7 #define EDGE_IS_VAR_CONSTANT 2
9 #define EDGE_MASK (NEGATE_EDGE | EDGE_IS_VAR_CONSTANT)
12 typedef struct Edge Edge;
15 typedef struct Node Node;
29 typedef enum NodeType NodeType;
36 typedef struct NodeFlags NodeFlags;
47 #define DEFAULT_CNF_ARRAY_SIZE 256
48 #define LOAD_FACTOR 0.25
49 #define enableMatching 1
58 VectorEdge constraints;
61 typedef struct CNF CNF;
63 static inline bool getExpanded(Node *n, int isNegated) {
64 return n->flags.wasExpanded & (1<<isNegated);
67 static inline void setExpanded(Node *n, int isNegated) {
68 n->flags.wasExpanded |= (1<<isNegated);
71 static inline Edge constraintNegate(Edge e) {
72 Edge enew = { (Node *) (((uintptr_t) e.node_ptr) ^ NEGATE_EDGE)};
76 static inline bool sameNodeVarEdge(Edge e1, Edge e2) {
77 return ! (((uintptr_t) e1.node_ptr ^ (uintptr_t) e2.node_ptr) & (~ (uintptr_t) NEGATE_EDGE));
80 static inline bool sameSignEdge(Edge e1, Edge e2) {
81 return !(((uintptr_t) e1.node_ptr ^ (uintptr_t) e2.node_ptr) & NEGATE_EDGE);
84 static inline bool sameNodeOppSign(Edge e1, Edge e2) {
85 return (((uintptr_t) e1.node_ptr) ^ ((uintptr_t)e2.node_ptr)) == NEGATE_EDGE;
88 static inline bool isNegEdge(Edge e) {
89 return ((uintptr_t)e.node_ptr) & NEGATE_EDGE;
92 static inline bool isNodeEdge(Edge e) {
93 return !(((uintptr_t)e.node_ptr) & EDGE_IS_VAR_CONSTANT);
96 static inline bool isNegNodeEdge(Edge e) {
97 return (((uintptr_t) e.node_ptr) & (NEGATE_EDGE | EDGE_IS_VAR_CONSTANT)) == NEGATE_EDGE;
100 static inline Node * getNodePtrFromEdge(Edge e) {
101 return (Node *) (((uintptr_t) e.node_ptr) & ~((uintptr_t) EDGE_MASK));
104 static inline NodeType getNodeType(Edge e) {
105 Node * n=getNodePtrFromEdge(e);
106 return n->flags.type;
109 static inline bool equalsEdge(Edge e1, Edge e2) {
110 return e1.node_ptr == e2.node_ptr;
113 static inline bool ltEdge(Edge e1, Edge e2) {
114 return (uintptr_t) e1.node_ptr < (uintptr_t) e2.node_ptr;
117 static inline uint getNodeSize(Edge e) {
118 Node * n=getNodePtrFromEdge(e);
122 static inline Edge * getEdgeArray(Edge e) {
123 Node * n=getNodePtrFromEdge(e);
127 static inline Edge getNonNeg(Edge e) {
128 Edge enew={(Node *)(((uintptr_t)e.node_ptr)&(~((uintptr_t)NEGATE_EDGE)))};
132 static inline bool edgeIsConst(Edge e) {
133 return (((uintptr_t) e.node_ptr) & ~((uintptr_t)NEGATE_EDGE)) == EDGE_IS_VAR_CONSTANT;
136 static inline bool edgeIsVarConst(Edge e) {
137 return ((uintptr_t)e.node_ptr) & EDGE_IS_VAR_CONSTANT;
140 uint hashNode(NodeType type, uint numEdges, Edge * edges);
141 Node * allocNode(NodeType type, uint numEdges, Edge * edges, uint hashCode);
142 bool compareNodes(Node * node, NodeType type, uint numEdges, Edge *edges);
143 Edge create(CNF *cnf, NodeType type, uint numEdges, Edge * edges);
144 Edge constraintOR(CNF * cnf, uint numEdges, Edge *edges);
145 Edge constraintAND(CNF * cnf, uint numEdges, Edge * edges);
146 Edge constraintOR2(CNF * cnf, Edge left, Edge right);
147 Edge constraintAND2(CNF * cnf, Edge left, Edge right);
148 Edge constraintIMPLIES(CNF * cnf, Edge left, Edge right);
149 Edge constraintIFF(CNF * cnf, Edge left, Edge right);
150 Edge constraintITE(CNF * cnf, Edge cond, Edge thenedge, Edge elseedge);
151 Edge constraintNewVar(CNF *cnf);
152 void countPass(CNF *cnf);
153 void countConstraint(CNF *cnf, VectorEdge * stack, Edge e);
156 Edge E_True={(Node *)(uintptr_t) EDGE_IS_VAR_CONSTANT};
157 Edge E_False={(Node *)(uintptr_t) (EDGE_IS_VAR_CONSTANT | NEGATE_EDGE)};