diff options
| -rw-r--r-- | src/pugixml.cpp | 98 |
1 files changed, 82 insertions, 16 deletions
diff --git a/src/pugixml.cpp b/src/pugixml.cpp index 677ae7b..7a8d7c1 100644 --- a/src/pugixml.cpp +++ b/src/pugixml.cpp @@ -309,9 +309,7 @@ PUGI__NS_BEGIN void** insert(const void* key, size_t tag) { assert(key); - - if (_count >= _capacity * 3 / 4) - rehash(); + assert(_count < _capacity * 3 / 4); size_t hashmod = _capacity - 1; size_t bucket = hash(key) & hashmod; @@ -341,6 +339,14 @@ PUGI__NS_BEGIN return 0; } + bool reserve() + { + if (_count + 16 >= _capacity * 3 / 4) + return rehash(); + + return true; + } + private: struct item_t { @@ -353,13 +359,14 @@ PUGI__NS_BEGIN size_t _count; - void rehash() + bool rehash() { compact_hash_table rt; - rt._capacity = (_capacity == 0) ? 256 : _capacity * 2; + rt._capacity = (_capacity == 0) ? 32 : _capacity * 2; rt._items = static_cast<item_t*>(xml_memory::allocate(sizeof(item_t) * rt._capacity)); - assert(rt._items); + if (!rt._items) + return false; memset(rt._items, 0, sizeof(item_t) * rt._capacity); @@ -372,6 +379,8 @@ PUGI__NS_BEGIN _capacity = rt._capacity; _items = rt._items; + + return true; } // http://burtleburtle.net/bob/hash/integer.html @@ -593,6 +602,15 @@ PUGI__NS_BEGIN deallocate_memory(header, full_size, page); } + bool reserve() + { + #ifdef PUGIXML_COMPACT + return _hash->reserve(); + #else + return true; + #endif + } + xml_memory_page* _root; size_t _busy_size; @@ -1269,6 +1287,8 @@ PUGI__NS_BEGIN PUGI__FN_NO_INLINE xml_node_struct* append_new_node(xml_node_struct* node, xml_allocator& alloc, xml_node_type type = node_element) { + if (!alloc.reserve()) return 0; + xml_node_struct* child = allocate_node(alloc, type); if (!child) return 0; @@ -1279,6 +1299,8 @@ PUGI__NS_BEGIN PUGI__FN_NO_INLINE xml_attribute_struct* append_new_attribute(xml_node_struct* node, xml_allocator& alloc) { + if (!alloc.reserve()) return 0; + xml_attribute_struct* attr = allocate_attribute(alloc); if (!attr) return 0; @@ -2252,6 +2274,8 @@ PUGI__NS_BEGIN { xml_allocator* alloc = reinterpret_cast<xml_memory_page*>(header & xml_memory_page_pointer_mask)->allocator; + if (!alloc->reserve()) return false; + // allocate new buffer char_t* buf = alloc->allocate_string(source_length + 1); if (!buf) return false; @@ -5345,7 +5369,10 @@ namespace pugi { if (type() != node_element && type() != node_declaration) return xml_attribute(); - xml_attribute a(impl::allocate_attribute(impl::get_allocator(_root))); + impl::xml_allocator& alloc = impl::get_allocator(_root); + if (!alloc.reserve()) return xml_attribute(); + + xml_attribute a(impl::allocate_attribute(alloc)); if (!a) return xml_attribute(); impl::append_attribute(a._attr, _root); @@ -5359,7 +5386,10 @@ namespace pugi { if (type() != node_element && type() != node_declaration) return xml_attribute(); - xml_attribute a(impl::allocate_attribute(impl::get_allocator(_root))); + impl::xml_allocator& alloc = impl::get_allocator(_root); + if (!alloc.reserve()) return xml_attribute(); + + xml_attribute a(impl::allocate_attribute(alloc)); if (!a) return xml_attribute(); impl::prepend_attribute(a._attr, _root); @@ -5374,7 +5404,10 @@ namespace pugi if (type() != node_element && type() != node_declaration) return xml_attribute(); if (!attr || !impl::is_attribute_of(attr._attr, _root)) return xml_attribute(); - xml_attribute a(impl::allocate_attribute(impl::get_allocator(_root))); + impl::xml_allocator& alloc = impl::get_allocator(_root); + if (!alloc.reserve()) return xml_attribute(); + + xml_attribute a(impl::allocate_attribute(alloc)); if (!a) return xml_attribute(); impl::insert_attribute_before(a._attr, attr._attr, _root); @@ -5389,7 +5422,10 @@ namespace pugi if (type() != node_element && type() != node_declaration) return xml_attribute(); if (!attr || !impl::is_attribute_of(attr._attr, _root)) return xml_attribute(); - xml_attribute a(impl::allocate_attribute(impl::get_allocator(_root))); + impl::xml_allocator& alloc = impl::get_allocator(_root); + if (!alloc.reserve()) return xml_attribute(); + + xml_attribute a(impl::allocate_attribute(alloc)); if (!a) return xml_attribute(); impl::insert_attribute_after(a._attr, attr._attr, _root); @@ -5443,7 +5479,10 @@ namespace pugi { if (!impl::allow_insert_child(this->type(), type_)) return xml_node(); - xml_node n(impl::allocate_node(impl::get_allocator(_root), type_)); + impl::xml_allocator& alloc = impl::get_allocator(_root); + if (!alloc.reserve()) return xml_node(); + + xml_node n(impl::allocate_node(alloc, type_)); if (!n) return xml_node(); impl::append_node(n._root, _root); @@ -5456,8 +5495,11 @@ namespace pugi PUGI__FN xml_node xml_node::prepend_child(xml_node_type type_) { if (!impl::allow_insert_child(this->type(), type_)) return xml_node(); + + impl::xml_allocator& alloc = impl::get_allocator(_root); + if (!alloc.reserve()) return xml_node(); - xml_node n(impl::allocate_node(impl::get_allocator(_root), type_)); + xml_node n(impl::allocate_node(alloc, type_)); if (!n) return xml_node(); impl::prepend_node(n._root, _root); @@ -5471,8 +5513,11 @@ namespace pugi { if (!impl::allow_insert_child(this->type(), type_)) return xml_node(); if (!node._root || node._root->parent != _root) return xml_node(); + + impl::xml_allocator& alloc = impl::get_allocator(_root); + if (!alloc.reserve()) return xml_node(); - xml_node n(impl::allocate_node(impl::get_allocator(_root), type_)); + xml_node n(impl::allocate_node(alloc, type_)); if (!n) return xml_node(); impl::insert_node_before(n._root, node._root); @@ -5486,8 +5531,11 @@ namespace pugi { if (!impl::allow_insert_child(this->type(), type_)) return xml_node(); if (!node._root || node._root->parent != _root) return xml_node(); + + impl::xml_allocator& alloc = impl::get_allocator(_root); + if (!alloc.reserve()) return xml_node(); - xml_node n(impl::allocate_node(impl::get_allocator(_root), type_)); + xml_node n(impl::allocate_node(alloc, type_)); if (!n) return xml_node(); impl::insert_node_after(n._root, node._root); @@ -5573,6 +5621,9 @@ namespace pugi { if (!impl::allow_move(*this, moved)) return xml_node(); + impl::xml_allocator& alloc = impl::get_allocator(_root); + if (!alloc.reserve()) return xml_node(); + // disable document_buffer_order optimization since moving nodes around changes document order without changing buffer pointers impl::get_document(_root).header |= impl::xml_memory_page_contents_shared_mask; @@ -5586,6 +5637,9 @@ namespace pugi { if (!impl::allow_move(*this, moved)) return xml_node(); + impl::xml_allocator& alloc = impl::get_allocator(_root); + if (!alloc.reserve()) return xml_node(); + // disable document_buffer_order optimization since moving nodes around changes document order without changing buffer pointers impl::get_document(_root).header |= impl::xml_memory_page_contents_shared_mask; @@ -5601,6 +5655,9 @@ namespace pugi if (!node._root || node._root->parent != _root) return xml_node(); if (moved._root == node._root) return xml_node(); + impl::xml_allocator& alloc = impl::get_allocator(_root); + if (!alloc.reserve()) return xml_node(); + // disable document_buffer_order optimization since moving nodes around changes document order without changing buffer pointers impl::get_document(_root).header |= impl::xml_memory_page_contents_shared_mask; @@ -5616,6 +5673,9 @@ namespace pugi if (!node._root || node._root->parent != _root) return xml_node(); if (moved._root == node._root) return xml_node(); + impl::xml_allocator& alloc = impl::get_allocator(_root); + if (!alloc.reserve()) return xml_node(); + // disable document_buffer_order optimization since moving nodes around changes document order without changing buffer pointers impl::get_document(_root).header |= impl::xml_memory_page_contents_shared_mask; @@ -5635,8 +5695,11 @@ namespace pugi if (!_root || !a._attr) return false; if (!impl::is_attribute_of(a._attr, _root)) return false; + impl::xml_allocator& alloc = impl::get_allocator(_root); + if (!alloc.reserve()) return false; + impl::remove_attribute(a._attr, _root); - impl::destroy_attribute(a._attr, impl::get_allocator(_root)); + impl::destroy_attribute(a._attr, alloc); return true; } @@ -5650,8 +5713,11 @@ namespace pugi { if (!_root || !n._root || n._root->parent != _root) return false; + impl::xml_allocator& alloc = impl::get_allocator(_root); + if (!alloc.reserve()) return false; + impl::remove_node(n._root); - impl::destroy_node(n._root, impl::get_allocator(_root)); + impl::destroy_node(n._root, alloc); return true; } |