This file describes the modifications that have been made to this version of CUDD.
It is based on CUDD 2.4.0. Original files can be found in the "orig" directory.
Below is a list of the files that have been changed.

 * Makefile.*
 * setup.sh .
 * shutdown.sh .
 * cudd/cuddAddAbs.c
 * cudd/cuddAddApply.c
 * cudd/cuddAddNeg.c
 * cudd/cuddExport.c
 * cudd/cuddSat.c
 * cudd/cuddTable.c
 * cudd/cudd.h
 * cudd/cuddInt.h
 * util/Makefile
 * util/cpu_time.c
 * util/pipefork.c

The following structural changes have also been made:

 * ddmp/nanotrav/mnemosyne/obj/sis and various doc directories have been removed
 * lib directory added with symlinks to lib files


Details
-------

[Makefile.*]

* Tailored for different OSs: Linux (32/64), Solaris, Cygwin/MinGW, OS X/Darwin

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

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[setup.sh]

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

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[shutdown.sh]

* Delete lib directory too

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[cudd/cuddAddAbs.c]

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

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[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
  Cudd_addLogXY() - log x base y
  
* Added the following functions to be used with Cudd_addMonadicApply()
  Cudd_addFloor() - floor
  Cudd_addCeil() - ceiling
  
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[cudd/cuddAddNeg.c]

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

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[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

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[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

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[cudd/cuddTable.c]

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

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[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_addLogXY()
  Cudd_addFloor()
  Cudd_addCeil()
  Cudd_EqualSupNormRel()
  cuddAddMinAbstractRecur()
  cuddAddMaxAbstractRecur()

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[util/Makefile]

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

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[util/cpu_time.c]

* Extended util_cpu_time() function to work under MingW.

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[util/pipefork.c]

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