+Boolean *CSolver::applyLogicalOperation(LogicOp op, Boolean * arg1, Boolean * arg2) {
+ Boolean * array[] = {arg1, arg2};
+ return applyLogicalOperation(op, array, 2);
+}
+
+Boolean *CSolver::applyLogicalOperation(LogicOp op, Boolean *arg) {
+ Boolean * array[] = {arg};
+ return applyLogicalOperation(op, array, 1);
+}
+
+
+Boolean *CSolver::applyLogicalOperation(LogicOp op, Boolean **array, uint asize) {
+ Boolean * newarray[asize];
+ switch(op) {
+ case SATC_NOT: {
+ if (array[0]->type == LOGICOP && ((BooleanLogic *)array[0])->op==SATC_NOT) {
+ return ((BooleanLogic *) array[0])->inputs.get(0);
+ } else if (array[0]->type == BOOLCONST) {
+ return array[0]->isTrue() ? boolFalse : boolTrue;
+ }
+ break;
+ }
+ case SATC_IFF: {
+ for(uint i=0;i<2;i++) {
+ if (array[i]->type == BOOLCONST) {
+ if (array[i]->isTrue()) {
+ return array[1-i];
+ } else {
+ newarray[0]=array[1-i];
+ return applyLogicalOperation(SATC_NOT, newarray, 1);
+ }
+ }
+ }
+ break;
+ }
+ case SATC_XOR: {
+ for(uint i=0;i<2;i++) {
+ if (array[i]->type == BOOLCONST) {
+ if (array[i]->isTrue()) {
+ newarray[0]=array[1-i];
+ return applyLogicalOperation(SATC_NOT, newarray, 1);
+ } else
+ return array[1-i];
+ }
+ }
+ break;
+ }
+ case SATC_OR: {
+ uint newindex=0;
+ for(uint i=0;i<asize;i++) {
+ Boolean *b=array[i];
+ if (b->type == BOOLCONST) {
+ if (b->isTrue())
+ return b;
+ else
+ continue;
+ } else
+ newarray[newindex++]=b;
+ }
+ if (newindex==1)
+ return newarray[0];
+ else if (newindex == 2) {
+ bool isNot0 = (newarray[0]->type==BOOLCONST) && ((BooleanLogic *)newarray[0])->op == SATC_NOT;
+ bool isNot1 = (newarray[1]->type==BOOLCONST) && ((BooleanLogic *)newarray[1])->op == SATC_NOT;
+
+ if (isNot0 != isNot1) {
+ if (isNot0) {
+ newarray[0] = ((BooleanLogic *) newarray[0])->inputs.get(0);
+ } else {
+ Boolean *tmp = ((BooleanLogic *) array[1])->inputs.get(0);
+ array[1] = array[0];
+ array[0] = tmp;
+ }
+ return applyLogicalOperation(SATC_IMPLIES, newarray, 2);
+ }
+ } else {
+ array = newarray;
+ asize = newindex;
+ }
+ break;
+ }
+ case SATC_AND: {
+ uint newindex=0;
+ for(uint i=0;i<asize;i++) {
+ Boolean *b=array[i];
+ if (b->type == BOOLCONST) {
+ if (b->isTrue())
+ continue;
+ else
+ return b;
+ } else
+ newarray[newindex++]=b;
+ }
+ if(newindex==1) {
+ return newarray[0];
+ } else {
+ array = newarray;
+ asize = newindex;
+ }
+ break;
+ }
+ case SATC_IMPLIES: {
+ if (array[0]->type == BOOLCONST) {
+ if (array[0]->isTrue()) {
+ return array[1];
+ } else {
+ return boolTrue;
+ }
+ } else if (array[1]->type == BOOLCONST) {
+ if (array[1]->isTrue()) {
+ return array[1];
+ } else {
+ return applyLogicalOperation(SATC_NOT, array, 1);
+ }
+ }
+ break;
+ }
+ }
+
+ Boolean *boolean = new BooleanLogic(this, op, array, asize);
+ Boolean *b = boolMap.get(boolean);
+ if (b == NULL) {
+ boolMap.put(boolean, boolean);
+ allBooleans.push(boolean);
+ return boolean;
+ } else {
+ delete boolean;
+ return b;
+ }