7f91301946
This utilizes the fact that pages are of limited size so we can store offset from the object to the page in a few bits - we currently use 24 although that's excessive given that pages are limited to ~512k. This has several benefits: - Pages do not have to be 64b aligned any more - this simplifies allocation flow and frees up 40-50 bytes from xml_document::_memory. - Header now has 8 bits available for metadata for both compact and default mode which makes it possible to store type as-is (allowing easy type extension and removing one add/sub operation from type checks). - One extra bit is easily available for future metadata extension (in addition to the bit for type encoding that could be reclaimed if necessary). - Allocators that return 4b-aligned memory on 64-bit platforms work fine if misaligned reads are supported. The downside is that there is one or two extra instructions on the allocation path. This does not seem to hurt parsing performance. |
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pugixml 
pugixml is a C++ XML processing library, which consists of a DOM-like interface with rich traversal/modification capabilities, an extremely fast XML parser which constructs the DOM tree from an XML file/buffer, and an XPath 1.0 implementation for complex data-driven tree queries. Full Unicode support is also available, with Unicode interface variants and conversions between different Unicode encodings (which happen automatically during parsing/saving).
pugixml is used by a lot of projects, both open-source and proprietary, for performance and easy-to-use interface.
Documentation
Documentation for the current release of pugixml is available on-line as two separate documents:
- Quick-start guide, that aims to provide enough information to start using the library;
- Complete reference manual, that describes all features of the library in detail.
You’re advised to start with the quick-start guide; however, many important library features are either not described in it at all or only mentioned briefly; if you require more information you should read the complete manual.
License
This library is available to anybody free of charge, under the terms of MIT License:
Copyright (c) 2006-2016 Arseny Kapoulkine
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.