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elements.txx @ 111

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pridana knihovna XSD (a jeji chlebodarkyne XERCES), v ramci Win32 zprovoznen priklad tests/test_xsd_hello.cxx

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1	// file : xsd/cxx/parser/expat/elements.txx
2	// author : Boris Kolpackov <boris@codesynthesis.com>
3	// copyright : Copyright (c) 2005-2008 Code Synthesis Tools CC
4	// license : GNU GPL v2 + exceptions; see accompanying LICENSE file
5
6	#include <new> // std::bad_alloc
7	#include <istream>
8	#include <fstream>
9	#include <cstring> // std::strchr
10	#include <cassert>
11
12	#include <xsd/cxx/xml/bits/literals.hxx> // xml::bits::{xml_prefix, etc}
13
14	#include <xsd/cxx/parser/error-handler.hxx>
15	#include <xsd/cxx/parser/schema-exceptions.hxx>
16
17	namespace xsd
18	{
19	namespace cxx
20	{
21	namespace parser
22	{
23	namespace expat
24	{
25
26	// document
27	//
28
29	template <typename C>
30	document<C>::
31	document (parser_base<C>& p,
32	const std::basic_string<C>& name,
33	bool polymorphic)
34	: cxx::parser::document<C> (p, std::basic_string<C> (), name),
35	polymorphic_ (polymorphic),
36	router_ (*this, polymorphic),
37	xml_parser_ (0)
38	{
39	}
40
41	template <typename C>
42	document<C>::
43	document (parser_base<C>& p,
44	const C* name,
45	bool polymorphic)
46	: cxx::parser::document<C> (p, std::basic_string<C> (), name),
47	polymorphic_ (polymorphic),
48	router_ (*this, polymorphic),
49	xml_parser_ (0)
50	{
51	}
52
53	template <typename C>
54	document<C>::
55	document (parser_base<C>& p,
56	const C* ns,
57	const C* name,
58	bool polymorphic)
59	: cxx::parser::document<C> (p, ns, name),
60	polymorphic_ (polymorphic),
61	router_ (*this, polymorphic),
62	xml_parser_ (0)
63	{
64	}
65
66	template <typename C>
67	document<C>::
68	document (parser_base<C>& p,
69	const std::basic_string<C>& ns,
70	const std::basic_string<C>& name,
71	bool polymorphic)
72	: cxx::parser::document<C> (p, ns, name),
73	polymorphic_ (polymorphic),
74	router_ (*this, polymorphic),
75	xml_parser_ (0)
76	{
77	}
78
79	template <typename C>
80	document<C>::
81	document (bool polymorphic)
82	: polymorphic_ (polymorphic),
83	router_ (*this, polymorphic),
84	xml_parser_ (0)
85	{
86	}
87
88	// file
89	//
90
91	template <typename C>
92	void document<C>::
93	parse (const std::basic_string<C>& file)
94	{
95	std::ifstream ifs;
96	ifs.exceptions (std::ios_base::badbit \| std::ios_base::failbit);
97	ifs.open (file.c_str (), std::ios_base::in \| std::ios_base::binary);
98
99	parse (ifs, file);
100	}
101
102	template <typename C>
103	void document<C>::
104	parse (const std::basic_string<C>& file, xml::error_handler<C>& eh)
105	{
106	std::ifstream ifs;
107	ifs.exceptions (std::ios_base::badbit \| std::ios_base::failbit);
108	ifs.open (file.c_str (), std::ios_base::in \| std::ios_base::binary);
109
110	parse (ifs, file, eh);
111	}
112
113
114	// istream
115	//
116
117	template <typename C>
118	void document<C>::
119	parse (std::istream& is)
120	{
121	error_handler<C> eh;
122	parse (is, 0, 0, eh);
123	eh.throw_if_failed ();
124	}
125
126	template <typename C>
127	void document<C>::
128	parse (std::istream& is, xml::error_handler<C>& eh)
129	{
130	if (!parse (is, 0, 0, eh))
131	throw parsing<C> ();
132	}
133
134	template <typename C>
135	void document<C>::
136	parse (std::istream& is, const std::basic_string<C>& system_id)
137	{
138	error_handler<C> eh;
139	parse (is, &system_id, 0, eh);
140	eh.throw_if_failed ();
141	}
142
143	template <typename C>
144	void document<C>::
145	parse (std::istream& is,
146	const std::basic_string<C>& system_id,
147	xml::error_handler<C>& eh)
148	{
149	if (!parse (is, &system_id, 0, eh))
150	throw parsing<C> ();
151	}
152
153	template <typename C>
154	void document<C>::
155	parse (std::istream& is,
156	const std::basic_string<C>& system_id,
157	const std::basic_string<C>& public_id)
158	{
159	error_handler<C> eh;
160	parse (is, &system_id, &public_id, eh);
161	eh.throw_if_failed ();
162	}
163
164	template <typename C>
165	void document<C>::
166	parse (std::istream& is,
167	const std::basic_string<C>& system_id,
168	const std::basic_string<C>& public_id,
169	xml::error_handler<C>& eh)
170	{
171	if (!parse (is, &system_id, &public_id, eh))
172	throw parsing<C> ();
173	}
174
175	// data
176	//
177
178	template <typename C>
179	void document<C>::
180	parse (const void* data, std::size_t size, bool last)
181	{
182	error_handler<C> eh;
183	parse (data, size, last, 0, 0, eh);
184	eh.throw_if_failed ();
185	}
186
187	template <typename C>
188	void document<C>::
189	parse (const void* data, std::size_t size, bool last,
190	xml::error_handler<C>& eh)
191	{
192	if (!parse (data, size, last, 0, 0, eh))
193	throw parsing<C> ();
194	}
195
196	template <typename C>
197	void document<C>::
198	parse (const void* data, std::size_t size, bool last,
199	const std::basic_string<C>& system_id)
200	{
201	error_handler<C> eh;
202	parse (data, size, last, &system_id, 0, eh);
203	eh.throw_if_failed ();
204	}
205
206	template <typename C>
207	void document<C>::
208	parse (const void* data, std::size_t size, bool last,
209	const std::basic_string<C>& system_id,
210	xml::error_handler<C>& eh)
211	{
212	if (!parse (data, size, last, &system_id, 0, eh))
213	throw parsing<C> ();
214	}
215
216	template <typename C>
217	void document<C>::
218	parse (const void* data, std::size_t size, bool last,
219	const std::basic_string<C>& system_id,
220	const std::basic_string<C>& public_id)
221	{
222	error_handler<C> eh;
223	parse (data, size, last, &system_id, &public_id, eh);
224	eh.throw_if_failed ();
225	}
226
227	template <typename C>
228	void document<C>::
229	parse (const void* data, std::size_t size, bool last,
230	const std::basic_string<C>& system_id,
231	const std::basic_string<C>& public_id,
232	xml::error_handler<C>& eh)
233	{
234	if (!parse (data, size, last, &system_id, &public_id, eh))
235	throw parsing<C> ();
236	}
237
238	// Implementation details.
239	//
240
241	namespace bits
242	{
243	struct stream_exception_controller
244	{
245	~stream_exception_controller ()
246	{
247	if (is_.fail () && is_.eof ())
248	is_.clear (is_.rdstate () & ~std::ios_base::failbit);
249
250	is_.exceptions (old_state_);
251	}
252
253	stream_exception_controller (std::istream& is)
254	: is_ (is), old_state_ (is_.exceptions ())
255	{
256	is_.exceptions (old_state_ & ~std::ios_base::failbit);
257	}
258
259	private:
260	stream_exception_controller (const stream_exception_controller&);
261
262	stream_exception_controller&
263	operator= (const stream_exception_controller&);
264
265	private:
266	std::istream& is_;
267	std::ios_base::iostate old_state_;
268	};
269	};
270
271	template <typename C>
272	bool document<C>::
273	parse (std::istream& is,
274	const std::basic_string<C>* system_id,
275	const std::basic_string<C>* public_id,
276	xml::error_handler<C>& eh)
277	{
278	parser_auto_ptr parser (XML_ParserCreateNS (0, XML_Char (' ')));
279
280	if (parser == 0)
281	throw std::bad_alloc ();
282
283	parse_begin (parser);
284
285	// Temporarily unset the exception failbit. Also clear the
286	// fail bit when we reset the old state if it was caused
287	// by eof.
288	//
289	bits::stream_exception_controller sec (is);
290
291	char buf[16384]; // 4 x page size.
292
293	do
294	{
295	is.read (buf, sizeof (buf));
296
297	if (is.bad () \|\| (is.fail () && !is.eof ()))
298	{
299	// If the stream is not using exceptions then the user
300	// will have to test for stream failures before calling
301	// post.
302	//
303	return true;
304	}
305
306	try
307	{
308	if (XML_Parse (
309	parser, buf, is.gcount (), is.eof ()) == XML_STATUS_ERROR)
310	{
311	unsigned long l (XML_GetCurrentLineNumber (xml_parser_));
312	unsigned long c (XML_GetCurrentColumnNumber (xml_parser_));
313	std::basic_string<C> message (
314	XML_ErrorString (XML_GetErrorCode (xml_parser_)));
315
316	parse_end ();
317
318	eh.handle (
319	public_id
320	? *public_id
321	: (system_id ? *system_id : std::basic_string<C> ()),
322	l, c, xml::error_handler<C>::severity::fatal, message);
323
324	return false;
325	}
326	}
327	catch (const schema_exception<C>& e)
328	{
329	unsigned long l (XML_GetCurrentLineNumber (xml_parser_));
330	unsigned long c (XML_GetCurrentColumnNumber (xml_parser_));
331
332	parse_end ();
333
334	eh.handle (
335	public_id
336	? *public_id
337	: (system_id ? *system_id : std::basic_string<C> ()),
338	l, c, xml::error_handler<C>::severity::fatal, e.message ());
339
340	return false;
341	}
342
343	} while (!is.eof ());
344
345	parse_end ();
346
347	return true;
348	}
349
350	template <typename C>
351	bool document<C>::
352	parse (const void* data,
353	std::size_t size,
354	bool last,
355	const std::basic_string<C>* system_id,
356	const std::basic_string<C>* public_id,
357	xml::error_handler<C>& eh)
358	{
359	// First call.
360	//
361	if (auto_xml_parser_ == 0)
362	{
363	auto_xml_parser_ = XML_ParserCreateNS (0, XML_Char (' '));
364
365	if (auto_xml_parser_ == 0)
366	throw std::bad_alloc ();
367
368	parse_begin (auto_xml_parser_);
369	}
370
371	try
372	{
373	if (XML_Parse (xml_parser_,
374	static_cast<const char*> (data),
375	static_cast<int> (size),
376	last) == XML_STATUS_ERROR)
377	{
378	unsigned long l (XML_GetCurrentLineNumber (xml_parser_));
379	unsigned long c (XML_GetCurrentColumnNumber (xml_parser_));
380	std::basic_string<C> message (
381	XML_ErrorString (XML_GetErrorCode (xml_parser_)));
382
383	parse_end ();
384
385	eh.handle (
386	public_id
387	? *public_id
388	: (system_id ? *system_id : std::basic_string<C> ()),
389	l, c, xml::error_handler<C>::severity::fatal, message);
390
391	return false;
392	}
393	}
394	catch (const schema_exception<C>& e)
395	{
396	unsigned long l (XML_GetCurrentLineNumber (xml_parser_));
397	unsigned long c (XML_GetCurrentColumnNumber (xml_parser_));
398
399	parse_end ();
400
401	eh.handle (
402	public_id
403	? *public_id
404	: (system_id ? *system_id : std::basic_string<C> ()),
405	l, c, xml::error_handler<C>::severity::fatal, e.message ());
406
407	return false;
408	}
409
410	if (last)
411	parse_end ();
412
413	return true;
414	}
415
416	// XML_Parser
417	//
418
419	template <typename C>
420	void document<C>::
421	parse_begin (XML_Parser parser)
422	{
423	xml_parser_ = parser;
424	set ();
425	}
426
427	template <typename C>
428	void document<C>::
429	parse_end ()
430	{
431	clear ();
432	xml_parser_ = 0;
433	auto_xml_parser_ = 0;
434	}
435
436	//
437	//
438	template <typename C>
439	void document<C>::
440	set ()
441	{
442	assert (xml_parser_ != 0);
443
444	XML_SetUserData(xml_parser_, &router_);
445
446	XML_SetStartElementHandler (
447	xml_parser_, event_router<C>::start_element);
448	XML_SetEndElementHandler (
449	xml_parser_, event_router<C>::end_element);
450	XML_SetCharacterDataHandler (
451	xml_parser_, event_router<C>::characters);
452
453	if (polymorphic_)
454	{
455	XML_SetNamespaceDeclHandler (
456	xml_parser_,
457	event_router<C>::start_namespace_decl,
458	event_router<C>::end_namespace_decl);
459	}
460	}
461
462	template <typename C>
463	void document<C>::
464	clear ()
465	{
466	assert (xml_parser_ != 0);
467
468	XML_SetUserData (xml_parser_, 0);
469	XML_SetStartElementHandler (xml_parser_, 0);
470	XML_SetEndElementHandler (xml_parser_, 0);
471	XML_SetCharacterDataHandler (xml_parser_, 0);
472
473	if (polymorphic_)
474	XML_SetNamespaceDeclHandler (xml_parser_, 0, 0);
475	}
476
477	// event_router
478	//
479
480	template <typename C>
481	event_router<C>::
482	event_router (cxx::parser::document<C>& consumer, bool polymorphic)
483	: consumer_ (consumer), polymorphic_ (polymorphic)
484	{
485	}
486
487	// Expat thunks.
488	//
489	template <typename C>
490	void XMLCALL event_router<C>::
491	start_element (
492	void* data, const XML_Char* ns_name, const XML_Char** atts)
493	{
494	event_router& r (reinterpret_cast<event_router> (data));
495	r.start_element_ (ns_name, atts);
496	}
497
498	template <typename C>
499	void XMLCALL event_router<C>::
500	end_element (void* data, const XML_Char* ns_name)
501	{
502	event_router& r (reinterpret_cast<event_router> (data));
503	r.end_element_ (ns_name);
504	}
505
506	template <typename C>
507	void XMLCALL event_router<C>::
508	characters (void* data, const XML_Char* s, int n)
509	{
510	event_router& r (reinterpret_cast<event_router> (data));
511	r.characters_ (s, static_cast<std::size_t> (n));
512	}
513
514	template <typename C>
515	void XMLCALL event_router<C>::
516	start_namespace_decl (void* data,
517	const XML_Char* prefix,
518	const XML_Char* ns)
519	{
520	event_router& r (reinterpret_cast<event_router> (data));
521	r.start_namespace_decl_ (prefix, ns);
522	}
523
524	template <typename C>
525	void XMLCALL event_router<C>::
526	end_namespace_decl (void* data, const XML_Char* prefix)
527	{
528	event_router& r (reinterpret_cast<event_router> (data));
529	r.end_namespace_decl_ (prefix);
530	}
531
532	namespace bits
533	{
534	inline void
535	split_name (const XML_Char* s,
536	const char*& ns, std::size_t& ns_s,
537	const char*& name, std::size_t& name_s)
538	{
539	const char* p (std::strchr (s, ' '));
540
541	if (p)
542	{
543	ns = s;
544	ns_s = p - s;
545	name = p + 1;
546	}
547	else
548	{
549	ns = s;
550	ns_s = 0;
551	name = s;
552	}
553
554	name_s = std::char_traits<char>::length (name);
555	}
556	}
557
558	template <typename C>
559	void event_router<C>::
560	start_element_ (const XML_Char* ns_name, const XML_Char** atts)
561	{
562	typedef std::basic_string<C> string;
563
564	const char* ns_p;
565	const char* name_p;
566	size_t ns_s, name_s;
567
568	bits::split_name (ns_name, ns_p, ns_s, name_p, name_s);
569
570	{
571	const ro_string<C> ns (ns_p, ns_s), name (name_p, name_s);
572
573	if (!polymorphic_)
574	consumer_.start_element (ns, name, 0);
575	else
576	{
577	// Search for the xsi:type attribute.
578	//
579	const XML_Char** p (atts);
580	for (; *p != 0; p += 2)
581	{
582	bits::split_name (*p, ns_p, ns_s, name_p, name_s);
583	const ro_string<C> ns (ns_p, ns_s), name (name_p, name_s);
584
585	if (name == xml::bits::type<C> () &&
586	ns == xml::bits::xsi_namespace<C> ())
587	break;
588	}
589
590	if (*p == 0)
591	consumer_.start_element (ns, name, 0);
592	else
593	{
594	// @@ Need proper QName validation.
595	//
596	// Get the qualified type name and try to resolve it.
597	//
598	ro_string<C> qn (*(p + 1));
599
600	string tp, tn, tns;
601	typename ro_string<C>::size_type pos (qn.find (C (':')));
602
603	if (pos != ro_string<C>::npos)
604	{
605	tp.assign (qn.data (), pos);
606	tn.assign (qn.data () + pos + 1);
607
608	if (tp.empty ())
609	throw dynamic_type<C> (qn);
610	}
611	else
612	tn = qn;
613
614	if (tn.empty ())
615	throw dynamic_type<C> (qn);
616
617	// Search our namespace declaration stack. Sun CC 5.7
618	// blows if we use const_reverse_iterator.
619	//
620	for (typename ns_decls::reverse_iterator
621	it (ns_decls_.rbegin ()), e (ns_decls_.rend ());
622	it != e; ++it)
623	{
624	if (it->prefix == tp)
625	{
626	tns = it->ns;
627	break;
628	}
629	}
630
631	if (!tp.empty () && tns.empty ())
632	{
633	// The 'xml' prefix requires special handling.
634	//
635	if (tp == xml::bits::xml_prefix<C> ())
636	tns = xml::bits::xml_namespace<C> ();
637	else
638	throw dynamic_type<C> (qn);
639	}
640
641	// Construct the compound name.
642	//
643	if (!tns.empty ())
644	{
645	tn += C (' ');
646	tn += tns;
647	}
648
649	ro_string<C> ro_tn (tn);
650
651	consumer_.start_element (ns, name, &ro_tn);
652	}
653	}
654	}
655
656	for (; *atts != 0; atts += 2)
657	{
658	bits::split_name (*atts, ns_p, ns_s, name_p, name_s);
659
660	const ro_string<C> ns (ns_p, ns_s), name (name_p, name_s);
661	const ro_string<C> value (*(atts + 1));
662
663	consumer_.attribute (ns, name, value);
664	}
665	}
666
667	template <typename C>
668	void event_router<C>::
669	end_element_ (const XML_Char* ns_name)
670	{
671	const char* ns_p;
672	const char* name_p;
673	size_t ns_s, name_s;
674
675	bits::split_name (ns_name, ns_p, ns_s, name_p, name_s);
676
677	const ro_string<C> ns (ns_p, ns_s), name (name_p, name_s);
678
679	consumer_.end_element (ns, name);
680	}
681
682	template <typename C>
683	void event_router<C>::
684	characters_ (const XML_Char* s, std::size_t n)
685	{
686	if (n != 0)
687	{
688	const ro_string<C> str (s, n);
689	consumer_.characters (str);
690	}
691	}
692
693	template <typename C>
694	void event_router<C>::
695	start_namespace_decl_ (const XML_Char* p, const XML_Char* ns)
696	{
697	// prefix is 0 for default namespace
698	// namespace is 0 when unsetting default namespace
699	//
700	if (polymorphic_)
701	{
702	ns_decls_.push_back (ns_decl ((p ? p : ""), (ns ? ns : "")));
703	}
704	}
705
706	template <typename C>
707	void event_router<C>::
708	end_namespace_decl_ (const XML_Char* p)
709	{
710	// prefix is 0 for default namespace
711	//
712	if (polymorphic_)
713	{
714	// Here we assume the prefixes are removed in the reverse
715	// order of them being added. This appears to how every
716	// sensible implementation works.
717	//
718	assert (p
719	? ns_decls_.back ().prefix == p
720	: ns_decls_.back ().prefix.empty ());
721
722	ns_decls_.pop_back ();
723	}
724	}
725	}
726	}
727	}
728	}

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