entities.c@ 103285

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libs/{curl,libxml2}: OSE export fixes, bugref:8515
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1	/*
2	* entities.c : implementation for the XML entities handling
3	*
4	* See Copyright for the status of this software.
5	*
6	* [email protected]
7	*/
8
9	/* To avoid EBCDIC trouble when parsing on zOS */
10	#if defined(__MVS__)
11	#pragma convert("ISO8859-1")
12	#endif
13
14	#define IN_LIBXML
15	#include "libxml.h"
16
17	#include <string.h>
18	#ifdef HAVE_STDLIB_H
19	#include <stdlib.h>
20	#endif
21	#include <libxml/xmlmemory.h>
22	#include <libxml/hash.h>
23	#include <libxml/entities.h>
24	#include <libxml/parser.h>
25	#include <libxml/parserInternals.h>
26	#include <libxml/xmlerror.h>
27	#include <libxml/globals.h>
28	#include <libxml/dict.h>
29
30	#include "save.h"
31
32	/*
33	* The XML predefined entities.
34	*/
35
36	static xmlEntity xmlEntityLt = {
37	NULL, XML_ENTITY_DECL, BAD_CAST "lt",
38	NULL, NULL, NULL, NULL, NULL, NULL,
39	BAD_CAST "<", BAD_CAST "<", 1,
40	XML_INTERNAL_PREDEFINED_ENTITY,
41	NULL, NULL, NULL, NULL, 0, 1
42	};
43	static xmlEntity xmlEntityGt = {
44	NULL, XML_ENTITY_DECL, BAD_CAST "gt",
45	NULL, NULL, NULL, NULL, NULL, NULL,
46	BAD_CAST ">", BAD_CAST ">", 1,
47	XML_INTERNAL_PREDEFINED_ENTITY,
48	NULL, NULL, NULL, NULL, 0, 1
49	};
50	static xmlEntity xmlEntityAmp = {
51	NULL, XML_ENTITY_DECL, BAD_CAST "amp",
52	NULL, NULL, NULL, NULL, NULL, NULL,
53	BAD_CAST "&", BAD_CAST "&", 1,
54	XML_INTERNAL_PREDEFINED_ENTITY,
55	NULL, NULL, NULL, NULL, 0, 1
56	};
57	static xmlEntity xmlEntityQuot = {
58	NULL, XML_ENTITY_DECL, BAD_CAST "quot",
59	NULL, NULL, NULL, NULL, NULL, NULL,
60	BAD_CAST "\"", BAD_CAST "\"", 1,
61	XML_INTERNAL_PREDEFINED_ENTITY,
62	NULL, NULL, NULL, NULL, 0, 1
63	};
64	static xmlEntity xmlEntityApos = {
65	NULL, XML_ENTITY_DECL, BAD_CAST "apos",
66	NULL, NULL, NULL, NULL, NULL, NULL,
67	BAD_CAST "'", BAD_CAST "'", 1,
68	XML_INTERNAL_PREDEFINED_ENTITY,
69	NULL, NULL, NULL, NULL, 0, 1
70	};
71
72	/**
73	* xmlEntitiesErrMemory:
74	* @extra: extra information
75	*
76	* Handle an out of memory condition
77	*/
78	static void
79	xmlEntitiesErrMemory(const char *extra)
80	{
81	__xmlSimpleError(XML_FROM_TREE, XML_ERR_NO_MEMORY, NULL, NULL, extra);
82	}
83
84	/**
85	* xmlEntitiesErr:
86	* @code: the error code
87	* @msg: the message
88	*
89	* Handle an out of memory condition
90	*/
91	static void LIBXML_ATTR_FORMAT(2,0)
92	xmlEntitiesErr(xmlParserErrors code, const char *msg)
93	{
94	__xmlSimpleError(XML_FROM_TREE, code, NULL, msg, NULL);
95	}
96
97	/*
98	* xmlFreeEntity : clean-up an entity record.
99	*/
100	static void
101	xmlFreeEntity(xmlEntityPtr entity)
102	{
103	xmlDictPtr dict = NULL;
104
105	if (entity == NULL)
106	return;
107
108	if (entity->doc != NULL)
109	dict = entity->doc->dict;
110
111
112	if ((entity->children) && (entity->owner == 1) &&
113	(entity == (xmlEntityPtr) entity->children->parent))
114	xmlFreeNodeList(entity->children);
115	if (dict != NULL) {
116	if ((entity->name != NULL) && (!xmlDictOwns(dict, entity->name)))
117	xmlFree((char *) entity->name);
118	if ((entity->ExternalID != NULL) &&
119	(!xmlDictOwns(dict, entity->ExternalID)))
120	xmlFree((char *) entity->ExternalID);
121	if ((entity->SystemID != NULL) &&
122	(!xmlDictOwns(dict, entity->SystemID)))
123	xmlFree((char *) entity->SystemID);
124	if ((entity->URI != NULL) && (!xmlDictOwns(dict, entity->URI)))
125	xmlFree((char *) entity->URI);
126	if ((entity->content != NULL)
127	&& (!xmlDictOwns(dict, entity->content)))
128	xmlFree((char *) entity->content);
129	if ((entity->orig != NULL) && (!xmlDictOwns(dict, entity->orig)))
130	xmlFree((char *) entity->orig);
131	} else {
132	if (entity->name != NULL)
133	xmlFree((char *) entity->name);
134	if (entity->ExternalID != NULL)
135	xmlFree((char *) entity->ExternalID);
136	if (entity->SystemID != NULL)
137	xmlFree((char *) entity->SystemID);
138	if (entity->URI != NULL)
139	xmlFree((char *) entity->URI);
140	if (entity->content != NULL)
141	xmlFree((char *) entity->content);
142	if (entity->orig != NULL)
143	xmlFree((char *) entity->orig);
144	}
145	xmlFree(entity);
146	}
147
148	/*
149	* xmlCreateEntity:
150	*
151	* internal routine doing the entity node structures allocations
152	*/
153	static xmlEntityPtr
154	xmlCreateEntity(xmlDictPtr dict, const xmlChar *name, int type,
155	const xmlChar ExternalID, const xmlChar SystemID,
156	const xmlChar *content) {
157	xmlEntityPtr ret;
158
159	ret = (xmlEntityPtr) xmlMalloc(sizeof(xmlEntity));
160	if (ret == NULL) {
161	xmlEntitiesErrMemory("xmlCreateEntity: malloc failed");
162	return(NULL);
163	}
164	memset(ret, 0, sizeof(xmlEntity));
165	ret->type = XML_ENTITY_DECL;
166	ret->checked = 0;
167
168	/*
169	* fill the structure.
170	*/
171	ret->etype = (xmlEntityType) type;
172	if (dict == NULL) {
173	ret->name = xmlStrdup(name);
174	if (ExternalID != NULL)
175	ret->ExternalID = xmlStrdup(ExternalID);
176	if (SystemID != NULL)
177	ret->SystemID = xmlStrdup(SystemID);
178	} else {
179	ret->name = xmlDictLookup(dict, name, -1);
180	if (ExternalID != NULL)
181	ret->ExternalID = xmlDictLookup(dict, ExternalID, -1);
182	if (SystemID != NULL)
183	ret->SystemID = xmlDictLookup(dict, SystemID, -1);
184	}
185	if (content != NULL) {
186	ret->length = xmlStrlen(content);
187	if ((dict != NULL) && (ret->length < 5))
188	ret->content = (xmlChar *)
189	xmlDictLookup(dict, content, ret->length);
190	else
191	ret->content = xmlStrndup(content, ret->length);
192	} else {
193	ret->length = 0;
194	ret->content = NULL;
195	}
196	ret->URI = NULL; /* to be computed by the layer knowing
197	the defining entity */
198	ret->orig = NULL;
199	ret->owner = 0;
200
201	return(ret);
202	}
203
204	/*
205	* xmlAddEntity : register a new entity for an entities table.
206	*/
207	static xmlEntityPtr
208	xmlAddEntity(xmlDtdPtr dtd, const xmlChar *name, int type,
209	const xmlChar ExternalID, const xmlChar SystemID,
210	const xmlChar *content) {
211	xmlDictPtr dict = NULL;
212	xmlEntitiesTablePtr table = NULL;
213	xmlEntityPtr ret, predef;
214
215	if (name == NULL)
216	return(NULL);
217	if (dtd == NULL)
218	return(NULL);
219	if (dtd->doc != NULL)
220	dict = dtd->doc->dict;
221
222	switch (type) {
223	case XML_INTERNAL_GENERAL_ENTITY:
224	case XML_EXTERNAL_GENERAL_PARSED_ENTITY:
225	case XML_EXTERNAL_GENERAL_UNPARSED_ENTITY:
226	predef = xmlGetPredefinedEntity(name);
227	if (predef != NULL) {
228	int valid = 0;
229
230	/* 4.6 Predefined Entities */
231	if ((type == XML_INTERNAL_GENERAL_ENTITY) &&
232	(content != NULL)) {
233	int c = predef->content[0];
234
235	if (((content[0] == c) && (content[1] == 0)) &&
236	((c == '>') \|\| (c == '\'') \|\| (c == '"'))) {
237	valid = 1;
238	} else if ((content[0] == '&') && (content[1] == '#')) {
239	if (content[2] == 'x') {
240	xmlChar *hex = BAD_CAST "0123456789ABCDEF";
241	xmlChar ref[] = "00;";
242
243	ref[0] = hex[c / 16 % 16];
244	ref[1] = hex[c % 16];
245	if (xmlStrcasecmp(&content[3], ref) == 0)
246	valid = 1;
247	} else {
248	xmlChar ref[] = "00;";
249
250	ref[0] = '0' + c / 10 % 10;
251	ref[1] = '0' + c % 10;
252	if (xmlStrEqual(&content[2], ref))
253	valid = 1;
254	}
255	}
256	}
257	if (!valid) {
258	xmlEntitiesErr(XML_ERR_ENTITY_PROCESSING,
259	"xmlAddEntity: invalid redeclaration of predefined"
260	" entity");
261	return(NULL);
262	}
263	}
264	if (dtd->entities == NULL)
265	dtd->entities = xmlHashCreateDict(0, dict);
266	table = dtd->entities;
267	break;
268	case XML_INTERNAL_PARAMETER_ENTITY:
269	case XML_EXTERNAL_PARAMETER_ENTITY:
270	if (dtd->pentities == NULL)
271	dtd->pentities = xmlHashCreateDict(0, dict);
272	table = dtd->pentities;
273	break;
274	case XML_INTERNAL_PREDEFINED_ENTITY:
275	return(NULL);
276	}
277	if (table == NULL)
278	return(NULL);
279	ret = xmlCreateEntity(dict, name, type, ExternalID, SystemID, content);
280	if (ret == NULL)
281	return(NULL);
282	ret->doc = dtd->doc;
283
284	if (xmlHashAddEntry(table, name, ret)) {
285	/*
286	* entity was already defined at another level.
287	*/
288	xmlFreeEntity(ret);
289	return(NULL);
290	}
291	return(ret);
292	}
293
294	/**
295	* xmlGetPredefinedEntity:
296	* @name: the entity name
297	*
298	* Check whether this name is an predefined entity.
299	*
300	* Returns NULL if not, otherwise the entity
301	*/
302	xmlEntityPtr
303	xmlGetPredefinedEntity(const xmlChar *name) {
304	if (name == NULL) return(NULL);
305	switch (name[0]) {
306	case 'l':
307	if (xmlStrEqual(name, BAD_CAST "lt"))
308	return(&xmlEntityLt);
309	break;
310	case 'g':
311	if (xmlStrEqual(name, BAD_CAST "gt"))
312	return(&xmlEntityGt);
313	break;
314	case 'a':
315	if (xmlStrEqual(name, BAD_CAST "amp"))
316	return(&xmlEntityAmp);
317	if (xmlStrEqual(name, BAD_CAST "apos"))
318	return(&xmlEntityApos);
319	break;
320	case 'q':
321	if (xmlStrEqual(name, BAD_CAST "quot"))
322	return(&xmlEntityQuot);
323	break;
324	default:
325	break;
326	}
327	return(NULL);
328	}
329
330	/**
331	* xmlAddDtdEntity:
332	* @doc: the document
333	* @name: the entity name
334	* @type: the entity type XML_xxx_yyy_ENTITY
335	* @ExternalID: the entity external ID if available
336	* @SystemID: the entity system ID if available
337	* @content: the entity content
338	*
339	* Register a new entity for this document DTD external subset.
340	*
341	* Returns a pointer to the entity or NULL in case of error
342	*/
343	xmlEntityPtr
344	xmlAddDtdEntity(xmlDocPtr doc, const xmlChar *name, int type,
345	const xmlChar ExternalID, const xmlChar SystemID,
346	const xmlChar *content) {
347	xmlEntityPtr ret;
348	xmlDtdPtr dtd;
349
350	if (doc == NULL) {
351	xmlEntitiesErr(XML_DTD_NO_DOC,
352	"xmlAddDtdEntity: document is NULL");
353	return(NULL);
354	}
355	if (doc->extSubset == NULL) {
356	xmlEntitiesErr(XML_DTD_NO_DTD,
357	"xmlAddDtdEntity: document without external subset");
358	return(NULL);
359	}
360	dtd = doc->extSubset;
361	ret = xmlAddEntity(dtd, name, type, ExternalID, SystemID, content);
362	if (ret == NULL) return(NULL);
363
364	/*
365	* Link it to the DTD
366	*/
367	ret->parent = dtd;
368	ret->doc = dtd->doc;
369	if (dtd->last == NULL) {
370	dtd->children = dtd->last = (xmlNodePtr) ret;
371	} else {
372	dtd->last->next = (xmlNodePtr) ret;
373	ret->prev = dtd->last;
374	dtd->last = (xmlNodePtr) ret;
375	}
376	return(ret);
377	}
378
379	/**
380	* xmlAddDocEntity:
381	* @doc: the document
382	* @name: the entity name
383	* @type: the entity type XML_xxx_yyy_ENTITY
384	* @ExternalID: the entity external ID if available
385	* @SystemID: the entity system ID if available
386	* @content: the entity content
387	*
388	* Register a new entity for this document.
389	*
390	* Returns a pointer to the entity or NULL in case of error
391	*/
392	xmlEntityPtr
393	xmlAddDocEntity(xmlDocPtr doc, const xmlChar *name, int type,
394	const xmlChar ExternalID, const xmlChar SystemID,
395	const xmlChar *content) {
396	xmlEntityPtr ret;
397	xmlDtdPtr dtd;
398
399	if (doc == NULL) {
400	xmlEntitiesErr(XML_DTD_NO_DOC,
401	"xmlAddDocEntity: document is NULL");
402	return(NULL);
403	}
404	if (doc->intSubset == NULL) {
405	xmlEntitiesErr(XML_DTD_NO_DTD,
406	"xmlAddDocEntity: document without internal subset");
407	return(NULL);
408	}
409	dtd = doc->intSubset;
410	ret = xmlAddEntity(dtd, name, type, ExternalID, SystemID, content);
411	if (ret == NULL) return(NULL);
412
413	/*
414	* Link it to the DTD
415	*/
416	ret->parent = dtd;
417	ret->doc = dtd->doc;
418	if (dtd->last == NULL) {
419	dtd->children = dtd->last = (xmlNodePtr) ret;
420	} else {
421	dtd->last->next = (xmlNodePtr) ret;
422	ret->prev = dtd->last;
423	dtd->last = (xmlNodePtr) ret;
424	}
425	return(ret);
426	}
427
428	/**
429	* xmlNewEntity:
430	* @doc: the document
431	* @name: the entity name
432	* @type: the entity type XML_xxx_yyy_ENTITY
433	* @ExternalID: the entity external ID if available
434	* @SystemID: the entity system ID if available
435	* @content: the entity content
436	*
437	* Create a new entity, this differs from xmlAddDocEntity() that if
438	* the document is NULL or has no internal subset defined, then an
439	* unlinked entity structure will be returned, it is then the responsibility
440	* of the caller to link it to the document later or free it when not needed
441	* anymore.
442	*
443	* Returns a pointer to the entity or NULL in case of error
444	*/
445	xmlEntityPtr
446	xmlNewEntity(xmlDocPtr doc, const xmlChar *name, int type,
447	const xmlChar ExternalID, const xmlChar SystemID,
448	const xmlChar *content) {
449	xmlEntityPtr ret;
450	xmlDictPtr dict;
451
452	if ((doc != NULL) && (doc->intSubset != NULL)) {
453	return(xmlAddDocEntity(doc, name, type, ExternalID, SystemID, content));
454	}
455	if (doc != NULL)
456	dict = doc->dict;
457	else
458	dict = NULL;
459	ret = xmlCreateEntity(dict, name, type, ExternalID, SystemID, content);
460	if (ret == NULL)
461	return(NULL);
462	ret->doc = doc;
463	return(ret);
464	}
465
466	/**
467	* xmlGetEntityFromTable:
468	* @table: an entity table
469	* @name: the entity name
470	* @parameter: look for parameter entities
471	*
472	* Do an entity lookup in the table.
473	* returns the corresponding parameter entity, if found.
474	*
475	* Returns A pointer to the entity structure or NULL if not found.
476	*/
477	static xmlEntityPtr
478	xmlGetEntityFromTable(xmlEntitiesTablePtr table, const xmlChar *name) {
479	return((xmlEntityPtr) xmlHashLookup(table, name));
480	}
481
482	/**
483	* xmlGetParameterEntity:
484	* @doc: the document referencing the entity
485	* @name: the entity name
486	*
487	* Do an entity lookup in the internal and external subsets and
488	* returns the corresponding parameter entity, if found.
489	*
490	* Returns A pointer to the entity structure or NULL if not found.
491	*/
492	xmlEntityPtr
493	xmlGetParameterEntity(xmlDocPtr doc, const xmlChar *name) {
494	xmlEntitiesTablePtr table;
495	xmlEntityPtr ret;
496
497	if (doc == NULL)
498	return(NULL);
499	if ((doc->intSubset != NULL) && (doc->intSubset->pentities != NULL)) {
500	table = (xmlEntitiesTablePtr) doc->intSubset->pentities;
501	ret = xmlGetEntityFromTable(table, name);
502	if (ret != NULL)
503	return(ret);
504	}
505	if ((doc->extSubset != NULL) && (doc->extSubset->pentities != NULL)) {
506	table = (xmlEntitiesTablePtr) doc->extSubset->pentities;
507	return(xmlGetEntityFromTable(table, name));
508	}
509	return(NULL);
510	}
511
512	/**
513	* xmlGetDtdEntity:
514	* @doc: the document referencing the entity
515	* @name: the entity name
516	*
517	* Do an entity lookup in the DTD entity hash table and
518	* returns the corresponding entity, if found.
519	* Note: the first argument is the document node, not the DTD node.
520	*
521	* Returns A pointer to the entity structure or NULL if not found.
522	*/
523	xmlEntityPtr
524	xmlGetDtdEntity(xmlDocPtr doc, const xmlChar *name) {
525	xmlEntitiesTablePtr table;
526
527	if (doc == NULL)
528	return(NULL);
529	if ((doc->extSubset != NULL) && (doc->extSubset->entities != NULL)) {
530	table = (xmlEntitiesTablePtr) doc->extSubset->entities;
531	return(xmlGetEntityFromTable(table, name));
532	}
533	return(NULL);
534	}
535
536	/**
537	* xmlGetDocEntity:
538	* @doc: the document referencing the entity
539	* @name: the entity name
540	*
541	* Do an entity lookup in the document entity hash table and
542	* returns the corresponding entity, otherwise a lookup is done
543	* in the predefined entities too.
544	*
545	* Returns A pointer to the entity structure or NULL if not found.
546	*/
547	xmlEntityPtr
548	xmlGetDocEntity(const xmlDoc doc, const xmlChar name) {
549	xmlEntityPtr cur;
550	xmlEntitiesTablePtr table;
551
552	if (doc != NULL) {
553	if ((doc->intSubset != NULL) && (doc->intSubset->entities != NULL)) {
554	table = (xmlEntitiesTablePtr) doc->intSubset->entities;
555	cur = xmlGetEntityFromTable(table, name);
556	if (cur != NULL)
557	return(cur);
558	}
559	if (doc->standalone != 1) {
560	if ((doc->extSubset != NULL) &&
561	(doc->extSubset->entities != NULL)) {
562	table = (xmlEntitiesTablePtr) doc->extSubset->entities;
563	cur = xmlGetEntityFromTable(table, name);
564	if (cur != NULL)
565	return(cur);
566	}
567	}
568	}
569	return(xmlGetPredefinedEntity(name));
570	}
571
572	/*
573	* Macro used to grow the current buffer.
574	*/
575	#define growBufferReentrant() { \
576	xmlChar *tmp; \
577	size_t new_size = buffer_size * 2; \
578	if (new_size < buffer_size) goto mem_error; \
579	tmp = (xmlChar *) xmlRealloc(buffer, new_size); \
580	if (tmp == NULL) goto mem_error; \
581	buffer = tmp; \
582	buffer_size = new_size; \
583	}
584
585	/**
586	* xmlEncodeEntitiesInternal:
587	* @doc: the document containing the string
588	* @input: A string to convert to XML.
589	* @attr: are we handling an attribute value
590	*
591	* Do a global encoding of a string, replacing the predefined entities
592	* and non ASCII values with their entities and CharRef counterparts.
593	* Contrary to xmlEncodeEntities, this routine is reentrant, and result
594	* must be deallocated.
595	*
596	* Returns A newly allocated string with the substitution done.
597	*/
598	static xmlChar *
599	xmlEncodeEntitiesInternal(xmlDocPtr doc, const xmlChar *input, int attr) {
600	const xmlChar *cur = input;
601	xmlChar *buffer = NULL;
602	xmlChar *out = NULL;
603	size_t buffer_size = 0;
604	int html = 0;
605
606	if (input == NULL) return(NULL);
607	if (doc != NULL)
608	html = (doc->type == XML_HTML_DOCUMENT_NODE);
609
610	/*
611	* allocate an translation buffer.
612	*/
613	buffer_size = 1000;
614	buffer = (xmlChar ) xmlMalloc(buffer_size sizeof(xmlChar));
615	if (buffer == NULL) {
616	xmlEntitiesErrMemory("xmlEncodeEntities: malloc failed");
617	return(NULL);
618	}
619	out = buffer;
620
621	while (*cur != '\0') {
622	size_t indx = out - buffer;
623	if (indx + 100 > buffer_size) {
624
625	growBufferReentrant();
626	out = &buffer[indx];
627	}
628
629	/*
630	* By default one have to encode at least '<', '>', '"' and '&' !
631	*/
632	if (*cur == '<') {
633	const xmlChar *end;
634
635	/*
636	* Special handling of server side include in HTML attributes
637	*/
638	if (html && attr &&
639	(cur[1] == '!') && (cur[2] == '-') && (cur[3] == '-') &&
640	((end = xmlStrstr(cur, BAD_CAST "-->")) != NULL)) {
641	while (cur != end) {
642	out++ = cur++;
643	indx = out - buffer;
644	if (indx + 100 > buffer_size) {
645	growBufferReentrant();
646	out = &buffer[indx];
647	}
648	}
649	out++ = cur++;
650	out++ = cur++;
651	out++ = cur++;
652	continue;
653	}
654	*out++ = '&';
655	*out++ = 'l';
656	*out++ = 't';
657	*out++ = ';';
658	} else if (*cur == '>') {
659	*out++ = '&';
660	*out++ = 'g';
661	*out++ = 't';
662	*out++ = ';';
663	} else if (*cur == '&') {
664	/*
665	* Special handling of &{...} construct from HTML 4, see
666	* http://www.w3.org/TR/html401/appendix/notes.html#h-B.7.1
667	*/
668	if (html && attr && (cur[1] == '{') &&
669	(strchr((const char *) cur, '}'))) {
670	while (*cur != '}') {
671	out++ = cur++;
672	indx = out - buffer;
673	if (indx + 100 > buffer_size) {
674	growBufferReentrant();
675	out = &buffer[indx];
676	}
677	}
678	out++ = cur++;
679	continue;
680	}
681	*out++ = '&';
682	*out++ = 'a';
683	*out++ = 'm';
684	*out++ = 'p';
685	*out++ = ';';
686	} else if (((cur >= 0x20) && (cur < 0x80)) \|\|
687	(cur == '\n') \|\| (cur == '\t') \|\| ((html) && (*cur == '\r'))) {
688	/*
689	* default case, just copy !
690	*/
691	out++ = cur;
692	} else if (*cur >= 0x80) {
693	if (((doc != NULL) && (doc->encoding != NULL)) \|\| (html)) {
694	/*
695	* Bjørn Reese <[email protected]> provided the patch
696	xmlChar xc;
697	xc = (*cur & 0x3F) << 6;
698	if (cur[1] != 0) {
699	xc += *(++cur) & 0x3F;
700	*out++ = xc;
701	} else
702	*/
703	out++ = cur;
704	} else {
705	/*
706	* We assume we have UTF-8 input.
707	* It must match either:
708	* 110xxxxx 10xxxxxx
709	* 1110xxxx 10xxxxxx 10xxxxxx
710	* 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
711	* That is:
712	* cur[0] is 11xxxxxx
713	* cur[1] is 10xxxxxx
714	* cur[2] is 10xxxxxx if cur[0] is 111xxxxx
715	* cur[3] is 10xxxxxx if cur[0] is 1111xxxx
716	* cur[0] is not 11111xxx
717	*/
718	char buf[11], *ptr;
719	int val = 0, l = 1;
720
721	if (((cur[0] & 0xC0) != 0xC0) \|\|
722	((cur[1] & 0xC0) != 0x80) \|\|
723	(((cur[0] & 0xE0) == 0xE0) && ((cur[2] & 0xC0) != 0x80)) \|\|
724	(((cur[0] & 0xF0) == 0xF0) && ((cur[3] & 0xC0) != 0x80)) \|\|
725	(((cur[0] & 0xF8) == 0xF8))) {
726	xmlEntitiesErr(XML_CHECK_NOT_UTF8,
727	"xmlEncodeEntities: input not UTF-8");
728	if (doc != NULL)
729	doc->encoding = xmlStrdup(BAD_CAST "ISO-8859-1");
730	snprintf(buf, sizeof(buf), "&#%d;", *cur);
731	buf[sizeof(buf) - 1] = 0;
732	ptr = buf;
733	while (ptr != 0) out++ = *ptr++;
734	cur++;
735	continue;
736	} else if (*cur < 0xE0) {
737	val = (cur[0]) & 0x1F;
738	val <<= 6;
739	val \|= (cur[1]) & 0x3F;
740	l = 2;
741	} else if (*cur < 0xF0) {
742	val = (cur[0]) & 0x0F;
743	val <<= 6;
744	val \|= (cur[1]) & 0x3F;
745	val <<= 6;
746	val \|= (cur[2]) & 0x3F;
747	l = 3;
748	} else if (*cur < 0xF8) {
749	val = (cur[0]) & 0x07;
750	val <<= 6;
751	val \|= (cur[1]) & 0x3F;
752	val <<= 6;
753	val \|= (cur[2]) & 0x3F;
754	val <<= 6;
755	val \|= (cur[3]) & 0x3F;
756	l = 4;
757	}
758	if ((l == 1) \|\| (!IS_CHAR(val))) {
759	xmlEntitiesErr(XML_ERR_INVALID_CHAR,
760	"xmlEncodeEntities: char out of range\n");
761	if (doc != NULL)
762	doc->encoding = xmlStrdup(BAD_CAST "ISO-8859-1");
763	snprintf(buf, sizeof(buf), "&#%d;", *cur);
764	buf[sizeof(buf) - 1] = 0;
765	ptr = buf;
766	while (ptr != 0) out++ = *ptr++;
767	cur++;
768	continue;
769	}
770	/*
771	* We could do multiple things here. Just save as a char ref
772	*/
773	snprintf(buf, sizeof(buf), "&#x%X;", val);
774	buf[sizeof(buf) - 1] = 0;
775	ptr = buf;
776	while (ptr != 0) out++ = *ptr++;
777	cur += l;
778	continue;
779	}
780	} else if (IS_BYTE_CHAR(*cur)) {
781	char buf[11], *ptr;
782
783	snprintf(buf, sizeof(buf), "&#%d;", *cur);
784	buf[sizeof(buf) - 1] = 0;
785	ptr = buf;
786	while (ptr != 0) out++ = *ptr++;
787	}
788	cur++;
789	}
790	*out = 0;
791	return(buffer);
792
793	mem_error:
794	xmlEntitiesErrMemory("xmlEncodeEntities: realloc failed");
795	xmlFree(buffer);
796	return(NULL);
797	}
798
799	/**
800	* xmlEncodeAttributeEntities:
801	* @doc: the document containing the string
802	* @input: A string to convert to XML.
803	*
804	* Do a global encoding of a string, replacing the predefined entities
805	* and non ASCII values with their entities and CharRef counterparts for
806	* attribute values.
807	*
808	* Returns A newly allocated string with the substitution done.
809	*/
810	xmlChar *
811	xmlEncodeAttributeEntities(xmlDocPtr doc, const xmlChar *input) {
812	return xmlEncodeEntitiesInternal(doc, input, 1);
813	}
814
815	/**
816	* xmlEncodeEntitiesReentrant:
817	* @doc: the document containing the string
818	* @input: A string to convert to XML.
819	*
820	* Do a global encoding of a string, replacing the predefined entities
821	* and non ASCII values with their entities and CharRef counterparts.
822	* Contrary to xmlEncodeEntities, this routine is reentrant, and result
823	* must be deallocated.
824	*
825	* Returns A newly allocated string with the substitution done.
826	*/
827	xmlChar *
828	xmlEncodeEntitiesReentrant(xmlDocPtr doc, const xmlChar *input) {
829	return xmlEncodeEntitiesInternal(doc, input, 0);
830	}
831
832	/**
833	* xmlEncodeSpecialChars:
834	* @doc: the document containing the string
835	* @input: A string to convert to XML.
836	*
837	* Do a global encoding of a string, replacing the predefined entities
838	* this routine is reentrant, and result must be deallocated.
839	*
840	* Returns A newly allocated string with the substitution done.
841	*/
842	xmlChar *
843	xmlEncodeSpecialChars(const xmlDoc doc ATTRIBUTE_UNUSED, const xmlChar input) {
844	const xmlChar *cur = input;
845	xmlChar *buffer = NULL;
846	xmlChar *out = NULL;
847	size_t buffer_size = 0;
848	if (input == NULL) return(NULL);
849
850	/*
851	* allocate an translation buffer.
852	*/
853	buffer_size = 1000;
854	buffer = (xmlChar ) xmlMalloc(buffer_size sizeof(xmlChar));
855	if (buffer == NULL) {
856	xmlEntitiesErrMemory("xmlEncodeSpecialChars: malloc failed");
857	return(NULL);
858	}
859	out = buffer;
860
861	while (*cur != '\0') {
862	size_t indx = out - buffer;
863	if (indx + 10 > buffer_size) {
864
865	growBufferReentrant();
866	out = &buffer[indx];
867	}
868
869	/*
870	* By default one have to encode at least '<', '>', '"' and '&' !
871	*/
872	if (*cur == '<') {
873	*out++ = '&';
874	*out++ = 'l';
875	*out++ = 't';
876	*out++ = ';';
877	} else if (*cur == '>') {
878	*out++ = '&';
879	*out++ = 'g';
880	*out++ = 't';
881	*out++ = ';';
882	} else if (*cur == '&') {
883	*out++ = '&';
884	*out++ = 'a';
885	*out++ = 'm';
886	*out++ = 'p';
887	*out++ = ';';
888	} else if (*cur == '"') {
889	*out++ = '&';
890	*out++ = 'q';
891	*out++ = 'u';
892	*out++ = 'o';
893	*out++ = 't';
894	*out++ = ';';
895	} else if (*cur == '\r') {
896	*out++ = '&';
897	*out++ = '#';
898	*out++ = '1';
899	*out++ = '3';
900	*out++ = ';';
901	} else {
902	/*
903	* Works because on UTF-8, all extended sequences cannot
904	* result in bytes in the ASCII range.
905	*/
906	out++ = cur;
907	}
908	cur++;
909	}
910	*out = 0;
911	return(buffer);
912
913	mem_error:
914	xmlEntitiesErrMemory("xmlEncodeSpecialChars: realloc failed");
915	xmlFree(buffer);
916	return(NULL);
917	}
918
919	/**
920	* xmlCreateEntitiesTable:
921	*
922	* create and initialize an empty entities hash table.
923	* This really doesn't make sense and should be deprecated
924	*
925	* Returns the xmlEntitiesTablePtr just created or NULL in case of error.
926	*/
927	xmlEntitiesTablePtr
928	xmlCreateEntitiesTable(void) {
929	return((xmlEntitiesTablePtr) xmlHashCreate(0));
930	}
931
932	/**
933	* xmlFreeEntityWrapper:
934	* @entity: An entity
935	* @name: its name
936	*
937	* Deallocate the memory used by an entities in the hash table.
938	*/
939	static void
940	xmlFreeEntityWrapper(void entity, const xmlChar name ATTRIBUTE_UNUSED) {
941	if (entity != NULL)
942	xmlFreeEntity((xmlEntityPtr) entity);
943	}
944
945	/**
946	* xmlFreeEntitiesTable:
947	* @table: An entity table
948	*
949	* Deallocate the memory used by an entities hash table.
950	*/
951	void
952	xmlFreeEntitiesTable(xmlEntitiesTablePtr table) {
953	xmlHashFree(table, xmlFreeEntityWrapper);
954	}
955
956	#ifdef LIBXML_TREE_ENABLED
957	/**
958	* xmlCopyEntity:
959	* @ent: An entity
960	*
961	* Build a copy of an entity
962	*
963	* Returns the new xmlEntitiesPtr or NULL in case of error.
964	*/
965	static void *
966	xmlCopyEntity(void payload, const xmlChar name ATTRIBUTE_UNUSED) {
967	xmlEntityPtr ent = (xmlEntityPtr) payload;
968	xmlEntityPtr cur;
969
970	cur = (xmlEntityPtr) xmlMalloc(sizeof(xmlEntity));
971	if (cur == NULL) {
972	xmlEntitiesErrMemory("xmlCopyEntity:: malloc failed");
973	return(NULL);
974	}
975	memset(cur, 0, sizeof(xmlEntity));
976	cur->type = XML_ENTITY_DECL;
977
978	cur->etype = ent->etype;
979	if (ent->name != NULL)
980	cur->name = xmlStrdup(ent->name);
981	if (ent->ExternalID != NULL)
982	cur->ExternalID = xmlStrdup(ent->ExternalID);
983	if (ent->SystemID != NULL)
984	cur->SystemID = xmlStrdup(ent->SystemID);
985	if (ent->content != NULL)
986	cur->content = xmlStrdup(ent->content);
987	if (ent->orig != NULL)
988	cur->orig = xmlStrdup(ent->orig);
989	if (ent->URI != NULL)
990	cur->URI = xmlStrdup(ent->URI);
991	return(cur);
992	}
993
994	/**
995	* xmlCopyEntitiesTable:
996	* @table: An entity table
997	*
998	* Build a copy of an entity table.
999	*
1000	* Returns the new xmlEntitiesTablePtr or NULL in case of error.
1001	*/
1002	xmlEntitiesTablePtr
1003	xmlCopyEntitiesTable(xmlEntitiesTablePtr table) {
1004	return(xmlHashCopy(table, xmlCopyEntity));
1005	}
1006	#endif /* LIBXML_TREE_ENABLED */
1007
1008	#ifdef LIBXML_OUTPUT_ENABLED
1009
1010	/**
1011	* xmlDumpEntityContent:
1012	* @buf: An XML buffer.
1013	* @content: The entity content.
1014	*
1015	* This will dump the quoted string value, taking care of the special
1016	* treatment required by %
1017	*/
1018	static void
1019	xmlDumpEntityContent(xmlBufferPtr buf, const xmlChar *content) {
1020	if (buf->alloc == XML_BUFFER_ALLOC_IMMUTABLE) return;
1021	if (xmlStrchr(content, '%')) {
1022	const xmlChar * base, *cur;
1023
1024	xmlBufferCCat(buf, "\"");
1025	base = cur = content;
1026	while (*cur != 0) {
1027	if (*cur == '"') {
1028	if (base != cur)
1029	xmlBufferAdd(buf, base, cur - base);
1030	xmlBufferAdd(buf, BAD_CAST """, 6);
1031	cur++;
1032	base = cur;
1033	} else if (*cur == '%') {
1034	if (base != cur)
1035	xmlBufferAdd(buf, base, cur - base);
1036	xmlBufferAdd(buf, BAD_CAST "%", 6);
1037	cur++;
1038	base = cur;
1039	} else {
1040	cur++;
1041	}
1042	}
1043	if (base != cur)
1044	xmlBufferAdd(buf, base, cur - base);
1045	xmlBufferCCat(buf, "\"");
1046	} else {
1047	xmlBufferWriteQuotedString(buf, content);
1048	}
1049	}
1050
1051	/**
1052	* xmlDumpEntityDecl:
1053	* @buf: An XML buffer.
1054	* @ent: An entity table
1055	*
1056	* This will dump the content of the entity table as an XML DTD definition
1057	*/
1058	void
1059	xmlDumpEntityDecl(xmlBufferPtr buf, xmlEntityPtr ent) {
1060	if ((buf == NULL) \|\| (ent == NULL)) return;
1061	switch (ent->etype) {
1062	case XML_INTERNAL_GENERAL_ENTITY:
1063	xmlBufferWriteChar(buf, "<!ENTITY ");
1064	xmlBufferWriteCHAR(buf, ent->name);
1065	xmlBufferWriteChar(buf, " ");
1066	if (ent->orig != NULL)
1067	xmlBufferWriteQuotedString(buf, ent->orig);
1068	else
1069	xmlDumpEntityContent(buf, ent->content);
1070	xmlBufferWriteChar(buf, ">\n");
1071	break;
1072	case XML_EXTERNAL_GENERAL_PARSED_ENTITY:
1073	xmlBufferWriteChar(buf, "<!ENTITY ");
1074	xmlBufferWriteCHAR(buf, ent->name);
1075	if (ent->ExternalID != NULL) {
1076	xmlBufferWriteChar(buf, " PUBLIC ");
1077	xmlBufferWriteQuotedString(buf, ent->ExternalID);
1078	xmlBufferWriteChar(buf, " ");
1079	xmlBufferWriteQuotedString(buf, ent->SystemID);
1080	} else {
1081	xmlBufferWriteChar(buf, " SYSTEM ");
1082	xmlBufferWriteQuotedString(buf, ent->SystemID);
1083	}
1084	xmlBufferWriteChar(buf, ">\n");
1085	break;
1086	case XML_EXTERNAL_GENERAL_UNPARSED_ENTITY:
1087	xmlBufferWriteChar(buf, "<!ENTITY ");
1088	xmlBufferWriteCHAR(buf, ent->name);
1089	if (ent->ExternalID != NULL) {
1090	xmlBufferWriteChar(buf, " PUBLIC ");
1091	xmlBufferWriteQuotedString(buf, ent->ExternalID);
1092	xmlBufferWriteChar(buf, " ");
1093	xmlBufferWriteQuotedString(buf, ent->SystemID);
1094	} else {
1095	xmlBufferWriteChar(buf, " SYSTEM ");
1096	xmlBufferWriteQuotedString(buf, ent->SystemID);
1097	}
1098	if (ent->content != NULL) { /* Should be true ! */
1099	xmlBufferWriteChar(buf, " NDATA ");
1100	if (ent->orig != NULL)
1101	xmlBufferWriteCHAR(buf, ent->orig);
1102	else
1103	xmlBufferWriteCHAR(buf, ent->content);
1104	}
1105	xmlBufferWriteChar(buf, ">\n");
1106	break;
1107	case XML_INTERNAL_PARAMETER_ENTITY:
1108	xmlBufferWriteChar(buf, "<!ENTITY % ");
1109	xmlBufferWriteCHAR(buf, ent->name);
1110	xmlBufferWriteChar(buf, " ");
1111	if (ent->orig == NULL)
1112	xmlDumpEntityContent(buf, ent->content);
1113	else
1114	xmlBufferWriteQuotedString(buf, ent->orig);
1115	xmlBufferWriteChar(buf, ">\n");
1116	break;
1117	case XML_EXTERNAL_PARAMETER_ENTITY:
1118	xmlBufferWriteChar(buf, "<!ENTITY % ");
1119	xmlBufferWriteCHAR(buf, ent->name);
1120	if (ent->ExternalID != NULL) {
1121	xmlBufferWriteChar(buf, " PUBLIC ");
1122	xmlBufferWriteQuotedString(buf, ent->ExternalID);
1123	xmlBufferWriteChar(buf, " ");
1124	xmlBufferWriteQuotedString(buf, ent->SystemID);
1125	} else {
1126	xmlBufferWriteChar(buf, " SYSTEM ");
1127	xmlBufferWriteQuotedString(buf, ent->SystemID);
1128	}
1129	xmlBufferWriteChar(buf, ">\n");
1130	break;
1131	default:
1132	xmlEntitiesErr(XML_DTD_UNKNOWN_ENTITY,
1133	"xmlDumpEntitiesDecl: internal: unknown type entity type");
1134	}
1135	}
1136
1137	/**
1138	* xmlDumpEntityDeclScan:
1139	* @ent: An entity table
1140	* @buf: An XML buffer.
1141	*
1142	* When using the hash table scan function, arguments need to be reversed
1143	*/
1144	static void
1145	xmlDumpEntityDeclScan(void ent, void buf,
1146	const xmlChar *name ATTRIBUTE_UNUSED) {
1147	xmlDumpEntityDecl((xmlBufferPtr) buf, (xmlEntityPtr) ent);
1148	}
1149
1150	/**
1151	* xmlDumpEntitiesTable:
1152	* @buf: An XML buffer.
1153	* @table: An entity table
1154	*
1155	* This will dump the content of the entity table as an XML DTD definition
1156	*/
1157	void
1158	xmlDumpEntitiesTable(xmlBufferPtr buf, xmlEntitiesTablePtr table) {
1159	xmlHashScan(table, xmlDumpEntityDeclScan, buf);
1160	}
1161	#endif /* LIBXML_OUTPUT_ENABLED */
1162	#define bottom_entities
1163	#include "elfgcchack.h"

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