aboutsummaryrefslogtreecommitdiff
path: root/iconv/gconv_simple.c
blob: c186bc37c357885034601c27226a15eb0dbe7339 (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
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
/* Simple transformations functions.
   Copyright (C) 1997-2021 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   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
   <https://www.gnu.org/licenses/>.  */

#include <byteswap.h>
#include <dlfcn.h>
#include <endian.h>
#include <errno.h>
#include <gconv.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <sys/param.h>
#include <gconv_int.h>

#define BUILTIN_ALIAS(s1, s2) /* nothing */
#define BUILTIN_TRANSFORMATION(From, To, Cost, Name, Fct, BtowcFct, \
			       MinF, MaxF, MinT, MaxT) \
  extern int Fct (struct __gconv_step *, struct __gconv_step_data *,	      \
		  const unsigned char **, const unsigned char *,	      \
		  unsigned char **, size_t *, int, int);
#include "gconv_builtin.h"


#ifndef EILSEQ
# define EILSEQ EINVAL
#endif


/* Specialized conversion function for a single byte to INTERNAL, recognizing
   only ASCII characters.  */
wint_t
__gconv_btwoc_ascii (struct __gconv_step *step, unsigned char c)
{
  if (c < 0x80)
    return c;
  else
    return WEOF;
}


/* Transform from the internal, UCS4-like format, to UCS4.  The
   difference between the internal ucs4 format and the real UCS4
   format is, if any, the endianess.  The Unicode/ISO 10646 says that
   unless some higher protocol specifies it differently, the byte
   order is big endian.*/
#define DEFINE_INIT		0
#define DEFINE_FINI		0
#define MIN_NEEDED_FROM		4
#define MIN_NEEDED_TO		4
#define FROM_DIRECTION		1
#define FROM_LOOP		internal_ucs4_loop
#define TO_LOOP			internal_ucs4_loop /* This is not used.  */
#define FUNCTION_NAME		__gconv_transform_internal_ucs4
#define ONE_DIRECTION		0


static inline int
__attribute ((always_inline))
internal_ucs4_loop (struct __gconv_step *step,
		    struct __gconv_step_data *step_data,
		    const unsigned char **inptrp, const unsigned char *inend,
		    unsigned char **outptrp, const unsigned char *outend,
		    size_t *irreversible)
{
  const unsigned char *inptr = *inptrp;
  unsigned char *outptr = *outptrp;
  size_t n_convert = MIN (inend - inptr, outend - outptr) / 4;
  int result;

#if __BYTE_ORDER == __LITTLE_ENDIAN
  /* Sigh, we have to do some real work.  */
  size_t cnt;
  uint32_t *outptr32 = (uint32_t *) outptr;

  for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4)
    *outptr32++ = bswap_32 (*(const uint32_t *) inptr);

  *inptrp = inptr;
  *outptrp = (unsigned char *) outptr32;
#elif __BYTE_ORDER == __BIG_ENDIAN
  /* Simply copy the data.  */
  *inptrp = inptr + n_convert * 4;
  *outptrp = __mempcpy (outptr, inptr, n_convert * 4);
#else
# error "This endianess is not supported."
#endif

  /* Determine the status.  */
  if (*inptrp == inend)
    result = __GCONV_EMPTY_INPUT;
  else if (*outptrp + 4 > outend)
    result = __GCONV_FULL_OUTPUT;
  else
    result = __GCONV_INCOMPLETE_INPUT;

  return result;
}

#if !_STRING_ARCH_unaligned
static inline int
__attribute ((always_inline))
internal_ucs4_loop_unaligned (struct __gconv_step *step,
			      struct __gconv_step_data *step_data,
			      const unsigned char **inptrp,
			      const unsigned char *inend,
			      unsigned char **outptrp,
			      const unsigned char *outend,
			      size_t *irreversible)
{
  const unsigned char *inptr = *inptrp;
  unsigned char *outptr = *outptrp;
  size_t n_convert = MIN (inend - inptr, outend - outptr) / 4;
  int result;

# if __BYTE_ORDER == __LITTLE_ENDIAN
  /* Sigh, we have to do some real work.  */
  size_t cnt;

  for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4, outptr += 4)
    {
      outptr[0] = inptr[3];
      outptr[1] = inptr[2];
      outptr[2] = inptr[1];
      outptr[3] = inptr[0];
    }

  *inptrp = inptr;
  *outptrp = outptr;
# elif __BYTE_ORDER == __BIG_ENDIAN
  /* Simply copy the data.  */
  *inptrp = inptr + n_convert * 4;
  *outptrp = __mempcpy (outptr, inptr, n_convert * 4);
# else
#  error "This endianess is not supported."
# endif

  /* Determine the status.  */
  if (*inptrp == inend)
    result = __GCONV_EMPTY_INPUT;
  else if (*outptrp + 4 > outend)
    result = __GCONV_FULL_OUTPUT;
  else
    result = __GCONV_INCOMPLETE_INPUT;

  return result;
}
#endif


static inline int
__attribute ((always_inline))
internal_ucs4_loop_single (struct __gconv_step *step,
			   struct __gconv_step_data *step_data,
			   const unsigned char **inptrp,
			   const unsigned char *inend,
			   unsigned char **outptrp,
			   const unsigned char *outend,
			   size_t *irreversible)
{
  mbstate_t *state = step_data->__statep;
  size_t cnt = state->__count & 7;

  while (*inptrp < inend && cnt < 4)
    state->__value.__wchb[cnt++] = *(*inptrp)++;

  if (__glibc_unlikely (cnt < 4))
    {
      /* Still not enough bytes.  Store the ones in the input buffer.  */
      state->__count &= ~7;
      state->__count |= cnt;

      return __GCONV_INCOMPLETE_INPUT;
    }

#if __BYTE_ORDER == __LITTLE_ENDIAN
  (*outptrp)[0] = state->__value.__wchb[3];
  (*outptrp)[1] = state->__value.__wchb[2];
  (*outptrp)[2] = state->__value.__wchb[1];
  (*outptrp)[3] = state->__value.__wchb[0];

#elif __BYTE_ORDER == __BIG_ENDIAN
  /* XXX unaligned */
  (*outptrp)[0] = state->__value.__wchb[0];
  (*outptrp)[1] = state->__value.__wchb[1];
  (*outptrp)[2] = state->__value.__wchb[2];
  (*outptrp)[3] = state->__value.__wchb[3];
#else
# error "This endianess is not supported."
#endif
  *outptrp += 4;

  /* Clear the state buffer.  */
  state->__count &= ~7;

  return __GCONV_OK;
}

#include <iconv/skeleton.c>


/* Transform from UCS4 to the internal, UCS4-like format.  Unlike
   for the other direction we have to check for correct values here.  */
#define DEFINE_INIT		0
#define DEFINE_FINI		0
#define MIN_NEEDED_FROM		4
#define MIN_NEEDED_TO		4
#define FROM_DIRECTION		1
#define FROM_LOOP		ucs4_internal_loop
#define TO_LOOP			ucs4_internal_loop /* This is not used.  */
#define FUNCTION_NAME		__gconv_transform_ucs4_internal
#define ONE_DIRECTION		0


static inline int
__attribute ((always_inline))
ucs4_internal_loop (struct __gconv_step *step,
		    struct __gconv_step_data *step_data,
		    const unsigned char **inptrp, const unsigned char *inend,
		    unsigned char **outptrp, const unsigned char *outend,
		    size_t *irreversible)
{
  int flags = step_data->__flags;
  const unsigned char *inptr = *inptrp;
  unsigned char *outptr = *outptrp;
  int result;

  for (; inptr + 4 <= inend && outptr + 4 <= outend; inptr += 4)
    {
      uint32_t inval;

#if __BYTE_ORDER == __LITTLE_ENDIAN
      inval = bswap_32 (*(const uint32_t *) inptr);
#else
      inval = *(const uint32_t *) inptr;
#endif

      if (__glibc_unlikely (inval > 0x7fffffff))
	{
	  /* The value is too large.  We don't try transliteration here since
	     this is not an error because of the lack of possibilities to
	     represent the result.  This is a genuine bug in the input since
	     UCS4 does not allow such values.  */
	  if (irreversible == NULL)
	    /* We are transliterating, don't try to correct anything.  */
	    return __GCONV_ILLEGAL_INPUT;

	  if (flags & __GCONV_IGNORE_ERRORS)
	    {
	      /* Just ignore this character.  */
	      ++*irreversible;
	      continue;
	    }

	  *inptrp = inptr;
	  *outptrp = outptr;
	  return __GCONV_ILLEGAL_INPUT;
	}

      *((uint32_t *) outptr) = inval;
      outptr += sizeof (uint32_t);
    }

  *inptrp = inptr;
  *outptrp = outptr;

  /* Determine the status.  */
  if (*inptrp == inend)
    result = __GCONV_EMPTY_INPUT;
  else if (*outptrp + 4 > outend)
    result = __GCONV_FULL_OUTPUT;
  else
    result = __GCONV_INCOMPLETE_INPUT;

  return result;
}

#if !_STRING_ARCH_unaligned
static inline int
__attribute ((always_inline))
ucs4_internal_loop_unaligned (struct __gconv_step *step,
			      struct __gconv_step_data *step_data,
			      const unsigned char **inptrp,
			      const unsigned char *inend,
			      unsigned char **outptrp,
			      const unsigned char *outend,
			      size_t *irreversible)
{
  int flags = step_data->__flags;
  const unsigned char *inptr = *inptrp;
  unsigned char *outptr = *outptrp;
  int result;

  for (; inptr + 4 <= inend && outptr + 4 <= outend; inptr += 4)
    {
      if (__glibc_unlikely (inptr[0] > 0x80))
	{
	  /* The value is too large.  We don't try transliteration here since
	     this is not an error because of the lack of possibilities to
	     represent the result.  This is a genuine bug in the input since
	     UCS4 does not allow such values.  */
	  if (irreversible == NULL)
	    /* We are transliterating, don't try to correct anything.  */
	    return __GCONV_ILLEGAL_INPUT;

	  if (flags & __GCONV_IGNORE_ERRORS)
	    {
	      /* Just ignore this character.  */
	      ++*irreversible;
	      continue;
	    }

	  *inptrp = inptr;
	  *outptrp = outptr;
	  return __GCONV_ILLEGAL_INPUT;
	}

# if __BYTE_ORDER == __LITTLE_ENDIAN
      outptr[3] = inptr[0];
      outptr[2] = inptr[1];
      outptr[1] = inptr[2];
      outptr[0] = inptr[3];
# else
      outptr[0] = inptr[0];
      outptr[1] = inptr[1];
      outptr[2] = inptr[2];
      outptr[3] = inptr[3];
# endif
      outptr += 4;
    }

  *inptrp = inptr;
  *outptrp = outptr;

  /* Determine the status.  */
  if (*inptrp == inend)
    result = __GCONV_EMPTY_INPUT;
  else if (*outptrp + 4 > outend)
    result = __GCONV_FULL_OUTPUT;
  else
    result = __GCONV_INCOMPLETE_INPUT;

  return result;
}
#endif


static inline int
__attribute ((always_inline))
ucs4_internal_loop_single (struct __gconv_step *step,
			   struct __gconv_step_data *step_data,
			   const unsigned char **inptrp,
			   const unsigned char *inend,
			   unsigned char **outptrp,
			   const unsigned char *outend,
			   size_t *irreversible)
{
  mbstate_t *state = step_data->__statep;
  int flags = step_data->__flags;
  size_t cnt = state->__count & 7;

  while (*inptrp < inend && cnt < 4)
    state->__value.__wchb[cnt++] = *(*inptrp)++;

  if (__glibc_unlikely (cnt < 4))
    {
      /* Still not enough bytes.  Store the ones in the input buffer.  */
      state->__count &= ~7;
      state->__count |= cnt;

      return __GCONV_INCOMPLETE_INPUT;
    }

  if (__builtin_expect (((unsigned char *) state->__value.__wchb)[0] > 0x80,
			0))
    {
      /* The value is too large.  We don't try transliteration here since
	 this is not an error because of the lack of possibilities to
	 represent the result.  This is a genuine bug in the input since
	 UCS4 does not allow such values.  */
      if (!(flags & __GCONV_IGNORE_ERRORS))
	{
	  *inptrp -= cnt - (state->__count & 7);
	  return __GCONV_ILLEGAL_INPUT;
	}
    }
  else
    {
#if __BYTE_ORDER == __LITTLE_ENDIAN
      (*outptrp)[0] = state->__value.__wchb[3];
      (*outptrp)[1] = state->__value.__wchb[2];
      (*outptrp)[2] = state->__value.__wchb[1];
      (*outptrp)[3] = state->__value.__wchb[0];
#elif __BYTE_ORDER == __BIG_ENDIAN
      (*outptrp)[0] = state->__value.__wchb[0];
      (*outptrp)[1] = state->__value.__wchb[1];
      (*outptrp)[2] = state->__value.__wchb[2];
      (*outptrp)[3] = state->__value.__wchb[3];
#endif

      *outptrp += 4;
    }

  /* Clear the state buffer.  */
  state->__count &= ~7;

  return __GCONV_OK;
}

#include <iconv/skeleton.c>


/* Similarly for the little endian form.  */
#define DEFINE_INIT		0
#define DEFINE_FINI		0
#define MIN_NEEDED_FROM		4
#define MIN_NEEDED_TO		4
#define FROM_DIRECTION		1
#define FROM_LOOP		internal_ucs4le_loop
#define TO_LOOP			internal_ucs4le_loop /* This is not used.  */
#define FUNCTION_NAME		__gconv_transform_internal_ucs4le
#define ONE_DIRECTION		0


static inline int
__attribute ((always_inline))
internal_ucs4le_loop (struct __gconv_step *step,
		      struct __gconv_step_data *step_data,
		      const unsigned char **inptrp, const unsigned char *inend,
		      unsigned char **outptrp, const unsigned char *outend,
		      size_t *irreversible)
{
  const unsigned char *inptr = *inptrp;
  unsigned char *outptr = *outptrp;
  size_t n_convert = MIN (inend - inptr, outend - outptr) / 4;
  int result;

#if __BYTE_ORDER == __BIG_ENDIAN
  /* Sigh, we have to do some real work.  */
  size_t cnt;
  uint32_t *outptr32 = (uint32_t *) outptr;

  for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4)
    *outptr32++ = bswap_32 (*(const uint32_t *) inptr);
  outptr = (unsigned char *) outptr32;

  *inptrp = inptr;
  *outptrp = outptr;
#elif __BYTE_ORDER == __LITTLE_ENDIAN
  /* Simply copy the data.  */
  *inptrp = inptr + n_convert * 4;
  *outptrp = __mempcpy (outptr, inptr, n_convert * 4);
#else
# error "This endianess is not supported."
#endif

  /* Determine the status.  */
  if (*inptrp == inend)
    result = __GCONV_EMPTY_INPUT;
  else if (*outptrp + 4 > outend)
    result = __GCONV_FULL_OUTPUT;
  else
    result = __GCONV_INCOMPLETE_INPUT;

  return result;
}

#if !_STRING_ARCH_unaligned
static inline int
__attribute ((always_inline))
internal_ucs4le_loop_unaligned (struct __gconv_step *step,
				struct __gconv_step_data *step_data,
				const unsigned char **inptrp,
				const unsigned char *inend,
				unsigned char **outptrp,
				const unsigned char *outend,
				size_t *irreversible)
{
  const unsigned char *inptr = *inptrp;
  unsigned char *outptr = *outptrp;
  size_t n_convert = MIN (inend - inptr, outend - outptr) / 4;
  int result;

# if __BYTE_ORDER == __BIG_ENDIAN
  /* Sigh, we have to do some real work.  */
  size_t cnt;

  for (cnt = 0; cnt < n_convert; ++cnt, inptr += 4, outptr += 4)
    {
      outptr[0] = inptr[3];
      outptr[1] = inptr[2];
      outptr[2] = inptr[1];
      outptr[3] = inptr[0];
    }

  *inptrp = inptr;
  *outptrp = outptr;
# elif __BYTE_ORDER == __LITTLE_ENDIAN
  /* Simply copy the data.  */
  *inptrp = inptr + n_convert * 4;
  *outptrp = __mempcpy (outptr, inptr, n_convert * 4);
# else
#  error "This endianess is not supported."
# endif

  /* Determine the status.  */
  if (*inptrp == inend)
    result = __GCONV_EMPTY_INPUT;
  else if (*inptrp + 4 > inend)
    result = __GCONV_INCOMPLETE_INPUT;
  else
    {
      assert (*outptrp + 4 > outend);
      result = __GCONV_FULL_OUTPUT;
    }

  return result;
}
#endif


static inline int
__attribute ((always_inline))
internal_ucs4le_loop_single (struct __gconv_step *step,
			     struct __gconv_step_data *step_data,
			     const unsigned char **inptrp,
			     const unsigned char *inend,
			     unsigned char **outptrp,
			     const unsigned char *outend,
			     size_t *irreversible)
{
  mbstate_t *state = step_data->__statep;
  size_t cnt = state->__count & 7;

  while (*inptrp < inend && cnt < 4)
    state->__value.__wchb[cnt++] = *(*inptrp)++;

  if (__glibc_unlikely (cnt < 4))
    {
      /* Still not enough bytes.  Store the ones in the input buffer.  */
      state->__count &= ~7;
      state->__count |= cnt;

      return __GCONV_INCOMPLETE_INPUT;
    }

#if __BYTE_ORDER == __BIG_ENDIAN
  (*outptrp)[0] = state->__value.__wchb[3];
  (*outptrp)[1] = state->__value.__wchb[2];
  (*outptrp)[2] = state->__value.__wchb[1];
  (*outptrp)[3] = state->__value.__wchb[0];

#else
  /* XXX unaligned */
  (*outptrp)[0] = state->__value.__wchb[0];
  (*outptrp)[1] = state->__value.__wchb[1];
  (*outptrp)[2] = state->__value.__wchb[2];
  (*outptrp)[3] = state->__value.__wchb[3];

#endif

  *outptrp += 4;

  /* Clear the state buffer.  */
  state->__count &= ~7;

  return __GCONV_OK;
}

#include <iconv/skeleton.c>


/* And finally from UCS4-LE to the internal encoding.  */
#define DEFINE_INIT		0
#define DEFINE_FINI		0
#define MIN_NEEDED_FROM		4
#define MIN_NEEDED_TO		4
#define FROM_DIRECTION		1
#define FROM_LOOP		ucs4le_internal_loop
#define TO_LOOP			ucs4le_internal_loop /* This is not used.  */
#define FUNCTION_NAME		__gconv_transform_ucs4le_internal
#define ONE_DIRECTION		0


static inline int
__attribute ((always_inline))
ucs4le_internal_loop (struct __gconv_step *step,
		      struct __gconv_step_data *step_data,
		      const unsigned char **inptrp, const unsigned char *inend,
		      unsigned char **outptrp, const unsigned char *outend,
		      size_t *irreversible)
{
  int flags = step_data->__flags;
  const unsigned char *inptr = *inptrp;
  unsigned char *outptr = *outptrp;
  int result;

  for (; inptr + 4 <= inend && outptr + 4 <= outend; inptr += 4)
    {
      uint32_t inval;

#if __BYTE_ORDER == __BIG_ENDIAN
      inval = bswap_32 (*(const uint32_t *) inptr);
#else
      inval = *(const uint32_t *) inptr;
#endif

      if (__glibc_unlikely (inval > 0x7fffffff))
	{
	  /* The value is too large.  We don't try transliteration here since
	     this is not an error because of the lack of possibilities to
	     represent the result.  This is a genuine bug in the input since
	     UCS4 does not allow such values.  */
	  if (irreversible == NULL)
	    /* We are transliterating, don't try to correct anything.  */
	    return __GCONV_ILLEGAL_INPUT;

	  if (flags & __GCONV_IGNORE_ERRORS)
	    {
	      /* Just ignore this character.  */
	      ++*irreversible;
	      continue;
	    }

	  *inptrp = inptr;
	  *outptrp = outptr;
	  return __GCONV_ILLEGAL_INPUT;
	}

      *((uint32_t *) outptr) = inval;
      outptr += sizeof (uint32_t);
    }

  *inptrp = inptr;
  *outptrp = outptr;

  /* Determine the status.  */
  if (*inptrp == inend)
    result = __GCONV_EMPTY_INPUT;
  else if (*inptrp + 4 > inend)
    result = __GCONV_INCOMPLETE_INPUT;
  else
    {
      assert (*outptrp + 4 > outend);
      result = __GCONV_FULL_OUTPUT;
    }

  return result;
}

#if !_STRING_ARCH_unaligned
static inline int
__attribute ((always_inline))
ucs4le_internal_loop_unaligned (struct __gconv_step *step,
				struct __gconv_step_data *step_data,
				const unsigned char **inptrp,
				const unsigned char *inend,
				unsigned char **outptrp,
				const unsigned char *outend,
				size_t *irreversible)
{
  int flags = step_data->__flags;
  const unsigned char *inptr = *inptrp;
  unsigned char *outptr = *outptrp;
  int result;

  for (; inptr + 4 <= inend && outptr + 4 <= outend; inptr += 4)
    {
      if (__glibc_unlikely (inptr[3] > 0x80))
	{
	  /* The value is too large.  We don't try transliteration here since
	     this is not an error because of the lack of possibilities to
	     represent the result.  This is a genuine bug in the input since
	     UCS4 does not allow such values.  */
	  if (irreversible == NULL)
	    /* We are transliterating, don't try to correct anything.  */
	    return __GCONV_ILLEGAL_INPUT;

	  if (flags & __GCONV_IGNORE_ERRORS)
	    {
	      /* Just ignore this character.  */
	      ++*irreversible;
	      continue;
	    }

	  *inptrp = inptr;
	  *outptrp = outptr;
	  return __GCONV_ILLEGAL_INPUT;
	}

# if __BYTE_ORDER == __BIG_ENDIAN
      outptr[3] = inptr[0];
      outptr[2] = inptr[1];
      outptr[1] = inptr[2];
      outptr[0] = inptr[3];
# else
      outptr[0] = inptr[0];
      outptr[1] = inptr[1];
      outptr[2] = inptr[2];
      outptr[3] = inptr[3];
# endif

      outptr += 4;
    }

  *inptrp = inptr;
  *outptrp = outptr;

  /* Determine the status.  */
  if (*inptrp == inend)
    result = __GCONV_EMPTY_INPUT;
  else if (*inptrp + 4 > inend)
    result = __GCONV_INCOMPLETE_INPUT;
  else
    {
      assert (*outptrp + 4 > outend);
      result = __GCONV_FULL_OUTPUT;
    }

  return result;
}
#endif


static inline int
__attribute ((always_inline))
ucs4le_internal_loop_single (struct __gconv_step *step,
			     struct __gconv_step_data *step_data,
			     const unsigned char **inptrp,
			     const unsigned char *inend,
			     unsigned char **outptrp,
			     const unsigned char *outend,
			     size_t *irreversible)
{
  mbstate_t *state = step_data->__statep;
  int flags = step_data->__flags;
  size_t cnt = state->__count & 7;

  while (*inptrp < inend && cnt < 4)
    state->__value.__wchb[cnt++] = *(*inptrp)++;

  if (__glibc_unlikely (cnt < 4))
    {
      /* Still not enough bytes.  Store the ones in the input buffer.  */
      state->__count &= ~7;
      state->__count |= cnt;

      return __GCONV_INCOMPLETE_INPUT;
    }

  if (__builtin_expect (((unsigned char *) state->__value.__wchb)[3] > 0x80,
			0))
    {
      /* The value is too large.  We don't try transliteration here since
	 this is not an error because of the lack of possibilities to
	 represent the result.  This is a genuine bug in the input since
	 UCS4 does not allow such values.  */
      if (!(flags & __GCONV_IGNORE_ERRORS))
	return __GCONV_ILLEGAL_INPUT;
    }
  else
    {
#if __BYTE_ORDER == __BIG_ENDIAN
      (*outptrp)[0] = state->__value.__wchb[3];
      (*outptrp)[1] = state->__value.__wchb[2];
      (*outptrp)[2] = state->__value.__wchb[1];
      (*outptrp)[3] = state->__value.__wchb[0];
#else
      (*outptrp)[0] = state->__value.__wchb[0];
      (*outptrp)[1] = state->__value.__wchb[1];
      (*outptrp)[2] = state->__value.__wchb[2];
      (*outptrp)[3] = state->__value.__wchb[3];
#endif

      *outptrp += 4;
    }

  /* Clear the state buffer.  */
  state->__count &= ~7;

  return __GCONV_OK;
}

#include <iconv/skeleton.c>


/* Convert from ISO 646-IRV to the internal (UCS4-like) format.  */
#define DEFINE_INIT		0
#define DEFINE_FINI		0
#define MIN_NEEDED_FROM		1
#define MIN_NEEDED_TO		4
#define FROM_DIRECTION		1
#define FROM_LOOP		ascii_internal_loop
#define TO_LOOP			ascii_internal_loop /* This is not used.  */
#define FUNCTION_NAME		__gconv_transform_ascii_internal
#define ONE_DIRECTION		1

#define MIN_NEEDED_INPUT	MIN_NEEDED_FROM
#define MIN_NEEDED_OUTPUT	MIN_NEEDED_TO
#define LOOPFCT			FROM_LOOP
#define BODY \
  {									      \
    if (__glibc_unlikely (*inptr > '\x7f'))				      \
      {									      \
	/* The value is too large.  We don't try transliteration here since   \
	   this is not an error because of the lack of possibilities to	      \
	   represent the result.  This is a genuine bug in the input since    \
	   ASCII does not allow such values.  */			      \
	STANDARD_FROM_LOOP_ERR_HANDLER (1);				      \
      }									      \
    else								      \
      {									      \
	/* It's an one byte sequence.  */				      \
	*((uint32_t *) outptr) = *inptr++;				      \
	outptr += sizeof (uint32_t);					      \
      }									      \
  }
#define LOOP_NEED_FLAGS
#include <iconv/loop.c>
#include <iconv/skeleton.c>


/* Convert from the internal (UCS4-like) format to ISO 646-IRV.  */
#define DEFINE_INIT		0
#define DEFINE_FINI		0
#define MIN_NEEDED_FROM		4
#define MIN_NEEDED_TO		1
#define FROM_DIRECTION		1
#define FROM_LOOP		internal_ascii_loop
#define TO_LOOP			internal_ascii_loop /* This is not used.  */
#define FUNCTION_NAME		__gconv_transform_internal_ascii
#define ONE_DIRECTION		1

#define MIN_NEEDED_INPUT	MIN_NEEDED_FROM
#define MIN_NEEDED_OUTPUT	MIN_NEEDED_TO
#define LOOPFCT			FROM_LOOP
#define BODY \
  {									      \
    if (__glibc_unlikely (*((const uint32_t *) inptr) > 0x7f))		      \
      {									      \
	UNICODE_TAG_HANDLER (*((const uint32_t *) inptr), 4);		      \
	STANDARD_TO_LOOP_ERR_HANDLER (4);				      \
      }									      \
    else								      \
      {									      \
	/* It's an one byte sequence.  */				      \
	*outptr++ = *((const uint32_t *) inptr);			      \
	inptr += sizeof (uint32_t);					      \
      }									      \
  }
#define LOOP_NEED_FLAGS
#include <iconv/loop.c>
#include <iconv/skeleton.c>


/* Convert from the internal (UCS4-like) format to UTF-8.  */
#define DEFINE_INIT		0
#define DEFINE_FINI		0
#define MIN_NEEDED_FROM		4
#define MIN_NEEDED_TO		1
#define MAX_NEEDED_TO		6
#define FROM_DIRECTION		1
#define FROM_LOOP		internal_utf8_loop
#define TO_LOOP			internal_utf8_loop /* This is not used.  */
#define FUNCTION_NAME		__gconv_transform_internal_utf8
#define ONE_DIRECTION		1

#define MIN_NEEDED_INPUT	MIN_NEEDED_FROM
#define MIN_NEEDED_OUTPUT	MIN_NEEDED_TO
#define MAX_NEEDED_OUTPUT	MAX_NEEDED_TO
#define LOOPFCT			FROM_LOOP
#define BODY \
  {									      \
    uint32_t wc = *((const uint32_t *) inptr);				      \
									      \
    if (__glibc_likely (wc < 0x80))					      \
      /* It's an one byte sequence.  */					      \
      *outptr++ = (unsigned char) wc;					      \
    else if (__glibc_likely (wc <= 0x7fffffff				      \
			     && (wc < 0xd800 || wc > 0xdfff)))		      \
      {									      \
	size_t step;							      \
	unsigned char *start;						      \
									      \
	for (step = 2; step < 6; ++step)				      \
	  if ((wc & (~(uint32_t)0 << (5 * step + 1))) == 0)		      \
	    break;							      \
									      \
	if (__glibc_unlikely (outptr + step > outend))			      \
	  {								      \
	    /* Too long.  */						      \
	    result = __GCONV_FULL_OUTPUT;				      \
	    break;							      \
	  }								      \
									      \
	start = outptr;							      \
	*outptr = (unsigned char) (~0xff >> step);			      \
	outptr += step;							      \
	do								      \
	  {								      \
	    start[--step] = 0x80 | (wc & 0x3f);				      \
	    wc >>= 6;							      \
	  }								      \
	while (step > 1);						      \
	start[0] |= wc;							      \
      }									      \
    else								      \
      {									      \
	STANDARD_TO_LOOP_ERR_HANDLER (4);				      \
      }									      \
									      \
    inptr += 4;								      \
  }
#define LOOP_NEED_FLAGS
#include <iconv/loop.c>
#include <iconv/skeleton.c>


/* Convert from UTF-8 to the internal (UCS4-like) format.  */
#define DEFINE_INIT		0
#define DEFINE_FINI		0
#define MIN_NEEDED_FROM		1
#define MAX_NEEDED_FROM		6
#define MIN_NEEDED_TO		4
#define FROM_DIRECTION		1
#define FROM_LOOP		utf8_internal_loop
#define TO_LOOP			utf8_internal_loop /* This is not used.  */
#define FUNCTION_NAME		__gconv_transform_utf8_internal
#define ONE_DIRECTION		1

#define MIN_NEEDED_INPUT	MIN_NEEDED_FROM
#define MAX_NEEDED_INPUT	MAX_NEEDED_FROM
#define MIN_NEEDED_OUTPUT	MIN_NEEDED_TO
#define LOOPFCT			FROM_LOOP
#define BODY \
  {									      \
    /* Next input byte.  */						      \
    uint32_t ch = *inptr;						      \
									      \
    if (__glibc_likely (ch < 0x80))					      \
      {									      \
	/* One byte sequence.  */					      \
	++inptr;							      \
      }									      \
    else								      \
      {									      \
	uint_fast32_t cnt;						      \
	uint_fast32_t i;						      \
									      \
	if (ch >= 0xc2 && ch < 0xe0)					      \
	  {								      \
	    /* We expect two bytes.  The first byte cannot be 0xc0 or 0xc1,   \
	       otherwise the wide character could have been represented	      \
	       using a single byte.  */					      \
	    cnt = 2;							      \
	    ch &= 0x1f;							      \
	  }								      \
	else if (__glibc_likely ((ch & 0xf0) == 0xe0))			      \
	  {								      \
	    /* We expect three bytes.  */				      \
	    cnt = 3;							      \
	    ch &= 0x0f;							      \
	  }								      \
	else if (__glibc_likely ((ch & 0xf8) == 0xf0))			      \
	  {								      \
	    /* We expect four bytes.  */				      \
	    cnt = 4;							      \
	    ch &= 0x07;							      \
	  }								      \
	else if (__glibc_likely ((ch & 0xfc) == 0xf8))			      \
	  {								      \
	    /* We expect five bytes.  */				      \
	    cnt = 5;							      \
	    ch &= 0x03;							      \
	  }								      \
	else if (__glibc_likely ((ch & 0xfe) == 0xfc))			      \
	  {								      \
	    /* We expect six bytes.  */					      \
	    cnt = 6;							      \
	    ch &= 0x01;							      \
	  }								      \
	else								      \
	  {								      \
	    /* Search the end of this ill-formed UTF-8 character.  This	      \
	       is the next byte with (x & 0xc0) != 0x80.  */		      \
	    i = 0;							      \
	    do								      \
	      ++i;							      \
	    while (inptr + i < inend					      \
		   && (*(inptr + i) & 0xc0) == 0x80			      \
		   && i < 5);						      \
									      \
	  errout:							      \
	    STANDARD_FROM_LOOP_ERR_HANDLER (i);				      \
	  }								      \
									      \
	if (__glibc_unlikely (inptr + cnt > inend))			      \
	  {								      \
	    /* We don't have enough input.  But before we report that check   \
	       that all the bytes are correct.  */			      \
	    for (i = 1; inptr + i < inend; ++i)				      \
	      if ((inptr[i] & 0xc0) != 0x80)				      \
		break;							      \
									      \
	    if (__glibc_likely (inptr + i == inend))			      \
	      {								      \
		result = __GCONV_INCOMPLETE_INPUT;			      \
		break;							      \
	      }								      \
									      \
	    goto errout;						      \
	  }								      \
									      \
	/* Read the possible remaining bytes.  */			      \
	for (i = 1; i < cnt; ++i)					      \
	  {								      \
	    uint32_t byte = inptr[i];					      \
									      \
	    if ((byte & 0xc0) != 0x80)					      \
	      /* This is an illegal encoding.  */			      \
	      break;							      \
									      \
	    ch <<= 6;							      \
	    ch |= byte & 0x3f;						      \
	  }								      \
									      \
	/* If i < cnt, some trail byte was not >= 0x80, < 0xc0.		      \
	   If cnt > 2 and ch < 2^(5*cnt-4), the wide character ch could	      \
	   have been represented with fewer than cnt bytes.  */		      \
	if (i < cnt || (cnt > 2 && (ch >> (5 * cnt - 4)) == 0)		      \
	    /* Do not accept UTF-16 surrogates.  */			      \
	    || (ch >= 0xd800 && ch <= 0xdfff))				      \
	  {								      \
	    /* This is an illegal encoding.  */				      \
	    goto errout;						      \
	  }								      \
									      \
	inptr += cnt;							      \
      }									      \
									      \
    /* Now adjust the pointers and store the result.  */		      \
    *((uint32_t *) outptr) = ch;					      \
    outptr += sizeof (uint32_t);					      \
  }
#define LOOP_NEED_FLAGS

#define STORE_REST \
  {									      \
    /* We store the remaining bytes while converting them into the UCS4	      \
       format.  We can assume that the first byte in the buffer is	      \
       correct and that it requires a larger number of bytes than there	      \
       are in the input buffer.  */					      \
    wint_t ch = **inptrp;						      \
    size_t cnt, r;							      \
									      \
    state->__count = inend - *inptrp;					      \
									      \
    assert (ch != 0xc0 && ch != 0xc1);					      \
    if (ch >= 0xc2 && ch < 0xe0)					      \
      {									      \
	/* We expect two bytes.  The first byte cannot be 0xc0 or	      \
	   0xc1, otherwise the wide character could have been		      \
	   represented using a single byte.  */				      \
	cnt = 2;							      \
	ch &= 0x1f;							      \
      }									      \
    else if (__glibc_likely ((ch & 0xf0) == 0xe0))			      \
      {									      \
	/* We expect three bytes.  */					      \
	cnt = 3;							      \
	ch &= 0x0f;							      \
      }									      \
    else if (__glibc_likely ((ch & 0xf8) == 0xf0))			      \
      {									      \
	/* We expect four bytes.  */					      \
	cnt = 4;							      \
	ch &= 0x07;							      \
      }									      \
    else if (__glibc_likely ((ch & 0xfc) == 0xf8))			      \
      {									      \
	/* We expect five bytes.  */					      \
	cnt = 5;							      \
	ch &= 0x03;							      \
      }									      \
    else								      \
      {									      \
	/* We expect six bytes.  */					      \
	cnt = 6;							      \
	ch &= 0x01;							      \
      }									      \
									      \
    /* The first byte is already consumed.  */				      \
    r = cnt - 1;							      \
    while (++(*inptrp) < inend)						      \
      {									      \
	ch <<= 6;							      \
	ch |= **inptrp & 0x3f;						      \
	--r;								      \
      }									      \
									      \
    /* Shift for the so far missing bytes.  */				      \
    ch <<= r * 6;							      \
									      \
    /* Store the number of bytes expected for the entire sequence.  */	      \
    state->__count |= cnt << 8;						      \
									      \
    /* Store the value.  */						      \
    state->__value.__wch = ch;						      \
  }

#define UNPACK_BYTES \
  {									      \
    static const unsigned char inmask[5] = { 0xc0, 0xe0, 0xf0, 0xf8, 0xfc };  \
    wint_t wch = state->__value.__wch;					      \
    size_t ntotal = state->__count >> 8;				      \
									      \
    inlen = state->__count & 255;					      \
									      \
    bytebuf[0] = inmask[ntotal - 2];					      \
									      \
    do									      \
      {									      \
	if (--ntotal < inlen)						      \
	  bytebuf[ntotal] = 0x80 | (wch & 0x3f);			      \
	wch >>= 6;							      \
      }									      \
    while (ntotal > 1);							      \
									      \
    bytebuf[0] |= wch;							      \
  }

#define CLEAR_STATE \
  state->__count = 0


#include <iconv/loop.c>
#include <iconv/skeleton.c>


/* Convert from UCS2 to the internal (UCS4-like) format.  */
#define DEFINE_INIT		0
#define DEFINE_FINI		0
#define MIN_NEEDED_FROM		2
#define MIN_NEEDED_TO		4
#define FROM_DIRECTION		1
#define FROM_LOOP		ucs2_internal_loop
#define TO_LOOP			ucs2_internal_loop /* This is not used.  */
#define FUNCTION_NAME		__gconv_transform_ucs2_internal
#define ONE_DIRECTION		1

#define MIN_NEEDED_INPUT	MIN_NEEDED_FROM
#define MIN_NEEDED_OUTPUT	MIN_NEEDED_TO
#define LOOPFCT			FROM_LOOP
#define BODY \
  {									      \
    uint16_t u1 = get16 (inptr);					      \
									      \
    if (__glibc_unlikely (u1 >= 0xd800 && u1 < 0xe000))			      \
      {									      \
	/* Surrogate characters in UCS-2 input are not valid.  Reject	      \
	   them.  (Catching this here is not security relevant.)  */	      \
	STANDARD_FROM_LOOP_ERR_HANDLER (2);				      \
      }									      \
									      \
    *((uint32_t *) outptr) = u1;					      \
    outptr += sizeof (uint32_t);					      \
    inptr += 2;								      \
  }
#define LOOP_NEED_FLAGS
#include <iconv/loop.c>
#include <iconv/skeleton.c>


/* Convert from the internal (UCS4-like) format to UCS2.  */
#define DEFINE_INIT		0
#define DEFINE_FINI		0
#define MIN_NEEDED_FROM		4
#define MIN_NEEDED_TO		2
#define FROM_DIRECTION		1
#define FROM_LOOP		internal_ucs2_loop
#define TO_LOOP			internal_ucs2_loop /* This is not used.  */
#define FUNCTION_NAME		__gconv_transform_internal_ucs2
#define ONE_DIRECTION		1

#define MIN_NEEDED_INPUT	MIN_NEEDED_FROM
#define MIN_NEEDED_OUTPUT	MIN_NEEDED_TO
#define LOOPFCT			FROM_LOOP
#define BODY \
  {									      \
    uint32_t val = *((const uint32_t *) inptr);				      \
									      \
    if (__glibc_unlikely (val >= 0x10000))				      \
      {									      \
	UNICODE_TAG_HANDLER (val, 4);					      \
	STANDARD_TO_LOOP_ERR_HANDLER (4);				      \
      }									      \
    else if (__glibc_unlikely (val >= 0xd800 && val < 0xe000))		      \
      {									      \
	/* Surrogate characters in UCS-4 input are not valid.		      \
	   We must catch this, because the UCS-2 output might be	      \
	   interpreted as UTF-16 by other programs.  If we let		      \
	   surrogates pass through, attackers could make a security	      \
	   hole exploit by synthesizing any desired plane 1-16		      \
	   character.  */						      \
	result = __GCONV_ILLEGAL_INPUT;					      \
	if (! ignore_errors_p ())					      \
	  break;							      \
	inptr += 4;							      \
	++*irreversible;						      \
	continue;							      \
      }									      \
    else								      \
      {									      \
	put16 (outptr, val);						      \
	outptr += sizeof (uint16_t);					      \
	inptr += 4;							      \
      }									      \
  }
#define LOOP_NEED_FLAGS
#include <iconv/loop.c>
#include <iconv/skeleton.c>


/* Convert from UCS2 in other endianness to the internal (UCS4-like) format. */
#define DEFINE_INIT		0
#define DEFINE_FINI		0
#define MIN_NEEDED_FROM		2
#define MIN_NEEDED_TO		4
#define FROM_DIRECTION		1
#define FROM_LOOP		ucs2reverse_internal_loop
#define TO_LOOP			ucs2reverse_internal_loop/* This is not used.*/
#define FUNCTION_NAME		__gconv_transform_ucs2reverse_internal
#define ONE_DIRECTION		1

#define MIN_NEEDED_INPUT	MIN_NEEDED_FROM
#define MIN_NEEDED_OUTPUT	MIN_NEEDED_TO
#define LOOPFCT			FROM_LOOP
#define BODY \
  {									      \
    uint16_t u1 = bswap_16 (get16 (inptr));				      \
									      \
    if (__glibc_unlikely (u1 >= 0xd800 && u1 < 0xe000))			      \
      {									      \
	/* Surrogate characters in UCS-2 input are not valid.  Reject	      \
	   them.  (Catching this here is not security relevant.)  */	      \
	if (! ignore_errors_p ())					      \
	  {								      \
	    result = __GCONV_ILLEGAL_INPUT;				      \
	    break;							      \
	  }								      \
	inptr += 2;							      \
	++*irreversible;						      \
	continue;							      \
      }									      \
									      \
    *((uint32_t *) outptr) = u1;					      \
    outptr += sizeof (uint32_t);					      \
    inptr += 2;								      \
  }
#define LOOP_NEED_FLAGS
#include <iconv/loop.c>
#include <iconv/skeleton.c>


/* Convert from the internal (UCS4-like) format to UCS2 in other endianness. */
#define DEFINE_INIT		0
#define DEFINE_FINI		0
#define MIN_NEEDED_FROM		4
#define MIN_NEEDED_TO		2
#define FROM_DIRECTION		1
#define FROM_LOOP		internal_ucs2reverse_loop
#define TO_LOOP			internal_ucs2reverse_loop/* This is not used.*/
#define FUNCTION_NAME		__gconv_transform_internal_ucs2reverse
#define ONE_DIRECTION		1

#define MIN_NEEDED_INPUT	MIN_NEEDED_FROM
#define MIN_NEEDED_OUTPUT	MIN_NEEDED_TO
#define LOOPFCT			FROM_LOOP
#define BODY \
  {									      \
    uint32_t val = *((const uint32_t *) inptr);				      \
    if (__glibc_unlikely (val >= 0x10000))				      \
      {									      \
	UNICODE_TAG_HANDLER (val, 4);					      \
	STANDARD_TO_LOOP_ERR_HANDLER (4);				      \
      }									      \
    else if (__glibc_unlikely (val >= 0xd800 && val < 0xe000))		      \
      {									      \
	/* Surrogate characters in UCS-4 input are not valid.		      \
	   We must catch this, because the UCS-2 output might be	      \
	   interpreted as UTF-16 by other programs.  If we let		      \
	   surrogates pass through, attackers could make a security	      \
	   hole exploit by synthesizing any desired plane 1-16		      \
	   character.  */						      \
	if (! ignore_errors_p ())					      \
	  {								      \
	    result = __GCONV_ILLEGAL_INPUT;				      \
	    break;							      \
	  }								      \
	inptr += 4;							      \
	++*irreversible;						      \
	continue;							      \
      }									      \
    else								      \
      {									      \
	put16 (outptr, bswap_16 (val));					      \
	outptr += sizeof (uint16_t);					      \
	inptr += 4;							      \
      }									      \
  }
#define LOOP_NEED_FLAGS
#include <iconv/loop.c>
#include <iconv/skeleton.c>