Method allocate_string

external/pugixml/pugixml.cpp:317–341

		}

		char_t* allocate_string(size_t length)
		{
			// allocate memory for string and header block
			size_t size = sizeof(xml_memory_string_header) + length * sizeof(char_t);
			
			// round size up to pointer alignment boundary
			size_t full_size = (size + (sizeof(void*) - 1)) & ~(sizeof(void*) - 1);

			xml_memory_page* page;
			xml_memory_string_header* header = static_cast<xml_memory_string_header*>(allocate_memory(full_size, page));

			if (!header) return 0;

			// setup header
			ptrdiff_t page_offset = reinterpret_cast<char*>(header) - page->data;

			assert(page_offset >= 0 && page_offset < (1 << 16));
			header->page_offset = static_cast<uint16_t>(page_offset);

			// full_size == 0 for large strings that occupy the whole page
			assert(full_size < (1 << 16) || (page->busy_size == full_size && page_offset == 0));
			header->full_size = static_cast<uint16_t>(full_size < (1 << 16) ? full_size : 0);

			return reinterpret_cast<char_t*>(header + 1);
		}

		void deallocate_string(char_t* string)
		{