/**
* This is the main routine of "MonoCrosser", and implements a monotonic strategy on multiple curves.
* Finds crossings between two sets of paths, yielding a CrossingSet. [0, a.size()) of the return correspond
* to the sorted crossings of a with paths of b. The rest of the return, [a.size(), a.size() + b.size()],
* corresponds to the sorted crossings of b with paths of a.
*
* This function does two sweeps, one on the bounds of each path, and after that cull, one on the curves within.
* This leads to a certain amount of code complexity, however, most of that is factored into the above functions
*/
CrossingSet MonoCrosser::crossings(std::vector<Path> const &a, std::vector<Path> const &b) {
if(b.empty()) return CrossingSet(a.size(), Crossings());
CrossingSet results(a.size() + b.size(), Crossings());
if(a.empty()) return results;
std::vector<std::vector<double> > splits_a = paths_mono_splits(a), splits_b = paths_mono_splits(b);
std::vector<std::vector<Rect> > bounds_a = split_bounds(a, splits_a), bounds_b = split_bounds(b, splits_b);
std::vector<Rect> bounds_a_union, bounds_b_union;
for(unsigned i = 0; i < bounds_a.size(); i++) bounds_a_union.push_back(union_list(bounds_a[i]));
for(unsigned i = 0; i < bounds_b.size(); i++) bounds_b_union.push_back(union_list(bounds_b[i]));
std::vector<std::vector<unsigned> > cull = sweep_bounds(bounds_a_union, bounds_b_union);
Crossings n;
for(unsigned i = 0; i < cull.size(); i++) {
for(unsigned jx = 0; jx < cull[i].size(); jx++) {
unsigned j = cull[i][jx];
unsigned jc = j + a.size();
Crossings res;
//Sweep of the monotonic portions
std::vector<std::vector<unsigned> > cull2 = sweep_bounds(bounds_a[i], bounds_b[j]);
for(unsigned k = 0; k < cull2.size(); k++) {
for(unsigned lx = 0; lx < cull2[k].size(); lx++) {
unsigned l = cull2[k][lx];
mono_pair(a[i], splits_a[i][k-1], splits_a[i][k],
b[j], splits_b[j][l-1], splits_b[j][l],
res, .1);
}
}
for(unsigned k = 0; k < res.size(); k++) { res[k].a = i; res[k].b = jc; }
merge_crossings(results[i], res, i);
merge_crossings(results[i], res, jc);
}
}
return results;
}
bool my_walker(Node *node, context_walker_set_constraint *context){
if (node == NULL)
return false;
/* elog(LOG,"tag : %d\n",nodeTag(node)); */
if(IsA(node,BoolExpr)){
BoolExpr * bExpr =(BoolExpr *) node;
bool retour = false;
List * l_true_save = NULL;
List * l_false_save = NULL;
List * l_true = NULL;
List * l_false = NULL;
int nb_arg = bExpr->args->length;
switch(bExpr->boolop){
case NOT_EXPR:
/*(Unicité des valeur) Setisation sur le true*/
/*Pre Traitement*/
l_true_save = context->list_of_not_null_to_be_true;
l_false_save = context->list_of_not_null_to_be_false;
context->list_of_not_null_to_be_true = NULL;
context->list_of_not_null_to_be_false = NULL;
/*Traitement*/
retour = expression_tree_walker(node, my_walker, (void *) context);
/*Post Traitement*/
/* elog(LOG,"\n List_false_before : %s\n",nodeToString(context->list_of_not_null_to_be_false)); */
/* elog(LOG,"\n List_true_before : %s\n",nodeToString(context->list_of_not_null_to_be_true)); */
l_true = context->list_of_not_null_to_be_true;
l_false = context->list_of_not_null_to_be_false;
context->list_of_not_null_to_be_true = list_concat(l_true_save,l_false);
context->list_of_not_null_to_be_false = list_concat(l_false_save,l_true);
/* elog(LOG,"\n List_false : %s\n",nodeToString(context->list_of_not_null_to_be_false)); */
/* elog(LOG,"\n List_true : %s\n",nodeToString(context->list_of_not_null_to_be_true)); */
return retour;
break;
case AND_EXPR:
/*(Unicité des valeur) Setisation sur le true*/
/*Pre Traitement*/
l_true_save = context->list_of_not_null_to_be_true;
l_false_save = context->list_of_not_null_to_be_false;
context->list_of_not_null_to_be_true = NULL;
context->list_of_not_null_to_be_false = NULL;
/*Traitement*/
retour = expression_tree_walker(node, my_walker, (void *) context);
/*Post traitement*/
/* elog(LOG,"\n List_false_before : %s\n",nodeToString(context->list_of_not_null_to_be_false)); */
/* elog(LOG,"\n List_true_before : %s\n",nodeToString(context->list_of_not_null_to_be_true)); */
l_true = union_list(context->list_of_not_null_to_be_true);
l_false = inter_list(context->list_of_not_null_to_be_false,nb_arg);
context->list_list_true = lappend(context->list_list_true,l_true);
context->list_list_false = lappend(context->list_list_false,l_false);
context->list_of_not_null_to_be_true = list_concat(l_true_save,l_true);
context->list_of_not_null_to_be_false = list_concat(l_false_save,l_false);
/* elog(LOG,"\n nb_arg : %d\n",nb_arg); */
/* elog(LOG,"\n List_false : %s\n",nodeToString(context->list_of_not_null_to_be_false)); */
/* elog(LOG,"\n List_true : %s\n",nodeToString(context->list_of_not_null_to_be_true)); */
return retour;
break;
case OR_EXPR:
/*(Unicité des valeur) Setisation sur le true*/
/*Pre Traitement*/
l_true_save = context->list_of_not_null_to_be_true;
l_false_save = context->list_of_not_null_to_be_false;
context->list_of_not_null_to_be_true = NULL;
context->list_of_not_null_to_be_false = NULL;
/*Traitement*/
retour = expression_tree_walker(node, my_walker, (void *) context);
/*Post traitement*/
/* elog(LOG,"\n List_false_before : %s\n",nodeToString(context->list_of_not_null_to_be_false)); */
/* elog(LOG,"\n List_true_before : %s\n",nodeToString(context->list_of_not_null_to_be_true)); */
l_true = inter_list(context->list_of_not_null_to_be_true,nb_arg);
l_false = union_list(context->list_of_not_null_to_be_false);
context->list_list_true = lappend(context->list_list_true,l_true);
context->list_list_false = lappend(context->list_list_false,l_false);
context->list_of_not_null_to_be_true = list_concat(l_true_save,l_true);
context->list_of_not_null_to_be_false = list_concat(l_false_save,l_false);
/* elog(LOG,"\n nb_arg : %d\n",nb_arg); */
/* elog(LOG,"\n List_false : %s\n",nodeToString(context->list_of_not_null_to_be_false)); */
/* elog(LOG,"\n List_true : %s\n",nodeToString(context->list_of_not_null_to_be_true)); */
return retour;
break;
}
}
if(context->ready && IsA(node,Var)){
/* elog(LOG," \n HERE1 \n"); */
Var * v = getTrueVar(context->current_trueVar,(Var *)node);
/* elog(LOG," \n HERE2 \n"); */
if(!isInListTrueVar(context->list_of_not_null_in_op,v)){
context->list_of_not_null_in_op = lappend(context->list_of_not_null_in_op,v);
}
return expression_tree_walker(node, my_walker, (void *) context);
}
if(IsA(node,OpExpr)){
OpExpr * oExpr = (OpExpr *)node;
if(oExpr->opno == 518 /*<>*/){
context->ready = true;
context->list_of_not_null_in_op = NULL;
bool retour = expression_tree_walker(node, my_walker, (void *) context);
context->list_of_not_null_to_be_true = list_concat(context->list_of_not_null_to_be_true,context->list_of_not_null_in_op);
return retour;
}
else{
return expression_tree_walker(node, my_walker, (void *) context);
}
/* elog(LOG,"\n List_op : %s\n",nodeToString(context->list_of_not_null_in_op)); */
}
if(IsA(node,Query)){
Query * q = (Query *) node;
/*Prétraitement*/
List * save_current_trueVar = context->current_trueVar;
context->current_trueVar = NULL;
context->current_trueVar = lappend(context->current_trueVar,save_current_trueVar);
/*Traitement*/
/*Create trueVars and not_null schema*/
bool result = expression_tree_walker((Node *)q->rtable, my_walker, (void *) context);
/* elog(LOG,"\n TRUE ATT :%s\n",nodeToString(context->trueVars)); */
context->trueVars = lappend(context->trueVars,context->current_trueVar);
/* elog(LOG,"\nTRUE ATT :%s \n",nodeToString(context->trueVars)); */
/*Propagate*/
result = expression_tree_walker((Node *)q->jointree, my_walker, (void *) context) | result;
/* elog(LOG,"\n LIST_LIST_TRUE :%s\n",nodeToString(context->list_list_true)); */
/* elog(LOG,"\n LIST_LIST_FALSE :%s\n",nodeToString(context->list_list_false)); */
/*Post Traitement*/
context->current_trueVar = save_current_trueVar;
return result;
}
if(IsA(node,RangeTblEntry)){
RangeTblEntry * rte = (RangeTblEntry *)node;
Oid relid= rte->relid;
int number_col = get_relnatts(relid);
AttrNumber i = 0;
List * relation = NULL;
for(i=1;i<=number_col;i++){
/*Create True_var*/
Var * v = makeNode(Var);
v->varattno = i;
/* v->varattno = context->current_varattno; */
v->vartype = relid;
relation = lappend(relation,v);
/*Add to not_null if needed*/
if(get_pg_att_not_null(relid,i)){
context->list_of_not_null_att_schem = lappend(context->list_of_not_null_att_schem,v);
}
}
context->current_trueVar = lappend(context->current_trueVar,relation);
/* elog(LOG,"\n TEST: %s \n",nodeToString(context->current_trueVar)); */
return false;
}
return expression_tree_walker(node, my_walker, (void *) context);
}
