Annotation of embedaddon/expat/lib/xmltok.c, revision 1.1.1.1
1.1 misho 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 COMPILED_FROM_DSP
8: #include "winconfig.h"
9: #elif defined(MACOS_CLASSIC)
10: #include "macconfig.h"
11: #elif defined(__amigaos4__)
12: #include "amigaconfig.h"
13: #elif defined(__WATCOMC__)
14: #include "watcomconfig.h"
15: #else
16: #ifdef HAVE_EXPAT_CONFIG_H
17: #include <expat_config.h>
18: #endif
19: #endif /* ndef COMPILED_FROM_DSP */
20:
21: #include "expat_external.h"
22: #include "internal.h"
23: #include "xmltok.h"
24: #include "nametab.h"
25:
26: #ifdef XML_DTD
27: #define IGNORE_SECTION_TOK_VTABLE , PREFIX(ignoreSectionTok)
28: #else
29: #define IGNORE_SECTION_TOK_VTABLE /* as nothing */
30: #endif
31:
32: #define VTABLE1 \
33: { PREFIX(prologTok), PREFIX(contentTok), \
34: PREFIX(cdataSectionTok) IGNORE_SECTION_TOK_VTABLE }, \
35: { PREFIX(attributeValueTok), PREFIX(entityValueTok) }, \
36: PREFIX(sameName), \
37: PREFIX(nameMatchesAscii), \
38: PREFIX(nameLength), \
39: PREFIX(skipS), \
40: PREFIX(getAtts), \
41: PREFIX(charRefNumber), \
42: PREFIX(predefinedEntityName), \
43: PREFIX(updatePosition), \
44: PREFIX(isPublicId)
45:
46: #define VTABLE VTABLE1, PREFIX(toUtf8), PREFIX(toUtf16)
47:
48: #define UCS2_GET_NAMING(pages, hi, lo) \
49: (namingBitmap[(pages[hi] << 3) + ((lo) >> 5)] & (1 << ((lo) & 0x1F)))
50:
51: /* A 2 byte UTF-8 representation splits the characters 11 bits between
52: the bottom 5 and 6 bits of the bytes. We need 8 bits to index into
53: pages, 3 bits to add to that index and 5 bits to generate the mask.
54: */
55: #define UTF8_GET_NAMING2(pages, byte) \
56: (namingBitmap[((pages)[(((byte)[0]) >> 2) & 7] << 3) \
57: + ((((byte)[0]) & 3) << 1) \
58: + ((((byte)[1]) >> 5) & 1)] \
59: & (1 << (((byte)[1]) & 0x1F)))
60:
61: /* A 3 byte UTF-8 representation splits the characters 16 bits between
62: the bottom 4, 6 and 6 bits of the bytes. We need 8 bits to index
63: into pages, 3 bits to add to that index and 5 bits to generate the
64: mask.
65: */
66: #define UTF8_GET_NAMING3(pages, byte) \
67: (namingBitmap[((pages)[((((byte)[0]) & 0xF) << 4) \
68: + ((((byte)[1]) >> 2) & 0xF)] \
69: << 3) \
70: + ((((byte)[1]) & 3) << 1) \
71: + ((((byte)[2]) >> 5) & 1)] \
72: & (1 << (((byte)[2]) & 0x1F)))
73:
74: #define UTF8_GET_NAMING(pages, p, n) \
75: ((n) == 2 \
76: ? UTF8_GET_NAMING2(pages, (const unsigned char *)(p)) \
77: : ((n) == 3 \
78: ? UTF8_GET_NAMING3(pages, (const unsigned char *)(p)) \
79: : 0))
80:
81: /* Detection of invalid UTF-8 sequences is based on Table 3.1B
82: of Unicode 3.2: http://www.unicode.org/unicode/reports/tr28/
83: with the additional restriction of not allowing the Unicode
84: code points 0xFFFF and 0xFFFE (sequences EF,BF,BF and EF,BF,BE).
85: Implementation details:
86: (A & 0x80) == 0 means A < 0x80
87: and
88: (A & 0xC0) == 0xC0 means A > 0xBF
89: */
90:
91: #define UTF8_INVALID2(p) \
92: ((*p) < 0xC2 || ((p)[1] & 0x80) == 0 || ((p)[1] & 0xC0) == 0xC0)
93:
94: #define UTF8_INVALID3(p) \
95: (((p)[2] & 0x80) == 0 \
96: || \
97: ((*p) == 0xEF && (p)[1] == 0xBF \
98: ? \
99: (p)[2] > 0xBD \
100: : \
101: ((p)[2] & 0xC0) == 0xC0) \
102: || \
103: ((*p) == 0xE0 \
104: ? \
105: (p)[1] < 0xA0 || ((p)[1] & 0xC0) == 0xC0 \
106: : \
107: ((p)[1] & 0x80) == 0 \
108: || \
109: ((*p) == 0xED ? (p)[1] > 0x9F : ((p)[1] & 0xC0) == 0xC0)))
110:
111: #define UTF8_INVALID4(p) \
112: (((p)[3] & 0x80) == 0 || ((p)[3] & 0xC0) == 0xC0 \
113: || \
114: ((p)[2] & 0x80) == 0 || ((p)[2] & 0xC0) == 0xC0 \
115: || \
116: ((*p) == 0xF0 \
117: ? \
118: (p)[1] < 0x90 || ((p)[1] & 0xC0) == 0xC0 \
119: : \
120: ((p)[1] & 0x80) == 0 \
121: || \
122: ((*p) == 0xF4 ? (p)[1] > 0x8F : ((p)[1] & 0xC0) == 0xC0)))
123:
124: static int PTRFASTCALL
125: isNever(const ENCODING *enc, const char *p)
126: {
127: return 0;
128: }
129:
130: static int PTRFASTCALL
131: utf8_isName2(const ENCODING *enc, const char *p)
132: {
133: return UTF8_GET_NAMING2(namePages, (const unsigned char *)p);
134: }
135:
136: static int PTRFASTCALL
137: utf8_isName3(const ENCODING *enc, const char *p)
138: {
139: return UTF8_GET_NAMING3(namePages, (const unsigned char *)p);
140: }
141:
142: #define utf8_isName4 isNever
143:
144: static int PTRFASTCALL
145: utf8_isNmstrt2(const ENCODING *enc, const char *p)
146: {
147: return UTF8_GET_NAMING2(nmstrtPages, (const unsigned char *)p);
148: }
149:
150: static int PTRFASTCALL
151: utf8_isNmstrt3(const ENCODING *enc, const char *p)
152: {
153: return UTF8_GET_NAMING3(nmstrtPages, (const unsigned char *)p);
154: }
155:
156: #define utf8_isNmstrt4 isNever
157:
158: static int PTRFASTCALL
159: utf8_isInvalid2(const ENCODING *enc, const char *p)
160: {
161: return UTF8_INVALID2((const unsigned char *)p);
162: }
163:
164: static int PTRFASTCALL
165: utf8_isInvalid3(const ENCODING *enc, const char *p)
166: {
167: return UTF8_INVALID3((const unsigned char *)p);
168: }
169:
170: static int PTRFASTCALL
171: utf8_isInvalid4(const ENCODING *enc, const char *p)
172: {
173: return UTF8_INVALID4((const unsigned char *)p);
174: }
175:
176: struct normal_encoding {
177: ENCODING enc;
178: unsigned char type[256];
179: #ifdef XML_MIN_SIZE
180: int (PTRFASTCALL *byteType)(const ENCODING *, const char *);
181: int (PTRFASTCALL *isNameMin)(const ENCODING *, const char *);
182: int (PTRFASTCALL *isNmstrtMin)(const ENCODING *, const char *);
183: int (PTRFASTCALL *byteToAscii)(const ENCODING *, const char *);
184: int (PTRCALL *charMatches)(const ENCODING *, const char *, int);
185: #endif /* XML_MIN_SIZE */
186: int (PTRFASTCALL *isName2)(const ENCODING *, const char *);
187: int (PTRFASTCALL *isName3)(const ENCODING *, const char *);
188: int (PTRFASTCALL *isName4)(const ENCODING *, const char *);
189: int (PTRFASTCALL *isNmstrt2)(const ENCODING *, const char *);
190: int (PTRFASTCALL *isNmstrt3)(const ENCODING *, const char *);
191: int (PTRFASTCALL *isNmstrt4)(const ENCODING *, const char *);
192: int (PTRFASTCALL *isInvalid2)(const ENCODING *, const char *);
193: int (PTRFASTCALL *isInvalid3)(const ENCODING *, const char *);
194: int (PTRFASTCALL *isInvalid4)(const ENCODING *, const char *);
195: };
196:
197: #define AS_NORMAL_ENCODING(enc) ((const struct normal_encoding *) (enc))
198:
199: #ifdef XML_MIN_SIZE
200:
201: #define STANDARD_VTABLE(E) \
202: E ## byteType, \
203: E ## isNameMin, \
204: E ## isNmstrtMin, \
205: E ## byteToAscii, \
206: E ## charMatches,
207:
208: #else
209:
210: #define STANDARD_VTABLE(E) /* as nothing */
211:
212: #endif
213:
214: #define NORMAL_VTABLE(E) \
215: E ## isName2, \
216: E ## isName3, \
217: E ## isName4, \
218: E ## isNmstrt2, \
219: E ## isNmstrt3, \
220: E ## isNmstrt4, \
221: E ## isInvalid2, \
222: E ## isInvalid3, \
223: E ## isInvalid4
224:
225: static int FASTCALL checkCharRefNumber(int);
226:
227: #include "xmltok_impl.h"
228: #include "ascii.h"
229:
230: #ifdef XML_MIN_SIZE
231: #define sb_isNameMin isNever
232: #define sb_isNmstrtMin isNever
233: #endif
234:
235: #ifdef XML_MIN_SIZE
236: #define MINBPC(enc) ((enc)->minBytesPerChar)
237: #else
238: /* minimum bytes per character */
239: #define MINBPC(enc) 1
240: #endif
241:
242: #define SB_BYTE_TYPE(enc, p) \
243: (((struct normal_encoding *)(enc))->type[(unsigned char)*(p)])
244:
245: #ifdef XML_MIN_SIZE
246: static int PTRFASTCALL
247: sb_byteType(const ENCODING *enc, const char *p)
248: {
249: return SB_BYTE_TYPE(enc, p);
250: }
251: #define BYTE_TYPE(enc, p) \
252: (AS_NORMAL_ENCODING(enc)->byteType(enc, p))
253: #else
254: #define BYTE_TYPE(enc, p) SB_BYTE_TYPE(enc, p)
255: #endif
256:
257: #ifdef XML_MIN_SIZE
258: #define BYTE_TO_ASCII(enc, p) \
259: (AS_NORMAL_ENCODING(enc)->byteToAscii(enc, p))
260: static int PTRFASTCALL
261: sb_byteToAscii(const ENCODING *enc, const char *p)
262: {
263: return *p;
264: }
265: #else
266: #define BYTE_TO_ASCII(enc, p) (*(p))
267: #endif
268:
269: #define IS_NAME_CHAR(enc, p, n) \
270: (AS_NORMAL_ENCODING(enc)->isName ## n(enc, p))
271: #define IS_NMSTRT_CHAR(enc, p, n) \
272: (AS_NORMAL_ENCODING(enc)->isNmstrt ## n(enc, p))
273: #define IS_INVALID_CHAR(enc, p, n) \
274: (AS_NORMAL_ENCODING(enc)->isInvalid ## n(enc, p))
275:
276: #ifdef XML_MIN_SIZE
277: #define IS_NAME_CHAR_MINBPC(enc, p) \
278: (AS_NORMAL_ENCODING(enc)->isNameMin(enc, p))
279: #define IS_NMSTRT_CHAR_MINBPC(enc, p) \
280: (AS_NORMAL_ENCODING(enc)->isNmstrtMin(enc, p))
281: #else
282: #define IS_NAME_CHAR_MINBPC(enc, p) (0)
283: #define IS_NMSTRT_CHAR_MINBPC(enc, p) (0)
284: #endif
285:
286: #ifdef XML_MIN_SIZE
287: #define CHAR_MATCHES(enc, p, c) \
288: (AS_NORMAL_ENCODING(enc)->charMatches(enc, p, c))
289: static int PTRCALL
290: sb_charMatches(const ENCODING *enc, const char *p, int c)
291: {
292: return *p == c;
293: }
294: #else
295: /* c is an ASCII character */
296: #define CHAR_MATCHES(enc, p, c) (*(p) == c)
297: #endif
298:
299: #define PREFIX(ident) normal_ ## ident
300: #define XML_TOK_IMPL_C
301: #include "xmltok_impl.c"
302: #undef XML_TOK_IMPL_C
303:
304: #undef MINBPC
305: #undef BYTE_TYPE
306: #undef BYTE_TO_ASCII
307: #undef CHAR_MATCHES
308: #undef IS_NAME_CHAR
309: #undef IS_NAME_CHAR_MINBPC
310: #undef IS_NMSTRT_CHAR
311: #undef IS_NMSTRT_CHAR_MINBPC
312: #undef IS_INVALID_CHAR
313:
314: enum { /* UTF8_cvalN is value of masked first byte of N byte sequence */
315: UTF8_cval1 = 0x00,
316: UTF8_cval2 = 0xc0,
317: UTF8_cval3 = 0xe0,
318: UTF8_cval4 = 0xf0
319: };
320:
321: static void PTRCALL
322: utf8_toUtf8(const ENCODING *enc,
323: const char **fromP, const char *fromLim,
324: char **toP, const char *toLim)
325: {
326: char *to;
327: const char *from;
328: if (fromLim - *fromP > toLim - *toP) {
329: /* Avoid copying partial characters. */
330: for (fromLim = *fromP + (toLim - *toP); fromLim > *fromP; fromLim--)
331: if (((unsigned char)fromLim[-1] & 0xc0) != 0x80)
332: break;
333: }
334: for (to = *toP, from = *fromP; from != fromLim; from++, to++)
335: *to = *from;
336: *fromP = from;
337: *toP = to;
338: }
339:
340: static void PTRCALL
341: utf8_toUtf16(const ENCODING *enc,
342: const char **fromP, const char *fromLim,
343: unsigned short **toP, const unsigned short *toLim)
344: {
345: unsigned short *to = *toP;
346: const char *from = *fromP;
347: while (from != fromLim && to != toLim) {
348: switch (((struct normal_encoding *)enc)->type[(unsigned char)*from]) {
349: case BT_LEAD2:
350: *to++ = (unsigned short)(((from[0] & 0x1f) << 6) | (from[1] & 0x3f));
351: from += 2;
352: break;
353: case BT_LEAD3:
354: *to++ = (unsigned short)(((from[0] & 0xf) << 12)
355: | ((from[1] & 0x3f) << 6) | (from[2] & 0x3f));
356: from += 3;
357: break;
358: case BT_LEAD4:
359: {
360: unsigned long n;
361: if (to + 1 == toLim)
362: goto after;
363: n = ((from[0] & 0x7) << 18) | ((from[1] & 0x3f) << 12)
364: | ((from[2] & 0x3f) << 6) | (from[3] & 0x3f);
365: n -= 0x10000;
366: to[0] = (unsigned short)((n >> 10) | 0xD800);
367: to[1] = (unsigned short)((n & 0x3FF) | 0xDC00);
368: to += 2;
369: from += 4;
370: }
371: break;
372: default:
373: *to++ = *from++;
374: break;
375: }
376: }
377: after:
378: *fromP = from;
379: *toP = to;
380: }
381:
382: #ifdef XML_NS
383: static const struct normal_encoding utf8_encoding_ns = {
384: { VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
385: {
386: #include "asciitab.h"
387: #include "utf8tab.h"
388: },
389: STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
390: };
391: #endif
392:
393: static const struct normal_encoding utf8_encoding = {
394: { VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
395: {
396: #define BT_COLON BT_NMSTRT
397: #include "asciitab.h"
398: #undef BT_COLON
399: #include "utf8tab.h"
400: },
401: STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
402: };
403:
404: #ifdef XML_NS
405:
406: static const struct normal_encoding internal_utf8_encoding_ns = {
407: { VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
408: {
409: #include "iasciitab.h"
410: #include "utf8tab.h"
411: },
412: STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
413: };
414:
415: #endif
416:
417: static const struct normal_encoding internal_utf8_encoding = {
418: { VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
419: {
420: #define BT_COLON BT_NMSTRT
421: #include "iasciitab.h"
422: #undef BT_COLON
423: #include "utf8tab.h"
424: },
425: STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
426: };
427:
428: static void PTRCALL
429: latin1_toUtf8(const ENCODING *enc,
430: const char **fromP, const char *fromLim,
431: char **toP, const char *toLim)
432: {
433: for (;;) {
434: unsigned char c;
435: if (*fromP == fromLim)
436: break;
437: c = (unsigned char)**fromP;
438: if (c & 0x80) {
439: if (toLim - *toP < 2)
440: break;
441: *(*toP)++ = (char)((c >> 6) | UTF8_cval2);
442: *(*toP)++ = (char)((c & 0x3f) | 0x80);
443: (*fromP)++;
444: }
445: else {
446: if (*toP == toLim)
447: break;
448: *(*toP)++ = *(*fromP)++;
449: }
450: }
451: }
452:
453: static void PTRCALL
454: latin1_toUtf16(const ENCODING *enc,
455: const char **fromP, const char *fromLim,
456: unsigned short **toP, const unsigned short *toLim)
457: {
458: while (*fromP != fromLim && *toP != toLim)
459: *(*toP)++ = (unsigned char)*(*fromP)++;
460: }
461:
462: #ifdef XML_NS
463:
464: static const struct normal_encoding latin1_encoding_ns = {
465: { VTABLE1, latin1_toUtf8, latin1_toUtf16, 1, 0, 0 },
466: {
467: #include "asciitab.h"
468: #include "latin1tab.h"
469: },
470: STANDARD_VTABLE(sb_)
471: };
472:
473: #endif
474:
475: static const struct normal_encoding latin1_encoding = {
476: { VTABLE1, latin1_toUtf8, latin1_toUtf16, 1, 0, 0 },
477: {
478: #define BT_COLON BT_NMSTRT
479: #include "asciitab.h"
480: #undef BT_COLON
481: #include "latin1tab.h"
482: },
483: STANDARD_VTABLE(sb_)
484: };
485:
486: static void PTRCALL
487: ascii_toUtf8(const ENCODING *enc,
488: const char **fromP, const char *fromLim,
489: char **toP, const char *toLim)
490: {
491: while (*fromP != fromLim && *toP != toLim)
492: *(*toP)++ = *(*fromP)++;
493: }
494:
495: #ifdef XML_NS
496:
497: static const struct normal_encoding ascii_encoding_ns = {
498: { VTABLE1, ascii_toUtf8, latin1_toUtf16, 1, 1, 0 },
499: {
500: #include "asciitab.h"
501: /* BT_NONXML == 0 */
502: },
503: STANDARD_VTABLE(sb_)
504: };
505:
506: #endif
507:
508: static const struct normal_encoding ascii_encoding = {
509: { VTABLE1, ascii_toUtf8, latin1_toUtf16, 1, 1, 0 },
510: {
511: #define BT_COLON BT_NMSTRT
512: #include "asciitab.h"
513: #undef BT_COLON
514: /* BT_NONXML == 0 */
515: },
516: STANDARD_VTABLE(sb_)
517: };
518:
519: static int PTRFASTCALL
520: unicode_byte_type(char hi, char lo)
521: {
522: switch ((unsigned char)hi) {
523: case 0xD8: case 0xD9: case 0xDA: case 0xDB:
524: return BT_LEAD4;
525: case 0xDC: case 0xDD: case 0xDE: case 0xDF:
526: return BT_TRAIL;
527: case 0xFF:
528: switch ((unsigned char)lo) {
529: case 0xFF:
530: case 0xFE:
531: return BT_NONXML;
532: }
533: break;
534: }
535: return BT_NONASCII;
536: }
537:
538: #define DEFINE_UTF16_TO_UTF8(E) \
539: static void PTRCALL \
540: E ## toUtf8(const ENCODING *enc, \
541: const char **fromP, const char *fromLim, \
542: char **toP, const char *toLim) \
543: { \
544: const char *from; \
545: for (from = *fromP; from != fromLim; from += 2) { \
546: int plane; \
547: unsigned char lo2; \
548: unsigned char lo = GET_LO(from); \
549: unsigned char hi = GET_HI(from); \
550: switch (hi) { \
551: case 0: \
552: if (lo < 0x80) { \
553: if (*toP == toLim) { \
554: *fromP = from; \
555: return; \
556: } \
557: *(*toP)++ = lo; \
558: break; \
559: } \
560: /* fall through */ \
561: case 0x1: case 0x2: case 0x3: \
562: case 0x4: case 0x5: case 0x6: case 0x7: \
563: if (toLim - *toP < 2) { \
564: *fromP = from; \
565: return; \
566: } \
567: *(*toP)++ = ((lo >> 6) | (hi << 2) | UTF8_cval2); \
568: *(*toP)++ = ((lo & 0x3f) | 0x80); \
569: break; \
570: default: \
571: if (toLim - *toP < 3) { \
572: *fromP = from; \
573: return; \
574: } \
575: /* 16 bits divided 4, 6, 6 amongst 3 bytes */ \
576: *(*toP)++ = ((hi >> 4) | UTF8_cval3); \
577: *(*toP)++ = (((hi & 0xf) << 2) | (lo >> 6) | 0x80); \
578: *(*toP)++ = ((lo & 0x3f) | 0x80); \
579: break; \
580: case 0xD8: case 0xD9: case 0xDA: case 0xDB: \
581: if (toLim - *toP < 4) { \
582: *fromP = from; \
583: return; \
584: } \
585: plane = (((hi & 0x3) << 2) | ((lo >> 6) & 0x3)) + 1; \
586: *(*toP)++ = ((plane >> 2) | UTF8_cval4); \
587: *(*toP)++ = (((lo >> 2) & 0xF) | ((plane & 0x3) << 4) | 0x80); \
588: from += 2; \
589: lo2 = GET_LO(from); \
590: *(*toP)++ = (((lo & 0x3) << 4) \
591: | ((GET_HI(from) & 0x3) << 2) \
592: | (lo2 >> 6) \
593: | 0x80); \
594: *(*toP)++ = ((lo2 & 0x3f) | 0x80); \
595: break; \
596: } \
597: } \
598: *fromP = from; \
599: }
600:
601: #define DEFINE_UTF16_TO_UTF16(E) \
602: static void PTRCALL \
603: E ## toUtf16(const ENCODING *enc, \
604: const char **fromP, const char *fromLim, \
605: unsigned short **toP, const unsigned short *toLim) \
606: { \
607: /* Avoid copying first half only of surrogate */ \
608: if (fromLim - *fromP > ((toLim - *toP) << 1) \
609: && (GET_HI(fromLim - 2) & 0xF8) == 0xD8) \
610: fromLim -= 2; \
611: for (; *fromP != fromLim && *toP != toLim; *fromP += 2) \
612: *(*toP)++ = (GET_HI(*fromP) << 8) | GET_LO(*fromP); \
613: }
614:
615: #define SET2(ptr, ch) \
616: (((ptr)[0] = ((ch) & 0xff)), ((ptr)[1] = ((ch) >> 8)))
617: #define GET_LO(ptr) ((unsigned char)(ptr)[0])
618: #define GET_HI(ptr) ((unsigned char)(ptr)[1])
619:
620: DEFINE_UTF16_TO_UTF8(little2_)
621: DEFINE_UTF16_TO_UTF16(little2_)
622:
623: #undef SET2
624: #undef GET_LO
625: #undef GET_HI
626:
627: #define SET2(ptr, ch) \
628: (((ptr)[0] = ((ch) >> 8)), ((ptr)[1] = ((ch) & 0xFF)))
629: #define GET_LO(ptr) ((unsigned char)(ptr)[1])
630: #define GET_HI(ptr) ((unsigned char)(ptr)[0])
631:
632: DEFINE_UTF16_TO_UTF8(big2_)
633: DEFINE_UTF16_TO_UTF16(big2_)
634:
635: #undef SET2
636: #undef GET_LO
637: #undef GET_HI
638:
639: #define LITTLE2_BYTE_TYPE(enc, p) \
640: ((p)[1] == 0 \
641: ? ((struct normal_encoding *)(enc))->type[(unsigned char)*(p)] \
642: : unicode_byte_type((p)[1], (p)[0]))
643: #define LITTLE2_BYTE_TO_ASCII(enc, p) ((p)[1] == 0 ? (p)[0] : -1)
644: #define LITTLE2_CHAR_MATCHES(enc, p, c) ((p)[1] == 0 && (p)[0] == c)
645: #define LITTLE2_IS_NAME_CHAR_MINBPC(enc, p) \
646: UCS2_GET_NAMING(namePages, (unsigned char)p[1], (unsigned char)p[0])
647: #define LITTLE2_IS_NMSTRT_CHAR_MINBPC(enc, p) \
648: UCS2_GET_NAMING(nmstrtPages, (unsigned char)p[1], (unsigned char)p[0])
649:
650: #ifdef XML_MIN_SIZE
651:
652: static int PTRFASTCALL
653: little2_byteType(const ENCODING *enc, const char *p)
654: {
655: return LITTLE2_BYTE_TYPE(enc, p);
656: }
657:
658: static int PTRFASTCALL
659: little2_byteToAscii(const ENCODING *enc, const char *p)
660: {
661: return LITTLE2_BYTE_TO_ASCII(enc, p);
662: }
663:
664: static int PTRCALL
665: little2_charMatches(const ENCODING *enc, const char *p, int c)
666: {
667: return LITTLE2_CHAR_MATCHES(enc, p, c);
668: }
669:
670: static int PTRFASTCALL
671: little2_isNameMin(const ENCODING *enc, const char *p)
672: {
673: return LITTLE2_IS_NAME_CHAR_MINBPC(enc, p);
674: }
675:
676: static int PTRFASTCALL
677: little2_isNmstrtMin(const ENCODING *enc, const char *p)
678: {
679: return LITTLE2_IS_NMSTRT_CHAR_MINBPC(enc, p);
680: }
681:
682: #undef VTABLE
683: #define VTABLE VTABLE1, little2_toUtf8, little2_toUtf16
684:
685: #else /* not XML_MIN_SIZE */
686:
687: #undef PREFIX
688: #define PREFIX(ident) little2_ ## ident
689: #define MINBPC(enc) 2
690: /* CHAR_MATCHES is guaranteed to have MINBPC bytes available. */
691: #define BYTE_TYPE(enc, p) LITTLE2_BYTE_TYPE(enc, p)
692: #define BYTE_TO_ASCII(enc, p) LITTLE2_BYTE_TO_ASCII(enc, p)
693: #define CHAR_MATCHES(enc, p, c) LITTLE2_CHAR_MATCHES(enc, p, c)
694: #define IS_NAME_CHAR(enc, p, n) 0
695: #define IS_NAME_CHAR_MINBPC(enc, p) LITTLE2_IS_NAME_CHAR_MINBPC(enc, p)
696: #define IS_NMSTRT_CHAR(enc, p, n) (0)
697: #define IS_NMSTRT_CHAR_MINBPC(enc, p) LITTLE2_IS_NMSTRT_CHAR_MINBPC(enc, p)
698:
699: #define XML_TOK_IMPL_C
700: #include "xmltok_impl.c"
701: #undef XML_TOK_IMPL_C
702:
703: #undef MINBPC
704: #undef BYTE_TYPE
705: #undef BYTE_TO_ASCII
706: #undef CHAR_MATCHES
707: #undef IS_NAME_CHAR
708: #undef IS_NAME_CHAR_MINBPC
709: #undef IS_NMSTRT_CHAR
710: #undef IS_NMSTRT_CHAR_MINBPC
711: #undef IS_INVALID_CHAR
712:
713: #endif /* not XML_MIN_SIZE */
714:
715: #ifdef XML_NS
716:
717: static const struct normal_encoding little2_encoding_ns = {
718: { VTABLE, 2, 0,
719: #if BYTEORDER == 1234
720: 1
721: #else
722: 0
723: #endif
724: },
725: {
726: #include "asciitab.h"
727: #include "latin1tab.h"
728: },
729: STANDARD_VTABLE(little2_)
730: };
731:
732: #endif
733:
734: static const struct normal_encoding little2_encoding = {
735: { VTABLE, 2, 0,
736: #if BYTEORDER == 1234
737: 1
738: #else
739: 0
740: #endif
741: },
742: {
743: #define BT_COLON BT_NMSTRT
744: #include "asciitab.h"
745: #undef BT_COLON
746: #include "latin1tab.h"
747: },
748: STANDARD_VTABLE(little2_)
749: };
750:
751: #if BYTEORDER != 4321
752:
753: #ifdef XML_NS
754:
755: static const struct normal_encoding internal_little2_encoding_ns = {
756: { VTABLE, 2, 0, 1 },
757: {
758: #include "iasciitab.h"
759: #include "latin1tab.h"
760: },
761: STANDARD_VTABLE(little2_)
762: };
763:
764: #endif
765:
766: static const struct normal_encoding internal_little2_encoding = {
767: { VTABLE, 2, 0, 1 },
768: {
769: #define BT_COLON BT_NMSTRT
770: #include "iasciitab.h"
771: #undef BT_COLON
772: #include "latin1tab.h"
773: },
774: STANDARD_VTABLE(little2_)
775: };
776:
777: #endif
778:
779:
780: #define BIG2_BYTE_TYPE(enc, p) \
781: ((p)[0] == 0 \
782: ? ((struct normal_encoding *)(enc))->type[(unsigned char)(p)[1]] \
783: : unicode_byte_type((p)[0], (p)[1]))
784: #define BIG2_BYTE_TO_ASCII(enc, p) ((p)[0] == 0 ? (p)[1] : -1)
785: #define BIG2_CHAR_MATCHES(enc, p, c) ((p)[0] == 0 && (p)[1] == c)
786: #define BIG2_IS_NAME_CHAR_MINBPC(enc, p) \
787: UCS2_GET_NAMING(namePages, (unsigned char)p[0], (unsigned char)p[1])
788: #define BIG2_IS_NMSTRT_CHAR_MINBPC(enc, p) \
789: UCS2_GET_NAMING(nmstrtPages, (unsigned char)p[0], (unsigned char)p[1])
790:
791: #ifdef XML_MIN_SIZE
792:
793: static int PTRFASTCALL
794: big2_byteType(const ENCODING *enc, const char *p)
795: {
796: return BIG2_BYTE_TYPE(enc, p);
797: }
798:
799: static int PTRFASTCALL
800: big2_byteToAscii(const ENCODING *enc, const char *p)
801: {
802: return BIG2_BYTE_TO_ASCII(enc, p);
803: }
804:
805: static int PTRCALL
806: big2_charMatches(const ENCODING *enc, const char *p, int c)
807: {
808: return BIG2_CHAR_MATCHES(enc, p, c);
809: }
810:
811: static int PTRFASTCALL
812: big2_isNameMin(const ENCODING *enc, const char *p)
813: {
814: return BIG2_IS_NAME_CHAR_MINBPC(enc, p);
815: }
816:
817: static int PTRFASTCALL
818: big2_isNmstrtMin(const ENCODING *enc, const char *p)
819: {
820: return BIG2_IS_NMSTRT_CHAR_MINBPC(enc, p);
821: }
822:
823: #undef VTABLE
824: #define VTABLE VTABLE1, big2_toUtf8, big2_toUtf16
825:
826: #else /* not XML_MIN_SIZE */
827:
828: #undef PREFIX
829: #define PREFIX(ident) big2_ ## ident
830: #define MINBPC(enc) 2
831: /* CHAR_MATCHES is guaranteed to have MINBPC bytes available. */
832: #define BYTE_TYPE(enc, p) BIG2_BYTE_TYPE(enc, p)
833: #define BYTE_TO_ASCII(enc, p) BIG2_BYTE_TO_ASCII(enc, p)
834: #define CHAR_MATCHES(enc, p, c) BIG2_CHAR_MATCHES(enc, p, c)
835: #define IS_NAME_CHAR(enc, p, n) 0
836: #define IS_NAME_CHAR_MINBPC(enc, p) BIG2_IS_NAME_CHAR_MINBPC(enc, p)
837: #define IS_NMSTRT_CHAR(enc, p, n) (0)
838: #define IS_NMSTRT_CHAR_MINBPC(enc, p) BIG2_IS_NMSTRT_CHAR_MINBPC(enc, p)
839:
840: #define XML_TOK_IMPL_C
841: #include "xmltok_impl.c"
842: #undef XML_TOK_IMPL_C
843:
844: #undef MINBPC
845: #undef BYTE_TYPE
846: #undef BYTE_TO_ASCII
847: #undef CHAR_MATCHES
848: #undef IS_NAME_CHAR
849: #undef IS_NAME_CHAR_MINBPC
850: #undef IS_NMSTRT_CHAR
851: #undef IS_NMSTRT_CHAR_MINBPC
852: #undef IS_INVALID_CHAR
853:
854: #endif /* not XML_MIN_SIZE */
855:
856: #ifdef XML_NS
857:
858: static const struct normal_encoding big2_encoding_ns = {
859: { VTABLE, 2, 0,
860: #if BYTEORDER == 4321
861: 1
862: #else
863: 0
864: #endif
865: },
866: {
867: #include "asciitab.h"
868: #include "latin1tab.h"
869: },
870: STANDARD_VTABLE(big2_)
871: };
872:
873: #endif
874:
875: static const struct normal_encoding big2_encoding = {
876: { VTABLE, 2, 0,
877: #if BYTEORDER == 4321
878: 1
879: #else
880: 0
881: #endif
882: },
883: {
884: #define BT_COLON BT_NMSTRT
885: #include "asciitab.h"
886: #undef BT_COLON
887: #include "latin1tab.h"
888: },
889: STANDARD_VTABLE(big2_)
890: };
891:
892: #if BYTEORDER != 1234
893:
894: #ifdef XML_NS
895:
896: static const struct normal_encoding internal_big2_encoding_ns = {
897: { VTABLE, 2, 0, 1 },
898: {
899: #include "iasciitab.h"
900: #include "latin1tab.h"
901: },
902: STANDARD_VTABLE(big2_)
903: };
904:
905: #endif
906:
907: static const struct normal_encoding internal_big2_encoding = {
908: { VTABLE, 2, 0, 1 },
909: {
910: #define BT_COLON BT_NMSTRT
911: #include "iasciitab.h"
912: #undef BT_COLON
913: #include "latin1tab.h"
914: },
915: STANDARD_VTABLE(big2_)
916: };
917:
918: #endif
919:
920: #undef PREFIX
921:
922: static int FASTCALL
923: streqci(const char *s1, const char *s2)
924: {
925: for (;;) {
926: char c1 = *s1++;
927: char c2 = *s2++;
928: if (ASCII_a <= c1 && c1 <= ASCII_z)
929: c1 += ASCII_A - ASCII_a;
930: if (ASCII_a <= c2 && c2 <= ASCII_z)
931: c2 += ASCII_A - ASCII_a;
932: if (c1 != c2)
933: return 0;
934: if (!c1)
935: break;
936: }
937: return 1;
938: }
939:
940: static void PTRCALL
941: initUpdatePosition(const ENCODING *enc, const char *ptr,
942: const char *end, POSITION *pos)
943: {
944: normal_updatePosition(&utf8_encoding.enc, ptr, end, pos);
945: }
946:
947: static int
948: toAscii(const ENCODING *enc, const char *ptr, const char *end)
949: {
950: char buf[1];
951: char *p = buf;
952: XmlUtf8Convert(enc, &ptr, end, &p, p + 1);
953: if (p == buf)
954: return -1;
955: else
956: return buf[0];
957: }
958:
959: static int FASTCALL
960: isSpace(int c)
961: {
962: switch (c) {
963: case 0x20:
964: case 0xD:
965: case 0xA:
966: case 0x9:
967: return 1;
968: }
969: return 0;
970: }
971:
972: /* Return 1 if there's just optional white space or there's an S
973: followed by name=val.
974: */
975: static int
976: parsePseudoAttribute(const ENCODING *enc,
977: const char *ptr,
978: const char *end,
979: const char **namePtr,
980: const char **nameEndPtr,
981: const char **valPtr,
982: const char **nextTokPtr)
983: {
984: int c;
985: char open;
986: if (ptr == end) {
987: *namePtr = NULL;
988: return 1;
989: }
990: if (!isSpace(toAscii(enc, ptr, end))) {
991: *nextTokPtr = ptr;
992: return 0;
993: }
994: do {
995: ptr += enc->minBytesPerChar;
996: } while (isSpace(toAscii(enc, ptr, end)));
997: if (ptr == end) {
998: *namePtr = NULL;
999: return 1;
1000: }
1001: *namePtr = ptr;
1002: for (;;) {
1003: c = toAscii(enc, ptr, end);
1004: if (c == -1) {
1005: *nextTokPtr = ptr;
1006: return 0;
1007: }
1008: if (c == ASCII_EQUALS) {
1009: *nameEndPtr = ptr;
1010: break;
1011: }
1012: if (isSpace(c)) {
1013: *nameEndPtr = ptr;
1014: do {
1015: ptr += enc->minBytesPerChar;
1016: } while (isSpace(c = toAscii(enc, ptr, end)));
1017: if (c != ASCII_EQUALS) {
1018: *nextTokPtr = ptr;
1019: return 0;
1020: }
1021: break;
1022: }
1023: ptr += enc->minBytesPerChar;
1024: }
1025: if (ptr == *namePtr) {
1026: *nextTokPtr = ptr;
1027: return 0;
1028: }
1029: ptr += enc->minBytesPerChar;
1030: c = toAscii(enc, ptr, end);
1031: while (isSpace(c)) {
1032: ptr += enc->minBytesPerChar;
1033: c = toAscii(enc, ptr, end);
1034: }
1035: if (c != ASCII_QUOT && c != ASCII_APOS) {
1036: *nextTokPtr = ptr;
1037: return 0;
1038: }
1039: open = (char)c;
1040: ptr += enc->minBytesPerChar;
1041: *valPtr = ptr;
1042: for (;; ptr += enc->minBytesPerChar) {
1043: c = toAscii(enc, ptr, end);
1044: if (c == open)
1045: break;
1046: if (!(ASCII_a <= c && c <= ASCII_z)
1047: && !(ASCII_A <= c && c <= ASCII_Z)
1048: && !(ASCII_0 <= c && c <= ASCII_9)
1049: && c != ASCII_PERIOD
1050: && c != ASCII_MINUS
1051: && c != ASCII_UNDERSCORE) {
1052: *nextTokPtr = ptr;
1053: return 0;
1054: }
1055: }
1056: *nextTokPtr = ptr + enc->minBytesPerChar;
1057: return 1;
1058: }
1059:
1060: static const char KW_version[] = {
1061: ASCII_v, ASCII_e, ASCII_r, ASCII_s, ASCII_i, ASCII_o, ASCII_n, '\0'
1062: };
1063:
1064: static const char KW_encoding[] = {
1065: ASCII_e, ASCII_n, ASCII_c, ASCII_o, ASCII_d, ASCII_i, ASCII_n, ASCII_g, '\0'
1066: };
1067:
1068: static const char KW_standalone[] = {
1069: ASCII_s, ASCII_t, ASCII_a, ASCII_n, ASCII_d, ASCII_a, ASCII_l, ASCII_o,
1070: ASCII_n, ASCII_e, '\0'
1071: };
1072:
1073: static const char KW_yes[] = {
1074: ASCII_y, ASCII_e, ASCII_s, '\0'
1075: };
1076:
1077: static const char KW_no[] = {
1078: ASCII_n, ASCII_o, '\0'
1079: };
1080:
1081: static int
1082: doParseXmlDecl(const ENCODING *(*encodingFinder)(const ENCODING *,
1083: const char *,
1084: const char *),
1085: int isGeneralTextEntity,
1086: const ENCODING *enc,
1087: const char *ptr,
1088: const char *end,
1089: const char **badPtr,
1090: const char **versionPtr,
1091: const char **versionEndPtr,
1092: const char **encodingName,
1093: const ENCODING **encoding,
1094: int *standalone)
1095: {
1096: const char *val = NULL;
1097: const char *name = NULL;
1098: const char *nameEnd = NULL;
1099: ptr += 5 * enc->minBytesPerChar;
1100: end -= 2 * enc->minBytesPerChar;
1101: if (!parsePseudoAttribute(enc, ptr, end, &name, &nameEnd, &val, &ptr)
1102: || !name) {
1103: *badPtr = ptr;
1104: return 0;
1105: }
1106: if (!XmlNameMatchesAscii(enc, name, nameEnd, KW_version)) {
1107: if (!isGeneralTextEntity) {
1108: *badPtr = name;
1109: return 0;
1110: }
1111: }
1112: else {
1113: if (versionPtr)
1114: *versionPtr = val;
1115: if (versionEndPtr)
1116: *versionEndPtr = ptr;
1117: if (!parsePseudoAttribute(enc, ptr, end, &name, &nameEnd, &val, &ptr)) {
1118: *badPtr = ptr;
1119: return 0;
1120: }
1121: if (!name) {
1122: if (isGeneralTextEntity) {
1123: /* a TextDecl must have an EncodingDecl */
1124: *badPtr = ptr;
1125: return 0;
1126: }
1127: return 1;
1128: }
1129: }
1130: if (XmlNameMatchesAscii(enc, name, nameEnd, KW_encoding)) {
1131: int c = toAscii(enc, val, end);
1132: if (!(ASCII_a <= c && c <= ASCII_z) && !(ASCII_A <= c && c <= ASCII_Z)) {
1133: *badPtr = val;
1134: return 0;
1135: }
1136: if (encodingName)
1137: *encodingName = val;
1138: if (encoding)
1139: *encoding = encodingFinder(enc, val, ptr - enc->minBytesPerChar);
1140: if (!parsePseudoAttribute(enc, ptr, end, &name, &nameEnd, &val, &ptr)) {
1141: *badPtr = ptr;
1142: return 0;
1143: }
1144: if (!name)
1145: return 1;
1146: }
1147: if (!XmlNameMatchesAscii(enc, name, nameEnd, KW_standalone)
1148: || isGeneralTextEntity) {
1149: *badPtr = name;
1150: return 0;
1151: }
1152: if (XmlNameMatchesAscii(enc, val, ptr - enc->minBytesPerChar, KW_yes)) {
1153: if (standalone)
1154: *standalone = 1;
1155: }
1156: else if (XmlNameMatchesAscii(enc, val, ptr - enc->minBytesPerChar, KW_no)) {
1157: if (standalone)
1158: *standalone = 0;
1159: }
1160: else {
1161: *badPtr = val;
1162: return 0;
1163: }
1164: while (isSpace(toAscii(enc, ptr, end)))
1165: ptr += enc->minBytesPerChar;
1166: if (ptr != end) {
1167: *badPtr = ptr;
1168: return 0;
1169: }
1170: return 1;
1171: }
1172:
1173: static int FASTCALL
1174: checkCharRefNumber(int result)
1175: {
1176: switch (result >> 8) {
1177: case 0xD8: case 0xD9: case 0xDA: case 0xDB:
1178: case 0xDC: case 0xDD: case 0xDE: case 0xDF:
1179: return -1;
1180: case 0:
1181: if (latin1_encoding.type[result] == BT_NONXML)
1182: return -1;
1183: break;
1184: case 0xFF:
1185: if (result == 0xFFFE || result == 0xFFFF)
1186: return -1;
1187: break;
1188: }
1189: return result;
1190: }
1191:
1192: int FASTCALL
1193: XmlUtf8Encode(int c, char *buf)
1194: {
1195: enum {
1196: /* minN is minimum legal resulting value for N byte sequence */
1197: min2 = 0x80,
1198: min3 = 0x800,
1199: min4 = 0x10000
1200: };
1201:
1202: if (c < 0)
1203: return 0;
1204: if (c < min2) {
1205: buf[0] = (char)(c | UTF8_cval1);
1206: return 1;
1207: }
1208: if (c < min3) {
1209: buf[0] = (char)((c >> 6) | UTF8_cval2);
1210: buf[1] = (char)((c & 0x3f) | 0x80);
1211: return 2;
1212: }
1213: if (c < min4) {
1214: buf[0] = (char)((c >> 12) | UTF8_cval3);
1215: buf[1] = (char)(((c >> 6) & 0x3f) | 0x80);
1216: buf[2] = (char)((c & 0x3f) | 0x80);
1217: return 3;
1218: }
1219: if (c < 0x110000) {
1220: buf[0] = (char)((c >> 18) | UTF8_cval4);
1221: buf[1] = (char)(((c >> 12) & 0x3f) | 0x80);
1222: buf[2] = (char)(((c >> 6) & 0x3f) | 0x80);
1223: buf[3] = (char)((c & 0x3f) | 0x80);
1224: return 4;
1225: }
1226: return 0;
1227: }
1228:
1229: int FASTCALL
1230: XmlUtf16Encode(int charNum, unsigned short *buf)
1231: {
1232: if (charNum < 0)
1233: return 0;
1234: if (charNum < 0x10000) {
1235: buf[0] = (unsigned short)charNum;
1236: return 1;
1237: }
1238: if (charNum < 0x110000) {
1239: charNum -= 0x10000;
1240: buf[0] = (unsigned short)((charNum >> 10) + 0xD800);
1241: buf[1] = (unsigned short)((charNum & 0x3FF) + 0xDC00);
1242: return 2;
1243: }
1244: return 0;
1245: }
1246:
1247: struct unknown_encoding {
1248: struct normal_encoding normal;
1249: CONVERTER convert;
1250: void *userData;
1251: unsigned short utf16[256];
1252: char utf8[256][4];
1253: };
1254:
1255: #define AS_UNKNOWN_ENCODING(enc) ((const struct unknown_encoding *) (enc))
1256:
1257: int
1258: XmlSizeOfUnknownEncoding(void)
1259: {
1260: return sizeof(struct unknown_encoding);
1261: }
1262:
1263: static int PTRFASTCALL
1264: unknown_isName(const ENCODING *enc, const char *p)
1265: {
1266: const struct unknown_encoding *uenc = AS_UNKNOWN_ENCODING(enc);
1267: int c = uenc->convert(uenc->userData, p);
1268: if (c & ~0xFFFF)
1269: return 0;
1270: return UCS2_GET_NAMING(namePages, c >> 8, c & 0xFF);
1271: }
1272:
1273: static int PTRFASTCALL
1274: unknown_isNmstrt(const ENCODING *enc, const char *p)
1275: {
1276: const struct unknown_encoding *uenc = AS_UNKNOWN_ENCODING(enc);
1277: int c = uenc->convert(uenc->userData, p);
1278: if (c & ~0xFFFF)
1279: return 0;
1280: return UCS2_GET_NAMING(nmstrtPages, c >> 8, c & 0xFF);
1281: }
1282:
1283: static int PTRFASTCALL
1284: unknown_isInvalid(const ENCODING *enc, const char *p)
1285: {
1286: const struct unknown_encoding *uenc = AS_UNKNOWN_ENCODING(enc);
1287: int c = uenc->convert(uenc->userData, p);
1288: return (c & ~0xFFFF) || checkCharRefNumber(c) < 0;
1289: }
1290:
1291: static void PTRCALL
1292: unknown_toUtf8(const ENCODING *enc,
1293: const char **fromP, const char *fromLim,
1294: char **toP, const char *toLim)
1295: {
1296: const struct unknown_encoding *uenc = AS_UNKNOWN_ENCODING(enc);
1297: char buf[XML_UTF8_ENCODE_MAX];
1298: for (;;) {
1299: const char *utf8;
1300: int n;
1301: if (*fromP == fromLim)
1302: break;
1303: utf8 = uenc->utf8[(unsigned char)**fromP];
1304: n = *utf8++;
1305: if (n == 0) {
1306: int c = uenc->convert(uenc->userData, *fromP);
1307: n = XmlUtf8Encode(c, buf);
1308: if (n > toLim - *toP)
1309: break;
1310: utf8 = buf;
1311: *fromP += (AS_NORMAL_ENCODING(enc)->type[(unsigned char)**fromP]
1312: - (BT_LEAD2 - 2));
1313: }
1314: else {
1315: if (n > toLim - *toP)
1316: break;
1317: (*fromP)++;
1318: }
1319: do {
1320: *(*toP)++ = *utf8++;
1321: } while (--n != 0);
1322: }
1323: }
1324:
1325: static void PTRCALL
1326: unknown_toUtf16(const ENCODING *enc,
1327: const char **fromP, const char *fromLim,
1328: unsigned short **toP, const unsigned short *toLim)
1329: {
1330: const struct unknown_encoding *uenc = AS_UNKNOWN_ENCODING(enc);
1331: while (*fromP != fromLim && *toP != toLim) {
1332: unsigned short c = uenc->utf16[(unsigned char)**fromP];
1333: if (c == 0) {
1334: c = (unsigned short)
1335: uenc->convert(uenc->userData, *fromP);
1336: *fromP += (AS_NORMAL_ENCODING(enc)->type[(unsigned char)**fromP]
1337: - (BT_LEAD2 - 2));
1338: }
1339: else
1340: (*fromP)++;
1341: *(*toP)++ = c;
1342: }
1343: }
1344:
1345: ENCODING *
1346: XmlInitUnknownEncoding(void *mem,
1347: int *table,
1348: CONVERTER convert,
1349: void *userData)
1350: {
1351: int i;
1352: struct unknown_encoding *e = (struct unknown_encoding *)mem;
1353: for (i = 0; i < (int)sizeof(struct normal_encoding); i++)
1354: ((char *)mem)[i] = ((char *)&latin1_encoding)[i];
1355: for (i = 0; i < 128; i++)
1356: if (latin1_encoding.type[i] != BT_OTHER
1357: && latin1_encoding.type[i] != BT_NONXML
1358: && table[i] != i)
1359: return 0;
1360: for (i = 0; i < 256; i++) {
1361: int c = table[i];
1362: if (c == -1) {
1363: e->normal.type[i] = BT_MALFORM;
1364: /* This shouldn't really get used. */
1365: e->utf16[i] = 0xFFFF;
1366: e->utf8[i][0] = 1;
1367: e->utf8[i][1] = 0;
1368: }
1369: else if (c < 0) {
1370: if (c < -4)
1371: return 0;
1372: e->normal.type[i] = (unsigned char)(BT_LEAD2 - (c + 2));
1373: e->utf8[i][0] = 0;
1374: e->utf16[i] = 0;
1375: }
1376: else if (c < 0x80) {
1377: if (latin1_encoding.type[c] != BT_OTHER
1378: && latin1_encoding.type[c] != BT_NONXML
1379: && c != i)
1380: return 0;
1381: e->normal.type[i] = latin1_encoding.type[c];
1382: e->utf8[i][0] = 1;
1383: e->utf8[i][1] = (char)c;
1384: e->utf16[i] = (unsigned short)(c == 0 ? 0xFFFF : c);
1385: }
1386: else if (checkCharRefNumber(c) < 0) {
1387: e->normal.type[i] = BT_NONXML;
1388: /* This shouldn't really get used. */
1389: e->utf16[i] = 0xFFFF;
1390: e->utf8[i][0] = 1;
1391: e->utf8[i][1] = 0;
1392: }
1393: else {
1394: if (c > 0xFFFF)
1395: return 0;
1396: if (UCS2_GET_NAMING(nmstrtPages, c >> 8, c & 0xff))
1397: e->normal.type[i] = BT_NMSTRT;
1398: else if (UCS2_GET_NAMING(namePages, c >> 8, c & 0xff))
1399: e->normal.type[i] = BT_NAME;
1400: else
1401: e->normal.type[i] = BT_OTHER;
1402: e->utf8[i][0] = (char)XmlUtf8Encode(c, e->utf8[i] + 1);
1403: e->utf16[i] = (unsigned short)c;
1404: }
1405: }
1406: e->userData = userData;
1407: e->convert = convert;
1408: if (convert) {
1409: e->normal.isName2 = unknown_isName;
1410: e->normal.isName3 = unknown_isName;
1411: e->normal.isName4 = unknown_isName;
1412: e->normal.isNmstrt2 = unknown_isNmstrt;
1413: e->normal.isNmstrt3 = unknown_isNmstrt;
1414: e->normal.isNmstrt4 = unknown_isNmstrt;
1415: e->normal.isInvalid2 = unknown_isInvalid;
1416: e->normal.isInvalid3 = unknown_isInvalid;
1417: e->normal.isInvalid4 = unknown_isInvalid;
1418: }
1419: e->normal.enc.utf8Convert = unknown_toUtf8;
1420: e->normal.enc.utf16Convert = unknown_toUtf16;
1421: return &(e->normal.enc);
1422: }
1423:
1424: /* If this enumeration is changed, getEncodingIndex and encodings
1425: must also be changed. */
1426: enum {
1427: UNKNOWN_ENC = -1,
1428: ISO_8859_1_ENC = 0,
1429: US_ASCII_ENC,
1430: UTF_8_ENC,
1431: UTF_16_ENC,
1432: UTF_16BE_ENC,
1433: UTF_16LE_ENC,
1434: /* must match encodingNames up to here */
1435: NO_ENC
1436: };
1437:
1438: static const char KW_ISO_8859_1[] = {
1439: ASCII_I, ASCII_S, ASCII_O, ASCII_MINUS, ASCII_8, ASCII_8, ASCII_5, ASCII_9,
1440: ASCII_MINUS, ASCII_1, '\0'
1441: };
1442: static const char KW_US_ASCII[] = {
1443: ASCII_U, ASCII_S, ASCII_MINUS, ASCII_A, ASCII_S, ASCII_C, ASCII_I, ASCII_I,
1444: '\0'
1445: };
1446: static const char KW_UTF_8[] = {
1447: ASCII_U, ASCII_T, ASCII_F, ASCII_MINUS, ASCII_8, '\0'
1448: };
1449: static const char KW_UTF_16[] = {
1450: ASCII_U, ASCII_T, ASCII_F, ASCII_MINUS, ASCII_1, ASCII_6, '\0'
1451: };
1452: static const char KW_UTF_16BE[] = {
1453: ASCII_U, ASCII_T, ASCII_F, ASCII_MINUS, ASCII_1, ASCII_6, ASCII_B, ASCII_E,
1454: '\0'
1455: };
1456: static const char KW_UTF_16LE[] = {
1457: ASCII_U, ASCII_T, ASCII_F, ASCII_MINUS, ASCII_1, ASCII_6, ASCII_L, ASCII_E,
1458: '\0'
1459: };
1460:
1461: static int FASTCALL
1462: getEncodingIndex(const char *name)
1463: {
1464: static const char * const encodingNames[] = {
1465: KW_ISO_8859_1,
1466: KW_US_ASCII,
1467: KW_UTF_8,
1468: KW_UTF_16,
1469: KW_UTF_16BE,
1470: KW_UTF_16LE,
1471: };
1472: int i;
1473: if (name == NULL)
1474: return NO_ENC;
1475: for (i = 0; i < (int)(sizeof(encodingNames)/sizeof(encodingNames[0])); i++)
1476: if (streqci(name, encodingNames[i]))
1477: return i;
1478: return UNKNOWN_ENC;
1479: }
1480:
1481: /* For binary compatibility, we store the index of the encoding
1482: specified at initialization in the isUtf16 member.
1483: */
1484:
1485: #define INIT_ENC_INDEX(enc) ((int)(enc)->initEnc.isUtf16)
1486: #define SET_INIT_ENC_INDEX(enc, i) ((enc)->initEnc.isUtf16 = (char)i)
1487:
1488: /* This is what detects the encoding. encodingTable maps from
1489: encoding indices to encodings; INIT_ENC_INDEX(enc) is the index of
1490: the external (protocol) specified encoding; state is
1491: XML_CONTENT_STATE if we're parsing an external text entity, and
1492: XML_PROLOG_STATE otherwise.
1493: */
1494:
1495:
1496: static int
1497: initScan(const ENCODING * const *encodingTable,
1498: const INIT_ENCODING *enc,
1499: int state,
1500: const char *ptr,
1501: const char *end,
1502: const char **nextTokPtr)
1503: {
1504: const ENCODING **encPtr;
1505:
1506: if (ptr == end)
1507: return XML_TOK_NONE;
1508: encPtr = enc->encPtr;
1509: if (ptr + 1 == end) {
1510: /* only a single byte available for auto-detection */
1511: #ifndef XML_DTD /* FIXME */
1512: /* a well-formed document entity must have more than one byte */
1513: if (state != XML_CONTENT_STATE)
1514: return XML_TOK_PARTIAL;
1515: #endif
1516: /* so we're parsing an external text entity... */
1517: /* if UTF-16 was externally specified, then we need at least 2 bytes */
1518: switch (INIT_ENC_INDEX(enc)) {
1519: case UTF_16_ENC:
1520: case UTF_16LE_ENC:
1521: case UTF_16BE_ENC:
1522: return XML_TOK_PARTIAL;
1523: }
1524: switch ((unsigned char)*ptr) {
1525: case 0xFE:
1526: case 0xFF:
1527: case 0xEF: /* possibly first byte of UTF-8 BOM */
1528: if (INIT_ENC_INDEX(enc) == ISO_8859_1_ENC
1529: && state == XML_CONTENT_STATE)
1530: break;
1531: /* fall through */
1532: case 0x00:
1533: case 0x3C:
1534: return XML_TOK_PARTIAL;
1535: }
1536: }
1537: else {
1538: switch (((unsigned char)ptr[0] << 8) | (unsigned char)ptr[1]) {
1539: case 0xFEFF:
1540: if (INIT_ENC_INDEX(enc) == ISO_8859_1_ENC
1541: && state == XML_CONTENT_STATE)
1542: break;
1543: *nextTokPtr = ptr + 2;
1544: *encPtr = encodingTable[UTF_16BE_ENC];
1545: return XML_TOK_BOM;
1546: /* 00 3C is handled in the default case */
1547: case 0x3C00:
1548: if ((INIT_ENC_INDEX(enc) == UTF_16BE_ENC
1549: || INIT_ENC_INDEX(enc) == UTF_16_ENC)
1550: && state == XML_CONTENT_STATE)
1551: break;
1552: *encPtr = encodingTable[UTF_16LE_ENC];
1553: return XmlTok(*encPtr, state, ptr, end, nextTokPtr);
1554: case 0xFFFE:
1555: if (INIT_ENC_INDEX(enc) == ISO_8859_1_ENC
1556: && state == XML_CONTENT_STATE)
1557: break;
1558: *nextTokPtr = ptr + 2;
1559: *encPtr = encodingTable[UTF_16LE_ENC];
1560: return XML_TOK_BOM;
1561: case 0xEFBB:
1562: /* Maybe a UTF-8 BOM (EF BB BF) */
1563: /* If there's an explicitly specified (external) encoding
1564: of ISO-8859-1 or some flavour of UTF-16
1565: and this is an external text entity,
1566: don't look for the BOM,
1567: because it might be a legal data.
1568: */
1569: if (state == XML_CONTENT_STATE) {
1570: int e = INIT_ENC_INDEX(enc);
1571: if (e == ISO_8859_1_ENC || e == UTF_16BE_ENC
1572: || e == UTF_16LE_ENC || e == UTF_16_ENC)
1573: break;
1574: }
1575: if (ptr + 2 == end)
1576: return XML_TOK_PARTIAL;
1577: if ((unsigned char)ptr[2] == 0xBF) {
1578: *nextTokPtr = ptr + 3;
1579: *encPtr = encodingTable[UTF_8_ENC];
1580: return XML_TOK_BOM;
1581: }
1582: break;
1583: default:
1584: if (ptr[0] == '\0') {
1585: /* 0 isn't a legal data character. Furthermore a document
1586: entity can only start with ASCII characters. So the only
1587: way this can fail to be big-endian UTF-16 if it it's an
1588: external parsed general entity that's labelled as
1589: UTF-16LE.
1590: */
1591: if (state == XML_CONTENT_STATE && INIT_ENC_INDEX(enc) == UTF_16LE_ENC)
1592: break;
1593: *encPtr = encodingTable[UTF_16BE_ENC];
1594: return XmlTok(*encPtr, state, ptr, end, nextTokPtr);
1595: }
1596: else if (ptr[1] == '\0') {
1597: /* We could recover here in the case:
1598: - parsing an external entity
1599: - second byte is 0
1600: - no externally specified encoding
1601: - no encoding declaration
1602: by assuming UTF-16LE. But we don't, because this would mean when
1603: presented just with a single byte, we couldn't reliably determine
1604: whether we needed further bytes.
1605: */
1606: if (state == XML_CONTENT_STATE)
1607: break;
1608: *encPtr = encodingTable[UTF_16LE_ENC];
1609: return XmlTok(*encPtr, state, ptr, end, nextTokPtr);
1610: }
1611: break;
1612: }
1613: }
1614: *encPtr = encodingTable[INIT_ENC_INDEX(enc)];
1615: return XmlTok(*encPtr, state, ptr, end, nextTokPtr);
1616: }
1617:
1618:
1619: #define NS(x) x
1620: #define ns(x) x
1621: #define XML_TOK_NS_C
1622: #include "xmltok_ns.c"
1623: #undef XML_TOK_NS_C
1624: #undef NS
1625: #undef ns
1626:
1627: #ifdef XML_NS
1628:
1629: #define NS(x) x ## NS
1630: #define ns(x) x ## _ns
1631:
1632: #define XML_TOK_NS_C
1633: #include "xmltok_ns.c"
1634: #undef XML_TOK_NS_C
1635:
1636: #undef NS
1637: #undef ns
1638:
1639: ENCODING *
1640: XmlInitUnknownEncodingNS(void *mem,
1641: int *table,
1642: CONVERTER convert,
1643: void *userData)
1644: {
1645: ENCODING *enc = XmlInitUnknownEncoding(mem, table, convert, userData);
1646: if (enc)
1647: ((struct normal_encoding *)enc)->type[ASCII_COLON] = BT_COLON;
1648: return enc;
1649: }
1650:
1651: #endif /* XML_NS */
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/cvsweb/back.gif){kind=icon}
Return to xmltok.c CVS log ![[TXT]](/icons/cvsweb/text.gif){kind=icon}
![[DIR]](/icons/cvsweb/dir.gif){kind=icon}
Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / expat / lib