/**
* Returns the BDD corresponding to state e according to the projection of set.
* Order: [0]<[1]<[n] and hi < lo
*/
static BDD
state_to_bdd(const int* e, size_t vec_length, BDDVAR* vec_to_bddvar, BDD projection)
{
LACE_ME;
check_state(e, vec_length);
size_t varcount = vec_length * fddbits;
char* cube = (char*)alloca(varcount*sizeof(char));
memset(cube, 0, varcount*sizeof(char));
size_t i;
int j;
for (i=0;i<vec_length;i++) {
for (j=0;j<fddbits;j++) {
if (e[i] & (1<<(fddbits-j-1))) cube[i*fddbits+j] = 1;
}
}
// check if in right order
for (i=0;i<varcount-1;i++) assert(vec_to_bddvar[i]<vec_to_bddvar[i+1]);
BDDSET meta = sylvan_set_fromarray(vec_to_bddvar, varcount);
BDD bdd = sylvan_ref(sylvan_cube(meta, cube));
BDD proj = sylvan_ref(sylvan_exists(bdd, projection));
sylvan_deref(bdd);
return proj;
}
/**
* Calculate projection of src onto dst
*/
static void
set_project(vset_t dst,vset_t src)
{
LACE_ME;
sylvan_deref(dst->bdd);
if (dst->projection != 0) dst->bdd = sylvan_exists(src->bdd, dst->projection);
else dst->bdd = src->bdd;
sylvan_ref(dst->bdd);
}
JNIEXPORT jlong JNICALL
Java_jsylvan_JSylvan_makeExists(JNIEnv *env, jclass cl, jlong a, jlong b)
{
LACE_ME;
return sylvan_exists(a, b);
}