aboutsummaryrefslogtreecommitdiff
path: root/backends/platform/ps2/savefile.cpp
blob: 9c7d446d83d49b06fa1d9223eefae79f852ba941 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
/* ScummVM - Scumm Interpreter
 * Copyright (C) 2005-2006 The ScummVM project
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *
 */

#include <tamtypes.h>
#include <kernel.h>
#include <sifrpc.h>
#include <loadfile.h>
#include <fileio.h>
#include <malloc.h>
#include <ucl/ucl.h>
#include <libmc.h>
#include "backends/platform/ps2/savefile.h"
#include "backends/platform/ps2/Gs2dScreen.h"
#include "backends/platform/ps2/systemps2.h"
#include "common/scummsys.h"

extern void *_gp;

#define UCL_MAGIC 0x314C4355

#define PORT 0
#define SLOT 0
// port 0, slot 0: memory card in first slot.

void sioprintf(const char *zFormat, ...);

class McAccess {
public:
	McAccess(int port, int slot);
	~McAccess(void);
	int open(const char *name, int mode);
	int close(int fd);
	int size(int fd);
	int read(int fd, void *buf, int size);
	int write(int fd, const void *buf, int size);
	int mkDir(const char *name);
	int getDir(const char *name, unsigned int mode, int max, void *dest);    
	int getInfo(int *type, int *free, int *format);
	int remove(const char *name);
private:
	int _sema;
	int _port, _slot;
};

McAccess::McAccess(int port, int slot) {
	_port = port;
	_slot = slot;
	ee_sema_t newSema;
	newSema.init_count = 1;
	newSema.max_count = 1;
	_sema = CreateSema(&newSema);

	assert(mcInit(MC_TYPE_MC) >= 0);
}

McAccess::~McAccess(void) {
	DeleteSema(_sema);
}

int McAccess::open(const char *name, int mode) {
	int res;
	WaitSema(_sema);
	mcOpen(_port, _slot, name, mode);
	mcSync(0, NULL, &res);
	SignalSema(_sema);
	return res;
}

int McAccess::close(int fd) {
	int res;
	WaitSema(_sema);
	mcClose(fd);
	mcSync(0, NULL, &res);
	SignalSema(_sema);
	return res;
}

int McAccess::size(int fd) {
	int res, size;
	WaitSema(_sema);
	mcSeek(fd, 0, SEEK_END);
	mcSync(0, NULL, &size);
	mcSeek(fd, 0, SEEK_SET);
	mcSync(0, NULL, &res);
	SignalSema(_sema);
	assert(res == 0);
	return size;
}

int McAccess::read(int fd, void *buf, int size) {
	int res;
	WaitSema(_sema);
	mcRead(fd, buf, size);
	mcSync(0, NULL, &res);
	SignalSema(_sema);
	return res;
}

int McAccess::write(int fd, const void *buf, int size) {
	int res;
	WaitSema(_sema);
	mcWrite(fd, buf, size);
	mcSync(0, NULL, &res);
	SignalSema(_sema);
	return res;
}

int McAccess::mkDir(const char *name) {
	int res;
	WaitSema(_sema);
	mcMkDir(_port, _slot, name);
	mcSync(0, NULL, &res);
	SignalSema(_sema);
	return res;
}

int McAccess::remove(const char *name) {
	int res;
	WaitSema(_sema);
	mcDelete(_port, _slot, name);
	mcSync(0, NULL, &res);
	SignalSema(_sema);
	return res;
}

int McAccess::getDir(const char *name, unsigned int mode, int max, void *dest) {
	int res;
	WaitSema(_sema);
	mcGetDir(_port, _slot, name, mode, max, (mcTable*)dest);
	mcSync(0, NULL, &res);
	SignalSema(_sema);
	return res;
}

int McAccess::getInfo(int *type, int *free, int *format) {
	int res;
	WaitSema(_sema);
	mcGetInfo(_port, _slot, type, free, format);
	mcSync(0, NULL, &res);
	SignalSema(_sema);
	return res;
}

class UclOutSaveFile : public Common::OutSaveFile {
public:
	UclOutSaveFile(const char *filename, OSystem_PS2 *system, Gs2dScreen *screen, McAccess *mc);
	virtual ~UclOutSaveFile(void);
	virtual uint32 write(const void *ptr, uint32 size);
	virtual void flush(void);
	virtual bool ioFailed(void) const;
	virtual void clearIOFailed(void);
private:
	OSystem_PS2 *_system;
	Gs2dScreen *_screen;
	McAccess *_mc;
	int _fd;
	uint8 *_buf;
	uint32 _bufSize, _bufPos;
	bool _ioFailed, _wasFlushed;
	char _fileName[128];
};

class UclInSaveFile : public Common::InSaveFile {
public:
	UclInSaveFile(const char *filename, Gs2dScreen *screen, McAccess *mc);
	virtual ~UclInSaveFile(void);
	virtual bool eos(void) const;
	virtual uint32 read(void *ptr, uint32 size);
	virtual bool ioFailed(void) const;
	virtual void clearIOFailed(void);
	virtual void skip(uint32 offset);

	virtual uint32 pos(void) const;
	virtual uint32 size(void) const;
	virtual void seek(int pos, int whence = SEEK_SET);
private:
	Gs2dScreen *_screen;
	McAccess *_mc;
	uint8 *_buf;
	uint32 _bufSize, _bufPos;
	bool _ioFailed;
};

class AutoSaveFile : public Common::OutSaveFile {
public:
	AutoSaveFile(Ps2SaveFileManager *saveMan, const char *filename);
	~AutoSaveFile(void);
	virtual uint32 write(const void *ptr, uint32 size);
	virtual void flush(void) {}
	virtual bool ioFailed(void) { return false; };
	virtual void clearIOFailed(void) {}
private:
	Ps2SaveFileManager *_saveMan;
	char _fileName[256];
	uint8 *_buf;
	uint32 _bufSize, _bufPos;
};

AutoSaveFile::AutoSaveFile(Ps2SaveFileManager *saveMan, const char *filename) {
	strcpy(_fileName, filename);
	_saveMan = saveMan;
	_bufSize = 65536;
	_buf = (uint8*)memalign(64, _bufSize);
	_bufPos = 0;
}

AutoSaveFile::~AutoSaveFile(void) {
	_saveMan->writeSaveNonblocking(_fileName, _buf, _bufPos);
	free(_buf);
}

uint32 AutoSaveFile::write(const void *ptr, uint32 size) {
	uint32 bytesFree = _bufSize - _bufPos;
	if (bytesFree < size) {
		uint32 allocBytes = (size > 32 * 1024) ? size : 32 * 1024;
		_bufSize += allocBytes;
		_buf = (uint8*)realloc(_buf, _bufSize);
		bytesFree = _bufSize - _bufPos;
	}
	memcpy(_buf + _bufPos, ptr, size);
	_bufPos += size;
	return size;
}

#define MAX_MC_ENTRIES	16

void runSaveThread(Ps2SaveFileManager *param);

Ps2SaveFileManager::Ps2SaveFileManager(OSystem_PS2 *system, Gs2dScreen *screen) {
	_system = system;
	_screen = screen;
	_mc = new McAccess(0, 0);

	_mcDirList = (mcTable*)memalign(64, MAX_MC_ENTRIES * sizeof(mcTable));
	_mcDirName[0] = '\0';
	_mcCheckTime = 0;
	_mcNeedsUpdate = true;

	for (int mcCheckCount = 0; mcCheckCount < 3; mcCheckCount++) {
		/* retry mcGetInfo 3 times. It slows down startup without mc considerably,
		   but cheap 3rd party memory cards apparently fail to get detected once in a while */

		int mcType, mcFree, mcFormat;
		int res = _mc->getInfo(&mcType, &mcFree, &mcFormat);

		if ((res == 0) || (res == -1)) { // mc okay
			_mcPresent = true;
			printf("MC okay, result = %d. Type %d, Free %d, Format %d\n", res, mcType, mcFree, mcFormat);
			checkMainDirectory();
			break;
		} else {
			_mcPresent = false;
			printf("MC failed, not present or not formatted, code %d\n", res);
		}
	}

	// create save thread
	ee_sema_t newSema;
	newSema.init_count = 0;
	newSema.max_count = 1;
	_autoSaveSignal = CreateSema(&newSema);
	_autoSaveBuf = NULL;
	_autoSaveSize = 0;
	_systemQuit = false;

	ee_thread_t saveThread, thisThread;
	ReferThreadStatus(GetThreadId(), &thisThread);

	saveThread.initial_priority = thisThread.current_priority + 1;
	saveThread.stack_size = 8 * 1024;
	_autoSaveStack = malloc(saveThread.stack_size);	
	saveThread.stack  = _autoSaveStack;
	saveThread.func   = (void *)runSaveThread;
	saveThread.gp_reg = &_gp;

	_autoSaveTid = CreateThread(&saveThread);
	assert(_autoSaveTid >= 0);
	StartThread(_autoSaveTid, this);
}

Ps2SaveFileManager::~Ps2SaveFileManager(void) {
}

void Ps2SaveFileManager::checkMainDirectory(void) {
	// verify that the main directory (scummvm config + icon) exists
	int ret, fd;
	_mcNeedsUpdate = true;
	ret = _mc->getDir("/ScummVM/*", 0, MAX_MC_ENTRIES, _mcDirList);
	printf("/ScummVM/* res = %d\n", ret);
	if (ret <= 0) { // assume directory doesn't exist
		printf("Dir doesn't exist\n");
		ret = _mc->mkDir("/ScummVM");
		if (ret >= 0) {
			fd = _mc->open("/ScummVM/scummvm.icn", O_WRONLY | O_CREAT);
			if (fd >= 0) {
				uint16 icoSize;
				uint16 *icoBuf = decompressIconData(&icoSize);
				ret = _mc->write(fd, icoBuf, icoSize * 2);
				_mc->close(fd);
				free(icoBuf);

				printf(".icn written\n");
				setupIcon("/ScummVM/icon.sys", "scummvm.icn", "ScummVM", "Configuration");
			} else
				printf("Can't create icon file: %d\n", fd);
		} else
			printf("can't create scummvm directory: %d\n", ret);
	}
}

void Ps2SaveFileManager::splitPath(const char *fileName, char *dir, char *name) {
	strcpy(dir, fileName);
	char *ext = strchr(dir, '.');
	if (ext) {
		*ext = '\0';
		ext++;
	}
	if (ext && *ext)
		sprintf(name, "%s.ucl", ext);
	else
		strcpy(name, "save.ucl");
}

bool Ps2SaveFileManager::mcReadyForDir(const char *dir) {
	if (_mcNeedsUpdate || ((_system->getMillis() - _mcCheckTime) > 2000) || !_mcPresent) {
		// check if memory card was exchanged/removed in the meantime
		int mcType, mcFree, mcFormat, mcResult;
		mcResult = _mc->getInfo(&mcType, &mcFree, &mcFormat);
		if (mcResult != 0) { // memory card was exchanged
			_mcNeedsUpdate = true;
			if (mcResult == -1) { // yes, it was exchanged
				checkMainDirectory(); // make sure ScummVM dir and icon are there
			} else { // no memorycard in slot or not formatted or something like that
				_mcPresent = false;
				printf("MC not found, error code %d\n", mcResult);
				return false;
			}
		}
		_mcPresent = true;
		_mcCheckTime = _system->getMillis();
	}
	if (_mcNeedsUpdate || strcmp(_mcDirName, dir)) {
		strcpy(_mcDirName, dir);
		char dirStr[256];
		sprintf(dirStr, "/ScummVM-%s/*", dir);
		_mcEntries = _mc->getDir(dirStr, 0, MAX_MC_ENTRIES, _mcDirList);
		_mcNeedsUpdate = false;
	}
	return (_mcEntries >= 0);
}

Common::InSaveFile *Ps2SaveFileManager::openForLoading(const char *filename) {
	_screen->wantAnim(true);

	char dir[256], name[256];
	splitPath(filename, dir, name);
	if (mcReadyForDir(dir)) {
		bool fileExists = false;
		for (int i = 0; i < _mcEntries; i++)
			if (strcmp(name, (char*)_mcDirList[i].name) == 0)
				fileExists = true;
		if (fileExists) {
			char fullName[256];
			sprintf(fullName, "/ScummVM-%s/%s", dir, name);
			UclInSaveFile *file = new UclInSaveFile(fullName, _screen, _mc);
			if (file) {
				if (!file->ioFailed())
					return file;
				else
					delete file;
			}
		} else
			printf("file %s (%s) doesn't exist\n", filename, name);
	}
	_screen->wantAnim(false);
	return NULL;
}

Common::OutSaveFile *Ps2SaveFileManager::openForSaving(const char *filename) {
	int res;
	char dir[256], name[256];

	_screen->wantAnim(true);
	splitPath(filename, dir, name);

	if (!mcReadyForDir(dir)) {
		if (_mcPresent) { // directory doesn't seem to exist yet
			char fullPath[256];
			sprintf(fullPath, "/ScummVM-%s", dir);
			res = _mc->mkDir(fullPath);

			char icoSysDest[256], saveDesc[256];
			sprintf(icoSysDest, "%s/icon.sys", fullPath);
			strcpy(saveDesc, dir);
			if ((saveDesc[0] >= 'a') && (saveDesc[0] <= 'z'))
				saveDesc[0] += 'A' - 'a';
			setupIcon(icoSysDest, "../ScummVM/scummvm.icn", saveDesc, "Savegames");
		}
	}

	if (_mcPresent) {
		char fullPath[256];
		sprintf(fullPath, "/ScummVM-%s/%s", dir, name);
		if (strstr(filename, ".s00") || strstr(filename, ".ASD") || strstr(filename, ".asd")) {
			// this is an autosave
			AutoSaveFile *file = new AutoSaveFile(this, fullPath);
			return file;
		} else {
			UclOutSaveFile *file = new UclOutSaveFile(fullPath, _system, _screen, _mc);
			if (!file->ioFailed()) {
				// we're creating a file, mc will have to be updated next time
				_mcNeedsUpdate = true;
				return file;
			} else
				delete file;
		}
	}

	_screen->wantAnim(false);
	return NULL;
}

void Ps2SaveFileManager::listSavefiles(const char *prefix, bool *marks, int num) {
	_screen->wantAnim(true);

	int mcType, mcFree, mcFormat, mcResult;
	mcResult = _mc->getInfo(&mcType, &mcFree, &mcFormat);

	memset(marks, false, num * sizeof(bool));

	if ((mcResult == 0) || (mcResult == -1)) {
		// there's a memory card in the slot.
		if (mcResult == -1)
			_mcNeedsUpdate = true;

		mcTable *mcEntries = (mcTable*)memalign(64, sizeof(mcTable) * MAX_MC_ENTRIES);

		char dirStr[256], ext[256], mcSearchStr[256];
		strcpy(dirStr, prefix);
		char *pos = strchr(dirStr, '.');
		if (pos) {
			strcpy(ext, pos + 1);
			*pos = '\0';
		} else
			ext[0] = '\0';
		sprintf(mcSearchStr, "/ScummVM-%s/%s*", dirStr, ext);

		int numEntries = _mc->getDir(mcSearchStr, 0, MAX_MC_ENTRIES, mcEntries);

		int searchLen = strlen(ext);
		for (int i = 0; i < numEntries; i++)
			if ((((char*)mcEntries[i].name)[0] != '.') && stricmp((char*)mcEntries[i].name, "icon.sys")) {
				char *stopCh;
				int destNum = (int)strtoul((char*)mcEntries[i].name + searchLen, &stopCh, 10);
				if ((!stopCh) || strcmp(stopCh, ".ucl"))
					printf("unexpected end %s in name %s, search %s\n", stopCh, (char*)mcEntries[i].name, prefix);
				if (destNum < num)
					marks[destNum] = true;
			}
		free(mcEntries);
	}
	_screen->wantAnim(false);
}

const char *Ps2SaveFileManager::getSavePath(void) const {
	return "mc0:";
}

bool Ps2SaveFileManager::setupIcon(const char *dest, const char *ico, const char *descr1, const char *descr2) {
	mcIcon icon_sys;
	memset(&icon_sys, 0, sizeof(mcIcon));
	memcpy(icon_sys.head, "PS2D", 4);
	char title[256];
	if (!stricmp("SAVEGAME", descr1)) { // these are broken sword 1 savegames
		sprintf(title, "BSword1\n%s", descr2);
		icon_sys.nlOffset = 8;
	} else {
		sprintf(title, "%s\n%s", descr1, descr2);
		icon_sys.nlOffset = strlen(descr1) + 1;
	}
	strcpy_sjis((short*)&(icon_sys.title), title);
	icon_sys.trans = 0x10;
	memcpy(icon_sys.bgCol, _bgcolor, sizeof(_bgcolor));
	memcpy(icon_sys.lightDir, _lightdir, sizeof(_lightdir));
	memcpy(icon_sys.lightCol, _lightcol, sizeof(_lightcol));
	memcpy(icon_sys.lightAmbient, _ambient, sizeof(_ambient));
	strcpy((char*)icon_sys.view, ico);
	strcpy((char*)icon_sys.copy, ico);
	strcpy((char*)icon_sys.del, ico);

	int fd, res;
	fd = _mc->open(dest, O_WRONLY | O_CREAT);
	if (fd >= 0) {
		res = _mc->write(fd, &icon_sys, sizeof(icon_sys));
		_mc->close(fd);
        return (res == sizeof(icon_sys));
	} else
		return false;
}

uint16 *Ps2SaveFileManager::decompressIconData(uint16 *size) {
	uint16 inPos = 1;
	uint16 *rleData = (uint16*)_rleIcoData;
	uint16 resSize = rleData[0];
	uint16 *resData = (uint16*)malloc(resSize * sizeof(uint16));
	uint16 outPos = 0;
	while (outPos < resSize) {
		uint16 len = rleData[inPos++];
		while (len--)
			resData[outPos++] = 0x7FFF;
		len = rleData[inPos++];
		while (len--)
			resData[outPos++] = rleData[inPos++];
	}
	*size = resSize;
	assert(outPos == resSize);
	return resData;
}

void runSaveThread(Ps2SaveFileManager *param) {
	param->saveThread();
}

void Ps2SaveFileManager::writeSaveNonblocking(char *name, void *buf, uint32 size) {
	if (buf && size && !_systemQuit) {
		strcpy(_autoSaveName, name);
		assert(!_autoSaveBuf);
		_autoSaveBuf = (uint8*)malloc(size);
		memcpy(_autoSaveBuf, buf, size);
		_autoSaveSize = size;
		SignalSema(_autoSaveSignal);
	}
}

void Ps2SaveFileManager::saveThread(void) {
	while (!_systemQuit) {
		WaitSema(_autoSaveSignal);
		if (_autoSaveBuf && _autoSaveSize) {
			UclOutSaveFile *outSave = new UclOutSaveFile(_autoSaveName, _system, _screen, _mc);
			if (!outSave->ioFailed()) {
				outSave->write(_autoSaveBuf, _autoSaveSize);
				outSave->flush();
			}
			if (outSave->ioFailed())
				_system->msgPrintf(5000, "Writing autosave to %s failed", _autoSaveName);
			delete outSave;
			free(_autoSaveBuf);
			_autoSaveBuf = NULL;
			_autoSaveSize = 0;
			_mcNeedsUpdate = true; // we've created a file, mc will have to be updated
			_screen->wantAnim(false);
		}
	}
	ExitThread();
}

void Ps2SaveFileManager::quit(void) {
	_systemQuit = true;
	ee_thread_t statSave, statThis;
	ReferThreadStatus(GetThreadId(), &statThis);
	ChangeThreadPriority(_autoSaveTid, statThis.current_priority - 1);

	do {	// wait until thread called ExitThread()
		SignalSema(_autoSaveSignal);
		ReferThreadStatus(_autoSaveTid, &statSave);
	} while (statSave.status != 0x10);

	DeleteThread(_autoSaveTid);
    free(_autoSaveStack);
}

UclInSaveFile::UclInSaveFile(const char *filename, Gs2dScreen *screen, McAccess *mc) {
	_screen = screen;
	_mc = mc;
	int fd = _mc->open(filename, O_RDONLY);
	_buf = NULL;
	_bufSize = _bufPos = 0;
	_ioFailed = false;

	if (fd >= 0) {
		int srcSize = _mc->size(fd);
		if (srcSize > 8) {
			int res;
			uint8 *tmpBuf = (uint8*)memalign(64, srcSize);
			res = _mc->read(fd, tmpBuf, srcSize);
			if ((res == srcSize) && (*(uint32*)tmpBuf == UCL_MAGIC)) {
				uint32 resLen = _bufSize = *(uint32*)(tmpBuf + 4);
				_buf = (uint8*)malloc(_bufSize + 2048);
				res = ucl_nrv2e_decompress_8(tmpBuf + 8, srcSize - 8, _buf, &resLen, NULL);
				if ((res < 0) || (resLen != _bufSize)) {
					printf("Unable to decompress file %s (%d -> %d) error code %d\n", filename, srcSize, _bufSize, res);
					free(_buf);
					_buf = NULL;
					_bufSize = 0;
				}
			}
			free(tmpBuf);
		}
		_mc->close(fd);
	}
	if (!_buf) {
		printf("Invalid savegame %s\n", filename);
		_ioFailed = true;
	}
}

UclInSaveFile::~UclInSaveFile(void) {
	if (_buf)
		free(_buf);
	_screen->wantAnim(false);
}

bool UclInSaveFile::ioFailed(void) const {
	return _ioFailed;
}

void UclInSaveFile::clearIOFailed(void) {
	_ioFailed = false;
}

bool UclInSaveFile::eos(void) const {
	return _bufPos == _bufSize;
}

uint32 UclInSaveFile::pos(void) const {
	return _bufPos;
}

uint32 UclInSaveFile::size(void) const {
	return _bufSize;
}

void UclInSaveFile::seek(int pos, int whence) {
	int destPos;
	switch (whence) {
		case SEEK_SET:
			destPos = pos;
			break;
		case SEEK_CUR:
			destPos = _bufPos + pos;
			break;
		case SEEK_END:
			destPos = _bufSize + pos;
			break;
		default:
			return;
	}
	if ((destPos >= 0) && (destPos <= (int)_bufSize))
		_bufPos = (uint32)destPos;
}

uint32 UclInSaveFile::read(void *ptr, uint32 size) {
	if (_buf) {
		uint32 bytesRemain = _bufSize - _bufPos;
		if (size > bytesRemain) {
			size = bytesRemain;
			_ioFailed = true;
		}
		memcpy(ptr, _buf + _bufPos, size);
		_bufPos += size;
		return size;
	} else {
		_ioFailed = true;
		return 0;
	}
}

void UclInSaveFile::skip(uint32 offset) {
	if (_buf) {
		if (_bufPos + offset <= _bufSize)
			_bufPos += offset;
		else
			_bufPos = _bufSize;
	}
}

UclOutSaveFile::UclOutSaveFile(const char *filename, OSystem_PS2 *system, Gs2dScreen *screen, McAccess *mc) {
	_screen = screen;
	_system = system;
	_mc = mc;
	_bufPos = 0;
	_fd = _mc->open(filename, O_WRONLY | O_CREAT);
	if (_fd >= 0) {
		_bufSize = 65536;
		_buf = (uint8*)malloc(_bufSize);
		_ioFailed = false;
		strcpy(_fileName, filename);
	} else {
		_ioFailed = true;
		_bufSize = 0;
		_buf = NULL;
	}
	_wasFlushed = false;
}

UclOutSaveFile::~UclOutSaveFile(void) {
	if (_buf) {
		if (_bufPos) {
			printf("Engine didn't call SaveFile::flush()\n");
			flush();
			if (ioFailed()) {
				// unable to save to memory card and it's too late to return an error code to the engine
				_system->msgPrintf(5000, "!WARNING!\nCan't write to memory card.\nGame was NOT saved.");
				printf("~UclOutSaveFile: Flush failed!\n");
			}
		}
		free(_buf);
	}
	if (_fd >= 0)
		_mc->close(_fd);
	_screen->wantAnim(false);
}

bool UclOutSaveFile::ioFailed(void) const {
	return _ioFailed;
}

void UclOutSaveFile::clearIOFailed(void) {
	_ioFailed = false;
}

void UclOutSaveFile::flush(void) {
	int res;

	if (_bufPos) {
		if (_wasFlushed) {
			// the engine flushed this file and afterwards wrote more data.
			// this is unsupported because it results in savefiles that consist
			// of two or more compressed segments.
			printf("Error: 2nd call to UclOutSaveFile::flush!\n");
			res = -1;
		} else {
			uint32 compSize = _bufPos * 2;
			uint8 *compBuf = (uint8*)memalign(64, compSize + 8);
			*(uint32*)(compBuf + 0) = UCL_MAGIC;
			*(uint32*)(compBuf + 4) = _bufPos; // uncompressed size
			res = ucl_nrv2e_99_compress(_buf, _bufPos, compBuf + 8, &compSize, NULL, 10, NULL, NULL);
			if (res >= 0) {
				res = _mc->write(_fd, compBuf, compSize + 8);
				if (res != (int)compSize + 8) {
					printf("flush: write failed, %d != %d\n", res, compSize + 8);
					res = -1;
				}
			} else
				printf("Unable to compress %d bytes of savedata, errorcode %d\n", _bufPos, res);
			free(compBuf);
			_bufPos = 0;
		}

		if (res < 0) {
			_ioFailed = true;
			printf("UclOutSaveFile::flush failed!\n");
			if (_fd >= 0) {
				// the file is broken; delete it
				_mc->close(_fd);
				res = _mc->remove(_fileName);
				if (res == 0)
					printf("File %s: remove ok\n", _fileName);
				else
					printf("File %s: remove error %d\n", _fileName, res);
				_fd = -1;
			}
		}
	}
}

uint32 UclOutSaveFile::write(const void *ptr, uint32 size) {
	assert(_bufPos <= _bufSize);
	uint32 bytesFree = _bufSize - _bufPos;
	if (bytesFree < size) {
		uint32 allocBytes = (size > 32 * 1024) ? size : 32 * 1024;
		_bufSize += allocBytes;
		_buf = (uint8*)realloc(_buf, _bufSize);
		bytesFree = _bufSize - _bufPos;
	}
	assert(bytesFree >= size);
	memcpy(_buf + _bufPos, ptr, size);
	_bufPos += size;
	return size;
}