Lustre Interpreter
-------------------------------------------------
Copyright (c) 2013-14, Gregory Gay (greg@greggay.com). 

Antlr4-based interpreter for the Lustre synchronous language.  

This Source Code is subject to the terms of the Mozilla Public License, v. 2.0. 
If a copy of the MPL was not distributed with this file, You can obtain one at 
http://mozilla.org/MPL/2.0/.

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.
-------------------------------------------------

Version 1.0

NOTES
- This is research code, and comes with the usual caveats. The code is a 
work in progress, and I would love to clean it up when I have more time, 
but for now - it does what it needs to do for my purposes. Feel free to 
use it, upgrade it, improve it - let me know if you do! - but if it breaks, 
don't be too surprised. Enjoy!
- This interpreter supports a limited subset of the Lustre language, namely:
	- Currently, the interpreter only supports single-node Lustre models.
	- Subsets are not supported
- OMC/DC refers to the Observable MC/DC source code coverage metric for software 
testing. Given a set of inputs and the use of the omcdc command line flag, the 
interpreter will track which OMC/DC obligations are satisfied and produce a 
report. For more information, see: http://www.greggay.com/pdf/13omcdc.pdf

-----------------------------
To compile:

make compile

To clean up when done:

make clean

To execute: (following compile)

java LustreSimulator.java <model filename> <inputs filename> <operation mode> <optional arguments>

Optional arguments are:
oracle=filename
(variable file - required for OMC/DC tracking, specifies the oracle variables)
order=filename
(variable file - optional for simulate mode, specifies an ordering and which variables are in the trace)
resume=filename
(trace file - resume from an existing trace, same format as input file)

----------------------------
Input file should be in format
varname1,varname2,...
value11,value21,...
...
value1n, value2n,...
----------------------------
Variable file shouls be in format
varname1,varname2,...

---------------------------
Operation modes are:
simulate (standard Lustre simulation)
order (reorders expressions so that all variables are defined before use)
omcdc (tracks satisfaction of Observable MC/DC test obligations)