* src/bddop.c: Empty macro arguments are undefined ISO C90 and
ISO C++98. Use '+' when calling APPLY_SHORTCUTS.
* src/fdd.c, src/kernel.c: Avoid constructs invalid in C90.
* src/bddop.c, src/bddx.h, src/kernel.c, src/kernel.h,
examples/cmilner/cmilner.c: Remove C++ comments.
The double result is never used with a triple keys,
so we can pack the cache entry more tightly.
* src/cache.h: Reorganize the cache entry the structure.
* src/cache.c: Cleanup the code while we are at it.
* src/bddop.c: Adjust to accesses to cache entries.
This can only cause failure when running under valgrind (i.e., in the
test suite), but is not a problem in practice as the test is certain
to fail the entry->c check whenever entry->b is uninitialized.
* src/bddop.c (bdd_implies): Here.
BddCache_lookup return an entry from a Not operation.
* src/bddop.c (apply_rec, simplify_rec): When checking the cache
entry, always check entry->a and entry->c before checking
entry->b, because the "not_rec()" function does not initialize
the latter.
bdd_uniquecomp, bdd_appexcomp, bdd_appallcomp,
bdd_appunicomp): Declare for C and C++.
* src/bddop.c (CACHEID_EXISTC, CACHEID_FORALLC,
CACHEID_UNIQUEC, CACHEID_APPEXC, CACHEID_APPALC,
CACHEID_APPUNCC): New macros.
(quatvarsetcomp): New variables.
(varset2vartable): Take a second argument to indicate negation,
set quatvarsetcomp.
(INVARSET): Honor quatvarsetcomp.
(quantify): New function, extracted from bdd_exist, bdd_forall,
and bdd_appunicomp.
(bdd_exist, bdd_forall, bdd_appunicomp): Use quantify.
(bdd_existcomp, bdd_forallcomp, bdd_appunicompcomp): New functions.
(appquantify): New function, extracted from bdd_appex, bdd_appall,
and bdd_appuni.
(bdd_appex, bdd_appall, bdd_appuni): Use appquantify.
(bdd_appexcomp, bdd_appallcomp, bdd_appunicomp): New functions.
* src/bddop.c (bdd_support): Return bddtrue when the support
is empty, because variable sets are conjunctions.
