814 lines
16 KiB
C++
814 lines
16 KiB
C++
/* xml++.cc
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* libxml++ and this file are copyright (C) 2000 by Ari Johnson, and
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* are covered by the GNU Lesser General Public License, which should be
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* included with libxml++ as the file COPYING.
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* Modified for Ardour and released under the same terms.
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*/
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#include <iostream>
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#include "pbd/stacktrace.h"
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#include "pbd/xml++.h"
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#include <libxml/debugXML.h>
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#include <libxml/xpath.h>
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#include <libxml/xpathInternals.h>
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xmlChar* xml_version = xmlCharStrdup("1.0");
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using namespace std;
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static XMLNode* readnode(xmlNodePtr);
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static void writenode(xmlDocPtr, XMLNode*, xmlNodePtr, int);
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static XMLSharedNodeList* find_impl(xmlXPathContext* ctxt, const string& xpath);
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XMLTree::XMLTree()
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: _filename()
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, _root(0)
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, _doc (0)
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, _compression(0)
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{
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}
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XMLTree::XMLTree(const string& fn, bool validate)
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: _filename(fn)
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, _root(0)
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, _doc (0)
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, _compression(0)
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{
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read_internal(validate);
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}
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XMLTree::XMLTree(const XMLTree* from)
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: _filename(from->filename())
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, _root(new XMLNode(*from->root()))
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, _doc (xmlCopyDoc (from->_doc, 1))
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, _compression(from->compression())
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{
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}
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XMLTree::~XMLTree()
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{
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delete _root;
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if (_doc) {
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xmlFreeDoc (_doc);
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}
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}
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int
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XMLTree::set_compression(int c)
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{
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if (c > 9) {
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c = 9;
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} else if (c < 0) {
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c = 0;
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}
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_compression = c;
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return _compression;
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}
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bool
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XMLTree::read_internal(bool validate)
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{
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//shouldnt be used anywhere ATM, remove if so!
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assert(!validate);
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delete _root;
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_root = 0;
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if (_doc) {
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xmlFreeDoc (_doc);
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_doc = 0;
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}
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/* create a parser context */
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xmlParserCtxtPtr ctxt = xmlNewParserCtxt();
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if (ctxt == NULL) {
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return false;
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}
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xmlKeepBlanksDefault(0);
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/* parse the file, activating the DTD validation option */
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if (validate) {
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_doc = xmlCtxtReadFile(ctxt, _filename.c_str(), NULL, XML_PARSE_DTDVALID);
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} else {
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_doc = xmlCtxtReadFile(ctxt, _filename.c_str(), NULL, XML_PARSE_HUGE);
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}
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/* check if parsing suceeded */
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if (_doc == NULL) {
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xmlFreeParserCtxt(ctxt);
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return false;
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} else {
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/* check if validation suceeded */
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if (validate && ctxt->valid == 0) {
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xmlFreeParserCtxt(ctxt);
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throw XMLException("Failed to validate document " + _filename);
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}
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}
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_root = readnode(xmlDocGetRootElement(_doc));
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/* free up the parser context */
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xmlFreeParserCtxt(ctxt);
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return true;
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}
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bool
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XMLTree::read_buffer(const string& buffer, bool to_tree_doc)
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{
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xmlDocPtr doc;
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_filename = "";
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delete _root;
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_root = 0;
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doc = xmlParseMemory(const_cast<char*>(buffer.c_str()), buffer.length());
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if (!doc) {
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return false;
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}
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_root = readnode(xmlDocGetRootElement(doc));
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if (to_tree_doc) {
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if (_doc) {
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xmlFreeDoc (_doc);
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}
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_doc = doc;
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} else {
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xmlFreeDoc (doc);
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}
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return true;
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}
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bool
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XMLTree::write() const
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{
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xmlDocPtr doc;
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XMLNodeList children;
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int result;
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xmlKeepBlanksDefault(0);
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doc = xmlNewDoc(xml_version);
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xmlSetDocCompressMode(doc, _compression);
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writenode(doc, _root, doc->children, 1);
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result = xmlSaveFormatFileEnc(_filename.c_str(), doc, "UTF-8", 1);
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#ifndef NDEBUG
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if (result == -1) {
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xmlErrorPtr xerr = xmlGetLastError ();
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if (!xerr) {
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std::cerr << "unknown XML error during xmlSaveFormatFileEnc()." << std::endl;
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} else {
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std::cerr << "xmlSaveFormatFileEnc: error"
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<< " domain: " << xerr->domain
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<< " code: " << xerr->code
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<< " msg: " << xerr->message
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<< std::endl;
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}
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}
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#endif
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xmlFreeDoc(doc);
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if (result == -1) {
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return false;
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}
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return true;
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}
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void
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XMLTree::debug(FILE* out) const
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{
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#ifdef LIBXML_DEBUG_ENABLED
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xmlDocPtr doc;
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XMLNodeList children;
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xmlKeepBlanksDefault(0);
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doc = xmlNewDoc(xml_version);
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xmlSetDocCompressMode(doc, _compression);
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writenode(doc, _root, doc->children, 1);
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xmlDebugDumpDocument (out, doc);
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xmlFreeDoc(doc);
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#endif
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}
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const string&
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XMLTree::write_buffer() const
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{
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static string retval;
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char* ptr;
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int len;
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xmlDocPtr doc;
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XMLNodeList children;
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xmlKeepBlanksDefault(0);
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doc = xmlNewDoc(xml_version);
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xmlSetDocCompressMode(doc, _compression);
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writenode(doc, _root, doc->children, 1);
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xmlDocDumpMemory(doc, (xmlChar **) & ptr, &len);
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xmlFreeDoc(doc);
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retval = ptr;
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free(ptr);
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return retval;
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}
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static const int PROPERTY_RESERVE_COUNT = 16;
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XMLNode::XMLNode(const string& n)
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: _name(n)
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, _is_content(false)
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{
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_proplist.reserve (PROPERTY_RESERVE_COUNT);
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}
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XMLNode::XMLNode(const string& n, const string& c)
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: _name(n)
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, _is_content(true)
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, _content(c)
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{
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_proplist.reserve (PROPERTY_RESERVE_COUNT);
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}
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XMLNode::XMLNode(const XMLNode& from)
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{
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_proplist.reserve (PROPERTY_RESERVE_COUNT);
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*this = from;
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}
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XMLNode::~XMLNode()
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{
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clear_lists ();
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}
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void
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XMLNode::clear_lists ()
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{
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XMLNodeIterator curchild;
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XMLPropertyIterator curprop;
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_selected_children.clear ();
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for (curchild = _children.begin(); curchild != _children.end(); ++curchild) {
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delete *curchild;
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}
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_children.clear ();
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for (curprop = _proplist.begin(); curprop != _proplist.end(); ++curprop) {
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delete *curprop;
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}
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_proplist.clear ();
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}
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XMLNode&
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XMLNode::operator= (const XMLNode& from)
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{
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if (&from == this) {
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return *this;
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}
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clear_lists ();
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_name = from.name ();
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set_content (from.content ());
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const XMLPropertyList& props = from.properties ();
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for (XMLPropertyConstIterator prop_iter = props.begin (); prop_iter != props.end (); ++prop_iter) {
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set_property ((*prop_iter)->name ().c_str (), (*prop_iter)->value ());
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}
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const XMLNodeList& nodes = from.children ();
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for (XMLNodeConstIterator child_iter = nodes.begin (); child_iter != nodes.end (); ++child_iter) {
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add_child_copy (**child_iter);
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}
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return *this;
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}
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bool
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XMLNode::operator== (const XMLNode& other) const
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{
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if (is_content () != other.is_content ()) {
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return false;
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}
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if (is_content ()) {
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if (content () != other.content ()) {
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return false;
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}
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} else {
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if (name () != other.name ()) {
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return false;
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}
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}
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XMLPropertyList const& other_properties = other.properties ();
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if (_proplist.size () != other_properties.size ()) {
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return false;
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}
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XMLPropertyConstIterator our_prop_iter = _proplist.begin();
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XMLPropertyConstIterator other_prop_iter = other_properties.begin();
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while (our_prop_iter != _proplist.end ()) {
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XMLProperty const* our_prop = *our_prop_iter;
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XMLProperty const* other_prop = *other_prop_iter;
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if (our_prop->name () != other_prop->name () || our_prop->value () != other_prop->value ()) {
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return false;
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}
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++our_prop_iter;
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++other_prop_iter;
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}
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XMLNodeList const& other_children = other.children();
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if (_children.size() != other_children.size()) {
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return false;
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}
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XMLNodeConstIterator our_child_iter = _children.begin ();
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XMLNodeConstIterator other_child_iter = other_children.begin ();
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while (our_child_iter != _children.end()) {
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XMLNode const* our_child = *our_child_iter;
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XMLNode const* other_child = *other_child_iter;
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if (*our_child != *other_child) {
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return false;
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}
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++our_child_iter;
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++other_child_iter;
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}
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return true;
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}
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bool
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XMLNode::operator!= (const XMLNode& other) const
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{
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return !(*this == other);
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}
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const string&
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XMLNode::set_content(const string& c)
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{
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if (c.empty()) {
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_is_content = false;
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} else {
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_is_content = true;
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}
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_content = c;
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return _content;
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}
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XMLNode*
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XMLNode::child (const char* name) const
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{
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/* returns first child matching name */
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XMLNodeConstIterator cur;
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if (name == 0) {
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return 0;
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}
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for (cur = _children.begin(); cur != _children.end(); ++cur) {
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if ((*cur)->name() == name) {
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return *cur;
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}
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}
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return 0;
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}
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const XMLNodeList&
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XMLNode::children(const string& n) const
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{
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/* returns all children matching name */
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XMLNodeConstIterator cur;
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if (n.empty()) {
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return _children;
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}
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_selected_children.clear();
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for (cur = _children.begin(); cur != _children.end(); ++cur) {
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if ((*cur)->name() == n) {
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_selected_children.insert(_selected_children.end(), *cur);
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}
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}
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return _selected_children;
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}
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XMLNode*
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XMLNode::add_child(const char* n)
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{
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return add_child_copy(XMLNode (n));
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}
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void
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XMLNode::add_child_nocopy(XMLNode& n)
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{
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_children.insert(_children.end(), &n);
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}
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XMLNode*
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XMLNode::add_child_copy(const XMLNode& n)
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{
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XMLNode *copy = new XMLNode(n);
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_children.insert(_children.end(), copy);
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return copy;
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}
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boost::shared_ptr<XMLSharedNodeList>
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XMLTree::find(const string xpath, XMLNode* node) const
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{
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xmlXPathContext* ctxt;
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xmlDocPtr doc = 0;
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if (node) {
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doc = xmlNewDoc(xml_version);
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writenode(doc, node, doc->children, 1);
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ctxt = xmlXPathNewContext(doc);
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} else {
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ctxt = xmlXPathNewContext(_doc);
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}
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boost::shared_ptr<XMLSharedNodeList> result =
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boost::shared_ptr<XMLSharedNodeList>(find_impl(ctxt, xpath));
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xmlXPathFreeContext(ctxt);
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if (doc) {
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xmlFreeDoc (doc);
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}
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return result;
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}
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std::string
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XMLNode::attribute_value()
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{
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XMLNodeList children = this->children();
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if (_is_content)
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throw XMLException("XMLNode: attribute_value failed (is_content) for requested node: " + name());
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if (children.size() != 1)
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throw XMLException("XMLNode: attribute_value failed (children.size != 1) for requested node: " + name());
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XMLNode* child = *(children.begin());
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if (!child->is_content())
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throw XMLException("XMLNode: attribute_value failed (!child->is_content()) for requested node: " + name());
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return child->content();
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}
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XMLNode*
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XMLNode::add_content(const string& c)
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{
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return add_child_copy(XMLNode (string(), c));
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}
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XMLProperty const *
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XMLNode::property(const char* name) const
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{
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XMLPropertyConstIterator iter = _proplist.begin();
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while (iter != _proplist.end()) {
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if ((*iter)->name() == name) {
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return *iter;
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}
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++iter;
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}
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return 0;
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}
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XMLProperty const *
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XMLNode::property(const string& name) const
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{
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XMLPropertyConstIterator iter = _proplist.begin();
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while (iter != _proplist.end()) {
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if ((*iter)->name() == name) {
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return *iter;
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}
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++iter;
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}
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return 0;
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}
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XMLProperty *
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XMLNode::property(const char* name)
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{
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XMLPropertyIterator iter = _proplist.begin();
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while (iter != _proplist.end()) {
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if ((*iter)->name() == name) {
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return *iter;
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}
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++iter;
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}
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return 0;
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}
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XMLProperty *
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XMLNode::property(const string& name)
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{
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XMLPropertyIterator iter = _proplist.begin();
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while (iter != _proplist.end()) {
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if ((*iter)->name() == name) {
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return *iter;
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}
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++iter;
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}
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return 0;
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}
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bool
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XMLNode::has_property_with_value (const string& name, const string& value) const
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{
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XMLPropertyConstIterator iter = _proplist.begin();
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while (iter != _proplist.end()) {
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if ((*iter)->name() == name && (*iter)->value() == value) {
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return true;
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}
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++iter;
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}
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return false;
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}
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bool
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XMLNode::set_property(const char* name, const string& value)
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{
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XMLPropertyIterator iter = _proplist.begin();
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while (iter != _proplist.end()) {
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if ((*iter)->name() == name) {
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(*iter)->set_value (value);
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return *iter;
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}
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++iter;
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}
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XMLProperty* new_property = new XMLProperty(name, value);
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if (!new_property) {
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return 0;
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}
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_proplist.insert(_proplist.end(), new_property);
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return new_property;
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}
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bool
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XMLNode::get_property(const char* name, std::string& value) const
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{
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XMLProperty const* const prop = property (name);
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if (!prop)
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return false;
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value = prop->value ();
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return true;
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}
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void
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XMLNode::remove_property(const string& name)
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{
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XMLPropertyIterator iter = _proplist.begin();
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while (iter != _proplist.end()) {
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if ((*iter)->name() == name) {
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XMLProperty* property = *iter;
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_proplist.erase (iter);
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delete property;
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break;
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}
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++iter;
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}
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}
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/** Remove any property with the given name from this node and its children */
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void
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XMLNode::remove_property_recursively(const string& n)
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{
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remove_property (n);
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for (XMLNodeIterator i = _children.begin(); i != _children.end(); ++i) {
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(*i)->remove_property_recursively (n);
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}
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}
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void
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XMLNode::remove_nodes(const string& n)
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{
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XMLNodeIterator i = _children.begin();
|
|
while (i != _children.end()) {
|
|
if ((*i)->name() == n) {
|
|
i = _children.erase (i);
|
|
} else {
|
|
++i;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
XMLNode::remove_nodes_and_delete(const string& n)
|
|
{
|
|
XMLNodeIterator i = _children.begin();
|
|
|
|
while (i != _children.end()) {
|
|
if ((*i)->name() == n) {
|
|
delete *i;
|
|
i = _children.erase (i);
|
|
} else {
|
|
++i;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
XMLNode::remove_nodes_and_delete(const string& propname, const string& val)
|
|
{
|
|
XMLNodeIterator i = _children.begin();
|
|
XMLProperty const * prop;
|
|
|
|
while (i != _children.end()) {
|
|
prop = (*i)->property(propname);
|
|
if (prop && prop->value() == val) {
|
|
delete *i;
|
|
i = _children.erase(i);
|
|
} else {
|
|
++i;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
XMLNode::remove_node_and_delete(const string& n, const string& propname,
|
|
const string& val)
|
|
{
|
|
for (XMLNodeIterator i = _children.begin(); i != _children.end(); ++i) {
|
|
if ((*i)->name() == n) {
|
|
XMLProperty const * prop = (*i)->property (propname);
|
|
if (prop && prop->value() == val) {
|
|
delete *i;
|
|
_children.erase (i);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
XMLProperty::XMLProperty(const string& n, const string& v)
|
|
: _name(n)
|
|
, _value(v)
|
|
{
|
|
}
|
|
|
|
XMLProperty::~XMLProperty()
|
|
{
|
|
}
|
|
|
|
static XMLNode*
|
|
readnode(xmlNodePtr node)
|
|
{
|
|
string name, content;
|
|
xmlNodePtr child;
|
|
XMLNode* tmp;
|
|
xmlAttrPtr attr;
|
|
|
|
if (node->name) {
|
|
name = (const char*)node->name;
|
|
}
|
|
|
|
tmp = new XMLNode(name);
|
|
|
|
for (attr = node->properties; attr; attr = attr->next) {
|
|
content = "";
|
|
if (attr->children) {
|
|
content = (char*)attr->children->content;
|
|
}
|
|
tmp->set_property((const char*)attr->name, content);
|
|
}
|
|
|
|
if (node->content) {
|
|
tmp->set_content((char*)node->content);
|
|
} else {
|
|
tmp->set_content(string());
|
|
}
|
|
|
|
for (child = node->children; child; child = child->next) {
|
|
tmp->add_child_nocopy (*readnode(child));
|
|
}
|
|
|
|
return tmp;
|
|
}
|
|
|
|
static void
|
|
writenode(xmlDocPtr doc, XMLNode* n, xmlNodePtr p, int root = 0)
|
|
{
|
|
xmlNodePtr node;
|
|
|
|
if (root) {
|
|
node = doc->children = xmlNewDocNode(doc, 0, (const xmlChar*) n->name().c_str(), 0);
|
|
} else {
|
|
node = xmlNewChild(p, 0, (const xmlChar*) n->name().c_str(), 0);
|
|
}
|
|
|
|
if (n->is_content()) {
|
|
node->type = XML_TEXT_NODE;
|
|
xmlNodeSetContentLen(node, (const xmlChar*)n->content().c_str(), n->content().length());
|
|
}
|
|
|
|
const XMLPropertyList& props = n->properties();
|
|
|
|
for (XMLPropertyConstIterator prop_iter = props.begin (); prop_iter != props.end ();
|
|
++prop_iter) {
|
|
xmlSetProp (node, (const xmlChar*)(*prop_iter)->name ().c_str (),
|
|
(const xmlChar*)(*prop_iter)->value ().c_str ());
|
|
}
|
|
|
|
const XMLNodeList& children = n->children ();
|
|
for (XMLNodeConstIterator child_iter = children.begin (); child_iter != children.end ();
|
|
++child_iter) {
|
|
writenode (doc, *child_iter, node);
|
|
}
|
|
}
|
|
|
|
static XMLSharedNodeList* find_impl(xmlXPathContext* ctxt, const string& xpath)
|
|
{
|
|
xmlXPathObject* result = xmlXPathEval((const xmlChar*)xpath.c_str(), ctxt);
|
|
|
|
if (!result) {
|
|
xmlXPathFreeContext(ctxt);
|
|
xmlFreeDoc(ctxt->doc);
|
|
|
|
throw XMLException("Invalid XPath: " + xpath);
|
|
}
|
|
|
|
if (result->type != XPATH_NODESET) {
|
|
xmlXPathFreeObject(result);
|
|
xmlXPathFreeContext(ctxt);
|
|
xmlFreeDoc(ctxt->doc);
|
|
|
|
throw XMLException("Only nodeset result types are supported.");
|
|
}
|
|
|
|
xmlNodeSet* nodeset = result->nodesetval;
|
|
XMLSharedNodeList* nodes = new XMLSharedNodeList();
|
|
if (nodeset) {
|
|
for (int i = 0; i < nodeset->nodeNr; ++i) {
|
|
XMLNode* node = readnode(nodeset->nodeTab[i]);
|
|
nodes->push_back(boost::shared_ptr<XMLNode>(node));
|
|
}
|
|
} else {
|
|
// return empty set
|
|
}
|
|
|
|
xmlXPathFreeObject(result);
|
|
|
|
return nodes;
|
|
}
|
|
|
|
/** Dump a node, its properties and children to a stream */
|
|
void
|
|
XMLNode::dump (ostream& s, string p) const
|
|
{
|
|
if (_is_content) {
|
|
s << p << " " << content() << "\n";
|
|
} else {
|
|
s << p << "<" << _name;
|
|
for (XMLPropertyList::const_iterator i = _proplist.begin(); i != _proplist.end(); ++i) {
|
|
s << " " << (*i)->name() << "=\"" << (*i)->value() << "\"";
|
|
}
|
|
s << ">\n";
|
|
|
|
for (XMLNodeList::const_iterator i = _children.begin(); i != _children.end(); ++i) {
|
|
(*i)->dump (s, p + " ");
|
|
}
|
|
|
|
s << p << "</" << _name << ">\n";
|
|
}
|
|
}
|