summaryrefslogtreecommitdiff
path: root/src/tool/grfio.c
blob: 2fa48a2a15cc74bdc019a394c91a73a11cb28e52 (plain) (blame)
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
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
// Copyright (c) Athena Dev Teams - Licensed under GNU GPL
// For more information, see LICENCE in the main folder

/*********************************************************************
 *
 *		Ragnarok Online Emulator : grfio.c -- grf file I/O Module
 *--------------------------------------------------------------------
 *		special need library : zlib
 *********************************************************************
 *	$Id: grfio.c,v 1.2 2004/09/29 17:31:49 kalaspuff Exp $
 *
 *	2002/12/18... the original edition
 *	2003/01/23 ... Code correction
 *	2003/02/01 ... An addition and decryption processing are improved for LocalFile and two or more GRF(s) check processing.
 *	2003/02/02 ... Even if there is no grf it does not stop -- as -- correction
 *	2003/02/02... grf reading specification can be added later -- as -- correction (grfio_add function addition)
 *	2003/02 / 03... at the time of grfio_resourcecheck processing the entry addition processing method -- correction
 *	2003/02/05... change of the processing in grfio_init
 *	2003/02/23... a local file check -- GRFIO_LOCAL -- switch (Defoe -- Function Off)
 * 2003/10/21 ... The data of alpha client was read.
 *	2003/11/10 ... Ready new grf format.
 *	2003/11/11 ... version check fix & bug fix
 * 2006/04/16 ... fixed crash grfio_find_file when file is not found.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <malloc.h>
#include <sys/stat.h>

#include "grfio.h"
#include "../common/mmo.h"
#include "../zlib/unzip.h"

#define CHUNK 16384

#ifdef __WIN32
	#include "../zlib/zlib.h"
	#include "../zlib/iowin32.h"
#else
	#ifndef __FREEBSD__
		#include <zlib.h>
	#endif
#endif

typedef	unsigned char	BYTE;
typedef	unsigned short	WORD;
typedef	unsigned long	DWORD;

static char data_dir[1024] = "";	// "../";

//----------------------------
//	file entry table struct
//----------------------------
typedef struct {
	int 	srclen;				// compressed size
	int		srclen_aligned;		//
	int		declen;				// original size
	int		srcpos;
	short	next;
	int	cycle;
	char	type;
	char	fn[128-4*5];		// file name
	char	*fnd;
	signed char	gentry;				// read grf file select
} FILELIST;
//gentry ... 0    : It acquires from a local file.
//             It acquires from the resource file of 1>=:gentry_table[gentry-1].
//             1<=: Check a local file.
//                    If it is, after re-setting to 0, it acquires from a local file.
//                    If there is nothing, mark reversal will be carried out, and it will re-set, and will acquire from a resource file as well as 1>=.

//Since char defines *FILELIST.gentry, the maximum which can be added by grfio_add becomes by 127 pieces.

#define	GENTRY_LIMIT	512
#define	FILELIST_LIMIT	1048576	// temporary maximum, and a theory top maximum are 2G.

static FILELIST *filelist		= NULL;
static int	filelist_entrys		= 0;
static int	filelist_maxentry	= 0;

static char **gentry_table		= NULL;
static int gentry_entrys		= 0;
static int gentry_maxentry		= 0;

//----------------------------
//	file list hash table
//----------------------------
static int filelist_hash[256];

//----------------------------
//	grf decode data table
//----------------------------
static unsigned char BitMaskTable[8] = {
	0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01
};

static char	BitSwapTable1[64] = {
	58, 50, 42, 34, 26, 18, 10,  2, 60, 52, 44, 36, 28, 20, 12,  4,
	62, 54, 46, 38, 30, 22, 14,  6, 64, 56, 48, 40, 32, 24, 16,  8,
	57, 49, 41, 33, 25, 17,  9,  1, 59, 51, 43, 35, 27, 19, 11,  3,
	61, 53, 45, 37, 29, 21, 13,  5, 63, 55, 47, 39, 31, 23, 15,  7
};
static char	BitSwapTable2[64] = {
	40,  8, 48, 16, 56, 24, 64, 32, 39,  7, 47, 15, 55, 23, 63, 31,
	38,  6, 46, 14, 54, 22, 62, 30, 37,  5, 45, 13, 53, 21, 61, 29,
	36,  4, 44, 12, 52, 20, 60, 28, 35,  3, 43, 11, 51, 19, 59, 27,
	34,  2, 42, 10, 50, 18, 58, 26, 33,  1, 41,  9, 49, 17, 57, 25
};
static char	BitSwapTable3[32] = {
	16,  7, 20, 21, 29, 12, 28, 17,  1, 15, 23, 26,  5, 18, 31, 10,
     2,  8, 24, 14, 32, 27,  3,  9, 19, 13, 30,  6, 22, 11,  4, 25
};

static unsigned char NibbleData[4][64]={
	{
		0xef, 0x03, 0x41, 0xfd, 0xd8, 0x74, 0x1e, 0x47,  0x26, 0xef, 0xfb, 0x22, 0xb3, 0xd8, 0x84, 0x1e,
		0x39, 0xac, 0xa7, 0x60, 0x62, 0xc1, 0xcd, 0xba,  0x5c, 0x96, 0x90, 0x59, 0x05, 0x3b, 0x7a, 0x85,
		0x40, 0xfd, 0x1e, 0xc8, 0xe7, 0x8a, 0x8b, 0x21,  0xda, 0x43, 0x64, 0x9f, 0x2d, 0x14, 0xb1, 0x72,
		0xf5, 0x5b, 0xc8, 0xb6, 0x9c, 0x37, 0x76, 0xec,  0x39, 0xa0, 0xa3, 0x05, 0x52, 0x6e, 0x0f, 0xd9,
	}, {
		0xa7, 0xdd, 0x0d, 0x78, 0x9e, 0x0b, 0xe3, 0x95,  0x60, 0x36, 0x36, 0x4f, 0xf9, 0x60, 0x5a, 0xa3,
		0x11, 0x24, 0xd2, 0x87, 0xc8, 0x52, 0x75, 0xec,  0xbb, 0xc1, 0x4c, 0xba, 0x24, 0xfe, 0x8f, 0x19,
		0xda, 0x13, 0x66, 0xaf, 0x49, 0xd0, 0x90, 0x06,  0x8c, 0x6a, 0xfb, 0x91, 0x37, 0x8d, 0x0d, 0x78,
		0xbf, 0x49, 0x11, 0xf4, 0x23, 0xe5, 0xce, 0x3b,  0x55, 0xbc, 0xa2, 0x57, 0xe8, 0x22, 0x74, 0xce,
	}, {
		0x2c, 0xea, 0xc1, 0xbf, 0x4a, 0x24, 0x1f, 0xc2,  0x79, 0x47, 0xa2, 0x7c, 0xb6, 0xd9, 0x68, 0x15,
		0x80, 0x56, 0x5d, 0x01, 0x33, 0xfd, 0xf4, 0xae,  0xde, 0x30, 0x07, 0x9b, 0xe5, 0x83, 0x9b, 0x68,
		0x49, 0xb4, 0x2e, 0x83, 0x1f, 0xc2, 0xb5, 0x7c,  0xa2, 0x19, 0xd8, 0xe5, 0x7c, 0x2f, 0x83, 0xda,
		0xf7, 0x6b, 0x90, 0xfe, 0xc4, 0x01, 0x5a, 0x97,  0x61, 0xa6, 0x3d, 0x40, 0x0b, 0x58, 0xe6, 0x3d,
	}, {
		0x4d, 0xd1, 0xb2, 0x0f, 0x28, 0xbd, 0xe4, 0x78,  0xf6, 0x4a, 0x0f, 0x93, 0x8b, 0x17, 0xd1, 0xa4,
		0x3a, 0xec, 0xc9, 0x35, 0x93, 0x56, 0x7e, 0xcb,  0x55, 0x20, 0xa0, 0xfe, 0x6c, 0x89, 0x17, 0x62,
		0x17, 0x62, 0x4b, 0xb1, 0xb4, 0xde, 0xd1, 0x87,  0xc9, 0x14, 0x3c, 0x4a, 0x7e, 0xa8, 0xe2, 0x7d,
		0xa0, 0x9f, 0xf6, 0x5c, 0x6a, 0x09, 0x8d, 0xf0,  0x0f, 0xe3, 0x53, 0x25, 0x95, 0x36, 0x28, 0xcb,
	}
};
/*-----------------
 *	long data get
 */
static unsigned int getlong(unsigned char *p)
{
	return   p[0]
		| p[1] << 0x08
		| p[2] << 0x10
		| p[3] << 0x18; // Shinomori
}

/*==========================================
 *	Grf data decode : Subs
 *------------------------------------------
 */
static void NibbleSwap(BYTE *Src, int len)
{
	for(;0<len;len--,Src++) {
		*Src = (*Src>>4) | (*Src<<4);
	}
}

static void BitConvert(BYTE *Src,char *BitSwapTable)
{
	int lop,prm;
	BYTE tmp[8];
	memset(tmp,0,8);
	for(lop=0;lop!=64;lop++) {
		prm = BitSwapTable[lop]-1;
		if (Src[(prm >> 3) & 7] & BitMaskTable[prm & 7]) {
			tmp[(lop >> 3) & 7] |= BitMaskTable[lop & 7];
		}
	}
	memcpy(Src,tmp,8);
}

static void BitConvert4(BYTE *Src)
{
	int lop,prm;
	BYTE tmp[8];
	tmp[0] = ((Src[7]<<5) | (Src[4]>>3)) & 0x3f;	// ..0 vutsr
	tmp[1] = ((Src[4]<<1) | (Src[5]>>7)) & 0x3f;	// ..srqpo n
	tmp[2] = ((Src[4]<<5) | (Src[5]>>3)) & 0x3f;	// ..o nmlkj
	tmp[3] = ((Src[5]<<1) | (Src[6]>>7)) & 0x3f;	// ..kjihg f
	tmp[4] = ((Src[5]<<5) | (Src[6]>>3)) & 0x3f;	// ..g fedcb
	tmp[5] = ((Src[6]<<1) | (Src[7]>>7)) & 0x3f;	// ..cba98 7
	tmp[6] = ((Src[6]<<5) | (Src[7]>>3)) & 0x3f;	// ..8 76543
	tmp[7] = ((Src[7]<<1) | (Src[4]>>7)) & 0x3f;	// ..43210 v

	for(lop=0;lop!=4;lop++) {
		tmp[lop] = (NibbleData[lop][tmp[lop*2]] & 0xf0)
		         | (NibbleData[lop][tmp[lop*2+1]] & 0x0f);
	}

	*(DWORD*)(tmp+4)=0;
	for(lop=0;lop!=32;lop++) {
		prm = BitSwapTable3[lop]-1;
		if (tmp[prm >> 3] & BitMaskTable[prm & 7]) {
			tmp[(lop >> 3) + 4] |= BitMaskTable[lop & 7];
		}
	}
	Src[0] ^= tmp[4];
	Src[1] ^= tmp[5];
	Src[2] ^= tmp[6];
	Src[3] ^= tmp[7];
}

static void decode_des_etc(BYTE *buf,int len,int type,int cycle)
{
	int lop,cnt=0;
	if(cycle<3) cycle=3;
	else if(cycle<5) cycle++;
	else if(cycle<7) cycle+=9;
	else cycle+=15;

	for(lop=0;lop*8<len;lop++,buf+=8) {
		if(lop<20 || (type==0 && lop%cycle==0)){ // des
			BitConvert(buf,BitSwapTable1);
			BitConvert4(buf);
			BitConvert(buf,BitSwapTable2);
		} else {
			if(cnt==7 && type==0){
				int a;
				BYTE tmp[8];
				*(DWORD*)tmp     = *(DWORD*)buf;
				*(DWORD*)(tmp+4) = *(DWORD*)(buf+4);
				cnt=0;
				buf[0]=tmp[3];
				buf[1]=tmp[4];
				buf[2]=tmp[6];
				buf[3]=tmp[0];
				buf[4]=tmp[1];
				buf[5]=tmp[2];
				buf[6]=tmp[5];
				a=tmp[7];
				if(a==0x00) a=0x2b;
				else if(a==0x2b) a=0x00;
				else if(a==0x01) a=0x68;
				else if(a==0x68) a=0x01;
				else if(a==0x48) a=0x77;
				else if(a==0x77) a=0x48;
				else if(a==0x60) a=0xff;
				else if(a==0xff) a=0x60;
				else if(a==0x6c) a=0x80;
				else if(a==0x80) a=0x6c;
				else if(a==0xb9) a=0xc0;
				else if(a==0xc0) a=0xb9;
				else if(a==0xeb) a=0xfe;
				else if(a==0xfe) a=0xeb;
				buf[7]=a;
			}
			cnt++;
		}
	}
}
/*==========================================
 *	Grf data decode sub : zip
 *------------------------------------------
 */
int decode_zip(unsigned char *dest, unsigned long* destLen, const unsigned char* source, unsigned long sourceLen)
{
	z_stream stream;
	int err;

	stream.next_in = (Bytef*)source;
	stream.avail_in = (uInt)sourceLen;
	/* Check for source > 64K on 16-bit machine: */
	if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;

	stream.next_out = (Bytef*) dest;
	stream.avail_out = (uInt)*destLen;
	if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;

	stream.zalloc = (alloc_func)0;
	stream.zfree = (free_func)0;

	err = inflateInit(&stream);
	if (err != Z_OK) return err;

	err = inflate(&stream, Z_FINISH);
	if (err != Z_STREAM_END) {
		inflateEnd(&stream);
		return err == Z_OK ? Z_BUF_ERROR : err;
	}
	*destLen = stream.total_out;

	err = inflateEnd(&stream);
	return err;
}

int encode_zip(unsigned char *dest, unsigned long* destLen, const unsigned char* source, unsigned long sourceLen) {
	z_stream stream;
	int err;
	memset(&stream, 0, sizeof(stream));
	stream.next_in = (Bytef*)source;
	stream.avail_in = (uInt)sourceLen;
	/* Check for source > 64K on 16-bit machine: */
	if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;

	stream.next_out = (Bytef*) dest;
	stream.avail_out = (uInt)*destLen;
	if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;

	stream.zalloc = (alloc_func)0;
	stream.zfree = (free_func)0;

	err = deflateInit(&stream,Z_DEFAULT_COMPRESSION);
	if (err != Z_OK) return err;

	err = deflate(&stream, Z_FINISH);
	if (err != Z_STREAM_END) {
		inflateEnd(&stream);
		return err == Z_OK ? Z_BUF_ERROR : err;
	}
	*destLen = stream.total_out;

	err = deflateEnd(&stream);
	return err;
}

/* ===================================
* Unzips a file. 1: success, 0: error
* Adapted from miniunz.c [Celest]
* Version 1.01b, May 30th, 2004
* Copyright (C) 1998-2004 Gilles Vollant
* -------------------------------------
*/
int deflate_file (const char *source, const char *filename)
{
#ifdef _WIN32
	zlib_filefunc_def ffunc;
#endif
	unzFile uf = NULL;
	int err = UNZ_OK;
	uInt size_buf = 8192;
	FILE *fout = NULL;
	void *buf;

#ifdef _WIN32
	fill_win32_filefunc(&ffunc);
	uf = unzOpen2(source, &ffunc);
#else
	uf = unzOpen(source);
#endif

	if (uf == NULL)
		return 0;

	if (unzLocateFile(uf, filename, 0) != UNZ_OK)
		return 0;

	err = unzOpenCurrentFilePassword(uf, NULL);

	fout = fopen(filename,"wb");
	if (fout == NULL)
		return 0;

	buf = (void *)malloc(size_buf);
	do {
		err = unzReadCurrentFile(uf, buf, size_buf);
		if (err < 0)
			break;
		if (err > 0 &&
			fwrite(buf, err, 1, fout)!=1)
		{
			err = UNZ_ERRNO;
			break;
		}
	} while (err > 0);
	
	if (fout) fclose(fout);

	if (err == UNZ_OK) {
		err = unzCloseCurrentFile (uf);
		free(buf);
		return (err == UNZ_OK);
	}
	
	unzCloseCurrentFile(uf); /* don't lose the error */

	return 0;
}

unsigned long grfio_crc32 (const unsigned char *buf, unsigned int len)
{
	return crc32(crc32(0L, Z_NULL, 0), buf, len);
}

/***********************************************************
 ***                File List Subroutines                ***
 ***********************************************************/

/*==========================================
 *	File List : Hash make
 *------------------------------------------
 */
static int filehash(unsigned char *fname)
{
	unsigned int hash=0;
	while(*fname) {
		hash = ((hash<<1)+(hash>>7)*9+tolower(*fname));
		fname++;
	}
	return hash & 255;
}

/*==========================================
 *	File List : Hash initalize
 *------------------------------------------
 */
static void hashinit(void)
{
	int lop;
	for (lop = 0; lop < 256; lop++)
		filelist_hash[lop] = -1;
}

/*==========================================
 *	File List : File find
 *------------------------------------------
 */
static FILELIST *filelist_find(char *fname)
{
	int hash;

	if (!filelist)
		return NULL;

	for (hash = filelist_hash[filehash((unsigned char *) fname)]; hash >= 0; hash = filelist[hash].next) {
		if(strcmpi(filelist[hash].fn, fname) == 0)
			break;
	}

	return (hash >= 0) ? &filelist[hash] : NULL;
}

char *grfio_find_file(char *fname){
	FILELIST *filelist = filelist_find(fname);
	if (!filelist) return NULL;
	return (!filelist->fnd?filelist->fn:filelist->fnd);
}

/*==========================================
 *	File List : Filelist add
 *------------------------------------------
 */
#define	FILELIST_ADDS	1024	// number increment of file lists `

static FILELIST* filelist_add(FILELIST *entry)
{
	int hash;

	if (filelist_entrys >= FILELIST_LIMIT) {
		printf("GRF filelist limit reached!\n");
		exit(1);
	}

	if (filelist_entrys >= filelist_maxentry) {
		filelist = (FILELIST *)realloc(filelist, (filelist_maxentry + FILELIST_ADDS) * sizeof(FILELIST));
		memset(filelist + filelist_maxentry, '\0', FILELIST_ADDS * sizeof(FILELIST));
		filelist_maxentry += FILELIST_ADDS;
	}

	memcpy (&filelist[filelist_entrys], entry, sizeof(FILELIST));

	hash = filehash((unsigned char *) entry->fn);
	filelist[filelist_entrys].next = filelist_hash[hash];
	filelist_hash[hash] = filelist_entrys;

	filelist_entrys++;

	return &filelist[filelist_entrys - 1];
}

static FILELIST* filelist_modify(FILELIST *entry)
{
	FILELIST *fentry;
	if ((fentry = filelist_find(entry->fn)) != NULL) {
		int tmp = fentry->next;
		memcpy(fentry, entry, sizeof(FILELIST));
		fentry->next = tmp;
	} else {
		fentry = filelist_add(entry);
	}
	return fentry;
}

/*==========================================
 *	File List : filelist size adjust
 *------------------------------------------
 */
static void filelist_adjust(void)
{
	if (filelist != NULL) {
		if (filelist_maxentry > filelist_entrys) {
			filelist = (FILELIST *)realloc(
				filelist, filelist_entrys * sizeof(FILELIST));
			filelist_maxentry = filelist_entrys;
		}
	}
}

/***********************************************************
 ***                  Grfio Sobroutines                  ***
 ***********************************************************/

/*==========================================
 *	Grfio : Resource file size get
 *------------------------------------------
 */
int grfio_size(char *fname)
{
	FILELIST *entry;

	entry = filelist_find(fname);

	if (entry == NULL || entry->gentry < 0) {	// LocalFileCheck
		char lfname[256], *p;
		FILELIST lentry;
		struct stat st;

		sprintf(lfname, "%s%s", data_dir, fname);

		for (p = &lfname[0]; *p != 0; p++)
			if (*p=='\\') *p = '/';	// * At the time of Unix

		if (stat(lfname, &st) == 0) {
			strncpy(lentry.fn, fname, sizeof(lentry.fn) - 1);
			lentry.fnd = NULL;
			lentry.declen = st.st_size;
			lentry.gentry = 0;	// 0:LocalFile
			entry = filelist_modify(&lentry);
		} else if (entry == NULL) {
			printf("%s not found (grfio_size)\n", fname);
			//exit(1);
			return -1;
		}
	}
	return entry->declen;
}

/*==========================================
 *	Grfio : Resource file read & size get
 *------------------------------------------
 */
void* grfio_reads(char *fname, int *size)
{
	FILE *in;
	FILELIST *entry;
	unsigned char *buf2 = NULL;

	entry = filelist_find(fname);

	if (entry == NULL || entry->gentry <= 0) {	// LocalFileCheck
		char lfname[256], *p;
		FILELIST lentry;

		sprintf(lfname, "%s%s", data_dir, fname);
		
		for (p = &lfname[0]; *p != 0; p++)
			if (*p == '\\') *p = '/';	// * At the time of Unix

		in = fopen(lfname, "rb");
		if (in != NULL) {
			if (entry != NULL && entry->gentry == 0) {
				lentry.declen = entry->declen;
			} else {
				fseek(in,0,2);	// SEEK_END
				lentry.declen = ftell(in);
			}
			fseek(in,0,0);	// SEEK_SET
			buf2 = (unsigned char *)malloc(lentry.declen + 1024);
			fread(buf2, 1, lentry.declen, in);
			fclose(in);
			strncpy(lentry.fn, fname, sizeof(lentry.fn) - 1);
			lentry.fnd = NULL;
			lentry.gentry = 0;	// 0:LocalFile
			entry = filelist_modify(&lentry);
		} else {
			if (entry != NULL && entry->gentry < 0) {
				entry->gentry = -entry->gentry;	// local file checked
			} else {
				printf("%s not found (grfio_reads - local file %s)\n", fname, lfname);
				return NULL;
			}
		}
	}
	if (entry != NULL && entry->gentry > 0) {	// Archive[GRF] File Read
		char *gfname = gentry_table[entry->gentry - 1];
		in = fopen(gfname, "rb");
		if(in != NULL) {
			unsigned char *buf = (unsigned char *)malloc(entry->srclen_aligned + 1024);
			fseek(in, entry->srcpos, 0);
			fread(buf, 1, entry->srclen_aligned, in);
			fclose(in);
			buf2 = (unsigned char *)malloc(entry->declen + 1024);
			if (entry->type == 1 || entry->type == 3 || entry->type == 5) {
				uLongf len;
				if (entry->cycle >= 0)
					decode_des_etc(buf, entry->srclen_aligned, entry->cycle == 0, entry->cycle);
				len = entry->declen;
				decode_zip(buf2, &len, buf, entry->srclen);
				if (len != entry->declen) {
					printf("decode_zip size mismatch err: %d != %d\n", (int)len, entry->declen);
					free(buf);
					free(buf2);
					return NULL;
				}
			} else {
				memcpy(buf2, buf, entry->declen);
			}
			free(buf);
		} else {
			printf("%s not found (grfio_reads - GRF file %s)\n", fname, gfname);
			return NULL;
		}
	}
	if (size != NULL && entry != NULL)
		*size = entry->declen;

	return buf2;
}

/*==========================================
 *	Resource filename decode
 *------------------------------------------
 */
static char * decode_filename(unsigned char *buf,int len)
{
	int lop;
	for(lop=0;lop<len;lop+=8) {
		NibbleSwap(&buf[lop],8);
		BitConvert(&buf[lop],BitSwapTable1);
		BitConvert4(&buf[lop]);
		BitConvert(&buf[lop],BitSwapTable2);
	}
	return (char*)buf;
}

/*==========================================
 * Grfio : Entry table read
 *------------------------------------------
 */
static int grfio_entryread(char *gfname,int gentry)
{
	FILE *fp;
	long grf_size,list_size;
	unsigned char grf_header[0x2e];
	int lop,entry,entrys,ofs,grf_version;
	char *fname;
	unsigned char *grf_filelist;

	fp = fopen(gfname, "rb");
	if (fp == NULL) {
		printf("GRF data file not found: '%s'.\n",gfname);
		return 1;	// 1:not found error
	}

	fseek(fp,0,2);	// SEEK_END
	grf_size = ftell(fp);
	fseek(fp,0,0);	// SEEK_SET
	fread(grf_header,1,0x2e,fp);
	if (strcmp((const char *) grf_header,"Master of Magic") ||
		fseek(fp,getlong(grf_header+0x1e),1))	// SEEK_CUR
	{
		fclose(fp);
		printf("GRF %s read error\n",gfname);
		return 2;	// 2:file format error
	}

	grf_version = getlong(grf_header+0x2a) >> 8;

	if (grf_version == 0x01) {	//****** Grf version 01xx ******
		list_size = grf_size - ftell(fp);
		grf_filelist = (unsigned char *) malloc(list_size);
		fread(grf_filelist,1,list_size,fp);
		fclose(fp);

		entrys = getlong(grf_header+0x26) - getlong(grf_header+0x22) - 7;

		// Get an entry
		for (entry = 0,ofs = 0; entry < entrys; entry++) {
			int ofs2, srclen, srccount, type;
			char *period_ptr;
			FILELIST aentry;

			ofs2 = ofs+getlong(grf_filelist+ofs)+4;
			type = grf_filelist[ofs2+12];
			if (type != 0) {	// Directory Index ... skip
				fname = decode_filename(grf_filelist+ofs+6, grf_filelist[ofs]-6);
				if (strlen(fname) > sizeof(aentry.fn) - 1) {
					printf("GRF file name %s is too long\n", fname);
					free(grf_filelist);
					exit(1);
				}
				srclen = 0;
				if ((period_ptr = strrchr(fname, '.')) != NULL) {
					for(lop = 0; lop < 4; lop++) {
						if (strcmpi(period_ptr, ".gnd\0.gat\0.act\0.str"+lop*5) == 0)
							break;
					}
					srclen = getlong(grf_filelist+ofs2) - getlong(grf_filelist+ofs2+8) - 715;
					if(lop == 4) {
						for(lop = 10, srccount = 1; srclen >= lop; lop = lop * 10, srccount++);
					} else {
						srccount = 0;
					}
				} else {
					srccount = 0;
				}

				aentry.srclen         = srclen;
				aentry.srclen_aligned = getlong(grf_filelist+ofs2+4)-37579;
				aentry.declen         = getlong(grf_filelist+ofs2+8);
				aentry.srcpos         = getlong(grf_filelist+ofs2+13)+0x2e;
				aentry.cycle          = srccount;
				aentry.type           = type;
				strncpy(aentry.fn, fname,sizeof(aentry.fn)-1);
				aentry.fnd			  = NULL;
#ifdef	GRFIO_LOCAL
				aentry.gentry         = -(gentry+1);	// As Flag for making it a negative number carrying out the first time LocalFileCheck
#else
				aentry.gentry         = gentry+1;		// With no first time LocalFileCheck
#endif
				filelist_modify(&aentry);
			}
			ofs = ofs2 + 17;
		}
		free(grf_filelist);

	} else if (grf_version == 0x02) {	//****** Grf version 02xx ******
		unsigned char eheader[8];
		unsigned char *rBuf;
		uLongf rSize, eSize;

		fread(eheader,1,8,fp);
		rSize = getlong(eheader);	// Read Size
		eSize = getlong(eheader+4);	// Extend Size

		if ((long)rSize > grf_size-ftell(fp)) { // Warning fix [Lance]
			fclose(fp);
			printf("Illegal data format: GRF compress entry size\n");
			return 4;
		}

		rBuf = (unsigned char *)malloc(rSize);	// Get a Read Size
		grf_filelist = (unsigned char *)malloc(eSize);	// Get a Extend Size
		fread(rBuf,1,rSize,fp);
		fclose(fp);
		decode_zip(grf_filelist, &eSize, rBuf, rSize);	// Decode function
		list_size = eSize;
		free(rBuf);

		entrys = getlong(grf_header+0x26) - 7;

		// Get an entry
		for(entry = 0, ofs = 0; entry < entrys; entry++){
			int ofs2, srclen, srccount, type;
			FILELIST aentry;

			fname = (char*)(grf_filelist+ofs);
			if (strlen(fname) > sizeof(aentry.fn)-1) {
				printf("GRF file name %s is too long\n", fname);
				free(grf_filelist);
				exit(1);
			}
			//ofs2 = ofs+strlen((char*)(grf_filelist+ofs))+1;
			ofs2 = ofs + strlen(fname)+1;
			type = grf_filelist[ofs2+12];
			if (type == 1 || type == 3 || type == 5) {
				srclen = getlong(grf_filelist+ofs2);
				if (grf_filelist[ofs2+12] == 3) {
					for (lop = 10, srccount = 1; srclen >= lop; lop = lop * 10, srccount++);
				} else if (grf_filelist[ofs2+12] == 5) {
					srccount = 0;
				} else {	// if (grf_filelist[ofs2+12]==1) {
					srccount = -1;
				}

				aentry.srclen         = srclen;
				aentry.srclen_aligned = getlong(grf_filelist+ofs2+4);
				aentry.declen         = getlong(grf_filelist+ofs2+8);
				aentry.srcpos         = getlong(grf_filelist+ofs2+13)+0x2e;
				aentry.cycle          = srccount;
				aentry.type           = type;
				strncpy(aentry.fn,fname,sizeof(aentry.fn)-1);
				aentry.fnd			  = NULL;
#ifdef	GRFIO_LOCAL
				aentry.gentry         = -(gentry+1);	// As Flag for making it a negative number carrying out the first time LocalFileCheck
#else
				aentry.gentry         = gentry+1;		// With no first time LocalFileCheck
#endif
				filelist_modify(&aentry);
			}
			ofs = ofs2 + 17;
		}
		free(grf_filelist);

	} else {	//****** Grf Other version ******
		fclose(fp);
		printf("GRF version %04x not supported\n",getlong(grf_header+0x2a));
		return 4;
	}

	filelist_adjust();	// Unnecessary area release of filelist

	return 0;	// 0:no error
}

/*==========================================
 * Grfio : Resource file check
 *------------------------------------------
 */
static void grfio_resourcecheck(void)
{
	char w1[256], w2[256], src[256], dst[256], restable[256], line[256];
	char *ptr, *buf;
	FILELIST *entry;
	int size, i = 0;
	FILE *fp;

	// read resnametable from data directory and return if successful
	sprintf(restable, "%sdata\\resnametable.txt", data_dir);
	for (ptr = &restable[0]; *ptr != 0; ptr++)
		if (*ptr == '\\') *ptr = '/';

	fp = fopen(restable,"rb");
	if (fp) {
		while (fgets(line, sizeof(line) - 1, fp)) {
			if (sscanf(line, "%[^#]#%[^#]#", w1, w2) == 2 &&
				// we only need the maps' GAT and RSW files
				(strstr(w2, ".gat") || strstr(w2, ".rsw")))
			{
				sprintf(src, "data\\%s", w1);
				sprintf(dst, "data\\%s", w2);
				entry = filelist_find(dst);
				// create new entries reusing the original's info
				if (entry != NULL) {
					FILELIST fentry;
					memcpy(&fentry, entry, sizeof(FILELIST));
					strncpy(fentry.fn, src, sizeof(fentry.fn) - 1);
					fentry.fnd = grfio_alloc_ptr(dst);
					filelist_modify(&fentry);
					i++;
				}
			}
		}
		fclose(fp);
		return;	// we're done here!
	}
	
	// read resnametable from loaded GRF's, only if it cannot be
	// loaded from the data directory
	buf = (char *)grfio_reads("data\\resnametable.txt", &size);
	if (buf) {
		buf[size] = 0;
		ptr = buf;

		while (ptr - buf < size) {
			if (sscanf(ptr, "%[^#]#%[^#]#", w1, w2) == 2 &&
				(strstr(w2, ".gat") || strstr(w2, ".rsw")))
			{
				sprintf(src, "data\\%s", w1);
				sprintf(dst, "data\\%s", w2);
				entry = filelist_find(dst);
				if (entry != NULL) {
					FILELIST fentry;
					memcpy(&fentry, entry, sizeof(FILELIST));
					strncpy(fentry.fn, src, sizeof(fentry.fn) - 1);
					fentry.fnd = grfio_alloc_ptr(dst);
					filelist_modify(&fentry);
					i++;
				}
			}
			ptr = strchr(ptr,'\n');	// Next line
			if (!ptr) break;
			ptr++;
		}
		free(buf);
		return;
	}

}

/*==========================================
 * Grfio : Resource add
 *------------------------------------------
 */
#define	GENTRY_ADDS	4	// The number increment of gentry_table entries

static int grfio_add(char *fname)
{
	grfio_alloc_ptr(fname);

	return grfio_entryread(fname, gentry_entrys - 1);
}

char *grfio_alloc_ptr(char *fname)
{
	int len;
	char *buf;

	if (gentry_entrys >= GENTRY_LIMIT) {
		printf("GRF file entry limit reached!\n");
		exit(1);
	}

	if (gentry_entrys >= gentry_maxentry) {
		gentry_maxentry += GENTRY_ADDS;
		gentry_table = (char**)realloc(gentry_table, gentry_maxentry * sizeof(char*));
		memset(gentry_table + (gentry_maxentry - GENTRY_ADDS), 0, sizeof(char*) * GENTRY_ADDS);
	}
	len = strlen( fname );
	buf = (char*)malloc(len + 1);
	strcpy(buf, fname);
	gentry_table[gentry_entrys++] = buf;

	return buf;
}

/*==========================================
 * Grfio : Finalize
 *------------------------------------------
 */
void grfio_final(void)
{
	if (filelist != NULL)
		free(filelist);

	filelist_entrys = filelist_maxentry = 0;

	if (gentry_table != NULL) {
		int lop;
		for (lop = 0; lop < gentry_entrys; lop++) {
			if (gentry_table[lop] != NULL)
				free(gentry_table[lop]);
		}
		free(gentry_table);
	}
	gentry_table = NULL;
	gentry_entrys = gentry_maxentry = 0;
}

/*==========================================
 * Grfio : Initialize
 *------------------------------------------
 */
void grfio_init(char *fname)
{
	FILE *data_conf;
	char line[1024], w1[1024], w2[1024];
	int grf_num = 0;

	hashinit();	// hash table initialization

	data_conf = fopen(fname, "r");
	// It will read, if there is grf-files.txt.
	if (data_conf) {
		while(fgets(line, sizeof(line) - 1, data_conf)) {
			if (line[0] == '/' && line[1] == '/')
				continue;
			if (sscanf(line, "%[^:]: %[^\r\n]", w1, w2) != 2)
				continue;
			// Entry table reading
			if(strcmp(w1, "grf") == 0)	// GRF file
				grf_num += (grfio_add(w2) == 0);
			else if(strcmp(w1,"data_dir") == 0)	// Data directory
				strcpy(data_dir, w2);
		}
		fclose(data_conf);
	} // end of reading grf-files.txt

	if (grf_num == 0) {
		printf("No GRF loaded, using default data directory\n");
	}

	// Unnecessary area release of filelist
	filelist_adjust();
	// Resource check
	grfio_resourcecheck();

	return;
}