591 lines
11 KiB
C++
591 lines
11 KiB
C++
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/* 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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*/
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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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#define XML_VERSION "1.0"
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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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_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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_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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{
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_filename = from->filename();
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_root = new XMLNode(*from->root());
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_compression = from->compression();
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}
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XMLTree::~XMLTree()
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{
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if (_root) {
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delete _root;
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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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if (_root) {
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delete _root;
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_root = 0;
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}
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xmlParserCtxtPtr ctxt; /* the parser context */
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xmlDocPtr doc; /* the resulting document tree */
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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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/* create a parser context */
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ctxt = xmlNewParserCtxt();
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if (ctxt == NULL) {
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return false;
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}
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doc = xmlCtxtReadFile(ctxt, _filename.c_str(), NULL, XML_PARSE_DTDVALID);
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} else {
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doc = xmlParseFile(_filename.c_str());
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}
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/* check if parsing suceeded */
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if (doc == NULL) {
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if(validate) {
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xmlFreeParserCtxt(ctxt);
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}
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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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xmlFreeDoc(doc);
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xmlCleanupParser();
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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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if(validate) {
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xmlFreeParserCtxt(ctxt);
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}
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xmlFreeDoc(doc);
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xmlCleanupParser();
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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)
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{
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xmlDocPtr doc;
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_filename = "";
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if (_root) {
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delete _root;
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_root = 0;
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}
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doc = xmlParseMemory((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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xmlFreeDoc(doc);
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return true;
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}
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bool
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XMLTree::write(void) 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((xmlChar *) 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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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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xmlDocPtr doc;
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XMLNodeList children;
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xmlKeepBlanksDefault(0);
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doc = xmlNewDoc((xmlChar *) 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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}
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const string &
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XMLTree::write_buffer(void) 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((xmlChar *) 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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XMLNode::XMLNode(const string & n)
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: _name(n), _is_content(false), _content(string())
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{
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}
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XMLNode::XMLNode(const string & n, const string & c)
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:_name(n), _is_content(true), _content(c)
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{
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}
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XMLNode::XMLNode(const XMLNode& from)
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{
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XMLPropertyList props;
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XMLPropertyIterator curprop;
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XMLNodeList nodes;
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XMLNodeIterator curnode;
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_name = from.name();
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set_content(from.content());
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props = from.properties();
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for (curprop = props.begin(); curprop != props.end(); ++curprop) {
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add_property((*curprop)->name().c_str(), (*curprop)->value());
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}
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nodes = from.children();
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for (curnode = nodes.begin(); curnode != nodes.end(); ++curnode) {
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add_child_copy(**curnode);
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}
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}
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XMLNode::~XMLNode()
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{
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XMLNodeIterator curchild;
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XMLPropertyIterator curprop;
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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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for (curprop = _proplist.begin(); curprop != _proplist.end(); ++curprop) {
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delete *curprop;
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}
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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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static XMLNodeList retval;
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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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retval.erase(retval.begin(), retval.end());
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for (cur = _children.begin(); cur != _children.end(); ++cur) {
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if ((*cur)->name() == n) {
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retval.insert(retval.end(), *cur);
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}
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}
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return retval;
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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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XMLNode::find(const string xpath) const
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{
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xmlDocPtr doc = xmlNewDoc((xmlChar *) XML_VERSION);
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writenode(doc, (XMLNode *) this, doc->children, 1);
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xmlXPathContext* ctxt = xmlXPathNewContext(doc);
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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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xmlFreeDoc(doc);
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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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assert(!_is_content);
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assert(children.size() == 1);
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XMLNode* child = *(children.begin());
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assert(child->is_content());
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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 *
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XMLNode::property(const char * n)
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{
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string ns(n);
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map<string,XMLProperty*>::iterator iter;
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if ((iter = _propmap.find(ns)) != _propmap.end()) {
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return iter->second;
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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 & ns)
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{
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map<string,XMLProperty*>::iterator iter;
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if ((iter = _propmap.find(ns)) != _propmap.end()) {
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return iter->second;
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}
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return 0;
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}
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XMLProperty *
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XMLNode::add_property(const char * n, const string & v)
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{
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string ns(n);
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if(_propmap.find(ns) != _propmap.end()){
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remove_property(ns);
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}
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XMLProperty *tmp = new XMLProperty(ns, v);
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if (!tmp) {
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return 0;
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}
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_propmap[tmp->name()] = tmp;
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_proplist.insert(_proplist.end(), tmp);
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return tmp;
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}
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XMLProperty *
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XMLNode::add_property(const char * n, const char * v)
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{
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string vs(v);
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return add_property(n, vs);
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}
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XMLProperty *
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XMLNode::add_property(const char *name, const long value)
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{
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static char str[1024];
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snprintf(str, 1024, "%ld", value);
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return add_property(name, str);
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}
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void
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XMLNode::remove_property(const string & n)
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{
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if (_propmap.find(n) != _propmap.end()) {
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_proplist.remove(_propmap[n]);
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_propmap.erase(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();
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XMLNodeIterator tmp;
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while (i != _children.end()) {
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tmp = i;
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++tmp;
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|
|
if ((*i)->name() == n) {
|
||
|
|
_children.erase (i);
|
||
|
|
}
|
||
|
|
i = tmp;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
XMLNode::remove_nodes_and_delete(const string & n)
|
||
|
|
{
|
||
|
|
XMLNodeIterator i = _children.begin();
|
||
|
|
XMLNodeIterator tmp;
|
||
|
|
|
||
|
|
while (i != _children.end()) {
|
||
|
|
tmp = i;
|
||
|
|
++tmp;
|
||
|
|
if ((*i)->name() == n) {
|
||
|
|
delete *i;
|
||
|
|
_children.erase (i);
|
||
|
|
}
|
||
|
|
i = tmp;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
XMLNode::remove_nodes_and_delete(const string& propname, const string& val)
|
||
|
|
{
|
||
|
|
XMLNodeIterator i = _children.begin();
|
||
|
|
XMLNodeIterator tmp;
|
||
|
|
XMLProperty* prop;
|
||
|
|
|
||
|
|
while (i != _children.end()) {
|
||
|
|
tmp = i;
|
||
|
|
++tmp;
|
||
|
|
|
||
|
|
prop = (*i)->property(propname);
|
||
|
|
if(prop && prop->value() == val) {
|
||
|
|
delete *i;
|
||
|
|
_children.erase(i);
|
||
|
|
}
|
||
|
|
|
||
|
|
i = tmp;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
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 = (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->add_property((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)
|
||
|
|
{
|
||
|
|
XMLPropertyList props;
|
||
|
|
XMLPropertyIterator curprop;
|
||
|
|
XMLNodeList children;
|
||
|
|
XMLNodeIterator curchild;
|
||
|
|
xmlNodePtr node;
|
||
|
|
|
||
|
|
if (root) {
|
||
|
|
node = doc->children = xmlNewDocNode(doc, 0, (xmlChar *) n->name().c_str(), 0);
|
||
|
|
} else {
|
||
|
|
node = xmlNewChild(p, 0, (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());
|
||
|
|
}
|
||
|
|
|
||
|
|
props = n->properties();
|
||
|
|
for (curprop = props.begin(); curprop != props.end(); ++curprop) {
|
||
|
|
xmlSetProp(node, (xmlChar *) (*curprop)->name().c_str(), (xmlChar *) (*curprop)->value().c_str());
|
||
|
|
}
|
||
|
|
|
||
|
|
children = n->children();
|
||
|
|
for (curchild = children.begin(); curchild != children.end(); ++curchild) {
|
||
|
|
writenode(doc, *curchild, 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;
|
||
|
|
}
|
||
|
|
|