summaryrefslogtreecommitdiff
path: root/tools/firmware-utils/src/mktitanimg.c
blob: cca4a0ebaece6b9d0aab173108465fc8abdee946 (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
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
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libgen.h>
#include "mktitanimg.h"


struct checksumrecord
{
		unsigned int magic;
        unsigned int    chksum;     /* The checksum for the complete header.
 Excepting the
                                           checksum block */
};
/***************************************************************************
 * void print_help(void)
 ***************************************************************************/
void print_help(void)
{
	static char* help_page[]=
	{
		"mknspimg version 1.0, Texas Instruments, 2004",
		"Syntax:",
		"        mknspimg -o outfile -i image1 image2 -a align1 align2 [-v] [-b] [-p prod_id] [-r rel_id] [-s rel_name] [-f flags]",
		"Example:",
		"        mknspimg -o nsp_image.bin -i kernel.bin files.img -a 0 4096",
		"This generates 'nsp_image.bin' from two input files aligning first to 0 and second to 4096 bytes."
	};

	int num_lines = sizeof(help_page)/sizeof(char*);
	int i;
	for(i=0; i < num_lines; i++) {
		printf("%s\n", help_page[i]);
	}
}

/***************************************************************************
 * void mknspimg_print_hdr(NSP_IMG_HDR* p_img_hdr)
 ***************************************************************************/
void mknspimg_print_hdr(struct nsp_img_hdr *hdr)
{
	struct nsp_img_hdr_chksum	*chksum;
	struct nsp_img_hdr_section_info	*sect_info;
	struct nsp_img_hdr_sections	*section;
	int i;

	printf("****************** NSP Image Summary ******************\n");
	printf("Magic:             0x%x\n",		hdr->head.magic);
	printf("Image Header Size: 0x%x bytes\n",	hdr->head.hdr_size);
	printf("Total Image Size:  %d bytes\n",		hdr->head.image_size);
	printf("Product ID:        0x%x\n",		hdr->head.prod_id);
	printf("Release ID:        0x%x\n",		hdr->head.rel_id);
	printf("Version ID:        0x%x\n",		hdr->head.version);

	printf("Offset Info:       0x%x\n",		hdr->head.info_offset);
	printf("Offset Sect info:  0x%x\n",		hdr->head.sect_info_offset);
	printf("Offset Sections:   0x%x\n",		hdr->sect_info.sections_offset);

	chksum=(struct nsp_img_hdr_chksum *)(hdr+hdr->head.chksum_offset);
	printf("Header Checksum:   0x%x\n",		chksum->hdr_chksum);

	printf("+++ Section Information +++\n");
	printf("# of sections:     %u\n", hdr->sect_info.num_sects);
	section=&(hdr->sections);
	for(i = 0; i < hdr->sect_info.num_sects; i++, section++) {
		printf("+++++ Section %d +++++\n", i);
		printf("Total size:  %u bytes\n",	section->total_size);
		printf("Raw Size:    %u bytes\n",	section->raw_size);
		printf("Offset:      0x%x\n",		section->offset);
		printf("Type:        0x%x\n",		section->type);
		printf("Name:        %s\n",		section->name);
	}
	printf("*******************************************************\n");
}

CMDLINE_CFG	cmd_line_cfg =
{
	{
		/*	MIN	MAX	FLAGS					OPTION	*/
		{	2,	2,	(CMDLINE_OPTFLAG_ALLOW | CMDLINE_OPTFLAG_MANDAT) },	/* '-a' align1 align2 */
		{	0,	0,	CMDLINE_OPTFLAG_ALLOW },		/* '-b' bootstrap */
		{	0,	0,	!CMDLINE_OPTFLAG_ALLOW },		/* '-c' */
		{	0,	0,	!CMDLINE_OPTFLAG_ALLOW },		/* '-d' */
		{	0,	0,	!CMDLINE_OPTFLAG_ALLOW },		/* '-e' */
		{	1,	1,	CMDLINE_OPTFLAG_ALLOW },		/* '-f' flags */
		{	0,	0,	!CMDLINE_OPTFLAG_ALLOW },		/* '-g' */
		{	1,	1,	CMDLINE_OPTFLAG_ALLOW },		/* '-h' */
		{	2,	2,	(CMDLINE_OPTFLAG_ALLOW | CMDLINE_OPTFLAG_MANDAT) },	/* '-i arg1 arg2 ' */
		{	0,	0,	!CMDLINE_OPTFLAG_ALLOW },		/* '-j' */
		{	0,	0,	!CMDLINE_OPTFLAG_ALLOW },		/* '-k' */
		{	0,	0,	!CMDLINE_OPTFLAG_ALLOW },		/* '-l' */
		{	0,	0,	!CMDLINE_OPTFLAG_ALLOW },		/* '-m' */
		{	0,	0,	!CMDLINE_OPTFLAG_ALLOW },		/* '-n' */
		{	1,	1,	(CMDLINE_OPTFLAG_ALLOW | CMDLINE_OPTFLAG_MANDAT) },	/* '-o arg' */
		{	1,	1,	CMDLINE_OPTFLAG_ALLOW },		/* '-p' PROD_ID */
		{	0,	0,	!CMDLINE_OPTFLAG_ALLOW },		/* '-q' */
		{	1,	1,	CMDLINE_OPTFLAG_ALLOW },		/* '-r' REL_ID */
		{	1,	1,	CMDLINE_OPTFLAG_ALLOW },		/* '-s' "Release XXX.XXX" */
		{	0,	0,	!CMDLINE_OPTFLAG_ALLOW },		/* '-t' */
		{	0,	0,	!CMDLINE_OPTFLAG_ALLOW },		/* '-u' */
		{	0,	0,	CMDLINE_OPTFLAG_ALLOW },		/* '-v' control VERBOSE/NON-VERBOSE mode */
		{	0,	0,	!CMDLINE_OPTFLAG_ALLOW },		/* '-w' */
		{	0,	0,	!CMDLINE_OPTFLAG_ALLOW },		/* '-x' */
		{	0,	0,	!CMDLINE_OPTFLAG_ALLOW },		/* '-y' */
		{	0,	0,	!CMDLINE_OPTFLAG_ALLOW }		/* '-z' */
	},
	{	0,		0,	!CMDLINE_OPTFLAG_ALLOW },		/* global arguments */
};

/***************************************************************************
 * int nsp_img_write(void* image, char* file, int padding)
 * Write out the image.
 ***************************************************************************/
int main(int argc, char* argv[], char* env[])
{
	FILE*	nsp_image	= NULL;
	int header_version=1;
	int	cmdline_err;
	char*	cmdline_error_msg;

	char*	filen_kernel;
	char*	filen_files;
	char*	filen_out;

	int	i,count;			/* loop variables */
	int	num_sects = 2;			/* We require exactly two image with -i option
							   (see CMDLINE_CFG structure above) */
	int	desc_count=0;
	int	total = 0;

	int	header_size=0;
	struct nsp_img_hdr_head		*img_hdr_head;	/* Start of image header */
	struct nsp_img_hdr_info *img_hdr_info;
	struct nsp_img_hdr_section_info *img_hdr_section_info ;
	struct nsp_img_hdr_sections	*img_hdr_sections, *section;	/* Section pointers */
	

	/* Configure the command line. */
	cmdline_configure(&cmd_line_cfg);

	/* Read and parse the command line. */
	cmdline_err = cmdline_read(argc, argv);

	/* Check for parsing errors. */
	if(cmdline_err != 0) {
		/* Get the parse error message */
		cmdline_error_msg = cmdline_error(cmdline_err);

		/* Print it out */
		printf("%s\n", cmdline_error_msg);

		/* Print our help too */
		print_help();
		return -1;
	}
	if(cmdline_getopt_count('h') > 0)
	{
		header_version=atoi(argv[cmdline_getarg(cmdline_getarg_list('h'),0)]);
	}
	/* Set up arguments */
	filen_kernel	= argv[cmdline_getarg(cmdline_getarg_list('i'),0)];
	filen_files	= argv[cmdline_getarg(cmdline_getarg_list('i'),1)];
	filen_out	= argv[cmdline_getarg(cmdline_getarg_list('o'),0)];
	/* Command line arguments have been parsed. Start doing our work. */

	/* Caculate the header size, and allocate the memory, and assign the sub pointers */
	header_size =	sizeof(struct nsp_img_hdr_head) +		/* This has a single section
								   desc block already */
				(header_version==1?0:4) + 
				sizeof(struct nsp_img_hdr_info) + 
				sizeof(struct nsp_img_hdr_section_info) + 
			sizeof(struct nsp_img_hdr_sections) * num_sects ;

	img_hdr_head = (struct nsp_img_hdr_head *)malloc(header_size);
	memset(img_hdr_head, 0x0, header_size);
	img_hdr_info = (struct nsp_img_hdr_info*)((char *)img_hdr_head + sizeof(struct nsp_img_hdr_head) + (header_version==1?0:4));
	img_hdr_section_info = (struct nsp_img_hdr_section_info*)((char *)img_hdr_info + sizeof(struct nsp_img_hdr_info));
	img_hdr_sections = (struct nsp_img_hdr_sections*)((char *)img_hdr_section_info + sizeof(struct nsp_img_hdr_section_info));
	section = img_hdr_sections;
	memset(img_hdr_head, 0xff, (void*)img_hdr_info - (void*)img_hdr_head);
	
	img_hdr_head->hdr_version = header_version;
	img_hdr_head->hdr_size = header_size;
	img_hdr_head->info_offset = (void*)img_hdr_info - (void*)img_hdr_head;
	img_hdr_head->sect_info_offset = (void*)img_hdr_section_info - (void*)img_hdr_head;
	
	img_hdr_section_info->num_sects = num_sects;
	img_hdr_section_info->sect_size = sizeof(struct nsp_img_hdr_sections);
	img_hdr_section_info->sections_offset = (void*)img_hdr_sections - (void*)img_hdr_head;
	
/*	chksum = (struct nsp_img_hdr_chksum *)
			((unsigned int)image_hdr + header_size - sizeof(struct nsp_img_hdr_chksum));*/

	/* Open the out file */
	nsp_image = fopen(filen_out,"wb+");
	if(nsp_image==NULL) {
		printf("ERROR: can't open %s for writing.\n", filen_out);
		return -1;
	}

	/* Skip image header. We'll come back to it after we've written out the images. */	
	fseek(nsp_image,header_size,SEEK_SET);
	total = ftell(nsp_image);
	total = header_size;
	printf("total=%x\n",total);
	{
		int align;
		int	padding;
		char * buf;
		align = (header_version==1?0x10000:0x4000);
		if(align==0) {
			/* The user indicated no padding */
			padding = 0;
		} else {
			/* Calculate number padding bytes */
			if((total %align) ==0)
				padding=0;
			else
				padding = align - (total % align);
		}
		if(padding>0)
		{
			buf=malloc(padding);
			memset(buf, 0xff, padding);
			if(fwrite((void*)buf,1,padding,nsp_image)!=padding) {
				printf("ERROR: can't write to %s.\n", filen_out);
				free(buf);
				return -1;
			}
			free(buf);
			
		}
		total+=padding;
		

	}
	/* Write out all specified images (with -i option) */
	for(i=0; i < num_sects; i++) {
		char*	file_name;		/* input file name */
		FILE*	filep;			/* input file pointer */
		int	padding;		/* number of padding bytes to prepend */
		int	align;			/* align factor from command line */
		int	result;			/* intermediate result */
		char * buf;

		/* Open the specified image for reading */
		file_name	= argv[cmdline_getarg(cmdline_getarg_list('i'),i)];
		filep		= fopen(file_name, "rb");
		if(filep==NULL) {
			printf("ERROR: can't open file %s for reading.\n", file_name);
			return -1;
		}
		section->flags = ~0x00;
		/* Determine file size */
		fseek(filep,0,SEEK_END);
		section->raw_size=ftell(filep);
		fseek(filep,0,SEEK_SET);
		cs_calc_sum(filep,(unsigned long *)&section->chksum,0);
		fseek(filep,0,SEEK_SET);

		/* Retrieve the alignment constant */
		/* Set image offset from the beginning of the out file */
		section->offset=total;// + padding;

		//total += padding;

		/* Copy the image file into nsp_image */
		count = section->raw_size;
		buf=malloc(count);
		result=fread(buf, 1, count, filep);
		fwrite(buf, 1, result, nsp_image);
		free(buf);
		
		/* HACK: This is a hack to get the names and types to the files.
			TODO: Fix this to be a real method */
		if(i==0){
			section->type=NSP_IMG_SECTION_TYPE_KERNEL;
			strncpy(section->name, "kernel", 16);
		} else if(i==1){
			section->type=NSP_IMG_SECTION_TYPE_FILESYSTEM_ROOT;
			strncpy(section->name, "root", 16);
		}

		/* Account for the total */
		align	=  strtoul(argv[cmdline_getarg(cmdline_getarg_list('a'),i)],NULL,0);
		if(i==0){
			if(align==0 || (((section->raw_size+ section->offset)%align)==0))
				padding=0;
			else
				padding = align - ((section->raw_size+ section->offset) % align);

				section->total_size=section->raw_size + padding;
		}
		else{
			#define EXTRA_BLOCK 0x10000
			unsigned int squash_padding;
			squash_padding = EXTRA_BLOCK - section->raw_size % EXTRA_BLOCK;
			buf=malloc(EXTRA_BLOCK + 4);
			memset(buf, 0, squash_padding);
			fwrite(buf, 1, squash_padding, nsp_image);
			memset(buf, 0, EXTRA_BLOCK + 4);
			*((unsigned int *)buf)=0xdec0adde;
			*((unsigned int *)(buf+EXTRA_BLOCK))=0xdec0adde;
			fwrite(buf, 1, EXTRA_BLOCK+4, nsp_image);
			free(buf);
			
			if(align==0 || (((section->raw_size + (EXTRA_BLOCK + 4 + squash_padding)) %align)==0))
				padding=0;
			else
				padding = align - ((section->raw_size + (EXTRA_BLOCK + 4 + squash_padding)) % align);
			section->total_size=section->raw_size + (EXTRA_BLOCK + 4 + squash_padding) + padding;
		}
		if(padding>0){
			buf=malloc(padding);
			memset(buf, 0xff, padding);
			fwrite(buf, 1, padding, nsp_image);
			free(buf);
		}
		printf("*****padding is %d\ttotal_size=%d\traw_size=%d\n",padding, section->total_size, section->raw_size);

		//total += section->raw_size;
		total = section->total_size + section->offset;
		printf("total=0x%x\n",total);
		/* Close the input file */
		fclose(filep);

		/* Move the section pointer to the next slot */
		section++;
	}

	/* Take care of the NSP image header fields */

	/* head fields */
	img_hdr_head->magic		= NSP_IMG_MAGIC_NUMBER;
	img_hdr_head->boot_offset	= img_hdr_sections->offset;
	img_hdr_head->flags		= ~0x00;			/* Set to all 1's */

	if(cmdline_getopt_count('b'))
		img_hdr_head->flags	&= ~(NSP_IMG_FLAG_FAILBACK_5 | NSP_IMG_FLAG_FAILBACK_1);

	if(cmdline_getopt_count('f'))
		img_hdr_head->flags	= strtoul(argv[cmdline_getarg(cmdline_getarg_list('f'),0)], 0, 16);

#if 0
	img_hdr_head->hdr_version	= 2;
	img_hdr_head->hdr_size	= header_size;
#endif

	if(cmdline_getopt_count('p'))
		img_hdr_head->prod_id		= strtoul(argv[cmdline_getarg(cmdline_getarg_list('p'),0)], 0, 16);
	else
		img_hdr_head->prod_id		= 0x4C575943;

	if(cmdline_getopt_count('r'))
		img_hdr_head->rel_id		= strtoul(argv[cmdline_getarg(cmdline_getarg_list('r'),0)], 0, 0);
	else
		img_hdr_head->rel_id		= 0x10203040;

	if(cmdline_getopt_count('s'))
		img_hdr_head->version		= strtoul(argv[cmdline_getarg(cmdline_getarg_list('s'),0)], 0, 0);
	else
		img_hdr_head->version		= 0x0b040000;
	img_hdr_head->image_size	= total;
#if 0
	img_hdr_head->info_offset	= (unsigned int)(&(image_hdr->info)) -
						(unsigned int)image_hdr;
	img_hdr_head->sect_info_offset= (unsigned int)(&(image_hdr->sect_info)) -
						(unsigned int)image_hdr;
#endif
//	image_hdr->head.chksum_offset	= (unsigned int)chksum - (unsigned int)image_hdr;
	img_hdr_head->chksum_offset = 0xffffffff;
//	image_hdr->head.pad1 = 0xffffffff;
	/* info fields */
	/* TODO: Fix. Do nothing yet */
//	strncpy(nsp_img_hdr.id.prod_info,NSP_PRODINFO_STRING,sizeof(NSP_PRODINFO_STRING));
	strcpy(img_hdr_info->image_filename, (const char *)basename(filen_out));
	/* section fields */
#if 0
	img_hdr_section_info->num_sects=		num_sects;
	img_hdr_section_info->sect_size=		sizeof(struct nsp_img_hdr_sections);
	img_hdr_section_info->sections_offset=	(unsigned int)(&(image_hdr->sections)) -
						(unsigned int)image_hdr;
#endif

	/* Calculate checksum(s) */
#if 0
	chksum->hdr_chksum = cs_calc_buf_sum((char*)image_hdr,
			header_size - sizeof(struct nsp_img_hdr_chksum));
#endif
	/* Write out the NSP header. */
	fseek(nsp_image,0,SEEK_SET);
	count = fwrite((void*)img_hdr_head, header_size, 1, nsp_image);
	if(count!=1) {
		printf("ERROR: can't write to %s.\n", filen_out);
		return -1;
	}

	/* Check if -v option was specified (no arg needed) */
	if(cmdline_getopt_count('v') > 0)
	{
		struct nsp_img_hdr_head	head;
		struct nsp_img_hdr	*hdr;

		/* Rewind the file back to the beginning */
		fseek(nsp_image,0,SEEK_SET);

		/* Read header from the file */
		fread((void*)&head, sizeof(struct nsp_img_hdr_head),
				1, nsp_image);

		/* Get memory to store the complete header */
		hdr = (struct nsp_img_hdr *)malloc(head.hdr_size);

		/* Read header from the file */
		fseek(nsp_image,0,SEEK_SET);
		fread((void*)hdr, head.hdr_size, 1, nsp_image);

		/* Print it out */
		mknspimg_print_hdr(hdr);
		printf("Generated total %d bytes\n",total);
		free(hdr);
	}

	free(img_hdr_head);

      {
	  struct checksumrecord cr;
      cr.magic=CKSUM_MAGIC_NUMBER;
      cs_calc_sum(nsp_image, (unsigned long *)&cr.chksum, 0);
      fseek(nsp_image,0, SEEK_END);
      fwrite(&cr, 1, sizeof(cr), nsp_image);
	  }
	  {
		FILE * non_web;
		char fname[256];
		char * img_buf;
		unsigned int len;
		strcpy(fname, filen_out);
		strcat(fname, ".non_web");
		non_web = fopen(fname,"wb+");
		fseek(nsp_image, 0, SEEK_END);
		len = ftell(nsp_image);
		img_buf=malloc(len);
		fseek(nsp_image, 0, SEEK_SET);
		fread(img_buf, 1, len, nsp_image);
		img_buf[0xb] = 0x17;
		fwrite(img_buf, 1, len-sizeof(struct checksumrecord), non_web);
		fclose(non_web);
		free(img_buf);
	  }
	  /* Close NSP image file */
	fclose(nsp_image);

	/* return result */
	return(0);
}

#ifdef DMALLOC
#include <dmalloc.h>
#endif /* DMALLOC */

#define BUFLEN (1 << 16)

static unsigned long crctab[256] =
{
	0x0,
	0x04C11DB7, 0x09823B6E, 0x0D4326D9, 0x130476DC, 0x17C56B6B,
	0x1A864DB2, 0x1E475005, 0x2608EDB8, 0x22C9F00F, 0x2F8AD6D6,
	0x2B4BCB61, 0x350C9B64, 0x31CD86D3, 0x3C8EA00A, 0x384FBDBD,
	0x4C11DB70, 0x48D0C6C7, 0x4593E01E, 0x4152FDA9, 0x5F15ADAC,
	0x5BD4B01B, 0x569796C2, 0x52568B75, 0x6A1936C8, 0x6ED82B7F,
	0x639B0DA6, 0x675A1011, 0x791D4014, 0x7DDC5DA3, 0x709F7B7A,
	0x745E66CD, 0x9823B6E0, 0x9CE2AB57, 0x91A18D8E, 0x95609039,
	0x8B27C03C, 0x8FE6DD8B, 0x82A5FB52, 0x8664E6E5, 0xBE2B5B58,
	0xBAEA46EF, 0xB7A96036, 0xB3687D81, 0xAD2F2D84, 0xA9EE3033,
	0xA4AD16EA, 0xA06C0B5D, 0xD4326D90, 0xD0F37027, 0xDDB056FE,
	0xD9714B49, 0xC7361B4C, 0xC3F706FB, 0xCEB42022, 0xCA753D95,
	0xF23A8028, 0xF6FB9D9F, 0xFBB8BB46, 0xFF79A6F1, 0xE13EF6F4,
	0xE5FFEB43, 0xE8BCCD9A, 0xEC7DD02D, 0x34867077, 0x30476DC0,
	0x3D044B19, 0x39C556AE, 0x278206AB, 0x23431B1C, 0x2E003DC5,
	0x2AC12072, 0x128E9DCF, 0x164F8078, 0x1B0CA6A1, 0x1FCDBB16,
	0x018AEB13, 0x054BF6A4, 0x0808D07D, 0x0CC9CDCA, 0x7897AB07,
	0x7C56B6B0, 0x71159069, 0x75D48DDE, 0x6B93DDDB, 0x6F52C06C,
	0x6211E6B5, 0x66D0FB02, 0x5E9F46BF, 0x5A5E5B08, 0x571D7DD1,
	0x53DC6066, 0x4D9B3063, 0x495A2DD4, 0x44190B0D, 0x40D816BA,
	0xACA5C697, 0xA864DB20, 0xA527FDF9, 0xA1E6E04E, 0xBFA1B04B,
	0xBB60ADFC, 0xB6238B25, 0xB2E29692, 0x8AAD2B2F, 0x8E6C3698,
	0x832F1041, 0x87EE0DF6, 0x99A95DF3, 0x9D684044, 0x902B669D,
	0x94EA7B2A, 0xE0B41DE7, 0xE4750050, 0xE9362689, 0xEDF73B3E,
	0xF3B06B3B, 0xF771768C, 0xFA325055, 0xFEF34DE2, 0xC6BCF05F,
	0xC27DEDE8, 0xCF3ECB31, 0xCBFFD686, 0xD5B88683, 0xD1799B34,
	0xDC3ABDED, 0xD8FBA05A, 0x690CE0EE, 0x6DCDFD59, 0x608EDB80,
	0x644FC637, 0x7A089632, 0x7EC98B85, 0x738AAD5C, 0x774BB0EB,
	0x4F040D56, 0x4BC510E1, 0x46863638, 0x42472B8F, 0x5C007B8A,
	0x58C1663D, 0x558240E4, 0x51435D53, 0x251D3B9E, 0x21DC2629,
	0x2C9F00F0, 0x285E1D47, 0x36194D42, 0x32D850F5, 0x3F9B762C,
	0x3B5A6B9B, 0x0315D626, 0x07D4CB91, 0x0A97ED48, 0x0E56F0FF,
	0x1011A0FA, 0x14D0BD4D, 0x19939B94, 0x1D528623, 0xF12F560E,
	0xF5EE4BB9, 0xF8AD6D60, 0xFC6C70D7, 0xE22B20D2, 0xE6EA3D65,
	0xEBA91BBC, 0xEF68060B, 0xD727BBB6, 0xD3E6A601, 0xDEA580D8,
	0xDA649D6F, 0xC423CD6A, 0xC0E2D0DD, 0xCDA1F604, 0xC960EBB3,
	0xBD3E8D7E, 0xB9FF90C9, 0xB4BCB610, 0xB07DABA7, 0xAE3AFBA2,
	0xAAFBE615, 0xA7B8C0CC, 0xA379DD7B, 0x9B3660C6, 0x9FF77D71,
	0x92B45BA8, 0x9675461F, 0x8832161A, 0x8CF30BAD, 0x81B02D74,
	0x857130C3, 0x5D8A9099, 0x594B8D2E, 0x5408ABF7, 0x50C9B640,
	0x4E8EE645, 0x4A4FFBF2, 0x470CDD2B, 0x43CDC09C, 0x7B827D21,
	0x7F436096, 0x7200464F, 0x76C15BF8, 0x68860BFD, 0x6C47164A,
	0x61043093, 0x65C52D24, 0x119B4BE9, 0x155A565E, 0x18197087,
	0x1CD86D30, 0x029F3D35, 0x065E2082, 0x0B1D065B, 0x0FDC1BEC,
	0x3793A651, 0x3352BBE6, 0x3E119D3F, 0x3AD08088, 0x2497D08D,
	0x2056CD3A, 0x2D15EBE3, 0x29D4F654, 0xC5A92679, 0xC1683BCE,
	0xCC2B1D17, 0xC8EA00A0, 0xD6AD50A5, 0xD26C4D12, 0xDF2F6BCB,
	0xDBEE767C, 0xE3A1CBC1, 0xE760D676, 0xEA23F0AF, 0xEEE2ED18,
	0xF0A5BD1D, 0xF464A0AA, 0xF9278673, 0xFDE69BC4, 0x89B8FD09,
	0x8D79E0BE, 0x803AC667, 0x84FBDBD0, 0x9ABC8BD5, 0x9E7D9662,
	0x933EB0BB, 0x97FFAD0C, 0xAFB010B1, 0xAB710D06, 0xA6322BDF,
	0xA2F33668, 0xBCB4666D, 0xB8757BDA, 0xB5365D03, 0xB1F740B4
};

int cs_is_tagged(FILE *fp)
{
	char buf[8];

	fseek(fp, -8, SEEK_END);
	fread(buf, 8, 1, fp);
	if(*(unsigned long*)buf == CKSUM_MAGIC_NUMBER)
		return 1;
	return 0;
}

unsigned long cs_read_sum(FILE *fp)
{
	char buf[8];

	fseek(fp, -8, SEEK_END);
	fread(buf, 8, 1, fp);
	return *((unsigned long*)&buf[4]);
}

int cs_calc_sum(FILE *fp, unsigned long *res, int tagged)
{
	unsigned char buf[BUFLEN];
	unsigned long crc = 0;
	uintmax_t length = 0;
	size_t bytes_read;

	fseek(fp, 0, SEEK_SET);

	while((bytes_read = fread(buf, 1, BUFLEN, fp)) > 0)
	{
		unsigned char *cp = buf;

		if(length + bytes_read < length)
			return 0;

		if(bytes_read != BUFLEN && tagged)
			bytes_read -= 8;

		length += bytes_read;
		while(bytes_read--)
			crc =(crc << 8) ^ crctab[((crc >> 24) ^ *cp++) & 0xFF];
	}

	if(ferror(fp))
		return 0;

	for(; length; length >>= 8)
		crc =(crc << 8) ^ crctab[((crc >> 24) ^ length) & 0xFF];

	crc = ~crc & 0xFFFFFFFF;

	*res = crc;

	return 1;
}

unsigned long cs_calc_buf_sum(char *buf, int size)
{
	unsigned long crc = 0;
	char *cp = buf;
	unsigned long length = size;

	while(size--)
		crc =(crc << 8) ^ crctab[((crc >> 24) ^ *cp++) & 0xFF];

	for(; length; length >>= 8)
		crc =(crc << 8) ^ crctab[((crc >> 24) ^ length) & 0xFF];

	crc = ~crc & 0xFFFFFFFF;

	return crc;
}

unsigned long cs_calc_buf_sum_ds(char *buf, int buf_size, char *sign, int sign_len)
{
	unsigned long crc = 0;
	char *cp = buf;
	unsigned long length = buf_size+sign_len;

	while(buf_size--)
		crc =(crc << 8) ^ crctab[((crc >> 24) ^ *cp++) & 0xFF];

	cp = sign;
	while(sign_len--)
		crc =(crc << 8) ^ crctab[((crc >> 24) ^ *cp++) & 0xFF];


	for(; length; length >>= 8)
		crc =(crc << 8) ^ crctab[((crc >> 24) ^ length) & 0xFF];

	crc = ~crc & 0xFFFFFFFF;

	return crc;
}

int cs_set_sum(FILE *fp, unsigned long sum, int tagged)
{
	unsigned long magic = CKSUM_MAGIC_NUMBER;

	if(tagged)
		fseek(fp, -8, SEEK_END);
	else
		fseek(fp, 0, SEEK_END);

	if(fwrite(&magic, 1, 4, fp) < 4)
		return 0;
	if(fwrite(&sum, 1, 4, fp) < 4)
		return 0;

	return 1;
}

void cs_get_sum(FILE *fp, unsigned long *sum)
{
	unsigned long magic = 0;

	fseek(fp, -8, SEEK_END);

	fread(&magic, 4, 1, fp);
	fread(sum, 4, 1, fp);
}

int cs_validate_file(char *filename)
{
	FILE *pFile = NULL;
	unsigned long sum = 0, res = 0;

	if((pFile = fopen(filename, "r")) == NULL)
		return 0;

	if(!cs_is_tagged(pFile))
	{
		fclose(pFile);
		return 0;
	}
	if(!cs_calc_sum(pFile, &sum, 1))
	{
		fclose(pFile);
		return 0;
	}
	cs_get_sum(pFile, &res);
	fclose(pFile);

	if(sum != res)
		return 0;
	return 1;
}

/* ********* Library internal data ********* */
#define	CMDLINE_TRUE			1
#define	CMDLINE_FALSE			0

typedef	enum CMDLINE_ERR
{
	CMDLINE_ERR_OK		= 0,	/* No Error (OK) */
	CMDLINE_ERR_ERROR	= -1,	/* Unspecified error */
	CMDLINE_ERR_INVKEY	= -3,	/* Invalid option key */
	CMDLINE_ERR_MANYARG	= -4,	/* Too many arguments */
	CMDLINE_ERR_FEWARG	= -5,	/* Too few arguments */
	CMDLINE_ERR_ILLOPT	= -6,	/* Option not allowed (illegal option) */
	CMDLINE_ERR_NOMEM	= -7,	/* No memory */
	CMDLINE_ERR_OPTMIS	= -8	/* A mandatory option is missing */
} CMDLINE_ERR;

/* Argument list */
typedef	struct CMDLINE_ARG
{
	int				index;		/* Index of the argument in the command line */
	struct CMDLINE_ARG*	p_next;	/* Next node in the linked list */
} CMDLINE_ARG;

/* Master control block for an option */
typedef struct CMDLINE_ARGS
{
	int				argc;		/* Total count of arguments found */
	int				optc;		/* Total count of options found */
	CMDLINE_ARG*	list;		/* Argument list */
} CMDLINE_ARGS;

/* Master control block for all found arguments */
typedef	struct CMDLINE_DATA
{
	CMDLINE_ARGS	opt_args[26];	/* Array of MCBs for each option ('a' through 'z') */
	CMDLINE_ARGS	glb_args;		/* Global arguments */
	int				parsed;			/* Internal flag to prevent client calls if library is not initialized */
} CMDLINE_DATA;

/* ********* Local Data ********* */
static CMDLINE_CFG cmdline_cfg;
static CMDLINE_DATA cmdline_data;

char*	cmdline_errmsg = "CMDLINE ERROR";

/* ***************************************************************
* Print all found command line options and their arguments
****************************************************************** */
void* cmdline_getarg_list(char opt)
{
	int index = (opt - 'a');

	/* Check the validity of the index */
	if((index < 0) || (index > 25))
	{
		/* ERROR: Wrong option */
		return NULL;
	}

	/* Return a pointer to the ARGS control structure */
	return((void*)(&cmdline_data.opt_args[index]));
}

/* ***************************************************************
* Print all found command line options and their arguments
****************************************************************** */
int cmdline_getarg_count(void* list)
{
	CMDLINE_ARGS*	p_args = (CMDLINE_ARGS*)list;

	/* Return number of arguments for this option */
	return(p_args->argc);
}

/* ***************************************************************
* Print all found command line options and their arguments
****************************************************************** */
int cmdline_getopt_count(char opt)
{
	int				index;

	/* Calculate index value */
	index = opt - 'a';
	if(index < 0 || index > 25) return -1;

	/* Return number of arguments for this option */
	return(cmdline_data.opt_args[index].optc);
}

/* ***************************************************************
* Print all found command line options and their arguments
****************************************************************** */
int cmdline_getarg(void* list, int num)
{
	int i;
	CMDLINE_ARGS*	p_args = (CMDLINE_ARGS*)list;
	CMDLINE_ARG*	p_arg;

	/* Search the 'num' argument in the list for this option */
	for(i=0,p_arg=p_args->list; (p_arg!=NULL) && (i<p_args->argc); i++, p_arg=p_arg->p_next)
	{
		/* if num matches i, we found it */
		if(i==num) return(p_arg->index);
	}
	/* We did not find the specified argument or the list was empty */
	return -1;
}

/* ***************************************************************
* Print all found command line options and their arguments
****************************************************************** */
int cmdline_configure(CMDLINE_CFG* p_cfg)
{
	/* reset global data */
	memset(&cmdline_cfg,0,sizeof(cmdline_cfg));
	memset(&cmdline_data,0,sizeof(cmdline_data));

	/* Copy the user's config structure */
	cmdline_cfg = *p_cfg;
	return 0;
}

/* ***************************************************************
* Print all found command line options and their arguments
****************************************************************** */
char* cmdline_error(int err)
{
	/* TODO: implement a table of error messages */
	return(cmdline_errmsg);
}

/* ***************************************************************
* Print all found command line options and their arguments
****************************************************************** */
static void cmdline_print_args(CMDLINE_ARGS* p_arglist, char* argv[])
{
	CMDLINE_ARG*	p_arg;

	printf("   Number of times option was specified: %d\n", p_arglist->optc);
	printf("   Number of Arguments:                  %d\n", p_arglist->argc);

	if(p_arglist->argc > 0)
	{
		printf("   Argument List: ");

		for(p_arg=p_arglist->list; p_arg != NULL; p_arg=p_arg->p_next)
			printf("%s ", argv[p_arg->index]);
	}

	printf("\n");
}

/* ***************************************************************
* Print all found command line options and their arguments
****************************************************************** */
void cmdline_print(char* argv[])
{
	int i;

	/* Check if the command line was parsed */
	if(cmdline_data.parsed != CMDLINE_TRUE)
	{
		printf("The command line has not been parsed yet.\n");
		return;
	}

	/* Print out option arguments */
	for( i = 0; i < 26; i++ )
	{
		/* Check if the option was specified */
		if(cmdline_data.opt_args[i].optc !=0 )
		{
			/* Print out option name and arguments */
			printf("Option: -%c\n", (char)('a'+i));
			cmdline_print_args(&(cmdline_data.opt_args[i]), argv);
		}
	}

	/* Print out global arguments */
	printf("Global arguments:\n");
	cmdline_print_args(&(cmdline_data.glb_args), argv);
}

/* ***************************************************************
* Print configuration
****************************************************************** */
void cmdline_print_cfg(void)
{

}

static void cmdline_argadd(CMDLINE_ARGS* p_arglist, CMDLINE_ARG* p_arg)
{
	CMDLINE_ARG*	p_list;
	CMDLINE_ARG*	p_prev=NULL;

	/* See if we had anything in the list */
	if(p_arglist->argc == 0)
	{
		/* Link the argument in */
		p_arglist->list = p_arg;
	}
	else
	{
		/* Find the tail of the list */
		for(p_list=p_arglist->list; p_list != NULL; p_list=p_list->p_next)
			p_prev = p_list;

		/* Link the argument in */
		p_prev->p_next=p_arg;
	}

	/* Keep track of arg number */
	p_arglist->argc++;
}

/* ***************************************************************
* cmdline_read()
* Read and parse command line arguments
****************************************************************** */
int cmdline_read(int argc, char* argv[])
{
	int i, option=0;

	/* Process every command line argument in argv[] array */
	for( i = 1; i < argc; i++ )
	{
		/* Does the argument start with a dash? */
		if( *argv[i] == '-' )
		{
			/* The argument must be two characters: a dash, and a letter */
			if( strlen(argv[i]) != 2 )
			{
				/* ERROR: option syntax (needs to be a dash and one letter) */
				return(CMDLINE_ERR_ERROR);
			}

			/* Check validity of the option key ('a' through 'z') */
			if( ((*(argv[i] + 1)) < 'a') || ((*(argv[i] + 1)) > 'z') )
			{
				/* ERROR: option sysntax (invalid option key) */
				return(CMDLINE_ERR_INVKEY);
			}

			/* Calculate the option index */
			option = (*(argv[i] + 1)) - 'a';
			if((option < 0) || (option > 25)) return(CMDLINE_ERR_INVKEY);

			/* Check to see if the option is allowed */
			if( cmdline_cfg.opts[option].flags & CMDLINE_OPTFLAG_ALLOW )
			{
				/* Option allowed. */
				cmdline_data.opt_args[option].optc++;
				continue;
			}
			else
			{
				/* ERROR: Option is not allowed */
				return(CMDLINE_ERR_ILLOPT);
			}
		}
		else
		{
			/* Read the arguments for the option */
			CMDLINE_ARG*	p_arg;

			/* Allocate space for the argument node */
			p_arg = (CMDLINE_ARG*)calloc(1,sizeof(CMDLINE_ARG));
			if( p_arg== NULL )
			{
				/* ERROR: Can't allocate memory for the argument index */
				return(CMDLINE_ERR_NOMEM);
			}

			/* Initialize the argument */
			p_arg->index	= i;
			p_arg->p_next	= NULL;

			/* Check if we can add to the list of arguments for this option */
			if( (option < 0)																/* Do we have to add to the global list? */
				|| (cmdline_data.opt_args[option].argc == cmdline_cfg.opts[option].max)		/* Did we reach MAX arguments? */
				)
			{
				/* This option does not require arguments. Keep the argument in the global list. */
				cmdline_argadd(&(cmdline_data.glb_args), p_arg);
				continue;
			}
			else
			{
				/* See if the current count has reached max for this option */
				if( cmdline_data.opt_args[option].argc == cmdline_cfg.opts[option].max )
				{
					/* ERROR: too many arguments for an option */
					return(CMDLINE_ERR_MANYARG);
				}
				else
				{
					/* Link the argument to the arg list of the option */
					cmdline_argadd(&(cmdline_data.opt_args[option]), p_arg);
					continue;
				}
			}
		}
	}

	/* ****** We read the complete command line. See if what we collected matches the configuration ******* */

	/* Check every collected option against its configuration */
	for( i=0; i < 26; i++ )
	{
		/* Check if this option was allowed */
		if(cmdline_cfg.opts[i].flags & CMDLINE_OPTFLAG_ALLOW)
		{
			/* See if it was mandatory */
			if(cmdline_cfg.opts[i].flags & CMDLINE_OPTFLAG_MANDAT)
			{
				/* Check if we really collected this option on the command line. */
				if(cmdline_data.opt_args[i].optc == 0)
				{
					/* ERROR: a missing mandatory option */
					return(CMDLINE_ERR_OPTMIS);
				}
				else
				{
					/* Option was there. Check how many args we got for it. */
					if(cmdline_data.opt_args[i].argc < cmdline_cfg.opts[i].min)
					{
						/* ERROR: too few arguments for an option */
						return(CMDLINE_ERR_FEWARG);
					}
					else
					{
						/* This mandatory option was proper. */
						continue;
					}
				}
			}
			else	/* This is non-mandatory option: */
			{
				/* Check if the option was specified on the command line */
				if(cmdline_data.opt_args[i].optc == 0)
				{
					/* option wasn't specified, go to the next */
					continue;
				}
				else
				{
					/* Option was there. Check how many args we collected for it. */
					if(cmdline_data.opt_args[i].argc < cmdline_cfg.opts[i].min)
					{
						/* ERROR: too few arguments for a non-mandatory option */
						return(CMDLINE_ERR_FEWARG);
					}
					else
					{
						/* This non-mandatory option was proper. */
						continue;
					}
				}
			}
		}
		else	/* Option was not allowed. */
		{
			/* We should not get here as the non-allowed options should have been
			trapped eariler. */
		}
	}

	/* Command line was proper as far as the number of options and their arguments */
	cmdline_data.parsed = CMDLINE_TRUE;
	return(CMDLINE_ERR_OK);
}