File: tidy.h

package info (click to toggle)
tidy-html5 2%3A5.6.0-11
  • links: PTS, VCS
  • area: main
  • in suites: bookworm, bullseye, sid
  • size: 5,512 kB
  • sloc: ansic: 40,477; ruby: 841; sh: 293; makefile: 30; cpp: 30
file content (2207 lines) | stat: -rw-r--r-- 100,304 bytes parent folder | download | duplicates (2)
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
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
#ifndef __TIDY_H__
#define __TIDY_H__

/***************************************************************************//**
 * @file
 * Defines HTML Tidy public API implemented by LibTidy.
 *
 * This public interface provides the entire public API for LibTidy, and
 * is the sole interface that you should use when implementing LibTidy in
 * your own applications.
 *
 * See tidy.c as an example application implementing the public API.
 *
 * This API is const-correct and doesn't explicitly depend on any globals.
 * Thus, thread-safety may be introduced without changing the interface.
 *
 * The API limits all exposure to internal structures and provides only
 * accessors that return simple types such as C strings and integers, which
 * makes it quite suitable for integration with any number of other languages.
 *
 * @author  Dave Raggett [dsr@w3.org]
 * @author  HTACG, et al (consult git log)
 * 
 * @remarks The contributing author(s) would like to thank all those who 
 *          helped with testing, bug fixes and suggestions for improvements.
 *          This wouldn't have been possible without your help.
 *
 * @copyright
 *     Copyright (c) 1998-2017 World Wide Web Consortium (Massachusetts
 *     Institute of Technology, European Research Consortium for Informatics
 *     and Mathematics, Keio University).
 * @par
 *     All Rights Reserved.
 * @par
 *     This software and documentation is provided "as is," and the copyright 
 *     holders and contributing author(s) make no representations or warranties,
 *     express or implied, including but not limited to, warranties of 
 *     merchantability or fitness for any particular purpose or that the use of
 *     the software or documentation will not infringe any third party patents,
 *     copyrights, trademarks or other rights.
 *     @par
 *     The copyright holders and contributing author(s) will not be held liable
 *     for any direct, indirect, special or consequential damages arising out of
 *     any use of the software or documentation, even if advised of the
 *     possibility of such damage.
 * @par
 *     Permission is hereby granted to use, copy, modify, and distribute this
 *     source code, or portions hereof, documentation and executables, for any
 *     purpose, without fee, subject to the following restrictions:
 * @par
 *        1. The origin of this source code must not be misrepresented.
 *        2. Altered versions must be plainly marked as such and must not be
 *           misrepresented as being the original source.
 *        3. This Copyright notice may not be removed or altered from any source
 *           or altered source distribution.
 * @par
 *     The copyright holders and contributing author(s) specifically permit,
 *     without fee, and encourage the use of this source code as a component for
 *     supporting the Hypertext Markup Language in commercial products. If you
 *     use this source code in a product, acknowledgment is not required but
 *     would be appreciated.
 *
 * @date Created 2001-05-20 by Charles Reitzel
 * @date Updated 2002-07-01 by Charles Reitzel - 1st Implementation
 * @date Updated 2015-06-09 by Geoff R. McLane - Add more doxygen syntax
 * @date Additional updates: consult git log
 ******************************************************************************/

#include "tidyplatform.h"
#include "tidyenum.h"

#ifdef __cplusplus
extern "C" {
#endif
    
/***************************************************************************//**
 ** @defgroup internal_api Internal API
 ** The Internal API is used exclusively within LibTidy. If you are an
 ** HTML Tidy developer, then the internals API will be of especial
 ** importance to you.
 **
 ** @note Always check first to determine whether or not an internal API
 **       representation exists for a public API function before invoking a
 **       public API function internally. In most cases, the public API
 **       functions simply call an internal function.
 ** - - -
 ** @note This documentation _is not_ a substitute for browsing the source
 **       code. Although the public API is fairly well documented, the
 **       internal API is a very long, very slow, work-in-progress.
 ******************************************************************************/

/***************************************************************************//**
 ** @defgroup public_api External Public API
 ** The Public API is the API that LibTidy programmers must access in order 
 ** to harness HTML Tidy as a library. The API limits all exposure to internal
 ** structures and provides only accessors that return simple types such as
 ** C strings and integers, which makes it quite suitable for integration with
 ** any number of other languages.
 ** @{
 ******************************************************************************/


/* MARK: - Opaque Types */
/***************************************************************************//**
 ** @defgroup Opaque Opaque Types
 **
 ** Instances of these types are returned by LibTidy API functions, however
 ** they are opaque; you cannot see into them, and must use accessor functions
 ** to access the contents. This ensures that interfacing to LibTidy remains
 ** as universal as possible.
 **
 ** @note Internally LibTidy developers will cast these to internal
 **       implementation types with access to all member fields.
 ** @{
 ******************************************************************************/

/** @struct TidyDoc
 ** Instances of this represent a Tidy document, which encapsulates everything
 ** there is to know about a single Tidy session. Many of the API functions
 ** return instance of TidyDoc, or expect instances as parameters.
 */

/** @struct TidyOption
 ** Instances of this represent a Tidy configuration option, which contains
 ** useful data about these options. Functions related to configuration options
 ** return or accept instances of this type.
 */

/** @struct TidyNode
 ** Single nodes of a TidyDocument are represented by this datatype. It can be
 ** returned by various API functions, or accepted as a function argument.
 */

/** @struct TidyAttr
 ** Attributes of a TidyNode are represented by this data type. The public API
 ** functions related to attributes work with this type.
 */

/** @struct TidyMessage
 ** Instances of this type represent messages generated by Tidy in reference
 ** to your document. This API is available in some of Tidy's message callback
 ** functions.
*/

/** @struct TidyMessageArgument
 ** Instances of this type represent the arguments that compose part of the
 ** message represented by TidyMessage. These arguments have an API to query
 ** information about them.
*/

/* Prevent Doxygen from listing these as functions. */
#ifndef DOXYGEN_SHOULD_SKIP_THIS

opaque_type( TidyDoc );
opaque_type( TidyOption );
opaque_type( TidyNode );
opaque_type( TidyAttr );
opaque_type( TidyMessage );
opaque_type( TidyMessageArgument );

#endif


/** @} end Opaque group */
/* MARK: - Memory Allocation */
/***************************************************************************//**
 ** @defgroup Memory Memory Allocation
 **
 ** Tidy can use a user-provided allocator for all memory allocations.  If this
 ** allocator is not provided, then a default allocator is used which simply
 ** wraps standard C malloc()/free() calls. These wrappers call the panic()
 ** function upon any failure. The default panic function prints an out of
 ** memory message to **stderr**, and calls `exit(2)`.
 **
 ** For applications in which it is unacceptable to abort in the case of memory
 ** allocation, then the panic function can be replaced with one which
 ** `longjmps()` out of the LibTidy code. For this to clean up completely, you
 ** should be careful not to use any Tidy methods that open files as these will
 ** not be closed before `panic()` is called.
 **
 ** Calling the `xxxWithAllocator()` family (`tidyCreateWithAllocator`,
 ** `tidyBufInitWithAllocator`, `tidyBufAllocWithAllocator`) allow setting
 ** custom allocators.
 **
 ** All parts of the document use the same allocator. Calls that require a
 ** user-provided buffer can optionally use a different allocator.
 **
 ** For reference in designing a plug-in allocator, most allocations made by
 ** LibTidy are less than 100 bytes, corresponding to attribute names and
 ** values, etc.
 **
 ** There is also an additional class of much larger allocations which are where
 ** most of the data from the lexer is stored. It is not currently possible to
 ** use a separate allocator for the lexer; this would be a useful extension.
 **
 ** In general, approximately 1/3rd of the memory used by LibTidy is freed
 ** during the parse, so if memory usage is an issue then an allocator that can
 ** reuse this memory is a good idea.
 **
 ** **To create your own allocator, do something like the following:**
 ** @code{.c}
 ** typedef struct _MyAllocator {
 **    TidyAllocator base;
 **    // ...other custom allocator state...
 ** } MyAllocator;
 **
 ** void* MyAllocator_alloc(TidyAllocator *base, void *block, size_t nBytes) {
 **     MyAllocator *self = (MyAllocator*)base;
 **     // ...
 ** }
 ** // etc.
 **
 ** static const TidyAllocatorVtbl MyAllocatorVtbl = {
 **     MyAllocator_alloc,
 **     MyAllocator_realloc,
 **     MyAllocator_free,
 **     MyAllocator_panic
 ** };
 **
 ** myAllocator allocator;
 ** TidyDoc doc;
 **
 ** allocator.base.vtbl = &MyAllocatorVtbl;
 ** //...initialise allocator specific state...
 ** doc = tidyCreateWithAllocator(&allocator);
 ** @endcode
 **
 ** Although this looks slightly long-winded, the advantage is that to create a
 ** custom allocator you simply need to set the vtbl pointer correctly. The vtbl
 ** itself can reside in static/global data, and hence does not need to be
 ** initialised each time an allocator is created, and furthermore the memory
 ** is shared amongst all created allocators.
 **
 ** @{
 ******************************************************************************/

/* Forward declarations and typedefs. */
struct _TidyAllocatorVtbl;
struct _TidyAllocator;

typedef struct _TidyAllocatorVtbl TidyAllocatorVtbl;
typedef struct _TidyAllocator TidyAllocator;

    
/** Tidy's built-in default allocator. */
struct _TidyAllocator {
    const TidyAllocatorVtbl *vtbl; /**< The allocator's function table. */
};


/** This structure is the function table for an allocator. Note that all
    functions in this table must be provided. */
struct _TidyAllocatorVtbl
{
/* Doxygen has no idea how to parse these. */
#ifndef DOXYGEN_SHOULD_SKIP_THIS
    void* (TIDY_CALL *alloc)( TidyAllocator *self, size_t nBytes );
    void* (TIDY_CALL *realloc)(TidyAllocator *self, void *block, size_t nBytes );
    void (TIDY_CALL *free)(TidyAllocator *self, void *block);
    void (TIDY_CALL *panic)(TidyAllocator *self, ctmbstr msg);
#else
    /** Called to allocate a block of nBytes of memory */
    void* *alloc(TidyAllocator *self, /**< The TidyAllocator to use to alloc memory. */
                 size_t nBytes        /**< The number of bytes to allocate. */
                 );

    /** Called to resize (grow, in general) a block of memory.
        Must support being called with `NULL`. */
    void* *realloc(TidyAllocator *self, /**< The TidyAllocator to use to realloc memory. */
                   void *block,         /**< The pointer to the existing block. */
                   size_t nBytes        /**< The number of bytes to allocate. */
                   );
    
    /** Called to free a previously allocated block of memory.
     */
    void *free(TidyAllocator *self,  /**< The TidyAllocator to use to free memory. */
               void *block           /**< The block to free. */
               );

    /** Called when a panic condition is detected. Must support `block == NULL`.
        This function is not called if either alloc() or realloc() fails; it is
        up to the allocator to do this. Currently this function can only be
        called if an error is detected in the tree integrity via the internal
        function CheckNodeIntegrity(). This is a situation that can only arise
        in the case of a programming error in LibTidy. You can turn off node
        integrity checking by defining the constant `NO_NODE_INTEGRITY_CHECK` 
        during the build.
    **/
    void *panic(TidyAllocator *self,  /**< The TidyAllocator to use to panic. */
                ctmbstr msg           /**< The panic message. */
                );
#endif /* Doxygen Fix */
};


/** Callback for `malloc` replacement */
typedef void* (TIDY_CALL *TidyMalloc)( size_t len );

/** Callback for `realloc` replacement */
typedef void* (TIDY_CALL *TidyRealloc)( void* buf, size_t len );

/** Callback for `free` replacement */
typedef void  (TIDY_CALL *TidyFree)( void* buf );

/** Callback for out of memory panic state */
typedef void  (TIDY_CALL *TidyPanic)( ctmbstr mssg );


/** Give Tidy a `malloc()` replacement */
TIDY_EXPORT Bool TIDY_CALL tidySetMallocCall( TidyMalloc fmalloc );

/** Give Tidy a `realloc()` replacement */
TIDY_EXPORT Bool TIDY_CALL tidySetReallocCall( TidyRealloc frealloc );

/** Give Tidy a `free()` replacement */
TIDY_EXPORT Bool TIDY_CALL tidySetFreeCall( TidyFree ffree );

/** Give Tidy an "out of memory" handler */
TIDY_EXPORT Bool TIDY_CALL tidySetPanicCall( TidyPanic fpanic );


/** @} end Memory group */
/* MARK: - Basic Operations */
/***************************************************************************//**
 ** @defgroup Basic Basic Operations
 **
 ** For an excellent example of how to invoke LibTidy, please consult
 ** `console/tidy.c:main()` for in-depth implementation details. A simplified
 ** example can be seen on our site: http://www.html-tidy.org/developer/
 **
 ** @{
 ******************************************************************************/

/** @name Instantiation and Destruction
 ** @{
 */
    
/** The primary creation of a document instance. Instances of a TidyDoc are used
 ** throughout the API as a token to represent a particular document. You must
 ** create at least one TidyDoc instance to initialize the library and begin
 ** interaction with the API. When done using a TidyDoc instance, be sure to
 ** `tidyRelease(myTidyDoc);` in order to free related memory.
 ** @result Returns a TidyDoc instance.
 */
TIDY_EXPORT TidyDoc TIDY_CALL     tidyCreate(void);

/** Create a document supplying your own, custom TidyAllocator instead of using
 ** the built-in default. See the @ref Memory module if you want to create and
 ** use your own allocator.
 ** @param allocator The allocator to use for creating the document.
 ** @result Returns a TidyDoc instance.
 */
TIDY_EXPORT TidyDoc TIDY_CALL     tidyCreateWithAllocator(TidyAllocator *allocator);

/** Free all memory and release the TidyDoc. The TidyDoc can not be used after 
 ** this call.
 ** @param tdoc The TidyDoc to free.
 */
TIDY_EXPORT void TIDY_CALL        tidyRelease(TidyDoc tdoc);

    
/** @}
 ** @name Host Application Data
 ** @{
 */
   
 
/** Allows the host application to store a chunk of data with each TidyDoc
 ** instance. This can be useful for callbacks, such as saving a reference to
 ** `self` within the document.
 */
TIDY_EXPORT void TIDY_CALL        tidySetAppData(TidyDoc tdoc,  /**< The document in which to store the data. */
                                                 void* appData  /**< The pointer to a block of data to store. */
                                                 );

/** Returns the data previously stored with `tidySetAppData()`.
 ** @param tdoc  document where data has been stored.
 ** @result The pointer to the data block previously stored. 
 */
TIDY_EXPORT void* TIDY_CALL       tidyGetAppData(TidyDoc tdoc);

    
/** @}
 ** @name LibTidy Version Information
 ** @{
 */

    
/** Get the release date for the current library.
 ** @result The string representing the release date.
 */
TIDY_EXPORT ctmbstr TIDY_CALL     tidyReleaseDate(void);

/** Get the version number for the current library.
 ** @result The string representing the version number.
 */
TIDY_EXPORT ctmbstr TIDY_CALL     tidyLibraryVersion(void);

/** Get the platform for which Tidy was built.
 ** @result The string representing the version number.
 */
TIDY_EXPORT ctmbstr TIDY_CALL     tidyPlatform(void);

    
/** @}
 ** @name Diagnostics and Repair
 ** @{
 */

    
/** Get status of current document.
 ** @param tdoc An instance of a TidyDoc to query.
 ** @result Returns the highest of `2` indicating that errors were present in
 **         the document, `1` indicating warnings, and `0` in the case of
 **         everything being okay.
 */
TIDY_EXPORT int TIDY_CALL         tidyStatus( TidyDoc tdoc );

/** Gets the version of HTML that was output, as an integer, times 100. For
 ** example, HTML5 will return 500; HTML4.0.1 will return 401.
 ** @param tdoc An instance of a TidyDoc to query.
 ** @result Returns the HTML version number (x100).
 */
TIDY_EXPORT int TIDY_CALL         tidyDetectedHtmlVersion( TidyDoc tdoc );

/** Indicates whether the output document is or isn't XHTML.
 ** @param tdoc An instance of a TidyDoc to query.
 ** @result Returns `yes` if the document is an XHTML type.
 */
TIDY_EXPORT Bool TIDY_CALL        tidyDetectedXhtml( TidyDoc tdoc );

/** Indicates whether or not the input document was XML. If TidyXml tags is
 ** true, or there was an XML declaration in the input document, then this
 ** function will return yes.
 ** @param tdoc An instance of a TidyDoc to query.
 ** @result Returns `yes` if the input document was XML.
 */
TIDY_EXPORT Bool TIDY_CALL        tidyDetectedGenericXml( TidyDoc tdoc );

/** Indicates the number of TidyError messages that were generated. For any
 ** value greater than `0`, output is suppressed unless TidyForceOutput is set.
 ** @param tdoc An instance of a TidyDoc to query.
 ** @result Returns the number of TidyError messages that were generated.
 */
TIDY_EXPORT uint TIDY_CALL        tidyErrorCount( TidyDoc tdoc );

/** Indicates the number of TidyWarning messages that were generated.
 ** @param tdoc An instance of a TidyDoc to query.
 ** @result Returns the number of TidyWarning messages that were generated.
 */
TIDY_EXPORT uint TIDY_CALL        tidyWarningCount( TidyDoc tdoc );

/** Indicates the number of TidyAccess messages that were generated.
 ** @param tdoc An instance of a TidyDoc to query.
 ** @result Returns the number of TidyAccess messages that were generated.
 */
TIDY_EXPORT uint TIDY_CALL        tidyAccessWarningCount( TidyDoc tdoc );

/** Indicates the number of configuration error messages that were generated.
 ** @param tdoc An instance of a TidyDoc to query.
 ** @result Returns the number of configuration error messages that were
 **         generated.
 */
TIDY_EXPORT uint TIDY_CALL        tidyConfigErrorCount( TidyDoc tdoc );

/** Write more complete information about errors to current error sink.
 ** @param tdoc An instance of a TidyDoc to query.
 */
TIDY_EXPORT void TIDY_CALL        tidyErrorSummary( TidyDoc tdoc );

/** Write more general information about markup to current error sink.
 ** @param tdoc An instance of a TidyDoc to query.
 */
TIDY_EXPORT void TIDY_CALL        tidyGeneralInfo( TidyDoc tdoc );


/** @}
 ** @name Configuration, File, and Encoding Operations
 ** @{
 */
    
    
/** Load an ASCII Tidy configuration file and set the configuration per its
 ** contents.
 ** @result Returns 0 upon success, or any other value if there was an error.
 */
TIDY_EXPORT int TIDY_CALL         tidyLoadConfig(TidyDoc tdoc,      /**< The TidyDoc to which to apply the configuration. */
                                                 ctmbstr configFile /**< The complete path to the file to load. */
                                                 );

/** Load a Tidy configuration file with the specified character encoding, and
 ** set the configuration per its contents. 
 ** @result Returns 0 upon success, or any other value if there was an error.
 */
TIDY_EXPORT int TIDY_CALL         tidyLoadConfigEnc(TidyDoc tdoc,       /**< The TidyDoc to which to apply the configuration. */
                                                    ctmbstr configFile, /**< The complete path to the file to load. */
                                                    ctmbstr charenc     /**< The encoding to use. See the _enc2iana struct for valid values. */
                                                    );

/** Determine whether or not a particular file exists. On Unix systems, the use
 ** of the tilde to represent the user's home directory is supported.
 ** @result Returns `yes` or `no`, indicating whether or not the file exists.
 */
TIDY_EXPORT Bool TIDY_CALL        tidyFileExists(TidyDoc tdoc,     /**< The TidyDoc on whose behalf you are checking. */
                                                 ctmbstr filename  /**< The path to the file whose existence you wish to check. */
                                                 );


/** Set the input/output character encoding for parsing markup. Valid values
 ** include `ascii`, `latin1`, `raw`, `utf8`, `iso2022`, `mac`, `win1252`,
 ** `utf16le`, `utf16be`, `utf16`, `big5`, and `shiftjis`. These values are not
 ** case sensitive.
 ** @note This is the same as using TidySetInCharEncoding() and 
 **       TidySetOutCharEncoding() to set the same value.
 ** @result Returns 0 upon success, or a system standard error number `EINVAL`.
 */
TIDY_EXPORT int TIDY_CALL         tidySetCharEncoding(TidyDoc tdoc,  /**< The TidyDoc for which you are setting the encoding. */
                                                      ctmbstr encnam /**< The encoding name as described above. */
                                                      );

/** Set the input encoding for parsing markup.  Valid values include `ascii`, 
 ** `latin1`, `raw`, `utf8`, `iso2022`, `mac`, `win1252`, `utf16le`, `utf16be`,
 ** `utf16`, `big5`, and `shiftjis`. These values are not case sensitive.
 ** @result Returns 0 upon success, or a system standard error number `EINVAL`.
 */
TIDY_EXPORT int TIDY_CALL         tidySetInCharEncoding(TidyDoc tdoc,  /**< The TidyDoc for which you are setting the encoding. */
                                                        ctmbstr encnam /**< The encoding name as described above. */
                                                        );

/** Set the input encoding for writing markup.  Valid values include `ascii`,
 ** `latin1`, `raw`, `utf8`, `iso2022`, `mac`, `win1252`, `utf16le`, `utf16be`,
 ** `utf16`, `big5`, and `shiftjis`. These values are not case sensitive.
 ** @result Returns 0 upon success, or a system standard error number `EINVAL`.
 */
TIDY_EXPORT int TIDY_CALL         tidySetOutCharEncoding(TidyDoc tdoc,  /**< The TidyDoc for which you are setting the encoding. */
                                                         ctmbstr encnam /**< The encoding name as described above. */
                                                         );


/** @} */
/** @} end Basic group */
/* MARK: - Configuration Options */
/***************************************************************************//**
 ** @defgroup Configuration Configuration Options
 **
 ** Functions for getting and setting Tidy configuration options.
 **
 ** @note In general, you should expect that options you set should stay set.
 **       This isn't always the case, though, because Tidy will adjust options
 **       for internal use during the lexing, parsing, cleaning, and printing
 **       phases, but will restore them after the printing process. If you
 **       require access to user configuration values at any time between the
 **       tidyParseXXX() process and the tidySaveXXX() process, make sure to
 **       keep your own copy.
 ** @{
 ******************************************************************************/

/** @name Option Callback Functions
 ** @{
 */

/** This typedef represents the required signature for your provided callback
 ** function should you wish to register one with tidySetOptionCallback().
 ** Your callback function will be provided with the following parameters.
 ** Note that this is deprecated and you should instead migrate to
 ** tidySetConfigCallback().
 ** @param option The option name that was provided.
 ** @param value The option value that was provided
 ** @return Your callback function will return `yes` if it handles the provided
 **         option, or `no` if it does not. In the latter case, Tidy will issue
 **         an unknown configuration option error.
 */
typedef Bool (TIDY_CALL *TidyOptCallback)(ctmbstr option, ctmbstr value);

/** Applications using TidyLib may want to augment command-line and
 ** configuration file options. Setting this callback allows a LibTidy
 ** application developer to examine command-line and configuration file options
 ** after LibTidy has examined them and failed to recognize them.
 ** Note that this is deprecated and you should instead migrate to
 ** tidySetConfigCallback().
 ** @result Returns `yes` upon success.
 */
TIDY_EXPORT Bool TIDY_CALL          tidySetOptionCallback(TidyDoc tdoc,                /**< The document to apply the callback to. */
                                                          TidyOptCallback pOptCallback /**< The name of a function of type TidyOptCallback() to serve as your callback. */
                                                          );

/** This typedef represents the required signature for your provided callback
 ** function should you wish to register one with tidySetConfigCallback().
 ** Your callback function will be provided with the following parameters.
 ** @param tdoc The document instance for which the callback was invoked.
 ** @param option The option name that was provided.
 ** @param value The option value that was provided
 ** @return Your callback function will return `yes` if it handles the provided
 **         option, or `no` if it does not. In the latter case, Tidy will issue
 **         an unknown configuration option error.
 */
typedef Bool (TIDY_CALL *TidyConfigCallback)(TidyDoc tdoc, ctmbstr option, ctmbstr value);

/** Applications using TidyLib may want to augment command-line and
 ** configuration file options. Setting this callback allows a LibTidy
 ** application developer to examine command-line and configuration file options
 ** after LibTidy has examined them and failed to recognize them.
 ** @result Returns `yes` upon success.
 */
TIDY_EXPORT Bool TIDY_CALL          tidySetConfigCallback(TidyDoc tdoc,                      /**< The document to apply the callback to. */
                                                          TidyConfigCallback pConfigCallback /**< The name of a function of type TidyConfigCallback() to serve as your callback. */
                                                          );

    
/** This typedef represents the required signature for your provided callback
 ** function should you wish to register one with tidySetConfigChangeCallback().
 ** Your callback function will be provided with the following parameters.
 ** @param tdoc The document instance for which the callback was invoked.
 ** @param option The option that will be changed.
 */
typedef void (TIDY_CALL *TidyConfigChangeCallback)(TidyDoc tdoc, TidyOption option);

/** Applications using TidyLib may want to be informed when changes to options
 ** are made. Temporary changes made internally by Tidy are not reported, but
 ** permanent changes made by Tidy (such as indent-spaces or output-encoding)
 ** will be reported.
 ** @note This callback is not currently implemented.
 ** @result Returns `yes` upon success.
 */
TIDY_EXPORT Bool TIDY_CALL          tidySetConfigChangeCallback(TidyDoc tdoc,                      /**< The document to apply the callback to. */
                                                                TidyConfigChangeCallback pCallback /**< The name of a function of type TidyConfigChangeCallback() to serve as your callback. */
                                                                );


/** @}
 ** @name Option ID Discovery
 ** @{
 */

/** Get ID of given Option
 ** @param opt An instance of a TidyOption to query.
 ** @result The TidyOptionId of the given option.
 */
TIDY_EXPORT TidyOptionId TIDY_CALL  tidyOptGetId( TidyOption opt );

/** Returns the TidyOptionId (enum value) by providing the name of a Tidy
 ** configuration option.
 ** @param optnam The name of the option ID to retrieve.
 ** @result The TidyOptionId of the given `optname`.
 */
TIDY_EXPORT TidyOptionId TIDY_CALL  tidyOptGetIdForName(ctmbstr optnam);

/** @}
 ** @name Getting Instances of Tidy Options
 ** @{
 */

/** Initiates an iterator for a list of TidyOption instances, which allows you
 ** to iterate through all of the available options. In order to iterate through
 ** the available options, initiate the iterator with this function, and then
 ** use tidyGetNextOption() to retrieve the first and subsequent options. For
 ** example:
 ** @code{.c}
 **   TidyIterator itOpt = tidyGetOptionList( tdoc );
 **   while ( itOpt ) {
 **     TidyOption opt = tidyGetNextOption( tdoc, &itOpt );
 **     // Use other API to query or set set option values
 **   }
 ** @endcode
 ** @param tdoc An instance of a TidyDoc to query.
 ** @result Returns a TidyIterator, which is a token used to represent the
 **         current position in a list within LibTidy.
 */
TIDY_EXPORT TidyIterator TIDY_CALL  tidyGetOptionList( TidyDoc tdoc );

/** Given a valid TidyIterator initiated with tidyGetOptionList(), returns
 ** the instance of the next TidyOption.
 ** @note This function will return internal-only option types including
 **       `TidyInternalCategory`; you should *never* use these. Always ensure
 **       that you use `tidyOptGetCategory()` before assuming that an option
 **       is okay to use in your application.
 ** @result An instance of TidyOption.
 */
TIDY_EXPORT TidyOption TIDY_CALL    tidyGetNextOption(TidyDoc tdoc,     /**< The document for which you are retrieving options. */
                                                      TidyIterator* pos /**< The TidyIterator (initiated with tidyGetOptionList()) token. */
                                                      );

/** Retrieves an instance of TidyOption given a valid TidyOptionId.
 ** @result An instance of TidyOption matching the provided TidyOptionId.
 */
TIDY_EXPORT TidyOption TIDY_CALL    tidyGetOption(TidyDoc tdoc,      /**< The document for which you are retrieving the option. */
                                                  TidyOptionId optId /**< The TidyOptionId to retrieve. */
                                                  );

/** Returns an instance of TidyOption by providing the name of a Tidy
 ** configuration option.
 ** @result The TidyOption of the given `optname`.
 */
TIDY_EXPORT TidyOption TIDY_CALL    tidyGetOptionByName(TidyDoc tdoc,  /**< The document for which you are retrieving the option. */
                                                        ctmbstr optnam /**< The name of the Tidy configuration option. */
                                                        );

/** @}
 ** @name Information About Options
 ** @{
 */

/** Get name of given Option
 ** @param opt An instance of a TidyOption to query.
 ** @result The name of the given option.
 */
TIDY_EXPORT ctmbstr TIDY_CALL       tidyOptGetName( TidyOption opt );

/** Get datatype of given Option
 ** @param opt An instance of a TidyOption to query.
 ** @result The TidyOptionType of the given option.
 */
TIDY_EXPORT TidyOptionType TIDY_CALL tidyOptGetType( TidyOption opt );

/** Indicates that an option takes a list of items.
 ** @param opt An instance of a TidyOption to query.
 ** @result A bool indicating whether or not the option accepts a list.
 */
TIDY_EXPORT Bool TIDY_CALL tidyOptionIsList( TidyOption opt );

/** Is Option read-only? Some options (mainly internal use only options) are
 ** read-only.
 ** @deprecated This is no longer a valid test for the public API; instead
 **   you should test an option's availability using `tidyOptGetCategory()`
 **   against `TidyInternalCategory`. This API will be removed!
 ** @param opt An instance of a TidyOption to query.
 ** @result Returns `yes` or `no` depending on whether or not the specified
 **         option is read-only.
 */
TIDY_EXPORT Bool TIDY_CALL          tidyOptIsReadOnly( TidyOption opt );

/** Get category of given Option
 ** @param opt An instance of a TidyOption to query.
 ** @result The TidyConfigCategory of the specified option.
 */
TIDY_EXPORT TidyConfigCategory TIDY_CALL tidyOptGetCategory( TidyOption opt );

/** Get default value of given Option as a string 
 ** @param opt An instance of a TidyOption to query.
 ** @result A string indicating the default value of the specified option.
 */
TIDY_EXPORT ctmbstr TIDY_CALL       tidyOptGetDefault( TidyOption opt );

/** Get default value of given Option as an unsigned integer 
 ** @param opt An instance of a TidyOption to query.
 ** @result An unsigned integer indicating the default value of the specified
 **         option.
 */
TIDY_EXPORT ulong TIDY_CALL         tidyOptGetDefaultInt( TidyOption opt );

/** Get default value of given Option as a Boolean value 
 ** @param opt An instance of a TidyOption to query.
 ** @result A boolean indicating the default value of the specified option.
 */
TIDY_EXPORT Bool TIDY_CALL          tidyOptGetDefaultBool( TidyOption opt );

/** Initiates an iterator for a list of TidyOption pick-list values, which
 ** allows you iterate through all of the available option values. In order to
 ** iterate through the available values, initiate the iterator with this
 ** function, and then use tidyOptGetNextPick() to retrieve the first and 
 ** subsequent option values. For example:
 ** @code{.c}
 **   TidyIterator itOpt = tidyOptGetPickList( opt );
 **   while ( itOpt ) {
 **     printf("%s", tidyOptGetNextPick( opt, &itOpt ));
 **   }
 ** @endcode
 ** @param opt An instance of a TidyOption to query.
 ** @result Returns a TidyIterator, which is a token used to represent the
 **         current position in a list within LibTidy.
 */
TIDY_EXPORT TidyIterator TIDY_CALL  tidyOptGetPickList( TidyOption opt );

/** Given a valid TidyIterator initiated with tidyOptGetPickList(), returns a
 ** string representing a possible option value.
 ** @result A string containing the next pick-list option value.
 */
TIDY_EXPORT ctmbstr TIDY_CALL       tidyOptGetNextPick(TidyOption opt,   /**< An instance of a TidyOption to query. */
                                                       TidyIterator* pos /**< The TidyIterator (initiated with tidyOptGetPickList()) token. */
                                                       );

/** @}
 ** @name Option Value Functions
 ** @{
 */

/** Get the current value of the option ID for the given document.
 ** @remark The optId *must* have a @ref TidyOptionType of @ref TidyString!
 */
TIDY_EXPORT ctmbstr TIDY_CALL       tidyOptGetValue(TidyDoc tdoc,      /**< The tidy document whose option value you wish to check. */
                                                    TidyOptionId optId /**< The option ID whose value you wish to check. */
                                                    );

/** Set the option value as a string.
 ** @remark The optId *must* have a @ref TidyOptionType of @ref TidyString!
 ** @result Returns a bool indicating success or failure.
 */
TIDY_EXPORT Bool TIDY_CALL          tidyOptSetValue(TidyDoc tdoc,       /**< The tidy document for which to set the value. */
                                                    TidyOptionId optId, /**< The option ID of the value to set. */
                                                    ctmbstr val         /**< The string value to set. */
                                                    );

/** Set named option value as a string, regardless of the @ref TidyOptionType.
 ** @remark This is good setter if you are unsure of the type.
 ** @result Returns a bool indicating success or failure.
 */
TIDY_EXPORT Bool TIDY_CALL          tidyOptParseValue(TidyDoc tdoc,   /**< The tidy document for which to set the value. */
                                                      ctmbstr optnam, /**< The name of the option to set; this is the string value from the UI, e.g., `error-file`. */
                                                      ctmbstr val     /**< The value to set, as a string. */
                                                      );

/** Get current option value as an integer.
 ** @result Returns the integer value of the specified option.
 */
TIDY_EXPORT ulong TIDY_CALL         tidyOptGetInt(TidyDoc tdoc,      /**< The tidy document for which to get the value. */
                                                  TidyOptionId optId /**< The option ID to get. */
                                                  );

/** Set option value as an integer.
 ** @result Returns a bool indicating success or failure.
 */
TIDY_EXPORT Bool TIDY_CALL          tidyOptSetInt(TidyDoc tdoc,       /**< The tidy document for which to set the value. */
                                                  TidyOptionId optId, /**< The option ID to set. */
                                                  ulong val           /**< The value to set. */
                                                  );

/** Get current option value as a Boolean flag.
 ** @result Returns a bool indicating the value.
 */
TIDY_EXPORT Bool TIDY_CALL          tidyOptGetBool(TidyDoc tdoc,      /**< The tidy document for which to get the value. */
                                                   TidyOptionId optId /**< The option ID to get. */
                                                   );

/** Set option value as a Boolean flag.
 ** @result Returns a bool indicating success or failure.
 */
TIDY_EXPORT Bool TIDY_CALL          tidyOptSetBool(TidyDoc tdoc,       /**< The tidy document for which to set the value. */
                                                   TidyOptionId optId, /**< The option ID to set. */
                                                   Bool val            /**< The value to set. */
                                                   );

/** Reset option to default value by ID.
 ** @result Returns a bool indicating success or failure.
 */
TIDY_EXPORT Bool TIDY_CALL          tidyOptResetToDefault(TidyDoc tdoc,    /**< The tidy document for which to reset the value. */
                                                          TidyOptionId opt /**< The option ID to reset. */
                                                          );

/** Reset all options to their default values.
 ** @param tdoc The tidy document for which to reset all values.
 ** @result Returns a bool indicating success or failure.
 */
TIDY_EXPORT Bool TIDY_CALL          tidyOptResetAllToDefault( TidyDoc tdoc );

/** Take a snapshot of current config settings. These settings are stored
 ** within the tidy document. Note, however, that snapshots do not reliably
 ** survive the tidyParseXXX() process, as Tidy uses the snapshot mechanism
 ** in order to store the current configuration right at the beginning of the
 ** parsing process.
 ** @param tdoc The tidy document for which to take a snapshot.
 ** @result Returns a bool indicating success or failure.
 */
TIDY_EXPORT Bool TIDY_CALL          tidyOptSnapshot( TidyDoc tdoc );

/** Apply a snapshot of config settings to a document.
 ** @param tdoc The tidy document for which to apply a snapshot.
 ** @result Returns a bool indicating success or failure.
 */
TIDY_EXPORT Bool TIDY_CALL          tidyOptResetToSnapshot( TidyDoc tdoc );

/** Any settings different than default? 
 ** @param tdoc The tidy document to check.
 ** @result Returns a bool indicating whether or not a difference exists.
 */
TIDY_EXPORT Bool TIDY_CALL          tidyOptDiffThanDefault( TidyDoc tdoc );

/** Any settings different than snapshot?
 ** @param tdoc The tidy document to check.
 ** @result Returns a bool indicating whether or not a difference exists.
 */
TIDY_EXPORT Bool TIDY_CALL          tidyOptDiffThanSnapshot( TidyDoc tdoc );

/** Copy current configuration settings from one document to another. Note
 ** that the destination document's existing settings will be stored as that
 ** document's snapshot prior to having its option values overwritten by the
 ** source document's settings.
 ** @result Returns a bool indicating success or failure.
 */
TIDY_EXPORT Bool TIDY_CALL          tidyOptCopyConfig(TidyDoc tdocTo,  /**< The destination tidy document. */
                                                      TidyDoc tdocFrom /**< The source tidy document. */
                                                      );

/** Get character encoding name. Used with @ref TidyCharEncoding,
 ** @ref TidyOutCharEncoding, and @ref TidyInCharEncoding.
 ** @result The encoding name as a string for the specified option.
 */
TIDY_EXPORT ctmbstr TIDY_CALL       tidyOptGetEncName(TidyDoc tdoc,      /**< The tidy document to query. */
                                                      TidyOptionId optId /**< The option ID whose value to check. */
                                                      );

/** Get the current pick list value for the option ID, which can be useful for
 ** enum types.
 ** @result Returns a string indicating the current value of the specified
 **         option.
 */
TIDY_EXPORT ctmbstr TIDY_CALL       tidyOptGetCurrPick(TidyDoc tdoc,      /**< The tidy document to query. */
                                                       TidyOptionId optId /**< The option ID whose value to check. */
                                                       );

/** Initiates an iterator for a list of user-declared tags, including autonomous
 ** custom tags detected in the document if @ref TidyUseCustomTags is not set to
 ** **no**. This iterator allows you to iterate through all of the custom tags. 
 ** In order to iterate through the tags, initiate the iterator with this
 ** function, and then use tidyOptGetNextDeclTag() to retrieve the first and
 ** subsequent tags. For example:
 ** @code{.c}
 **   TidyIterator itTag = tidyOptGetDeclTagList( tdoc );
 **   while ( itTag ) {
 **     printf("%s", tidyOptGetNextDeclTag( tdoc, TidyBlockTags, &itTag ));
 **   }
 ** @endcode
 ** @param tdoc An instance of a TidyDoc to query.
 ** @result Returns a TidyIterator, which is a token used to represent the
 **         current position in a list within LibTidy.
 */
TIDY_EXPORT TidyIterator TIDY_CALL  tidyOptGetDeclTagList( TidyDoc tdoc );

/** Given a valid TidyIterator initiated with tidyOptGetDeclTagList(), returns a
 ** string representing a user-declared or autonomous custom tag.
 ** @remark Specifying optId limits the scope of the tags to one of 
 **         @ref TidyInlineTags, @ref TidyBlockTags, @ref TidyEmptyTags, or 
 **         @ref TidyPreTags. Note that autonomous custom tags (if used) are
 **         added to one of these option types, depending on the value of
 **         @ref TidyUseCustomTags.
 ** @result A string containing the next tag.
 */
TIDY_EXPORT ctmbstr TIDY_CALL       tidyOptGetNextDeclTag(TidyDoc tdoc,       /**< The tidy document to query. */
                                                          TidyOptionId optId, /**< The option ID matching the type of tag to retrieve. */
                                                          TidyIterator* iter  /**< The TidyIterator (initiated with tidyOptGetDeclTagList()) token.  */
                                                          );

/** Initiates an iterator for a list of priority attributes. This iterator
 ** allows you to iterate through all of the priority attributes defined with
 ** the `priority-attributes` configuration option. In order to iterate through
 ** the attributes, initiate the iterator with this function, and then use
 ** tidyOptGetNextPriorityAttr() to retrieve the first and subsequent attributes.
 ** For example:
 ** @code{.c}
 **   TidyIterator itAttr = tidyOptGetPriorityAttrList( tdoc );
 **   while ( itAttr ) {
 **     printf("%s", tidyOptGetNextPriorityAttr( tdoc, &itAttr ));
 **   }
 ** @endcode
 ** @param tdoc An instance of a TidyDoc to query.
 ** @result Returns a TidyIterator, which is a token used to represent the
 **         current position in a list within LibTidy.
 */
TIDY_EXPORT TidyIterator TIDY_CALL  tidyOptGetPriorityAttrList( TidyDoc tdoc );

/** Given a valid TidyIterator initiated with tidyOptGetPriorityAttrList(),
 ** returns a string representing a priority attribute.
 ** @result A string containing the next tag.
 */
TIDY_EXPORT ctmbstr TIDY_CALL       tidyOptGetNextPriorityAttr(TidyDoc tdoc,       /**< The tidy document to query. */
                                                               TidyIterator* iter  /**< The TidyIterator (initiated with tidyOptGetPriorityAttrList()) token.  */
                                                               );

/** Initiates an iterator for a list of muted messages. This iterator allows
 ** you to iterate through all of the priority attributes defined with the
 ** `mute` configuration option. In order to iterate through the list, initiate
 ** with this function, and then use tidyOptGetNextMutedMessage() to retrieve
 ** the first and subsequent attributes.
 ** For example:
 ** @code{.c}
 **   TidyIterator itAttr = tidyOptGetMutedMessageList( tdoc );
 **   while ( itAttr ) {
 **     printf("%s", tidyOptGetNextMutedMessage( tdoc, &itAttr ));
 **   }
 ** @endcode
 ** @param tdoc An instance of a TidyDoc to query.
 ** @result Returns a TidyIterator, which is a token used to represent the
 **         current position in a list within LibTidy.
 */
TIDY_EXPORT TidyIterator TIDY_CALL  tidyOptGetMutedMessageList( TidyDoc tdoc );

/** Given a valid TidyIterator initiated with tidyOptGetMutedMessageList(),
 ** returns a string representing a muted message.
 ** @result A string containing the next tag.
 */
TIDY_EXPORT ctmbstr TIDY_CALL       tidyOptGetNextMutedMessage(TidyDoc tdoc,       /**< The tidy document to query. */
                                                               TidyIterator* iter  /**< The TidyIterator (initiated with tidyOptGetMutedMessageList()) token.  */
                                                               );

/** @}
 ** @name Option Documentation
 ** @{
 */

/** Get the description of the specified option.
 ** @result Returns a string containing a description of the given option.
 */
TIDY_EXPORT ctmbstr TIDY_CALL       tidyOptGetDoc(TidyDoc tdoc,  /**< The tidy document to query. */
                                                  TidyOption opt /**< The option ID of the option. */
                                                  );

/** Initiates an iterator for a list of options related to a given option. This
 ** iterator allows you to iterate through all of the related options, if any.
 ** In order to iterate through the options, initiate the iterator with this
 ** function, and then use tidyOptGetNextDocLinks() to retrieve the first and
 ** subsequent options. For example:
 ** @code{.c}
 **   TidyIterator itOpt = tidyOptGetDocLinksList( tdoc, TidyJoinStyles );
 **   while ( itOpt ) {
 **     TidyOption my_option = tidyOptGetNextDocLinks( tdoc, &itOpt );
 **     // do something with my_option
 **   }
 ** @endcode
 ** @result Returns a TidyIterator, which is a token used to represent the
 **         current position in a list within LibTidy.
 */
TIDY_EXPORT TidyIterator TIDY_CALL  tidyOptGetDocLinksList(TidyDoc tdoc,  /**< The tidy document to query. */
                                                           TidyOption opt /**< The option whose related options you wish to find. */
                                                           );

/** Given a valid TidyIterator initiated with tidyOptGetDocLinksList(), returns
 ** a TidyOption instance.
 ** @result Returns in instance of TidyOption.
 */
TIDY_EXPORT TidyOption TIDY_CALL    tidyOptGetNextDocLinks(TidyDoc tdoc,     /**< The tidy document to query. */
                                                           TidyIterator* pos /**< The TidyIterator (initiated with tidyOptGetDocLinksList()) token. */
                                                           );

/** @} */
/** @} end Configuration group */
/* MARK: - I/O and Messages */
/***************************************************************************//**
 ** @defgroup IO I/O and Messages
 **
 ** Tidy provides flexible I/O. By default, Tidy will define, create and use 
 ** instances of input and output handlers for standard C buffered I/O (i.e.,
 ** `FILE* stdin`, `FILE* stdout`, and `FILE* stderr` for content input,
 ** content output and diagnostic output, respectively. A `FILE* cfgFile` 
 ** input handler will be used for config files. Command line options will
 ** just be set directly.
 **
 ** @{
 ******************************************************************************/

/** @name Forward declarations and typedefs.
 ** @{ 
 */

TIDY_STRUCT struct _TidyBuffer;
typedef struct _TidyBuffer TidyBuffer;

/** @}
 ** @name Input Source
 ** If you wish to write to your own input sources, then these types, structs,
 ** and functions will allow them to work seamlessly with Tidy.
 ** @{
 */

/** End of input "character" */
#define EndOfStream (~0u)

/** Input Callback: get next byte of input */
typedef int  (TIDY_CALL *TidyGetByteFunc)( void* sourceData );

/** Input Callback: unget a byte of input */
typedef void (TIDY_CALL *TidyUngetByteFunc)( void* sourceData, byte bt );

/** Input Callback: is end of input? */
typedef Bool (TIDY_CALL *TidyEOFFunc)( void* sourceData );

/** This type defines an input source capable of delivering raw bytes of input.
 */
TIDY_STRUCT
typedef struct _TidyInputSource
{
  void*               sourceData;  /**< Input context. Passed to callbacks. */

  TidyGetByteFunc     getByte;     /**< Pointer to "get byte" callback. */
  TidyUngetByteFunc   ungetByte;   /**< Pointer to "unget" callback. */
  TidyEOFFunc         eof;         /**< Pointer to "eof" callback. */
} TidyInputSource;

/** Facilitates user defined source by providing an entry point to marshal
 ** pointers-to-functions. This is needed by .NET, and possibly other language
 ** bindings.
 ** @result Returns a bool indicating success or failure.
 */
TIDY_EXPORT Bool TIDY_CALL tidyInitSource(TidyInputSource*  source,  /**< The source to populate with data. */
                                          void*             srcData, /**< The input context. */
                                          TidyGetByteFunc   gbFunc,  /**< Pointer to the "get byte" callback. */
                                          TidyUngetByteFunc ugbFunc, /**< Pointer to the "unget" callback. */
                                          TidyEOFFunc       endFunc  /**< Pointer to the "eof" callback. */
                                          );

/** Helper: get next byte from input source.
 ** @param source A pointer to your input source.
 ** @result Returns a byte as an unsigned integer.
 */
TIDY_EXPORT uint TIDY_CALL tidyGetByte( TidyInputSource* source );

/** Helper: unget byte back to input source. */
TIDY_EXPORT void TIDY_CALL tidyUngetByte(TidyInputSource* source, /**< The input source. */
                                         uint byteValue           /**< The byte to push back. */
                                         );

/** Helper: check if input source at end.
 ** @param source The input source.
 ** @result Returns a bool indicating whether or not the source is at EOF.
 */
TIDY_EXPORT Bool TIDY_CALL tidyIsEOF( TidyInputSource* source );

/** @}
 ** @name Output Sink
 ** @{
 */

/** Output callback: send a byte to output */
typedef void (TIDY_CALL *TidyPutByteFunc)( void* sinkData, byte bt );

/** This type defines an output destination capable of accepting raw bytes
 ** of output
 */
TIDY_STRUCT
typedef struct _TidyOutputSink
{
  void*               sinkData;  /**< Output context. Passed to callbacks. */

  TidyPutByteFunc     putByte;   /**< Pointer to "put byte" callback */
} TidyOutputSink;

/** Facilitates user defined sinks by providing an entry point to marshal 
 ** pointers-to-functions. This is needed by .NET, and possibly other language
 ** bindings.
 ** @result Returns a bool indicating success or failure.
 */
TIDY_EXPORT Bool TIDY_CALL tidyInitSink(TidyOutputSink* sink,     /**< The sink to populate with data. */
                                        void*           snkData,  /**< The output context. */
                                        TidyPutByteFunc pbFunc    /**< Pointer to the "put byte" callback function. */
                                        );

/** Helper: send a byte to output. */
TIDY_EXPORT void TIDY_CALL tidyPutByte(TidyOutputSink* sink, /**< The output sink to send a byte. */
                                       uint byteValue        /**< The byte to be sent. */
                                       );

/** @}
 ** @name Emacs-compatible reporting support.
 ** If you work with Emacs and prefer Tidy's report output to be in a form
 ** that is easy for Emacs to parse, then these functions may be valuable.
 ** @{
 */

/** Set the file path to use for reports when `TidyEmacs` is being used. This
 ** function provides a proper interface for using the hidden, internal-only
 ** `TidyEmacsFile` configuration option.
 */
TIDY_EXPORT void TIDY_CALL tidySetEmacsFile(TidyDoc tdoc,    /**< The tidy document for which you are setting the filePath. */
                                            ctmbstr filePath /**< The path of the document that should be reported. */
                                            );

/** Get the file path to use for reports when `TidyEmacs` is being used. This
 ** function provides a proper interface for using the hidden, internal-only
 ** `TidyEmacsFile` configuration option.
 ** @param tdoc The tidy document for which you want to fetch the file path.
 ** @result Returns a string indicating the file path.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyGetEmacsFile( TidyDoc tdoc );
    
/** @}
 ** @name Error Sink
 ** Send Tidy's output to any of several destinations with these functions.
 ** @{
 */

/** Set error sink to named file. 
 ** @result Returns a file handle.
 */
TIDY_EXPORT FILE* TIDY_CALL tidySetErrorFile(TidyDoc tdoc,     /**< The document to set. */
                                             ctmbstr errfilnam /**< The file path to send output. */
                                             );

/** Set error sink to given buffer. 
 ** @result Returns 0 upon success or a standard error number.
 */
TIDY_EXPORT int TIDY_CALL tidySetErrorBuffer(TidyDoc tdoc,      /**< The document to set. */
                                             TidyBuffer* errbuf /**< The TidyBuffer to collect output. */
                                             );

/** Set error sink to given generic sink.
 ** @result Returns 0 upon success or a standard error number.
 */
TIDY_EXPORT int TIDY_CALL tidySetErrorSink(TidyDoc tdoc,        /**< The document to set. */
                                           TidyOutputSink* sink /**< The TidyOutputSink to collect output. */
                                           );

/** @}
 ** @name Error and Message Callbacks - TidyReportFilter
 ** A simple callback to filter or collect messages by diagnostic level,
 ** for example, TidyInfo, TidyWarning, etc. Its name reflects its original
 ** purpose as a filter, by which your application can inform LibTidy whether
 ** or not to output a particular report.
 **
 ** @{
 */

/** This typedef represents the required signature for your provided callback
 ** function should you wish to register one with tidySetReportFilter().
 ** Your callback function will be provided with the following parameters.
 ** @param tdoc Indicates the tidy document the message comes from.
 ** @param lvl Specifies the TidyReportLevel of the message.
 ** @param line Indicates the line number in the source document the message applies to.
 ** @param col Indicates the column in the source document the message applies to.
 ** @param mssg Specifies the complete message as Tidy would emit it.
 ** @return Your callback function will return `yes` if Tidy should include the
 **         report in its own output sink, or `no` if Tidy should suppress it.
 */
typedef Bool (TIDY_CALL *TidyReportFilter)( TidyDoc tdoc, TidyReportLevel lvl, uint line, uint col, ctmbstr mssg );

/** This function informs Tidy to use the specified callback to send reports. */
TIDY_EXPORT Bool TIDY_CALL tidySetReportFilter(TidyDoc tdoc,                 /**< The tidy document for which the callback applies. */
                                               TidyReportFilter filtCallback /**< A pointer to your callback function of type TidyReportFilter. */
                                               );

/** @}
 ** @name Error and Message Callbacks - TidyReportCallback
 ** A simple callback to filter or collect messages reported by Tidy.
 ** Unlike TidyReportFilter, more data are provided (including a `va_list`),
 ** making this callback suitable for applications that provide more
 ** sophisticated handling of reports.
 ** @remark The use of a `va_list` may preclude using this callback from
 **         non-C-like languages, which is uncharacteristic of Tidy. For more
 **         flexibility, consider using TidyMessageCallback instead.
 ** @note This callback was previously `TidyMessageFilter3` in older versions
 **       of LibTidy.
 ** @{
 */

/** This typedef represents the required signature for your provided callback
 ** function should you wish to register one with tidySetReportCallback().
 ** Your callback function will be provided with the following parameters.
 ** @param tdoc Indicates the tidy document the message comes from.
 ** @param lvl Specifies the TidyReportLevel of the message.
 ** @param line Indicates the line number in the source document the message applies to.
 ** @param col Indicates the column in the source document the message applies to.
 ** @param code Specifies the message code representing the message. Note that
 **        this code is a string value that the API promises to hold constant,
 **        as opposed to an enum value that can change at any time. Although
 **        this is intended so that you can look up your own application's
 **        strings, you can retrieve Tidy's format string with this code by
 **        using tidyErrorCodeFromKey() and then the tidyLocalizedString()
 **        family of functions.
 ** @param args Is a `va_list` of arguments used to fill Tidy's message format string.
 ** @return Your callback function will return `yes` if Tidy should include the
 **         report in its own output sink, or `no` if Tidy should suppress it.
 */
typedef Bool (TIDY_CALL *TidyReportCallback)( TidyDoc tdoc, TidyReportLevel lvl,
                                              uint line, uint col, ctmbstr code, va_list args );

/** This function informs Tidy to use the specified callback to send reports. */
TIDY_EXPORT Bool TIDY_CALL tidySetReportCallback(TidyDoc tdoc,                   /**< The tidy document for which the callback applies. */
                                                 TidyReportCallback filtCallback /**< A pointer to your callback function of type TidyReportCallback. */
                                                 );

/** @}
 ** @name Error and Message Callbacks - TidyMessageCallback
 ** A sophisticated and extensible callback to filter or collect messages
 ** reported by Tidy. It returns only an opaque type `TidyMessage` for every
 ** report and dialogue message, and this message can be queried with the
**  TidyMessageCallback API, below. Note that unlike the older filters, this
**  callback exposes *all* output that LibTidy emits (excluding the console
**  application, which is a client of LibTidy).
*/

/** This typedef represents the required signature for your provided callback
 ** function should you wish to register one with tidySetMessageCallback().
 ** Your callback function will be provided with the following parameters.
 ** @param tmessage An opaque type used as a token against which other API
 **        calls can be made.
 ** @return Your callback function will return `yes` if Tidy should include the
 **         report in its own output sink, or `no` if Tidy should suppress it.
 */
typedef Bool (TIDY_CALL *TidyMessageCallback)( TidyMessage tmessage );

/** This function informs Tidy to use the specified callback to send reports. */
TIDY_EXPORT Bool TIDY_CALL tidySetMessageCallback(TidyDoc tdoc,                    /**< The tidy document for which the callback applies. */
                                                  TidyMessageCallback filtCallback /**< A pointer to your callback function of type TidyMessageCallback. */
                                                  );

/** @name TidyMessageCallback API
 ** When using `TidyMessageCallback` you will be supplied with a TidyMessage 
 ** object, which is used as a token to be interrogated with the following
 ** API before the callback returns.
 ** @remark Upon returning from the callback, this object is destroyed so do
 ** not attempt to copy it, or keep it around, or use it in any way.
 **
 ** @{
 */

/** Get the tidy document this message comes from. 
 ** @param tmessage Specify the message that you are querying.
 ** @result Returns the TidyDoc that generated the message.
 */
TIDY_EXPORT TidyDoc TIDY_CALL tidyGetMessageDoc( TidyMessage tmessage );

/** Get the message code.
 ** @param tmessage Specify the message that you are querying.
 ** @result Returns a code representing the message. This code can be used
 **         directly with the localized strings API; however we never make
 **         any guarantees about the value of these codes. For code stability
 **         don't store this value in your own application. Instead use the
 **         enum field or use the message key string value.
 */
TIDY_EXPORT uint TIDY_CALL tidyGetMessageCode( TidyMessage tmessage );

/** Get the message key string.
 ** @param tmessage Specify the message that you are querying.
 ** @result Returns a string representing the message. This string is intended
 **         to be stable by the LibTidy API, and is suitable for use as a key
 **         in your own applications.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyGetMessageKey( TidyMessage tmessage );

/** Get the line number the message applies to.
 ** @param tmessage Specify the message that you are querying.
 ** @result Returns the line number, if any, that generated the message.
 */
TIDY_EXPORT int TIDY_CALL tidyGetMessageLine( TidyMessage tmessage );

/** Get the column the message applies to.
 ** @param tmessage Specify the message that you are querying.
 ** @result Returns the column number, if any, that generated the message.
 */
TIDY_EXPORT int TIDY_CALL tidyGetMessageColumn( TidyMessage tmessage );

/** Get the TidyReportLevel of the message.
 ** @param tmessage Specify the message that you are querying.
 ** @result Returns a TidyReportLevel indicating the severity or status of the
 **         message.
 */
TIDY_EXPORT TidyReportLevel TIDY_CALL tidyGetMessageLevel( TidyMessage tmessage );


/** Get the muted status of the message, that is, whether or not the
 ** current configuration indicated that this message should be muted.
 ** @param tmessage Specify the message that you are querying.
 ** @result Returns a Bool indicating that the config indicates muting this
 **         message.
 */
TIDY_EXPORT Bool TIDY_CALL tidyGetMessageIsMuted( TidyMessage tmessage );

/** Get the default format string, which is the format string for the message
 ** in Tidy's default localization (en_us).
 ** @param tmessage Specify the message that you are querying.
 ** @result Returns the default localization format string of the message.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyGetMessageFormatDefault( TidyMessage tmessage );

/** Get the localized format string. If a localized version of the format string
 ** doesn't exist, then the default version will be returned.
 ** @param tmessage Specify the message that you are querying.
 ** @result Returns the localized format string of the message.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyGetMessageFormat( TidyMessage tmessage );

/** Get the message with the format string already completed, in Tidy's
 ** default localization.
 ** @param tmessage Specify the message that you are querying.
 ** @result Returns the message in the default localization.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyGetMessageDefault( TidyMessage tmessage );

/** Get the message with the format string already completed, in Tidy's
 ** current localization.
 ** @param tmessage Specify the message that you are querying.
 ** @result Returns the message in the current localization.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyGetMessage( TidyMessage tmessage );

/** Get the position part part of the message in the default language.
 ** @param tmessage Specify the message that you are querying.
 ** @result Returns the positional part of a string as Tidy would display it
 **         in the console application.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyGetMessagePosDefault( TidyMessage tmessage );

/** Get the position part part of the message in the current language.
 ** @param tmessage Specify the message that you are querying.
 ** @result Returns the positional part of a string as Tidy would display it
 **         in the console application.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyGetMessagePos( TidyMessage tmessage );

/** Get the prefix part of a message in the default language.
 ** @param tmessage Specify the message that you are querying.
 ** @result Returns the message prefix part of a string as Tidy would display
 **         it in the console application.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyGetMessagePrefixDefault( TidyMessage tmessage );

/** Get the prefix part of a message in the current language.
 ** @param tmessage Specify the message that you are querying.
 ** @result Returns the message prefix part of a string as Tidy would display
 **         it in the console application.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyGetMessagePrefix( TidyMessage tmessage );

/** Get the complete message as Tidy would emit it in the default localization.
 ** @param tmessage Specify the message that you are querying.
 ** @result Returns the complete message just as Tidy would display it on the
 **         console.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyGetMessageOutputDefault( TidyMessage tmessage );

/** Get the complete message as Tidy would emit it in the current localization.
 ** @param tmessage Specify the message that you are querying.
 ** @result Returns the complete message just as Tidy would display it on the
 **         console.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyGetMessageOutput( TidyMessage tmessage );

/** @} end subgroup TidyMessageCallback API */

/** @name TidyMessageCallback Arguments API
 ** When using `TidyMessageCallback` you will be supplied with a TidyMessage
 ** object which can be used as a token against which to query using this API.
 ** This API deals strictly with _arguments_ that a message may or may not have;
 ** these are the same arguments that Tidy would apply to a format string in
 ** order to fill in the placeholder fields and deliver a complete report or
 ** dialogue string to you.
 **
 ** @{
 */

/** Initiates an iterator for a list of arguments related to a given message.
 ** This iterator allows you to iterate through all of the arguments, if any.
 ** In order to iterate through the arguments, initiate the iterator with this
 ** function, and then use tidyGetNextMessageArgument() to retrieve the first
 ** and subsequent arguments. For example:
 ** @code{.c}
 **   TidyIterator itArg = tidyGetMessageArguments( tmessage );
 **   while ( itArg ) {
 **     TidyMessageArgument my_arg = tidyGetNextMessageArgument( tmessage, &itArg );
 **     // do something with my_arg, such as inspect its value or format
 **   }
 ** @endcode
 ** @param tmessage The message about whose arguments you wish to query.
 ** @result Returns a TidyIterator, which is a token used to represent the
 **         current position in a list within LibTidy.
 */
TIDY_EXPORT TidyIterator TIDY_CALL tidyGetMessageArguments( TidyMessage tmessage );

/** Given a valid TidyIterator initiated with tidyGetMessageArguments(), returns
 ** an instance of the opaque type TidyMessageArgument, which serves as a token
 ** against which the remaining argument API functions may be used to query
 ** information.
 ** @result Returns an instance of TidyMessageArgument.
 */
TIDY_EXPORT TidyMessageArgument TIDY_CALL tidyGetNextMessageArgument(TidyMessage tmessage, /**< The message whose arguments you want to access. */
                                                                     TidyIterator* iter    /**< The TidyIterator (initiated with tidyOptGetDocLinksList()) token. */
                                                                     );

/** Returns the `TidyFormatParameterType` of the given message argument.
 ** @result Returns the type of parameter of type TidyFormatParameterType.
 */
TIDY_EXPORT TidyFormatParameterType TIDY_CALL tidyGetArgType(TidyMessage tmessage,    /**< The message whose arguments you want to access. */
                                                             TidyMessageArgument* arg /**< The argument that you are querying. */
                                                             );

/** Returns the format specifier of the given message argument. The memory for
 ** this string is cleared upon termination of the callback, so do be sure to
 ** make your own copy.
 ** @result Returns the format specifier string of the given argument.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyGetArgFormat(TidyMessage tmessage,    /**< The message whose arguments you want to access. */
                                               TidyMessageArgument* arg /**< The argument that you are querying. */
                                               );

/** Returns the string value of the given message argument. An assertion
 ** will be generated if the argument type is not a string.
 ** @result Returns the string value of the given argument.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyGetArgValueString(TidyMessage tmessage,    /**< The message whose arguments you want to access. */
                                                    TidyMessageArgument* arg /**< The argument that you are querying. */
                                                    );

/** Returns the unsigned integer value of the given message argument. An
 ** assertion will be generated if the argument type is not an unsigned int.
 ** @result Returns the unsigned integer value of the given argument.
 */
TIDY_EXPORT uint TIDY_CALL tidyGetArgValueUInt(TidyMessage tmessage,    /**< The message whose arguments you want to access. */
                                               TidyMessageArgument* arg /**< The argument that you are querying. */
                                               );

/** Returns the integer value of the given message argument. An assertion
 ** will be generated if the argument type is not an integer.
 ** @result Returns the integer value of the given argument.
 */
TIDY_EXPORT int TIDY_CALL tidyGetArgValueInt(TidyMessage tmessage,    /**< The message whose arguments you want to access. */
                                             TidyMessageArgument* arg /**< The argument that you are querying. */
                                             );

/**
 *  Returns the double value of the given message argument. An assertion
 *  will be generated if the argument type is not a double.
 ** @result Returns the double value of the given argument.
 */
TIDY_EXPORT double TIDY_CALL tidyGetArgValueDouble(TidyMessage tmessage,    /**< The message whose arguments you want to access. */
                                                   TidyMessageArgument* arg /**< The argument that you are querying. */
                                                   );

/** @} end subgroup TidyMessageCallback Arguments API */

/** @name Printing
 ** LibTidy applications can somewhat track the progress of the tidying process
 ** by using this provided callback. It relates where something in the source
 ** document ended up in the output.
 ** @{
 */
    
/** This typedef represents the required signature for your provided callback
 ** function should you wish to register one with tidySetMessageCallback().
 ** Your callback function will be provided with the following parameters.
 ** @param tdoc Indicates the source tidy document.
 ** @param line Indicates the line in the source document at this point in the process.
 ** @param col Indicates the column in the source document at this point in the process.
 ** @param destLine Indicates the line number in the output document at this point in the process.
 */
typedef void (TIDY_CALL *TidyPPProgress)( TidyDoc tdoc, uint line, uint col, uint destLine );

/** This function informs Tidy to use the specified callback for tracking the
 ** pretty-printing process progress.
 */
TIDY_EXPORT Bool TIDY_CALL   tidySetPrettyPrinterCallback(TidyDoc tdoc,
                                                          TidyPPProgress callback
                                                          );

/** @} */
/** @} end IO group */
/* MARK: - Document Parse */
/***************************************************************************//**
 ** @defgroup Parse Document Parse
 **
 ** Functions for parsing markup from a given input source, as well as string
 ** and filename functions for added convenience. HTML/XHTML version determined
 ** from input.
 **
 ** @{
 ******************************************************************************/

/** Parse markup in named file.
 ** @result Returns the highest of `2` indicating that errors were present in
 **         the document, `1` indicating warnings, and `0` in the case of
 **         everything being okay.
 */
TIDY_EXPORT int TIDY_CALL         tidyParseFile(TidyDoc tdoc,    /**< The tidy document to use for parsing. */
                                                ctmbstr filename /**< The filename to parse. */
                                                );

/** Parse markup from the standard input.
 ** @param tdoc The tidy document to use for parsing.
 ** @result Returns the highest of `2` indicating that errors were present in
 **         the document, `1` indicating warnings, and `0` in the case of
 **         everything being okay.
 */
TIDY_EXPORT int TIDY_CALL         tidyParseStdin( TidyDoc tdoc );

/** Parse markup in given string.
 ** @result Returns the highest of `2` indicating that errors were present in
 **         the document, `1` indicating warnings, and `0` in the case of
 **         everything being okay.
 */
TIDY_EXPORT int TIDY_CALL         tidyParseString(TidyDoc tdoc,   /**< The tidy document to use for parsing. */
                                                  ctmbstr content /**< The string to parse. */
                                                  );

/** Parse markup in given buffer.
 ** @result Returns the highest of `2` indicating that errors were present in
 **         the document, `1` indicating warnings, and `0` in the case of
 **         everything being okay.
 */
TIDY_EXPORT int TIDY_CALL         tidyParseBuffer(TidyDoc tdoc,   /**< The tidy document to use for parsing. */
                                                  TidyBuffer* buf /**< The TidyBuffer containing data to parse. */
                                                  );

/** Parse markup in given generic input source.
 ** @result Returns the highest of `2` indicating that errors were present in
 **         the document, `1` indicating warnings, and `0` in the case of
 **         everything being okay.
 */
TIDY_EXPORT int TIDY_CALL         tidyParseSource(TidyDoc tdoc,           /**< The tidy document to use for parsing. */
                                                  TidyInputSource* source /**< A TidyInputSource containing data to parse. */
                                                  );


/** @} End Parse group */
/* MARK: - Diagnostics and Repair */
/***************************************************************************//**
 ** @defgroup Clean Diagnostics and Repair
 **
 ** After parsing the document, you can use these functions to attempt cleanup,
 ** repair, get additional diagnostics, and determine the document type.
 ** @{
 ******************************************************************************/

/** Execute configured cleanup and repair operations on parsed markup.
 ** @param tdoc The tidy document to use.
 ** @result An integer representing the status.
 */
TIDY_EXPORT int TIDY_CALL         tidyCleanAndRepair( TidyDoc tdoc );

/** Reports the document type and diagnostic statistics on parsed and repaired 
 ** markup. You must call tidyCleanAndRepair() before using this function.
 ** @param tdoc The tidy document to use.
 ** @result An integer representing the status.
 */
TIDY_EXPORT int TIDY_CALL         tidyRunDiagnostics( TidyDoc tdoc );

/** Reports the document type into the output sink.
 ** @param tdoc The tidy document to use.
 ** @result An integer representing the status.
 */
TIDY_EXPORT int TIDY_CALL         tidyReportDoctype( TidyDoc tdoc );


/** @} end Clean group */
/* MARK: - Document Save Functions */
/***************************************************************************//**
 ** @defgroup Save Document Save Functions
 **
 ** Save currently parsed document to the given output sink. File name
 ** and string/buffer functions provided for convenience.
 **
 ** @{
 ******************************************************************************/

/** Save the tidy document to the named file.
 ** @result An integer representing the status.
 */
TIDY_EXPORT int TIDY_CALL         tidySaveFile(TidyDoc tdoc,    /**< The tidy document to save. */
                                               ctmbstr filename /**< The destination file name. */
                                               );

/** Save the tidy document to standard output (FILE*).
 ** @param tdoc The tidy document to save.
 ** @result An integer representing the status.
 */
TIDY_EXPORT int TIDY_CALL         tidySaveStdout( TidyDoc tdoc );

/** Save the tidy document to given TidyBuffer object.
 ** @result An integer representing the status.
 */
TIDY_EXPORT int TIDY_CALL         tidySaveBuffer(TidyDoc tdoc,   /**< The tidy document to save. */
                                                 TidyBuffer* buf /**< The buffer to place the output. */
                                                 );

/** Save the tidy document to an application buffer. If TidyShowMarkup and the
 ** document has no errors, or TidyForceOutput, then the current document (per
 ** the current configuration) will be pretty printed to this application
 ** buffer. The document byte length (not character length) will be placed into
 ** *buflen. The document will not be null terminated. If the buffer is not big
 ** enough, ENOMEM will be returned, else the actual document status.
 ** @result An integer representing the status.
 */
TIDY_EXPORT int TIDY_CALL         tidySaveString(TidyDoc tdoc,  /**< The tidy document to save. */
                                                 tmbstr buffer, /**< The buffer to save to. */
                                                 uint* buflen   /**< [out] The byte length written. */
                                                 );

/** Save to given generic output sink.
 ** @result An integer representing the status.
 */
TIDY_EXPORT int TIDY_CALL         tidySaveSink(TidyDoc tdoc,        /**< The tidy document to save. */
                                               TidyOutputSink* sink /**< The output sink to save to. */
                                               );

/** Save current settings to named file. Only writes non-default values.
 ** @result An integer representing the status.
 */
TIDY_EXPORT int TIDY_CALL         tidyOptSaveFile(TidyDoc tdoc,  /**< The tidy document to save. */
                                                  ctmbstr cfgfil /**< The filename to save the configuration to. */
                                                  );

/** Save current settings to given output sink. Only non-default values are
 ** written.
 ** @result An integer representing the status.
 */
TIDY_EXPORT int TIDY_CALL         tidyOptSaveSink(TidyDoc tdoc,        /**< The tidy document to save. */
                                                  TidyOutputSink* sink /**< The output sink to save the configuration to. */
                                                  );


/** @} end Save group */
/* MARK: - Document Tree */
/***************************************************************************//**
 ** @defgroup Tree Document Tree
 **
 ** A parsed (and optionally repaired) document is represented by Tidy as a
 ** tree, much like a W3C DOM. This tree may be traversed using these 
 ** functions. The following snippet gives a basic idea how these functions
 ** can be used.
 **
 ** @code{.c}
 ** void dumpNode( TidyNode tnod, int indent ) {
 **   TidyNode child;
 ** 
 **   for ( child = tidyGetChild(tnod); child; child = tidyGetNext(child) ) {
 **     ctmbstr name;
 **     switch ( tidyNodeGetType(child) ) {
 **     case TidyNode_Root:       name = "Root";                    break;
 **     case TidyNode_DocType:    name = "DOCTYPE";                 break;
 **     case TidyNode_Comment:    name = "Comment";                 break;
 **     case TidyNode_ProcIns:    name = "Processing Instruction";  break;
 **     case TidyNode_Text:       name = "Text";                    break;
 **     case TidyNode_CDATA:      name = "CDATA";                   break;
 **     case TidyNode_Section:    name = "XML Section";             break;
 **     case TidyNode_Asp:        name = "ASP";                     break;
 **     case TidyNode_Jste:       name = "JSTE";                    break;
 **     case TidyNode_Php:        name = "PHP";                     break;
 **     case TidyNode_XmlDecl:    name = "XML Declaration";         break;
 ** 
 **     case TidyNode_Start:
 **     case TidyNode_End:
 **     case TidyNode_StartEnd:
 **     default:
 **       name = tidyNodeGetName( child );
 **       break;
 **     }
 **     assert( name != NULL );
 **     printf( "\%*.*sNode: \%s\\n", indent, indent, " ", name );
 **     dumpNode( child, indent + 4 );
 **   }
 ** }
 ** 
 ** void dumpDoc( TidyDoc tdoc ) {
 **   dumpNode( tidyGetRoot(tdoc), 0 );
 ** }
 ** 
 ** void dumpBody( TidyDoc tdoc ) {
 **   dumpNode( tidyGetBody(tdoc), 0 );
 ** }
 ** @endcode
 **
 ** @{
 ******************************************************************************/

/** @name Nodes for Document Sections
 ** @{
 */

/** Get the root node.
 ** @param tdoc The document to query.
 ** @result Returns a tidy node.
 */
TIDY_EXPORT TidyNode TIDY_CALL    tidyGetRoot( TidyDoc tdoc );

/** Get the HTML node.
 ** @param tdoc The document to query.
 ** @result Returns a tidy node.
 */
TIDY_EXPORT TidyNode TIDY_CALL    tidyGetHtml( TidyDoc tdoc );

/** Get the HEAD node.
 ** @param tdoc The document to query.
 ** @result Returns a tidy node.
 */
TIDY_EXPORT TidyNode TIDY_CALL    tidyGetHead( TidyDoc tdoc );

/** Get the BODY node.
 ** @param tdoc The document to query.
 ** @result Returns a tidy node.
 */
TIDY_EXPORT TidyNode TIDY_CALL    tidyGetBody( TidyDoc tdoc );

/** @}
 ** @name Relative Nodes
 ** @{
 */

/** Get the parent of the indicated node.
 ** @param tnod The node to query.
 ** @result Returns a tidy node.
 */
TIDY_EXPORT TidyNode TIDY_CALL    tidyGetParent( TidyNode tnod );

/** Get the child of the indicated node.
 ** @param tnod The node to query.
 ** @result Returns a tidy node.
 */
TIDY_EXPORT TidyNode TIDY_CALL    tidyGetChild( TidyNode tnod );

/** Get the next sibling node.
 ** @param tnod The node to query.
 ** @result Returns a tidy node.
 */
TIDY_EXPORT TidyNode TIDY_CALL    tidyGetNext( TidyNode tnod );

/** Get the previous sibling node.
 ** @param tnod The node to query.
 ** @result Returns a tidy node.
 */
TIDY_EXPORT TidyNode TIDY_CALL    tidyGetPrev( TidyNode tnod );

/** @}
 ** @name Miscellaneous Node Functions
 ** @{
 */

/** Remove the indicated node.
 ** @result Returns the next tidy node.
 */
TIDY_EXPORT TidyNode TIDY_CALL    tidyDiscardElement(TidyDoc tdoc, /**< The tidy document from which to remove the node. */
                                                     TidyNode tnod /**< The node to remove */
                                                     );

/** @}
 ** @name Node Attribute Functions
 ** @{
 */

/** Get the first attribute.
 ** @param tnod The node for which to get attributes.
 ** @result Returns an instance of TidyAttr.
 */
TIDY_EXPORT TidyAttr TIDY_CALL    tidyAttrFirst( TidyNode tnod );

/** Get the next attribute.
 ** @param tattr The current attribute, so the next one can be returned.
 ** @result Returns and instance of TidyAttr.
 */
TIDY_EXPORT TidyAttr TIDY_CALL    tidyAttrNext( TidyAttr tattr );

/** Get the name of a TidyAttr instance.
 ** @param tattr The tidy attribute to query.
 ** @result Returns a string indicating the name of the attribute.
 */
TIDY_EXPORT ctmbstr TIDY_CALL     tidyAttrName( TidyAttr tattr );

/** Get the value of a TidyAttr instance.
 ** @param tattr The tidy attribute to query.
 ** @result Returns a string indicating the value of the attribute.
 */
TIDY_EXPORT ctmbstr TIDY_CALL     tidyAttrValue( TidyAttr tattr );

/** Discard an attribute. */
TIDY_EXPORT void TIDY_CALL        tidyAttrDiscard(TidyDoc itdoc, /**< The tidy document from which to discard the attribute. */
                                                  TidyNode tnod, /**< The node from which to discard the attribute. */
                                                  TidyAttr tattr /**< The attribute to discard. */
                                                  );

/** Get the attribute ID given a tidy attribute.
 ** @param tattr The attribute to query.
 ** @result Returns the TidyAttrId of the given attribute.
 **/
TIDY_EXPORT TidyAttrId TIDY_CALL  tidyAttrGetId( TidyAttr tattr );

/** Indicates whether or not a given attribute is an event attribute.
 ** @param tattr The attribute to query.
 ** @result Returns a bool indicating whether or not the attribute is an event.
 **/
TIDY_EXPORT Bool TIDY_CALL        tidyAttrIsEvent( TidyAttr tattr );

/** Get an instance of TidyAttr by specifying an attribute ID.
 ** @result Returns a TidyAttr instance.
 */
TIDY_EXPORT TidyAttr TIDY_CALL    tidyAttrGetById(TidyNode tnod,   /**< The node to query. */
                                                  TidyAttrId attId /**< The attribute ID to find. */
                                                  );

/** @}
 ** @name Additional Node Interrogation
 ** @{
 */

/** Get the type of node.
 ** @param tnod The node to query.
 ** @result Returns the type of node as TidyNodeType.
 */
TIDY_EXPORT TidyNodeType TIDY_CALL tidyNodeGetType( TidyNode tnod );

/** Get the name of the node.
 ** @param tnod The node to query.
 ** @result Returns a string indicating the name of the node.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyNodeGetName( TidyNode tnod );

/** Indicates whether or not a node is a text node.
 ** @param tnod The node to query.
 ** @result Returns a bool indicating whether or not the node is a text node.
 */
TIDY_EXPORT Bool TIDY_CALL tidyNodeIsText( TidyNode tnod );

/** Indicates whether or not the node is a propriety type.
 ** @result Returns a bool indicating whether or not the node is a proprietary type.
 */
TIDY_EXPORT Bool TIDY_CALL tidyNodeIsProp(TidyDoc tdoc, /**< The document to query. */
                                          TidyNode tnod /**< The node to query */
                                          );

/** Indicates whether or not a node represents and HTML header element, such
 ** as h1, h2, etc.
 ** @param tnod The node to query.
 ** @result Returns a bool indicating whether or not the node is an HTML header.
 */
TIDY_EXPORT Bool TIDY_CALL tidyNodeIsHeader( TidyNode tnod );

/** Indicates whether or not the node has text.
 ** @result Returns the type of node as TidyNodeType.
 */
TIDY_EXPORT Bool TIDY_CALL tidyNodeHasText(TidyDoc tdoc, /**< The document to query. */
                                           TidyNode tnod /**< The node to query. */
                                           );

/** Gets the text of a node and places it into the given TidyBuffer.
 ** @result Returns a bool indicating success or not.
 */
TIDY_EXPORT Bool TIDY_CALL tidyNodeGetText(TidyDoc tdoc,   /**< The document to query. */
                                           TidyNode tnod,  /**< The node to query. */
                                           TidyBuffer* buf /**< [out] A TidyBuffer used to receive the node's text. */
                                           );

/** Get the value of the node. This copies the unescaped value of this node into
 ** the given TidyBuffer at UTF-8.
 ** @result Returns a bool indicating success or not.
 */
TIDY_EXPORT Bool TIDY_CALL tidyNodeGetValue(TidyDoc tdoc,   /**< The document to query */
                                            TidyNode tnod,  /**< The node to query */
                                            TidyBuffer* buf /**< [out] A TidyBuffer used to receive the node's value. */
                                            );

/** Get the tag ID of the node.
 ** @param tnod The node to query.
 ** @result Returns the tag ID of the node as TidyTagId.
 */
TIDY_EXPORT TidyTagId TIDY_CALL tidyNodeGetId( TidyNode tnod );

/** Get the line number where the node occurs.
 ** @param tnod The node to query.
 ** @result Returns the line number.
 */
TIDY_EXPORT uint TIDY_CALL tidyNodeLine( TidyNode tnod );

/** Get the column location of the node.
 ** @param tnod The node to query.
 ** @result Returns the column location of the node.
 */
TIDY_EXPORT uint TIDY_CALL tidyNodeColumn( TidyNode tnod );


/** @} */
/** @} end Tree group */
/* MARK: - Message Key Management */
/***************************************************************************//**
 ** @defgroup MessagesKeys Message Key Management
 **
 ** These functions serve to manage message codes, i.e., codes that are used
 ** Tidy and communicated via its callback filters to represent reports and
 ** dialogue that Tidy emits.
 **
 ** @remark These codes only reflect complete messages, and are specifically
 **         distinct from the internal codes that are used to lookup individual
 **         strings for localization purposes.
 **
 ** @{
 ******************************************************************************/

/**
 ** Given a message code, return the text key that represents it.
 ** @param code The error code to lookup.
 ** @result The string representing the error code.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyErrorCodeAsKey(uint code);

/**
 ** Given a text key representing a message code, return the uint that
 ** represents it.
 **
 ** @remark We establish that for external purposes, the API will ensure that
 **         string keys remain consistent. *Never* count on the integer value
 **         of a message code. Always use this function to ensure that the
 **         integer is valid if you need one.
 ** @param code The string representing the error code.
 ** @result Returns an integer that represents the error code, which can be
 **         used to lookup Tidy's built-in strings. If the provided string does
 **         not have a matching message code, then UINT_MAX will be returned.
 */
TIDY_EXPORT uint TIDY_CALL tidyErrorCodeFromKey(ctmbstr code);

/** Initiates an iterator for a list of message codes available in Tidy.
 ** This iterator allows you to iterate through all of the code. In orde to
 ** iterate through the codes, initiate the iterator with this function, and
 ** then use getNextErrorCode() to retrieve the first and subsequent codes.
 ** For example:
 ** @code{.c}
 **   TidyIterator itMessage = getErrorCodeList();
 **   while ( itMessage ) {
 **     uint code = getNextErrorCode( &itMessage );
 **     // do something with the code, such as lookup a string.
 **   }
 ** @endcode
 ** @result Returns a TidyIterator, which is a token used to represent the
 **         current position in a list within LibTidy.
 */
TIDY_EXPORT TidyIterator TIDY_CALL getErrorCodeList(void);

/** Given a valid TidyIterator initiated with getErrorCodeList(), returns
 ** an instance of the opaque type TidyMessageArgument, which serves as a token
 ** against which the remaining argument API functions may be used to query
 ** information.
 ** @param iter The TidyIterator (initiated with getErrorCodeList()) token.
 ** @result Returns a message code.
 */
TIDY_EXPORT uint TIDY_CALL getNextErrorCode( TidyIterator* iter );


/** @} end MessagesKeys group */
/* MARK: - Localization Support */
/***************************************************************************//**
 ** @defgroup Localization Localization Support
 **
 ** These functions help manage localization in Tidy.
 **
 ** @{
 ******************************************************************************/


/** @name Tidy's Locale
 ** @{
 */

/** Tells Tidy to use a different language for output.
 ** @param  languageCode A Windows or POSIX language code, and must match
 **         a TIDY_LANGUAGE for an installed language.
 ** @result Indicates that a setting was applied, but not necessarily the
 **         specific request, i.e., true indicates a language and/or region
 **         was applied. If es_mx is requested but not installed, and es is
 **         installed, then es will be selected and this function will return
 **         true. However the opposite is not true; if es is requested but
 **         not present, Tidy will not try to select from the es_XX variants.
 */
TIDY_EXPORT Bool TIDY_CALL tidySetLanguage( ctmbstr languageCode );

/** Gets the current language used by Tidy.
 ** @result Returns a string indicating the currently set language.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyGetLanguage(void);

/** @}
 ** @name Locale Mappings
 ** @{
 */

/** @struct tidyLocalMapItem
 ** Represents an opaque type we can use for tidyLocaleMapItem, which
 ** is used to iterate through the language list, and used to access
 ** the windowsName() and the posixName().
 */
/* Prevent Doxygen from listing this as a function. */
#ifndef DOXYGEN_SHOULD_SKIP_THIS
opaque_type(tidyLocaleMapItem);
#endif
    
/** Initiates an iterator for a list of Tidy's Windows<->POSIX locale mappings.
 ** This iterator allows you to iterate through this list. In order to
 ** iterate through the list, initiate the iterator with this function, and then
 ** use getNextWindowsLanguage() to retrieve the first and subsequent codes.
 ** For example:
 ** @code{.c}
 **   TidyIterator itList = getWindowsLanguageList();
 **   while ( itList ) {
 **     tidyLocaleMapItem *item = getNextWindowsLanguage( &itList );
 **     // do something such as get the TidyLangWindowsName(item).
 **   }
 ** @endcode
 ** @result Returns a TidyIterator, which is a token used to represent the
 **         current position in a list within LibTidy.
 */
TIDY_EXPORT TidyIterator TIDY_CALL getWindowsLanguageList(void);

/** Given a valid TidyIterator initiated with getWindowsLanguageList(), returns
 ** a pointer to a tidyLocaleMapItem, which can be further interrogated with
 ** TidyLangWindowsName() or TidyLangPosixName().
 ** @param iter The TidyIterator (initiated with getWindowsLanguageList()) token.
 ** @result Returns a pointer to a tidyLocaleMapItem.
 */
TIDY_EXPORT const tidyLocaleMapItem* TIDY_CALL getNextWindowsLanguage( TidyIterator* iter );

/** Given a `tidyLocalMapItem`, return the Windows name.
 ** @param item An instance of tidyLocalMapItem to query.
 ** @result Returns a string with the Windows name of the mapping.
 */
TIDY_EXPORT const ctmbstr TIDY_CALL TidyLangWindowsName( const tidyLocaleMapItem *item );

/** Given a `tidyLocalMapItem`, return the POSIX name.
 ** @param item An instance of tidyLocalMapItem to query.
 ** @result Returns a string with the POSIX name of the mapping.
 */
TIDY_EXPORT const ctmbstr TIDY_CALL TidyLangPosixName( const tidyLocaleMapItem *item );

/** @}
 ** @name Getting Localized Strings
 ** @{
 */

/** Provides a string given `messageType` in the current localization for
 ** `quantity`. Some strings have one or more plural forms, and this function
 ** will ensure that the correct singular or plural form is returned for the
 ** specified quantity.
 ** @result Returns the desired string.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyLocalizedStringN(uint messageType, /**< The message type. */
                                                   uint quantity     /**< The quantity. */
                                                   );

/** Provides a string given `messageType` in the current localization for the
 ** single case.
 ** @param messageType The message type.
 ** @result Returns the desired string.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyLocalizedString( uint messageType );

/** Provides a string given `messageType` in the default localization (which
 ** is `en`).
 ** @param messageType The message type.
 ** @result Returns the desired string.
 */
TIDY_EXPORT ctmbstr TIDY_CALL tidyDefaultString( uint messageType );

/** Initiates an iterator for a list of string key codes available in Tidy.
 ** This iterator allows you to iterate through all of the codes. In order to
 ** iterate through the codes, initiate the iterator with this function, and
 ** then use getNextStringKey() to retrieve the first and subsequent codes.
 ** For example:
 ** @code{.c}
 **   TidyIterator itKey = getErrorCodeList();
 **   while ( itKey ) {
 **     uint code = getNextStringKey( &itKey );
 **     // do something with the code, such as lookup a string.
 **   }
 ** @endcode
 ** @remark These are provided for documentation generation purposes, and
 **         probably aren't of much use to the average LibTidy implementor.
 ** @result Returns a TidyIterator, which is a token used to represent the
 **         current position in a list within LibTidy.
 */
TIDY_EXPORT TidyIterator TIDY_CALL getStringKeyList(void);

/** Given a valid TidyIterator initiated with getStringKeyList(), returns
 ** an unsigned integer representing the next key value.
 ** @remark These are provided for documentation generation purposes, and
 **         probably aren't of much use to the average LibTidy implementor.
 ** @param iter The TidyIterator (initiated with getStringKeyList()) token.
 ** @result Returns a message code.
 */
TIDY_EXPORT uint TIDY_CALL getNextStringKey( TidyIterator* iter );

/** @}
 ** @name Available Languages
 ** @{
 */

/** Initiates an iterator for a list of Tidy's installed languages. This
 ** iterator allows you to iterate through this list. In order to iterate
 ** through the list, initiate the iterator with this function, and then use
 ** use getNextInstalledLanguage() to retrieve the first and subsequent strings.
 ** For example:
 ** @code{.c}
 **   TidyIterator itList = getInstalledLanguageList();
 **   while ( itList ) {
 **     printf("%s",  getNextInstalledLanguage( &itList ));
 **   }
 ** @endcode
 ** @result Returns a TidyIterator, which is a token used to represent the
 **         current position in a list within LibTidy.
 */
TIDY_EXPORT TidyIterator TIDY_CALL getInstalledLanguageList(void);

/** Given a valid TidyIterator initiated with getInstalledLanguageList(),
 ** returns a string representing a language name that is installed in Tidy.
 ** @param iter The TidyIterator (initiated with getInstalledLanguageList())
 **        token.
 ** @result Returns a string indicating the installed language.
 */
TIDY_EXPORT ctmbstr TIDY_CALL getNextInstalledLanguage( TidyIterator* iter );

/** @} */

/** @} end MessagesKeys group */
/** @} end public_api group */


#ifdef __cplusplus
}  /* extern "C" */
#endif
#endif /* __TIDY_H__ */

/*
 * local variables:
 * mode: c
 * indent-tabs-mode: nil
 * c-basic-offset: 4
 * eval: (c-set-offset 'substatement-open 0)
 * end:
 */