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-rw-r--r--src/pugixml.cpp105
1 files changed, 105 insertions, 0 deletions
diff --git a/src/pugixml.cpp b/src/pugixml.cpp
index b9e54fe..36457b7 100644
--- a/src/pugixml.cpp
+++ b/src/pugixml.cpp
@@ -6830,6 +6830,25 @@ namespace pugi
_destroy();
}
+#ifdef PUGIXML_HAS_MOVE
+ PUGI__FN xml_document::xml_document(xml_document&& rhs): _buffer(0)
+ {
+ _create();
+ _move(rhs);
+ }
+
+ PUGI__FN xml_document& xml_document::operator=(xml_document&& rhs)
+ {
+ if (this == &rhs) return *this;
+
+ _destroy();
+ _create();
+ _move(rhs);
+
+ return *this;
+ }
+#endif
+
PUGI__FN void xml_document::reset()
{
_destroy();
@@ -6925,6 +6944,92 @@ namespace pugi
_root = 0;
}
+#ifdef PUGIXML_HAS_MOVE
+ PUGI__FN void xml_document::_move(xml_document& rhs)
+ {
+ impl::xml_document_struct* doc = static_cast<impl::xml_document_struct*>(_root);
+ impl::xml_document_struct* other = static_cast<impl::xml_document_struct*>(rhs._root);
+
+ // move allocation state
+ doc->_root = other->_root;
+ doc->_busy_size = other->_busy_size;
+
+ // move buffer state
+ doc->buffer = other->buffer;
+ doc->extra_buffers = other->extra_buffers;
+ _buffer = rhs._buffer;
+
+ // save first child pointer for later; this needs hash access
+ xml_node_struct* other_first_child = other->first_child;
+
+ #ifdef PUGIXML_COMPACT
+ // move compact hash
+ // TODO: the hash still has pointers to other, do we need to clear them out?
+ doc->hash = other->hash;
+ doc->_hash = &doc->hash;
+
+ // make sure we don't access other hash up until the end when we reinitialize other document
+ other->_hash = 0;
+ #endif
+
+ // move page structure
+ impl::xml_memory_page* doc_page = PUGI__GETPAGE(doc);
+ assert(doc_page && !doc_page->prev && !doc_page->next);
+
+ impl::xml_memory_page* other_page = PUGI__GETPAGE(other);
+ assert(other_page && !other_page->prev);
+
+ // relink pages since root page is embedded into xml_document
+ if (impl::xml_memory_page* page = other_page->next)
+ {
+ assert(page->prev == other_page);
+
+ page->prev = doc_page;
+
+ doc_page->next = page;
+ other_page->next = 0;
+ }
+
+ // make sure pages point to the correct document state
+ for (impl::xml_memory_page* page = doc_page->next; page; page = page->next)
+ {
+ assert(page->allocator == other);
+
+ page->allocator = doc;
+
+ #ifdef PUGIXML_COMPACT
+ // this automatically migrates most children between documents and prevents ->parent assignment from allocating
+ if (page->compact_shared_parent == other)
+ page->compact_shared_parent = doc;
+ #endif
+ }
+
+ // move tree structure
+ assert(!doc->first_child);
+
+ doc->reserve(); // TODO: it's not clear how to handle reserve running out of memory
+ doc->first_child = other_first_child;
+
+ for (xml_node_struct* child = other_first_child; child; child = child->next_sibling)
+ {
+ #ifdef PUGIXML_COMPACT
+ // most children will have migrated when we reassigned compact_shared_parent
+ assert(child->parent == other || child->parent == doc);
+
+ doc->reserve(); // TODO: it's not clear how to handle reserve running out of memory
+ child->parent = doc;
+ #else
+ assert(child->parent == other);
+ child->parent = doc;
+ #endif
+ }
+
+ // reset other document
+ new (other) impl::xml_document_struct(PUGI__GETPAGE(other));
+ rhs._buffer = 0;
+ }
+#endif
+
#ifndef PUGIXML_NO_STL
PUGI__FN xml_parse_result xml_document::load(std::basic_istream<char, std::char_traits<char> >& stream, unsigned int options, xml_encoding encoding)
{