functions.c@ 14437

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Added libxslt-1.1.22 sources.
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1	/*
2	* functions.c: Implementation of the XSLT extra functions
3	*
4	* Reference:
5	* http://www.w3.org/TR/1999/REC-xslt-19991116
6	*
7	* See Copyright for the status of this software.
8	*
9	* [email protected]
10	* Bjorn Reese <[email protected]> for number formatting
11	*/
12
13	#define IN_LIBXSLT
14	#include "libxslt.h"
15
16	#include <string.h>
17
18	#ifdef HAVE_SYS_TYPES_H
19	#include <sys/types.h>
20	#endif
21	#ifdef HAVE_CTYPE_H
22	#include <ctype.h>
23	#endif
24
25	#include <libxml/xmlmemory.h>
26	#include <libxml/parser.h>
27	#include <libxml/tree.h>
28	#include <libxml/valid.h>
29	#include <libxml/hash.h>
30	#include <libxml/xmlerror.h>
31	#include <libxml/xpath.h>
32	#include <libxml/xpathInternals.h>
33	#include <libxml/parserInternals.h>
34	#include <libxml/uri.h>
35	#include <libxml/xpointer.h>
36	#include "xslt.h"
37	#include "xsltInternals.h"
38	#include "xsltutils.h"
39	#include "functions.h"
40	#include "extensions.h"
41	#include "numbersInternals.h"
42	#include "keys.h"
43	#include "documents.h"
44
45	#ifdef WITH_XSLT_DEBUG
46	#define WITH_XSLT_DEBUG_FUNCTION
47	#endif
48
49	/*
50	* Some versions of DocBook XSL use the vendor string to detect
51	* supporting chunking, this is a workaround to be considered
52	* in the list of decent XSLT processors <grin/>
53	*/
54	#define DOCBOOK_XSL_HACK
55
56	/**
57	* xsltXPathFunctionLookup:
58	* @ctxt: a void * but the XSLT transformation context actually
59	* @name: the function name
60	* @ns_uri: the function namespace URI
61	*
62	* This is the entry point when a function is needed by the XPath
63	* interpretor.
64	*
65	* Returns the callback function or NULL if not found
66	*/
67	xmlXPathFunction
68	xsltXPathFunctionLookup (xmlXPathContextPtr ctxt,
69	const xmlChar name, const xmlChar ns_uri) {
70	xmlXPathFunction ret;
71
72	if ((ctxt == NULL) \|\| (name == NULL) \|\| (ns_uri == NULL))
73	return (NULL);
74
75	#ifdef WITH_XSLT_DEBUG_FUNCTION
76	xsltGenericDebug(xsltGenericDebugContext,
77	"Lookup function {%s}%s\n", ns_uri, name);
78	#endif
79
80	/* give priority to context-level functions */
81	/*
82	ret = (xmlXPathFunction) xmlHashLookup2(ctxt->funcHash, name, ns_uri);
83	*/
84	XML_CAST_FPTR(ret) = xmlHashLookup2(ctxt->funcHash, name, ns_uri);
85
86	if (ret == NULL)
87	ret = xsltExtModuleFunctionLookup(name, ns_uri);
88
89	#ifdef WITH_XSLT_DEBUG_FUNCTION
90	if (ret != NULL)
91	xsltGenericDebug(xsltGenericDebugContext,
92	"found function %s\n", name);
93	#endif
94	return(ret);
95	}
96
97
98	/************************************************************************
99	* *
100	* Module interfaces *
101	* *
102	************************************************************************/
103
104	static void
105	xsltDocumentFunctionLoadDocument(xmlXPathParserContextPtr ctxt, xmlChar* URI)
106	{
107	xsltTransformContextPtr tctxt;
108	xmlURIPtr uri;
109	xmlChar *fragment;
110	xsltDocumentPtr idoc; /* document info */
111	xmlDocPtr doc;
112	xmlXPathContextPtr xptrctxt = NULL;
113	xmlXPathObjectPtr resObj = NULL;
114
115	tctxt = xsltXPathGetTransformContext(ctxt);
116	if (tctxt == NULL) {
117	xsltTransformError(NULL, NULL, NULL,
118	"document() : internal error tctxt == NULL\n");
119	valuePush(ctxt, xmlXPathNewNodeSet(NULL));
120	return;
121	}
122
123	uri = xmlParseURI((const char *) URI);
124	if (uri == NULL) {
125	xsltTransformError(tctxt, NULL, NULL,
126	"document() : failed to parse URI\n");
127	valuePush(ctxt, xmlXPathNewNodeSet(NULL));
128	return;
129	}
130
131	/*
132	* check for and remove fragment identifier
133	*/
134	fragment = (xmlChar *)uri->fragment;
135	if (fragment != NULL) {
136	xmlChar *newURI;
137	uri->fragment = NULL;
138	newURI = xmlSaveUri(uri);
139	idoc = xsltLoadDocument(tctxt, newURI);
140	xmlFree(newURI);
141	} else
142	idoc = xsltLoadDocument(tctxt, URI);
143	xmlFreeURI(uri);
144
145	if (idoc == NULL) {
146	if ((URI == NULL) \|\|
147	(URI[0] == '#') \|\|
148	((tctxt->style->doc != NULL) &&
149	(xmlStrEqual(tctxt->style->doc->URL, URI))))
150	{
151	/*
152	* This selects the stylesheet's doc itself.
153	*/
154	doc = tctxt->style->doc;
155	} else {
156	valuePush(ctxt, xmlXPathNewNodeSet(NULL));
157
158	if (fragment != NULL)
159	xmlFree(fragment);
160
161	return;
162	}
163	} else
164	doc = idoc->doc;
165
166	if (fragment == NULL) {
167	valuePush(ctxt, xmlXPathNewNodeSet((xmlNodePtr) doc));
168	return;
169	}
170
171	/* use XPointer of HTML location for fragment ID */
172	#ifdef LIBXML_XPTR_ENABLED
173	xptrctxt = xmlXPtrNewContext(doc, NULL, NULL);
174	if (xptrctxt == NULL) {
175	xsltTransformError(tctxt, NULL, NULL,
176	"document() : internal error xptrctxt == NULL\n");
177	goto out_fragment;
178	}
179
180	resObj = xmlXPtrEval(fragment, xptrctxt);
181	xmlXPathFreeContext(xptrctxt);
182	#endif
183	xmlFree(fragment);
184
185	if (resObj == NULL)
186	goto out_fragment;
187
188	switch (resObj->type) {
189	case XPATH_NODESET:
190	break;
191	case XPATH_UNDEFINED:
192	case XPATH_BOOLEAN:
193	case XPATH_NUMBER:
194	case XPATH_STRING:
195	case XPATH_POINT:
196	case XPATH_USERS:
197	case XPATH_XSLT_TREE:
198	case XPATH_RANGE:
199	case XPATH_LOCATIONSET:
200	xsltTransformError(tctxt, NULL, NULL,
201	"document() : XPointer does not select a node set: #%s\n",
202	fragment);
203	goto out_object;
204	}
205
206	valuePush(ctxt, resObj);
207	return;
208
209	out_object:
210	xmlXPathFreeObject(resObj);
211
212	out_fragment:
213	valuePush(ctxt, xmlXPathNewNodeSet(NULL));
214	}
215
216	/**
217	* xsltDocumentFunction:
218	* @ctxt: the XPath Parser context
219	* @nargs: the number of arguments
220	*
221	* Implement the document() XSLT function
222	* node-set document(object, node-set?)
223	*/
224	void
225	xsltDocumentFunction(xmlXPathParserContextPtr ctxt, int nargs)
226	{
227	xmlXPathObjectPtr obj, obj2 = NULL;
228	xmlChar base = NULL, URI;
229
230
231	if ((nargs < 1) \|\| (nargs > 2)) {
232	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
233	"document() : invalid number of args %d\n",
234	nargs);
235	ctxt->error = XPATH_INVALID_ARITY;
236	return;
237	}
238	if (ctxt->value == NULL) {
239	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
240	"document() : invalid arg value\n");
241	ctxt->error = XPATH_INVALID_TYPE;
242	return;
243	}
244
245	if (nargs == 2) {
246	if (ctxt->value->type != XPATH_NODESET) {
247	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
248	"document() : invalid arg expecting a nodeset\n");
249	ctxt->error = XPATH_INVALID_TYPE;
250	return;
251	}
252
253	obj2 = valuePop(ctxt);
254	}
255
256	if (ctxt->value->type == XPATH_NODESET) {
257	int i;
258	xmlXPathObjectPtr newobj, ret;
259
260	obj = valuePop(ctxt);
261	ret = xmlXPathNewNodeSet(NULL);
262
263	if (obj->nodesetval) {
264	for (i = 0; i < obj->nodesetval->nodeNr; i++) {
265	valuePush(ctxt,
266	xmlXPathNewNodeSet(obj->nodesetval->nodeTab[i]));
267	xmlXPathStringFunction(ctxt, 1);
268	if (nargs == 2) {
269	valuePush(ctxt, xmlXPathObjectCopy(obj2));
270	} else {
271	valuePush(ctxt,
272	xmlXPathNewNodeSet(obj->nodesetval->
273	nodeTab[i]));
274	}
275	xsltDocumentFunction(ctxt, 2);
276	newobj = valuePop(ctxt);
277	ret->nodesetval = xmlXPathNodeSetMerge(ret->nodesetval,
278	newobj->nodesetval);
279	xmlXPathFreeObject(newobj);
280	}
281	}
282
283	xmlXPathFreeObject(obj);
284	if (obj2 != NULL)
285	xmlXPathFreeObject(obj2);
286	valuePush(ctxt, ret);
287	return;
288	}
289	/*
290	* Make sure it's converted to a string
291	*/
292	xmlXPathStringFunction(ctxt, 1);
293	if (ctxt->value->type != XPATH_STRING) {
294	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
295	"document() : invalid arg expecting a string\n");
296	ctxt->error = XPATH_INVALID_TYPE;
297	if (obj2 != NULL)
298	xmlXPathFreeObject(obj2);
299	return;
300	}
301	obj = valuePop(ctxt);
302	if (obj->stringval == NULL) {
303	valuePush(ctxt, xmlXPathNewNodeSet(NULL));
304	} else {
305	if ((obj2 != NULL) && (obj2->nodesetval != NULL) &&
306	(obj2->nodesetval->nodeNr > 0) &&
307	IS_XSLT_REAL_NODE(obj2->nodesetval->nodeTab[0])) {
308	xmlNodePtr target;
309
310	target = obj2->nodesetval->nodeTab[0];
311	if ((target->type == XML_ATTRIBUTE_NODE) \|\|
312	(target->type == XML_PI_NODE)) {
313	target = ((xmlAttrPtr) target)->parent;
314	}
315	base = xmlNodeGetBase(target->doc, target);
316	} else {
317	xsltTransformContextPtr tctxt;
318
319	tctxt = xsltXPathGetTransformContext(ctxt);
320	if ((tctxt != NULL) && (tctxt->inst != NULL)) {
321	base = xmlNodeGetBase(tctxt->inst->doc, tctxt->inst);
322	} else if ((tctxt != NULL) && (tctxt->style != NULL) &&
323	(tctxt->style->doc != NULL)) {
324	base = xmlNodeGetBase(tctxt->style->doc,
325	(xmlNodePtr) tctxt->style->doc);
326	}
327	}
328	URI = xmlBuildURI(obj->stringval, base);
329	if (base != NULL)
330	xmlFree(base);
331	if (URI == NULL) {
332	valuePush(ctxt, xmlXPathNewNodeSet(NULL));
333	} else {
334	xsltDocumentFunctionLoadDocument( ctxt, URI );
335	xmlFree(URI);
336	}
337	}
338	xmlXPathFreeObject(obj);
339	if (obj2 != NULL)
340	xmlXPathFreeObject(obj2);
341	}
342
343	/**
344	* xsltKeyFunction:
345	* @ctxt: the XPath Parser context
346	* @nargs: the number of arguments
347	*
348	* Implement the key() XSLT function
349	* node-set key(string, object)
350	*/
351	void
352	xsltKeyFunction(xmlXPathParserContextPtr ctxt, int nargs){
353	xmlXPathObjectPtr obj1, obj2;
354
355	if (nargs != 2) {
356	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
357	"key() : expects two arguments\n");
358	ctxt->error = XPATH_INVALID_ARITY;
359	return;
360	}
361
362	/*
363	* Get the key's value.
364	*/
365	obj2 = valuePop(ctxt);
366	xmlXPathStringFunction(ctxt, 1);
367	if ((obj2 == NULL) \|\|
368	(ctxt->value == NULL) \|\| (ctxt->value->type != XPATH_STRING)) {
369	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
370	"key() : invalid arg expecting a string\n");
371	ctxt->error = XPATH_INVALID_TYPE;
372	xmlXPathFreeObject(obj2);
373
374	return;
375	}
376	/*
377	* Get the key's name.
378	*/
379	obj1 = valuePop(ctxt);
380
381	if ((obj2->type == XPATH_NODESET) \|\| (obj2->type == XPATH_XSLT_TREE)) {
382	int i;
383	xmlXPathObjectPtr newobj, ret;
384
385	ret = xmlXPathNewNodeSet(NULL);
386
387	if (obj2->nodesetval != NULL) {
388	for (i = 0; i < obj2->nodesetval->nodeNr; i++) {
389	valuePush(ctxt, xmlXPathObjectCopy(obj1));
390	valuePush(ctxt,
391	xmlXPathNewNodeSet(obj2->nodesetval->nodeTab[i]));
392	xmlXPathStringFunction(ctxt, 1);
393	xsltKeyFunction(ctxt, 2);
394	newobj = valuePop(ctxt);
395	ret->nodesetval = xmlXPathNodeSetMerge(ret->nodesetval,
396	newobj->nodesetval);
397	xmlXPathFreeObject(newobj);
398	}
399	}
400	valuePush(ctxt, ret);
401	} else {
402	xmlNodeSetPtr nodelist = NULL;
403	xmlChar key = NULL, value;
404	const xmlChar *keyURI;
405	xsltTransformContextPtr tctxt;
406	xmlChar qname, prefix;
407	xmlXPathContextPtr xpctxt = ctxt->context;
408	xmlNodePtr tmpNode = NULL;
409	xsltDocumentPtr oldDocInfo;
410
411	tctxt = xsltXPathGetTransformContext(ctxt);
412
413	oldDocInfo = tctxt->document;
414
415	if (xpctxt->node == NULL) {
416	xsltTransformError(tctxt, NULL, tctxt->inst,
417	"Internal error in xsltKeyFunction(): "
418	"The context node is not set on the XPath context.\n");
419	tctxt->state = XSLT_STATE_STOPPED;
420	goto error;
421	}
422	/*
423	* Get the associated namespace URI if qualified name
424	*/
425	qname = obj1->stringval;
426	key = xmlSplitQName2(qname, &prefix);
427	if (key == NULL) {
428	key = xmlStrdup(obj1->stringval);
429	keyURI = NULL;
430	if (prefix != NULL)
431	xmlFree(prefix);
432	} else {
433	if (prefix != NULL) {
434	keyURI = xmlXPathNsLookup(xpctxt, prefix);
435	if (keyURI == NULL) {
436	xsltTransformError(tctxt, NULL, tctxt->inst,
437	"key() : prefix %s is not bound\n", prefix);
438	/*
439	* TODO: Shouldn't we stop here?
440	*/
441	}
442	xmlFree(prefix);
443	} else {
444	keyURI = NULL;
445	}
446	}
447
448	/*
449	* Force conversion of first arg to string
450	*/
451	valuePush(ctxt, obj2);
452	xmlXPathStringFunction(ctxt, 1);
453	if ((ctxt->value == NULL) \|\| (ctxt->value->type != XPATH_STRING)) {
454	xsltTransformError(tctxt, NULL, tctxt->inst,
455	"key() : invalid arg expecting a string\n");
456	ctxt->error = XPATH_INVALID_TYPE;
457	goto error;
458	}
459	obj2 = valuePop(ctxt);
460	value = obj2->stringval;
461
462	/*
463	* We need to ensure that ctxt->document is available for
464	* xsltGetKey().
465	* First find the relevant doc, which is the context node's
466	* owner doc; using context->doc is not safe, since
467	* the doc could have been acquired via the document() function,
468	* or the doc might be a Result Tree Fragment.
469	* FUTURE INFO: In XSLT 2.0 the key() function takes an additional
470	* argument indicating the doc to use.
471	*/
472	if (xpctxt->node->type == XML_NAMESPACE_DECL) {
473	/*
474	* REVISIT: This is a libxml hack! Check xpath.c for details.
475	* The XPath module sets the owner element of a ns-node on
476	* the ns->next field.
477	*/
478	if ((((xmlNsPtr) xpctxt->node)->next != NULL) &&
479	(((xmlNsPtr) xpctxt->node)->next->type == XML_ELEMENT_NODE))
480	{
481	tmpNode = (xmlNodePtr) ((xmlNsPtr) xpctxt->node)->next;
482	}
483	} else
484	tmpNode = xpctxt->node;
485
486	if ((tmpNode == NULL) \|\| (tmpNode->doc == NULL)) {
487	xsltTransformError(tctxt, NULL, tctxt->inst,
488	"Internal error in xsltKeyFunction(): "
489	"Couldn't get the doc of the XPath context node.\n");
490	goto error;
491	}
492
493	if ((tctxt->document == NULL) \|\|
494	(tctxt->document->doc != tmpNode->doc))
495	{
496	if (tmpNode->doc->name && (tmpNode->doc->name[0] == ' ')) {
497	/*
498	* This is a Result Tree Fragment.
499	*/
500	if (tmpNode->doc->_private == NULL) {
501	tmpNode->doc->_private = xsltNewDocument(tctxt, tmpNode->doc);
502	if (tmpNode->doc->_private == NULL)
503	goto error;
504	}
505	tctxt->document = (xsltDocumentPtr) tmpNode->doc->_private;
506	} else {
507	/*
508	* May be the initial source doc or a doc acquired via the
509	* document() function.
510	*/
511	tctxt->document = xsltFindDocument(tctxt, tmpNode->doc);
512	}
513	if (tctxt->document == NULL) {
514	xsltTransformError(tctxt, NULL, tctxt->inst,
515	"Internal error in xsltKeyFunction(): "
516	"Could not get the document info of a context doc.\n");
517	tctxt->state = XSLT_STATE_STOPPED;
518	goto error;
519	}
520	}
521	/*
522	* Get/compute the key value.
523	*/
524	nodelist = xsltGetKey(tctxt, key, keyURI, value);
525
526	error:
527	tctxt->document = oldDocInfo;
528	valuePush(ctxt, xmlXPathWrapNodeSet(
529	xmlXPathNodeSetMerge(NULL, nodelist)));
530	if (key != NULL)
531	xmlFree(key);
532	}
533
534	if (obj1 != NULL)
535	xmlXPathFreeObject(obj1);
536	if (obj2 != NULL)
537	xmlXPathFreeObject(obj2);
538	}
539
540	/**
541	* xsltUnparsedEntityURIFunction:
542	* @ctxt: the XPath Parser context
543	* @nargs: the number of arguments
544	*
545	* Implement the unparsed-entity-uri() XSLT function
546	* string unparsed-entity-uri(string)
547	*/
548	void
549	xsltUnparsedEntityURIFunction(xmlXPathParserContextPtr ctxt, int nargs){
550	xmlXPathObjectPtr obj;
551	xmlChar *str;
552
553	if ((nargs != 1) \|\| (ctxt->value == NULL)) {
554	xsltGenericError(xsltGenericErrorContext,
555	"unparsed-entity-uri() : expects one string arg\n");
556	ctxt->error = XPATH_INVALID_ARITY;
557	return;
558	}
559	obj = valuePop(ctxt);
560	if (obj->type != XPATH_STRING) {
561	obj = xmlXPathConvertString(obj);
562	}
563
564	str = obj->stringval;
565	if (str == NULL) {
566	valuePush(ctxt, xmlXPathNewString((const xmlChar *)""));
567	} else {
568	xmlEntityPtr entity;
569
570	entity = xmlGetDocEntity(ctxt->context->doc, str);
571	if (entity == NULL) {
572	valuePush(ctxt, xmlXPathNewString((const xmlChar *)""));
573	} else {
574	if (entity->URI != NULL)
575	valuePush(ctxt, xmlXPathNewString(entity->URI));
576	else
577	valuePush(ctxt, xmlXPathNewString((const xmlChar *)""));
578	}
579	}
580	xmlXPathFreeObject(obj);
581	}
582
583	/**
584	* xsltFormatNumberFunction:
585	* @ctxt: the XPath Parser context
586	* @nargs: the number of arguments
587	*
588	* Implement the format-number() XSLT function
589	* string format-number(number, string, string?)
590	*/
591	void
592	xsltFormatNumberFunction(xmlXPathParserContextPtr ctxt, int nargs)
593	{
594	xmlXPathObjectPtr numberObj = NULL;
595	xmlXPathObjectPtr formatObj = NULL;
596	xmlXPathObjectPtr decimalObj = NULL;
597	xsltStylesheetPtr sheet;
598	xsltDecimalFormatPtr formatValues;
599	xmlChar *result;
600	xsltTransformContextPtr tctxt;
601
602	tctxt = xsltXPathGetTransformContext(ctxt);
603	if (tctxt == NULL)
604	return;
605	sheet = tctxt->style;
606	if (sheet == NULL)
607	return;
608	formatValues = sheet->decimalFormat;
609
610	switch (nargs) {
611	case 3:
612	CAST_TO_STRING;
613	decimalObj = valuePop(ctxt);
614	formatValues = xsltDecimalFormatGetByName(sheet, decimalObj->stringval);
615	if (formatValues == NULL) {
616	xsltTransformError(tctxt, NULL, NULL,
617	"format-number() : undeclared decimal format '%s'\n",
618	decimalObj->stringval);
619	}
620	/* Intentional fall-through */
621	case 2:
622	CAST_TO_STRING;
623	formatObj = valuePop(ctxt);
624	CAST_TO_NUMBER;
625	numberObj = valuePop(ctxt);
626	break;
627	default:
628	XP_ERROR(XPATH_INVALID_ARITY);
629	}
630
631	if (formatValues != NULL) {
632	if (xsltFormatNumberConversion(formatValues,
633	formatObj->stringval,
634	numberObj->floatval,
635	&result) == XPATH_EXPRESSION_OK) {
636	valuePush(ctxt, xmlXPathNewString(result));
637	xmlFree(result);
638	}
639	}
640
641	xmlXPathFreeObject(numberObj);
642	xmlXPathFreeObject(formatObj);
643	xmlXPathFreeObject(decimalObj);
644	}
645
646	/**
647	* xsltGenerateIdFunction:
648	* @ctxt: the XPath Parser context
649	* @nargs: the number of arguments
650	*
651	* Implement the generate-id() XSLT function
652	* string generate-id(node-set?)
653	*/
654	void
655	xsltGenerateIdFunction(xmlXPathParserContextPtr ctxt, int nargs){
656	xmlNodePtr cur = NULL;
657	unsigned long val;
658	xmlChar str[20];
659
660	if (nargs == 0) {
661	cur = ctxt->context->node;
662	} else if (nargs == 1) {
663	xmlXPathObjectPtr obj;
664	xmlNodeSetPtr nodelist;
665	int i, ret;
666
667	if ((ctxt->value == NULL) \|\| (ctxt->value->type != XPATH_NODESET)) {
668	ctxt->error = XPATH_INVALID_TYPE;
669	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
670	"generate-id() : invalid arg expecting a node-set\n");
671	return;
672	}
673	obj = valuePop(ctxt);
674	nodelist = obj->nodesetval;
675	if ((nodelist == NULL) \|\| (nodelist->nodeNr <= 0)) {
676	xmlXPathFreeObject(obj);
677	valuePush(ctxt, xmlXPathNewCString(""));
678	return;
679	}
680	cur = nodelist->nodeTab[0];
681	for (i = 1;i < nodelist->nodeNr;i++) {
682	ret = xmlXPathCmpNodes(cur, nodelist->nodeTab[i]);
683	if (ret == -1)
684	cur = nodelist->nodeTab[i];
685	}
686	xmlXPathFreeObject(obj);
687	} else {
688	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
689	"generate-id() : invalid number of args %d\n", nargs);
690	ctxt->error = XPATH_INVALID_ARITY;
691	return;
692	}
693	/*
694	* Okay this is ugly but should work, use the NodePtr address
695	* to forge the ID
696	*/
697	val = (unsigned long)((char )cur - (char )0);
698	val /= sizeof(xmlNode);
699	sprintf((char *)str, "id%ld", val);
700	valuePush(ctxt, xmlXPathNewString(str));
701	}
702
703	/**
704	* xsltSystemPropertyFunction:
705	* @ctxt: the XPath Parser context
706	* @nargs: the number of arguments
707	*
708	* Implement the system-property() XSLT function
709	* object system-property(string)
710	*/
711	void
712	xsltSystemPropertyFunction(xmlXPathParserContextPtr ctxt, int nargs){
713	xmlXPathObjectPtr obj;
714	xmlChar prefix, name;
715	const xmlChar *nsURI = NULL;
716
717	if (nargs != 1) {
718	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
719	"system-property() : expects one string arg\n");
720	ctxt->error = XPATH_INVALID_ARITY;
721	return;
722	}
723	if ((ctxt->value == NULL) \|\| (ctxt->value->type != XPATH_STRING)) {
724	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
725	"system-property() : invalid arg expecting a string\n");
726	ctxt->error = XPATH_INVALID_TYPE;
727	return;
728	}
729	obj = valuePop(ctxt);
730	if (obj->stringval == NULL) {
731	valuePush(ctxt, xmlXPathNewString((const xmlChar *)""));
732	} else {
733	name = xmlSplitQName2(obj->stringval, &prefix);
734	if (name == NULL) {
735	name = xmlStrdup(obj->stringval);
736	} else {
737	nsURI = xmlXPathNsLookup(ctxt->context, prefix);
738	if (nsURI == NULL) {
739	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
740	"system-property() : prefix %s is not bound\n", prefix);
741	}
742	}
743
744	if (xmlStrEqual(nsURI, XSLT_NAMESPACE)) {
745	#ifdef DOCBOOK_XSL_HACK
746	if (xmlStrEqual(name, (const xmlChar *)"vendor")) {
747	xsltStylesheetPtr sheet;
748	xsltTransformContextPtr tctxt;
749
750	tctxt = xsltXPathGetTransformContext(ctxt);
751	if ((tctxt != NULL) && (tctxt->inst != NULL) &&
752	(xmlStrEqual(tctxt->inst->name, BAD_CAST "variable")) &&
753	(tctxt->inst->parent != NULL) &&
754	(xmlStrEqual(tctxt->inst->parent->name,
755	BAD_CAST "template")))
756	sheet = tctxt->style;
757	else
758	sheet = NULL;
759	if ((sheet != NULL) && (sheet->doc != NULL) &&
760	(sheet->doc->URL != NULL) &&
761	(xmlStrstr(sheet->doc->URL,
762	(const xmlChar *)"chunk") != NULL)) {
763	valuePush(ctxt, xmlXPathNewString(
764	(const xmlChar *)"libxslt (SAXON 6.2 compatible)"));
765
766	} else {
767	valuePush(ctxt, xmlXPathNewString(
768	(const xmlChar *)XSLT_DEFAULT_VENDOR));
769	}
770	} else
771	#else
772	if (xmlStrEqual(name, (const xmlChar *)"vendor")) {
773	valuePush(ctxt, xmlXPathNewString(
774	(const xmlChar *)XSLT_DEFAULT_VENDOR));
775	} else
776	#endif
777	if (xmlStrEqual(name, (const xmlChar *)"version")) {
778	valuePush(ctxt, xmlXPathNewString(
779	(const xmlChar *)XSLT_DEFAULT_VERSION));
780	} else if (xmlStrEqual(name, (const xmlChar *)"vendor-url")) {
781	valuePush(ctxt, xmlXPathNewString(
782	(const xmlChar *)XSLT_DEFAULT_URL));
783	} else {
784	valuePush(ctxt, xmlXPathNewString((const xmlChar *)""));
785	}
786	}
787	if (name != NULL)
788	xmlFree(name);
789	if (prefix != NULL)
790	xmlFree(prefix);
791	}
792	xmlXPathFreeObject(obj);
793	}
794
795	/**
796	* xsltElementAvailableFunction:
797	* @ctxt: the XPath Parser context
798	* @nargs: the number of arguments
799	*
800	* Implement the element-available() XSLT function
801	* boolean element-available(string)
802	*/
803	void
804	xsltElementAvailableFunction(xmlXPathParserContextPtr ctxt, int nargs){
805	xmlXPathObjectPtr obj;
806	xmlChar prefix, name;
807	const xmlChar *nsURI = NULL;
808	xsltTransformContextPtr tctxt;
809
810	if (nargs != 1) {
811	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
812	"element-available() : expects one string arg\n");
813	ctxt->error = XPATH_INVALID_ARITY;
814	return;
815	}
816	if ((ctxt->value == NULL) \|\| (ctxt->value->type != XPATH_STRING)) {
817	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
818	"element-available() : invalid arg expecting a string\n");
819	ctxt->error = XPATH_INVALID_TYPE;
820	return;
821	}
822	obj = valuePop(ctxt);
823	tctxt = xsltXPathGetTransformContext(ctxt);
824	if (tctxt == NULL) {
825	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
826	"element-available() : internal error tctxt == NULL\n");
827	xmlXPathFreeObject(obj);
828	valuePush(ctxt, xmlXPathNewBoolean(0));
829	return;
830	}
831
832
833	name = xmlSplitQName2(obj->stringval, &prefix);
834	if (name == NULL) {
835	xmlNsPtr ns;
836
837	name = xmlStrdup(obj->stringval);
838	ns = xmlSearchNs(tctxt->inst->doc, tctxt->inst, NULL);
839	if (ns != NULL) nsURI = xmlStrdup(ns->href);
840	} else {
841	nsURI = xmlXPathNsLookup(ctxt->context, prefix);
842	if (nsURI == NULL) {
843	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
844	"element-available() : prefix %s is not bound\n", prefix);
845	}
846	}
847
848	if (xsltExtElementLookup(tctxt, name, nsURI) != NULL) {
849	valuePush(ctxt, xmlXPathNewBoolean(1));
850	} else {
851	valuePush(ctxt, xmlXPathNewBoolean(0));
852	}
853
854	xmlXPathFreeObject(obj);
855	if (name != NULL)
856	xmlFree(name);
857	if (prefix != NULL)
858	xmlFree(prefix);
859	}
860
861	/**
862	* xsltFunctionAvailableFunction:
863	* @ctxt: the XPath Parser context
864	* @nargs: the number of arguments
865	*
866	* Implement the function-available() XSLT function
867	* boolean function-available(string)
868	*/
869	void
870	xsltFunctionAvailableFunction(xmlXPathParserContextPtr ctxt, int nargs){
871	xmlXPathObjectPtr obj;
872	xmlChar prefix, name;
873	const xmlChar *nsURI = NULL;
874
875	if (nargs != 1) {
876	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
877	"function-available() : expects one string arg\n");
878	ctxt->error = XPATH_INVALID_ARITY;
879	return;
880	}
881	if ((ctxt->value == NULL) \|\| (ctxt->value->type != XPATH_STRING)) {
882	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
883	"function-available() : invalid arg expecting a string\n");
884	ctxt->error = XPATH_INVALID_TYPE;
885	return;
886	}
887	obj = valuePop(ctxt);
888
889	name = xmlSplitQName2(obj->stringval, &prefix);
890	if (name == NULL) {
891	name = xmlStrdup(obj->stringval);
892	} else {
893	nsURI = xmlXPathNsLookup(ctxt->context, prefix);
894	if (nsURI == NULL) {
895	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
896	"function-available() : prefix %s is not bound\n", prefix);
897	}
898	}
899
900	if (xmlXPathFunctionLookupNS(ctxt->context, name, nsURI) != NULL) {
901	valuePush(ctxt, xmlXPathNewBoolean(1));
902	} else {
903	valuePush(ctxt, xmlXPathNewBoolean(0));
904	}
905
906	xmlXPathFreeObject(obj);
907	if (name != NULL)
908	xmlFree(name);
909	if (prefix != NULL)
910	xmlFree(prefix);
911	}
912
913	/**
914	* xsltCurrentFunction:
915	* @ctxt: the XPath Parser context
916	* @nargs: the number of arguments
917	*
918	* Implement the current() XSLT function
919	* node-set current()
920	*/
921	static void
922	xsltCurrentFunction(xmlXPathParserContextPtr ctxt, int nargs){
923	xsltTransformContextPtr tctxt;
924
925	if (nargs != 0) {
926	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
927	"current() : function uses no argument\n");
928	ctxt->error = XPATH_INVALID_ARITY;
929	return;
930	}
931	tctxt = xsltXPathGetTransformContext(ctxt);
932	if (tctxt == NULL) {
933	xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
934	"current() : internal error tctxt == NULL\n");
935	valuePush(ctxt, xmlXPathNewNodeSet(NULL));
936	} else {
937	valuePush(ctxt, xmlXPathNewNodeSet(tctxt->node)); /* current */
938	}
939	}
940
941	/************************************************************************
942	* *
943	* Registration of XSLT and libxslt functions *
944	* *
945	************************************************************************/
946
947	/**
948	* xsltRegisterAllFunctions:
949	* @ctxt: the XPath context
950	*
951	* Registers all default XSLT functions in this context
952	*/
953	void
954	xsltRegisterAllFunctions(xmlXPathContextPtr ctxt)
955	{
956	xmlXPathRegisterFunc(ctxt, (const xmlChar *) "current",
957	xsltCurrentFunction);
958	xmlXPathRegisterFunc(ctxt, (const xmlChar *) "document",
959	xsltDocumentFunction);
960	xmlXPathRegisterFunc(ctxt, (const xmlChar *) "key", xsltKeyFunction);
961	xmlXPathRegisterFunc(ctxt, (const xmlChar *) "unparsed-entity-uri",
962	xsltUnparsedEntityURIFunction);
963	xmlXPathRegisterFunc(ctxt, (const xmlChar *) "format-number",
964	xsltFormatNumberFunction);
965	xmlXPathRegisterFunc(ctxt, (const xmlChar *) "generate-id",
966	xsltGenerateIdFunction);
967	xmlXPathRegisterFunc(ctxt, (const xmlChar *) "system-property",
968	xsltSystemPropertyFunction);
969	xmlXPathRegisterFunc(ctxt, (const xmlChar *) "element-available",
970	xsltElementAvailableFunction);
971	xmlXPathRegisterFunc(ctxt, (const xmlChar *) "function-available",
972	xsltFunctionAvailableFunction);
973	}

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source: vbox/trunk/src/libs/libxslt-1.1.22/libxslt/functions.c@ 14437

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