From fd0853d2623dd278b08288331ed42e3be59252fb Mon Sep 17 00:00:00 2001 From: Daniel Wilhelm Date: Fri, 18 Apr 2014 17:00:17 +0200 Subject: 2.2 --- shared/tinyxml/readme.txt | 530 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 530 insertions(+) create mode 100644 shared/tinyxml/readme.txt (limited to 'shared/tinyxml/readme.txt') diff --git a/shared/tinyxml/readme.txt b/shared/tinyxml/readme.txt new file mode 100644 index 00000000..14ec3d2e --- /dev/null +++ b/shared/tinyxml/readme.txt @@ -0,0 +1,530 @@ +/** @mainpage + +

TinyXML

+ +TinyXML is a simple, small, C++ XML parser that can be easily +integrated into other programs. + +

What it does.

+ +In brief, TinyXML parses an XML document, and builds from that a +Document Object Model (DOM) that can be read, modified, and saved. + +XML stands for "eXtensible Markup Language." It allows you to create +your own document markups. Where HTML does a very good job of marking +documents for browsers, XML allows you to define any kind of document +markup, for example a document that describes a "to do" list for an +organizer application. XML is a very structured and convenient format. +All those random file formats created to store application data can +all be replaced with XML. One parser for everything. + +The best place for the complete, correct, and quite frankly hard to +read spec is at +http://www.w3.org/TR/2004/REC-xml-20040204/. An intro to XML +(that I really like) can be found at +http://skew.org/xml/tutorial. + +There are different ways to access and interact with XML data. +TinyXML uses a Document Object Model (DOM), meaning the XML data is parsed +into a C++ objects that can be browsed and manipulated, and then +written to disk or another output stream. You can also construct an XML document +from scratch with C++ objects and write this to disk or another output +stream. + +TinyXML is designed to be easy and fast to learn. It is two headers +and four cpp files. Simply add these to your project and off you go. +There is an example file - xmltest.cpp - to get you started. + +TinyXML is released under the ZLib license, +so you can use it in open source or commercial code. The details +of the license are at the top of every source file. + +TinyXML attempts to be a flexible parser, but with truly correct and +compliant XML output. TinyXML should compile on any reasonably C++ +compliant system. It does not rely on exceptions or RTTI. It can be +compiled with or without STL support. TinyXML fully supports +the UTF-8 encoding, and the first 64k character entities. + + +

What it doesn't do.

+ +TinyXML doesn't parse or use DTDs (Document Type Definitions) or XSLs +(eXtensible Stylesheet Language.) There are other parsers out there +(check out www.sourceforge.org, search for XML) that are much more fully +featured. But they are also much bigger, take longer to set up in +your project, have a higher learning curve, and often have a more +restrictive license. If you are working with browsers or have more +complete XML needs, TinyXML is not the parser for you. + +The following DTD syntax will not parse at this time in TinyXML: + +@verbatim + + ]> +@endverbatim + +because TinyXML sees this as a !DOCTYPE node with an illegally +embedded !ELEMENT node. This may be addressed in the future. + +

Tutorials.

+ +For the impatient, here is a tutorial to get you going. A great way to get started, +but it is worth your time to read this (very short) manual completely. + +- @subpage tutorial0 + +

Code Status.

+ +TinyXML is mature, tested code. It is very stable. If you find +bugs, please file a bug report on the sourceforge web site +(www.sourceforge.net/projects/tinyxml). We'll get them straightened +out as soon as possible. + +There are some areas of improvement; please check sourceforge if you are +interested in working on TinyXML. + +

Related Projects

+ +TinyXML projects you may find useful! (Descriptions provided by the projects.) + + + +

Features

+ +

Using STL

+ +TinyXML can be compiled to use or not use STL. When using STL, TinyXML +uses the std::string class, and fully supports std::istream, std::ostream, +operator<<, and operator>>. Many API methods have both 'const char*' and +'const std::string&' forms. + +When STL support is compiled out, no STL files are included whatsoever. All +the string classes are implemented by TinyXML itself. API methods +all use the 'const char*' form for input. + +Use the compile time #define: + + TIXML_USE_STL + +to compile one version or the other. This can be passed by the compiler, +or set as the first line of "tinyxml.h". + +Note: If compiling the test code in Linux, setting the environment +variable TINYXML_USE_STL=YES/NO will control STL compilation. In the +Windows project file, STL and non STL targets are provided. In your project, +It's probably easiest to add the line "#define TIXML_USE_STL" as the first +line of tinyxml.h. + +

UTF-8

+ +TinyXML supports UTF-8 allowing to manipulate XML files in any language. TinyXML +also supports "legacy mode" - the encoding used before UTF-8 support and +probably best described as "extended ascii". + +Normally, TinyXML will try to detect the correct encoding and use it. However, +by setting the value of TIXML_DEFAULT_ENCODING in the header file, TinyXML +can be forced to always use one encoding. + +TinyXML will assume Legacy Mode until one of the following occurs: +
    +
  1. If the non-standard but common "UTF-8 lead bytes" (0xef 0xbb 0xbf) + begin the file or data stream, TinyXML will read it as UTF-8.
    2. +
  2. If the declaration tag is read, and it has an encoding="UTF-8", then + TinyXML will read it as UTF-8.
    3. +
  3. If the declaration tag is read, and it has no encoding specified, then TinyXML will + read it as UTF-8.
    4. +
  4. If the declaration tag is read, and it has an encoding="something else", then TinyXML + will read it as Legacy Mode. In legacy mode, TinyXML will work as it did before. It's + not clear what that mode does exactly, but old content should keep working.
    5. +
  5. Until one of the above criteria is met, TinyXML runs in Legacy Mode.
    6. +
+ +What happens if the encoding is incorrectly set or detected? TinyXML will try +to read and pass through text seen as improperly encoded. You may get some strange results or +mangled characters. You may want to force TinyXML to the correct mode. + +You may force TinyXML to Legacy Mode by using LoadFile( TIXML_ENCODING_LEGACY ) or +LoadFile( filename, TIXML_ENCODING_LEGACY ). You may force it to use legacy mode all +the time by setting TIXML_DEFAULT_ENCODING = TIXML_ENCODING_LEGACY. Likewise, you may +force it to TIXML_ENCODING_UTF8 with the same technique. + +For English users, using English XML, UTF-8 is the same as low-ASCII. You +don't need to be aware of UTF-8 or change your code in any way. You can think +of UTF-8 as a "superset" of ASCII. + +UTF-8 is not a double byte format - but it is a standard encoding of Unicode! +TinyXML does not use or directly support wchar, TCHAR, or Microsoft's _UNICODE at this time. +It is common to see the term "Unicode" improperly refer to UTF-16, a wide byte encoding +of unicode. This is a source of confusion. + +For "high-ascii" languages - everything not English, pretty much - TinyXML can +handle all languages, at the same time, as long as the XML is encoded +in UTF-8. That can be a little tricky, older programs and operating systems +tend to use the "default" or "traditional" code page. Many apps (and almost all +modern ones) can output UTF-8, but older or stubborn (or just broken) ones +still output text in the default code page. + +For example, Japanese systems traditionally use SHIFT-JIS encoding. +Text encoded as SHIFT-JIS can not be read by TinyXML. +A good text editor can import SHIFT-JIS and then save as UTF-8. + +The Skew.org link does a great +job covering the encoding issue. + +The test file "utf8test.xml" is an XML containing English, Spanish, Russian, +and Simplified Chinese. (Hopefully they are translated correctly). The file +"utf8test.gif" is a screen capture of the XML file, rendered in IE. Note that +if you don't have the correct fonts (Simplified Chinese or Russian) on your +system, you won't see output that matches the GIF file even if you can parse +it correctly. Also note that (at least on my Windows machine) console output +is in a Western code page, so that Print() or printf() cannot correctly display +the file. This is not a bug in TinyXML - just an OS issue. No data is lost or +destroyed by TinyXML. The console just doesn't render UTF-8. + + +

Entities

+TinyXML recognizes the pre-defined "character entities", meaning special +characters. Namely: + +@verbatim + & & + < < + > > + " " + ' ' +@endverbatim + +These are recognized when the XML document is read, and translated to there +UTF-8 equivalents. For instance, text with the XML of: + +@verbatim + Far & Away +@endverbatim + +will have the Value() of "Far & Away" when queried from the TiXmlText object, +and will be written back to the XML stream/file as an ampersand. Older versions +of TinyXML "preserved" character entities, but the newer versions will translate +them into characters. + +Additionally, any character can be specified by its Unicode code point: +The syntax " " or " " are both to the non-breaking space characher. + +

Printing

+TinyXML can print output in several different ways that all have strengths and limitations. + +- Print( FILE* ). Output to a std-C stream, which includes all C files as well as stdout. + - "Pretty prints", but you don't have control over printing options. + - The output is streamed directly to the FILE object, so there is no memory overhead + in the TinyXML code. + - used by Print() and SaveFile() + +- operator<<. Output to a c++ stream. + - Integrates with standart C++ iostreams. + - Outputs in "network printing" mode without line breaks. Good for network transmission + and moving XML between C++ objects, but hard for a human to read. + +- TiXmlPrinter. Output to a std::string or memory buffer. + - API is less concise + - Future printing options will be put here. + - Printing may change slightly in future versions as it is refined and expanded. + +

Streams

+With TIXML_USE_STL on TinyXML supports C++ streams (operator <<,>>) streams as well +as C (FILE*) streams. There are some differences that you may need to be aware of. + +C style output: + - based on FILE* + - the Print() and SaveFile() methods + + Generates formatted output, with plenty of white space, intended to be as + human-readable as possible. They are very fast, and tolerant of ill formed + XML documents. For example, an XML document that contains 2 root elements + and 2 declarations, will still print. + +C style input: + - based on FILE* + - the Parse() and LoadFile() methods + + A fast, tolerant read. Use whenever you don't need the C++ streams. + +C++ style output: + - based on std::ostream + - operator<< + + Generates condensed output, intended for network transmission rather than + readability. Depending on your system's implementation of the ostream class, + these may be somewhat slower. (Or may not.) Not tolerant of ill formed XML: + a document should contain the correct one root element. Additional root level + elements will not be streamed out. + +C++ style input: + - based on std::istream + - operator>> + + Reads XML from a stream, making it useful for network transmission. The tricky + part is knowing when the XML document is complete, since there will almost + certainly be other data in the stream. TinyXML will assume the XML data is + complete after it reads the root element. Put another way, documents that + are ill-constructed with more than one root element will not read correctly. + Also note that operator>> is somewhat slower than Parse, due to both + implementation of the STL and limitations of TinyXML. + +

White space

+The world simply does not agree on whether white space should be kept, or condensed. +For example, pretend the '_' is a space, and look at "Hello____world". HTML, and +at least some XML parsers, will interpret this as "Hello_world". They condense white +space. Some XML parsers do not, and will leave it as "Hello____world". (Remember +to keep pretending the _ is a space.) Others suggest that __Hello___world__ should become +Hello___world. + +It's an issue that hasn't been resolved to my satisfaction. TinyXML supports the +first 2 approaches. Call TiXmlBase::SetCondenseWhiteSpace( bool ) to set the desired behavior. +The default is to condense white space. + +If you change the default, you should call TiXmlBase::SetCondenseWhiteSpace( bool ) +before making any calls to Parse XML data, and I don't recommend changing it after +it has been set. + + +

Handles

+ +Where browsing an XML document in a robust way, it is important to check +for null returns from method calls. An error safe implementation can +generate a lot of code like: + +@verbatim +TiXmlElement* root = document.FirstChildElement( "Document" ); +if ( root ) +{ + TiXmlElement* element = root->FirstChildElement( "Element" ); + if ( element ) + { + TiXmlElement* child = element->FirstChildElement( "Child" ); + if ( child ) + { + TiXmlElement* child2 = child->NextSiblingElement( "Child" ); + if ( child2 ) + { + // Finally do something useful. +@endverbatim + +Handles have been introduced to clean this up. Using the TiXmlHandle class, +the previous code reduces to: + +@verbatim +TiXmlHandle docHandle( &document ); +TiXmlElement* child2 = docHandle.FirstChild( "Document" ).FirstChild( "Element" ).Child( "Child", 1 ).ToElement(); +if ( child2 ) +{ + // do something useful +@endverbatim + +Which is much easier to deal with. See TiXmlHandle for more information. + + +

Row and Column tracking

+Being able to track nodes and attributes back to their origin location +in source files can be very important for some applications. Additionally, +knowing where parsing errors occured in the original source can be very +time saving. + +TinyXML can tracks the row and column origin of all nodes and attributes +in a text file. The TiXmlBase::Row() and TiXmlBase::Column() methods return +the origin of the node in the source text. The correct tabs can be +configured in TiXmlDocument::SetTabSize(). + + +

Using and Installing

+ +To Compile and Run xmltest: + +A Linux Makefile and a Windows Visual C++ .dsw file is provided. +Simply compile and run. It will write the file demotest.xml to your +disk and generate output on the screen. It also tests walking the +DOM by printing out the number of nodes found using different +techniques. + +The Linux makefile is very generic and runs on many systems - it +is currently tested on mingw and +MacOSX. You do not need to run 'make depend'. The dependecies have been +hard coded. + +

Windows project file for VC6

+ + +

Makefile

+At the top of the makefile you can set: + +PROFILE, DEBUG, and TINYXML_USE_STL. Details (such that they are) are in +the makefile. + +In the tinyxml directory, type "make clean" then "make". The executable +file 'xmltest' will be created. + + + +

To Use in an Application:

+ +Add tinyxml.cpp, tinyxml.h, tinyxmlerror.cpp, tinyxmlparser.cpp, tinystr.cpp, and tinystr.h to your +project or make file. That's it! It should compile on any reasonably +compliant C++ system. You do not need to enable exceptions or +RTTI for TinyXML. + + +

How TinyXML works.

+ +An example is probably the best way to go. Take: +@verbatim + + + + Go to the Toy store! + Do bills + +@endverbatim + +Its not much of a To Do list, but it will do. To read this file +(say "demo.xml") you would create a document, and parse it in: +@verbatim + TiXmlDocument doc( "demo.xml" ); + doc.LoadFile(); +@endverbatim + +And its ready to go. Now lets look at some lines and how they +relate to the DOM. + +@verbatim + +@endverbatim + + The first line is a declaration, and gets turned into the + TiXmlDeclaration class. It will be the first child of the + document node. + + This is the only directive/special tag parsed by by TinyXML. + Generally directive tags are stored in TiXmlUnknown so the + commands wont be lost when it is saved back to disk. + +@verbatim + +@endverbatim + + A comment. Will become a TiXmlComment object. + +@verbatim + +@endverbatim + + The "ToDo" tag defines a TiXmlElement object. This one does not have + any attributes, but does contain 2 other elements. + +@verbatim + +@endverbatim + + Creates another TiXmlElement which is a child of the "ToDo" element. + This element has 1 attribute, with the name "priority" and the value + "1". + +@verbatim +Go to the +@endverbatim + + A TiXmlText. This is a leaf node and cannot contain other nodes. + It is a child of the "Item" TiXmlElement. + +@verbatim + +@endverbatim + + + Another TiXmlElement, this one a child of the "Item" element. + +Etc. + +Looking at the entire object tree, you end up with: +@verbatim +TiXmlDocument "demo.xml" + TiXmlDeclaration "version='1.0'" "standalone=no" + TiXmlComment " Our to do list data" + TiXmlElement "ToDo" + TiXmlElement "Item" Attribtutes: priority = 1 + TiXmlText "Go to the " + TiXmlElement "bold" + TiXmlText "Toy store!" + TiXmlElement "Item" Attributes: priority=2 + TiXmlText "Do bills" +@endverbatim + +

Documentation

+ +The documentation is build with Doxygen, using the 'dox' +configuration file. + +

License

+ +TinyXML is released under the zlib license: + +This software is provided 'as-is', without any express or implied +warranty. In no event will the authors be held liable for any +damages arising from the use of this software. + +Permission is granted to anyone to use this software for any +purpose, including commercial applications, and to alter it and +redistribute it freely, subject to the following restrictions: + +1. The origin of this software must not be misrepresented; you must +not claim that you wrote the original software. If you use this +software in a product, an acknowledgment in the product documentation +would be appreciated but is not required. + +2. Altered source versions must be plainly marked as such, and +must not be misrepresented as being the original software. + +3. This notice may not be removed or altered from any source +distribution. + +

References

+ +The World Wide Web Consortium is the definitive standard body for +XML, and there web pages contain huge amounts of information. + +The definitive spec: +http://www.w3.org/TR/2004/REC-xml-20040204/ + +I also recommend "XML Pocket Reference" by Robert Eckstein and published by +OReilly...the book that got the whole thing started. + +

Contributors, Contacts, and a Brief History

+ +Thanks very much to everyone who sends suggestions, bugs, ideas, and +encouragement. It all helps, and makes this project fun. A special thanks +to the contributors on the web pages that keep it lively. + +So many people have sent in bugs and ideas, that rather than list here +we try to give credit due in the "changes.txt" file. + +TinyXML was originally written by Lee Thomason. (Often the "I" still +in the documentation.) Lee reviews changes and releases new versions, +with the help of Yves Berquin, Andrew Ellerton, and the tinyXml community. + +We appreciate your suggestions, and would love to know if you +use TinyXML. Hopefully you will enjoy it and find it useful. +Please post questions, comments, file bugs, or contact us at: + +www.sourceforge.net/projects/tinyxml + +Lee Thomason, Yves Berquin, Andrew Ellerton +*/ -- cgit