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Source:NetHack 3.4.0/save.c

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Below is the full text to save.c from the source code of NetHack 3.4.0. To link to a particular line, write [[NetHack 3.4.0/save.c#line123]], for example.

Warning! This is the source code from an old release. For the latest release, see Source code

The NetHack General Public License applies to screenshots, source code and other content from NetHack.
1.    /*	SCCS Id: @(#)save.c	3.4	2002/01/19	*/
2.    /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
3.    /* NetHack may be freely redistributed.  See license for details. */
4.    
5.    #include "hack.h"
6.    #include "lev.h"
7.    
8.    #ifndef NO_SIGNAL
9.    #include <signal.h>
10.   #endif
11.   #if !defined(LSC) && !defined(O_WRONLY) && !defined(AZTEC_C)
12.   #include <fcntl.h>
13.   #endif
14.   
15.   #include "quest.h"
16.   
17.   #ifdef MFLOPPY
18.   long bytes_counted;
19.   static int count_only;
20.   #endif
21.   
22.   #ifdef MICRO
23.   int dotcnt, dotrow;	/* also used in restore */
24.   #endif
25.   
26.   #ifdef ZEROCOMP
27.   STATIC_DCL void FDECL(bputc, (int));
28.   #endif
29.   STATIC_DCL void FDECL(savelevchn, (int,int));
30.   STATIC_DCL void FDECL(savedamage, (int,int));
31.   STATIC_DCL void FDECL(saveobjchn, (int,struct obj *,int));
32.   STATIC_DCL void FDECL(savemonchn, (int,struct monst *,int));
33.   STATIC_DCL void FDECL(savetrapchn, (int,struct trap *,int));
34.   STATIC_DCL void FDECL(savegamestate, (int,int));
35.   #ifdef MFLOPPY
36.   STATIC_DCL void FDECL(savelev0, (int,XCHAR_P,int));
37.   STATIC_DCL boolean NDECL(swapout_oldest);
38.   STATIC_DCL void FDECL(copyfile, (char *,char *));
39.   #endif /* MFLOPPY */
40.   #ifdef GCC_WARN
41.   static long nulls[10];
42.   #else
43.   #define nulls nul
44.   #endif
45.   
46.   #if defined(UNIX) || defined(VMS) || defined(__EMX__) || defined(WIN32)
47.   #define HUP	if (!program_state.done_hup)
48.   #else
49.   #define HUP
50.   #endif
51.   
52.   /* need to preserve these during save to avoid accessing freed memory */
53.   static unsigned ustuck_id = 0, usteed_id = 0;
54.   
55.   int
56.   dosave()
57.   {
58.   	clear_nhwindow(WIN_MESSAGE);
59.   	if(yn("Really save?") == 'n') {
60.   		clear_nhwindow(WIN_MESSAGE);
61.   		if(multi > 0) nomul(0);
62.   	} else {
63.   		clear_nhwindow(WIN_MESSAGE);
64.   		pline("Saving...");
65.   #if defined(UNIX) || defined(VMS) || defined(__EMX__)
66.   		program_state.done_hup = 0;
67.   #endif
68.   		if(dosave0()) {
69.   			u.uhp = -1;		/* universal game's over indicator */
70.   			/* make sure they see the Saving message */
71.   			display_nhwindow(WIN_MESSAGE, TRUE);
72.   			exit_nhwindows("Be seeing you...");
73.   			terminate(EXIT_SUCCESS);
74.   		} else (void)doredraw();
75.   	}
76.   	return 0;
77.   }
78.   
79.   
80.   #if defined(UNIX) || defined(VMS) || defined (__EMX__) || defined(WIN32)
81.   /*ARGSUSED*/
82.   void
83.   hangup(sig_unused)  /* called as signal() handler, so sent at least one arg */
84.   int sig_unused;
85.   {
86.   # ifdef NOSAVEONHANGUP
87.   	(void) signal(SIGINT, SIG_IGN);
88.   	clearlocks();
89.   #  ifndef VMS
90.   	terminate(EXIT_FAILURE);
91.   #  endif
92.   # else	/* SAVEONHANGUP */
93.   	if (!program_state.done_hup++) {
94.   	    if (program_state.something_worth_saving)
95.   		(void) dosave0();
96.   #  ifdef VMS
97.   	    /* don't call exit when already within an exit handler;
98.   	       that would cancel any other pending user-mode handlers */
99.   	    if (!program_state.exiting)
100.  #  endif
101.  	    {
102.  		clearlocks();
103.  		terminate(EXIT_FAILURE);
104.  	    }
105.  	}
106.  # endif
107.  	return;
108.  }
109.  #endif
110.  
111.  /* returns 1 if save successful */
112.  int
113.  dosave0()
114.  {
115.  	const char *fq_save;
116.  	register int fd, ofd;
117.  	xchar ltmp;
118.  	d_level uz_save;
119.  
120.  	if (!SAVEF[0])
121.  		return 0;
122.  	fq_save = fqname(SAVEF, SAVEPREFIX, 1);	/* level files take 0 */
123.  
124.  #if defined(UNIX) || defined(VMS)
125.  	(void) signal(SIGHUP, SIG_IGN);
126.  #endif
127.  #ifndef NO_SIGNAL
128.  	(void) signal(SIGINT, SIG_IGN);
129.  #endif
130.  
131.  #if defined(MICRO) && defined(MFLOPPY)
132.  	if (!saveDiskPrompt(0)) return 0;
133.  #endif
134.  
135.  	HUP if (iflags.window_inited) {
136.  	    uncompress(fq_save);
137.  	    fd = open_savefile();
138.  	    if (fd > 0) {
139.  		(void) close(fd);
140.  		clear_nhwindow(WIN_MESSAGE);
141.  		There("seems to be an old save file.");
142.  		if (yn("Overwrite the old file?") == 'n') {
143.  		    compress(fq_save);
144.  		    return 0;
145.  		}
146.  	    }
147.  	}
148.  
149.  	HUP mark_synch();	/* flush any buffered screen output */
150.  
151.  	fd = create_savefile();
152.  
153.  	if(fd < 0) {
154.  		HUP pline("Cannot open save file.");
155.  		(void) delete_savefile();	/* ab@unido */
156.  		return(0);
157.  	}
158.  
159.  	vision_recalc(2);	/* shut down vision to prevent problems
160.  				   in the event of an impossible() call */
161.  	
162.  	/* undo date-dependent luck adjustments made at startup time */
163.  	if(flags.moonphase == FULL_MOON)	/* ut-sally!fletcher */
164.  		change_luck(-1);		/* and unido!ab */
165.  	if(flags.friday13)
166.  		change_luck(1);
167.  	if(iflags.window_inited)
168.  	    HUP clear_nhwindow(WIN_MESSAGE);
169.  
170.  #ifdef MICRO
171.  	dotcnt = 0;
172.  	dotrow = 2;
173.  	curs(WIN_MAP, 1, 1);
174.  	if (strncmpi("X11", windowprocs.name, 3))
175.  	  putstr(WIN_MAP, 0, "Saving:");
176.  #endif
177.  #ifdef MFLOPPY
178.  	/* make sure there is enough disk space */
179.  	if (iflags.checkspace) {
180.  	    long fds, needed;
181.  
182.  	    savelev(fd, ledger_no(&u.uz), COUNT_SAVE);
183.  	    savegamestate(fd, COUNT_SAVE);
184.  	    needed = bytes_counted;
185.  
186.  	    for (ltmp = 1; ltmp <= maxledgerno(); ltmp++)
187.  		if (ltmp != ledger_no(&u.uz) && level_info[ltmp].where)
188.  		    needed += level_info[ltmp].size + (sizeof ltmp);
189.  	    fds = freediskspace(fq_save);
190.  	    if (needed > fds) {
191.  		HUP {
192.  		    There("is insufficient space on SAVE disk.");
193.  		    pline("Require %ld bytes but only have %ld.", needed, fds);
194.  		}
195.  		flushout();
196.  		(void) close(fd);
197.  		(void) delete_savefile();
198.  		return 0;
199.  	    }
200.  
201.  	    co_false();
202.  	}
203.  #endif /* MFLOPPY */
204.  
205.  	store_version(fd);
206.  	ustuck_id = (u.ustuck ? u.ustuck->m_id : 0);
207.  #ifdef STEED
208.  	usteed_id = (u.usteed ? u.usteed->m_id : 0);
209.  #endif
210.  	savelev(fd, ledger_no(&u.uz), WRITE_SAVE | FREE_SAVE);
211.  	savegamestate(fd, WRITE_SAVE | FREE_SAVE);
212.  
213.  	/* While copying level files around, zero out u.uz to keep
214.  	 * parts of the restore code from completely initializing all
215.  	 * in-core data structures, since all we're doing is copying.
216.  	 * This also avoids at least one nasty core dump.
217.  	 */
218.  	uz_save = u.uz;
219.  	u.uz.dnum = u.uz.dlevel = 0;
220.  	/* these pointers are no longer valid, and at least u.usteed
221.  	 * may mislead place_monster() on other levels
222.  	 */
223.  	u.ustuck = (struct monst *)0;
224.  #ifdef STEED
225.  	u.usteed = (struct monst *)0;
226.  #endif
227.  
228.  	for(ltmp = (xchar)1; ltmp <= maxledgerno(); ltmp++) {
229.  		if (ltmp == ledger_no(&uz_save)) continue;
230.  		if (!(level_info[ltmp].flags & LFILE_EXISTS)) continue;
231.  #ifdef MICRO
232.  		curs(WIN_MAP, 1 + dotcnt++, dotrow);
233.  		if (dotcnt >= (COLNO - 1)) {
234.  			dotrow++;
235.  			dotcnt = 0;
236.  		}
237.  		if (strncmpi("X11", windowprocs.name, 3)){
238.  		  putstr(WIN_MAP, 0, ".");
239.  		}
240.  		mark_synch();
241.  #endif
242.  		ofd = open_levelfile(ltmp);
243.  		if (ofd < 0) {
244.  		    HUP pline("Cannot read level %d.", ltmp);
245.  		    (void) close(fd);
246.  		    (void) delete_savefile();
247.  		    HUP done(TRICKED);
248.  		    return(0);
249.  		}
250.  		minit();	/* ZEROCOMP */
251.  		getlev(ofd, hackpid, ltmp, FALSE);
252.  		(void) close(ofd);
253.  		bwrite(fd, (genericptr_t) &ltmp, sizeof ltmp); /* level number*/
254.  		savelev(fd, ltmp, WRITE_SAVE | FREE_SAVE);     /* actual level*/
255.  		delete_levelfile(ltmp);
256.  	}
257.  	bclose(fd);
258.  
259.  	u.uz = uz_save;
260.  
261.  	/* get rid of current level --jgm */
262.  	delete_levelfile(ledger_no(&u.uz));
263.  	delete_levelfile(0);
264.  	compress(fq_save);
265.  	return(1);
266.  }
267.  
268.  STATIC_OVL void
269.  savegamestate(fd, mode)
270.  register int fd, mode;
271.  {
272.  	int uid;
273.  
274.  #ifdef MFLOPPY
275.  	count_only = (mode & COUNT_SAVE);
276.  #endif
277.  	uid = getuid();
278.  	bwrite(fd, (genericptr_t) &uid, sizeof uid);
279.  	bwrite(fd, (genericptr_t) &flags, sizeof(struct flag));
280.  	bwrite(fd, (genericptr_t) &u, sizeof(struct you));
281.  
282.  	/* must come before migrating_objs and migrating_mons are freed */
283.  	save_timers(fd, mode, RANGE_GLOBAL);
284.  	save_light_sources(fd, mode, RANGE_GLOBAL);
285.  
286.  	saveobjchn(fd, invent, mode);
287.  	saveobjchn(fd, migrating_objs, mode);
288.  	savemonchn(fd, migrating_mons, mode);
289.  	if (release_data(mode)) {
290.  	    invent = 0;
291.  	    migrating_objs = 0;
292.  	    migrating_mons = 0;
293.  	}
294.  	bwrite(fd, (genericptr_t) mvitals, sizeof(mvitals));
295.  
296.  	save_dungeon(fd, (boolean)!!perform_bwrite(mode),
297.  			 (boolean)!!release_data(mode));
298.  	savelevchn(fd, mode);
299.  	bwrite(fd, (genericptr_t) &moves, sizeof moves);
300.  	bwrite(fd, (genericptr_t) &monstermoves, sizeof monstermoves);
301.  	bwrite(fd, (genericptr_t) &quest_status, sizeof(struct q_score));
302.  	bwrite(fd, (genericptr_t) spl_book,
303.  				sizeof(struct spell) * (MAXSPELL + 1));
304.  	save_artifacts(fd);
305.  	save_oracles(fd, mode);
306.  	if(ustuck_id)
307.  	    bwrite(fd, (genericptr_t) &ustuck_id, sizeof ustuck_id);
308.  #ifdef STEED
309.  	if(usteed_id)
310.  	    bwrite(fd, (genericptr_t) &usteed_id, sizeof usteed_id);
311.  #endif
312.  	bwrite(fd, (genericptr_t) pl_character, sizeof pl_character);
313.  	bwrite(fd, (genericptr_t) pl_fruit, sizeof pl_fruit);
314.  	bwrite(fd, (genericptr_t) &current_fruit, sizeof current_fruit);
315.  	savefruitchn(fd, mode);
316.  	savenames(fd, mode);
317.  	save_waterlevel(fd, mode);
318.  	bflush(fd);
319.  }
320.  
321.  #ifdef INSURANCE
322.  void
323.  savestateinlock()
324.  {
325.  	int fd, hpid;
326.  	static boolean havestate = TRUE;
327.  
328.  	/* When checkpointing is on, the full state needs to be written
329.  	 * on each checkpoint.  When checkpointing is off, only the pid
330.  	 * needs to be in the level.0 file, so it does not need to be
331.  	 * constantly rewritten.  When checkpointing is turned off during
332.  	 * a game, however, the file has to be rewritten once to truncate
333.  	 * it and avoid restoring from outdated information.
334.  	 *
335.  	 * Restricting havestate to this routine means that an additional
336.  	 * noop pid rewriting will take place on the first "checkpoint" after
337.  	 * the game is started or restored, if checkpointing is off.
338.  	 */
339.  	if (flags.ins_chkpt || havestate) {
340.  		/* save the rest of the current game state in the lock file,
341.  		 * following the original int pid, the current level number,
342.  		 * and the current savefile name, which should not be subject
343.  		 * to any internal compression schemes since they must be
344.  		 * readable by an external utility
345.  		 */
346.  		fd = open_levelfile(0);
347.  		if (fd < 0) {
348.  		    pline("Cannot open level 0.");
349.  		    pline("Probably someone removed it.");
350.  		    done(TRICKED);
351.  		    return;
352.  		}
353.  
354.  		(void) read(fd, (genericptr_t) &hpid, sizeof(hpid));
355.  		if (hackpid != hpid) {
356.  		    pline("Level 0 pid bad!");
357.  		    done(TRICKED);
358.  		}
359.  		(void) close(fd);
360.  
361.  		fd = create_levelfile(0);
362.  		if (fd < 0) {
363.  		    pline("Cannot rewrite level 0.");
364.  		    done(TRICKED);
365.  		    return;
366.  		}
367.  		(void) write(fd, (genericptr_t) &hackpid, sizeof(hackpid));
368.  		if (flags.ins_chkpt) {
369.  		    int currlev = ledger_no(&u.uz);
370.  
371.  		    (void) write(fd, (genericptr_t) &currlev, sizeof(currlev));
372.  		    save_savefile_name(fd);
373.  		    store_version(fd);
374.  		    ustuck_id = (u.ustuck ? u.ustuck->m_id : 0);
375.  #ifdef STEED
376.  		    usteed_id = (u.usteed ? u.usteed->m_id : 0);
377.  #endif
378.  		    savegamestate(fd, WRITE_SAVE);
379.  		}
380.  		bclose(fd);
381.  	}
382.  	havestate = flags.ins_chkpt;
383.  }
384.  #endif
385.  
386.  #ifdef MFLOPPY
387.  boolean
388.  savelev(fd, lev, mode)
389.  int fd;
390.  xchar lev;
391.  int mode;
392.  {
393.  	if (mode & COUNT_SAVE) {
394.  		bytes_counted = 0;
395.  		savelev0(fd, lev, COUNT_SAVE);
396.  		/* probably bytes_counted will be filled in again by an
397.  		 * immediately following WRITE_SAVE anyway, but we'll
398.  		 * leave it out of checkspace just in case */
399.  		if (iflags.checkspace) {
400.  			while (bytes_counted > freediskspace(levels))
401.  				if (!swapout_oldest())
402.  					return FALSE;
403.  		}
404.  	}
405.  	if (mode & (WRITE_SAVE | FREE_SAVE)) {
406.  		bytes_counted = 0;
407.  		savelev0(fd, lev, mode);
408.  	}
409.  	if (mode != FREE_SAVE) {
410.  		level_info[lev].where = ACTIVE;
411.  		level_info[lev].time = moves;
412.  		level_info[lev].size = bytes_counted;
413.  	}
414.  	return TRUE;
415.  }
416.  
417.  STATIC_OVL void
418.  savelev0(fd,lev,mode)
419.  #else
420.  void
421.  savelev(fd,lev,mode)
422.  #endif
423.  int fd;
424.  xchar lev;
425.  int mode;
426.  {
427.  #ifdef TOS
428.  	short tlev;
429.  #endif
430.  
431.  	/* if we're tearing down the current level without saving anything
432.  	   (which happens upon entrance to the endgame or after an aborted
433.  	   restore attempt) then we don't want to do any actual I/O */
434.  	if (mode == FREE_SAVE) goto skip_lots;
435.  	if (iflags.purge_monsters) {
436.  		/* purge any dead monsters (necessary if we're starting
437.  		 * a panic save rather than a normal one, or sometimes
438.  		 * when changing levels without taking time -- e.g.
439.  		 * create statue trap then immediately level teleport) */
440.  		dmonsfree();
441.  	}
442.  
443.  	if(fd < 0) panic("Save on bad file!");	/* impossible */
444.  #ifdef MFLOPPY
445.  	count_only = (mode & COUNT_SAVE);
446.  #endif
447.  	if (lev >= 0 && lev <= maxledgerno())
448.  	    level_info[lev].flags |= VISITED;
449.  	bwrite(fd,(genericptr_t) &hackpid,sizeof(hackpid));
450.  #ifdef TOS
451.  	tlev=lev; tlev &= 0x00ff;
452.  	bwrite(fd,(genericptr_t) &tlev,sizeof(tlev));
453.  #else
454.  	bwrite(fd,(genericptr_t) &lev,sizeof(lev));
455.  #endif
456.  #ifdef RLECOMP
457.  	{
458.  	    /* perform run-length encoding of rm structs */
459.  	    struct rm *prm, *rgrm;
460.  	    int x, y;
461.  	    uchar match;
462.  
463.  	    rgrm = &levl[0][0];		/* start matching at first rm */
464.  	    match = 0;
465.  
466.  	    for (y = 0; y < ROWNO; y++) {
467.  		for (x = 0; x < COLNO; x++) {
468.  		    prm = &levl[x][y];
469.  		    if (prm->glyph == rgrm->glyph
470.  			&& prm->typ == rgrm->typ
471.  			&& prm->seenv == rgrm->seenv
472.  			&& prm->horizontal == rgrm->horizontal
473.  			&& prm->flags == rgrm->flags
474.  			&& prm->lit == rgrm->lit
475.  			&& prm->waslit == rgrm->waslit
476.  			&& prm->roomno == rgrm->roomno
477.  			&& prm->edge == rgrm->edge) {
478.  			match++;
479.  			if (match > 254) {
480.  			    match = 254;	/* undo this match */
481.  			    goto writeout;
482.  			}
483.  		    } else {
484.  			/* the run has been broken,
485.  			 * write out run-length encoding */
486.  		    writeout:
487.  			bwrite(fd, (genericptr_t)&match, sizeof(uchar));
488.  			bwrite(fd, (genericptr_t)rgrm, sizeof(struct rm));
489.  			/* start encoding again. we have at least 1 rm
490.  			 * in the next run, viz. this one. */
491.  			match = 1;
492.  			rgrm = prm;
493.  		    }
494.  		}
495.  	    }
496.  	    if (match > 0) {
497.  		bwrite(fd, (genericptr_t)&match, sizeof(uchar));
498.  		bwrite(fd, (genericptr_t)rgrm, sizeof(struct rm));
499.  	    }
500.  	}
501.  #else
502.  	bwrite(fd,(genericptr_t) levl,sizeof(levl));
503.  #endif /* RLECOMP */
504.  
505.  	bwrite(fd,(genericptr_t) &monstermoves,sizeof(monstermoves));
506.  	bwrite(fd,(genericptr_t) &upstair,sizeof(stairway));
507.  	bwrite(fd,(genericptr_t) &dnstair,sizeof(stairway));
508.  	bwrite(fd,(genericptr_t) &upladder,sizeof(stairway));
509.  	bwrite(fd,(genericptr_t) &dnladder,sizeof(stairway));
510.  	bwrite(fd,(genericptr_t) &sstairs,sizeof(stairway));
511.  	bwrite(fd,(genericptr_t) &updest,sizeof(dest_area));
512.  	bwrite(fd,(genericptr_t) &dndest,sizeof(dest_area));
513.  	bwrite(fd,(genericptr_t) &level.flags,sizeof(level.flags));
514.  	bwrite(fd, (genericptr_t) doors, sizeof(doors));
515.  	save_rooms(fd);	/* no dynamic memory to reclaim */
516.  
517.  	/* from here on out, saving also involves allocated memory cleanup */
518.   skip_lots:
519.  	/* must be saved before mons, objs, and buried objs */
520.  	save_timers(fd, mode, RANGE_LEVEL);
521.  	save_light_sources(fd, mode, RANGE_LEVEL);
522.  
523.  	savemonchn(fd, fmon, mode);
524.  	save_worm(fd, mode);	/* save worm information */
525.  	savetrapchn(fd, ftrap, mode);
526.  	saveobjchn(fd, fobj, mode);
527.  	saveobjchn(fd, level.buriedobjlist, mode);
528.  	saveobjchn(fd, billobjs, mode);
529.  	if (release_data(mode)) {
530.  	    fmon = 0;
531.  	    ftrap = 0;
532.  	    fobj = 0;
533.  	    level.buriedobjlist = 0;
534.  	    billobjs = 0;
535.  	}
536.  	save_engravings(fd, mode);
537.  	savedamage(fd, mode);
538.  	save_regions(fd, mode);
539.  	if (mode != FREE_SAVE) bflush(fd);
540.  }
541.  
542.  #ifdef ZEROCOMP
543.  /* The runs of zero-run compression are flushed after the game state or a
544.   * level is written out.  This adds a couple bytes to a save file, where
545.   * the runs could be mashed together, but it allows gluing together game
546.   * state and level files to form a save file, and it means the flushing
547.   * does not need to be specifically called for every other time a level
548.   * file is written out.
549.   */
550.  
551.  #define RLESC '\0'    /* Leading character for run of LRESC's */
552.  #define flushoutrun(ln) (bputc(RLESC), bputc(ln), ln = -1)
553.  
554.  #ifndef ZEROCOMP_BUFSIZ
555.  # define ZEROCOMP_BUFSIZ BUFSZ
556.  #endif
557.  static NEARDATA unsigned char outbuf[ZEROCOMP_BUFSIZ];
558.  static NEARDATA unsigned short outbufp = 0;
559.  static NEARDATA short outrunlength = -1;
560.  static NEARDATA int bwritefd;
561.  static NEARDATA boolean compressing = FALSE;
562.  
563.  /*dbg()
564.  {
565.      HUP printf("outbufp %d outrunlength %d\n", outbufp,outrunlength);
566.  }*/
567.  
568.  STATIC_OVL void
569.  bputc(c)
570.  int c;
571.  {
572.  #ifdef MFLOPPY
573.      bytes_counted++;
574.      if (count_only)
575.        return;
576.  #endif
577.      if (outbufp >= sizeof outbuf) {
578.  	(void) write(bwritefd, outbuf, sizeof outbuf);
579.  	outbufp = 0;
580.      }
581.      outbuf[outbufp++] = (unsigned char)c;
582.  }
583.  
584.  /*ARGSUSED*/
585.  void
586.  bufon(fd)
587.  int fd;
588.  {
589.      compressing = TRUE;
590.      return;
591.  }
592.  
593.  /*ARGSUSED*/
594.  void
595.  bufoff(fd)
596.  int fd;
597.  {
598.      if (outbufp) {
599.  	outbufp = 0;
600.  	panic("closing file with buffered data still unwritten");
601.      }
602.      outrunlength = -1;
603.      compressing = FALSE;
604.      return;
605.  }
606.  
607.  void
608.  bflush(fd)  /* flush run and buffer */
609.  register int fd;
610.  {
611.      bwritefd = fd;
612.      if (outrunlength >= 0) {	/* flush run */
613.  	flushoutrun(outrunlength);
614.      }
615.  #ifdef MFLOPPY
616.      if (count_only) outbufp = 0;
617.  #endif
618.  
619.      if (outbufp) {
620.  	if (write(fd, outbuf, outbufp) != outbufp) {
621.  #if defined(UNIX) || defined(VMS) || defined(__EMX__)
622.  	    if (program_state.done_hup)
623.  		terminate(EXIT_FAILURE);
624.  	    else
625.  #endif
626.  		bclose(fd);	/* panic (outbufp != 0) */
627.  	}
628.  	outbufp = 0;
629.      }
630.  }
631.  
632.  void
633.  bwrite(fd, loc, num)
634.  int fd;
635.  genericptr_t loc;
636.  register unsigned num;
637.  {
638.      register unsigned char *bp = (unsigned char *)loc;
639.  
640.      if (!compressing) {
641.  #ifdef MFLOPPY
642.  	bytes_counted += num;
643.  	if (count_only) return;
644.  #endif
645.  	if ((unsigned) write(fd, loc, num) != num) {
646.  #if defined(UNIX) || defined(VMS) || defined(__EMX__)
647.  	    if (program_state.done_hup)
648.  		terminate(EXIT_FAILURE);
649.  	    else
650.  #endif
651.  		panic("cannot write %u bytes to file #%d", num, fd);
652.  	}
653.      } else {
654.  	bwritefd = fd;
655.  	for (; num; num--, bp++) {
656.  	    if (*bp == RLESC) {	/* One more char in run */
657.  		if (++outrunlength == 0xFF) {
658.  		    flushoutrun(outrunlength);
659.  		}
660.  	    } else {		/* end of run */
661.  		if (outrunlength >= 0) {	/* flush run */
662.  		    flushoutrun(outrunlength);
663.  		}
664.  		bputc(*bp);
665.  	    }
666.  	}
667.      }
668.  }
669.  
670.  void
671.  bclose(fd)
672.  int fd;
673.  {
674.      bufoff(fd);
675.      (void) close(fd);
676.      return;
677.  }
678.  
679.  #else /* ZEROCOMP */
680.  
681.  static int bw_fd = -1;
682.  static FILE *bw_FILE = 0;
683.  static boolean buffering = FALSE;
684.  
685.  void
686.  bufon(fd)
687.      int fd;
688.  {
689.  #ifdef UNIX
690.      if(bw_fd >= 0)
691.  	panic("double buffering unexpected");
692.      bw_fd = fd;
693.      if((bw_FILE = fdopen(fd, "w")) == 0)
694.  	panic("buffering of file %d failed", fd);
695.  #endif
696.      buffering = TRUE;
697.  }
698.  
699.  void
700.  bufoff(fd)
701.  int fd;
702.  {
703.      bflush(fd);
704.      buffering = FALSE;
705.  }
706.  
707.  void
708.  bflush(fd)
709.      int fd;
710.  {
711.  #ifdef UNIX
712.      if(fd == bw_fd) {
713.  	if(fflush(bw_FILE) == EOF)
714.  	    panic("flush of savefile failed!");
715.      }
716.  #endif
717.      return;
718.  }
719.  
720.  void
721.  bwrite(fd,loc,num)
722.  register int fd;
723.  register genericptr_t loc;
724.  register unsigned num;
725.  {
726.  	boolean failed;
727.  
728.  #ifdef MFLOPPY
729.  	bytes_counted += num;
730.  	if (count_only) return;
731.  #endif
732.  
733.  #ifdef UNIX
734.  	if (buffering) {
735.  	    if(fd != bw_fd)
736.  		panic("unbuffered write to fd %d (!= %d)", fd, bw_fd);
737.  
738.  	    failed = (fwrite(loc, (int)num, 1, bw_FILE) != 1);
739.  	} else
740.  #endif /* UNIX */
741.  	{
742.  /* lint wants the 3rd arg of write to be an int; lint -p an unsigned */
743.  #if defined(BSD) || defined(ULTRIX)
744.  	    failed = (write(fd, loc, (int)num) != (int)num);
745.  #else /* e.g. SYSV, __TURBOC__ */
746.  	    failed = (write(fd, loc, num) != num);
747.  #endif
748.  	}
749.  
750.  	if (failed) {
751.  #if defined(UNIX) || defined(VMS) || defined(__EMX__)
752.  	    if (program_state.done_hup)
753.  		terminate(EXIT_FAILURE);
754.  	    else
755.  #endif
756.  		panic("cannot write %u bytes to file #%d", num, fd);
757.  	}
758.  }
759.  
760.  void
761.  bclose(fd)
762.      int fd;
763.  {
764.      bufoff(fd);
765.  #ifdef UNIX
766.      if (fd == bw_fd) {
767.  	(void) fclose(bw_FILE);
768.  	bw_fd = -1;
769.  	bw_FILE = 0;
770.      } else
771.  #endif
772.  	(void) close(fd);
773.      return;
774.  }
775.  #endif /* ZEROCOMP */
776.  
777.  STATIC_OVL void
778.  savelevchn(fd, mode)
779.  register int fd, mode;
780.  {
781.  	s_level	*tmplev, *tmplev2;
782.  	int cnt = 0;
783.  
784.  	for (tmplev = sp_levchn; tmplev; tmplev = tmplev->next) cnt++;
785.  	if (perform_bwrite(mode))
786.  	    bwrite(fd, (genericptr_t) &cnt, sizeof(int));
787.  
788.  	for (tmplev = sp_levchn; tmplev; tmplev = tmplev2) {
789.  	    tmplev2 = tmplev->next;
790.  	    if (perform_bwrite(mode))
791.  		bwrite(fd, (genericptr_t) tmplev, sizeof(s_level));
792.  	    if (release_data(mode))
793.  		free((genericptr_t) tmplev);
794.  	}
795.  	if (release_data(mode))
796.  	    sp_levchn = 0;
797.  }
798.  
799.  STATIC_OVL void
800.  savedamage(fd, mode)
801.  register int fd, mode;
802.  {
803.  	register struct damage *damageptr, *tmp_dam;
804.  	unsigned int xl = 0;
805.  
806.  	damageptr = level.damagelist;
807.  	for (tmp_dam = damageptr; tmp_dam; tmp_dam = tmp_dam->next)
808.  	    xl++;
809.  	if (perform_bwrite(mode))
810.  	    bwrite(fd, (genericptr_t) &xl, sizeof(xl));
811.  
812.  	while (xl--) {
813.  	    if (perform_bwrite(mode))
814.  		bwrite(fd, (genericptr_t) damageptr, sizeof(*damageptr));
815.  	    tmp_dam = damageptr;
816.  	    damageptr = damageptr->next;
817.  	    if (release_data(mode))
818.  		free((genericptr_t)tmp_dam);
819.  	}
820.  	if (release_data(mode))
821.  	    level.damagelist = 0;
822.  }
823.  
824.  STATIC_OVL void
825.  saveobjchn(fd, otmp, mode)
826.  register int fd, mode;
827.  register struct obj *otmp;
828.  {
829.  	register struct obj *otmp2;
830.  	unsigned int xl;
831.  	int minusone = -1;
832.  
833.  	while(otmp) {
834.  	    otmp2 = otmp->nobj;
835.  	    if (perform_bwrite(mode)) {
836.  		xl = otmp->oxlth + otmp->onamelth;
837.  		bwrite(fd, (genericptr_t) &xl, sizeof(int));
838.  		bwrite(fd, (genericptr_t) otmp, xl + sizeof(struct obj));
839.  	    }
840.  	    if (Has_contents(otmp))
841.  		saveobjchn(fd,otmp->cobj,mode);
842.  	    if (release_data(mode)) {
843.  		if (otmp->oclass == FOOD_CLASS) food_disappears(otmp);
844.  		if (otmp->oclass == SPBOOK_CLASS) book_disappears(otmp);
845.  		otmp->where = OBJ_FREE;	/* set to free so dealloc will work */
846.  		otmp->timed = 0;	/* not timed any more */
847.  		otmp->lamplit = 0;	/* caller handled lights */
848.  		dealloc_obj(otmp);
849.  	    }
850.  	    otmp = otmp2;
851.  	}
852.  	if (perform_bwrite(mode))
853.  	    bwrite(fd, (genericptr_t) &minusone, sizeof(int));
854.  }
855.  
856.  STATIC_OVL void
857.  savemonchn(fd, mtmp, mode)
858.  register int fd, mode;
859.  register struct monst *mtmp;
860.  {
861.  	register struct monst *mtmp2;
862.  	unsigned int xl;
863.  	int minusone = -1;
864.  	struct permonst *monbegin = &mons[0];
865.  
866.  	if (perform_bwrite(mode))
867.  	    bwrite(fd, (genericptr_t) &monbegin, sizeof(monbegin));
868.  
869.  	while (mtmp) {
870.  	    mtmp2 = mtmp->nmon;
871.  	    if (perform_bwrite(mode)) {
872.  		xl = mtmp->mxlth + mtmp->mnamelth;
873.  		bwrite(fd, (genericptr_t) &xl, sizeof(int));
874.  		bwrite(fd, (genericptr_t) mtmp, xl + sizeof(struct monst));
875.  	    }
876.  	    if (mtmp->minvent)
877.  		saveobjchn(fd,mtmp->minvent,mode);
878.  	    if (release_data(mode))
879.  		dealloc_monst(mtmp);
880.  	    mtmp = mtmp2;
881.  	}
882.  	if (perform_bwrite(mode))
883.  	    bwrite(fd, (genericptr_t) &minusone, sizeof(int));
884.  }
885.  
886.  STATIC_OVL void
887.  savetrapchn(fd, trap, mode)
888.  register int fd, mode;
889.  register struct trap *trap;
890.  {
891.  	register struct trap *trap2;
892.  
893.  	while (trap) {
894.  	    trap2 = trap->ntrap;
895.  	    if (perform_bwrite(mode))
896.  		bwrite(fd, (genericptr_t) trap, sizeof(struct trap));
897.  	    if (release_data(mode))
898.  		dealloc_trap(trap);
899.  	    trap = trap2;
900.  	}
901.  	if (perform_bwrite(mode))
902.  	    bwrite(fd, (genericptr_t)nulls, sizeof(struct trap));
903.  }
904.  
905.  /* save all the fruit names and ID's; this is used only in saving whole games
906.   * (not levels) and in saving bones levels.  When saving a bones level,
907.   * we only want to save the fruits which exist on the bones level; the bones
908.   * level routine marks nonexistent fruits by making the fid negative.
909.   */
910.  void
911.  savefruitchn(fd, mode)
912.  register int fd, mode;
913.  {
914.  	register struct fruit *f2, *f1;
915.  
916.  	f1 = ffruit;
917.  	while (f1) {
918.  	    f2 = f1->nextf;
919.  	    if (f1->fid >= 0 && perform_bwrite(mode))
920.  		bwrite(fd, (genericptr_t) f1, sizeof(struct fruit));
921.  	    if (release_data(mode))
922.  		dealloc_fruit(f1);
923.  	    f1 = f2;
924.  	}
925.  	if (perform_bwrite(mode))
926.  	    bwrite(fd, (genericptr_t)nulls, sizeof(struct fruit));
927.  	if (release_data(mode))
928.  	    ffruit = 0;
929.  }
930.  
931.  /* also called by prscore(); this probably belongs in dungeon.c... */
932.  void
933.  free_dungeons()
934.  {
935.  #ifdef FREE_ALL_MEMORY
936.  	savelevchn(0, FREE_SAVE);
937.  	save_dungeon(0, FALSE, TRUE);
938.  #endif
939.  	return;
940.  }
941.  
942.  void
943.  freedynamicdata()
944.  {
945.  	unload_qtlist();
946.  	free_invbuf();	/* let_to_name (invent.c) */
947.  	free_youbuf();	/* You_buf,&c (pline.c) */
948.  	tmp_at(DISP_FREEMEM, 0);	/* temporary display effects */
949.  #ifdef FREE_ALL_MEMORY
950.  # define freeobjchn(X)	(saveobjchn(0, X, FREE_SAVE),  X = 0)
951.  # define freemonchn(X)	(savemonchn(0, X, FREE_SAVE),  X = 0)
952.  # define freetrapchn(X)	(savetrapchn(0, X, FREE_SAVE), X = 0)
953.  # define freefruitchn()	 savefruitchn(0, FREE_SAVE)
954.  # define freenames()	 savenames(0, FREE_SAVE)
955.  # define free_oracles()	save_oracles(0, FREE_SAVE)
956.  # define free_waterlevel() save_waterlevel(0, FREE_SAVE)
957.  # define free_worm()	 save_worm(0, FREE_SAVE)
958.  # define free_timers(R)	 save_timers(0, FREE_SAVE, R)
959.  # define free_light_sources(R) save_light_sources(0, FREE_SAVE, R);
960.  # define free_engravings() save_engravings(0, FREE_SAVE)
961.  # define freedamage()	 savedamage(0, FREE_SAVE)
962.  # define free_animals()	 mon_animal_list(FALSE)
963.  
964.  	/* move-specific data */
965.  	dmonsfree();		/* release dead monsters */
966.  
967.  	/* level-specific data */
968.  	free_timers(RANGE_LEVEL);
969.  	free_light_sources(RANGE_LEVEL);
970.  	freemonchn(fmon);
971.  	free_worm();		/* release worm segment information */
972.  	freetrapchn(ftrap);
973.  	freeobjchn(fobj);
974.  	freeobjchn(level.buriedobjlist);
975.  	freeobjchn(billobjs);
976.  	free_engravings();
977.  	freedamage();
978.  
979.  	/* game-state data */
980.  	free_timers(RANGE_GLOBAL);
981.  	free_light_sources(RANGE_GLOBAL);
982.  	freeobjchn(invent);
983.  	freeobjchn(migrating_objs);
984.  	freemonchn(migrating_mons);
985.  	freemonchn(mydogs);		/* ascension or dungeon escape */
986.       /* freelevchn();	[folded into free_dungeons()] */
987.  	free_animals();
988.  	free_oracles();
989.  	freefruitchn();
990.  	freenames();
991.  	free_waterlevel();
992.  	free_dungeons();
993.  
994.  	/* some pointers in iflags */
995.  	if (iflags.wc_font_map) free(iflags.wc_font_map);
996.  	if (iflags.wc_font_message) free(iflags.wc_font_message);
997.  	if (iflags.wc_font_text) free(iflags.wc_font_text);
998.  	if (iflags.wc_font_menu) free(iflags.wc_font_menu);
999.  	if (iflags.wc_font_status) free(iflags.wc_font_status);
1000. 	if (iflags.wc_tile_file) free(iflags.wc_tile_file);
1001. 
1002. #endif	/* FREE_ALL_MEMORY */
1003. 	return;
1004. }
1005. 
1006. #ifdef MFLOPPY
1007. boolean
1008. swapin_file(lev)
1009. int lev;
1010. {
1011. 	char to[PATHLEN], from[PATHLEN];
1012. 
1013. 	Sprintf(from, "%s%s", permbones, alllevels);
1014. 	Sprintf(to, "%s%s", levels, alllevels);
1015. 	set_levelfile_name(from, lev);
1016. 	set_levelfile_name(to, lev);
1017. 	if (iflags.checkspace) {
1018. 		while (level_info[lev].size > freediskspace(to))
1019. 			if (!swapout_oldest())
1020. 				return FALSE;
1021. 	}
1022. # ifdef WIZARD
1023. 	if (wizard) {
1024. 		pline("Swapping in `%s'", from);
1025. 		wait_synch();
1026. 	}
1027. # endif
1028. 	copyfile(from, to);
1029. 	(void) unlink(from);
1030. 	level_info[lev].where = ACTIVE;
1031. 	return TRUE;
1032. }
1033. 
1034. STATIC_OVL boolean
1035. swapout_oldest() {
1036. 	char to[PATHLEN], from[PATHLEN];
1037. 	int i, oldest;
1038. 	long oldtime;
1039. 
1040. 	if (!ramdisk)
1041. 		return FALSE;
1042. 	for (i = 1, oldtime = 0, oldest = 0; i <= maxledgerno(); i++)
1043. 		if (level_info[i].where == ACTIVE
1044. 		&& (!oldtime || level_info[i].time < oldtime)) {
1045. 			oldest = i;
1046. 			oldtime = level_info[i].time;
1047. 		}
1048. 	if (!oldest)
1049. 		return FALSE;
1050. 	Sprintf(from, "%s%s", levels, alllevels);
1051. 	Sprintf(to, "%s%s", permbones, alllevels);
1052. 	set_levelfile_name(from, oldest);
1053. 	set_levelfile_name(to, oldest);
1054. # ifdef WIZARD
1055. 	if (wizard) {
1056. 		pline("Swapping out `%s'.", from);
1057. 		wait_synch();
1058. 	}
1059. # endif
1060. 	copyfile(from, to);
1061. 	(void) unlink(from);
1062. 	level_info[oldest].where = SWAPPED;
1063. 	return TRUE;
1064. }
1065. 
1066. STATIC_OVL void
1067. copyfile(from, to)
1068. char *from, *to;
1069. {
1070. # ifdef TOS
1071. 
1072. 	if (_copyfile(from, to))
1073. 		panic("Can't copy %s to %s", from, to);
1074. # else
1075. 	char buf[BUFSIZ];	/* this is system interaction, therefore
1076. 				 * BUFSIZ instead of NetHack's BUFSZ */
1077. 	int nfrom, nto, fdfrom, fdto;
1078. 
1079. 	if ((fdfrom = open(from, O_RDONLY | O_BINARY, FCMASK)) < 0)
1080. 		panic("Can't copy from %s !?", from);
1081. 	if ((fdto = open(to, O_WRONLY | O_BINARY | O_CREAT | O_TRUNC, FCMASK)) < 0)
1082. 		panic("Can't copy to %s", to);
1083. 	do {
1084. 		nfrom = read(fdfrom, buf, BUFSIZ);
1085. 		nto = write(fdto, buf, nfrom);
1086. 		if (nto != nfrom)
1087. 			panic("Copyfile failed!");
1088. 	} while (nfrom == BUFSIZ);
1089. 	(void) close(fdfrom);
1090. 	(void) close(fdto);
1091. # endif /* TOS */
1092. }
1093. 
1094. void
1095. co_false()	    /* see comment in bones.c */
1096. {
1097.     count_only = FALSE;
1098.     return;
1099. }
1100. 
1101. #endif /* MFLOPPY */
1102. 
1103. /*save.c*/

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