so that freeinv() works.
     *    + The current level has been restored so billing information
     *      is available.
     */
    inven_inuse(FALSE);

    /* Set up the vision internals, after levl[] data is loaded
       but before docrt(). */
    reglyph_darkroom();
    vision_reset();
    g.vision_full_recalc = 1; /* recompute vision (not saved) */

    run_timers(); /* expire all timers that have gone off while away */
    g.program_state.restoring = 0; /* affects bot() so clear before docrt() */

    if (g.early_raw_messages && !g.program_state.beyond_savefile_load) {
        /*
         * We're about to obliterate some potentially important
         * startup messages, so give the player a chance to see them.
         */
        g.early_raw_messages = 0;
        wait_synch();
    }
    g.program_state.beyond_savefile_load = 1;

    docrt();
    clear_nhwindow(WIN_MESSAGE);

    /* Success! */
    welcome(FALSE);
    check_special_room(FALSE);
    return 1;
}

static void
rest_stairs(NHFILE* nhfp)
{
    int buflen = 0;
    stairway stway = UNDEFINED_VALUES;
    stairway *newst;

    stairway_free_all();
    while (1) {
        if (nhfp->structlevel) {
            mread(nhfp->fd, (genericptr_t) &buflen, sizeof buflen);
        }

        if (buflen == -1)
            break;

        if (nhfp->structlevel) {
            mread(nhfp->fd, (genericptr_t) &stway, sizeof (stairway));
        }
        if (stway.tolev.dnum == u.uz.dnum) {
            /* stairway dlevel is relative, make it absolute */
            stway.tolev.dlevel += u.uz.dlevel;
        }
        stairway_add(stway.sx, stway.sy, stway.up, stway.isladder,
                     &(stway.tolev));
        newst = stairway_at(stway.sx, stway.sy);
        if (newst)
            newst->u_traversed = stway.u_traversed;
    }
}

void
restcemetery(NHFILE* nhfp, struct cemetery** cemeteryaddr)
{
    struct cemetery *bonesinfo, **bonesaddr;
    int cflag = 0;

    if (nhfp->structlevel)
        mread(nhfp->fd, (genericptr_t) &cflag, sizeof cflag);
    if (cflag == 0) {
        bonesaddr = cemeteryaddr;
        do {
            bonesinfo = (struct cemetery *) alloc(sizeof *bonesinfo);
            if (nhfp->structlevel)
                mread(nhfp->fd, (genericptr_t) bonesinfo, sizeof *bonesinfo);
            *bonesaddr = bonesinfo;
            bonesaddr = &(*bonesaddr)->next;
        } while (*bonesaddr);
    } else {
        *cemeteryaddr = 0;
    }
}

/*ARGSUSED*/
static void
rest_levl(
    NHFILE *nhfp,
#ifdef RLECOMP
    boolean rlecomp
#else
    boolean rlecomp UNUSED
#endif
)
{
#ifdef RLECOMP
    short i, j;
    uchar len;
    struct rm r;

    if (rlecomp) {
        (void) memset((genericptr_t) &r, 0, sizeof(r));
        i = 0;
        j = 0;
        len = 0;
        while (i < ROWNO) {
            while (j < COLNO) {
                if (len > 0) {
                    levl[j][i] = r;
                    len -= 1;
                    j += 1;
                } else {
                    if (nhfp->structlevel) {
                        mread(nhfp->fd, (genericptr_t) &len, sizeof(uchar));
                        mread(nhfp->fd, (genericptr_t) &r, sizeof(struct rm));
                    }
                }
            }
            j = 0;
            i += 1;
        }
        return;
    }
#endif /* RLECOMP */
    if (nhfp->structlevel) {
        mread(nhfp->fd, (genericptr_t) levl, sizeof levl);
    }
}

void
trickery(char *reason)
{
    pline("Strange, this map is not as I remember it.");
    pline("Somebody is trying some trickery here...");
    pline("This game is void.");
    Strcpy(g.killer.name, reason ? reason : "");
    done(TRICKED);
}

void
getlev(NHFILE* nhfp, int pid, xint8 lev)
{
    register struct trap *trap;
    register struct monst *mtmp;
    long elapsed;
    branch *br;
    int hpid = 0;
    xint8 dlvl = 0;
    int x, y;
    boolean ghostly = (nhfp->ftype == NHF_BONESFILE);
#ifdef TOS
    short tlev;
#endif

    if (ghostly)
        clear_id_mapping();

#if defined(MSDOS) || defined(OS2)
    if (nhfp->structlevel)
        setmode(nhfp->fd, O_BINARY);
#endif
    /* Load the old fruit info.  We have to do it first, so the
     * information is available when restoring the objects.
     */
    if (ghostly)
        g.oldfruit = loadfruitchn(nhfp);

    /* First some sanity checks */
    if (nhfp->structlevel)
        mread(nhfp->fd, (genericptr_t) &hpid, sizeof(hpid));

/* CHECK:  This may prevent restoration */
#ifdef TOS
    if (nhfp->structlevel)
        mread(nhfp->fd, (genericptr_t) &tlev, sizeof(tlev));
    dlvl = tlev & 0x00ff;
#else
    if (nhfp->structlevel)
        mread(nhfp->fd, (genericptr_t) &dlvl, sizeof(dlvl));
#endif
    if ((pid && pid != hpid) || (lev && dlvl != lev)) {
        char trickbuf[BUFSZ];

        if (pid && pid != hpid)
            Sprintf(trickbuf, "PID (%d) doesn't match saved PID (%d)!", hpid,
                    pid);
        else
            Sprintf(trickbuf, "This is level %d, not %d!", dlvl, lev);
        if (wizard)
            pline1(trickbuf);
        trickery(trickbuf);
    }
    restcemetery(nhfp, &g.level.bonesinfo);
    rest_levl(nhfp,
              (boolean) ((sfrestinfo.sfi1 & SFI1_RLECOMP) == SFI1_RLECOMP));
    if (nhfp->structlevel) {
        mread(nhfp->fd, (genericptr_t) g.lastseentyp, sizeof(g.lastseentyp));
        mread(nhfp->fd, (genericptr_t) &g.omoves, sizeof(g.omoves));
    }
    elapsed = g.moves - g.omoves;

    if (nhfp->structlevel) {
        rest_stairs(nhfp);
        mread(nhfp->fd, (genericptr_t)&g.updest, sizeof(dest_area));
        mread(nhfp->fd, (genericptr_t)&g.dndest, sizeof(dest_area));
        mread(nhfp->fd, (genericptr_t)&g.level.flags, sizeof(g.level.flags));
        mread(nhfp->fd, (genericptr_t)g.doors, sizeof(g.doors));
    }
    rest_rooms(nhfp); /* No joke :-) */
    if (g.nroom)
        g.doorindex = g.rooms[g.nroom - 1].fdoor + g.rooms[g.nroom - 1].doorct;
    else
        g.doorindex = 0;

    restore_timers(nhfp, RANGE_LEVEL, elapsed);
    restore_light_sources(nhfp);
    fmon = restmonchn(nhfp);

    /* rest_worm(fd); */    /* restore worm information */
    rest_worm(nhfp);    /* restore worm information */

    g.ftrap = 0;
    for (;;) {
        trap = newtrap();
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t)trap, sizeof(struct trap));
        if (trap->tx != 0) {
            trap->ntrap = g.ftrap;
            g.ftrap = trap;
        } else
            break;
    }
    dealloc_trap(trap);

    fobj = restobjchn(nhfp, FALSE);
    find_lev_obj();
    /* restobjchn()'s `frozen' argument probably ought to be a callback
       routine so that we can check for objects being buried under ice */
    g.level.buriedobjlist = restobjchn(nhfp, FALSE);
    g.billobjs = restobjchn(nhfp, FALSE);
    rest_engravings(nhfp);

    /* reset level.monsters for new level */
    for (x = 0; x < COLNO; x++)
        for (y = 0; y < ROWNO; y++)
            g.level.monsters[x][y] = (struct monst *) 0;
    for (mtmp = fmon; mtmp; mtmp = mtmp->nmon) {
        if (mtmp->isshk)
            set_residency(mtmp, FALSE);
        place_monster(mtmp, mtmp->mx, mtmp->my);
        if (mtmp->wormno)
            place_wsegs(mtmp, NULL);
        if (hides_under(mtmp->data) && mtmp->mundetected)
            (void) hideunder(mtmp);

        /* regenerate monsters while on another level */
        if (!u.uz.dlevel)
            continue;
        if (ghostly) {
            /* reset peaceful/malign relative to new character;
               shopkeepers will reset based on name */
            if (!mtmp->isshk)
                mtmp->mpeaceful = (is_unicorn(mtmp->data)
                                   && (sgn(u.ualign.type)
                                       == sgn(mtmp->data->maligntyp))) ? 1
                                  : peace_minded(mtmp->data);
            set_malign(mtmp);
        } else if (elapsed > 0L) {
            mon_catchup_elapsed_time(mtmp, elapsed);
        }
        /* update shape-changers in case protection against
           them is different now than when the level was saved */
        restore_cham(mtmp);
        /* give hiders a chance to hide before their next move */
        if (ghostly || (elapsed > 00 && elapsed > (long) rnd(10)))
            hide_monst(mtmp);
    }
    restdamage(nhfp);
    rest_regions(nhfp);
    rest_bubbles(nhfp); /* for water and air; empty marker on other levels */

    if (ghostly) {
        stairway *stway = g.stairs;
        while (stway) {
            if (!stway->isladder && !stway->up
                && stway->tolev.dnum == u.uz.dnum)
                break;
            stway = stway->next;
        }

        /* Now get rid of all the temp fruits... */
        freefruitchn(g.oldfruit), g.oldfruit = 0;

        if (lev > ledger_no(&medusa_level)
            && lev < ledger_no(&stronghold_level) && !stway) {
            coord cc;
            d_level dest;

            dest.dnum = u.uz.dnum;
            dest.dlevel = u.uz.dlevel + 1;

            mazexy(&cc);
            stairway_add(cc.x, cc.y, FALSE, FALSE, &dest);
            levl[cc.x][cc.y].typ = STAIRS;
        }

        br = Is_branchlev(&u.uz);
        if (br && u.uz.dlevel == 1) {
            d_level ltmp;

            if (on_level(&u.uz, &br->end1))
                assign_level(&ltmp, &br->end2);
            else
                assign_level(&ltmp, &br->end1);

            switch (br->type) {
            case BR_STAIR:
            case BR_NO_END1:
            case BR_NO_END2:
                stway = g.stairs;
                while (stway) {
                    if (stway->tolev.dnum != u.uz.dnum)
                        break;
                    stway = stway->next;
                }
                if (stway)
                    assign_level(&(stway->tolev), &ltmp);
                break;
            case BR_PORTAL: /* max of 1 portal per level */
                for (trap = g.ftrap; trap; trap = trap->ntrap)
                    if (trap->ttyp == MAGIC_PORTAL)
                        break;
                if (!trap)
                    panic("getlev: need portal but none found");
                assign_level(&trap->dst, &ltmp);
                break;
            }
        } else if (!br) {
            struct trap *ttmp = 0;

            /* Remove any dangling portals. */
            for (trap = g.ftrap; trap; trap = ttmp) {
                ttmp = trap->ntrap;
                if (trap->ttyp == MAGIC_PORTAL)
                    deltrap(trap);
            }
        }
    }

    /* must come after all mons & objs are restored */
    relink_timers(ghostly);
    relink_light_sources(ghostly);
    reset_oattached_mids(ghostly);

    if (ghostly)
        clear_id_mapping();
}

void
get_plname_from_file(NHFILE* nhfp, char *plbuf)
{
    int pltmpsiz = 0;

    if (nhfp->structlevel) {
        (void) read(nhfp->fd, (genericptr_t) &pltmpsiz, sizeof(pltmpsiz));
        (void) read(nhfp->fd, (genericptr_t) plbuf, pltmpsiz);
    }
    return;
}

/* restore Plane of Water's air bubbles and Plane of Air's clouds */
static void
rest_bubbles(NHFILE *nhfp)
{
    xint8 bbubbly;

    /* whether or not the Plane of Water's air bubbles or Plane of Air's
       clouds are present is recorded during save so that we don't have to
       know what level is being restored */
    bbubbly = 0;
    if (nhfp->structlevel)
        mread(nhfp->fd, (genericptr_t) &bbubbly, sizeof bbubbly);

    if (bbubbly)
        restore_waterlevel(nhfp);
}

static void
restore_gamelog(NHFILE* nhfp)
{
    int slen = 0;
    char msg[BUFSZ*2];
    struct gamelog_line tmp;

    while (1) {
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t)&slen, sizeof(slen));
        if (slen == -1)
            break;
        if (slen > ((BUFSZ*2) - 1))
            panic("restore_gamelog: msg too big (%d)", slen);
        if (nhfp->structlevel) {
            mread(nhfp->fd, (genericptr_t) msg, slen);
            mread(nhfp->fd, (genericptr_t) &tmp, sizeof(tmp));
            msg[slen] = '\0';
            gamelog_add(tmp.flags, tmp.turn, msg);
        }
    }
}

static void
restore_msghistory(NHFILE* nhfp)
{
    int msgsize = 0, msgcount = 0;
    char msg[BUFSZ];

    while (1) {
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t) &msgsize, sizeof(msgsize));
        if (msgsize == -1)
            break;
        if (msgsize > (BUFSZ - 1))
            panic("restore_msghistory: msg too big (%d)", msgsize);
        if (nhfp->structlevel)
            mread(nhfp->fd, (genericptr_t) msg, msgsize);
        msg[msgsize] = '\0';
        putmsghistory(msg, TRUE);
        ++msgcount;
    }
    if (msgcount)
        putmsghistory((char *) 0, TRUE);
    debugpline1("Read %d messages from savefile.", msgcount);
}

/* Clear all structures for object and monster ID mapping. */
static void
clear_id_mapping(void)
{
    struct bucket *curr;

    while ((curr = g.id_map) != 0) {
        g.id_map = curr->next;
        free((genericptr_t) curr);
    }
    g.n_ids_mapped = 0;
}

/* Add a mapping to the ID map. */
static void
add_id_mapping(unsigned int gid, unsigned int nid)
{
    int idx;

    idx = g.n_ids_mapped % N_PER_BUCKET;
    /* idx is zero on first time through, as well as when a new bucket is */
    /* needed */
    if (idx == 0) {
        struct bucket *gnu = (struct bucket *) alloc(sizeof(struct bucket));
        gnu->next = g.id_map;
        g.id_map = gnu;
    }

    g.id_map->map[idx].gid = gid;
    g.id_map->map[idx].nid = nid;
    g.n_ids_mapped++;
}

/*
 * Global routine to look up a mapping.  If found, return TRUE and fill
 * in the new ID value.  Otherwise, return false and return -1 in the new
 * ID.
 */
boolean
lookup_id_mapping(unsigned int gid, unsigned int *nidp)
{
    int i;
    struct bucket *curr;

    if (g.n_ids_mapped)
        for (curr = g.id_map; curr; curr = curr->next) {
            /* first bucket might not be totally full */
            if (curr == g.id_map) {
                i = g.n_ids_mapped % N_PER_BUCKET;
                if (i == 0)
                    i = N_PER_BUCKET;
            } else
                i = N_PER_BUCKET;

            while (--i >= 0)
                if (gid == curr->map[i].gid) {
                    *nidp = curr->map[i].nid;
                    return TRUE;
                }
        }

    return FALSE;
}

static void
reset_oattached_mids(boolean ghostly)
{
    struct obj *otmp;
    unsigned oldid, nid;

    for (otmp = fobj; otmp; otmp = otmp->nobj) {
        if (ghostly && has_omonst(otmp)) {
            struct monst *mtmp = OMONST(otmp);

            mtmp->m_id = 0;
            mtmp->mpeaceful = mtmp->mtame = 0; /* pet's owner died! */
        }
        if (ghostly && has_omid(otmp)) {
            oldid = OMID(otmp);
            if (lookup_id_mapping(oldid, &nid))
                OMID(otmp) = nid;
            else
                free_omid(otmp);
        }
    }
}

#ifdef SELECTSAVED
/* put up a menu listing each character from this player's saved games;
   returns 1: use g.plname[], 0: new game, -1: quit */
int
restore_menu(
    winid bannerwin) /* if not WIN_ERR, clear window and show copyright in menu */
{
    winid tmpwin;
    anything any;
    char **saved;
    menu_item *chosen_game = (menu_item *) 0;
    int k, clet, ch = 0; /* ch: 0 => new game */
    int clr = 0;

    *g.plname = '\0';
    saved = get_saved_games(); /* array of character names */
    if (saved && *saved) {
        tmpwin = create_nhwindow(NHW_MENU);
        start_menu(tmpwin, MENU_BEHAVE_STANDARD);
        any = cg.zeroany; /* no selection */
        if (bannerwin != WIN_ERR) {
            /* for tty; erase copyright notice and redo it in the menu */
            clear_nhwindow(bannerwin);
            /* COPYRIGHT_BANNER_[ABCD] */
            for (k = 1; k <= 4; ++k)
                add_menu(tmpwin, &nul_glyphinfo, &any, 0, 0, ATR_NONE,
                         clr, copyright_banner_line(k), MENU_ITEMFLAGS_NONE);
            add_menu(tmpwin, &nul_glyphinfo, &any, 0, 0, ATR_NONE, clr, "",
                     MENU_ITEMFLAGS_NONE);
        }
        add_menu(tmpwin, &nul_glyphinfo, &any, 0, 0, ATR_NONE,
                 clr, "Select one of your saved games", MENU_ITEMFLAGS_NONE);
        for (k = 0; saved[k]; ++k) {
            any.a_int = k + 1;
            add_menu(tmpwin, &nul_glyphinfo, &any, 0, 0,
                     ATR_NONE, clr, saved[k], MENU_ITEMFLAGS_NONE);
        }
        clet = (k <= 'n' - 'a') ? 'n' : 0; /* new game */
        any.a_int = -1;                    /* not >= 0 */
        add_menu(tmpwin, &nul_glyphinfo, &any, clet, 0, ATR_NONE,
                 clr, "Start a new character", MENU_ITEMFLAGS_NONE);
        clet = (k + 1 <= 'q' - 'a') ? 'q' : 0; /* quit */
        any.a_int = -2;
        add_menu(tmpwin, &nul_glyphinfo, &any, clet, 0, ATR_NONE,
                 clr, "Never mind (quit)", MENU_ITEMFLAGS_SELECTED);
        /* no prompt on end_menu, as we've done our own at the top */
        end_menu(tmpwin, (char *) 0);
        if (select_menu(tmpwin, PICK_ONE, &chosen_game) > 0) {
            ch = chosen_game->item.a_int;
            if (ch > 0)
                Strcpy(g.plname, saved[ch - 1]);
            else if (ch < 0)
                ++ch; /* -1 -> 0 (new game), -2 -> -1 (quit) */
            free((genericptr_t) chosen_game);
        } else {
            ch = -1; /* quit menu without making a selection => quit */
        }
        destroy_nhwindow(tmpwin);
        if (bannerwin != WIN_ERR) {
            /* for tty; clear the menu away and put subset of copyright back
             */
            clear_nhwindow(bannerwin);
            /* COPYRIGHT_BANNER_A, preceding "Who are you?" prompt */
            if (ch == 0)
                putstr(bannerwin, 0, copyright_banner_line(1));
        }
    }
    free_saved_games(saved);
    return (ch > 0) ? 1 : ch;
}
#endif /* SELECTSAVED */

int
validate(NHFILE* nhfp, const char *name)
{
    readLenType rlen = 0;
    struct savefile_info sfi;
    unsigned long utdflags = 0L;
    boolean verbose = name ? TRUE : FALSE, reslt = FALSE;

    if (nhfp->structlevel)
        utdflags |= UTD_CHECKSIZES;
    if (!(reslt = uptodate(nhfp, name, utdflags))) return 1;

    if ((nhfp->mode & WRITING) == 0) {
        if (nhfp->structlevel)
            rlen = (readLenType) read(nhfp->fd, (genericptr_t) &sfi, sizeof sfi);
    } else {
        if (nhfp->structlevel)
            rlen = (readLenType) read(nhfp->fd, (genericptr_t) &sfi, sizeof sfi);
        minit();		/* ZEROCOMP */
        if (rlen == 0) {
            if (verbose) {
                pline("File \"%s\" is empty during save file feature check?", name);
                wait_synch();
            }
            return -1;
        }
    }
    return 0;
}

/*restore.c*/