1/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
2   See the file COPYING for copying permission.
3*/
4
5#ifdef COMPILED_FROM_DSP
6#include "winconfig.h"
7#elif defined(MACOS_CLASSIC)
8#include "macconfig.h"
9#elif defined(__amigaos4__)
10#include "amigaconfig.h"
11#else
12#ifdef HAVE_EXPAT_CONFIG_H
13#include <expat_config.h>
14#endif
15#endif /* ndef COMPILED_FROM_DSP */
16
17#include <stddef.h>
18
19#include "expat_external.h"
20#include "internal.h"
21#include "xmltok.h"
22#include "nametab.h"
23
24#ifdef XML_DTD
25#define IGNORE_SECTION_TOK_VTABLE , PREFIX(ignoreSectionTok)
26#else
27#define IGNORE_SECTION_TOK_VTABLE /* as nothing */
28#endif
29
30#define VTABLE1 \
31  { PREFIX(prologTok), PREFIX(contentTok), \
32    PREFIX(cdataSectionTok) IGNORE_SECTION_TOK_VTABLE }, \
33  { PREFIX(attributeValueTok), PREFIX(entityValueTok) }, \
34  PREFIX(sameName), \
35  PREFIX(nameMatchesAscii), \
36  PREFIX(nameLength), \
37  PREFIX(skipS), \
38  PREFIX(getAtts), \
39  PREFIX(charRefNumber), \
40  PREFIX(predefinedEntityName), \
41  PREFIX(updatePosition), \
42  PREFIX(isPublicId)
43
44#define VTABLE VTABLE1, PREFIX(toUtf8), PREFIX(toUtf16)
45
46#define UCS2_GET_NAMING(pages, hi, lo) \
47   (namingBitmap[(pages[hi] << 3) + ((lo) >> 5)] & (1 << ((lo) & 0x1F)))
48
49/* A 2 byte UTF-8 representation splits the characters 11 bits between
50   the bottom 5 and 6 bits of the bytes.  We need 8 bits to index into
51   pages, 3 bits to add to that index and 5 bits to generate the mask.
52*/
53#define UTF8_GET_NAMING2(pages, byte) \
54    (namingBitmap[((pages)[(((byte)[0]) >> 2) & 7] << 3) \
55                      + ((((byte)[0]) & 3) << 1) \
56                      + ((((byte)[1]) >> 5) & 1)] \
57         & (1 << (((byte)[1]) & 0x1F)))
58
59/* A 3 byte UTF-8 representation splits the characters 16 bits between
60   the bottom 4, 6 and 6 bits of the bytes.  We need 8 bits to index
61   into pages, 3 bits to add to that index and 5 bits to generate the
62   mask.
63*/
64#define UTF8_GET_NAMING3(pages, byte) \
65  (namingBitmap[((pages)[((((byte)[0]) & 0xF) << 4) \
66                             + ((((byte)[1]) >> 2) & 0xF)] \
67                       << 3) \
68                      + ((((byte)[1]) & 3) << 1) \
69                      + ((((byte)[2]) >> 5) & 1)] \
70         & (1 << (((byte)[2]) & 0x1F)))
71
72#define UTF8_GET_NAMING(pages, p, n) \
73  ((n) == 2 \
74  ? UTF8_GET_NAMING2(pages, (const unsigned char *)(p)) \
75  : ((n) == 3 \
76     ? UTF8_GET_NAMING3(pages, (const unsigned char *)(p)) \
77     : 0))
78
79/* Detection of invalid UTF-8 sequences is based on Table 3.1B
80   of Unicode 3.2: http://www.unicode.org/unicode/reports/tr28/
81   with the additional restriction of not allowing the Unicode
82   code points 0xFFFF and 0xFFFE (sequences EF,BF,BF and EF,BF,BE).
83   Implementation details:
84     (A & 0x80) == 0     means A < 0x80
85   and
86     (A & 0xC0) == 0xC0  means A > 0xBF
87*/
88
89#define UTF8_INVALID2(p) \
90  ((*p) < 0xC2 || ((p)[1] & 0x80) == 0 || ((p)[1] & 0xC0) == 0xC0)
91
92#define UTF8_INVALID3(p) \
93  (((p)[2] & 0x80) == 0 \
94  || \
95  ((*p) == 0xEF && (p)[1] == 0xBF \
96    ? \
97    (p)[2] > 0xBD \
98    : \
99    ((p)[2] & 0xC0) == 0xC0) \
100  || \
101  ((*p) == 0xE0 \
102    ? \
103    (p)[1] < 0xA0 || ((p)[1] & 0xC0) == 0xC0 \
104    : \
105    ((p)[1] & 0x80) == 0 \
106    || \
107    ((*p) == 0xED ? (p)[1] > 0x9F : ((p)[1] & 0xC0) == 0xC0)))
108
109#define UTF8_INVALID4(p) \
110  (((p)[3] & 0x80) == 0 || ((p)[3] & 0xC0) == 0xC0 \
111  || \
112  ((p)[2] & 0x80) == 0 || ((p)[2] & 0xC0) == 0xC0 \
113  || \
114  ((*p) == 0xF0 \
115    ? \
116    (p)[1] < 0x90 || ((p)[1] & 0xC0) == 0xC0 \
117    : \
118    ((p)[1] & 0x80) == 0 \
119    || \
120    ((*p) == 0xF4 ? (p)[1] > 0x8F : ((p)[1] & 0xC0) == 0xC0)))
121
122static int PTRFASTCALL
123isNever(const ENCODING *enc, const char *p)
124{
125  return 0;
126}
127
128static int PTRFASTCALL
129utf8_isName2(const ENCODING *enc, const char *p)
130{
131  return UTF8_GET_NAMING2(namePages, (const unsigned char *)p);
132}
133
134static int PTRFASTCALL
135utf8_isName3(const ENCODING *enc, const char *p)
136{
137  return UTF8_GET_NAMING3(namePages, (const unsigned char *)p);
138}
139
140#define utf8_isName4 isNever
141
142static int PTRFASTCALL
143utf8_isNmstrt2(const ENCODING *enc, const char *p)
144{
145  return UTF8_GET_NAMING2(nmstrtPages, (const unsigned char *)p);
146}
147
148static int PTRFASTCALL
149utf8_isNmstrt3(const ENCODING *enc, const char *p)
150{
151  return UTF8_GET_NAMING3(nmstrtPages, (const unsigned char *)p);
152}
153
154#define utf8_isNmstrt4 isNever
155
156static int PTRFASTCALL
157utf8_isInvalid2(const ENCODING *enc, const char *p)
158{
159  return UTF8_INVALID2((const unsigned char *)p);
160}
161
162static int PTRFASTCALL
163utf8_isInvalid3(const ENCODING *enc, const char *p)
164{
165  return UTF8_INVALID3((const unsigned char *)p);
166}
167
168static int PTRFASTCALL
169utf8_isInvalid4(const ENCODING *enc, const char *p)
170{
171  return UTF8_INVALID4((const unsigned char *)p);
172}
173
174struct normal_encoding {
175  ENCODING enc;
176  unsigned char type[256];
177#ifdef XML_MIN_SIZE
178  int (PTRFASTCALL *byteType)(const ENCODING *, const char *);
179  int (PTRFASTCALL *isNameMin)(const ENCODING *, const char *);
180  int (PTRFASTCALL *isNmstrtMin)(const ENCODING *, const char *);
181  int (PTRFASTCALL *byteToAscii)(const ENCODING *, const char *);
182  int (PTRCALL *charMatches)(const ENCODING *, const char *, int);
183#endif /* XML_MIN_SIZE */
184  int (PTRFASTCALL *isName2)(const ENCODING *, const char *);
185  int (PTRFASTCALL *isName3)(const ENCODING *, const char *);
186  int (PTRFASTCALL *isName4)(const ENCODING *, const char *);
187  int (PTRFASTCALL *isNmstrt2)(const ENCODING *, const char *);
188  int (PTRFASTCALL *isNmstrt3)(const ENCODING *, const char *);
189  int (PTRFASTCALL *isNmstrt4)(const ENCODING *, const char *);
190  int (PTRFASTCALL *isInvalid2)(const ENCODING *, const char *);
191  int (PTRFASTCALL *isInvalid3)(const ENCODING *, const char *);
192  int (PTRFASTCALL *isInvalid4)(const ENCODING *, const char *);
193};
194
195#define AS_NORMAL_ENCODING(enc)   ((const struct normal_encoding *) (enc))
196
197#ifdef XML_MIN_SIZE
198
199#define STANDARD_VTABLE(E) \
200 E ## byteType, \
201 E ## isNameMin, \
202 E ## isNmstrtMin, \
203 E ## byteToAscii, \
204 E ## charMatches,
205
206#else
207
208#define STANDARD_VTABLE(E) /* as nothing */
209
210#endif
211
212#define NORMAL_VTABLE(E) \
213 E ## isName2, \
214 E ## isName3, \
215 E ## isName4, \
216 E ## isNmstrt2, \
217 E ## isNmstrt3, \
218 E ## isNmstrt4, \
219 E ## isInvalid2, \
220 E ## isInvalid3, \
221 E ## isInvalid4
222
223static int FASTCALL checkCharRefNumber(int);
224
225#include "xmltok_impl.h"
226#include "ascii.h"
227
228#ifdef XML_MIN_SIZE
229#define sb_isNameMin isNever
230#define sb_isNmstrtMin isNever
231#endif
232
233#ifdef XML_MIN_SIZE
234#define MINBPC(enc) ((enc)->minBytesPerChar)
235#else
236/* minimum bytes per character */
237#define MINBPC(enc) 1
238#endif
239
240#define SB_BYTE_TYPE(enc, p) \
241  (((struct normal_encoding *)(enc))->type[(unsigned char)*(p)])
242
243#ifdef XML_MIN_SIZE
244static int PTRFASTCALL
245sb_byteType(const ENCODING *enc, const char *p)
246{
247  return SB_BYTE_TYPE(enc, p);
248}
249#define BYTE_TYPE(enc, p) \
250 (AS_NORMAL_ENCODING(enc)->byteType(enc, p))
251#else
252#define BYTE_TYPE(enc, p) SB_BYTE_TYPE(enc, p)
253#endif
254
255#ifdef XML_MIN_SIZE
256#define BYTE_TO_ASCII(enc, p) \
257 (AS_NORMAL_ENCODING(enc)->byteToAscii(enc, p))
258static int PTRFASTCALL
259sb_byteToAscii(const ENCODING *enc, const char *p)
260{
261  return *p;
262}
263#else
264#define BYTE_TO_ASCII(enc, p) (*(p))
265#endif
266
267#define IS_NAME_CHAR(enc, p, n) \
268 (AS_NORMAL_ENCODING(enc)->isName ## n(enc, p))
269#define IS_NMSTRT_CHAR(enc, p, n) \
270 (AS_NORMAL_ENCODING(enc)->isNmstrt ## n(enc, p))
271#define IS_INVALID_CHAR(enc, p, n) \
272 (AS_NORMAL_ENCODING(enc)->isInvalid ## n(enc, p))
273
274#ifdef XML_MIN_SIZE
275#define IS_NAME_CHAR_MINBPC(enc, p) \
276 (AS_NORMAL_ENCODING(enc)->isNameMin(enc, p))
277#define IS_NMSTRT_CHAR_MINBPC(enc, p) \
278 (AS_NORMAL_ENCODING(enc)->isNmstrtMin(enc, p))
279#else
280#define IS_NAME_CHAR_MINBPC(enc, p) (0)
281#define IS_NMSTRT_CHAR_MINBPC(enc, p) (0)
282#endif
283
284#ifdef XML_MIN_SIZE
285#define CHAR_MATCHES(enc, p, c) \
286 (AS_NORMAL_ENCODING(enc)->charMatches(enc, p, c))
287static int PTRCALL
288sb_charMatches(const ENCODING *enc, const char *p, int c)
289{
290  return *p == c;
291}
292#else
293/* c is an ASCII character */
294#define CHAR_MATCHES(enc, p, c) (*(p) == c)
295#endif
296
297#define PREFIX(ident) normal_ ## ident
298#include "xmltok_impl.c"
299
300#undef MINBPC
301#undef BYTE_TYPE
302#undef BYTE_TO_ASCII
303#undef CHAR_MATCHES
304#undef IS_NAME_CHAR
305#undef IS_NAME_CHAR_MINBPC
306#undef IS_NMSTRT_CHAR
307#undef IS_NMSTRT_CHAR_MINBPC
308#undef IS_INVALID_CHAR
309
310enum {  /* UTF8_cvalN is value of masked first byte of N byte sequence */
311  UTF8_cval1 = 0x00,
312  UTF8_cval2 = 0xc0,
313  UTF8_cval3 = 0xe0,
314  UTF8_cval4 = 0xf0
315};
316
317static void PTRCALL
318utf8_toUtf8(const ENCODING *enc,
319            const char **fromP, const char *fromLim,
320            char **toP, const char *toLim)
321{
322  char *to;
323  const char *from;
324  if (fromLim - *fromP > toLim - *toP) {
325    /* Avoid copying partial characters. */
326    for (fromLim = *fromP + (toLim - *toP); fromLim > *fromP; fromLim--)
327      if (((unsigned char)fromLim[-1] & 0xc0) != 0x80)
328        break;
329  }
330  for (to = *toP, from = *fromP; from != fromLim; from++, to++)
331    *to = *from;
332  *fromP = from;
333  *toP = to;
334}
335
336static void PTRCALL
337utf8_toUtf16(const ENCODING *enc,
338             const char **fromP, const char *fromLim,
339             unsigned short **toP, const unsigned short *toLim)
340{
341  unsigned short *to = *toP;
342  const char *from = *fromP;
343  while (from != fromLim && to != toLim) {
344    switch (((struct normal_encoding *)enc)->type[(unsigned char)*from]) {
345    case BT_LEAD2:
346      *to++ = (unsigned short)(((from[0] & 0x1f) << 6) | (from[1] & 0x3f));
347      from += 2;
348      break;
349    case BT_LEAD3:
350      *to++ = (unsigned short)(((from[0] & 0xf) << 12)
351                               | ((from[1] & 0x3f) << 6) | (from[2] & 0x3f));
352      from += 3;
353      break;
354    case BT_LEAD4:
355      {
356        unsigned long n;
357        if (to + 1 == toLim)
358          goto after;
359        n = ((from[0] & 0x7) << 18) | ((from[1] & 0x3f) << 12)
360            | ((from[2] & 0x3f) << 6) | (from[3] & 0x3f);
361        n -= 0x10000;
362        to[0] = (unsigned short)((n >> 10) | 0xD800);
363        to[1] = (unsigned short)((n & 0x3FF) | 0xDC00);
364        to += 2;
365        from += 4;
366      }
367      break;
368    default:
369      *to++ = *from++;
370      break;
371    }
372  }
373after:
374  *fromP = from;
375  *toP = to;
376}
377
378#ifdef XML_NS
379static const struct normal_encoding utf8_encoding_ns = {
380  { VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
381  {
382#include "asciitab.h"
383#include "utf8tab.h"
384  },
385  STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
386};
387#endif
388
389static const struct normal_encoding utf8_encoding = {
390  { VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
391  {
392#define BT_COLON BT_NMSTRT
393#include "asciitab.h"
394#undef BT_COLON
395#include "utf8tab.h"
396  },
397  STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
398};
399
400#ifdef XML_NS
401
402static const struct normal_encoding internal_utf8_encoding_ns = {
403  { VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
404  {
405#include "iasciitab.h"
406#include "utf8tab.h"
407  },
408  STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
409};
410
411#endif
412
413static const struct normal_encoding internal_utf8_encoding = {
414  { VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
415  {
416#define BT_COLON BT_NMSTRT
417#include "iasciitab.h"
418#undef BT_COLON
419#include "utf8tab.h"
420  },
421  STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
422};
423
424static void PTRCALL
425latin1_toUtf8(const ENCODING *enc,
426              const char **fromP, const char *fromLim,
427              char **toP, const char *toLim)
428{
429  for (;;) {
430    unsigned char c;
431    if (*fromP == fromLim)
432      break;
433    c = (unsigned char)**fromP;
434    if (c & 0x80) {
435      if (toLim - *toP < 2)
436        break;
437      *(*toP)++ = (char)((c >> 6) | UTF8_cval2);
438      *(*toP)++ = (char)((c & 0x3f) | 0x80);
439      (*fromP)++;
440    }
441    else {
442      if (*toP == toLim)
443        break;
444      *(*toP)++ = *(*fromP)++;
445    }
446  }
447}
448
449static void PTRCALL
450latin1_toUtf16(const ENCODING *enc,
451               const char **fromP, const char *fromLim,
452               unsigned short **toP, const unsigned short *toLim)
453{
454  while (*fromP != fromLim && *toP != toLim)
455    *(*toP)++ = (unsigned char)*(*fromP)++;
456}
457
458#ifdef XML_NS
459
460static const struct normal_encoding latin1_encoding_ns = {
461  { VTABLE1, latin1_toUtf8, latin1_toUtf16, 1, 0, 0 },
462  {
463#include "asciitab.h"
464#include "latin1tab.h"
465  },
466  STANDARD_VTABLE(sb_)
467};
468
469#endif
470
471static const struct normal_encoding latin1_encoding = {
472  { VTABLE1, latin1_toUtf8, latin1_toUtf16, 1, 0, 0 },
473  {
474#define BT_COLON BT_NMSTRT
475#include "asciitab.h"
476#undef BT_COLON
477#include "latin1tab.h"
478  },
479  STANDARD_VTABLE(sb_)
480};
481
482static void PTRCALL
483ascii_toUtf8(const ENCODING *enc,
484             const char **fromP, const char *fromLim,
485             char **toP, const char *toLim)
486{
487  while (*fromP != fromLim && *toP != toLim)
488    *(*toP)++ = *(*fromP)++;
489}
490
491#ifdef XML_NS
492
493static const struct normal_encoding ascii_encoding_ns = {
494  { VTABLE1, ascii_toUtf8, latin1_toUtf16, 1, 1, 0 },
495  {
496#include "asciitab.h"
497/* BT_NONXML == 0 */
498  },
499  STANDARD_VTABLE(sb_)
500};
501
502#endif
503
504static const struct normal_encoding ascii_encoding = {
505  { VTABLE1, ascii_toUtf8, latin1_toUtf16, 1, 1, 0 },
506  {
507#define BT_COLON BT_NMSTRT
508#include "asciitab.h"
509#undef BT_COLON
510/* BT_NONXML == 0 */
511  },
512  STANDARD_VTABLE(sb_)
513};
514
515static int PTRFASTCALL
516unicode_byte_type(char hi, char lo)
517{
518  switch ((unsigned char)hi) {
519  case 0xD8: case 0xD9: case 0xDA: case 0xDB:
520    return BT_LEAD4;
521  case 0xDC: case 0xDD: case 0xDE: case 0xDF:
522    return BT_TRAIL;
523  case 0xFF:
524    switch ((unsigned char)lo) {
525    case 0xFF:
526    case 0xFE:
527      return BT_NONXML;
528    }
529    break;
530  }
531  return BT_NONASCII;
532}
533
534#define DEFINE_UTF16_TO_UTF8(E) \
535static void  PTRCALL \
536E ## toUtf8(const ENCODING *enc, \
537            const char **fromP, const char *fromLim, \
538            char **toP, const char *toLim) \
539{ \
540  const char *from; \
541  for (from = *fromP; from != fromLim; from += 2) { \
542    int plane; \
543    unsigned char lo2; \
544    unsigned char lo = GET_LO(from); \
545    unsigned char hi = GET_HI(from); \
546    switch (hi) { \
547    case 0: \
548      if (lo < 0x80) { \
549        if (*toP == toLim) { \
550          *fromP = from; \
551          return; \
552        } \
553        *(*toP)++ = lo; \
554        break; \
555      } \
556      /* fall through */ \
557    case 0x1: case 0x2: case 0x3: \
558    case 0x4: case 0x5: case 0x6: case 0x7: \
559      if (toLim -  *toP < 2) { \
560        *fromP = from; \
561        return; \
562      } \
563      *(*toP)++ = ((lo >> 6) | (hi << 2) |  UTF8_cval2); \
564      *(*toP)++ = ((lo & 0x3f) | 0x80); \
565      break; \
566    default: \
567      if (toLim -  *toP < 3)  { \
568        *fromP = from; \
569        return; \
570      } \
571      /* 16 bits divided 4, 6, 6 amongst 3 bytes */ \
572      *(*toP)++ = ((hi >> 4) | UTF8_cval3); \
573      *(*toP)++ = (((hi & 0xf) << 2) | (lo >> 6) | 0x80); \
574      *(*toP)++ = ((lo & 0x3f) | 0x80); \
575      break; \
576    case 0xD8: case 0xD9: case 0xDA: case 0xDB: \
577      if (toLim -  *toP < 4) { \
578        *fromP = from; \
579        return; \
580      } \
581      plane = (((hi & 0x3) << 2) | ((lo >> 6) & 0x3)) + 1; \
582      *(*toP)++ = ((plane >> 2) | UTF8_cval4); \
583      *(*toP)++ = (((lo >> 2) & 0xF) | ((plane & 0x3) << 4) | 0x80); \
584      from += 2; \
585      lo2 = GET_LO(from); \
586      *(*toP)++ = (((lo & 0x3) << 4) \
587                   | ((GET_HI(from) & 0x3) << 2) \
588                   | (lo2 >> 6) \
589                   | 0x80); \
590      *(*toP)++ = ((lo2 & 0x3f) | 0x80); \
591      break; \
592    } \
593  } \
594  *fromP = from; \
595}
596
597#define DEFINE_UTF16_TO_UTF16(E) \
598static void  PTRCALL \
599E ## toUtf16(const ENCODING *enc, \
600             const char **fromP, const char *fromLim, \
601             unsigned short **toP, const unsigned short *toLim) \
602{ \
603  /* Avoid copying first half only of surrogate */ \
604  if (fromLim - *fromP > ((toLim - *toP) << 1) \
605      && (GET_HI(fromLim - 2) & 0xF8) == 0xD8) \
606    fromLim -= 2; \
607  for (; *fromP != fromLim && *toP != toLim; *fromP += 2) \
608    *(*toP)++ = (GET_HI(*fromP) << 8) | GET_LO(*fromP); \
609}
610
611#define SET2(ptr, ch) \
612  (((ptr)[0] = ((ch) & 0xff)), ((ptr)[1] = ((ch) >> 8)))
613#define GET_LO(ptr) ((unsigned char)(ptr)[0])
614#define GET_HI(ptr) ((unsigned char)(ptr)[1])
615
616DEFINE_UTF16_TO_UTF8(little2_)
617DEFINE_UTF16_TO_UTF16(little2_)
618
619#undef SET2
620#undef GET_LO
621#undef GET_HI
622
623#define SET2(ptr, ch) \
624  (((ptr)[0] = ((ch) >> 8)), ((ptr)[1] = ((ch) & 0xFF)))
625#define GET_LO(ptr) ((unsigned char)(ptr)[1])
626#define GET_HI(ptr) ((unsigned char)(ptr)[0])
627
628DEFINE_UTF16_TO_UTF8(big2_)
629DEFINE_UTF16_TO_UTF16(big2_)
630
631#undef SET2
632#undef GET_LO
633#undef GET_HI
634
635#define LITTLE2_BYTE_TYPE(enc, p) \
636 ((p)[1] == 0 \
637  ? ((struct normal_encoding *)(enc))->type[(unsigned char)*(p)] \
638  : unicode_byte_type((p)[1], (p)[0]))
639#define LITTLE2_BYTE_TO_ASCII(enc, p) ((p)[1] == 0 ? (p)[0] : -1)
640#define LITTLE2_CHAR_MATCHES(enc, p, c) ((p)[1] == 0 && (p)[0] == c)
641#define LITTLE2_IS_NAME_CHAR_MINBPC(enc, p) \
642  UCS2_GET_NAMING(namePages, (unsigned char)p[1], (unsigned char)p[0])
643#define LITTLE2_IS_NMSTRT_CHAR_MINBPC(enc, p) \
644  UCS2_GET_NAMING(nmstrtPages, (unsigned char)p[1], (unsigned char)p[0])
645
646#ifdef XML_MIN_SIZE
647
648static int PTRFASTCALL
649little2_byteType(const ENCODING *enc, const char *p)
650{
651  return LITTLE2_BYTE_TYPE(enc, p);
652}
653
654static int PTRFASTCALL
655little2_byteToAscii(const ENCODING *enc, const char *p)
656{
657  return LITTLE2_BYTE_TO_ASCII(enc, p);
658}
659
660static int PTRCALL
661little2_charMatches(const ENCODING *enc, const char *p, int c)
662{
663  return LITTLE2_CHAR_MATCHES(enc, p, c);
664}
665
666static int PTRFASTCALL
667little2_isNameMin(const ENCODING *enc, const char *p)
668{
669  return LITTLE2_IS_NAME_CHAR_MINBPC(enc, p);
670}
671
672static int PTRFASTCALL
673little2_isNmstrtMin(const ENCODING *enc, const char *p)
674{
675  return LITTLE2_IS_NMSTRT_CHAR_MINBPC(enc, p);
676}
677
678#undef VTABLE
679#define VTABLE VTABLE1, little2_toUtf8, little2_toUtf16
680
681#else /* not XML_MIN_SIZE */
682
683#undef PREFIX
684#define PREFIX(ident) little2_ ## ident
685#define MINBPC(enc) 2
686/* CHAR_MATCHES is guaranteed to have MINBPC bytes available. */
687#define BYTE_TYPE(enc, p) LITTLE2_BYTE_TYPE(enc, p)
688#define BYTE_TO_ASCII(enc, p) LITTLE2_BYTE_TO_ASCII(enc, p)
689#define CHAR_MATCHES(enc, p, c) LITTLE2_CHAR_MATCHES(enc, p, c)
690#define IS_NAME_CHAR(enc, p, n) 0
691#define IS_NAME_CHAR_MINBPC(enc, p) LITTLE2_IS_NAME_CHAR_MINBPC(enc, p)
692#define IS_NMSTRT_CHAR(enc, p, n) (0)
693#define IS_NMSTRT_CHAR_MINBPC(enc, p) LITTLE2_IS_NMSTRT_CHAR_MINBPC(enc, p)
694
695#include "xmltok_impl.c"
696
697#undef MINBPC
698#undef BYTE_TYPE
699#undef BYTE_TO_ASCII
700#undef CHAR_MATCHES
701#undef IS_NAME_CHAR
702#undef IS_NAME_CHAR_MINBPC
703#undef IS_NMSTRT_CHAR
704#undef IS_NMSTRT_CHAR_MINBPC
705#undef IS_INVALID_CHAR
706
707#endif /* not XML_MIN_SIZE */
708
709#ifdef XML_NS
710
711static const struct normal_encoding little2_encoding_ns = {
712  { VTABLE, 2, 0,
713#if BYTEORDER == 1234
714    1
715#else
716    0
717#endif
718  },
719  {
720#include "asciitab.h"
721#include "latin1tab.h"
722  },
723  STANDARD_VTABLE(little2_)
724};
725
726#endif
727
728static const struct normal_encoding little2_encoding = {
729  { VTABLE, 2, 0,
730#if BYTEORDER == 1234
731    1
732#else
733    0
734#endif
735  },
736  {
737#define BT_COLON BT_NMSTRT
738#include "asciitab.h"
739#undef BT_COLON
740#include "latin1tab.h"
741  },
742  STANDARD_VTABLE(little2_)
743};
744
745#if BYTEORDER != 4321
746
747#ifdef XML_NS
748
749static const struct normal_encoding internal_little2_encoding_ns = {
750  { VTABLE, 2, 0, 1 },
751  {
752#include "iasciitab.h"
753#include "latin1tab.h"
754  },
755  STANDARD_VTABLE(little2_)
756};
757
758#endif
759
760static const struct normal_encoding internal_little2_encoding = {
761  { VTABLE, 2, 0, 1 },
762  {
763#define BT_COLON BT_NMSTRT
764#include "iasciitab.h"
765#undef BT_COLON
766#include "latin1tab.h"
767  },
768  STANDARD_VTABLE(little2_)
769};
770
771#endif
772
773
774#define BIG2_BYTE_TYPE(enc, p) \
775 ((p)[0] == 0 \
776  ? ((struct normal_encoding *)(enc))->type[(unsigned char)(p)[1]] \
777  : unicode_byte_type((p)[0], (p)[1]))
778#define BIG2_BYTE_TO_ASCII(enc, p) ((p)[0] == 0 ? (p)[1] : -1)
779#define BIG2_CHAR_MATCHES(enc, p, c) ((p)[0] == 0 && (p)[1] == c)
780#define BIG2_IS_NAME_CHAR_MINBPC(enc, p) \
781  UCS2_GET_NAMING(namePages, (unsigned char)p[0], (unsigned char)p[1])
782#define BIG2_IS_NMSTRT_CHAR_MINBPC(enc, p) \
783  UCS2_GET_NAMING(nmstrtPages, (unsigned char)p[0], (unsigned char)p[1])
784
785#ifdef XML_MIN_SIZE
786
787static int PTRFASTCALL
788big2_byteType(const ENCODING *enc, const char *p)
789{
790  return BIG2_BYTE_TYPE(enc, p);
791}
792
793static int PTRFASTCALL
794big2_byteToAscii(const ENCODING *enc, const char *p)
795{
796  return BIG2_BYTE_TO_ASCII(enc, p);
797}
798
799static int PTRCALL
800big2_charMatches(const ENCODING *enc, const char *p, int c)
801{
802  return BIG2_CHAR_MATCHES(enc, p, c);
803}
804
805static int PTRFASTCALL
806big2_isNameMin(const ENCODING *enc, const char *p)
807{
808  return BIG2_IS_NAME_CHAR_MINBPC(enc, p);
809}
810
811static int PTRFASTCALL
812big2_isNmstrtMin(const ENCODING *enc, const char *p)
813{
814  return BIG2_IS_NMSTRT_CHAR_MINBPC(enc, p);
815}
816
817#undef VTABLE
818#define VTABLE VTABLE1, big2_toUtf8, big2_toUtf16
819
820#else /* not XML_MIN_SIZE */
821
822#undef PREFIX
823#define PREFIX(ident) big2_ ## ident
824#define MINBPC(enc) 2
825/* CHAR_MATCHES is guaranteed to have MINBPC bytes available. */
826#define BYTE_TYPE(enc, p) BIG2_BYTE_TYPE(enc, p)
827#define BYTE_TO_ASCII(enc, p) BIG2_BYTE_TO_ASCII(enc, p)
828#define CHAR_MATCHES(enc, p, c) BIG2_CHAR_MATCHES(enc, p, c)
829#define IS_NAME_CHAR(enc, p, n) 0
830#define IS_NAME_CHAR_MINBPC(enc, p) BIG2_IS_NAME_CHAR_MINBPC(enc, p)
831#define IS_NMSTRT_CHAR(enc, p, n) (0)
832#define IS_NMSTRT_CHAR_MINBPC(enc, p) BIG2_IS_NMSTRT_CHAR_MINBPC(enc, p)
833
834#include "xmltok_impl.c"
835
836#undef MINBPC
837#undef BYTE_TYPE
838#undef BYTE_TO_ASCII
839#undef CHAR_MATCHES
840#undef IS_NAME_CHAR
841#undef IS_NAME_CHAR_MINBPC
842#undef IS_NMSTRT_CHAR
843#undef IS_NMSTRT_CHAR_MINBPC
844#undef IS_INVALID_CHAR
845
846#endif /* not XML_MIN_SIZE */
847
848#ifdef XML_NS
849
850static const struct normal_encoding big2_encoding_ns = {
851  { VTABLE, 2, 0,
852#if BYTEORDER == 4321
853  1
854#else
855  0
856#endif
857  },
858  {
859#include "asciitab.h"
860#include "latin1tab.h"
861  },
862  STANDARD_VTABLE(big2_)
863};
864
865#endif
866
867static const struct normal_encoding big2_encoding = {
868  { VTABLE, 2, 0,
869#if BYTEORDER == 4321
870  1
871#else
872  0
873#endif
874  },
875  {
876#define BT_COLON BT_NMSTRT
877#include "asciitab.h"
878#undef BT_COLON
879#include "latin1tab.h"
880  },
881  STANDARD_VTABLE(big2_)
882};
883
884#if BYTEORDER != 1234
885
886#ifdef XML_NS
887
888static const struct normal_encoding internal_big2_encoding_ns = {
889  { VTABLE, 2, 0, 1 },
890  {
891#include "iasciitab.h"
892#include "latin1tab.h"
893  },
894  STANDARD_VTABLE(big2_)
895};
896
897#endif
898
899static const struct normal_encoding internal_big2_encoding = {
900  { VTABLE, 2, 0, 1 },
901  {
902#define BT_COLON BT_NMSTRT
903#include "iasciitab.h"
904#undef BT_COLON
905#include "latin1tab.h"
906  },
907  STANDARD_VTABLE(big2_)
908};
909
910#endif
911
912#undef PREFIX
913
914static int FASTCALL
915streqci(const char *s1, const char *s2)
916{
917  for (;;) {
918    char c1 = *s1++;
919    char c2 = *s2++;
920    if (ASCII_a <= c1 && c1 <= ASCII_z)
921      c1 += ASCII_A - ASCII_a;
922    if (ASCII_a <= c2 && c2 <= ASCII_z)
923      c2 += ASCII_A - ASCII_a;
924    if (c1 != c2)
925      return 0;
926    if (!c1)
927      break;
928  }
929  return 1;
930}
931
932static void PTRCALL
933initUpdatePosition(const ENCODING *enc, const char *ptr,
934                   const char *end, POSITION *pos)
935{
936  normal_updatePosition(&utf8_encoding.enc, ptr, end, pos);
937}
938
939static int
940toAscii(const ENCODING *enc, const char *ptr, const char *end)
941{
942  char buf[1];
943  char *p = buf;
944  XmlUtf8Convert(enc, &ptr, end, &p, p + 1);
945  if (p == buf)
946    return -1;
947  else
948    return buf[0];
949}
950
951static int FASTCALL
952isSpace(int c)
953{
954  switch (c) {
955  case 0x20:
956  case 0xD:
957  case 0xA:
958  case 0x9:
959    return 1;
960  }
961  return 0;
962}
963
964/* Return 1 if there's just optional white space or there's an S
965   followed by name=val.
966*/
967static int
968parsePseudoAttribute(const ENCODING *enc,
969                     const char *ptr,
970                     const char *end,
971                     const char **namePtr,
972                     const char **nameEndPtr,
973                     const char **valPtr,
974                     const char **nextTokPtr)
975{
976  int c;
977  char open;
978  if (ptr == end) {
979    *namePtr = NULL;
980    return 1;
981  }
982  if (!isSpace(toAscii(enc, ptr, end))) {
983    *nextTokPtr = ptr;
984    return 0;
985  }
986  do {
987    ptr += enc->minBytesPerChar;
988  } while (isSpace(toAscii(enc, ptr, end)));
989  if (ptr == end) {
990    *namePtr = NULL;
991    return 1;
992  }
993  *namePtr = ptr;
994  for (;;) {
995    c = toAscii(enc, ptr, end);
996    if (c == -1) {
997      *nextTokPtr = ptr;
998      return 0;
999    }
1000    if (c == ASCII_EQUALS) {
1001      *nameEndPtr = ptr;
1002      break;
1003    }
1004    if (isSpace(c)) {
1005      *nameEndPtr = ptr;
1006      do {
1007        ptr += enc->minBytesPerChar;
1008      } while (isSpace(c = toAscii(enc, ptr, end)));
1009      if (c != ASCII_EQUALS) {
1010        *nextTokPtr = ptr;
1011        return 0;
1012      }
1013      break;
1014    }
1015    ptr += enc->minBytesPerChar;
1016  }
1017  if (ptr == *namePtr) {
1018    *nextTokPtr = ptr;
1019    return 0;
1020  }
1021  ptr += enc->minBytesPerChar;
1022  c = toAscii(enc, ptr, end);
1023  while (isSpace(c)) {
1024    ptr += enc->minBytesPerChar;
1025    c = toAscii(enc, ptr, end);
1026  }
1027  if (c != ASCII_QUOT && c != ASCII_APOS) {
1028    *nextTokPtr = ptr;
1029    return 0;
1030  }
1031  open = (char)c;
1032  ptr += enc->minBytesPerChar;
1033  *valPtr = ptr;
1034  for (;; ptr += enc->minBytesPerChar) {
1035    c = toAscii(enc, ptr, end);
1036    if (c == open)
1037      break;
1038    if (!(ASCII_a <= c && c <= ASCII_z)
1039        && !(ASCII_A <= c && c <= ASCII_Z)
1040        && !(ASCII_0 <= c && c <= ASCII_9)
1041        && c != ASCII_PERIOD
1042        && c != ASCII_MINUS
1043        && c != ASCII_UNDERSCORE) {
1044      *nextTokPtr = ptr;
1045      return 0;
1046    }
1047  }
1048  *nextTokPtr = ptr + enc->minBytesPerChar;
1049  return 1;
1050}
1051
1052static const char KW_version[] = {
1053  ASCII_v, ASCII_e, ASCII_r, ASCII_s, ASCII_i, ASCII_o, ASCII_n, '\0'
1054};
1055
1056static const char KW_encoding[] = {
1057  ASCII_e, ASCII_n, ASCII_c, ASCII_o, ASCII_d, ASCII_i, ASCII_n, ASCII_g, '\0'
1058};
1059
1060static const char KW_standalone[] = {
1061  ASCII_s, ASCII_t, ASCII_a, ASCII_n, ASCII_d, ASCII_a, ASCII_l, ASCII_o,
1062  ASCII_n, ASCII_e, '\0'
1063};
1064
1065static const char KW_yes[] = {
1066  ASCII_y, ASCII_e, ASCII_s,  '\0'
1067};
1068
1069static const char KW_no[] = {
1070  ASCII_n, ASCII_o,  '\0'
1071};
1072
1073static int
1074doParseXmlDecl(const ENCODING *(*encodingFinder)(const ENCODING *,
1075                                                 const char *,
1076                                                 const char *),
1077               int isGeneralTextEntity,
1078               const ENCODING *enc,
1079               const char *ptr,
1080               const char *end,
1081               const char **badPtr,
1082               const char **versionPtr,
1083               const char **versionEndPtr,
1084               const char **encodingName,
1085               const ENCODING **encoding,
1086               int *standalone)
1087{
1088  const char *val = NULL;
1089  const char *name = NULL;
1090  const char *nameEnd = NULL;
1091  ptr += 5 * enc->minBytesPerChar;
1092  end -= 2 * enc->minBytesPerChar;
1093  if (!parsePseudoAttribute(enc, ptr, end, &name, &nameEnd, &val, &ptr)
1094      || !name) {
1095    *badPtr = ptr;
1096    return 0;
1097  }
1098  if (!XmlNameMatchesAscii(enc, name, nameEnd, KW_version)) {
1099    if (!isGeneralTextEntity) {
1100      *badPtr = name;
1101      return 0;
1102    }
1103  }
1104  else {
1105    if (versionPtr)
1106      *versionPtr = val;
1107    if (versionEndPtr)
1108      *versionEndPtr = ptr;
1109    if (!parsePseudoAttribute(enc, ptr, end, &name, &nameEnd, &val, &ptr)) {
1110      *badPtr = ptr;
1111      return 0;
1112    }
1113    if (!name) {
1114      if (isGeneralTextEntity) {
1115        /* a TextDecl must have an EncodingDecl */
1116        *badPtr = ptr;
1117        return 0;
1118      }
1119      return 1;
1120    }
1121  }
1122  if (XmlNameMatchesAscii(enc, name, nameEnd, KW_encoding)) {
1123    int c = toAscii(enc, val, end);
1124    if (!(ASCII_a <= c && c <= ASCII_z) && !(ASCII_A <= c && c <= ASCII_Z)) {
1125      *badPtr = val;
1126      return 0;
1127    }
1128    if (encodingName)
1129      *encodingName = val;
1130    if (encoding)
1131      *encoding = encodingFinder(enc, val, ptr - enc->minBytesPerChar);
1132    if (!parsePseudoAttribute(enc, ptr, end, &name, &nameEnd, &val, &ptr)) {
1133      *badPtr = ptr;
1134      return 0;
1135    }
1136    if (!name)
1137      return 1;
1138  }
1139  if (!XmlNameMatchesAscii(enc, name, nameEnd, KW_standalone)
1140      || isGeneralTextEntity) {
1141    *badPtr = name;
1142    return 0;
1143  }
1144  if (XmlNameMatchesAscii(enc, val, ptr - enc->minBytesPerChar, KW_yes)) {
1145    if (standalone)
1146      *standalone = 1;
1147  }
1148  else if (XmlNameMatchesAscii(enc, val, ptr - enc->minBytesPerChar, KW_no)) {
1149    if (standalone)
1150      *standalone = 0;
1151  }
1152  else {
1153    *badPtr = val;
1154    return 0;
1155  }
1156  while (isSpace(toAscii(enc, ptr, end)))
1157    ptr += enc->minBytesPerChar;
1158  if (ptr != end) {
1159    *badPtr = ptr;
1160    return 0;
1161  }
1162  return 1;
1163}
1164
1165static int FASTCALL
1166checkCharRefNumber(int result)
1167{
1168  switch (result >> 8) {
1169  case 0xD8: case 0xD9: case 0xDA: case 0xDB:
1170  case 0xDC: case 0xDD: case 0xDE: case 0xDF:
1171    return -1;
1172  case 0:
1173    if (latin1_encoding.type[result] == BT_NONXML)
1174      return -1;
1175    break;
1176  case 0xFF:
1177    if (result == 0xFFFE || result == 0xFFFF)
1178      return -1;
1179    break;
1180  }
1181  return result;
1182}
1183
1184int FASTCALL
1185XmlUtf8Encode(int c, char *buf)
1186{
1187  enum {
1188    /* minN is minimum legal resulting value for N byte sequence */
1189    min2 = 0x80,
1190    min3 = 0x800,
1191    min4 = 0x10000
1192  };
1193
1194  if (c < 0)
1195    return 0;
1196  if (c < min2) {
1197    buf[0] = (char)(c | UTF8_cval1);
1198    return 1;
1199  }
1200  if (c < min3) {
1201    buf[0] = (char)((c >> 6) | UTF8_cval2);
1202    buf[1] = (char)((c & 0x3f) | 0x80);
1203    return 2;
1204  }
1205  if (c < min4) {
1206    buf[0] = (char)((c >> 12) | UTF8_cval3);
1207    buf[1] = (char)(((c >> 6) & 0x3f) | 0x80);
1208    buf[2] = (char)((c & 0x3f) | 0x80);
1209    return 3;
1210  }
1211  if (c < 0x110000) {
1212    buf[0] = (char)((c >> 18) | UTF8_cval4);
1213    buf[1] = (char)(((c >> 12) & 0x3f) | 0x80);
1214    buf[2] = (char)(((c >> 6) & 0x3f) | 0x80);
1215    buf[3] = (char)((c & 0x3f) | 0x80);
1216    return 4;
1217  }
1218  return 0;
1219}
1220
1221int FASTCALL
1222XmlUtf16Encode(int charNum, unsigned short *buf)
1223{
1224  if (charNum < 0)
1225    return 0;
1226  if (charNum < 0x10000) {
1227    buf[0] = (unsigned short)charNum;
1228    return 1;
1229  }
1230  if (charNum < 0x110000) {
1231    charNum -= 0x10000;
1232    buf[0] = (unsigned short)((charNum >> 10) + 0xD800);
1233    buf[1] = (unsigned short)((charNum & 0x3FF) + 0xDC00);
1234    return 2;
1235  }
1236  return 0;
1237}
1238
1239struct unknown_encoding {
1240  struct normal_encoding normal;
1241  CONVERTER convert;
1242  void *userData;
1243  unsigned short utf16[256];
1244  char utf8[256][4];
1245};
1246
1247#define AS_UNKNOWN_ENCODING(enc)  ((const struct unknown_encoding *) (enc))
1248
1249int
1250XmlSizeOfUnknownEncoding(void)
1251{
1252  return sizeof(struct unknown_encoding);
1253}
1254
1255static int PTRFASTCALL
1256unknown_isName(const ENCODING *enc, const char *p)
1257{
1258  const struct unknown_encoding *uenc = AS_UNKNOWN_ENCODING(enc);
1259  int c = uenc->convert(uenc->userData, p);
1260  if (c & ~0xFFFF)
1261    return 0;
1262  return UCS2_GET_NAMING(namePages, c >> 8, c & 0xFF);
1263}
1264
1265static int PTRFASTCALL
1266unknown_isNmstrt(const ENCODING *enc, const char *p)
1267{
1268  const struct unknown_encoding *uenc = AS_UNKNOWN_ENCODING(enc);
1269  int c = uenc->convert(uenc->userData, p);
1270  if (c & ~0xFFFF)
1271    return 0;
1272  return UCS2_GET_NAMING(nmstrtPages, c >> 8, c & 0xFF);
1273}
1274
1275static int PTRFASTCALL
1276unknown_isInvalid(const ENCODING *enc, const char *p)
1277{
1278  const struct unknown_encoding *uenc = AS_UNKNOWN_ENCODING(enc);
1279  int c = uenc->convert(uenc->userData, p);
1280  return (c & ~0xFFFF) || checkCharRefNumber(c) < 0;
1281}
1282
1283static void PTRCALL
1284unknown_toUtf8(const ENCODING *enc,
1285               const char **fromP, const char *fromLim,
1286               char **toP, const char *toLim)
1287{
1288  const struct unknown_encoding *uenc = AS_UNKNOWN_ENCODING(enc);
1289  char buf[XML_UTF8_ENCODE_MAX];
1290  for (;;) {
1291    const char *utf8;
1292    int n;
1293    if (*fromP == fromLim)
1294      break;
1295    utf8 = uenc->utf8[(unsigned char)**fromP];
1296    n = *utf8++;
1297    if (n == 0) {
1298      int c = uenc->convert(uenc->userData, *fromP);
1299      n = XmlUtf8Encode(c, buf);
1300      if (n > toLim - *toP)
1301        break;
1302      utf8 = buf;
1303      *fromP += (AS_NORMAL_ENCODING(enc)->type[(unsigned char)**fromP]
1304                 - (BT_LEAD2 - 2));
1305    }
1306    else {
1307      if (n > toLim - *toP)
1308        break;
1309      (*fromP)++;
1310    }
1311    do {
1312      *(*toP)++ = *utf8++;
1313    } while (--n != 0);
1314  }
1315}
1316
1317static void PTRCALL
1318unknown_toUtf16(const ENCODING *enc,
1319                const char **fromP, const char *fromLim,
1320                unsigned short **toP, const unsigned short *toLim)
1321{
1322  const struct unknown_encoding *uenc = AS_UNKNOWN_ENCODING(enc);
1323  while (*fromP != fromLim && *toP != toLim) {
1324    unsigned short c = uenc->utf16[(unsigned char)**fromP];
1325    if (c == 0) {
1326      c = (unsigned short)
1327          uenc->convert(uenc->userData, *fromP);
1328      *fromP += (AS_NORMAL_ENCODING(enc)->type[(unsigned char)**fromP]
1329                 - (BT_LEAD2 - 2));
1330    }
1331    else
1332      (*fromP)++;
1333    *(*toP)++ = c;
1334  }
1335}
1336
1337ENCODING *
1338XmlInitUnknownEncoding(void *mem,
1339                       int *table,
1340                       CONVERTER convert,
1341                       void *userData)
1342{
1343  int i;
1344  struct unknown_encoding *e = (struct unknown_encoding *)mem;
1345  for (i = 0; i < (int)sizeof(struct normal_encoding); i++)
1346    ((char *)mem)[i] = ((char *)&latin1_encoding)[i];
1347  for (i = 0; i < 128; i++)
1348    if (latin1_encoding.type[i] != BT_OTHER
1349        && latin1_encoding.type[i] != BT_NONXML
1350        && table[i] != i)
1351      return 0;
1352  for (i = 0; i < 256; i++) {
1353    int c = table[i];
1354    if (c == -1) {
1355      e->normal.type[i] = BT_MALFORM;
1356      /* This shouldn't really get used. */
1357      e->utf16[i] = 0xFFFF;
1358      e->utf8[i][0] = 1;
1359      e->utf8[i][1] = 0;
1360    }
1361    else if (c < 0) {
1362      if (c < -4)
1363        return 0;
1364      e->normal.type[i] = (unsigned char)(BT_LEAD2 - (c + 2));
1365      e->utf8[i][0] = 0;
1366      e->utf16[i] = 0;
1367    }
1368    else if (c < 0x80) {
1369      if (latin1_encoding.type[c] != BT_OTHER
1370          && latin1_encoding.type[c] != BT_NONXML
1371          && c != i)
1372        return 0;
1373      e->normal.type[i] = latin1_encoding.type[c];
1374      e->utf8[i][0] = 1;
1375      e->utf8[i][1] = (char)c;
1376      e->utf16[i] = (unsigned short)(c == 0 ? 0xFFFF : c);
1377    }
1378    else if (checkCharRefNumber(c) < 0) {
1379      e->normal.type[i] = BT_NONXML;
1380      /* This shouldn't really get used. */
1381      e->utf16[i] = 0xFFFF;
1382      e->utf8[i][0] = 1;
1383      e->utf8[i][1] = 0;
1384    }
1385    else {
1386      if (c > 0xFFFF)
1387        return 0;
1388      if (UCS2_GET_NAMING(nmstrtPages, c >> 8, c & 0xff))
1389        e->normal.type[i] = BT_NMSTRT;
1390      else if (UCS2_GET_NAMING(namePages, c >> 8, c & 0xff))
1391        e->normal.type[i] = BT_NAME;
1392      else
1393        e->normal.type[i] = BT_OTHER;
1394      e->utf8[i][0] = (char)XmlUtf8Encode(c, e->utf8[i] + 1);
1395      e->utf16[i] = (unsigned short)c;
1396    }
1397  }
1398  e->userData = userData;
1399  e->convert = convert;
1400  if (convert) {
1401    e->normal.isName2 = unknown_isName;
1402    e->normal.isName3 = unknown_isName;
1403    e->normal.isName4 = unknown_isName;
1404    e->normal.isNmstrt2 = unknown_isNmstrt;
1405    e->normal.isNmstrt3 = unknown_isNmstrt;
1406    e->normal.isNmstrt4 = unknown_isNmstrt;
1407    e->normal.isInvalid2 = unknown_isInvalid;
1408    e->normal.isInvalid3 = unknown_isInvalid;
1409    e->normal.isInvalid4 = unknown_isInvalid;
1410  }
1411  e->normal.enc.utf8Convert = unknown_toUtf8;
1412  e->normal.enc.utf16Convert = unknown_toUtf16;
1413  return &(e->normal.enc);
1414}
1415
1416/* If this enumeration is changed, getEncodingIndex and encodings
1417must also be changed. */
1418enum {
1419  UNKNOWN_ENC = -1,
1420  ISO_8859_1_ENC = 0,
1421  US_ASCII_ENC,
1422  UTF_8_ENC,
1423  UTF_16_ENC,
1424  UTF_16BE_ENC,
1425  UTF_16LE_ENC,
1426  /* must match encodingNames up to here */
1427  NO_ENC
1428};
1429
1430static const char KW_ISO_8859_1[] = {
1431  ASCII_I, ASCII_S, ASCII_O, ASCII_MINUS, ASCII_8, ASCII_8, ASCII_5, ASCII_9,
1432  ASCII_MINUS, ASCII_1, '\0'
1433};
1434static const char KW_US_ASCII[] = {
1435  ASCII_U, ASCII_S, ASCII_MINUS, ASCII_A, ASCII_S, ASCII_C, ASCII_I, ASCII_I,
1436  '\0'
1437};
1438static const char KW_UTF_8[] =  {
1439  ASCII_U, ASCII_T, ASCII_F, ASCII_MINUS, ASCII_8, '\0'
1440};
1441static const char KW_UTF_16[] = {
1442  ASCII_U, ASCII_T, ASCII_F, ASCII_MINUS, ASCII_1, ASCII_6, '\0'
1443};
1444static const char KW_UTF_16BE[] = {
1445  ASCII_U, ASCII_T, ASCII_F, ASCII_MINUS, ASCII_1, ASCII_6, ASCII_B, ASCII_E,
1446  '\0'
1447};
1448static const char KW_UTF_16LE[] = {
1449  ASCII_U, ASCII_T, ASCII_F, ASCII_MINUS, ASCII_1, ASCII_6, ASCII_L, ASCII_E,
1450  '\0'
1451};
1452
1453static int FASTCALL
1454getEncodingIndex(const char *name)
1455{
1456  static const char * const encodingNames[] = {
1457    KW_ISO_8859_1,
1458    KW_US_ASCII,
1459    KW_UTF_8,
1460    KW_UTF_16,
1461    KW_UTF_16BE,
1462    KW_UTF_16LE,
1463  };
1464  int i;
1465  if (name == NULL)
1466    return NO_ENC;
1467  for (i = 0; i < (int)(sizeof(encodingNames)/sizeof(encodingNames[0])); i++)
1468    if (streqci(name, encodingNames[i]))
1469      return i;
1470  return UNKNOWN_ENC;
1471}
1472
1473/* For binary compatibility, we store the index of the encoding
1474   specified at initialization in the isUtf16 member.
1475*/
1476
1477#define INIT_ENC_INDEX(enc) ((int)(enc)->initEnc.isUtf16)
1478#define SET_INIT_ENC_INDEX(enc, i) ((enc)->initEnc.isUtf16 = (char)i)
1479
1480/* This is what detects the encoding.  encodingTable maps from
1481   encoding indices to encodings; INIT_ENC_INDEX(enc) is the index of
1482   the external (protocol) specified encoding; state is
1483   XML_CONTENT_STATE if we're parsing an external text entity, and
1484   XML_PROLOG_STATE otherwise.
1485*/
1486
1487
1488static int
1489initScan(const ENCODING * const *encodingTable,
1490         const INIT_ENCODING *enc,
1491         int state,
1492         const char *ptr,
1493         const char *end,
1494         const char **nextTokPtr)
1495{
1496  const ENCODING **encPtr;
1497
1498  if (ptr == end)
1499    return XML_TOK_NONE;
1500  encPtr = enc->encPtr;
1501  if (ptr + 1 == end) {
1502    /* only a single byte available for auto-detection */
1503#ifndef XML_DTD /* FIXME */
1504    /* a well-formed document entity must have more than one byte */
1505    if (state != XML_CONTENT_STATE)
1506      return XML_TOK_PARTIAL;
1507#endif
1508    /* so we're parsing an external text entity... */
1509    /* if UTF-16 was externally specified, then we need at least 2 bytes */
1510    switch (INIT_ENC_INDEX(enc)) {
1511    case UTF_16_ENC:
1512    case UTF_16LE_ENC:
1513    case UTF_16BE_ENC:
1514      return XML_TOK_PARTIAL;
1515    }
1516    switch ((unsigned char)*ptr) {
1517    case 0xFE:
1518    case 0xFF:
1519    case 0xEF: /* possibly first byte of UTF-8 BOM */
1520      if (INIT_ENC_INDEX(enc) == ISO_8859_1_ENC
1521          && state == XML_CONTENT_STATE)
1522        break;
1523      /* fall through */
1524    case 0x00:
1525    case 0x3C:
1526      return XML_TOK_PARTIAL;
1527    }
1528  }
1529  else {
1530    switch (((unsigned char)ptr[0] << 8) | (unsigned char)ptr[1]) {
1531    case 0xFEFF:
1532      if (INIT_ENC_INDEX(enc) == ISO_8859_1_ENC
1533          && state == XML_CONTENT_STATE)
1534        break;
1535      *nextTokPtr = ptr + 2;
1536      *encPtr = encodingTable[UTF_16BE_ENC];
1537      return XML_TOK_BOM;
1538    /* 00 3C is handled in the default case */
1539    case 0x3C00:
1540      if ((INIT_ENC_INDEX(enc) == UTF_16BE_ENC
1541           || INIT_ENC_INDEX(enc) == UTF_16_ENC)
1542          && state == XML_CONTENT_STATE)
1543        break;
1544      *encPtr = encodingTable[UTF_16LE_ENC];
1545      return XmlTok(*encPtr, state, ptr, end, nextTokPtr);
1546    case 0xFFFE:
1547      if (INIT_ENC_INDEX(enc) == ISO_8859_1_ENC
1548          && state == XML_CONTENT_STATE)
1549        break;
1550      *nextTokPtr = ptr + 2;
1551      *encPtr = encodingTable[UTF_16LE_ENC];
1552      return XML_TOK_BOM;
1553    case 0xEFBB:
1554      /* Maybe a UTF-8 BOM (EF BB BF) */
1555      /* If there's an explicitly specified (external) encoding
1556         of ISO-8859-1 or some flavour of UTF-16
1557         and this is an external text entity,
1558         don't look for the BOM,
1559         because it might be a legal data.
1560      */
1561      if (state == XML_CONTENT_STATE) {
1562        int e = INIT_ENC_INDEX(enc);
1563        if (e == ISO_8859_1_ENC || e == UTF_16BE_ENC
1564            || e == UTF_16LE_ENC || e == UTF_16_ENC)
1565          break;
1566      }
1567      if (ptr + 2 == end)
1568        return XML_TOK_PARTIAL;
1569      if ((unsigned char)ptr[2] == 0xBF) {
1570        *nextTokPtr = ptr + 3;
1571        *encPtr = encodingTable[UTF_8_ENC];
1572        return XML_TOK_BOM;
1573      }
1574      break;
1575    default:
1576      if (ptr[0] == '\0') {
1577        /* 0 isn't a legal data character. Furthermore a document
1578           entity can only start with ASCII characters.  So the only
1579           way this can fail to be big-endian UTF-16 if it it's an
1580           external parsed general entity that's labelled as
1581           UTF-16LE.
1582        */
1583        if (state == XML_CONTENT_STATE && INIT_ENC_INDEX(enc) == UTF_16LE_ENC)
1584          break;
1585        *encPtr = encodingTable[UTF_16BE_ENC];
1586        return XmlTok(*encPtr, state, ptr, end, nextTokPtr);
1587      }
1588      else if (ptr[1] == '\0') {
1589        /* We could recover here in the case:
1590            - parsing an external entity
1591            - second byte is 0
1592            - no externally specified encoding
1593            - no encoding declaration
1594           by assuming UTF-16LE.  But we don't, because this would mean when
1595           presented just with a single byte, we couldn't reliably determine
1596           whether we needed further bytes.
1597        */
1598        if (state == XML_CONTENT_STATE)
1599          break;
1600        *encPtr = encodingTable[UTF_16LE_ENC];
1601        return XmlTok(*encPtr, state, ptr, end, nextTokPtr);
1602      }
1603      break;
1604    }
1605  }
1606  *encPtr = encodingTable[INIT_ENC_INDEX(enc)];
1607  return XmlTok(*encPtr, state, ptr, end, nextTokPtr);
1608}
1609
1610
1611#define NS(x) x
1612#define ns(x) x
1613#include "xmltok_ns.c"
1614#undef NS
1615#undef ns
1616
1617#ifdef XML_NS
1618
1619#define NS(x) x ## NS
1620#define ns(x) x ## _ns
1621
1622#include "xmltok_ns.c"
1623
1624#undef NS
1625#undef ns
1626
1627ENCODING *
1628XmlInitUnknownEncodingNS(void *mem,
1629                         int *table,
1630                         CONVERTER convert,
1631                         void *userData)
1632{
1633  ENCODING *enc = XmlInitUnknownEncoding(mem, table, convert, userData);
1634  if (enc)
1635    ((struct normal_encoding *)enc)->type[ASCII_COLON] = BT_COLON;
1636  return enc;
1637}
1638
1639#endif /* XML_NS */
1640