libxslt.c@ 37649

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Added libxslt-1.1.22 sources.
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1	/*
2	libxslt.c: this modules implements the main part of the glue of the
3	* libxslt library and the Python interpreter. It provides the
4	* entry points where an automatically generated stub is either
5	* unpractical or would not match cleanly the Python model.
6	*
7	* If compiled with MERGED_MODULES, the entry point will be used to
8	* initialize both the libxml2 and the libxslt wrappers
9	*
10	* See Copyright for the status of this software.
11	*
12	* [email protected]
13	*/
14	#include <Python.h>
15	/* #include "config.h" */
16	#include <libxml/xmlmemory.h>
17	#include <libxml/tree.h>
18	#include <libxml/xpath.h>
19	#include "libexslt/exslt.h"
20	#include "libxslt_wrap.h"
21	#include "libxslt-py.h"
22
23	#include <stdio.h>
24
25	#if (defined(_MSC_VER) \|\| defined(__MINGW32__)) && !defined(vsnprintf)
26	#define vsnprintf(b,c,f,a) _vsnprintf(b,c,f,a)
27	#elif defined(XSLT_NEED_TRIO)
28	#include "trio.h"
29	#define vsnprintf trio_vsnprintf
30	#endif
31
32	/* #define DEBUG */
33	/* #define DEBUG_XPATH */
34	/* #define DEBUG_ERROR */
35	/* #define DEBUG_MEMORY */
36	/* #define DEBUG_EXTENSIONS */
37	/* #define DEBUG_EXTENSIONS */
38
39	void initlibxsltmod(void);
40
41	/************************************************************************
42	* *
43	* Per type specific glue *
44	* *
45	************************************************************************/
46
47	PyObject *
48	libxslt_xsltStylesheetPtrWrap(xsltStylesheetPtr style) {
49	PyObject *ret;
50
51	#ifdef DEBUG
52	printf("libxslt_xsltStylesheetPtrWrap: style = %p\n", style);
53	#endif
54	if (style == NULL) {
55	Py_INCREF(Py_None);
56	return(Py_None);
57	}
58	ret = PyCObject_FromVoidPtrAndDesc((void *) style,
59	(char *)"xsltStylesheetPtr", NULL);
60
61	return(ret);
62	}
63
64	PyObject *
65	libxslt_xsltTransformContextPtrWrap(xsltTransformContextPtr ctxt) {
66	PyObject *ret;
67
68	#ifdef DEBUG
69	printf("libxslt_xsltTransformContextPtrWrap: ctxt = %p\n", ctxt);
70	#endif
71	if (ctxt == NULL) {
72	Py_INCREF(Py_None);
73	return(Py_None);
74	}
75	ret = PyCObject_FromVoidPtrAndDesc((void *) ctxt,
76	(char *)"xsltTransformContextPtr", NULL);
77	return(ret);
78	}
79
80	PyObject *
81	libxslt_xsltElemPreCompPtrWrap(xsltElemPreCompPtr ctxt) {
82	PyObject *ret;
83
84	#ifdef DEBUG
85	printf("libxslt_xsltElemPreCompPtrWrap: ctxt = %p\n", ctxt);
86	#endif
87	if (ctxt == NULL) {
88	Py_INCREF(Py_None);
89	return(Py_None);
90	}
91	ret = PyCObject_FromVoidPtrAndDesc((void *) ctxt,
92	(char *)"xsltElemPreCompPtr", NULL);
93	return(ret);
94	}
95
96	PyObject *
97	libxslt_xsltGetTransformContextHashCode(PyObject self ATTRIBUTE_UNUSED, PyObject args) {
98	PyObject *py_tctxt;
99	PyObject *ret;
100	long hash_code;
101	xsltTransformContextPtr tctxt;
102
103	if (!PyArg_ParseTuple(args, (char *)"O:getTransformContextHashCode",
104	&py_tctxt))
105	return NULL;
106
107	tctxt = (xsltTransformContextPtr) PytransformCtxt_Get(py_tctxt);
108	hash_code = (long) tctxt;
109
110	ret = PyInt_FromLong(hash_code);
111	return ret;
112	}
113
114	PyObject *
115	libxslt_xsltCompareTransformContextsEqual(PyObject self ATTRIBUTE_UNUSED, PyObject args) {
116
117	PyObject py_tctxt1, py_tctxt2;
118	xsltTransformContextPtr tctxt1, tctxt2;
119
120	if (!PyArg_ParseTuple(args, (char *)"OO:compareTransformContextsEqual",
121	&py_tctxt1, &py_tctxt2))
122	return NULL;
123
124	tctxt1 = (xsltTransformContextPtr) PytransformCtxt_Get(py_tctxt1);
125	tctxt2 = (xsltTransformContextPtr) PytransformCtxt_Get(py_tctxt2);
126
127	if ( tctxt1 == tctxt2 )
128	return Py_BuildValue((char *)"i", 1);
129	else
130	return Py_BuildValue((char *)"i", 0);
131	}
132
133	PyObject *
134	libxslt_xsltGetStylesheetHashCode(PyObject self ATTRIBUTE_UNUSED, PyObject args) {
135	PyObject *py_style;
136	PyObject *ret;
137	long hash_code;
138	xsltStylesheetPtr style;
139
140	if (!PyArg_ParseTuple(args, (char *)"O:getStylesheetHashCode",
141	&py_style))
142	return NULL;
143
144	style = (xsltStylesheetPtr) Pystylesheet_Get(py_style);
145	hash_code = (long) style;
146
147	ret = PyInt_FromLong(hash_code);
148	return ret;
149	}
150
151
152	PyObject *
153	libxslt_xsltCompareStylesheetsEqual(PyObject self ATTRIBUTE_UNUSED, PyObject args) {
154
155	PyObject py_style1, py_style2;
156	xsltStylesheetPtr style1, style2;
157
158	if (!PyArg_ParseTuple(args, (char *)"OO:compareStylesheetsEqual",
159	&py_style1, &py_style2))
160	return NULL;
161
162	style1 = (xsltStylesheetPtr) Pystylesheet_Get(py_style1);
163	style2 = (xsltStylesheetPtr) Pystylesheet_Get(py_style2);
164
165	if ( style1 == style2 )
166	return Py_BuildValue((char *)"i", 1);
167	else
168	return Py_BuildValue((char *)"i", 0);
169	}
170
171	/************************************************************************
172	* *
173	* Extending the API *
174	* *
175	************************************************************************/
176
177	static xmlHashTablePtr libxslt_extModuleFunctions = NULL;
178	static xmlHashTablePtr libxslt_extModuleElements = NULL;
179	static xmlHashTablePtr libxslt_extModuleElementPreComp = NULL;
180
181	static void
182	deallocateCallback(void payload, xmlChar name ATTRIBUTE_UNUSED) {
183	PyObject function = (PyObject ) payload;
184
185	#ifdef DEBUG_EXTENSIONS
186	printf("deallocateCallback(%s) called\n", name);
187	#endif
188
189	Py_XDECREF(function);
190	}
191
192	static void
193	deallocateClasse(void payload, xmlChar name ATTRIBUTE_UNUSED) {
194	PyObject class = (PyObject ) payload;
195
196	#ifdef DEBUG_EXTENSIONS
197	printf("deallocateClasse(%s) called\n", name);
198	#endif
199
200	Py_XDECREF(class);
201	}
202
203
204	/**
205	* libxslt_xsltElementPreCompCallback
206	* @style: the stylesheet
207	* @inst: the instruction in the stylesheet
208	*
209	* Callback for preprocessing of a custom element
210	*/
211	static xsltElemPreCompPtr
212	libxslt_xsltElementPreCompCallback(xsltStylesheetPtr style, xmlNodePtr inst,
213	xsltTransformFunction function) {
214	xsltElemPreCompPtr ret;
215	const xmlChar *name;
216	PyObject *args;
217	PyObject *result;
218	PyObject *pyobj_element_f;
219	PyObject *pyobj_precomp_f;
220
221	const xmlChar *ns_uri;
222
223
224	#ifdef DEBUG_EXTENSIONS
225	printf("libxslt_xsltElementPreCompCallback called\n");
226	#endif
227
228	if (style == NULL) {
229	xsltTransformError(NULL, NULL, inst,
230	"libxslt_xsltElementPreCompCallback: no transformation context\n");
231	return (NULL);
232	}
233
234	if (inst == NULL) {
235	xsltTransformError(NULL, style, inst,
236	"libxslt_xsltElementPreCompCallback: no instruction\n");
237	if (style != NULL) style->errors++;
238	return (NULL);
239	}
240
241	if (style == NULL)
242	return (NULL);
243
244	if (inst != NULL && inst->ns != NULL) {
245	name = inst->name;
246	ns_uri = inst->ns->href;
247	} else {
248	xsltTransformError(NULL, style, inst,
249	"libxslt_xsltElementPreCompCallback: internal error bad parameter\n");
250	printf("libxslt_xsltElementPreCompCallback: internal error bad parameter\n");
251	if (style != NULL) style->errors++;
252	return (NULL);
253	}
254
255	/*
256	* Find the functions, they should be there it was there at lookup
257	*/
258	pyobj_precomp_f = xmlHashLookup2(libxslt_extModuleElementPreComp,
259	name, ns_uri);
260	if (pyobj_precomp_f == NULL) {
261	xsltTransformError(NULL, style, inst,
262	"libxslt_xsltElementPreCompCallback: internal error, could not find precompile python function!\n");
263	if (style != NULL) style->errors++;
264	return (NULL);
265	}
266
267	pyobj_element_f = xmlHashLookup2(libxslt_extModuleElements,
268	name, ns_uri);
269	if (pyobj_element_f == NULL) {
270	xsltTransformError(NULL, style, inst,
271	"libxslt_xsltElementPreCompCallback: internal error, could not find element python function!\n");
272	if (style != NULL) style->errors++;
273	return (NULL);
274	}
275
276	args = Py_BuildValue((char *)"(OOO)",
277	libxslt_xsltStylesheetPtrWrap(style),
278	libxml_xmlNodePtrWrap(inst),
279	pyobj_element_f);
280
281	Py_INCREF(pyobj_precomp_f); /* Protect refcount against reentrant manipulation of callback hash */
282	result = PyEval_CallObject(pyobj_precomp_f, args);
283	Py_DECREF(pyobj_precomp_f);
284	Py_DECREF(args);
285
286	/* FIXME allow callbacks to return meaningful information to modify compile process */
287	/* If error, do we need to check the result and throw exception? */
288
289	Py_XDECREF(result);
290
291	ret = xsltNewElemPreComp (style, inst, function);
292	return (ret);
293	}
294
295
296	static void
297	libxslt_xsltElementTransformCallback(xsltTransformContextPtr ctxt,
298	xmlNodePtr node,
299	xmlNodePtr inst,
300	xsltElemPreCompPtr comp)
301	{
302	PyObject args, result;
303	PyObject *func = NULL;
304	const xmlChar *name;
305	const xmlChar *ns_uri;
306
307	if (ctxt == NULL)
308	return;
309
310	if (inst != NULL && inst->name != NULL && inst->ns != NULL && inst->ns->href != NULL) {
311	name = inst->name;
312	ns_uri = inst->ns->href;
313	} else {
314	printf("libxslt_xsltElementTransformCallback: internal error bad parameter\n");
315	return;
316	}
317
318	#ifdef DEBUG_EXTENSIONS
319	printf("libxslt_xsltElementTransformCallback called name %s URI %s\n", name, ns_uri);
320	#endif
321
322	/*
323	* Find the function, it should be there it was there at lookup
324	*/
325	func = xmlHashLookup2(libxslt_extModuleElements,
326	name, ns_uri);
327	if (func == NULL) {
328	printf("libxslt_xsltElementTransformCallback: internal error %s not found !\n",
329	name);
330	return;
331	}
332
333	args = Py_BuildValue((char *)"OOOO",
334	libxslt_xsltTransformContextPtrWrap(ctxt),
335	libxml_xmlNodePtrWrap(node),
336	libxml_xmlNodePtrWrap(inst),
337	libxslt_xsltElemPreCompPtrWrap(comp));
338
339	Py_INCREF(func); /* Protect refcount against reentrant manipulation of callback hash */
340	result = PyEval_CallObject(func, args);
341	Py_DECREF(func);
342	Py_DECREF(args);
343
344	/* FIXME Check result of callobject and set exception if fail */
345
346	Py_XDECREF(result);
347	}
348
349	PyObject *
350	libxslt_xsltRegisterExtModuleElement(PyObject *self ATTRIBUTE_UNUSED,
351	PyObject *args) {
352	PyObject *py_retval;
353	int ret = 0;
354	xmlChar *name;
355	xmlChar *ns_uri;
356	PyObject *pyobj_element_f;
357	PyObject *pyobj_precomp_f;
358
359	#ifdef DEBUG_EXTENSIONS
360	printf("libxslt_xsltRegisterExtModuleElement called\n",
361	name, ns_uri);
362	#endif
363
364	if (!PyArg_ParseTuple(args, (char *)"szOO:registerExtModuleElement",
365	&name, &ns_uri, &pyobj_precomp_f, &pyobj_element_f))
366	return(NULL);
367
368	if ((name == NULL) \|\| (pyobj_element_f == NULL) \|\| (pyobj_precomp_f == NULL)) {
369	py_retval = libxml_intWrap(-1);
370	return(py_retval);
371	}
372
373	#ifdef DEBUG_EXTENSIONS
374	printf("libxslt_xsltRegisterExtModuleElement(%s, %s) called\n",
375	name, ns_uri);
376	#endif
377
378	if (libxslt_extModuleElements == NULL)
379	libxslt_extModuleElements = xmlHashCreate(10);
380
381	if (libxslt_extModuleElementPreComp == NULL)
382	libxslt_extModuleElementPreComp = xmlHashCreate(10);
383
384	if (libxslt_extModuleElements == NULL \|\| libxslt_extModuleElementPreComp == NULL) {
385	py_retval = libxml_intWrap(-1);
386	return(py_retval);
387	}
388
389	ret = xmlHashAddEntry2(libxslt_extModuleElements, name, ns_uri, pyobj_element_f);
390	if (ret != 0) {
391	py_retval = libxml_intWrap(-1);
392	return(py_retval);
393	}
394	Py_XINCREF(pyobj_element_f);
395
396	ret = xmlHashAddEntry2(libxslt_extModuleElementPreComp, name, ns_uri, pyobj_precomp_f);
397	if (ret != 0) {
398	xmlHashRemoveEntry2(libxslt_extModuleElements, name, ns_uri, deallocateCallback);
399	py_retval = libxml_intWrap(-1);
400	return(py_retval);
401	}
402	Py_XINCREF(pyobj_precomp_f);
403
404	ret = xsltRegisterExtModuleElement(name, ns_uri,
405	libxslt_xsltElementPreCompCallback,
406	libxslt_xsltElementTransformCallback);
407	py_retval = libxml_intWrap((int) ret);
408	return(py_retval);
409	}
410	static void
411	libxslt_xmlXPathFuncCallback(xmlXPathParserContextPtr ctxt, int nargs) {
412	PyObject list, cur, *result;
413	xmlXPathObjectPtr obj;
414	xmlXPathContextPtr rctxt;
415	PyObject *current_function = NULL;
416	const xmlChar *name;
417	const xmlChar *ns_uri;
418	int i;
419
420	if (ctxt == NULL)
421	return;
422	rctxt = ctxt->context;
423	if (rctxt == NULL)
424	return;
425	name = rctxt->function;
426	ns_uri = rctxt->functionURI;
427	#ifdef DEBUG_XPATH
428	printf("libxslt_xmlXPathFuncCallback called name %s URI %s\n", name, ns_uri);
429	#endif
430
431	/*
432	* Find the function, it should be there it was there at lookup
433	*/
434	current_function = xmlHashLookup2(libxslt_extModuleFunctions,
435	name, ns_uri);
436	if (current_function == NULL) {
437	printf("libxslt_xmlXPathFuncCallback: internal error %s not found !\n",
438	name);
439	return;
440	}
441
442	list = PyTuple_New(nargs + 1);
443	PyTuple_SetItem(list, 0, libxml_xmlXPathParserContextPtrWrap(ctxt));
444	for (i = nargs - 1;i >= 0;i--) {
445	obj = valuePop(ctxt);
446	cur = libxml_xmlXPathObjectPtrWrap(obj);
447	PyTuple_SetItem(list, i + 1, cur);
448	}
449
450	Py_INCREF(current_function);
451	result = PyEval_CallObject(current_function, list);
452	Py_DECREF(current_function);
453	Py_DECREF(list);
454
455	/* Check for null in case of exception */
456	if (result != NULL) {
457	obj = libxml_xmlXPathObjectPtrConvert(result);
458	valuePush(ctxt, obj);
459	}
460	}
461
462	PyObject *
463	libxslt_xsltRegisterExtModuleFunction(PyObject *self ATTRIBUTE_UNUSED,
464	PyObject *args) {
465	PyObject *py_retval;
466	int ret = 0;
467	xmlChar *name;
468	xmlChar *ns_uri;
469	PyObject *pyobj_f;
470
471	if (!PyArg_ParseTuple(args, (char *)"szO:registerExtModuleFunction",
472	&name, &ns_uri, &pyobj_f))
473	return(NULL);
474
475	if ((name == NULL) \|\| (pyobj_f == NULL)) {
476	py_retval = libxml_intWrap(-1);
477	return(py_retval);
478	}
479
480	#ifdef DEBUG_XPATH
481	printf("libxslt_xsltRegisterExtModuleFunction(%s, %s) called\n",
482	name, ns_uri);
483	#endif
484
485	if (libxslt_extModuleFunctions == NULL)
486	libxslt_extModuleFunctions = xmlHashCreate(10);
487	if (libxslt_extModuleFunctions == NULL) {
488	py_retval = libxml_intWrap(-1);
489	return(py_retval);
490	}
491	ret = xmlHashAddEntry2(libxslt_extModuleFunctions, name, ns_uri, pyobj_f);
492	if (ret != 0) {
493	py_retval = libxml_intWrap(-1);
494	return(py_retval);
495	}
496	Py_XINCREF(pyobj_f);
497
498	ret = xsltRegisterExtModuleFunction(name, ns_uri,
499	libxslt_xmlXPathFuncCallback);
500	py_retval = libxml_intWrap((int) ret);
501	return(py_retval);
502	}
503
504
505	/************************************************************************
506	* *
507	* Document loading front-ends *
508	* *
509	************************************************************************/
510
511	static PyObject *pythonDocLoaderObject = NULL;
512
513	static xmlDocPtr
514	pythonDocLoaderFuncWrapper(const xmlChar * URI, xmlDictPtr dict, int options,
515	void *ctxt ATTRIBUTE_UNUSED,
516	xsltLoadType type ATTRIBUTE_UNUSED)
517	{
518	xmlParserCtxtPtr pctxt;
519	xmlDocPtr doc=NULL;
520
521	pctxt = xmlNewParserCtxt();
522	if (pctxt == NULL)
523	return(NULL);
524	if ((dict != NULL) && (pctxt->dict != NULL)) {
525	xmlDictFree(pctxt->dict);
526	pctxt->dict = NULL;
527	}
528	if (dict != NULL) {
529	pctxt->dict = dict;
530	xmlDictReference(pctxt->dict);
531	#ifdef WITH_XSLT_DEBUG
532	xsltGenericDebug(xsltGenericDebugContext,
533	"Reusing dictionary for document\n");
534	#endif
535	}
536	xmlCtxtUseOptions(pctxt, options);
537
538	/*
539	* Now pass to python the URI, the xsltParserContext and the context
540	* (either a transformContext or a stylesheet) and get back an xmlDocPtr
541	*/
542	if (pythonDocLoaderObject != NULL) {
543	PyObject ctxtobj, pctxtobj, *result;
544	pctxtobj = libxml_xmlParserCtxtPtrWrap(pctxt);
545
546	if (type == XSLT_LOAD_DOCUMENT) {
547	ctxtobj = libxslt_xsltTransformContextPtrWrap(ctxt);
548	result = PyObject_CallFunction(pythonDocLoaderObject,
549	(char *) "(sOOi)", URI, pctxtobj, ctxtobj, 0);
550	}
551	else {
552	ctxtobj = libxslt_xsltStylesheetPtrWrap(ctxt);
553	result = PyObject_CallFunction(pythonDocLoaderObject,
554	(char *) "(sOOi)", URI, pctxtobj, ctxtobj, 1);
555	}
556
557	Py_XDECREF(pctxtobj);
558
559	if (result != NULL) {
560	/*
561	* The return value should be the document
562	* Should we test it somehow before getting the C object from it?
563	*/
564	PyObject py_doc = PyObject_GetAttrString(result, (char ) "_o");
565	doc = (xmlDocPtr) PyxmlNode_Get(py_doc);
566	/* do we have to DECCREF the result?? */
567	}
568	}
569
570	if (! pctxt->wellFormed) {
571	if (doc != NULL) {
572	xmlFreeDoc(doc);
573	doc = NULL;
574	}
575	if (pctxt->myDoc != NULL) {
576	xmlFreeDoc(pctxt->myDoc);
577	pctxt->myDoc = NULL;
578	}
579	}
580	/*
581	* xmlFreeParserCtxt(pctxt);
582	* libc complains about double free-ing with this line
583	*/
584
585	return(doc);
586	}
587
588
589	PyObject *
590	libxslt_xsltSetLoaderFunc(PyObject self ATTRIBUTE_UNUSED, PyObject args) {
591	PyObject *py_retval;
592	PyObject *loader;
593
594	if (!PyArg_ParseTuple(args, (char *)"O:libxslt_xsltSetLoaderFunc",
595	&loader))
596	return(NULL);
597
598	pythonDocLoaderObject = loader;
599	xsltSetLoaderFunc(pythonDocLoaderFuncWrapper);
600
601	py_retval = PyInt_FromLong(0);
602	return(py_retval);
603	}
604
605	PyObject *
606	libxslt_xsltGetLoaderFunc(void) {
607	PyObject *py_retval;
608
609	py_retval = pythonDocLoaderObject;
610	return(py_retval);
611	}
612
613
614	/************************************************************************
615	* *
616	* Some customized front-ends *
617	* *
618	************************************************************************/
619
620	PyObject *
621	libxslt_xsltNewTransformContext(PyObject self ATTRIBUTE_UNUSED, PyObject args) {
622	PyObject *py_retval;
623	PyObject *pyobj_style;
624	PyObject *pyobj_doc;
625	xsltStylesheetPtr style;
626	xmlDocPtr doc;
627	xsltTransformContextPtr c_retval;
628
629	if (!PyArg_ParseTuple(args, (char *) "OO:xsltNewTransformContext",
630	&pyobj_style, &pyobj_doc))
631	return(NULL);
632
633	style = (xsltStylesheetPtr) Pystylesheet_Get(pyobj_style);
634	doc = (xmlDocPtr) PyxmlNode_Get(pyobj_doc);
635
636	c_retval = xsltNewTransformContext(style, doc);
637	py_retval = libxslt_xsltTransformContextPtrWrap((xsltTransformContextPtr) c_retval);
638	return (py_retval);
639	}
640
641	PyObject *
642	libxslt_xsltFreeTransformContext(PyObject self ATTRIBUTE_UNUSED, PyObject args) {
643	PyObject *py_tctxt;
644	xsltTransformContextPtr tctxt;
645
646	if (!PyArg_ParseTuple(args, (char *) "O:xsltFreeTransformContext", &py_tctxt))
647	return(NULL);
648
649	tctxt = (xsltTransformContextPtr) PytransformCtxt_Get(py_tctxt);
650	xsltFreeTransformContext(tctxt);
651
652	/* Return None */
653	Py_INCREF(Py_None);
654	return(Py_None);
655	}
656
657	PyObject *
658	libxslt_xsltApplyStylesheetUser(PyObject self ATTRIBUTE_UNUSED, PyObject args) {
659	PyObject *py_retval;
660	xmlDocPtr c_retval;
661	xsltStylesheetPtr style;
662	PyObject *pyobj_style;
663	xmlDocPtr doc;
664	xsltTransformContextPtr transformCtxt;
665	PyObject *pyobj_doc;
666	PyObject *pyobj_params;
667	PyObject *pyobj_transformCtxt;
668	const char **params = NULL;
669	int len = 0, i = 0, j;
670	PyObject *name;
671	PyObject *value;
672
673	if (!PyArg_ParseTuple(args, (char *) "OOOO:xsltApplyStylesheetUser",
674	&pyobj_style, &pyobj_doc, &pyobj_params, &pyobj_transformCtxt))
675	return(NULL);
676
677	if (pyobj_params != Py_None) {
678	if (PyDict_Check(pyobj_params)) {
679	len = PyDict_Size(pyobj_params);
680	if (len > 0) {
681	params = (const char *) xmlMalloc((len + 1) 2 *
682	sizeof(char *));
683	if (params == NULL) {
684	printf("libxslt_xsltApplyStylesheet: out of memory\n");
685	Py_INCREF(Py_None);
686	return(Py_None);
687	}
688	j = 0;
689	while (PyDict_Next(pyobj_params, &i, &name, &value)) {
690	const char *tmp;
691	int size;
692
693	tmp = PyString_AS_STRING(name);
694	size = PyString_GET_SIZE(name);
695	params[j * 2] = (char *) xmlCharStrndup(tmp, size);
696	if (PyString_Check(value)) {
697	tmp = PyString_AS_STRING(value);
698	size = PyString_GET_SIZE(value);
699	params[(j * 2) + 1] = (char *)
700	xmlCharStrndup(tmp, size);
701	} else {
702	params[(j * 2) + 1] = NULL;
703	}
704	j = j + 1;
705	}
706	params[j * 2] = NULL;
707	params[(j * 2) + 1] = NULL;
708	}
709	} else {
710	printf("libxslt_xsltApplyStylesheet: parameters not a dict\n");
711	Py_INCREF(Py_None);
712	return(Py_None);
713	}
714	}
715	style = (xsltStylesheetPtr) Pystylesheet_Get(pyobj_style);
716	doc = (xmlDocPtr) PyxmlNode_Get(pyobj_doc);
717	transformCtxt = (xsltTransformContextPtr) PytransformCtxt_Get(pyobj_transformCtxt);
718
719	c_retval = xsltApplyStylesheetUser(style, doc, params, NULL, NULL, transformCtxt);
720	py_retval = libxml_xmlDocPtrWrap((xmlDocPtr) c_retval);
721	if (params != NULL) {
722	if (len > 0) {
723	for (i = 0;i < 2 * len;i++) {
724	if (params[i] != NULL)
725	xmlFree((char *)params[i]);
726	}
727	xmlFree(params);
728	}
729	}
730	return(py_retval);
731	}
732
733	PyObject *
734	libxslt_xsltApplyStylesheet(PyObject self ATTRIBUTE_UNUSED, PyObject args) {
735	PyObject *py_retval;
736	xmlDocPtr c_retval;
737	xsltStylesheetPtr style;
738	PyObject *pyobj_style;
739	xmlDocPtr doc;
740	PyObject *pyobj_doc;
741	PyObject *pyobj_params;
742	const char **params = NULL;
743	int len = 0, i = 0, j;
744	PyObject *name;
745	PyObject *value;
746
747	if (!PyArg_ParseTuple(args, (char *) "OOO:xsltApplyStylesheet",
748	&pyobj_style, &pyobj_doc, &pyobj_params))
749	return(NULL);
750
751	if (pyobj_params != Py_None) {
752	if (PyDict_Check(pyobj_params)) {
753	len = PyDict_Size(pyobj_params);
754	if (len > 0) {
755	params = (const char *) xmlMalloc((len + 1) 2 *
756	sizeof(char *));
757	if (params == NULL) {
758	printf("libxslt_xsltApplyStylesheet: out of memory\n");
759	Py_INCREF(Py_None);
760	return(Py_None);
761	}
762	j = 0;
763	while (PyDict_Next(pyobj_params, &i, &name, &value)) {
764	const char *tmp;
765	int size;
766
767	tmp = PyString_AS_STRING(name);
768	size = PyString_GET_SIZE(name);
769	params[j * 2] = (char *) xmlCharStrndup(tmp, size);
770	if (PyString_Check(value)) {
771	tmp = PyString_AS_STRING(value);
772	size = PyString_GET_SIZE(value);
773	params[(j * 2) + 1] = (char *)
774	xmlCharStrndup(tmp, size);
775	} else {
776	params[(j * 2) + 1] = NULL;
777	}
778	j = j + 1;
779	}
780	params[j * 2] = NULL;
781	params[(j * 2) + 1] = NULL;
782	}
783	} else {
784	printf("libxslt_xsltApplyStylesheet: parameters not a dict\n");
785	Py_INCREF(Py_None);
786	return(Py_None);
787	}
788	}
789	style = (xsltStylesheetPtr) Pystylesheet_Get(pyobj_style);
790	doc = (xmlDocPtr) PyxmlNode_Get(pyobj_doc);
791
792	c_retval = xsltApplyStylesheet(style, doc, params);
793	py_retval = libxml_xmlDocPtrWrap((xmlDocPtr) c_retval);
794	if (params != NULL) {
795	if (len > 0) {
796	for (i = 0;i < 2 * len;i++) {
797	if (params[i] != NULL)
798	xmlFree((char *)params[i]);
799	}
800	xmlFree(params);
801	}
802	}
803	return(py_retval);
804	}
805
806	PyObject *
807	libxslt_xsltSaveResultToString(PyObject self ATTRIBUTE_UNUSED, PyObject args) {
808	PyObject py_retval; / our final return value, a python string */
809	xmlChar *buffer;
810	int size = 0;
811	int emitted = 0;
812	xmlDocPtr result;
813	PyObject *pyobj_result;
814	xsltStylesheetPtr style;
815	PyObject *pyobj_style;
816
817	if (!PyArg_ParseTuple(args, (char *)"OO:xsltSaveResultToString", &pyobj_style, &pyobj_result))
818	goto FAIL;
819	result = (xmlDocPtr) PyxmlNode_Get(pyobj_result);
820	style = (xsltStylesheetPtr) Pystylesheet_Get(pyobj_style);
821
822
823	/* FIXME: We should probably add more restrictive error checking
824	* and raise an error instead of "just" returning NULL.
825	* FIXME: Documentation and code for xsltSaveResultToString diff
826	* -> emmitted will never be positive non-null.
827	*/
828	emitted = xsltSaveResultToString(&buffer, &size, result, style);
829	if(!buffer \|\| emitted < 0)
830	goto FAIL;
831	/* We haven't tested the aberrant case of a transformation that
832	* renders to an empty string. For now we try to play it save.
833	*/
834	if(size)
835	{
836	buffer[size] = '\0';
837	py_retval = PyString_FromString((char *) buffer);
838	xmlFree(buffer);
839	}
840	else
841	py_retval = PyString_FromString("");
842	return(py_retval);
843	FAIL:
844	return(0);
845	}
846
847
848	/************************************************************************
849	* *
850	* Error message callback *
851	* *
852	************************************************************************/
853
854	static PyObject *libxslt_xsltPythonErrorFuncHandler = NULL;
855	static PyObject *libxslt_xsltPythonErrorFuncCtxt = NULL;
856
857	static void
858	libxslt_xsltErrorFuncHandler(void ctx ATTRIBUTE_UNUSED, const char msg,
859	...)
860	{
861	int size;
862	int chars;
863	char *larger;
864	va_list ap;
865	char *str;
866	PyObject *list;
867	PyObject *message;
868	PyObject *result;
869
870	#ifdef DEBUG_ERROR
871	printf("libxslt_xsltErrorFuncHandler(%p, %s, ...) called\n", ctx, msg);
872	#endif
873
874
875	if (libxslt_xsltPythonErrorFuncHandler == NULL) {
876	va_start(ap, msg);
877	vfprintf(stderr, msg, ap);
878	va_end(ap);
879	} else {
880	str = (char *) xmlMalloc(150);
881	if (str == NULL)
882	return;
883
884	size = 150;
885
886	while (1) {
887	va_start(ap, msg);
888	chars = vsnprintf(str, size, msg, ap);
889	va_end(ap);
890	if ((chars > -1) && (chars < size))
891	break;
892	if (chars > -1)
893	size += chars + 1;
894	else
895	size += 100;
896	if ((larger = (char *) xmlRealloc(str, size)) == NULL) {
897	xmlFree(str);
898	return;
899	}
900	str = larger;
901	}
902
903	list = PyTuple_New(2);
904	PyTuple_SetItem(list, 0, libxslt_xsltPythonErrorFuncCtxt);
905	Py_XINCREF(libxslt_xsltPythonErrorFuncCtxt);
906	message = libxml_charPtrWrap(str);
907	PyTuple_SetItem(list, 1, message);
908	result = PyEval_CallObject(libxslt_xsltPythonErrorFuncHandler, list);
909	Py_XDECREF(list);
910	Py_XDECREF(result);
911	}
912	}
913
914	static void
915	libxslt_xsltErrorInitialize(void)
916	{
917	#ifdef DEBUG_ERROR
918	printf("libxslt_xsltErrorInitialize() called\n");
919	#endif
920	xmlSetGenericErrorFunc(NULL, libxslt_xsltErrorFuncHandler);
921	xsltSetGenericErrorFunc(NULL, libxslt_xsltErrorFuncHandler);
922	}
923
924	PyObject *
925	libxslt_xsltRegisterErrorHandler(PyObject * self ATTRIBUTE_UNUSED,
926	PyObject * args)
927	{
928	PyObject *py_retval;
929	PyObject *pyobj_f;
930	PyObject *pyobj_ctx;
931
932	if (!PyArg_ParseTuple
933	(args, (char *) "OO:xmlRegisterErrorHandler", &pyobj_f,
934	&pyobj_ctx))
935	return (NULL);
936
937	#ifdef DEBUG_ERROR
938	printf("libxml_registerXPathFunction(%p, %p) called\n", pyobj_ctx,
939	pyobj_f);
940	#endif
941
942	if (libxslt_xsltPythonErrorFuncHandler != NULL) {
943	Py_XDECREF(libxslt_xsltPythonErrorFuncHandler);
944	}
945	if (libxslt_xsltPythonErrorFuncCtxt != NULL) {
946	Py_XDECREF(libxslt_xsltPythonErrorFuncCtxt);
947	}
948
949	Py_XINCREF(pyobj_ctx);
950	Py_XINCREF(pyobj_f);
951
952	/* TODO: check f is a function ! */
953	libxslt_xsltPythonErrorFuncHandler = pyobj_f;
954	libxslt_xsltPythonErrorFuncCtxt = pyobj_ctx;
955
956	py_retval = libxml_intWrap(1);
957	return (py_retval);
958	}
959
960	/************************************************************************
961	* *
962	* Extension classes *
963	* *
964	************************************************************************/
965
966	static xmlHashTablePtr libxslt_extModuleClasses = NULL;
967
968	static void *
969	libxslt_xsltPythonExtModuleStyleInit(xsltStylesheetPtr style,
970	const xmlChar * URI) {
971	PyObject *result = NULL;
972	PyObject *class = NULL;
973
974	#ifdef DEBUG_EXTENSIONS
975	printf("libxslt_xsltPythonExtModuleStyleInit(%p, %s) called\n",
976	style, URI);
977	#endif
978
979	if ((style == NULL) \|\| (URI == NULL))
980	return(NULL);
981
982	/*
983	* Find the function, it should be there it was there at lookup
984	*/
985	class = xmlHashLookup(libxslt_extModuleClasses, URI);
986	if (class == NULL) {
987	fprintf(stderr, "libxslt_xsltPythonExtModuleStyleInit: internal error %s not found !\n", URI);
988	return(NULL);
989	}
990
991	if (PyObject_HasAttrString(class, (char *) "_styleInit")) {
992	result = PyObject_CallMethod(class, (char *) "_styleInit",
993	(char *) "Os", libxslt_xsltStylesheetPtrWrap(style), URI);
994	}
995	return((void *)result);
996	}
997	static void
998	libxslt_xsltPythonExtModuleStyleShutdown(xsltStylesheetPtr style,
999	const xmlChar * URI, void *data) {
1000	PyObject *class = NULL;
1001	PyObject *result;
1002
1003	#ifdef DEBUG_EXTENSIONS
1004	printf("libxslt_xsltPythonExtModuleStyleShutdown(%p, %s, %p) called\n",
1005	style, URI, data);
1006	#endif
1007
1008	if ((style == NULL) \|\| (URI == NULL))
1009	return;
1010
1011	/*
1012	* Find the function, it should be there it was there at lookup
1013	*/
1014	class = xmlHashLookup(libxslt_extModuleClasses, URI);
1015	if (class == NULL) {
1016	fprintf(stderr, "libxslt_xsltPythonExtModuleStyleShutdown: internal error %s not found !\n", URI);
1017	return;
1018	}
1019
1020	if (PyObject_HasAttrString(class, (char *) "_styleShutdown")) {
1021	result = PyObject_CallMethod(class, (char *) "_styleShutdown",
1022	(char *) "OsO", libxslt_xsltStylesheetPtrWrap(style),
1023	URI, (PyObject *) data);
1024	Py_XDECREF(result);
1025	Py_XDECREF((PyObject *)data);
1026	}
1027	}
1028
1029	static void *
1030	libxslt_xsltPythonExtModuleCtxtInit(xsltTransformContextPtr ctxt,
1031	const xmlChar * URI) {
1032	PyObject *result = NULL;
1033	PyObject *class = NULL;
1034
1035	#ifdef DEBUG_EXTENSIONS
1036	printf("libxslt_xsltPythonExtModuleCtxtInit(%p, %s) called\n",
1037	ctxt, URI);
1038	#endif
1039
1040	if ((ctxt == NULL) \|\| (URI == NULL))
1041	return(NULL);
1042
1043	/*
1044	* Find the function, it should be there it was there at lookup
1045	*/
1046	class = xmlHashLookup(libxslt_extModuleClasses, URI);
1047	if (class == NULL) {
1048	fprintf(stderr, "libxslt_xsltPythonExtModuleCtxtInit: internal error %s not found !\n", URI);
1049	return(NULL);
1050	}
1051
1052	if (PyObject_HasAttrString(class, (char *) "_ctxtInit")) {
1053	result = PyObject_CallMethod(class, (char *) "_ctxtInit",
1054	(char *) "Os", libxslt_xsltTransformContextPtrWrap(ctxt),
1055	URI);
1056	}
1057	return((void *)result);
1058	}
1059	static void
1060	libxslt_xsltPythonExtModuleCtxtShutdown(xsltTransformContextPtr ctxt,
1061	const xmlChar * URI, void *data) {
1062	PyObject *class = NULL;
1063	PyObject *result;
1064
1065	#ifdef DEBUG_EXTENSIONS
1066	printf("libxslt_xsltPythonExtModuleCtxtShutdown(%p, %s, %p) called\n",
1067	ctxt, URI, data);
1068	#endif
1069
1070	if ((ctxt == NULL) \|\| (URI == NULL))
1071	return;
1072
1073	/*
1074	* Find the function, it should be there it was there at lookup
1075	*/
1076	class = xmlHashLookup(libxslt_extModuleClasses, URI);
1077	if (class == NULL) {
1078	fprintf(stderr, "libxslt_xsltPythonExtModuleCtxtShutdown: internal error %s not found !\n", URI);
1079	return;
1080	}
1081
1082	if (PyObject_HasAttrString(class, (char *) "_ctxtShutdown")) {
1083	result = PyObject_CallMethod(class, (char *) "_ctxtShutdown",
1084	(char *) "OsO", libxslt_xsltTransformContextPtrWrap(ctxt),
1085	URI, (PyObject *) data);
1086	Py_XDECREF(result);
1087	Py_XDECREF((PyObject *)data);
1088	}
1089	}
1090
1091	PyObject *
1092	libxslt_xsltRegisterExtensionClass(PyObject *self ATTRIBUTE_UNUSED,
1093	PyObject *args) {
1094	PyObject *py_retval;
1095	int ret = 0;
1096	xmlChar *ns_uri;
1097	PyObject *pyobj_c;
1098
1099	if (!PyArg_ParseTuple(args, (char *)"zO:registerExtensionClass",
1100	&ns_uri, &pyobj_c))
1101	return(NULL);
1102
1103	if ((ns_uri == NULL) \|\| (pyobj_c == NULL)) {
1104	py_retval = libxml_intWrap(-1);
1105	return(py_retval);
1106	}
1107
1108	#ifdef DEBUG_EXTENSIONS
1109	printf("libxslt_xsltRegisterExtensionClass(%s) called\n", ns_uri);
1110	#endif
1111
1112	if (libxslt_extModuleClasses == NULL)
1113	libxslt_extModuleClasses = xmlHashCreate(10);
1114	if (libxslt_extModuleClasses == NULL) {
1115	py_retval = libxml_intWrap(-1);
1116	return(py_retval);
1117	}
1118	ret = xmlHashAddEntry(libxslt_extModuleClasses, ns_uri, pyobj_c);
1119	if (ret != 0) {
1120	py_retval = libxml_intWrap(-1);
1121	return(py_retval);
1122	}
1123	Py_XINCREF(pyobj_c);
1124
1125	ret = xsltRegisterExtModuleFull(ns_uri,
1126	(xsltExtInitFunction) libxslt_xsltPythonExtModuleCtxtInit,
1127	(xsltExtShutdownFunction) libxslt_xsltPythonExtModuleCtxtShutdown,
1128	(xsltStyleExtInitFunction) libxslt_xsltPythonExtModuleStyleInit,
1129	(xsltStyleExtShutdownFunction) libxslt_xsltPythonExtModuleStyleShutdown);
1130	py_retval = libxml_intWrap((int) ret);
1131	if (ret < 0) {
1132	Py_XDECREF(pyobj_c);
1133	}
1134	return(py_retval);
1135	}
1136
1137	/************************************************************************
1138	* *
1139	* Integrated cleanup *
1140	* *
1141	************************************************************************/
1142
1143	PyObject *
1144	libxslt_xsltPythonCleanup(PyObject *self ATTRIBUTE_UNUSED,
1145	PyObject *args ATTRIBUTE_UNUSED) {
1146
1147	if (libxslt_extModuleFunctions != NULL) {
1148	xmlHashFree(libxslt_extModuleFunctions, deallocateCallback);
1149	}
1150	if (libxslt_extModuleElements != NULL) {
1151	xmlHashFree(libxslt_extModuleElements, deallocateCallback);
1152	}
1153	if (libxslt_extModuleElementPreComp != NULL) {
1154	xmlHashFree(libxslt_extModuleElementPreComp, deallocateCallback);
1155	}
1156	if (libxslt_extModuleClasses != NULL) {
1157	xmlHashFree(libxslt_extModuleClasses, deallocateClasse);
1158	}
1159	xsltCleanupGlobals();
1160	Py_INCREF(Py_None);
1161	return(Py_None);
1162	}
1163
1164	/************************************************************************
1165	* *
1166	* The registration stuff *
1167	* *
1168	************************************************************************/
1169	static PyMethodDef libxsltMethods[] = {
1170	#include "libxslt-export.c"
1171	{ NULL, NULL, 0, NULL }
1172	};
1173
1174	#ifdef MERGED_MODULES
1175	extern void initlibxml2mod(void);
1176	#endif
1177
1178	void initlibxsltmod(void) {
1179	static int initialized = 0;
1180	PyObject *m;
1181
1182	#ifdef MERGED_MODULES
1183	initlibxml2mod();
1184	#endif
1185
1186	if (initialized != 0)
1187	return;
1188	m = Py_InitModule((char *)"libxsltmod", libxsltMethods);
1189	initialized = 1;
1190	/*
1191	* Specific XSLT initializations
1192	*/
1193	libxslt_xsltErrorInitialize();
1194	xmlInitMemory();
1195	xmlLoadExtDtdDefaultValue = XML_DETECT_IDS \| XML_COMPLETE_ATTRS;
1196	xmlDefaultSAXHandler.cdataBlock = NULL;
1197	/*
1198	* Register the EXSLT extensions and the test module
1199	*/
1200	exsltRegisterAll();
1201	}
1202
1203

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