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libxml-libxml-perl/perl-libxml-mm.c

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/**
* perl-libxml-mm.c
* $Id$
*
* This is free software, you may use it and distribute it under the same terms as
* Perl itself.
*
* Copyright 2001-2003 AxKit.com Ltd., 2002-2006 Christian Glahn, 2006-2009 Petr Pajas
*/
/*
*
* Basic concept:
* perl varies in the implementation of UTF8 handling. this header (together
* with the c source) implements a few functions, that can be used from within
* the core module inorder to avoid cascades of c pragmas
*/
#ifdef __cplusplus
extern "C" {
#endif
#include <stdarg.h>
#include <stdlib.h>
#include "perl-libxml-mm.h"
#include "XSUB.h"
#include "ppport.h"
#include <libxml/tree.h>
#ifdef XML_LIBXML_GDOME_SUPPORT
#include <libgdome/gdome.h>
#include <libgdome/gdome-libxml-util.h>
#endif
#include "perl-libxml-sax.h"
#ifdef __cplusplus
}
#endif
/**
* 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.
**/
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 "";
}
/*
* free a hash table
*/
void
PmmFreeHashTable(xmlHashTablePtr table)
{
if( xmlHashSize(table) > 0 ) {
warn("PmmFreeHashTable: not empty\n");
/* PmmDumpRegistry(table); */
}
/* warn("Freeing table %p with %d elements in\n", table, xmlHashSize(table)); */
xmlHashFree(table, NULL);
}
#ifdef XML_LIBXML_THREADS
/*
* registry of all current proxy nodes
*
* other classes like XML::LibXSLT must get a pointer
* to this registry via XML::LibXML::__proxy_registry
*
*/
extern SV* PROXY_NODE_REGISTRY_MUTEX;
/* Utility method used by PmmDumpRegistry */
void PmmRegistryDumpHashScanner(void * payload, void * data, xmlChar * name)
{
LocalProxyNodePtr lp = (LocalProxyNodePtr) payload;
ProxyNodePtr node = (ProxyNodePtr) lp->proxy;
const char * CLASS = PmmNodeTypeName( PmmNODE(node) );
warn("%s=%p with %d references (%d perl)\n",CLASS,node,PmmREFCNT(node),lp->count);
}
/*
* dump the current thread's node registry to STDERR
*/
void
PmmDumpRegistry(xmlHashTablePtr r)
{
if( r )
{
SvLOCK(PROXY_NODE_REGISTRY_MUTEX);
warn("%d total nodes\n", xmlHashSize(r));
xmlHashScan(r, PmmRegistryDumpHashScanner, NULL);
SvUNLOCK(PROXY_NODE_REGISTRY_MUTEX);
}
}
/*
* returns the address of the proxy registry
*/
xmlHashTablePtr*
PmmProxyNodeRegistryPtr(ProxyNodePtr proxy)
{
croak("PmmProxyNodeRegistryPtr: TODO!\n");
return NULL;
/* return &PmmREGISTRY; */
}
/*
* efficiently generate a string representation of the given pointer
*/
#define _PMM_HASH_NAME_SIZE(n) n+(n>>3)+(n%8>0 ? 1 : 0)
xmlChar *
PmmRegistryName(void * ptr)
{
unsigned long int v = (unsigned long int) ptr;
int HASH_NAME_SIZE = _PMM_HASH_NAME_SIZE(sizeof(void*));
xmlChar * name;
int i;
name = (xmlChar *) safemalloc(HASH_NAME_SIZE+1);
for(i = 0; i < HASH_NAME_SIZE; ++i)
{
name[i] = (xmlChar) (128 | v);
v >>= 7;
}
name[HASH_NAME_SIZE] = '\0';
return name;
}
/*
* allocate and return a new LocalProxyNode structure
*/
LocalProxyNodePtr
PmmNewLocalProxyNode(ProxyNodePtr proxy)
{
LocalProxyNodePtr lp;
Newc(0, lp, 1, LocalProxyNode, LocalProxyNode);
lp->proxy = proxy;
lp->count = 0;
return lp;
}
/*
* @proxy: proxy node to register
*
* adds a proxy node to the proxy node registry
*/
LocalProxyNodePtr
PmmRegisterProxyNode(ProxyNodePtr proxy)
{
xmlChar * name = PmmRegistryName( proxy );
LocalProxyNodePtr lp = PmmNewLocalProxyNode( proxy );
/* warn("LibXML registers proxy node with %p\n",PmmREGISTRY); */
SvLOCK(PROXY_NODE_REGISTRY_MUTEX);
if( xmlHashAddEntry(PmmREGISTRY, name, lp) )
croak("PmmRegisterProxyNode: error adding node to hash, hash size is %d\n",xmlHashSize(PmmREGISTRY));
SvUNLOCK(PROXY_NODE_REGISTRY_MUTEX);
Safefree(name);
return lp;
}
/* utility method for PmmUnregisterProxyNode */
/* PP: originally this was static inline void, but on AIX the compiler
did not chew it, so I'm removing the inline */
static void
PmmRegistryHashDeallocator(void *payload, xmlChar *name)
{
Safefree((LocalProxyNodePtr) payload);
}
/*
* @proxy: proxy node to remove
*
* removes a proxy node from the proxy node registry
*/
void
PmmUnregisterProxyNode(ProxyNodePtr proxy)
{
xmlChar * name = PmmRegistryName( proxy );
/* warn("LibXML unregistering proxy node with %p\n",PmmREGISTRY); */
SvLOCK(PROXY_NODE_REGISTRY_MUTEX);
if( xmlHashRemoveEntry(PmmREGISTRY, name, PmmRegistryHashDeallocator) )
croak("PmmUnregisterProxyNode: error removing node from hash\n");
Safefree(name);
SvUNLOCK(PROXY_NODE_REGISTRY_MUTEX);
}
/*
* lookup a LocalProxyNode in the registry
*/
LocalProxyNodePtr
PmmRegistryLookup(ProxyNodePtr proxy)
{
xmlChar * name = PmmRegistryName( proxy );
LocalProxyNodePtr lp = xmlHashLookup(PmmREGISTRY, name);
Safefree(name);
return lp;
}
/*
* increment the local refcount for proxy
*/
void
PmmRegistryREFCNT_inc(ProxyNodePtr proxy)
{
/* warn("Registry inc\n"); */
LocalProxyNodePtr lp = PmmRegistryLookup( proxy );
if( lp )
lp->count++;
else
PmmRegisterProxyNode( proxy )->count++;
}
/*
* decrement the local refcount for proxy and remove the local pointer if zero
*/
void
PmmRegistryREFCNT_dec(ProxyNodePtr proxy)
{
/* warn("Registry dec\n"); */
LocalProxyNodePtr lp = PmmRegistryLookup(proxy);
if( lp && --(lp->count) == 0 )
PmmUnregisterProxyNode(proxy);
}
/*
* internal, used by PmmCloneProxyNodes
*/
void *
PmmRegistryHashCopier(void *payload, xmlChar *name)
{
ProxyNodePtr proxy = ((LocalProxyNodePtr) payload)->proxy;
LocalProxyNodePtr lp;
Newc(0, lp, 1, LocalProxyNode, LocalProxyNode);
memcpy(lp, payload, sizeof(LocalProxyNode));
PmmREFCNT_inc(proxy);
return lp;
}
/*
* increments all proxy node counters by one (called on thread spawn)
*/
void
PmmCloneProxyNodes()
{
SV *sv_reg = get_sv("XML::LibXML::__PROXY_NODE_REGISTRY",0);
xmlHashTablePtr reg_copy;
SvLOCK(PROXY_NODE_REGISTRY_MUTEX);
reg_copy = xmlHashCopy(PmmREGISTRY, PmmRegistryHashCopier);
SvIV_set(SvRV(sv_reg), PTR2IV(reg_copy));
SvUNLOCK(PROXY_NODE_REGISTRY_MUTEX);
}
/*
* returns the current number of proxy nodes in the registry
*/
int
PmmProxyNodeRegistrySize()
{
return xmlHashSize(PmmREGISTRY);
}
#endif /* end of XML_LIBXML_THREADS */
/* 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.
*/
ProxyNodePtr
PmmNewNode(xmlNodePtr node)
{
ProxyNodePtr proxy = NULL;
if ( node == NULL ) {
xs_warn( "PmmNewNode: no node found\n" );
return NULL;
}
if ( node->_private == NULL ) {
switch ( node->type ) {
case XML_DOCUMENT_NODE:
case XML_HTML_DOCUMENT_NODE:
case XML_DOCB_DOCUMENT_NODE:
proxy = (ProxyNodePtr)xmlMalloc(sizeof(struct _DocProxyNode));
if (proxy != NULL) {
((DocProxyNodePtr)proxy)->psvi_status = Pmm_NO_PSVI;
SetPmmENCODING(proxy, XML_CHAR_ENCODING_NONE);
}
break;
default:
proxy = (ProxyNodePtr)xmlMalloc(sizeof(struct _ProxyNode));
break;
}
if (proxy != NULL) {
proxy->node = node;
proxy->owner = NULL;
proxy->count = 0;
node->_private = (void*) proxy;
}
}
else {
proxy = (ProxyNodePtr)node->_private;
}
return proxy;
}
ProxyNodePtr
PmmNewFragment(xmlDocPtr doc)
{
ProxyNodePtr retval = NULL;
xmlNodePtr frag = NULL;
xs_warn("PmmNewFragment: new frag\n");
frag = xmlNewDocFragment( doc );
retval = PmmNewNode(frag);
/* fprintf(stderr, "REFCNT NOT incremented on frag: 0x%08.8X\n", retval); */
if ( doc != NULL ) {
xs_warn("PmmNewFragment: inc document\n");
/* under rare circumstances _private is not set correctly? */
if ( doc->_private != NULL ) {
xs_warn("PmmNewFragment: doc->_private being incremented!\n");
PmmREFCNT_inc(((ProxyNodePtr)doc->_private));
/* fprintf(stderr, "REFCNT incremented on doc: 0x%08.8X\n", doc->_private); */
}
retval->owner = (xmlNodePtr)doc;
}
return retval;
}
/* frees the node if necessary. this method is aware that libxml2
* has several different nodetypes.
*/
void
PmmFreeNode( xmlNodePtr node )
{
switch( node->type ) {
case XML_DOCUMENT_NODE:
case XML_HTML_DOCUMENT_NODE:
xs_warn("PmmFreeNode: XML_DOCUMENT_NODE\n");
xmlFreeDoc( (xmlDocPtr) node );
break;
case XML_ATTRIBUTE_NODE:
xs_warn("PmmFreeNode: XML_ATTRIBUTE_NODE\n");
if ( node->parent == NULL ) {
xs_warn( "PmmFreeNode: free node!\n");
node->ns = NULL;
xmlFreeProp( (xmlAttrPtr) node );
}
break;
case XML_DTD_NODE:
if ( node->doc != NULL ) {
if ( node->doc->extSubset != (xmlDtdPtr)node
&& node->doc->intSubset != (xmlDtdPtr)node ) {
xs_warn( "PmmFreeNode: XML_DTD_NODE\n");
node->doc = NULL;
xmlFreeDtd( (xmlDtdPtr)node );
}
} else {
xs_warn( "PmmFreeNode: XML_DTD_NODE (no doc)\n");
xmlFreeDtd( (xmlDtdPtr)node );
}
break;
case XML_DOCUMENT_FRAG_NODE:
xs_warn("PmmFreeNode: XML_DOCUMENT_FRAG_NODE\n");
default:
xs_warn( "PmmFreeNode: normal node\n" );
xmlFreeNode( node);
break;
}
}
/* decrements the proxy counter. if the counter becomes zero or less,
this method will free the proxy node. If the node is part of a
subtree, PmmREFCNT_dec will fix the reference counts and delete
the subtree if it is not required any more.
*/
int
PmmREFCNT_dec( ProxyNodePtr node )
{
xmlNodePtr libnode = NULL;
ProxyNodePtr owner = NULL;
int retval = 0;
if ( node != NULL ) {
retval = PmmREFCNT(node)--;
/* fprintf(stderr, "REFCNT on 0x%08.8X decremented to %d\n", node, PmmREFCNT(node)); */
if ( PmmREFCNT(node) < 0 )
warn( "PmmREFCNT_dec: REFCNT decremented below 0 for %p!", node );
if ( PmmREFCNT(node) <= 0 ) {
xs_warn( "PmmREFCNT_dec: NODE DELETION\n" );
libnode = PmmNODE( node );
if ( libnode != NULL ) {
if ( libnode->_private != node ) {
xs_warn( "PmmREFCNT_dec: lost node\n" );
libnode = NULL;
}
else {
libnode->_private = NULL;
}
}
PmmNODE( node ) = NULL;
if ( PmmOWNER(node) && PmmOWNERPO(node) ) {
xs_warn( "PmmREFCNT_dec: DOC NODE!\n" );
owner = PmmOWNERPO(node);
PmmOWNER( node ) = NULL;
if( libnode != NULL && libnode->parent == NULL ) {
/* this is required if the node does not directly
* belong to the document tree
*/
xs_warn( "PmmREFCNT_dec: REAL DELETE\n" );
PmmFreeNode( libnode );
}
xs_warn( "PmmREFCNT_dec: decrease owner\n" );
PmmREFCNT_dec( owner );
}
else if ( libnode != NULL ) {
xs_warn( "PmmREFCNT_dec: STANDALONE REAL DELETE\n" );
PmmFreeNode( libnode );
}
else {
xs_warn( "PmmREFCNT_dec: NO OWNER\n" );
}
xmlFree( node );
}
}
else {
xs_warn("PmmREFCNT_dec: lost node\n" );
}
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;
dTHX;
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);
/* fprintf(stderr, " at 0x%08.8X\n", dfProxy); */
}
else {
dfProxy = PmmNewNode(node);
/* fprintf(stderr, " at 0x%08.8X\n", dfProxy); */
if ( dfProxy != NULL ) {
if ( owner != NULL ) {
dfProxy->owner = PmmNODE( owner );
PmmREFCNT_inc( owner );
/* fprintf(stderr, "REFCNT incremented on owner: 0x%08.8X\n", 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 ) {
SetPmmENCODING(dfProxy, (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;
}
xmlNodePtr
PmmCloneNode( xmlNodePtr node, int recursive )
{
xmlNodePtr retval = NULL;
if ( node != NULL ) {
switch ( node->type ) {
case XML_ELEMENT_NODE:
case XML_TEXT_NODE:
case XML_CDATA_SECTION_NODE:
case XML_ENTITY_REF_NODE:
case XML_PI_NODE:
case XML_COMMENT_NODE:
case XML_DOCUMENT_FRAG_NODE:
case XML_ENTITY_DECL:
retval = xmlCopyNode( node, recursive ? 1 : 2 );
break;
case XML_ATTRIBUTE_NODE:
retval = (xmlNodePtr) xmlCopyProp( NULL, (xmlAttrPtr) node );
break;
case XML_DOCUMENT_NODE:
case XML_HTML_DOCUMENT_NODE:
retval = (xmlNodePtr) xmlCopyDoc( (xmlDocPtr)node, recursive );
break;
case XML_DOCUMENT_TYPE_NODE:
case XML_DTD_NODE:
retval = (xmlNodePtr) xmlCopyDtd( (xmlDtdPtr)node );
break;
case XML_NAMESPACE_DECL:
retval = ( xmlNodePtr ) xmlCopyNamespace( (xmlNsPtr) node );
break;
default:
break;
}
}
return retval;
}
/* extracts the libxml2 node from a perl reference
*/
xmlNodePtr
PmmSvNodeExt( SV* perlnode, int copy )
{
xmlNodePtr retval = NULL;
ProxyNodePtr proxy = NULL;
dTHX;
if ( perlnode != NULL && perlnode != &PL_sv_undef ) {
/* if ( sv_derived_from(perlnode, "XML::LibXML::Node") */
/* && SvPROXYNODE(perlnode) != NULL ) { */
/* retval = PmmNODE( SvPROXYNODE(perlnode) ) ; */
/* } */
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;
}
/* extracts the libxml2 owner node from a perl reference
*/
xmlNodePtr
PmmSvOwner( SV* perlnode )
{
dTHX;
xmlNodePtr retval = NULL;
if ( perlnode != NULL
&& perlnode != &PL_sv_undef
&& SvPROXYNODE(perlnode) != NULL ) {
retval = PmmOWNER( SvPROXYNODE(perlnode) );
}
return retval;
}
/* reverse to PmmSvOwner(). sets the owner of the current node. this
* will increase the proxy count of the owner.
*/
SV*
PmmSetSvOwner( SV* perlnode, SV* extra )
{
dTHX;
if ( perlnode != NULL && perlnode != &PL_sv_undef ) {
PmmOWNER( SvPROXYNODE(perlnode)) = PmmNODE( SvPROXYNODE(extra) );
PmmREFCNT_inc( SvPROXYNODE(extra) );
/* fprintf(stderr, "REFCNT incremented on new owner: 0x%08.8X\n", SvPROXYNODE(extra)); */
}
return perlnode;
}
void PmmFixOwnerList( xmlNodePtr list, ProxyNodePtr parent );
/**
* this functions fixes the reference counts for an entire subtree.
* it is very important to fix an entire subtree after node operations
* where the documents or the owner node may get changed. this method is
* aware about nodes that already belong to a certain owner node.
*
* the method uses the internal methods PmmFixNode and PmmChildNodes to
* do the real updates.
*
* in the worst case this traverses the subtree twice during a node
* operation. this case is only given when the node has to be
* adopted by the document. Since the ownerdocument and the effective
* owner may differ this double traversing makes sense.
*/
int
PmmFixOwner( ProxyNodePtr nodetofix, ProxyNodePtr parent )
{
ProxyNodePtr oldParent = NULL;
if ( nodetofix != NULL ) {
switch ( PmmNODE(nodetofix)->type ) {
case XML_ENTITY_DECL:
case XML_ATTRIBUTE_DECL:
case XML_NAMESPACE_DECL:
case XML_ELEMENT_DECL:
case XML_DOCUMENT_NODE:
xs_warn( "PmmFixOwner: don't need to fix this type of node\n" );
return(0);
default:
break;
}
if ( PmmOWNER(nodetofix) != NULL ) {
oldParent = PmmOWNERPO(nodetofix);
}
/* The owner data is only fixed if the node is neither a
* fragment nor a document. Also no update will happen if
* the node is already his owner or the owner has not
* changed during previous operations.
*/
if( oldParent != parent ) {
xs_warn( "PmmFixOwner: re-parenting node\n" );
/* fprintf(stderr, " 0x%08.8X (%s)\n", nodetofix, PmmNODE(nodetofix)->name); */
if ( parent && parent != nodetofix ){
PmmOWNER(nodetofix) = PmmNODE(parent);
PmmREFCNT_inc( parent );
/* fprintf(stderr, "REFCNT incremented on new parent: 0x%08.8X\n", parent); */
}
else {
PmmOWNER(nodetofix) = NULL;
}
if ( oldParent != NULL && oldParent != nodetofix )
PmmREFCNT_dec(oldParent);
if ( PmmNODE(nodetofix)->type != XML_ATTRIBUTE_NODE
&& PmmNODE(nodetofix)->type != XML_DTD_NODE
&& PmmNODE(nodetofix)->properties != NULL ) {
PmmFixOwnerList( (xmlNodePtr)PmmNODE(nodetofix)->properties,
parent );
}
if ( parent == NULL || PmmNODE(nodetofix)->parent == NULL ) {
/* fix to self */
parent = nodetofix;
}
PmmFixOwnerList(PmmNODE(nodetofix)->children, parent);
}
else {
xs_warn( "PmmFixOwner: node doesn't need to get fixed\n" );
}
return(1);
}
return(0);
}
void
PmmFixOwnerList( xmlNodePtr list, ProxyNodePtr parent )
{
if ( list != NULL ) {
xmlNodePtr iterator = list;
while ( iterator != NULL ) {
switch ( iterator->type ) {
case XML_ENTITY_DECL:
case XML_ATTRIBUTE_DECL:
case XML_NAMESPACE_DECL:
case XML_ELEMENT_DECL:
xs_warn( "PmmFixOwnerList: don't need to fix this type of node\n" );
iterator = iterator->next;
continue;
break;
default:
break;
}
if ( iterator->_private != NULL ) {
PmmFixOwner( (ProxyNodePtr)iterator->_private, parent );
}
else {
if ( iterator->type != XML_ATTRIBUTE_NODE
&& iterator->properties != NULL ){
PmmFixOwnerList( (xmlNodePtr)iterator->properties, parent );
}
PmmFixOwnerList(iterator->children, parent);
}
iterator = iterator->next;
}
}
}
void
PmmFixOwnerNode( xmlNodePtr node, ProxyNodePtr parent )
{
if ( node != NULL && parent != NULL ) {
if ( node->_private != NULL ) {
xs_warn( "PmmFixOwnerNode: calling PmmFixOwner\n" );
PmmFixOwner( node->_private, parent );
}
else {
xs_warn( "PmmFixOwnerNode: calling PmmFixOwnerList\n" );
PmmFixOwnerList(node->children, parent );
}
}
}
ProxyNodePtr
PmmNewContext(xmlParserCtxtPtr node)
{
ProxyNodePtr proxy = NULL;
proxy = (ProxyNodePtr)xmlMalloc(sizeof(ProxyNode));
if (proxy != NULL) {
proxy->node = (xmlNodePtr)node;
proxy->owner = NULL;
proxy->count = 0;
}
else {
warn( "empty context" );
}
return proxy;
}
int
PmmContextREFCNT_dec( ProxyNodePtr node )
{
xmlParserCtxtPtr libnode = NULL;
int retval = 0;
if ( node != NULL ) {
retval = PmmREFCNT(node)--;
/* fprintf(stderr, "REFCNT on context %p decremented to %d\n", node, PmmREFCNT(node)); */
if ( PmmREFCNT(node) <= 0 ) {
xs_warn( "PmmContextREFCNT_dec: NODE DELETION\n" );
libnode = (xmlParserCtxtPtr)PmmNODE( node );
if ( libnode != NULL ) {
if (libnode->_private != NULL ) {
if ( libnode->_private != (void*)node ) {
PmmSAXCloseContext( libnode );
}
else {
xmlFree( libnode->_private );
}
libnode->_private = NULL;
}
PmmNODE( node ) = NULL;
xmlFreeParserCtxt(libnode);
}
}
xmlFree( node );
}
return retval;
}
SV*
PmmContextSv( xmlParserCtxtPtr ctxt )
{
ProxyNodePtr dfProxy= NULL;
dTHX;
SV * retval = &PL_sv_undef;
const char * CLASS = "XML::LibXML::ParserContext";
if ( ctxt != NULL ) {
dfProxy = PmmNewContext(ctxt);
retval = NEWSV(0,0);
sv_setref_pv( retval, CLASS, (void*)dfProxy );
PmmREFCNT_inc(dfProxy);
/* fprintf(stderr, "REFCNT incremented on new context: 0x%08.8X\n", dfProxy); */
}
else {
xs_warn( "PmmContextSv: no node found!\n" );
}
return retval;
}
xmlParserCtxtPtr
PmmSvContext( SV * scalar )
{
xmlParserCtxtPtr retval = NULL;
dTHX;
if ( scalar != NULL
&& scalar != &PL_sv_undef
&& sv_isa( scalar, "XML::LibXML::ParserContext" )
&& SvPROXYNODE(scalar) != NULL ) {
retval = (xmlParserCtxtPtr)PmmNODE( SvPROXYNODE(scalar) );
}
else {
if ( scalar == NULL
&& scalar == &PL_sv_undef ) {
xs_warn( "PmmSvContext: no scalar!\n" );
}
else if ( ! sv_isa( scalar, "XML::LibXML::ParserContext" ) ) {
xs_warn( "PmmSvContext: bad object\n" );
}
else if (SvPROXYNODE(scalar) == NULL) {
xs_warn( "PmmSvContext: empty object\n" );
}
else {
xs_warn( "PmmSvContext: nothing was wrong!\n");
}
}
return retval;
}
xmlChar*
PmmFastEncodeString( int charset,
const xmlChar *string,
const xmlChar *encoding,
STRLEN len )
{
xmlCharEncodingHandlerPtr coder = NULL;
xmlChar *retval = NULL;
xmlBufferPtr in = NULL, out = NULL;
int i;
/* first check that the input is not ascii */
/* since we do not want to recode ascii as, say, UTF-16 */
if (len == 0)
len=xmlStrlen(string);
for (i=0; i<len; i++) {
if(!string[i] || string[i] & 0x80) {
break;
}
}
if (i>=len) return xmlStrdup( string );
xs_warn("PmmFastEncodeString: string is non-ascii\n");
if ( charset == XML_CHAR_ENCODING_ERROR){
if (xmlStrcmp(encoding,(const xmlChar*)"UTF-16LE")==0) {
charset = XML_CHAR_ENCODING_UTF16LE;
} else if (xmlStrcmp(encoding,(const xmlChar*) "UTF-16BE")==0) {
charset = XML_CHAR_ENCODING_UTF16BE;
}
}
if ( charset == XML_CHAR_ENCODING_UTF8 ) {
/* warn("use UTF8 for encoding ... %s ", string); */
return xmlStrdup( string );
}
else if ( charset == XML_CHAR_ENCODING_UTF16LE || charset == XML_CHAR_ENCODING_UTF16BE ){
/* detect and strip BOM, if any */
if (len>=2 && (char)string[0]=='\xFE' && (char)string[1]=='\xFF') {
xs_warn("detected BE BOM\n");
string += 2;
len -= 2;
coder = xmlGetCharEncodingHandler( XML_CHAR_ENCODING_UTF16BE );
} else if (len>=2 && (char)string[0]=='\xFF' && (char)string[1]=='\xFE') {
xs_warn("detected LE BOM\n");
string += 2;
len -= 2;
coder = xmlGetCharEncodingHandler( XML_CHAR_ENCODING_UTF16LE );
} else {
coder= xmlGetCharEncodingHandler( charset );
}
}
else if ( charset == XML_CHAR_ENCODING_ERROR ){
/* warn("no standard encoding %s\n", encoding); */
coder =xmlFindCharEncodingHandler( (const char *)encoding );
}
else if ( charset == XML_CHAR_ENCODING_NONE ){
xs_warn("PmmFastEncodeString: no encoding found\n");
}
else {
/* warn( "use document encoding %s (%d)", encoding, charset ); */
coder= xmlGetCharEncodingHandler( charset );
}
if ( coder != NULL ) {
xs_warn("PmmFastEncodeString: coding machine found \n");
in = xmlBufferCreateStatic((void*)string, len);
out = xmlBufferCreate();
if ( xmlCharEncInFunc( coder, out, in ) >= 0 ) {
retval = xmlStrdup( out->content );
/* warn( "encoded string is %s" , retval); */
}
else {
/* warn( "b0rked encoiding!\n"); */
}
xmlBufferFree( in );
xmlBufferFree( out );
xmlCharEncCloseFunc( coder );
}
return retval;
}
xmlChar*
PmmFastDecodeString( int charset,
const xmlChar *string,
const xmlChar *encoding,
STRLEN* len )
{
xmlCharEncodingHandlerPtr coder = NULL;
xmlChar *retval = NULL;
xmlBufferPtr in = NULL, out = NULL;
if (len==NULL) return NULL;
*len = 0;
if ( charset == XML_CHAR_ENCODING_ERROR){
if (xmlStrcmp(encoding,(const xmlChar*)"UTF-16LE")==0) {
charset = XML_CHAR_ENCODING_UTF16LE;
} else if (xmlStrcmp(encoding,(const xmlChar*) "UTF-16BE")==0) {
charset = XML_CHAR_ENCODING_UTF16BE;
}
}
if ( charset == XML_CHAR_ENCODING_UTF8 ) {
retval = xmlStrdup( string );
*len = xmlStrlen(retval);
}
else if ( charset == XML_CHAR_ENCODING_ERROR ){
coder = xmlFindCharEncodingHandler( (const char *) encoding );
}
else if ( charset == XML_CHAR_ENCODING_NONE ){
warn("PmmFastDecodeString: no encoding found\n");
}
else {
coder= xmlGetCharEncodingHandler( charset );
}
if ( coder != NULL ) {
/* warn( "do encoding %s", string ); */
in = xmlBufferCreateStatic((void*)string,xmlStrlen(string));
out = xmlBufferCreate();
if ( xmlCharEncOutFunc( coder, out, in ) >= 0 ) {
*len = xmlBufferLength(out);
retval = xmlStrndup(xmlBufferContent(out), *len);
}
else {
/* xs_warn("PmmFastEncodeString: decoding error\n"); */
}
xmlBufferFree( in );
xmlBufferFree( out );
xmlCharEncCloseFunc( coder );
}
return retval;
}
/**
* encodeString returns an UTF-8 encoded String
* while the encodig has the name of the encoding of string
**/
xmlChar*
PmmEncodeString( const char *encoding, const xmlChar *string, STRLEN len ){
xmlCharEncoding enc;
xmlChar *ret = NULL;
if ( string != NULL ) {
if( encoding != NULL ) {
xs_warn("PmmEncodeString: encoding to UTF-8 from:\n");
xs_warn( encoding );
enc = xmlParseCharEncoding( encoding );
ret = PmmFastEncodeString( enc, string, (const xmlChar *)encoding,len);
}
else {
/* if utf-8 is requested we do nothing */
ret = xmlStrdup( string );
}
}
return ret;
}
SV*
C2Sv( const xmlChar *string, const xmlChar *encoding )
{
SV *retval = &PL_sv_undef;
xmlCharEncoding enc;
if ( string != NULL ) {
if ( encoding != NULL ) {
enc = xmlParseCharEncoding( (const char*)encoding );
}
else {
enc = 0;
}
if ( enc == 0 ) {
/* this happens if the encoding is "" or NULL */
enc = XML_CHAR_ENCODING_UTF8;
}
retval = newSVpvn( (const char *)string, (STRLEN) xmlStrlen(string) );
if ( enc == XML_CHAR_ENCODING_UTF8 ) {
/* create an UTF8 string. */
#ifdef HAVE_UTF8
xs_warn("C2Sv: set UTF8-SV-flag\n");
SvUTF8_on(retval);
#endif
}
}
return retval;
}
xmlChar *
Sv2C( SV* scalar, const xmlChar *encoding )
{
xmlChar *retval = NULL;
dTHX;
xs_warn("SV2C: start!\n");
if ( scalar != NULL && scalar != &PL_sv_undef ) {
STRLEN len = 0;
char * t_pv =SvPV(scalar, len);
xmlChar* ts = NULL;
xmlChar* string = xmlStrdup((xmlChar*)t_pv);
if ( xmlStrlen(string) > 0 ) {
xs_warn( "SV2C: no undefs\n" );
#ifdef HAVE_UTF8
xs_warn( "SV2C: use UTF8\n" );
if( !DO_UTF8(scalar) && encoding != NULL ) {
#else
if ( encoding != NULL ) {
#endif
xs_warn( "SV2C: domEncodeString!\n" );
ts= PmmEncodeString( (const char *)encoding, string, len );
xs_warn( "SV2C: done encoding!\n" );
if ( string != NULL ) {
xmlFree(string);
}
string=ts;
}
}
retval = xmlStrdup(string);
if (string != NULL ) {
xmlFree(string);
}
}
xs_warn("SV2C: end!\n");
return retval;
}
SV*
nodeC2Sv( const xmlChar * string, xmlNodePtr refnode )
{
/* this is a little helper function to avoid to much redundand
code in LibXML.xs */
dTHX;
SV* retval = &PL_sv_undef;
STRLEN len = 0;
xmlChar * decoded = NULL;
if ( refnode != NULL ) {
xmlDocPtr real_doc = refnode->doc;
if ( real_doc != NULL && real_doc->encoding != NULL ) {
xs_warn( " encode node !!" );
/* The following statement is to handle bad
values set by XML::LibXSLT */
if ( PmmNodeEncoding(real_doc) == XML_CHAR_ENCODING_NONE ) {
SetPmmNodeEncoding(real_doc, XML_CHAR_ENCODING_UTF8);
}
decoded = PmmFastDecodeString( PmmNodeEncoding(real_doc),
(const xmlChar *)string,
(const xmlChar *)real_doc->encoding,
&len );
xs_warn( "push decoded string into SV" );
retval = newSVpvn( (const char *)decoded, len );
xmlFree( decoded );
if ( PmmNodeEncoding( real_doc ) == XML_CHAR_ENCODING_UTF8 ) {
#ifdef HAVE_UTF8
xs_warn("nodeC2Sv: set UTF8-SV-flag\n");
SvUTF8_on(retval);
#endif
}
return retval;
}
}
return C2Sv(string, NULL );
}
xmlChar *
nodeSv2C( SV * scalar, xmlNodePtr refnode )
{
/* this function requires conditionized compiling, because we
request a function, that does not exists in earlier versions of
perl. in this cases the library assumes, all strings are in
UTF8. if a programmer likes to have the intelligent code, he
needs to upgrade perl */
if ( refnode != NULL ) {
xmlDocPtr real_dom = refnode->doc;
xs_warn("nodeSv2C: have node!\n");
if (real_dom != NULL && real_dom->encoding != NULL ) {
dTHX;
xs_warn("nodeSv2C: encode string!\n");
/* speed things a bit up.... */
if ( scalar != NULL && scalar != &PL_sv_undef ) {
STRLEN len = 0;
char * t_pv =SvPV(scalar, len);
xmlChar* string = NULL;
if ( t_pv && len > 0 ) {
xs_warn( "nodeSv2C: no undefs\n" );
#ifdef HAVE_UTF8
xs_warn( "nodeSv2C: use UTF8\n" );
if( !DO_UTF8(scalar) ) {
#endif
xs_warn( "nodeSv2C: domEncodeString!\n" );
/* The following statement is to handle bad
values set by XML::LibXSLT */
if ( PmmNodeEncoding(real_dom) == XML_CHAR_ENCODING_NONE ) {
SetPmmNodeEncoding(real_dom, XML_CHAR_ENCODING_UTF8);
}
/* the following allocates a new string (by xmlStrdup if no conversion is done) */
string= PmmFastEncodeString( PmmNodeEncoding(real_dom),
(xmlChar*) t_pv,
(const xmlChar*)real_dom->encoding,
len);
xs_warn( "nodeSv2C: done!\n" );
#ifdef HAVE_UTF8
} else {
xs_warn( "nodeSv2C: no encoding set, use UTF8!\n" );
}
#endif
}
if (string==NULL) {
return xmlStrndup((xmlChar*)t_pv,len);
} else {
return string;
}
/* if ( string == NULL ) warn( "nodeSv2C: string is NULL\n" ); */
}
else {
xs_warn( "nodeSv2C: return NULL\n" );
return NULL;
}
}
else {
xs_warn( "nodeSv2C: document has no encoding defined! use simple SV extraction\n" );
}
}
xs_warn("nodeSv2C: no encoding !!\n");
return Sv2C( scalar, NULL );
}
SV *
PmmNodeToGdomeSv( xmlNodePtr node )
{
dTHX;
SV * retval = &PL_sv_undef;
#ifdef XML_LIBXML_GDOME_SUPPORT
GdomeNode * gnode = NULL;
GdomeException exc;
const char * CLASS = "";
if ( node != NULL ) {
gnode = gdome_xml_n_mkref( node );
if ( gnode != NULL ) {
switch (gdome_n_nodeType(gnode, &exc)) {
case GDOME_ELEMENT_NODE:
CLASS = "XML::GDOME::Element";
break;
case GDOME_ATTRIBUTE_NODE:
CLASS = "XML::GDOME::Attr";
break;
case GDOME_TEXT_NODE:
CLASS = "XML::GDOME::Text";
break;
case GDOME_CDATA_SECTION_NODE:
CLASS = "XML::GDOME::CDATASection";
break;
case GDOME_ENTITY_REFERENCE_NODE:
CLASS = "XML::GDOME::EntityReference";
break;
case GDOME_ENTITY_NODE:
CLASS = "XML::GDOME::Entity";
break;
case GDOME_PROCESSING_INSTRUCTION_NODE:
CLASS = "XML::GDOME::ProcessingInstruction";
break;
case GDOME_COMMENT_NODE:
CLASS = "XML::GDOME::Comment";
break;
case GDOME_DOCUMENT_TYPE_NODE:
CLASS = "XML::GDOME::DocumentType";
break;
case GDOME_DOCUMENT_FRAGMENT_NODE:
CLASS = "XML::GDOME::DocumentFragment";
break;
case GDOME_NOTATION_NODE:
CLASS = "XML::GDOME::Notation";
break;
case GDOME_DOCUMENT_NODE:
CLASS = "XML::GDOME::Document";
break;
default:
break;
}
retval = NEWSV(0,0);
sv_setref_pv( retval, CLASS, gnode);
}
}
#endif
return retval;
}
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