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/*
* extensions.c: Implemetation of the extensions support
*
* Reference:
* http://www.w3.org/TR/1999/REC-xslt-19991116
*
* See Copyright for the status of this software.
*
* daniel@veillard.com
*/
#define IN_LIBXSLT
#include "libxslt.h"
#ifdef WITH_MODULES
#include <string.h>
#include <limits.h>
#include <libxml/xmlmemory.h>
#include <libxml/tree.h>
#include <libxml/hash.h>
#include <libxml/xmlerror.h>
#include <libxml/parserInternals.h>
#include <libxml/xpathInternals.h>
#include <libxml/list.h>
#include <libxml/xmlIO.h>
#include "xslt.h"
#include "xsltInternals.h"
#include "xsltutils.h"
#include "imports.h"
#include "extensions.h"
#define XSLT_TESTPLUGIN_URL "http://xmlsoft.org/xslt/testplugin"
/************************************************************************
* *
* Test plugin module http://xmlsoft.org/xslt/testplugin *
* *
************************************************************************/
/************************************************************************
* *
* Test of the extension module API *
* *
************************************************************************/
static xmlChar *testData = NULL;
static xmlChar *testStyleData = NULL;
/**
* xsltExtFunctionTest:
* @ctxt: the XPath Parser context
* @nargs: the number of arguments
*
* function libxslt:test() for testing the extensions support.
*/
static void
xsltExtFunctionTest(xmlXPathParserContextPtr ctxt,
int nargs ATTRIBUTE_UNUSED)
{
xsltTransformContextPtr tctxt;
void *data = NULL;
tctxt = xsltXPathGetTransformContext(ctxt);
if (testData == NULL) {
xsltGenericDebug(xsltGenericDebugContext,
"xsltExtFunctionTest: not initialized,"
" calling xsltGetExtData\n");
data = xsltGetExtData(tctxt, (const xmlChar *) XSLT_TESTPLUGIN_URL);
if (data == NULL) {
xsltTransformError(tctxt, NULL, NULL,
"xsltExtElementTest: not initialized\n");
return;
}
}
if (tctxt == NULL) {
xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
"xsltExtFunctionTest: failed to get the transformation context\n");
return;
}
if (data == NULL)
data = xsltGetExtData(tctxt, (const xmlChar *) XSLT_TESTPLUGIN_URL);
if (data == NULL) {
xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
"xsltExtFunctionTest: failed to get module data\n");
return;
}
if (data != testData) {
xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
"xsltExtFunctionTest: got wrong module data\n");
return;
}
#ifdef WITH_XSLT_DEBUG_FUNCTION
xsltGenericDebug(xsltGenericDebugContext,
"libxslt:test() called with %d args\n", nargs);
#endif
}
/**
* xsltExtElementPreCompTest:
* @style: the stylesheet
* @inst: the instruction in the stylesheet
*
* Process a libxslt:test node
*/
static xsltElemPreCompPtr
xsltExtElementPreCompTest(xsltStylesheetPtr style, xmlNodePtr inst,
xsltTransformFunction function)
{
xsltElemPreCompPtr ret;
if (style == NULL) {
xsltTransformError(NULL, NULL, inst,
"xsltExtElementTest: no transformation context\n");
return (NULL);
}
if (testStyleData == NULL) {
xsltGenericDebug(xsltGenericDebugContext,
"xsltExtElementPreCompTest: not initialized,"
" calling xsltStyleGetExtData\n");
xsltStyleGetExtData(style, (const xmlChar *) XSLT_TESTPLUGIN_URL);
if (testStyleData == NULL) {
xsltTransformError(NULL, style, inst,
"xsltExtElementPreCompTest: not initialized\n");
if (style != NULL)
style->errors++;
return (NULL);
}
}
if (inst == NULL) {
xsltTransformError(NULL, style, inst,
"xsltExtElementPreCompTest: no instruction\n");
if (style != NULL)
style->errors++;
return (NULL);
}
ret = xsltNewElemPreComp(style, inst, function);
return (ret);
}
/**
* xsltExtElementTest:
* @ctxt: an XSLT processing context
* @node: The current node
* @inst: the instruction in the stylesheet
* @comp: precomputed informations
*
* Process a libxslt:test node
*/
static void
xsltExtElementTest(xsltTransformContextPtr ctxt, xmlNodePtr node,
xmlNodePtr inst,
xsltElemPreCompPtr comp ATTRIBUTE_UNUSED)
{
xmlNodePtr commentNode;
if (testData == NULL) {
xsltGenericDebug(xsltGenericDebugContext,
"xsltExtElementTest: not initialized,"
" calling xsltGetExtData\n");
xsltGetExtData(ctxt, (const xmlChar *) XSLT_TESTPLUGIN_URL);
if (testData == NULL) {
xsltTransformError(ctxt, NULL, inst,
"xsltExtElementTest: not initialized\n");
return;
}
}
if (ctxt == NULL) {
xsltTransformError(ctxt, NULL, inst,
"xsltExtElementTest: no transformation context\n");
return;
}
if (node == NULL) {
xsltTransformError(ctxt, NULL, inst,
"xsltExtElementTest: no current node\n");
return;
}
if (inst == NULL) {
xsltTransformError(ctxt, NULL, inst,
"xsltExtElementTest: no instruction\n");
return;
}
if (ctxt->insert == NULL) {
xsltTransformError(ctxt, NULL, inst,
"xsltExtElementTest: no insertion point\n");
return;
}
commentNode = xmlNewComment((const xmlChar *)
"libxslt:testplugin element test worked");
xmlAddChild(ctxt->insert, commentNode);
}
/**
* xsltExtInitTest:
* @ctxt: an XSLT transformation context
* @URI: the namespace URI for the extension
*
* A function called at initialization time of an XSLT extension module
*
* Returns a pointer to the module specific data for this transformation
*/
static void *
xsltExtInitTest(xsltTransformContextPtr ctxt, const xmlChar * URI)
{
if (testStyleData == NULL) {
xsltGenericDebug(xsltGenericErrorContext,
"xsltExtInitTest: not initialized,"
" calling xsltStyleGetExtData\n");
xsltStyleGetExtData(ctxt->style, URI);
if (testStyleData == NULL) {
xsltTransformError(ctxt, NULL, NULL,
"xsltExtInitTest: not initialized\n");
return (NULL);
}
}
if (testData != NULL) {
xsltTransformError(ctxt, NULL, NULL,
"xsltExtInitTest: already initialized\n");
return (NULL);
}
testData = (void *) "test data";
xsltGenericDebug(xsltGenericDebugContext,
"Registered test plugin module : %s\n", URI);
return (testData);
}
/**
* xsltExtShutdownTest:
* @ctxt: an XSLT transformation context
* @URI: the namespace URI for the extension
* @data: the data associated to this module
*
* A function called at shutdown time of an XSLT extension module
*/
static void
xsltExtShutdownTest(xsltTransformContextPtr ctxt,
const xmlChar * URI, void *data)
{
if (testData == NULL) {
xsltTransformError(ctxt, NULL, NULL,
"xsltExtShutdownTest: not initialized\n");
return;
}
if (data != testData) {
xsltTransformError(ctxt, NULL, NULL,
"xsltExtShutdownTest: wrong data\n");
}
testData = NULL;
xsltGenericDebug(xsltGenericDebugContext,
"Unregistered test plugin module : %s\n", URI);
}
/**
* xsltExtStyleInitTest:
* @style: an XSLT stylesheet
* @URI: the namespace URI for the extension
*
* A function called at initialization time of an XSLT extension module
*
* Returns a pointer to the module specific data for this transformation
*/
static void *
xsltExtStyleInitTest(xsltStylesheetPtr style ATTRIBUTE_UNUSED,
const xmlChar * URI)
{
if (testStyleData != NULL) {
xsltTransformError(NULL, NULL, NULL,
"xsltExtInitTest: already initialized\n");
return (NULL);
}
testStyleData = (void *) "test data";
xsltGenericDebug(xsltGenericDebugContext,
"Registered test plugin module : %s\n", URI);
return (testStyleData);
}
/**
* xsltExtStyleShutdownTest:
* @style: an XSLT stylesheet
* @URI: the namespace URI for the extension
* @data: the data associated to this module
*
* A function called at shutdown time of an XSLT extension module
*/
static void
xsltExtStyleShutdownTest(xsltStylesheetPtr style ATTRIBUTE_UNUSED,
const xmlChar * URI, void *data)
{
if (testStyleData == NULL) {
xsltGenericError(xsltGenericErrorContext,
"xsltExtShutdownTest: not initialized\n");
return;
}
if (data != testStyleData) {
xsltTransformError(NULL, NULL, NULL,
"xsltExtShutdownTest: wrong data\n");
}
testStyleData = NULL;
xsltGenericDebug(xsltGenericDebugContext,
"Unregistered test plugin module : %s\n", URI);
}
/**
* xmlsoft_org_xslt_testplugin_init:
*
* Registers the test plugin module
*/
void
xmlsoft_org_xslt_testplugin_init(void)
{
xsltRegisterExtModuleFull((const xmlChar *) XSLT_TESTPLUGIN_URL,
xsltExtInitTest, xsltExtShutdownTest,
xsltExtStyleInitTest,
xsltExtStyleShutdownTest);
xsltRegisterExtModuleFunction((const xmlChar *) "testplugin",
(const xmlChar *) XSLT_TESTPLUGIN_URL,
xsltExtFunctionTest);
xsltRegisterExtModuleElement((const xmlChar *) "testplugin",
(const xmlChar *) XSLT_TESTPLUGIN_URL,
xsltExtElementPreCompTest,
xsltExtElementTest);
}
#endif /*WITH_MODULES*/
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