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#include "libxml.h"
#define PmmNODE(xnode) xnode->node
#define SvPROXYNODE(x) (INT2PTR(ProxyNodePtr,SvIV(SvRV(x))))
#define xs_warn(string)
#define PmmREFCNT_inc(node) node->count++
static const char* PmmNodeTypeName( xmlNodePtr elem);
static ProxyNodePtr PmmNewNode(xmlNodePtr node);
xmlNodePtr
PmmSvNodeExt(SV *perlnode, int copy)
{
xmlNodePtr retval = NULL;
ProxyNodePtr proxy = NULL;
if ( perlnode != NULL && perlnode != &PL_sv_undef ) {
xs_warn("PmmSvNodeExt: perlnode found\n" );
if ( sv_derived_from(perlnode, "XML::LibXML::Node") ) {
proxy = SvPROXYNODE(perlnode);
if ( proxy != NULL ) {
xs_warn( "PmmSvNodeExt: is a xmlNodePtr structure\n" );
retval = PmmNODE( proxy ) ;
}
if ( retval != NULL
&& ((ProxyNodePtr)retval->_private) != proxy ) {
xs_warn( "PmmSvNodeExt: no node in proxy node\n" );
PmmNODE( proxy ) = NULL;
retval = NULL;
}
}
#ifdef XML_LIBXML_GDOME_SUPPORT
else if ( sv_derived_from( perlnode, "XML::GDOME::Node" ) ) {
GdomeNode* gnode = (GdomeNode*)SvIV((SV*)SvRV( perlnode ));
if ( gnode == NULL ) {
warn( "no XML::GDOME data found (datastructure empty)" );
}
else {
retval = gdome_xml_n_get_xmlNode( gnode );
if ( retval == NULL ) {
xs_warn( "PmmSvNodeExt: no XML::LibXML node found in GDOME object\n" );
}
else if ( copy == 1 ) {
retval = PmmCloneNode( retval, 1 );
}
}
}
#endif
}
return retval;
}
/* @node: the node that should be wrapped into a SV
* @owner: perl instance of the owner node (may be NULL)
*
* This function will create a real perl instance of a given node.
* the function is called directly by the XS layer, to generate a perl
* instance of the node. All node reference counts are updated within
* this function. Therefore this function returns a node that can
* directly be used as output.
*
* if @ower is NULL or undefined, the node is ment to be the root node
* of the tree. this node will later be used as an owner of other
* nodes.
*/
SV*
PmmNodeToSv( xmlNodePtr node, ProxyNodePtr owner )
{
ProxyNodePtr dfProxy= NULL;
SV * retval = &PL_sv_undef;
const char * CLASS = "XML::LibXML::Node";
if ( node != NULL ) {
#ifdef XML_LIBXML_THREADS
if( PmmUSEREGISTRY )
SvLOCK(PROXY_NODE_REGISTRY_MUTEX);
#endif
/* find out about the class */
CLASS = PmmNodeTypeName( node );
xs_warn("PmmNodeToSv: return new perl node of class:\n");
xs_warn( CLASS );
if ( node->_private != NULL ) {
dfProxy = PmmNewNode(node);
}
else {
dfProxy = PmmNewNode(node);
if ( dfProxy != NULL ) {
if ( owner != NULL ) {
dfProxy->owner = PmmNODE( owner );
PmmREFCNT_inc( owner );
}
else {
xs_warn("PmmNodeToSv: node contains itself (owner==NULL)\n");
}
}
else {
croak("XML::LibXML: failed to create a proxy node (out of memory?)\n");
}
}
retval = NEWSV(0,0);
sv_setref_pv( retval, CLASS, (void*)dfProxy );
#ifdef XML_LIBXML_THREADS
if( PmmUSEREGISTRY )
PmmRegistryREFCNT_inc(dfProxy);
#endif
PmmREFCNT_inc(dfProxy);
/* fprintf(stderr, "REFCNT incremented on node: 0x%08.8X\n", dfProxy); */
switch ( node->type ) {
case XML_DOCUMENT_NODE:
case XML_HTML_DOCUMENT_NODE:
case XML_DOCB_DOCUMENT_NODE:
if ( ((xmlDocPtr)node)->encoding != NULL ) {
dfProxy->encoding = (int)xmlParseCharEncoding( (const char*)((xmlDocPtr)node)->encoding );
}
break;
default:
break;
}
#ifdef XML_LIBXML_THREADS
if( PmmUSEREGISTRY )
SvUNLOCK(PROXY_NODE_REGISTRY_MUTEX);
#endif
}
else {
xs_warn( "PmmNodeToSv: no node found!\n" );
}
return retval;
}
/**
* this is a wrapper function that does the type evaluation for the
* node. this makes the code a little more readable in the .XS
*
* the code is not really portable, but i think we'll avoid some
* memory leak problems that way.
**/
static const char*
PmmNodeTypeName( xmlNodePtr elem ){
const char *name = "XML::LibXML::Node";
if ( elem != NULL ) {
switch ( elem->type ) {
case XML_ELEMENT_NODE:
name = "XML::LibXML::Element";
break;
case XML_TEXT_NODE:
name = "XML::LibXML::Text";
break;
case XML_COMMENT_NODE:
name = "XML::LibXML::Comment";
break;
case XML_CDATA_SECTION_NODE:
name = "XML::LibXML::CDATASection";
break;
case XML_ATTRIBUTE_NODE:
name = "XML::LibXML::Attr";
break;
case XML_DOCUMENT_NODE:
case XML_HTML_DOCUMENT_NODE:
name = "XML::LibXML::Document";
break;
case XML_DOCUMENT_FRAG_NODE:
name = "XML::LibXML::DocumentFragment";
break;
case XML_NAMESPACE_DECL:
name = "XML::LibXML::Namespace";
break;
case XML_DTD_NODE:
name = "XML::LibXML::Dtd";
break;
case XML_PI_NODE:
name = "XML::LibXML::PI";
break;
default:
name = "XML::LibXML::Node";
break;
};
return name;
}
return "";
}
/* creates a new proxy node from a given node. this function is aware
* about the fact that a node may already has a proxy structure.
*/
static ProxyNodePtr
PmmNewNode(xmlNodePtr node)
{
ProxyNodePtr proxy = NULL;
if ( node == NULL ) {
xs_warn( "PmmNewNode: no node found\n" );
return NULL;
}
if ( node->_private == NULL ) {
proxy = (ProxyNodePtr)xmlMalloc(sizeof(struct _ProxyNode));
if (proxy != NULL) {
proxy->node = node;
proxy->owner = NULL;
proxy->count = 0;
proxy->encoding= 0;
node->_private = (void*) proxy;
}
}
else {
proxy = (ProxyNodePtr)node->_private;
}
return proxy;
}
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