summaryrefslogtreecommitdiff
path: root/iconvdata/tscii.c
blob: 8b98a0eaa209b5ac40ceb3753a596e8a71d3f147 (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
/* Conversion from and to TSCII.
   Copyright (C) 2002-2014 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Bruno Haible <bruno@clisp.org>, 2002.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <dlfcn.h>
#include <stdint.h>
#include <gconv.h>
#include <assert.h>

/* TSCII is an 8-bit encoding consisting of:
   0x00..0x7F:       ASCII
   0x80..0x90, 0x95..0x9F, 0xAB..0xFE:
                     Tamil letters and glyphs
   0xA1..0xA5, 0xAA: Tamil combining letters (after the base character)
   0xA6..0xA8:       Tamil combining letters (before the base character)
   0x91..0x94:       Punctuation
   0xA9:             Symbols
*/

/* Definitions used in the body of the `gconv' function.  */
#define CHARSET_NAME		"TSCII//"
#define FROM_LOOP		from_tscii
#define TO_LOOP			to_tscii
#define DEFINE_INIT		1
#define DEFINE_FINI		1
#define FROM_LOOP_MIN_NEEDED_FROM	1
#define FROM_LOOP_MAX_NEEDED_FROM	2
#define FROM_LOOP_MIN_NEEDED_TO		4
#define FROM_LOOP_MAX_NEEDED_TO	       16
#define TO_LOOP_MIN_NEEDED_FROM		4
#define TO_LOOP_MAX_NEEDED_FROM		4
#define TO_LOOP_MIN_NEEDED_TO		1
#define TO_LOOP_MAX_NEEDED_TO		3
#define PREPARE_LOOP \
  int saved_state;							      \
  int *statep = &data->__statep->__count;
#define EXTRA_LOOP_ARGS		, statep


/* Since we might have to reset input pointer we must be able to save
   and restore the state.  */
#define SAVE_RESET_STATE(Save) \
  if (Save)								      \
    saved_state = *statep;						      \
  else									      \
    *statep = saved_state


/* During TSCII to UCS-4 conversion, the COUNT element of the state contains
   the last UCS-4 character to be output, shifted by 8 bits, and an encoded
   representation of additional UCS-4 characters to be output (if any),
   shifted by 4 bits.  This character can be:
     0x0000                   Nothing pending.
     0x0BCD                   Pending VIRAMA sign. If bit 3 is set, it may be
                              omitted if followed by a vowel sign U or UU.
     0x0BC6, 0x0BC7, 0x0BC8   Pending vowel sign.  Bit 3 is set after the
                              consonant was seen.
     Other                    Bit 3 always cleared.  */

/* During UCS-4 to TSCII conversion, the COUNT element of the state contains
   the last byte (or sometimes the last two bytes) to be output, shifted by
   3 bits. This can be:
     0x00                     Nothing pending.
     0xB8..0xC9, 0x83..0x86   A consonant.
     0xEC, 0x8A               A consonant with VIRAMA sign (final or joining).
     0x87, 0xC38A             Two consonants combined through a VIRAMA sign. */

/* Since this is a stateful encoding we have to provide code which resets
   the output state to the initial state.  This has to be done during the
   flushing.  */
#define EMIT_SHIFT_TO_INIT \
  if (data->__statep->__count != 0)					      \
    {									      \
      if (FROM_DIRECTION)						      \
	{								      \
	  do								      \
	    {								      \
	      if (__glibc_unlikely (outbuf + 4 > outend))		      \
		{							      \
		  /* We don't have enough room in the output buffer.  */      \
		  status = __GCONV_FULL_OUTPUT;				      \
		  break;						      \
		}							      \
	      /* Write out the pending character.  */			      \
	      *((uint32_t *) outbuf) = data->__statep->__count >> 8;	      \
	      outbuf += sizeof (uint32_t);				      \
	      /* Retrieve the successor state.  */			      \
	      data->__statep->__count =					      \
		tscii_next_state[(data->__statep->__count >> 4) & 0x0f];      \
	    }								      \
	  while (data->__statep->__count != 0);				      \
	}								      \
      else								      \
	{								      \
	  uint32_t last = data->__statep->__count >> 3;			      \
	  if (__glibc_unlikely (last >> 8))				      \
	    {								      \
	      /* Write out the last character, two bytes.  */		      \
	      if (__glibc_likely (outbuf + 2 <= outend))		      \
		{							      \
		  *outbuf++ = last & 0xff;				      \
		  *outbuf++ = (last >> 8) & 0xff;			      \
		  data->__statep->__count = 0;				      \
		}							      \
	      else							      \
		/* We don't have enough room in the output buffer.  */	      \
		status = __GCONV_FULL_OUTPUT;				      \
	    }								      \
	  else								      \
	    {								      \
	      /* Write out the last character, a single byte.  */	      \
	      if (__glibc_likely (outbuf < outend))			      \
		{							      \
		  *outbuf++ = last & 0xff;				      \
		  data->__statep->__count = 0;				      \
		}							      \
	      else							      \
		/* We don't have enough room in the output buffer.  */	      \
		status = __GCONV_FULL_OUTPUT;				      \
	    }								      \
	}								      \
    }


/* First define the conversion function from TSCII to UCS-4.  */

static const uint16_t tscii_to_ucs4[128][2] =
  {
    { 0x0BE6,      0 },
    { 0x0BE7,      0 },
    {      0,      0 },	/* 0x82 - maps to <U0BB8><U0BCD><U0BB0><U0BC0> */
    { 0x0B9C,      0 },
    { 0x0BB7,      0 },
    { 0x0BB8,      0 },
    { 0x0BB9,      0 },
    {      0,      0 },	/* 0x87 - maps to <U0B95><U0BCD><U0BB7> */
    { 0x0B9C, 0x0BCD },
    { 0x0BB7, 0x0BCD },
    {      0,      0 }, /* 0x8a - maps to <U0BB8> and buffers <U0BCD> */
    {      0,      0 }, /* 0x8b - maps to <U0BB9> and buffers <U0BCD> */
    {      0,      0 },	/* 0x8c - maps to <U0B95><U0BCD><U0BB7><U0BCD> */
    { 0x0BE8,      0 },
    { 0x0BE9,      0 },
    { 0x0BEA,      0 },
    { 0x0BEB,      0 },
    { 0x2018,      0 },
    { 0x2019,      0 },
    { 0x201C,      0 },
    { 0x201D,      0 },
    { 0x0BEC,      0 },
    { 0x0BED,      0 },
    { 0x0BEE,      0 },
    { 0x0BEF,      0 },
    { 0x0B99, 0x0BC1 },
    { 0x0B9E, 0x0BC1 },
    { 0x0B99, 0x0BC2 },
    { 0x0B9E, 0x0BC2 },
    { 0x0BF0,      0 },
    { 0x0BF1,      0 },
    { 0x0BF2,      0 },
    {      0,      0 },	/* 0xa0 - unmapped */
    { 0x0BBE,      0 },
    { 0x0BBF,      0 },
    { 0x0BC0,      0 },
    { 0x0BC1,      0 },
    { 0x0BC2,      0 },
    {      0,      0 }, /* 0xa6 - buffers <U0BC6> */
    {      0,      0 }, /* 0xa7 - buffers <U0BC7> */
    {      0,      0 }, /* 0xa8 - buffers <U0BC8> */
    { 0x00A9,      0 },
    { 0x0BD7,      0 },
    { 0x0B85,      0 },
    { 0x0B86,      0 },
    { 0x0B87,      0 },
    { 0x0B88,      0 },
    { 0x0B89,      0 },
    { 0x0B8A,      0 },
    { 0x0B8E,      0 },
    { 0x0B8F,      0 },
    { 0x0B90,      0 },
    { 0x0B92,      0 },
    { 0x0B93,      0 },
    { 0x0B94,      0 },
    { 0x0B83,      0 },
    { 0x0B95,      0 },
    { 0x0B99,      0 },
    { 0x0B9A,      0 },
    { 0x0B9E,      0 },
    { 0x0B9F,      0 },
    { 0x0BA3,      0 },
    { 0x0BA4,      0 },
    { 0x0BA8,      0 },
    { 0x0BAA,      0 },
    { 0x0BAE,      0 },
    { 0x0BAF,      0 },
    { 0x0BB0,      0 },
    { 0x0BB2,      0 },
    { 0x0BB5,      0 },
    { 0x0BB4,      0 },
    { 0x0BB3,      0 },
    { 0x0BB1,      0 },
    { 0x0BA9,      0 },
    { 0x0B9F, 0x0BBF },
    { 0x0B9F, 0x0BC0 },
    { 0x0B95, 0x0BC1 },
    { 0x0B9A, 0x0BC1 },
    { 0x0B9F, 0x0BC1 },
    { 0x0BA3, 0x0BC1 },
    { 0x0BA4, 0x0BC1 },
    { 0x0BA8, 0x0BC1 },
    { 0x0BAA, 0x0BC1 },
    { 0x0BAE, 0x0BC1 },
    { 0x0BAF, 0x0BC1 },
    { 0x0BB0, 0x0BC1 },
    { 0x0BB2, 0x0BC1 },
    { 0x0BB5, 0x0BC1 },
    { 0x0BB4, 0x0BC1 },
    { 0x0BB3, 0x0BC1 },
    { 0x0BB1, 0x0BC1 },
    { 0x0BA9, 0x0BC1 },
    { 0x0B95, 0x0BC2 },
    { 0x0B9A, 0x0BC2 },
    { 0x0B9F, 0x0BC2 },
    { 0x0BA3, 0x0BC2 },
    { 0x0BA4, 0x0BC2 },
    { 0x0BA8, 0x0BC2 },
    { 0x0BAA, 0x0BC2 },
    { 0x0BAE, 0x0BC2 },
    { 0x0BAF, 0x0BC2 },
    { 0x0BB0, 0x0BC2 },
    { 0x0BB2, 0x0BC2 },
    { 0x0BB5, 0x0BC2 },
    { 0x0BB4, 0x0BC2 },
    { 0x0BB3, 0x0BC2 },
    { 0x0BB1, 0x0BC2 },
    { 0x0BA9, 0x0BC2 },
    { 0x0B95, 0x0BCD },
    { 0x0B99, 0x0BCD },
    { 0x0B9A, 0x0BCD },
    { 0x0B9E, 0x0BCD },
    { 0x0B9F, 0x0BCD },
    { 0x0BA3, 0x0BCD },
    { 0x0BA4, 0x0BCD },
    { 0x0BA8, 0x0BCD },
    { 0x0BAA, 0x0BCD },
    { 0x0BAE, 0x0BCD },
    { 0x0BAF, 0x0BCD },
    { 0x0BB0, 0x0BCD },
    { 0x0BB2, 0x0BCD },
    { 0x0BB5, 0x0BCD },
    { 0x0BB4, 0x0BCD },
    { 0x0BB3, 0x0BCD },
    { 0x0BB1, 0x0BCD },
    { 0x0BA9, 0x0BCD },
    { 0x0B87,      0 },
    {      0,      0 }	/* 0xff - unmapped */
  };

static const uint32_t tscii_next_state[6] =
  {
    /* 0 means no more pending Unicode characters.  */
    0,
    /* 1 means <U0BB7>.  */
    (0x0BB7 << 8),
    /* 2 means <U0BC0>.  */
    (0x0BC0 << 8),
    /* 3 means <U0BCD>.  */
    (0x0BCD << 8),
    /* 4 means <U0BB0><U0BC0>.  */
    (0x0BB0 << 8) + (2 << 4),
    /* 5 means <U0BB7><U0BCD>.  */
    (0x0BB7 << 8) + (3 << 4)
  };

#define MIN_NEEDED_INPUT	FROM_LOOP_MIN_NEEDED_FROM
#define MAX_NEEDED_INPUT	FROM_LOOP_MAX_NEEDED_FROM
#define MIN_NEEDED_OUTPUT	FROM_LOOP_MIN_NEEDED_TO
#define MAX_NEEDED_OUTPUT	FROM_LOOP_MAX_NEEDED_TO
#define LOOPFCT			FROM_LOOP
#define BODY \
  {									      \
    uint32_t ch = *inptr;						      \
									      \
    if ((*statep >> 8) != 0)						      \
      {									      \
	/* Attempt to combine the last character with this one.  */	      \
	uint32_t last = *statep >> 8;					      \
									      \
	if (last == 0x0BCD && (*statep & (1 << 3)))			      \
	  {								      \
	    if (ch == 0xa4 || ch == 0xa5)				      \
	      {								      \
		ch += 0xb1d;						      \
		/* Now ch = 0x0BC1 or ch = 0x0BC2.  */			      \
		put32 (outptr, ch);					      \
		outptr += 4;						      \
		*statep = 0;						      \
		inptr++;						      \
		continue;						      \
	      }								      \
	  }								      \
	else if (last >= 0x0BC6 && last <= 0x0BC8)			      \
	  {								      \
	    if ((last == 0x0BC6 && ch == 0xa1)				      \
		|| (last == 0x0BC7 && (ch == 0xa1 || ch == 0xaa)))	      \
	      {								      \
		ch = last + 4 + (ch != 0xa1);				      \
		/* Now ch = 0x0BCA or ch = 0x0BCB or ch = 0x0BCC.  */	      \
		put32 (outptr, ch);					      \
		outptr += 4;						      \
		*statep = 0;						      \
		inptr++;						      \
		continue;						      \
	      }								      \
	    if ((ch >= 0xb8 && ch <= 0xc9) && (*statep & (1 << 3)) == 0)      \
	      {								      \
		ch = tscii_to_ucs4[ch - 0x80][0];			      \
		put32 (outptr, ch);					      \
		outptr += 4;						      \
		*statep |= 1 << 3;					      \
		inptr++;						      \
		continue;						      \
	      }								      \
	  }								      \
									      \
	do								      \
	  {								      \
	    /* Output the buffered character.  */			      \
	    put32 (outptr, last);					      \
	    outptr += 4;						      \
	    /* Retrieve the successor state.  */			      \
	    *statep = tscii_next_state[(*statep >> 4) & 0x0f];		      \
	  }								      \
	while (*statep != 0 && __builtin_expect (outptr + 4 <= outend, 1));   \
									      \
	if (*statep != 0)						      \
	  {								      \
	    /* We don't have enough room in the output buffer.		      \
	       Tell the caller why we terminate the loop.  */		      \
	    result = __GCONV_FULL_OUTPUT;				      \
	    break;							      \
	  }								      \
									      \
	continue;							      \
      }									      \
									      \
    if (ch < 0x80)							      \
      {									      \
	/* Plain ASCII character.  */					      \
	put32 (outptr, ch);						      \
	outptr += 4;							      \
      }									      \
    else								      \
      {									      \
	/* Tamil character.  */						      \
	uint32_t u1 = tscii_to_ucs4[ch - 0x80][0];			      \
									      \
	if (u1 != 0)							      \
	  {								      \
	    uint32_t u2 = tscii_to_ucs4[ch - 0x80][1];			      \
									      \
	    inptr++;							      \
									      \
	    put32 (outptr, u1);						      \
	    outptr += 4;						      \
									      \
	    if (u2 != 0)						      \
	      {								      \
		/* See whether we have room for two characters.  Otherwise    \
		   store only the first character now, and put the second     \
		   one into the queue.  */				      \
		if (__glibc_unlikely (outptr + 4 > outend))		      \
		  {							      \
		    *statep = u2 << 8;					      \
		    result = __GCONV_FULL_OUTPUT;			      \
		    break;						      \
		  }							      \
		put32 (outptr, u2);					      \
		outptr += 4;						      \
	      }								      \
	    continue;							      \
	  }								      \
	/* Special handling of a few Tamil characters.  */		      \
	else if (ch == 0xa6 || ch == 0xa7 || ch == 0xa8)		      \
	  {								      \
	    ch += 0x0b20;						      \
	    /* Now ch = 0x0BC6 or ch = 0x0BC7 or ch = 0x0BC8.  */	      \
	    *statep = ch << 8;						      \
	    inptr++;							      \
	    continue;							      \
	  }								      \
	else if (ch == 0x8a || ch == 0x8b)				      \
	  {								      \
	    ch += 0x0b2e;						      \
	    /* Now ch = 0x0BB8 or ch = 0x0BB9.  */			      \
	    put32 (outptr, ch);						      \
	    outptr += 4;						      \
	    *statep = (0x0BCD << 8) + (1 << 3);				      \
	    inptr++;							      \
	    continue;							      \
	  }								      \
	else if (ch == 0x82)						      \
	  {								      \
	    /* Output <U0BB8><U0BCD><U0BB0><U0BC0>, if we have room for	      \
	       four characters.  */					      \
	    inptr++;							      \
	    put32 (outptr, 0x0BB8);					      \
	    outptr += 4;						      \
	    if (__glibc_unlikely (outptr + 4 > outend))			      \
	      {								      \
		*statep = (0x0BCD << 8) + (4 << 4);			      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
	    put32 (outptr, 0x0BCD);					      \
	    outptr += 4;						      \
	    if (__glibc_unlikely (outptr + 4 > outend))			      \
	      {								      \
		*statep = (0x0BB0 << 8) + (2 << 4);			      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
	    put32 (outptr, 0x0BB0);					      \
	    outptr += 4;						      \
	    if (__glibc_unlikely (outptr + 4 > outend))			      \
	      {								      \
		*statep = (0x0BC0 << 8);				      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
	    put32 (outptr, 0x0BC0);					      \
	    outptr += 4;						      \
	    continue;							      \
	  }								      \
	else if (ch == 0x87)						      \
	  {								      \
	    /* Output <U0B95><U0BCD><U0BB7>, if we have room for	      \
	       three characters.  */					      \
	    inptr++;							      \
	    put32 (outptr, 0x0B95);					      \
	    outptr += 4;						      \
	    if (__glibc_unlikely (outptr + 4 > outend))			      \
	      {								      \
		*statep = (0x0BCD << 8) + (1 << 4);			      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
	    put32 (outptr, 0x0BCD);					      \
	    outptr += 4;						      \
	    if (__glibc_unlikely (outptr + 4 > outend))			      \
	      {								      \
		*statep = (0x0BB7 << 8);				      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
	    put32 (outptr, 0x0BB7);					      \
	    outptr += 4;						      \
	    continue;							      \
	  }								      \
	else if (ch == 0x8c)						      \
	  {								      \
	    /* Output <U0B95><U0BCD><U0BB7><U0BCD>, if we have room for	      \
	       four characters.  */					      \
	    inptr++;							      \
	    put32 (outptr, 0x0B95);					      \
	    outptr += 4;						      \
	    if (__glibc_unlikely (outptr + 4 > outend))			      \
	      {								      \
		*statep = (0x0BCD << 8) + (5 << 4);			      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
	    put32 (outptr, 0x0BCD);					      \
	    outptr += 4;						      \
	    if (__glibc_unlikely (outptr + 4 > outend))			      \
	      {								      \
		*statep = (0x0BB7 << 8) + (3 << 4);			      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
	    put32 (outptr, 0x0BB7);					      \
	    outptr += 4;						      \
	    if (__glibc_unlikely (outptr + 4 > outend))			      \
	      {								      \
		*statep = (0x0BCD << 8);				      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
	    put32 (outptr, 0x0BCD);					      \
	    outptr += 4;						      \
	    continue;							      \
	  }								      \
	else								      \
	  {								      \
	    /* This is illegal.  */					      \
	    STANDARD_FROM_LOOP_ERR_HANDLER (1);				      \
	  }								      \
      }									      \
									      \
    /* Now that we wrote the output increment the input pointer.  */	      \
    inptr++;								      \
  }
#define LOOP_NEED_FLAGS
#define EXTRA_LOOP_DECLS	, int *statep
#include <iconv/loop.c>


/* Next, define the other direction, from UCS-4 to TSCII.  */

static const uint8_t ucs4_to_tscii[128] =
  {
       0,    0,    0, 0xb7,    0, 0xab, 0xac, 0xfe, /* 0x0B80..0x0B87 */
    0xae, 0xaf, 0xb0,    0,    0,    0, 0xb1, 0xb2, /* 0x0B88..0x0B8F */
    0xb3,    0, 0xb4, 0xb5, 0xb6, 0xb8,    0,    0, /* 0x0B90..0x0B97 */
       0, 0xb9, 0xba,    0, 0x83,    0, 0xbb, 0xbc, /* 0x0B98..0x0B9F */
       0,    0,    0, 0xbd, 0xbe,    0,    0,    0, /* 0x0BA0..0x0BA7 */
    0xbf, 0xc9, 0xc0,    0,    0,    0, 0xc1, 0xc2, /* 0x0BA8..0x0BAF */
    0xc3, 0xc8, 0xc4, 0xc7, 0xc6, 0xc5,    0, 0x84, /* 0x0BB0..0x0BB7 */
    0x85, 0x86,    0,    0,    0,    0, 0xa1, 0xa2, /* 0x0BB8..0x0BBF */
    0xa3, 0xa4, 0xa5,    0,    0,    0, 0xa6, 0xa7, /* 0x0BC0..0x0BC7 */
    0xa8,    0,    0,    0,    0,    0,    0,    0, /* 0x0BC8..0x0BCF */
       0,    0,    0,    0,    0,    0,    0, 0xaa, /* 0x0BD0..0x0BD7 */
       0,    0,    0,    0,    0,    0,    0,    0, /* 0x0BD8..0x0BDF */
       0,    0,    0,    0,    0,    0, 0x80, 0x81, /* 0x0BE0..0x0BE7 */
    0x8d, 0x8e, 0x8f, 0x90, 0x95, 0x96, 0x97, 0x98, /* 0x0BE8..0x0BEF */
    0x9d, 0x9e, 0x9f,    0,    0,    0,    0,    0, /* 0x0BF0..0x0BF7 */
       0,    0,    0,    0,    0,    0,    0,    0  /* 0x0BF8..0x0BFF */
  };

static const uint8_t consonant_with_u[18] =
  {
    0xcc, 0x99, 0xcd, 0x9a, 0xce, 0xcf, 0xd0, 0xd1, 0xd2,
    0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xdb
  };

static const uint8_t consonant_with_uu[18] =
  {
    0xdc, 0x9b, 0xdd, 0x9c, 0xde, 0xdf, 0xe0, 0xe1, 0xe2,
    0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb
  };

static const uint8_t consonant_with_virama[18] =
  {
    0xec, 0xed, 0xee, 0xef, 0xf0, 0xf1, 0xf2, 0xf3, 0xf4,
    0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd
  };

#define MIN_NEEDED_INPUT	TO_LOOP_MIN_NEEDED_FROM
#define MAX_NEEDED_INPUT	TO_LOOP_MAX_NEEDED_FROM
#define MIN_NEEDED_OUTPUT	TO_LOOP_MIN_NEEDED_TO
#define MAX_NEEDED_OUTPUT	TO_LOOP_MAX_NEEDED_TO
#define LOOPFCT			TO_LOOP
#define BODY \
  {									      \
    uint32_t ch = get32 (inptr);					      \
									      \
    if ((*statep >> 3) != 0)						      \
      {									      \
	/* Attempt to combine the last character with this one.  */	      \
	uint32_t last = *statep >> 3;					      \
									      \
	if (last >= 0xb8 && last <= 0xc9)				      \
	  {								      \
	    if (ch == 0x0BC1)						      \
	      {								      \
		*outptr++ = consonant_with_u[last - 0xb8];		      \
		*statep = 0;						      \
		inptr += 4;						      \
		continue;						      \
	      }								      \
	    if (ch == 0x0BC2)						      \
	      {								      \
		*outptr++ = consonant_with_uu[last - 0xb8];		      \
		*statep = 0;						      \
		inptr += 4;						      \
		continue;						      \
	      }								      \
	    if (ch == 0x0BC6)						      \
	      {								      \
		if (__glibc_likely (outptr + 2 <= outend))		      \
		  {							      \
		    *outptr++ = 0xa6;					      \
		    *outptr++ = last;					      \
		    *statep = 0;					      \
		    inptr += 4;						      \
		    continue;						      \
		  }							      \
		else							      \
		  {							      \
		    result = __GCONV_FULL_OUTPUT;			      \
		    break;						      \
		  }							      \
	      }								      \
	    if (ch == 0x0BC7)						      \
	      {								      \
		if (__glibc_likely (outptr + 2 <= outend))		      \
		  {							      \
		    *outptr++ = 0xa7;					      \
		    *outptr++ = last;					      \
		    *statep = 0;					      \
		    inptr += 4;						      \
		    continue;						      \
		  }							      \
		else							      \
		  {							      \
		    result = __GCONV_FULL_OUTPUT;			      \
		    break;						      \
		  }							      \
	      }								      \
	    if (ch == 0x0BC8)						      \
	      {								      \
		if (__glibc_likely (outptr + 2 <= outend))		      \
		  {							      \
		    *outptr++ = 0xa8;					      \
		    *outptr++ = last;					      \
		    *statep = 0;					      \
		    inptr += 4;						      \
		    continue;						      \
		  }							      \
		else							      \
		  {							      \
		    result = __GCONV_FULL_OUTPUT;			      \
		    break;						      \
		  }							      \
	      }								      \
	    if (ch == 0x0BCA)						      \
	      {								      \
		if (__glibc_likely (outptr + 3 <= outend))		      \
		  {							      \
		    *outptr++ = 0xa6;					      \
		    *outptr++ = last;					      \
		    *outptr++ = 0xa1;					      \
		    *statep = 0;					      \
		    inptr += 4;						      \
		    continue;						      \
		  }							      \
		else							      \
		  {							      \
		    result = __GCONV_FULL_OUTPUT;			      \
		    break;						      \
		  }							      \
	      }								      \
	    if (ch == 0x0BCB)						      \
	      {								      \
		if (__glibc_likely (outptr + 3 <= outend))		      \
		  {							      \
		    *outptr++ = 0xa7;					      \
		    *outptr++ = last;					      \
		    *outptr++ = 0xa1;					      \
		    *statep = 0;					      \
		    inptr += 4;						      \
		    continue;						      \
		  }							      \
		else							      \
		  {							      \
		    result = __GCONV_FULL_OUTPUT;			      \
		    break;						      \
		  }							      \
	      }								      \
	    if (ch == 0x0BCC)						      \
	      {								      \
		if (__glibc_likely (outptr + 3 <= outend))		      \
		  {							      \
		    *outptr++ = 0xa7;					      \
		    *outptr++ = last;					      \
		    *outptr++ = 0xaa;					      \
		    *statep = 0;					      \
		    inptr += 4;						      \
		    continue;						      \
		  }							      \
		else							      \
		  {							      \
		    result = __GCONV_FULL_OUTPUT;			      \
		    break;						      \
		  }							      \
	      }								      \
	    if (ch == 0x0BCD)						      \
	      {								      \
		if (last != 0xb8)					      \
		  {							      \
		    *outptr++ = consonant_with_virama[last - 0xb8];	      \
		    *statep = 0;					      \
		  }							      \
		else							      \
		  *statep = 0xec << 3;					      \
		inptr += 4;						      \
		continue;						      \
	      }								      \
	    if (last == 0xbc && (ch == 0x0BBF || ch == 0x0BC0))		      \
	      {								      \
		*outptr++ = ch - 0x0af5;				      \
		*statep = 0;						      \
		inptr += 4;						      \
		continue;						      \
	      }								      \
	  }								      \
	else if (last >= 0x83 && last <= 0x86)				      \
	  {								      \
	    if (last >= 0x85 && (ch == 0x0BC1 || ch == 0x0BC2))		      \
	      {								      \
		*outptr++ = last + 5;					      \
		*statep = 0;						      \
		continue;						      \
	      }								      \
	    if (ch == 0x0BCD)						      \
	      {								      \
		if (last != 0x85)					      \
		  {							      \
		    *outptr++ = last + 5;				      \
		    *statep = 0;					      \
		  }							      \
		else							      \
		  *statep = 0x8a << 3;					      \
		inptr += 4;						      \
		continue;						      \
	      }								      \
	  }								      \
	else if (last == 0xec)						      \
	  {								      \
	    if (ch == 0x0BB7)						      \
	      {								      \
		*statep = 0x87 << 3;					      \
		inptr += 4;						      \
		continue;						      \
	      }								      \
	  }								      \
	else if (last == 0x8a)						      \
	  {								      \
	    if (ch == 0x0BB0)						      \
	      {								      \
		*statep = 0xc38a << 3;					      \
		inptr += 4;						      \
		continue;						      \
	      }								      \
	  }								      \
	else if (last == 0x87)						      \
	  {								      \
	    if (ch == 0x0BCD)						      \
	      {								      \
		*outptr++ = 0x8c;					      \
		*statep = 0;						      \
		inptr += 4;						      \
		continue;						      \
	      }								      \
	  }								      \
	else								      \
	  {								      \
	    assert (last == 0xc38a);					      \
	    if (ch == 0x0BC0)						      \
	      {								      \
		*outptr++ = 0x82;					      \
		*statep = 0;						      \
		inptr += 4;						      \
		continue;						      \
	      }								      \
	  }								      \
									      \
	/* Output the buffered character.  */				      \
	if (__glibc_unlikely (last >> 8))				      \
	  {								      \
	    if (__glibc_likely (outptr + 2 <= outend))			      \
	      {								      \
		*outptr++ = last & 0xff;				      \
		*outptr++ = (last >> 8) & 0xff;				      \
	      }								      \
	    else							      \
	      {								      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
	  }								      \
        else								      \
	  *outptr++ = last & 0xff;					      \
	*statep = 0;							      \
	continue;							      \
      }									      \
									      \
    if (ch < 0x80)							      \
      /* Plain ASCII character.  */					      \
      *outptr++ = ch;							      \
    else if (ch >= 0x0B80 && ch <= 0x0BFF)				      \
      {									      \
	/* Tamil character.  */						      \
	uint8_t t = ucs4_to_tscii[ch - 0x0B80];				      \
									      \
	if (t != 0)							      \
	  {								      \
	    if ((t >= 0xb8 && t <= 0xc9) || (t >= 0x83 && t <= 0x86))	      \
	      *statep = (uint32_t) t << 3;				      \
	    else							      \
	      *outptr++ = t;						      \
	  }								      \
	else if (ch >= 0x0BCA && ch <= 0x0BCC)				      \
	  {								      \
	    /* See whether we have room for two bytes.  */		      \
	    if (__glibc_likely (outptr + 2 <= outend))			      \
	      {								      \
		*outptr++ = (ch == 0x0BCA ? 0xa6 : 0xa7);		      \
		*outptr++ = (ch != 0x0BCC ? 0xa1 : 0xaa);		      \
	      }								      \
	    else							      \
	      {								      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
	  }								      \
	else								      \
	  {								      \
	    /* Illegal character.  */					      \
	    STANDARD_TO_LOOP_ERR_HANDLER (4);				      \
	  }								      \
      }									      \
    else if (ch == 0x00A9)						      \
      *outptr++ = ch;							      \
    else if (ch == 0x2018 || ch == 0x2019)				      \
      *outptr++ = ch - 0x1f87;						      \
    else if (ch == 0x201C || ch == 0x201D)				      \
      *outptr++ = ch - 0x1f89;						      \
    else								      \
      {									      \
	UNICODE_TAG_HANDLER (ch, 4);					      \
									      \
	/* Illegal character.  */					      \
	STANDARD_TO_LOOP_ERR_HANDLER (4);				      \
      }									      \
									      \
    /* Now that we wrote the output increment the input pointer.  */	      \
    inptr += 4;								      \
  }
#define LOOP_NEED_FLAGS
#define EXTRA_LOOP_DECLS	, int *statep
#include <iconv/loop.c>


/* Now define the toplevel functions.  */
#include <iconv/skeleton.c>