1 /* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
2 See the file COPYING for copying permission.
3 */
4
5 #include <stddef.h>
6
7 #ifdef _WIN32
8 #include "winconfig.h"
9 #else
10 #ifdef HAVE_EXPAT_CONFIG_H
11 #include <expat_config.h>
12 #endif
13 #endif /* ndef _WIN32 */
14
15 #include "expat_external.h"
16 #include "internal.h"
17 #include "xmltok.h"
18 #include "nametab.h"
19
20 #ifdef XML_DTD
21 #define IGNORE_SECTION_TOK_VTABLE , PREFIX(ignoreSectionTok)
22 #else
23 #define IGNORE_SECTION_TOK_VTABLE /* as nothing */
24 #endif
25
26 #define VTABLE1 \
27 { PREFIX(prologTok), PREFIX(contentTok), \
28 PREFIX(cdataSectionTok) IGNORE_SECTION_TOK_VTABLE }, \
29 { PREFIX(attributeValueTok), PREFIX(entityValueTok) }, \
30 PREFIX(sameName), \
31 PREFIX(nameMatchesAscii), \
32 PREFIX(nameLength), \
33 PREFIX(skipS), \
34 PREFIX(getAtts), \
35 PREFIX(charRefNumber), \
36 PREFIX(predefinedEntityName), \
37 PREFIX(updatePosition), \
38 PREFIX(isPublicId)
39
40 #define VTABLE VTABLE1, PREFIX(toUtf8), PREFIX(toUtf16)
41
42 #define UCS2_GET_NAMING(pages, hi, lo) \
43 (namingBitmap[(pages[hi] << 3) + ((lo) >> 5)] & (1u << ((lo) & 0x1F)))
44
45 /* A 2 byte UTF-8 representation splits the characters 11 bits between
46 the bottom 5 and 6 bits of the bytes. We need 8 bits to index into
47 pages, 3 bits to add to that index and 5 bits to generate the mask.
48 */
49 #define UTF8_GET_NAMING2(pages, byte) \
50 (namingBitmap[((pages)[(((byte)[0]) >> 2) & 7] << 3) \
51 + ((((byte)[0]) & 3) << 1) \
52 + ((((byte)[1]) >> 5) & 1)] \
53 & (1u << (((byte)[1]) & 0x1F)))
54
55 /* A 3 byte UTF-8 representation splits the characters 16 bits between
56 the bottom 4, 6 and 6 bits of the bytes. We need 8 bits to index
57 into pages, 3 bits to add to that index and 5 bits to generate the
58 mask.
59 */
60 #define UTF8_GET_NAMING3(pages, byte) \
61 (namingBitmap[((pages)[((((byte)[0]) & 0xF) << 4) \
62 + ((((byte)[1]) >> 2) & 0xF)] \
63 << 3) \
64 + ((((byte)[1]) & 3) << 1) \
65 + ((((byte)[2]) >> 5) & 1)] \
66 & (1u << (((byte)[2]) & 0x1F)))
67
68 #define UTF8_GET_NAMING(pages, p, n) \
69 ((n) == 2 \
70 ? UTF8_GET_NAMING2(pages, (const unsigned char *)(p)) \
71 : ((n) == 3 \
72 ? UTF8_GET_NAMING3(pages, (const unsigned char *)(p)) \
73 : 0))
74
75 /* Detection of invalid UTF-8 sequences is based on Table 3.1B
76 of Unicode 3.2: http://www.unicode.org/unicode/reports/tr28/
77 with the additional restriction of not allowing the Unicode
78 code points 0xFFFF and 0xFFFE (sequences EF,BF,BF and EF,BF,BE).
79 Implementation details:
80 (A & 0x80) == 0 means A < 0x80
81 and
82 (A & 0xC0) == 0xC0 means A > 0xBF
83 */
84
85 #define UTF8_INVALID2(p) \
86 ((*p) < 0xC2 || ((p)[1] & 0x80) == 0 || ((p)[1] & 0xC0) == 0xC0)
87
88 #define UTF8_INVALID3(p) \
89 (((p)[2] & 0x80) == 0 \
90 || \
91 ((*p) == 0xEF && (p)[1] == 0xBF \
92 ? \
93 (p)[2] > 0xBD \
94 : \
95 ((p)[2] & 0xC0) == 0xC0) \
96 || \
97 ((*p) == 0xE0 \
98 ? \
99 (p)[1] < 0xA0 || ((p)[1] & 0xC0) == 0xC0 \
100 : \
101 ((p)[1] & 0x80) == 0 \
102 || \
103 ((*p) == 0xED ? (p)[1] > 0x9F : ((p)[1] & 0xC0) == 0xC0)))
104
105 #define UTF8_INVALID4(p) \
106 (((p)[3] & 0x80) == 0 || ((p)[3] & 0xC0) == 0xC0 \
107 || \
108 ((p)[2] & 0x80) == 0 || ((p)[2] & 0xC0) == 0xC0 \
109 || \
110 ((*p) == 0xF0 \
111 ? \
112 (p)[1] < 0x90 || ((p)[1] & 0xC0) == 0xC0 \
113 : \
114 ((p)[1] & 0x80) == 0 \
115 || \
116 ((*p) == 0xF4 ? (p)[1] > 0x8F : ((p)[1] & 0xC0) == 0xC0)))
117
118 static int PTRFASTCALL
isNever(const ENCODING * UNUSED_P (enc),const char * UNUSED_P (p))119 isNever(const ENCODING *UNUSED_P(enc), const char *UNUSED_P(p))
120 {
121 return 0;
122 }
123
124 static int PTRFASTCALL
utf8_isName2(const ENCODING * UNUSED_P (enc),const char * p)125 utf8_isName2(const ENCODING *UNUSED_P(enc), const char *p)
126 {
127 return UTF8_GET_NAMING2(namePages, (const unsigned char *)p);
128 }
129
130 static int PTRFASTCALL
utf8_isName3(const ENCODING * UNUSED_P (enc),const char * p)131 utf8_isName3(const ENCODING *UNUSED_P(enc), const char *p)
132 {
133 return UTF8_GET_NAMING3(namePages, (const unsigned char *)p);
134 }
135
136 #define utf8_isName4 isNever
137
138 static int PTRFASTCALL
utf8_isNmstrt2(const ENCODING * UNUSED_P (enc),const char * p)139 utf8_isNmstrt2(const ENCODING *UNUSED_P(enc), const char *p)
140 {
141 return UTF8_GET_NAMING2(nmstrtPages, (const unsigned char *)p);
142 }
143
144 static int PTRFASTCALL
utf8_isNmstrt3(const ENCODING * UNUSED_P (enc),const char * p)145 utf8_isNmstrt3(const ENCODING *UNUSED_P(enc), const char *p)
146 {
147 return UTF8_GET_NAMING3(nmstrtPages, (const unsigned char *)p);
148 }
149
150 #define utf8_isNmstrt4 isNever
151
152 static int PTRFASTCALL
utf8_isInvalid2(const ENCODING * UNUSED_P (enc),const char * p)153 utf8_isInvalid2(const ENCODING *UNUSED_P(enc), const char *p)
154 {
155 return UTF8_INVALID2((const unsigned char *)p);
156 }
157
158 static int PTRFASTCALL
utf8_isInvalid3(const ENCODING * UNUSED_P (enc),const char * p)159 utf8_isInvalid3(const ENCODING *UNUSED_P(enc), const char *p)
160 {
161 return UTF8_INVALID3((const unsigned char *)p);
162 }
163
164 static int PTRFASTCALL
utf8_isInvalid4(const ENCODING * UNUSED_P (enc),const char * p)165 utf8_isInvalid4(const ENCODING *UNUSED_P(enc), const char *p)
166 {
167 return UTF8_INVALID4((const unsigned char *)p);
168 }
169
170 struct normal_encoding {
171 ENCODING enc;
172 unsigned char type[256];
173 #ifdef XML_MIN_SIZE
174 int (PTRFASTCALL *byteType)(const ENCODING *, const char *);
175 int (PTRFASTCALL *isNameMin)(const ENCODING *, const char *);
176 int (PTRFASTCALL *isNmstrtMin)(const ENCODING *, const char *);
177 int (PTRFASTCALL *byteToAscii)(const ENCODING *, const char *);
178 int (PTRCALL *charMatches)(const ENCODING *, const char *, int);
179 #endif /* XML_MIN_SIZE */
180 int (PTRFASTCALL *isName2)(const ENCODING *, const char *);
181 int (PTRFASTCALL *isName3)(const ENCODING *, const char *);
182 int (PTRFASTCALL *isName4)(const ENCODING *, const char *);
183 int (PTRFASTCALL *isNmstrt2)(const ENCODING *, const char *);
184 int (PTRFASTCALL *isNmstrt3)(const ENCODING *, const char *);
185 int (PTRFASTCALL *isNmstrt4)(const ENCODING *, const char *);
186 int (PTRFASTCALL *isInvalid2)(const ENCODING *, const char *);
187 int (PTRFASTCALL *isInvalid3)(const ENCODING *, const char *);
188 int (PTRFASTCALL *isInvalid4)(const ENCODING *, const char *);
189 };
190
191 #define AS_NORMAL_ENCODING(enc) ((const struct normal_encoding *) (enc))
192
193 #ifdef XML_MIN_SIZE
194
195 #define STANDARD_VTABLE(E) \
196 E ## byteType, \
197 E ## isNameMin, \
198 E ## isNmstrtMin, \
199 E ## byteToAscii, \
200 E ## charMatches,
201
202 #else
203
204 #define STANDARD_VTABLE(E) /* as nothing */
205
206 #endif
207
208 #define NORMAL_VTABLE(E) \
209 E ## isName2, \
210 E ## isName3, \
211 E ## isName4, \
212 E ## isNmstrt2, \
213 E ## isNmstrt3, \
214 E ## isNmstrt4, \
215 E ## isInvalid2, \
216 E ## isInvalid3, \
217 E ## isInvalid4
218
219 #define NULL_VTABLE \
220 /* isName2 */ NULL, \
221 /* isName3 */ NULL, \
222 /* isName4 */ NULL, \
223 /* isNmstrt2 */ NULL, \
224 /* isNmstrt3 */ NULL, \
225 /* isNmstrt4 */ NULL, \
226 /* isInvalid2 */ NULL, \
227 /* isInvalid3 */ NULL, \
228 /* isInvalid4 */ NULL
229
230 static int FASTCALL checkCharRefNumber(int);
231
232 #include "xmltok_impl.h"
233 #include "ascii.h"
234
235 #ifdef XML_MIN_SIZE
236 #define sb_isNameMin isNever
237 #define sb_isNmstrtMin isNever
238 #endif
239
240 #ifdef XML_MIN_SIZE
241 #define MINBPC(enc) ((enc)->minBytesPerChar)
242 #else
243 /* minimum bytes per character */
244 #define MINBPC(enc) 1
245 #endif
246
247 #define SB_BYTE_TYPE(enc, p) \
248 (((struct normal_encoding *)(enc))->type[(unsigned char)*(p)])
249
250 #ifdef XML_MIN_SIZE
251 static int PTRFASTCALL
sb_byteType(const ENCODING * enc,const char * p)252 sb_byteType(const ENCODING *enc, const char *p)
253 {
254 return SB_BYTE_TYPE(enc, p);
255 }
256 #define BYTE_TYPE(enc, p) \
257 (AS_NORMAL_ENCODING(enc)->byteType(enc, p))
258 #else
259 #define BYTE_TYPE(enc, p) SB_BYTE_TYPE(enc, p)
260 #endif
261
262 #ifdef XML_MIN_SIZE
263 #define BYTE_TO_ASCII(enc, p) \
264 (AS_NORMAL_ENCODING(enc)->byteToAscii(enc, p))
265 static int PTRFASTCALL
sb_byteToAscii(const ENCODING * enc,const char * p)266 sb_byteToAscii(const ENCODING *enc, const char *p)
267 {
268 return *p;
269 }
270 #else
271 #define BYTE_TO_ASCII(enc, p) (*(p))
272 #endif
273
274 #define IS_NAME_CHAR(enc, p, n) \
275 (AS_NORMAL_ENCODING(enc)->isName ## n(enc, p))
276 #define IS_NMSTRT_CHAR(enc, p, n) \
277 (AS_NORMAL_ENCODING(enc)->isNmstrt ## n(enc, p))
278 #define IS_INVALID_CHAR(enc, p, n) \
279 (AS_NORMAL_ENCODING(enc)->isInvalid ## n(enc, p))
280
281 #ifdef XML_MIN_SIZE
282 #define IS_NAME_CHAR_MINBPC(enc, p) \
283 (AS_NORMAL_ENCODING(enc)->isNameMin(enc, p))
284 #define IS_NMSTRT_CHAR_MINBPC(enc, p) \
285 (AS_NORMAL_ENCODING(enc)->isNmstrtMin(enc, p))
286 #else
287 #define IS_NAME_CHAR_MINBPC(enc, p) (0)
288 #define IS_NMSTRT_CHAR_MINBPC(enc, p) (0)
289 #endif
290
291 #ifdef XML_MIN_SIZE
292 #define CHAR_MATCHES(enc, p, c) \
293 (AS_NORMAL_ENCODING(enc)->charMatches(enc, p, c))
294 static int PTRCALL
sb_charMatches(const ENCODING * enc,const char * p,int c)295 sb_charMatches(const ENCODING *enc, const char *p, int c)
296 {
297 return *p == c;
298 }
299 #else
300 /* c is an ASCII character */
301 #define CHAR_MATCHES(enc, p, c) (*(p) == c)
302 #endif
303
304 #define PREFIX(ident) normal_ ## ident
305 #define XML_TOK_IMPL_C
306 #include "xmltok_impl.c"
307 #undef XML_TOK_IMPL_C
308
309 #undef MINBPC
310 #undef BYTE_TYPE
311 #undef BYTE_TO_ASCII
312 #undef CHAR_MATCHES
313 #undef IS_NAME_CHAR
314 #undef IS_NAME_CHAR_MINBPC
315 #undef IS_NMSTRT_CHAR
316 #undef IS_NMSTRT_CHAR_MINBPC
317 #undef IS_INVALID_CHAR
318
319 enum { /* UTF8_cvalN is value of masked first byte of N byte sequence */
320 UTF8_cval1 = 0x00,
321 UTF8_cval2 = 0xc0,
322 UTF8_cval3 = 0xe0,
323 UTF8_cval4 = 0xf0
324 };
325
326 void
align_limit_to_full_utf8_characters(const char * from,const char ** fromLimRef)327 align_limit_to_full_utf8_characters(const char * from, const char ** fromLimRef)
328 {
329 const char * fromLim = *fromLimRef;
330 size_t walked = 0;
331 for (; fromLim > from; fromLim--, walked++) {
332 const unsigned char prev = (unsigned char)fromLim[-1];
333 if ((prev & 0xf8u) == 0xf0u) { /* 4-byte character, lead by 0b11110xxx byte */
334 if (walked + 1 >= 4) {
335 fromLim += 4 - 1;
336 break;
337 } else {
338 walked = 0;
339 }
340 } else if ((prev & 0xf0u) == 0xe0u) { /* 3-byte character, lead by 0b1110xxxx byte */
341 if (walked + 1 >= 3) {
342 fromLim += 3 - 1;
343 break;
344 } else {
345 walked = 0;
346 }
347 } else if ((prev & 0xe0u) == 0xc0u) { /* 2-byte character, lead by 0b110xxxxx byte */
348 if (walked + 1 >= 2) {
349 fromLim += 2 - 1;
350 break;
351 } else {
352 walked = 0;
353 }
354 } else if ((prev & 0x80u) == 0x00u) { /* 1-byte character, matching 0b0xxxxxxx */
355 break;
356 }
357 }
358 *fromLimRef = fromLim;
359 }
360
361 static enum XML_Convert_Result PTRCALL
utf8_toUtf8(const ENCODING * UNUSED_P (enc),const char ** fromP,const char * fromLim,char ** toP,const char * toLim)362 utf8_toUtf8(const ENCODING *UNUSED_P(enc),
363 const char **fromP, const char *fromLim,
364 char **toP, const char *toLim)
365 {
366 char *to;
367 const char *from;
368 const char *fromLimInitial = fromLim;
369
370 /* Avoid copying partial characters. */
371 align_limit_to_full_utf8_characters(*fromP, &fromLim);
372
373 for (to = *toP, from = *fromP; (from < fromLim) && (to < toLim); from++, to++)
374 *to = *from;
375 *fromP = from;
376 *toP = to;
377
378 if (fromLim < fromLimInitial)
379 return XML_CONVERT_INPUT_INCOMPLETE;
380 else if ((to == toLim) && (from < fromLim))
381 return XML_CONVERT_OUTPUT_EXHAUSTED;
382 else
383 return XML_CONVERT_COMPLETED;
384 }
385
386 static enum XML_Convert_Result PTRCALL
utf8_toUtf16(const ENCODING * enc,const char ** fromP,const char * fromLim,unsigned short ** toP,const unsigned short * toLim)387 utf8_toUtf16(const ENCODING *enc,
388 const char **fromP, const char *fromLim,
389 unsigned short **toP, const unsigned short *toLim)
390 {
391 enum XML_Convert_Result res = XML_CONVERT_COMPLETED;
392 unsigned short *to = *toP;
393 const char *from = *fromP;
394 while (from < fromLim && to < toLim) {
395 switch (((struct normal_encoding *)enc)->type[(unsigned char)*from]) {
396 case BT_LEAD2:
397 if (fromLim - from < 2) {
398 res = XML_CONVERT_INPUT_INCOMPLETE;
399 goto after;
400 }
401 *to++ = (unsigned short)(((from[0] & 0x1f) << 6) | (from[1] & 0x3f));
402 from += 2;
403 break;
404 case BT_LEAD3:
405 if (fromLim - from < 3) {
406 res = XML_CONVERT_INPUT_INCOMPLETE;
407 goto after;
408 }
409 *to++ = (unsigned short)(((from[0] & 0xf) << 12)
410 | ((from[1] & 0x3f) << 6) | (from[2] & 0x3f));
411 from += 3;
412 break;
413 case BT_LEAD4:
414 {
415 unsigned long n;
416 if (toLim - to < 2) {
417 res = XML_CONVERT_OUTPUT_EXHAUSTED;
418 goto after;
419 }
420 if (fromLim - from < 4) {
421 res = XML_CONVERT_INPUT_INCOMPLETE;
422 goto after;
423 }
424 n = ((from[0] & 0x7) << 18) | ((from[1] & 0x3f) << 12)
425 | ((from[2] & 0x3f) << 6) | (from[3] & 0x3f);
426 n -= 0x10000;
427 to[0] = (unsigned short)((n >> 10) | 0xD800);
428 to[1] = (unsigned short)((n & 0x3FF) | 0xDC00);
429 to += 2;
430 from += 4;
431 }
432 break;
433 default:
434 *to++ = *from++;
435 break;
436 }
437 }
438 if (from < fromLim)
439 res = XML_CONVERT_OUTPUT_EXHAUSTED;
440 after:
441 *fromP = from;
442 *toP = to;
443 return res;
444 }
445
446 #ifdef XML_NS
447 static const struct normal_encoding utf8_encoding_ns = {
448 { VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
449 {
450 #include "asciitab.h"
451 #include "utf8tab.h"
452 },
453 STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
454 };
455 #endif
456
457 static const struct normal_encoding utf8_encoding = {
458 { VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
459 {
460 #define BT_COLON BT_NMSTRT
461 #include "asciitab.h"
462 #undef BT_COLON
463 #include "utf8tab.h"
464 },
465 STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
466 };
467
468 #ifdef XML_NS
469
470 static const struct normal_encoding internal_utf8_encoding_ns = {
471 { VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
472 {
473 #include "iasciitab.h"
474 #include "utf8tab.h"
475 },
476 STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
477 };
478
479 #endif
480
481 static const struct normal_encoding internal_utf8_encoding = {
482 { VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
483 {
484 #define BT_COLON BT_NMSTRT
485 #include "iasciitab.h"
486 #undef BT_COLON
487 #include "utf8tab.h"
488 },
489 STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
490 };
491
492 static enum XML_Convert_Result PTRCALL
latin1_toUtf8(const ENCODING * UNUSED_P (enc),const char ** fromP,const char * fromLim,char ** toP,const char * toLim)493 latin1_toUtf8(const ENCODING *UNUSED_P(enc),
494 const char **fromP, const char *fromLim,
495 char **toP, const char *toLim)
496 {
497 for (;;) {
498 unsigned char c;
499 if (*fromP == fromLim)
500 return XML_CONVERT_COMPLETED;
501 c = (unsigned char)**fromP;
502 if (c & 0x80) {
503 if (toLim - *toP < 2)
504 return XML_CONVERT_OUTPUT_EXHAUSTED;
505 *(*toP)++ = (char)((c >> 6) | UTF8_cval2);
506 *(*toP)++ = (char)((c & 0x3f) | 0x80);
507 (*fromP)++;
508 }
509 else {
510 if (*toP == toLim)
511 return XML_CONVERT_OUTPUT_EXHAUSTED;
512 *(*toP)++ = *(*fromP)++;
513 }
514 }
515 }
516
517 static enum XML_Convert_Result PTRCALL
latin1_toUtf16(const ENCODING * UNUSED_P (enc),const char ** fromP,const char * fromLim,unsigned short ** toP,const unsigned short * toLim)518 latin1_toUtf16(const ENCODING *UNUSED_P(enc),
519 const char **fromP, const char *fromLim,
520 unsigned short **toP, const unsigned short *toLim)
521 {
522 while (*fromP < fromLim && *toP < toLim)
523 *(*toP)++ = (unsigned char)*(*fromP)++;
524
525 if ((*toP == toLim) && (*fromP < fromLim))
526 return XML_CONVERT_OUTPUT_EXHAUSTED;
527 else
528 return XML_CONVERT_COMPLETED;
529 }
530
531 #ifdef XML_NS
532
533 static const struct normal_encoding latin1_encoding_ns = {
534 { VTABLE1, latin1_toUtf8, latin1_toUtf16, 1, 0, 0 },
535 {
536 #include "asciitab.h"
537 #include "latin1tab.h"
538 },
539 STANDARD_VTABLE(sb_) NULL_VTABLE
540 };
541
542 #endif
543
544 static const struct normal_encoding latin1_encoding = {
545 { VTABLE1, latin1_toUtf8, latin1_toUtf16, 1, 0, 0 },
546 {
547 #define BT_COLON BT_NMSTRT
548 #include "asciitab.h"
549 #undef BT_COLON
550 #include "latin1tab.h"
551 },
552 STANDARD_VTABLE(sb_) NULL_VTABLE
553 };
554
555 static enum XML_Convert_Result PTRCALL
ascii_toUtf8(const ENCODING * UNUSED_P (enc),const char ** fromP,const char * fromLim,char ** toP,const char * toLim)556 ascii_toUtf8(const ENCODING *UNUSED_P(enc),
557 const char **fromP, const char *fromLim,
558 char **toP, const char *toLim)
559 {
560 while (*fromP < fromLim && *toP < toLim)
561 *(*toP)++ = *(*fromP)++;
562
563 if ((*toP == toLim) && (*fromP < fromLim))
564 return XML_CONVERT_OUTPUT_EXHAUSTED;
565 else
566 return XML_CONVERT_COMPLETED;
567 }
568
569 #ifdef XML_NS
570
571 static const struct normal_encoding ascii_encoding_ns = {
572 { VTABLE1, ascii_toUtf8, latin1_toUtf16, 1, 1, 0 },
573 {
574 #include "asciitab.h"
575 /* BT_NONXML == 0 */
576 },
577 STANDARD_VTABLE(sb_) NULL_VTABLE
578 };
579
580 #endif
581
582 static const struct normal_encoding ascii_encoding = {
583 { VTABLE1, ascii_toUtf8, latin1_toUtf16, 1, 1, 0 },
584 {
585 #define BT_COLON BT_NMSTRT
586 #include "asciitab.h"
587 #undef BT_COLON
588 /* BT_NONXML == 0 */
589 },
590 STANDARD_VTABLE(sb_) NULL_VTABLE
591 };
592
593 static int PTRFASTCALL
unicode_byte_type(char hi,char lo)594 unicode_byte_type(char hi, char lo)
595 {
596 switch ((unsigned char)hi) {
597 case 0xD8: case 0xD9: case 0xDA: case 0xDB:
598 return BT_LEAD4;
599 case 0xDC: case 0xDD: case 0xDE: case 0xDF:
600 return BT_TRAIL;
601 case 0xFF:
602 switch ((unsigned char)lo) {
603 case 0xFF:
604 case 0xFE:
605 return BT_NONXML;
606 }
607 break;
608 }
609 return BT_NONASCII;
610 }
611
612 #define DEFINE_UTF16_TO_UTF8(E) \
613 static enum XML_Convert_Result PTRCALL \
614 E ## toUtf8(const ENCODING *UNUSED_P(enc), \
615 const char **fromP, const char *fromLim, \
616 char **toP, const char *toLim) \
617 { \
618 const char *from = *fromP; \
619 fromLim = from + (((fromLim - from) >> 1) << 1); /* shrink to even */ \
620 for (; from < fromLim; from += 2) { \
621 int plane; \
622 unsigned char lo2; \
623 unsigned char lo = GET_LO(from); \
624 unsigned char hi = GET_HI(from); \
625 switch (hi) { \
626 case 0: \
627 if (lo < 0x80) { \
628 if (*toP == toLim) { \
629 *fromP = from; \
630 return XML_CONVERT_OUTPUT_EXHAUSTED; \
631 } \
632 *(*toP)++ = lo; \
633 break; \
634 } \
635 /* fall through */ \
636 case 0x1: case 0x2: case 0x3: \
637 case 0x4: case 0x5: case 0x6: case 0x7: \
638 if (toLim - *toP < 2) { \
639 *fromP = from; \
640 return XML_CONVERT_OUTPUT_EXHAUSTED; \
641 } \
642 *(*toP)++ = ((lo >> 6) | (hi << 2) | UTF8_cval2); \
643 *(*toP)++ = ((lo & 0x3f) | 0x80); \
644 break; \
645 default: \
646 if (toLim - *toP < 3) { \
647 *fromP = from; \
648 return XML_CONVERT_OUTPUT_EXHAUSTED; \
649 } \
650 /* 16 bits divided 4, 6, 6 amongst 3 bytes */ \
651 *(*toP)++ = ((hi >> 4) | UTF8_cval3); \
652 *(*toP)++ = (((hi & 0xf) << 2) | (lo >> 6) | 0x80); \
653 *(*toP)++ = ((lo & 0x3f) | 0x80); \
654 break; \
655 case 0xD8: case 0xD9: case 0xDA: case 0xDB: \
656 if (toLim - *toP < 4) { \
657 *fromP = from; \
658 return XML_CONVERT_OUTPUT_EXHAUSTED; \
659 } \
660 if (fromLim - from < 4) { \
661 *fromP = from; \
662 return XML_CONVERT_INPUT_INCOMPLETE; \
663 } \
664 plane = (((hi & 0x3) << 2) | ((lo >> 6) & 0x3)) + 1; \
665 *(*toP)++ = ((plane >> 2) | UTF8_cval4); \
666 *(*toP)++ = (((lo >> 2) & 0xF) | ((plane & 0x3) << 4) | 0x80); \
667 from += 2; \
668 lo2 = GET_LO(from); \
669 *(*toP)++ = (((lo & 0x3) << 4) \
670 | ((GET_HI(from) & 0x3) << 2) \
671 | (lo2 >> 6) \
672 | 0x80); \
673 *(*toP)++ = ((lo2 & 0x3f) | 0x80); \
674 break; \
675 } \
676 } \
677 *fromP = from; \
678 if (from < fromLim) \
679 return XML_CONVERT_INPUT_INCOMPLETE; \
680 else \
681 return XML_CONVERT_COMPLETED; \
682 }
683
684 #define DEFINE_UTF16_TO_UTF16(E) \
685 static enum XML_Convert_Result PTRCALL \
686 E ## toUtf16(const ENCODING *UNUSED_P(enc), \
687 const char **fromP, const char *fromLim, \
688 unsigned short **toP, const unsigned short *toLim) \
689 { \
690 enum XML_Convert_Result res = XML_CONVERT_COMPLETED; \
691 fromLim = *fromP + (((fromLim - *fromP) >> 1) << 1); /* shrink to even */ \
692 /* Avoid copying first half only of surrogate */ \
693 if (fromLim - *fromP > ((toLim - *toP) << 1) \
694 && (GET_HI(fromLim - 2) & 0xF8) == 0xD8) { \
695 fromLim -= 2; \
696 res = XML_CONVERT_INPUT_INCOMPLETE; \
697 } \
698 for (; *fromP < fromLim && *toP < toLim; *fromP += 2) \
699 *(*toP)++ = (GET_HI(*fromP) << 8) | GET_LO(*fromP); \
700 if ((*toP == toLim) && (*fromP < fromLim)) \
701 return XML_CONVERT_OUTPUT_EXHAUSTED; \
702 else \
703 return res; \
704 }
705
706 #define SET2(ptr, ch) \
707 (((ptr)[0] = ((ch) & 0xff)), ((ptr)[1] = ((ch) >> 8)))
708 #define GET_LO(ptr) ((unsigned char)(ptr)[0])
709 #define GET_HI(ptr) ((unsigned char)(ptr)[1])
710
711 DEFINE_UTF16_TO_UTF8(little2_)
DEFINE_UTF16_TO_UTF16(little2_)712 DEFINE_UTF16_TO_UTF16(little2_)
713
714 #undef SET2
715 #undef GET_LO
716 #undef GET_HI
717
718 #define SET2(ptr, ch) \
719 (((ptr)[0] = ((ch) >> 8)), ((ptr)[1] = ((ch) & 0xFF)))
720 #define GET_LO(ptr) ((unsigned char)(ptr)[1])
721 #define GET_HI(ptr) ((unsigned char)(ptr)[0])
722
723 DEFINE_UTF16_TO_UTF8(big2_)
724 DEFINE_UTF16_TO_UTF16(big2_)
725
726 #undef SET2
727 #undef GET_LO
728 #undef GET_HI
729
730 #define LITTLE2_BYTE_TYPE(enc, p) \
731 ((p)[1] == 0 \
732 ? ((struct normal_encoding *)(enc))->type[(unsigned char)*(p)] \
733 : unicode_byte_type((p)[1], (p)[0]))
734 #define LITTLE2_BYTE_TO_ASCII(enc, p) ((p)[1] == 0 ? (p)[0] : -1)
735 #define LITTLE2_CHAR_MATCHES(enc, p, c) ((p)[1] == 0 && (p)[0] == c)
736 #define LITTLE2_IS_NAME_CHAR_MINBPC(enc, p) \
737 UCS2_GET_NAMING(namePages, (unsigned char)p[1], (unsigned char)p[0])
738 #define LITTLE2_IS_NMSTRT_CHAR_MINBPC(enc, p) \
739 UCS2_GET_NAMING(nmstrtPages, (unsigned char)p[1], (unsigned char)p[0])
740
741 #ifdef XML_MIN_SIZE
742
743 static int PTRFASTCALL
744 little2_byteType(const ENCODING *enc, const char *p)
745 {
746 return LITTLE2_BYTE_TYPE(enc, p);
747 }
748
749 static int PTRFASTCALL
little2_byteToAscii(const ENCODING * enc,const char * p)750 little2_byteToAscii(const ENCODING *enc, const char *p)
751 {
752 return LITTLE2_BYTE_TO_ASCII(enc, p);
753 }
754
755 static int PTRCALL
little2_charMatches(const ENCODING * enc,const char * p,int c)756 little2_charMatches(const ENCODING *enc, const char *p, int c)
757 {
758 return LITTLE2_CHAR_MATCHES(enc, p, c);
759 }
760
761 static int PTRFASTCALL
little2_isNameMin(const ENCODING * enc,const char * p)762 little2_isNameMin(const ENCODING *enc, const char *p)
763 {
764 return LITTLE2_IS_NAME_CHAR_MINBPC(enc, p);
765 }
766
767 static int PTRFASTCALL
little2_isNmstrtMin(const ENCODING * enc,const char * p)768 little2_isNmstrtMin(const ENCODING *enc, const char *p)
769 {
770 return LITTLE2_IS_NMSTRT_CHAR_MINBPC(enc, p);
771 }
772
773 #undef VTABLE
774 #define VTABLE VTABLE1, little2_toUtf8, little2_toUtf16
775
776 #else /* not XML_MIN_SIZE */
777
778 #undef PREFIX
779 #define PREFIX(ident) little2_ ## ident
780 #define MINBPC(enc) 2
781 /* CHAR_MATCHES is guaranteed to have MINBPC bytes available. */
782 #define BYTE_TYPE(enc, p) LITTLE2_BYTE_TYPE(enc, p)
783 #define BYTE_TO_ASCII(enc, p) LITTLE2_BYTE_TO_ASCII(enc, p)
784 #define CHAR_MATCHES(enc, p, c) LITTLE2_CHAR_MATCHES(enc, p, c)
785 #define IS_NAME_CHAR(enc, p, n) 0
786 #define IS_NAME_CHAR_MINBPC(enc, p) LITTLE2_IS_NAME_CHAR_MINBPC(enc, p)
787 #define IS_NMSTRT_CHAR(enc, p, n) (0)
788 #define IS_NMSTRT_CHAR_MINBPC(enc, p) LITTLE2_IS_NMSTRT_CHAR_MINBPC(enc, p)
789
790 #define XML_TOK_IMPL_C
791 #include "xmltok_impl.c"
792 #undef XML_TOK_IMPL_C
793
794 #undef MINBPC
795 #undef BYTE_TYPE
796 #undef BYTE_TO_ASCII
797 #undef CHAR_MATCHES
798 #undef IS_NAME_CHAR
799 #undef IS_NAME_CHAR_MINBPC
800 #undef IS_NMSTRT_CHAR
801 #undef IS_NMSTRT_CHAR_MINBPC
802 #undef IS_INVALID_CHAR
803
804 #endif /* not XML_MIN_SIZE */
805
806 #ifdef XML_NS
807
808 static const struct normal_encoding little2_encoding_ns = {
809 { VTABLE, 2, 0,
810 #if BYTEORDER == 1234
811 1
812 #else
813 0
814 #endif
815 },
816 {
817 #include "asciitab.h"
818 #include "latin1tab.h"
819 },
820 STANDARD_VTABLE(little2_) NULL_VTABLE
821 };
822
823 #endif
824
825 static const struct normal_encoding little2_encoding = {
826 { VTABLE, 2, 0,
827 #if BYTEORDER == 1234
828 1
829 #else
830 0
831 #endif
832 },
833 {
834 #define BT_COLON BT_NMSTRT
835 #include "asciitab.h"
836 #undef BT_COLON
837 #include "latin1tab.h"
838 },
839 STANDARD_VTABLE(little2_) NULL_VTABLE
840 };
841
842 #if BYTEORDER != 4321
843
844 #ifdef XML_NS
845
846 static const struct normal_encoding internal_little2_encoding_ns = {
847 { VTABLE, 2, 0, 1 },
848 {
849 #include "iasciitab.h"
850 #include "latin1tab.h"
851 },
852 STANDARD_VTABLE(little2_) NULL_VTABLE
853 };
854
855 #endif
856
857 static const struct normal_encoding internal_little2_encoding = {
858 { VTABLE, 2, 0, 1 },
859 {
860 #define BT_COLON BT_NMSTRT
861 #include "iasciitab.h"
862 #undef BT_COLON
863 #include "latin1tab.h"
864 },
865 STANDARD_VTABLE(little2_) NULL_VTABLE
866 };
867
868 #endif
869
870
871 #define BIG2_BYTE_TYPE(enc, p) \
872 ((p)[0] == 0 \
873 ? ((struct normal_encoding *)(enc))->type[(unsigned char)(p)[1]] \
874 : unicode_byte_type((p)[0], (p)[1]))
875 #define BIG2_BYTE_TO_ASCII(enc, p) ((p)[0] == 0 ? (p)[1] : -1)
876 #define BIG2_CHAR_MATCHES(enc, p, c) ((p)[0] == 0 && (p)[1] == c)
877 #define BIG2_IS_NAME_CHAR_MINBPC(enc, p) \
878 UCS2_GET_NAMING(namePages, (unsigned char)p[0], (unsigned char)p[1])
879 #define BIG2_IS_NMSTRT_CHAR_MINBPC(enc, p) \
880 UCS2_GET_NAMING(nmstrtPages, (unsigned char)p[0], (unsigned char)p[1])
881
882 #ifdef XML_MIN_SIZE
883
884 static int PTRFASTCALL
big2_byteType(const ENCODING * enc,const char * p)885 big2_byteType(const ENCODING *enc, const char *p)
886 {
887 return BIG2_BYTE_TYPE(enc, p);
888 }
889
890 static int PTRFASTCALL
big2_byteToAscii(const ENCODING * enc,const char * p)891 big2_byteToAscii(const ENCODING *enc, const char *p)
892 {
893 return BIG2_BYTE_TO_ASCII(enc, p);
894 }
895
896 static int PTRCALL
big2_charMatches(const ENCODING * enc,const char * p,int c)897 big2_charMatches(const ENCODING *enc, const char *p, int c)
898 {
899 return BIG2_CHAR_MATCHES(enc, p, c);
900 }
901
902 static int PTRFASTCALL
big2_isNameMin(const ENCODING * enc,const char * p)903 big2_isNameMin(const ENCODING *enc, const char *p)
904 {
905 return BIG2_IS_NAME_CHAR_MINBPC(enc, p);
906 }
907
908 static int PTRFASTCALL
big2_isNmstrtMin(const ENCODING * enc,const char * p)909 big2_isNmstrtMin(const ENCODING *enc, const char *p)
910 {
911 return BIG2_IS_NMSTRT_CHAR_MINBPC(enc, p);
912 }
913
914 #undef VTABLE
915 #define VTABLE VTABLE1, big2_toUtf8, big2_toUtf16
916
917 #else /* not XML_MIN_SIZE */
918
919 #undef PREFIX
920 #define PREFIX(ident) big2_ ## ident
921 #define MINBPC(enc) 2
922 /* CHAR_MATCHES is guaranteed to have MINBPC bytes available. */
923 #define BYTE_TYPE(enc, p) BIG2_BYTE_TYPE(enc, p)
924 #define BYTE_TO_ASCII(enc, p) BIG2_BYTE_TO_ASCII(enc, p)
925 #define CHAR_MATCHES(enc, p, c) BIG2_CHAR_MATCHES(enc, p, c)
926 #define IS_NAME_CHAR(enc, p, n) 0
927 #define IS_NAME_CHAR_MINBPC(enc, p) BIG2_IS_NAME_CHAR_MINBPC(enc, p)
928 #define IS_NMSTRT_CHAR(enc, p, n) (0)
929 #define IS_NMSTRT_CHAR_MINBPC(enc, p) BIG2_IS_NMSTRT_CHAR_MINBPC(enc, p)
930
931 #define XML_TOK_IMPL_C
932 #include "xmltok_impl.c"
933 #undef XML_TOK_IMPL_C
934
935 #undef MINBPC
936 #undef BYTE_TYPE
937 #undef BYTE_TO_ASCII
938 #undef CHAR_MATCHES
939 #undef IS_NAME_CHAR
940 #undef IS_NAME_CHAR_MINBPC
941 #undef IS_NMSTRT_CHAR
942 #undef IS_NMSTRT_CHAR_MINBPC
943 #undef IS_INVALID_CHAR
944
945 #endif /* not XML_MIN_SIZE */
946
947 #ifdef XML_NS
948
949 static const struct normal_encoding big2_encoding_ns = {
950 { VTABLE, 2, 0,
951 #if BYTEORDER == 4321
952 1
953 #else
954 0
955 #endif
956 },
957 {
958 #include "asciitab.h"
959 #include "latin1tab.h"
960 },
961 STANDARD_VTABLE(big2_) NULL_VTABLE
962 };
963
964 #endif
965
966 static const struct normal_encoding big2_encoding = {
967 { VTABLE, 2, 0,
968 #if BYTEORDER == 4321
969 1
970 #else
971 0
972 #endif
973 },
974 {
975 #define BT_COLON BT_NMSTRT
976 #include "asciitab.h"
977 #undef BT_COLON
978 #include "latin1tab.h"
979 },
980 STANDARD_VTABLE(big2_) NULL_VTABLE
981 };
982
983 #if BYTEORDER != 1234
984
985 #ifdef XML_NS
986
987 static const struct normal_encoding internal_big2_encoding_ns = {
988 { VTABLE, 2, 0, 1 },
989 {
990 #include "iasciitab.h"
991 #include "latin1tab.h"
992 },
993 STANDARD_VTABLE(big2_) NULL_VTABLE
994 };
995
996 #endif
997
998 static const struct normal_encoding internal_big2_encoding = {
999 { VTABLE, 2, 0, 1 },
1000 {
1001 #define BT_COLON BT_NMSTRT
1002 #include "iasciitab.h"
1003 #undef BT_COLON
1004 #include "latin1tab.h"
1005 },
1006 STANDARD_VTABLE(big2_) NULL_VTABLE
1007 };
1008
1009 #endif
1010
1011 #undef PREFIX
1012
1013 static int FASTCALL
streqci(const char * s1,const char * s2)1014 streqci(const char *s1, const char *s2)
1015 {
1016 for (;;) {
1017 char c1 = *s1++;
1018 char c2 = *s2++;
1019 if (ASCII_a <= c1 && c1 <= ASCII_z)
1020 c1 += ASCII_A - ASCII_a;
1021 if (ASCII_a <= c2 && c2 <= ASCII_z)
1022 c2 += ASCII_A - ASCII_a;
1023 if (c1 != c2)
1024 return 0;
1025 if (!c1)
1026 break;
1027 }
1028 return 1;
1029 }
1030
1031 static void PTRCALL
initUpdatePosition(const ENCODING * UNUSED_P (enc),const char * ptr,const char * end,POSITION * pos)1032 initUpdatePosition(const ENCODING *UNUSED_P(enc), const char *ptr,
1033 const char *end, POSITION *pos)
1034 {
1035 normal_updatePosition(&utf8_encoding.enc, ptr, end, pos);
1036 }
1037
1038 static int
toAscii(const ENCODING * enc,const char * ptr,const char * end)1039 toAscii(const ENCODING *enc, const char *ptr, const char *end)
1040 {
1041 char buf[1];
1042 char *p = buf;
1043 XmlUtf8Convert(enc, &ptr, end, &p, p + 1);
1044 if (p == buf)
1045 return -1;
1046 else
1047 return buf[0];
1048 }
1049
1050 static int FASTCALL
isSpace(int c)1051 isSpace(int c)
1052 {
1053 switch (c) {
1054 case 0x20:
1055 case 0xD:
1056 case 0xA:
1057 case 0x9:
1058 return 1;
1059 }
1060 return 0;
1061 }
1062
1063 /* Return 1 if there's just optional white space or there's an S
1064 followed by name=val.
1065 */
1066 static int
parsePseudoAttribute(const ENCODING * enc,const char * ptr,const char * end,const char ** namePtr,const char ** nameEndPtr,const char ** valPtr,const char ** nextTokPtr)1067 parsePseudoAttribute(const ENCODING *enc,
1068 const char *ptr,
1069 const char *end,
1070 const char **namePtr,
1071 const char **nameEndPtr,
1072 const char **valPtr,
1073 const char **nextTokPtr)
1074 {
1075 int c;
1076 char open;
1077 if (ptr == end) {
1078 *namePtr = NULL;
1079 return 1;
1080 }
1081 if (!isSpace(toAscii(enc, ptr, end))) {
1082 *nextTokPtr = ptr;
1083 return 0;
1084 }
1085 do {
1086 ptr += enc->minBytesPerChar;
1087 } while (isSpace(toAscii(enc, ptr, end)));
1088 if (ptr == end) {
1089 *namePtr = NULL;
1090 return 1;
1091 }
1092 *namePtr = ptr;
1093 for (;;) {
1094 c = toAscii(enc, ptr, end);
1095 if (c == -1) {
1096 *nextTokPtr = ptr;
1097 return 0;
1098 }
1099 if (c == ASCII_EQUALS) {
1100 *nameEndPtr = ptr;
1101 break;
1102 }
1103 if (isSpace(c)) {
1104 *nameEndPtr = ptr;
1105 do {
1106 ptr += enc->minBytesPerChar;
1107 } while (isSpace(c = toAscii(enc, ptr, end)));
1108 if (c != ASCII_EQUALS) {
1109 *nextTokPtr = ptr;
1110 return 0;
1111 }
1112 break;
1113 }
1114 ptr += enc->minBytesPerChar;
1115 }
1116 if (ptr == *namePtr) {
1117 *nextTokPtr = ptr;
1118 return 0;
1119 }
1120 ptr += enc->minBytesPerChar;
1121 c = toAscii(enc, ptr, end);
1122 while (isSpace(c)) {
1123 ptr += enc->minBytesPerChar;
1124 c = toAscii(enc, ptr, end);
1125 }
1126 if (c != ASCII_QUOT && c != ASCII_APOS) {
1127 *nextTokPtr = ptr;
1128 return 0;
1129 }
1130 open = (char)c;
1131 ptr += enc->minBytesPerChar;
1132 *valPtr = ptr;
1133 for (;; ptr += enc->minBytesPerChar) {
1134 c = toAscii(enc, ptr, end);
1135 if (c == open)
1136 break;
1137 if (!(ASCII_a <= c && c <= ASCII_z)
1138 && !(ASCII_A <= c && c <= ASCII_Z)
1139 && !(ASCII_0 <= c && c <= ASCII_9)
1140 && c != ASCII_PERIOD
1141 && c != ASCII_MINUS
1142 && c != ASCII_UNDERSCORE) {
1143 *nextTokPtr = ptr;
1144 return 0;
1145 }
1146 }
1147 *nextTokPtr = ptr + enc->minBytesPerChar;
1148 return 1;
1149 }
1150
1151 static const char KW_version[] = {
1152 ASCII_v, ASCII_e, ASCII_r, ASCII_s, ASCII_i, ASCII_o, ASCII_n, '\0'
1153 };
1154
1155 static const char KW_encoding[] = {
1156 ASCII_e, ASCII_n, ASCII_c, ASCII_o, ASCII_d, ASCII_i, ASCII_n, ASCII_g, '\0'
1157 };
1158
1159 static const char KW_standalone[] = {
1160 ASCII_s, ASCII_t, ASCII_a, ASCII_n, ASCII_d, ASCII_a, ASCII_l, ASCII_o,
1161 ASCII_n, ASCII_e, '\0'
1162 };
1163
1164 static const char KW_yes[] = {
1165 ASCII_y, ASCII_e, ASCII_s, '\0'
1166 };
1167
1168 static const char KW_no[] = {
1169 ASCII_n, ASCII_o, '\0'
1170 };
1171
1172 /* BEGIN MOZILLA CHANGE (http://bugzilla.mozilla.org/show_bug.cgi?id=62157) */
1173 static const char KW_XML_1_0[] = {
1174 ASCII_1, ASCII_PERIOD, ASCII_0, '\0'
1175 };
1176 /* END MOZILLA CHANGE */
1177
1178 static int
doParseXmlDecl(const ENCODING * (* encodingFinder)(const ENCODING *,const char *,const char *),int isGeneralTextEntity,const ENCODING * enc,const char * ptr,const char * end,const char ** badPtr,const char ** versionPtr,const char ** versionEndPtr,const char ** encodingName,const ENCODING ** encoding,int * standalone)1179 doParseXmlDecl(const ENCODING *(*encodingFinder)(const ENCODING *,
1180 const char *,
1181 const char *),
1182 int isGeneralTextEntity,
1183 const ENCODING *enc,
1184 const char *ptr,
1185 const char *end,
1186 const char **badPtr,
1187 const char **versionPtr,
1188 const char **versionEndPtr,
1189 const char **encodingName,
1190 const ENCODING **encoding,
1191 int *standalone)
1192 {
1193 const char *val = NULL;
1194 const char *name = NULL;
1195 const char *nameEnd = NULL;
1196 ptr += 5 * enc->minBytesPerChar;
1197 end -= 2 * enc->minBytesPerChar;
1198 if (!parsePseudoAttribute(enc, ptr, end, &name, &nameEnd, &val, &ptr)
1199 || !name) {
1200 *badPtr = ptr;
1201 return 0;
1202 }
1203 if (!XmlNameMatchesAscii(enc, name, nameEnd, KW_version)) {
1204 if (!isGeneralTextEntity) {
1205 *badPtr = name;
1206 return 0;
1207 }
1208 }
1209 else {
1210 if (versionPtr)
1211 *versionPtr = val;
1212 if (versionEndPtr)
1213 *versionEndPtr = ptr;
1214 /* BEGIN MOZILLA CHANGE (http://bugzilla.mozilla.org/show_bug.cgi?id=62157) */
1215 /* Anything else but a version="1.0" is invalid for us, until we support later versions. */
1216 if (!XmlNameMatchesAscii(enc, val, ptr - enc->minBytesPerChar, KW_XML_1_0)) {
1217 *badPtr = val;
1218 return 0;
1219 }
1220 /* END MOZILLA CHANGE */
1221 if (!parsePseudoAttribute(enc, ptr, end, &name, &nameEnd, &val, &ptr)) {
1222 *badPtr = ptr;
1223 return 0;
1224 }
1225 if (!name) {
1226 if (isGeneralTextEntity) {
1227 /* a TextDecl must have an EncodingDecl */
1228 *badPtr = ptr;
1229 return 0;
1230 }
1231 return 1;
1232 }
1233 }
1234 if (XmlNameMatchesAscii(enc, name, nameEnd, KW_encoding)) {
1235 int c = toAscii(enc, val, end);
1236 if (!(ASCII_a <= c && c <= ASCII_z) && !(ASCII_A <= c && c <= ASCII_Z)) {
1237 *badPtr = val;
1238 return 0;
1239 }
1240 if (encodingName)
1241 *encodingName = val;
1242 if (encoding)
1243 *encoding = encodingFinder(enc, val, ptr - enc->minBytesPerChar);
1244 if (!parsePseudoAttribute(enc, ptr, end, &name, &nameEnd, &val, &ptr)) {
1245 *badPtr = ptr;
1246 return 0;
1247 }
1248 if (!name)
1249 return 1;
1250 }
1251 if (!XmlNameMatchesAscii(enc, name, nameEnd, KW_standalone)
1252 || isGeneralTextEntity) {
1253 *badPtr = name;
1254 return 0;
1255 }
1256 if (XmlNameMatchesAscii(enc, val, ptr - enc->minBytesPerChar, KW_yes)) {
1257 if (standalone)
1258 *standalone = 1;
1259 }
1260 else if (XmlNameMatchesAscii(enc, val, ptr - enc->minBytesPerChar, KW_no)) {
1261 if (standalone)
1262 *standalone = 0;
1263 }
1264 else {
1265 *badPtr = val;
1266 return 0;
1267 }
1268 while (isSpace(toAscii(enc, ptr, end)))
1269 ptr += enc->minBytesPerChar;
1270 if (ptr != end) {
1271 *badPtr = ptr;
1272 return 0;
1273 }
1274 return 1;
1275 }
1276
1277 static int FASTCALL
checkCharRefNumber(int result)1278 checkCharRefNumber(int result)
1279 {
1280 switch (result >> 8) {
1281 case 0xD8: case 0xD9: case 0xDA: case 0xDB:
1282 case 0xDC: case 0xDD: case 0xDE: case 0xDF:
1283 return -1;
1284 case 0:
1285 if (latin1_encoding.type[result] == BT_NONXML)
1286 return -1;
1287 break;
1288 case 0xFF:
1289 if (result == 0xFFFE || result == 0xFFFF)
1290 return -1;
1291 break;
1292 }
1293 return result;
1294 }
1295
1296 int FASTCALL
XmlUtf8Encode(int c,char * buf)1297 XmlUtf8Encode(int c, char *buf)
1298 {
1299 enum {
1300 /* minN is minimum legal resulting value for N byte sequence */
1301 min2 = 0x80,
1302 min3 = 0x800,
1303 min4 = 0x10000
1304 };
1305
1306 if (c < 0)
1307 return 0;
1308 if (c < min2) {
1309 buf[0] = (char)(c | UTF8_cval1);
1310 return 1;
1311 }
1312 if (c < min3) {
1313 buf[0] = (char)((c >> 6) | UTF8_cval2);
1314 buf[1] = (char)((c & 0x3f) | 0x80);
1315 return 2;
1316 }
1317 if (c < min4) {
1318 buf[0] = (char)((c >> 12) | UTF8_cval3);
1319 buf[1] = (char)(((c >> 6) & 0x3f) | 0x80);
1320 buf[2] = (char)((c & 0x3f) | 0x80);
1321 return 3;
1322 }
1323 if (c < 0x110000) {
1324 buf[0] = (char)((c >> 18) | UTF8_cval4);
1325 buf[1] = (char)(((c >> 12) & 0x3f) | 0x80);
1326 buf[2] = (char)(((c >> 6) & 0x3f) | 0x80);
1327 buf[3] = (char)((c & 0x3f) | 0x80);
1328 return 4;
1329 }
1330 return 0;
1331 }
1332
1333 int FASTCALL
XmlUtf16Encode(int charNum,unsigned short * buf)1334 XmlUtf16Encode(int charNum, unsigned short *buf)
1335 {
1336 if (charNum < 0)
1337 return 0;
1338 if (charNum < 0x10000) {
1339 buf[0] = (unsigned short)charNum;
1340 return 1;
1341 }
1342 if (charNum < 0x110000) {
1343 charNum -= 0x10000;
1344 buf[0] = (unsigned short)((charNum >> 10) + 0xD800);
1345 buf[1] = (unsigned short)((charNum & 0x3FF) + 0xDC00);
1346 return 2;
1347 }
1348 return 0;
1349 }
1350
1351 struct unknown_encoding {
1352 struct normal_encoding normal;
1353 CONVERTER convert;
1354 void *userData;
1355 unsigned short utf16[256];
1356 char utf8[256][4];
1357 };
1358
1359 #define AS_UNKNOWN_ENCODING(enc) ((const struct unknown_encoding *) (enc))
1360
1361 int
XmlSizeOfUnknownEncoding(void)1362 XmlSizeOfUnknownEncoding(void)
1363 {
1364 return sizeof(struct unknown_encoding);
1365 }
1366
1367 static int PTRFASTCALL
unknown_isName(const ENCODING * enc,const char * p)1368 unknown_isName(const ENCODING *enc, const char *p)
1369 {
1370 const struct unknown_encoding *uenc = AS_UNKNOWN_ENCODING(enc);
1371 int c = uenc->convert(uenc->userData, p);
1372 if (c & ~0xFFFF)
1373 return 0;
1374 return UCS2_GET_NAMING(namePages, c >> 8, c & 0xFF);
1375 }
1376
1377 static int PTRFASTCALL
unknown_isNmstrt(const ENCODING * enc,const char * p)1378 unknown_isNmstrt(const ENCODING *enc, const char *p)
1379 {
1380 const struct unknown_encoding *uenc = AS_UNKNOWN_ENCODING(enc);
1381 int c = uenc->convert(uenc->userData, p);
1382 if (c & ~0xFFFF)
1383 return 0;
1384 return UCS2_GET_NAMING(nmstrtPages, c >> 8, c & 0xFF);
1385 }
1386
1387 static int PTRFASTCALL
unknown_isInvalid(const ENCODING * enc,const char * p)1388 unknown_isInvalid(const ENCODING *enc, const char *p)
1389 {
1390 const struct unknown_encoding *uenc = AS_UNKNOWN_ENCODING(enc);
1391 int c = uenc->convert(uenc->userData, p);
1392 return (c & ~0xFFFF) || checkCharRefNumber(c) < 0;
1393 }
1394
1395 static enum XML_Convert_Result PTRCALL
unknown_toUtf8(const ENCODING * enc,const char ** fromP,const char * fromLim,char ** toP,const char * toLim)1396 unknown_toUtf8(const ENCODING *enc,
1397 const char **fromP, const char *fromLim,
1398 char **toP, const char *toLim)
1399 {
1400 const struct unknown_encoding *uenc = AS_UNKNOWN_ENCODING(enc);
1401 char buf[XML_UTF8_ENCODE_MAX];
1402 for (;;) {
1403 const char *utf8;
1404 int n;
1405 if (*fromP == fromLim)
1406 return XML_CONVERT_COMPLETED;
1407 utf8 = uenc->utf8[(unsigned char)**fromP];
1408 n = *utf8++;
1409 if (n == 0) {
1410 int c = uenc->convert(uenc->userData, *fromP);
1411 n = XmlUtf8Encode(c, buf);
1412 if (n > toLim - *toP)
1413 return XML_CONVERT_OUTPUT_EXHAUSTED;
1414 utf8 = buf;
1415 *fromP += (AS_NORMAL_ENCODING(enc)->type[(unsigned char)**fromP]
1416 - (BT_LEAD2 - 2));
1417 }
1418 else {
1419 if (n > toLim - *toP)
1420 return XML_CONVERT_OUTPUT_EXHAUSTED;
1421 (*fromP)++;
1422 }
1423 do {
1424 *(*toP)++ = *utf8++;
1425 } while (--n != 0);
1426 }
1427 }
1428
1429 static enum XML_Convert_Result PTRCALL
unknown_toUtf16(const ENCODING * enc,const char ** fromP,const char * fromLim,unsigned short ** toP,const unsigned short * toLim)1430 unknown_toUtf16(const ENCODING *enc,
1431 const char **fromP, const char *fromLim,
1432 unsigned short **toP, const unsigned short *toLim)
1433 {
1434 const struct unknown_encoding *uenc = AS_UNKNOWN_ENCODING(enc);
1435 while (*fromP < fromLim && *toP < toLim) {
1436 unsigned short c = uenc->utf16[(unsigned char)**fromP];
1437 if (c == 0) {
1438 c = (unsigned short)
1439 uenc->convert(uenc->userData, *fromP);
1440 *fromP += (AS_NORMAL_ENCODING(enc)->type[(unsigned char)**fromP]
1441 - (BT_LEAD2 - 2));
1442 }
1443 else
1444 (*fromP)++;
1445 *(*toP)++ = c;
1446 }
1447
1448 if ((*toP == toLim) && (*fromP < fromLim))
1449 return XML_CONVERT_OUTPUT_EXHAUSTED;
1450 else
1451 return XML_CONVERT_COMPLETED;
1452 }
1453
1454 ENCODING *
XmlInitUnknownEncoding(void * mem,int * table,CONVERTER convert,void * userData)1455 XmlInitUnknownEncoding(void *mem,
1456 int *table,
1457 CONVERTER convert,
1458 void *userData)
1459 {
1460 int i;
1461 struct unknown_encoding *e = (struct unknown_encoding *)mem;
1462 for (i = 0; i < (int)sizeof(struct normal_encoding); i++)
1463 ((char *)mem)[i] = ((char *)&latin1_encoding)[i];
1464 for (i = 0; i < 128; i++)
1465 if (latin1_encoding.type[i] != BT_OTHER
1466 && latin1_encoding.type[i] != BT_NONXML
1467 && table[i] != i)
1468 return 0;
1469 for (i = 0; i < 256; i++) {
1470 int c = table[i];
1471 if (c == -1) {
1472 e->normal.type[i] = BT_MALFORM;
1473 /* This shouldn't really get used. */
1474 e->utf16[i] = 0xFFFF;
1475 e->utf8[i][0] = 1;
1476 e->utf8[i][1] = 0;
1477 }
1478 else if (c < 0) {
1479 if (c < -4)
1480 return 0;
1481 e->normal.type[i] = (unsigned char)(BT_LEAD2 - (c + 2));
1482 e->utf8[i][0] = 0;
1483 e->utf16[i] = 0;
1484 }
1485 else if (c < 0x80) {
1486 if (latin1_encoding.type[c] != BT_OTHER
1487 && latin1_encoding.type[c] != BT_NONXML
1488 && c != i)
1489 return 0;
1490 e->normal.type[i] = latin1_encoding.type[c];
1491 e->utf8[i][0] = 1;
1492 e->utf8[i][1] = (char)c;
1493 e->utf16[i] = (unsigned short)(c == 0 ? 0xFFFF : c);
1494 }
1495 else if (checkCharRefNumber(c) < 0) {
1496 e->normal.type[i] = BT_NONXML;
1497 /* This shouldn't really get used. */
1498 e->utf16[i] = 0xFFFF;
1499 e->utf8[i][0] = 1;
1500 e->utf8[i][1] = 0;
1501 }
1502 else {
1503 if (c > 0xFFFF)
1504 return 0;
1505 if (UCS2_GET_NAMING(nmstrtPages, c >> 8, c & 0xff))
1506 e->normal.type[i] = BT_NMSTRT;
1507 else if (UCS2_GET_NAMING(namePages, c >> 8, c & 0xff))
1508 e->normal.type[i] = BT_NAME;
1509 else
1510 e->normal.type[i] = BT_OTHER;
1511 e->utf8[i][0] = (char)XmlUtf8Encode(c, e->utf8[i] + 1);
1512 e->utf16[i] = (unsigned short)c;
1513 }
1514 }
1515 e->userData = userData;
1516 e->convert = convert;
1517 if (convert) {
1518 e->normal.isName2 = unknown_isName;
1519 e->normal.isName3 = unknown_isName;
1520 e->normal.isName4 = unknown_isName;
1521 e->normal.isNmstrt2 = unknown_isNmstrt;
1522 e->normal.isNmstrt3 = unknown_isNmstrt;
1523 e->normal.isNmstrt4 = unknown_isNmstrt;
1524 e->normal.isInvalid2 = unknown_isInvalid;
1525 e->normal.isInvalid3 = unknown_isInvalid;
1526 e->normal.isInvalid4 = unknown_isInvalid;
1527 }
1528 e->normal.enc.utf8Convert = unknown_toUtf8;
1529 e->normal.enc.utf16Convert = unknown_toUtf16;
1530 return &(e->normal.enc);
1531 }
1532
1533 /* If this enumeration is changed, getEncodingIndex and encodings
1534 must also be changed. */
1535 enum {
1536 UNKNOWN_ENC = -1,
1537 ISO_8859_1_ENC = 0,
1538 US_ASCII_ENC,
1539 UTF_8_ENC,
1540 UTF_16_ENC,
1541 UTF_16BE_ENC,
1542 UTF_16LE_ENC,
1543 /* must match encodingNames up to here */
1544 NO_ENC
1545 };
1546
1547 static const char KW_ISO_8859_1[] = {
1548 ASCII_I, ASCII_S, ASCII_O, ASCII_MINUS, ASCII_8, ASCII_8, ASCII_5, ASCII_9,
1549 ASCII_MINUS, ASCII_1, '\0'
1550 };
1551 static const char KW_US_ASCII[] = {
1552 ASCII_U, ASCII_S, ASCII_MINUS, ASCII_A, ASCII_S, ASCII_C, ASCII_I, ASCII_I,
1553 '\0'
1554 };
1555 static const char KW_UTF_8[] = {
1556 ASCII_U, ASCII_T, ASCII_F, ASCII_MINUS, ASCII_8, '\0'
1557 };
1558 static const char KW_UTF_16[] = {
1559 ASCII_U, ASCII_T, ASCII_F, ASCII_MINUS, ASCII_1, ASCII_6, '\0'
1560 };
1561 static const char KW_UTF_16BE[] = {
1562 ASCII_U, ASCII_T, ASCII_F, ASCII_MINUS, ASCII_1, ASCII_6, ASCII_B, ASCII_E,
1563 '\0'
1564 };
1565 static const char KW_UTF_16LE[] = {
1566 ASCII_U, ASCII_T, ASCII_F, ASCII_MINUS, ASCII_1, ASCII_6, ASCII_L, ASCII_E,
1567 '\0'
1568 };
1569
1570 static int FASTCALL
getEncodingIndex(const char * name)1571 getEncodingIndex(const char *name)
1572 {
1573 static const char * const encodingNames[] = {
1574 KW_ISO_8859_1,
1575 KW_US_ASCII,
1576 KW_UTF_8,
1577 KW_UTF_16,
1578 KW_UTF_16BE,
1579 KW_UTF_16LE,
1580 };
1581 int i;
1582 if (name == NULL)
1583 return NO_ENC;
1584 for (i = 0; i < (int)(sizeof(encodingNames)/sizeof(encodingNames[0])); i++)
1585 if (streqci(name, encodingNames[i]))
1586 return i;
1587 return UNKNOWN_ENC;
1588 }
1589
1590 /* For binary compatibility, we store the index of the encoding
1591 specified at initialization in the isUtf16 member.
1592 */
1593
1594 #define INIT_ENC_INDEX(enc) ((int)(enc)->initEnc.isUtf16)
1595 #define SET_INIT_ENC_INDEX(enc, i) ((enc)->initEnc.isUtf16 = (char)i)
1596
1597 /* This is what detects the encoding. encodingTable maps from
1598 encoding indices to encodings; INIT_ENC_INDEX(enc) is the index of
1599 the external (protocol) specified encoding; state is
1600 XML_CONTENT_STATE if we're parsing an external text entity, and
1601 XML_PROLOG_STATE otherwise.
1602 */
1603
1604
1605 static int
initScan(const ENCODING * const * encodingTable,const INIT_ENCODING * enc,int state,const char * ptr,const char * end,const char ** nextTokPtr)1606 initScan(const ENCODING * const *encodingTable,
1607 const INIT_ENCODING *enc,
1608 int state,
1609 const char *ptr,
1610 const char *end,
1611 const char **nextTokPtr)
1612 {
1613 const ENCODING **encPtr;
1614
1615 if (ptr >= end)
1616 return XML_TOK_NONE;
1617 encPtr = enc->encPtr;
1618 if (ptr + 1 == end) {
1619 /* only a single byte available for auto-detection */
1620 #ifndef XML_DTD /* FIXME */
1621 /* a well-formed document entity must have more than one byte */
1622 if (state != XML_CONTENT_STATE)
1623 return XML_TOK_PARTIAL;
1624 #endif
1625 /* so we're parsing an external text entity... */
1626 /* if UTF-16 was externally specified, then we need at least 2 bytes */
1627 switch (INIT_ENC_INDEX(enc)) {
1628 case UTF_16_ENC:
1629 case UTF_16LE_ENC:
1630 case UTF_16BE_ENC:
1631 return XML_TOK_PARTIAL;
1632 }
1633 switch ((unsigned char)*ptr) {
1634 case 0xFE:
1635 case 0xFF:
1636 case 0xEF: /* possibly first byte of UTF-8 BOM */
1637 if (INIT_ENC_INDEX(enc) == ISO_8859_1_ENC
1638 && state == XML_CONTENT_STATE)
1639 break;
1640 /* fall through */
1641 case 0x00:
1642 case 0x3C:
1643 return XML_TOK_PARTIAL;
1644 }
1645 }
1646 else {
1647 switch (((unsigned char)ptr[0] << 8) | (unsigned char)ptr[1]) {
1648 case 0xFEFF:
1649 if (INIT_ENC_INDEX(enc) == ISO_8859_1_ENC
1650 && state == XML_CONTENT_STATE)
1651 break;
1652 *nextTokPtr = ptr + 2;
1653 *encPtr = encodingTable[UTF_16BE_ENC];
1654 return XML_TOK_BOM;
1655 /* 00 3C is handled in the default case */
1656 case 0x3C00:
1657 if ((INIT_ENC_INDEX(enc) == UTF_16BE_ENC
1658 || INIT_ENC_INDEX(enc) == UTF_16_ENC)
1659 && state == XML_CONTENT_STATE)
1660 break;
1661 *encPtr = encodingTable[UTF_16LE_ENC];
1662 return XmlTok(*encPtr, state, ptr, end, nextTokPtr);
1663 case 0xFFFE:
1664 if (INIT_ENC_INDEX(enc) == ISO_8859_1_ENC
1665 && state == XML_CONTENT_STATE)
1666 break;
1667 *nextTokPtr = ptr + 2;
1668 *encPtr = encodingTable[UTF_16LE_ENC];
1669 return XML_TOK_BOM;
1670 case 0xEFBB:
1671 /* Maybe a UTF-8 BOM (EF BB BF) */
1672 /* If there's an explicitly specified (external) encoding
1673 of ISO-8859-1 or some flavour of UTF-16
1674 and this is an external text entity,
1675 don't look for the BOM,
1676 because it might be a legal data.
1677 */
1678 if (state == XML_CONTENT_STATE) {
1679 int e = INIT_ENC_INDEX(enc);
1680 if (e == ISO_8859_1_ENC || e == UTF_16BE_ENC
1681 || e == UTF_16LE_ENC || e == UTF_16_ENC)
1682 break;
1683 }
1684 if (ptr + 2 == end)
1685 return XML_TOK_PARTIAL;
1686 if ((unsigned char)ptr[2] == 0xBF) {
1687 *nextTokPtr = ptr + 3;
1688 *encPtr = encodingTable[UTF_8_ENC];
1689 return XML_TOK_BOM;
1690 }
1691 break;
1692 default:
1693 if (ptr[0] == '\0') {
1694 /* 0 isn't a legal data character. Furthermore a document
1695 entity can only start with ASCII characters. So the only
1696 way this can fail to be big-endian UTF-16 if it it's an
1697 external parsed general entity that's labelled as
1698 UTF-16LE.
1699 */
1700 if (state == XML_CONTENT_STATE && INIT_ENC_INDEX(enc) == UTF_16LE_ENC)
1701 break;
1702 *encPtr = encodingTable[UTF_16BE_ENC];
1703 return XmlTok(*encPtr, state, ptr, end, nextTokPtr);
1704 }
1705 else if (ptr[1] == '\0') {
1706 /* We could recover here in the case:
1707 - parsing an external entity
1708 - second byte is 0
1709 - no externally specified encoding
1710 - no encoding declaration
1711 by assuming UTF-16LE. But we don't, because this would mean when
1712 presented just with a single byte, we couldn't reliably determine
1713 whether we needed further bytes.
1714 */
1715 if (state == XML_CONTENT_STATE)
1716 break;
1717 *encPtr = encodingTable[UTF_16LE_ENC];
1718 return XmlTok(*encPtr, state, ptr, end, nextTokPtr);
1719 }
1720 break;
1721 }
1722 }
1723 *encPtr = encodingTable[INIT_ENC_INDEX(enc)];
1724 return XmlTok(*encPtr, state, ptr, end, nextTokPtr);
1725 }
1726
1727
1728 #define NS(x) x
1729 #define ns(x) x
1730 #define XML_TOK_NS_C
1731 #include "xmltok_ns.c"
1732 #undef XML_TOK_NS_C
1733 #undef NS
1734 #undef ns
1735
1736 #ifdef XML_NS
1737
1738 #define NS(x) x ## NS
1739 #define ns(x) x ## _ns
1740
1741 #define XML_TOK_NS_C
1742 #include "xmltok_ns.c"
1743 #undef XML_TOK_NS_C
1744
1745 #undef NS
1746 #undef ns
1747
1748 ENCODING *
XmlInitUnknownEncodingNS(void * mem,int * table,CONVERTER convert,void * userData)1749 XmlInitUnknownEncodingNS(void *mem,
1750 int *table,
1751 CONVERTER convert,
1752 void *userData)
1753 {
1754 ENCODING *enc = XmlInitUnknownEncoding(mem, table, convert, userData);
1755 if (enc)
1756 ((struct normal_encoding *)enc)->type[ASCII_COLON] = BT_COLON;
1757 return enc;
1758 }
1759
1760 #endif /* XML_NS */
1761
1762 /* BEGIN MOZILLA CHANGE (Mozilla extensions for QName checking) */
1763 #ifdef MOZILLA_CLIENT
1764 #include "moz_extensions.c"
1765 #endif /* MOZILLA_CLIENT */
1766 /* END MOZILLA CHANGE */
1767