CUDD
====

This is a modified version of CUDD 2.4.0.
This directory contains copies of all modified files.
The modifications are detailed below.
The original files are in the directory orig.
It also contains copies of Makefiles/scripts used to build CUDD successfully on several OSs.
The following structural changes have also been made:
 * ddmp/nanotrav/mnemosyne/obj/sis directories have been removed
 * lib directory added with symlinks to lib files

Commands to update
------------------

cd $CUDDDIR
/bin/cp modified/Makefile.* .
/bin/cp Makefile.linux Makefile
/bin/cp modified/setup.sh .
/bin/cp modified/cudd/cuddAddAbs.c cudd
/bin/cp modified/cudd/cuddAddApply.c cudd
/bin/cp modified/cudd/cuddAddNeg.c cudd
/bin/cp modified/cudd/cuddExport.c cudd
/bin/cp modified/cudd/cuddSat.c cudd
/bin/cp modified/cudd/cuddTable.c cudd
/bin/cp modified/cudd/cudd.h cudd
/bin/cp modified/cudd/cuddInt.h cudd
/bin/cp modified/util/Makefile util
/bin/cp modified/util/cpu_time.c util
/bin/cp modified/util/pipefork.c util

Details
-------

[Makefile.*]

* Tailored for different OSs: linux, solaris, cygwin/mingwin, darwin

* Disabled building of dddmp/nanotrav/mnemosyne packages (don't need)

------------------

[setup.sh]

* Don't create links for includes we don't use
* Create links for libs too

------------------

[shutdown.sh]

* Delete lib directory too

------------------

[cudd/cuddAddAbs.c]

* Added 2 more abstraction functions to do min/max, ie:
  Cudd_addMinAbstract()
  Cudd_addMaxAbstract()
  cuddAddMinAbstractRecur()
  cuddAddMaxAbstractRecur()

------------------

[cudd/cuddAddApply.c]

* Added the following functions to be used with Cudd_addApply()
  Cudd_addEquals() - f op g = 1 if f==g else 0
  Cudd_addNotEquals() - f op g = 1 if f!=g else 0
  Cudd_addGreaterThan() - f op g = 1 if f>g else 0
  Cudd_addGreaterThanEquals() - f op g = 1 if f>=g else 0
  Cudd_addLessThan() - f op g = 1 if f<g else 0
  Cudd_addLessThanEquals() - f op g = 1 if f<=g else 0
  Cudd_addPow() - power
  Cudd_addMod() - modulo
  
* Added the following functions to be used with Cudd_addMonadicApply()
  Cudd_addFloor() - floor
  Cudd_addCeil() - ceiling
  
------------------

[cudd/cuddAddNeg.c]

* Changed Cudd_addRoundOff (actually cuddAddRoundOffRecur) so that it rounds
  properly to N decimal places rather than always rounding up.

------------------

[cudd/cuddExport.c]

* Changed Cudd_DumpDot:
  - dashed lines for else arcs changed to dotted (more readable on big graphs)
  - the constant node 0 and all arcs to it are not printed
  - labels on nodes omitted

------------------

[cudd/cuddSat.c]

* Added the function Cudd_EqualSupNormRel()
  It's very similar to Cudd_EqualSupNorm() but checks for relative difference
  i.e. (f-g/f) < e instead of (f-g) < e

------------------

[cudd/cuddTable.c]

* Changed cuddUniqueConst so that constants differing by very small amounts
  end up in the same hash table

------------------

[cudd/{cudd.h,cuddInt.h}]

* Added prototypes for:
  Cudd_addMinAbstract()
  Cudd_addMaxAbstract()
  Cudd_addEquals()
  Cudd_addNotEquals()
  Cudd_addGreaterThan()
  Cudd_addGreaterThanEquals()
  Cudd_addLessThan()
  Cudd_addLessThanEquals()
  Cudd_addPow()
  Cudd_addMod()
  Cudd_addFloor()
  Cudd_addCeil()
  Cudd_EqualSupNormRel()
  cuddAddMinAbstractRecur()
  cuddAddMaxAbstractRecur()

------------------

[util/Makefile]

* Disabled -DUNIX flag so that MingW version compiles OK.
  Don't think we need anything that this adds in.

------------------

[util/cpu_time.c]

* Extended util_cpu_time() function to work under MingW.

------------------

[util/pipefork.c]

* Added #ifdef around #include of <sys/wait.h> so that MingW version
  can specify that it doesn't have it.