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# uSCXML ReadMe
[](https://travis-ci.org/tklab-tud/uscxml)[](https://ci.appveyor.com/project/sradomski/uscxml/branch/master)[](https://scan.coverity.com/projects/tklab-tud-uscxml)[](https://coveralls.io/github/tklab-tud/uscxml?branch=master)
#### Quick Links
- [Building from source](http://tklab-tud.github.io/uscxml/building.html)
- [Tests passed](test/w3c/TESTS.md)
- [Publications](docs/PUBLICATIONS.md)
## What is it?
uSCXML is a platform to work with state-charts given as
[SCXML](http://www.w3.org/TR/scxml/) files. It consists of three principal components:
1. `libuscxml`: [C++ library](#embedded-as-a-library) containing an interpreter and accompanying functionality.
2. `uscxml-browser`: A standards compliant [command-line interpreter](#on-the-command-line) of SCXML documents.
3. `uscxml-transform`: A collection of [transformation](#for-transformations) implementations to transpile SCXML, e.g. onto ANSI-C and VHDL.
The status of the various datamodels, bindings and generators with regard to the [W3C IRP
tests](https://www.w3.org/Voice/2013/scxml-irp/) can be checked in the [test
table](test/w3c/TESTS.md).
## Installation
There are no installers yet and we do not feature any releases. Just check for [open issues](https://github.com/tklab-tud/uscxml/issues) and [build from source](http://tklab-tud.github.io/uscxml/building.html). If you did download and build locally, you can create installers via `make packages` though.
## Documentation
Documentation is available at our [github pages](http://tklab-tud.github.io/uscxml/). It is created from inline comments in the source along with some dedicated markdown pages via `doxygen`. We try to keep it current and will update it ever again. For the most current documentation, you can run `make docs` in your build directory.
## Licensing
uSCXML itself is distributed under the [Simplified BSD license](http://www.opensource.org/licenses/bsd-license) as in, do not sue
us and do not misrepresent authorship. There are currently four additional libraries that are required to compile uSCXML.
| Project | License | Comment |
|---------|---------|---------|
| [libcurl](https://curl.haxx.se/libcurl/) | [MIT/X derivate](https://curl.haxx.se/docs/copyright.html) | Used in uSCXML to fetch remote content |
| [Xerces-C++](https://xerces.apache.org/xerces-c/) | [Apache v2](http://www.apache.org/licenses/LICENSE-2.0.html) | XML parser and DOM implementation |
| [libevent](http://libevent.org) | [3-clause BSD](http://libevent.org/LICENSE.txt) | Delayed event queues |
| [uriparser](http://uriparser.sourceforge.net) | [New BSD](https://sourceforge.net/p/uriparser/git/ci/master/tree/COPYING) | Referring and resolving URIs |
At configure time, the uSCXML build-process will attempt to find and link several other libraries (e.g. Lua, v8) and additional licensing terms may apply.
## Getting Started
For more detailled information, refer to the [documentation](http://tklab-tud.github.io/uscxml).
### Embedded as a Library
uscxml::Interpreter scxml = uscxml::Interpreter::fromURL("...");
while(scxml.step() != uscxml::USCXML_FINISHED) {
...
}
**Examples:**
* [uscxml-browser.cpp](https://github.com/tklab-tud/uscxml/blob/master/apps/uscxml-browser.cpp) (**C++**)
* [test-state-pass.cpp](https://github.com/tklab-tud/uscxml/blob/master/test/src/test-state-pass.cpp) (**C++**)
* [TestStatePass.cs](https://github.com/tklab-tud/uscxml/blob/master/contrib/csharp/bindings/TestStatePass.cs) (**C#**)
* [test-state-pass.py](https://github.com/tklab-tud/uscxml/blob/master/contrib/python/bindings/test-state-pass.py) (**Python**)
* [JexlDataModelTest.java](https://github.com/tklab-tud/uscxml/blob/master/contrib/java/bindings/org/uscxml/tests/JexlDataModelTest.java) (**Java**)
### On the Command-line
# interpret state-chart from url
$ uscxml-browser https://raw.githubusercontent.com/tklab-tud/uscxml/master/test/w3c/null/test436.scxml
### For Transformations
# transform given SCXML document into ANSI-C fragment
$ uscxml-transform -tc -i https://raw.githubusercontent.com/tklab-tud/uscxml/master/test/w3c/null/test436.scxml
**Examples:**
* [test-gen-c.cpp](https://github.com/tklab-tud/uscxml/blob/master/test/src/test-gen-c.cpp) (**C++**)
* [WaterPump.cxx](https://github.com/tklab-tud/uscxml/blob/master/apps/arduino/WaterPump.cxx) (**C++ on Arduino**)
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