/**
* This is the internal execution of set_enum
* <levels> contains k BDDLEVEL levels.
* 0 <= n < k
*/
static void
set_enum_do(BDD root, const BDD variables, int *vec, int n, vset_element_cb cb, void* context)
{
if (root == sylvan_false) return;
if (sylvan_set_isempty(variables)) {
// Make sure that there are no variables left
assert(root == sylvan_true);
// We have one satisfying assignment!
cb(context, vec);
} else {
BDDVAR var = sylvan_var(variables);
BDD variables_next = sylvan_set_next(variables);
int i = n / fddbits; // which slot in the state vector
int j = n % fddbits; // which bit?
uint32_t bitmask = 1 << (fddbits-1-j);
if (root == sylvan_true || var != sylvan_var(root)) {
// n is skipped, take both
vec[i] |= bitmask;
set_enum_do(root, variables_next, vec, n+1, cb, context);
vec[i] &= ~bitmask;
set_enum_do(root, variables_next, vec, n+1, cb, context);
} else {
vec[i] |= bitmask;
set_enum_do((sylvan_high(root)), variables_next, vec, n+1, cb, context);
vec[i] &= ~bitmask;
set_enum_do((sylvan_low(root)), variables_next, vec, n+1, cb, context);
}
}
}
JNIEXPORT jint JNICALL
Java_jsylvan_JSylvan_getVar(JNIEnv *env, jclass cl, jlong bdd)
{
return sylvan_var(bdd);
}
JNIEXPORT jlong JNICALL
Java_jsylvan_JSylvan_getIf(JNIEnv *env, jclass cl, jlong bdd)
{
return sylvan_ithvar(sylvan_var(bdd));
}
