7 #define EDGE_IS_VAR_CONSTANT 2
9 #define EDGE_MASK (NEGATE_EDGE | EDGE_IS_VAR_CONSTANT)
14 typedef struct Edge Edge;
17 typedef struct Node Node;
31 typedef enum NodeType NodeType;
43 typedef struct Node Node;
45 #define DEFAULT_CNF_ARRAY_SIZE 2048
50 IncrementalSolver *solver;
57 typedef struct CNF CNF;
59 static inline Edge constraintNegate(Edge e) {
60 Edge eneg = { (Node *) (((uintptr_t) e.node_ptr) ^ NEGATE_EDGE)};
64 static inline bool sameNodeVarEdge(Edge e1, Edge e2) {
65 return !(((uintptr_t) e1.node_ptr ^ (uintptr_t) e2.node_ptr) & (~(uintptr_t) NEGATE_EDGE));
68 static inline bool sameSignEdge(Edge e1, Edge e2) {
69 return !(((uintptr_t) e1.node_ptr ^ (uintptr_t) e2.node_ptr) & NEGATE_EDGE);
72 static inline bool sameNodeOppSign(Edge e1, Edge e2) {
73 return (((uintptr_t) e1.node_ptr) ^ ((uintptr_t)e2.node_ptr)) == NEGATE_EDGE;
76 static inline bool isNegEdge(Edge e) {
77 return ((uintptr_t)e.node_ptr) & NEGATE_EDGE;
80 static inline bool isPosEdge(Edge e) {
81 return !(((uintptr_t)e.node_ptr) & NEGATE_EDGE);
84 static inline bool isNodeEdge(Edge e) {
85 return !(((uintptr_t)e.node_ptr) & EDGE_IS_VAR_CONSTANT);
88 static inline bool isNegNodeEdge(Edge e) {
89 return (((uintptr_t) e.node_ptr) & (NEGATE_EDGE | EDGE_IS_VAR_CONSTANT)) == NEGATE_EDGE;
92 static inline bool isPosNodeEdge(Edge e) {
93 return (((uintptr_t) e.node_ptr) & (NEGATE_EDGE | EDGE_IS_VAR_CONSTANT)) == 0;
96 static inline Node *getNodePtrFromEdge(Edge e) {
97 return (Node *) (((uintptr_t) e.node_ptr) & ~((uintptr_t) EDGE_MASK));
100 static inline NodeType getNodeType(Edge e) {
101 Node *n = getNodePtrFromEdge(e);
105 static inline bool equalsEdge(Edge e1, Edge e2) {
106 return e1.node_ptr == e2.node_ptr;
109 static inline bool ltEdge(Edge e1, Edge e2) {
110 return (uintptr_t) e1.node_ptr < (uintptr_t) e2.node_ptr;
113 static inline uint getNodeSize(Edge e) {
114 Node *n = getNodePtrFromEdge(e);
118 static inline Edge *getEdgeArray(Edge e) {
119 Node *n = getNodePtrFromEdge(e);
123 static inline Edge getNonNeg(Edge e) {
124 Edge enew = {(Node *)(((uintptr_t)e.node_ptr) & (~((uintptr_t)NEGATE_EDGE)))};
128 static inline bool edgeIsConst(Edge e) {
129 return (((uintptr_t) e.node_ptr) & ~((uintptr_t)NEGATE_EDGE)) == EDGE_IS_VAR_CONSTANT;
132 static inline bool edgeIsNull(Edge e) {
133 return e.node_ptr == NULL;
136 static inline bool edgeIsVarConst(Edge e) {
137 return ((uintptr_t)e.node_ptr) & EDGE_IS_VAR_CONSTANT;
140 static inline Edge constraintNegateIf(Edge e, bool negate) {
141 Edge eret = {(Node *)(((uintptr_t)e.node_ptr) ^ negate)};
145 static inline Literal getEdgeVar(Edge e) {
146 int val = (int) (((uintptr_t) e.node_ptr) >> VAR_SHIFT);
147 return isNegEdge(e) ? -val : val;
151 void deleteCNF(CNF *cnf);
152 void resetCNF(CNF *cnf);
154 uint hashNode(NodeType type, uint numEdges, Edge *edges);
155 Node *allocNode(NodeType type, uint numEdges, Edge *edges);
156 bool compareNodes(Node *node, NodeType type, uint numEdges, Edge *edges);
157 Edge createNode(NodeType type, uint numEdges, Edge *edges);
158 Edge constraintOR(CNF *cnf, uint numEdges, Edge *edges);
159 Edge constraintAND(CNF *cnf, uint numEdges, Edge *edges);
160 Edge constraintOR2(CNF *cnf, Edge left, Edge right);
161 Edge constraintAND2(CNF *cnf, Edge left, Edge right);
162 Edge constraintIMPLIES(CNF *cnf, Edge left, Edge right);
163 Edge constraintIFF(CNF *cnf, Edge left, Edge right);
164 static inline Edge constraintXOR(CNF *cnf, Edge left, Edge right) {return constraintNegate(constraintIFF(cnf, left,right));}
165 Edge constraintITE(CNF *cnf, Edge cond, Edge thenedge, Edge elseedge);
166 Edge constraintNewVar(CNF *cnf);
167 void countPass(CNF *cnf);
168 void countConstraint(CNF *cnf, VectorEdge *stack, Edge e);
169 void addConstraintCNF(CNF *cnf, Edge constraint);
170 int solveCNF(CNF *cnf);
171 bool getValueCNF(CNF *cnf, Edge var);
172 void printCNF(Edge e);
173 Node *allocBaseNode(NodeType type, uint numEdges);
174 Node *allocResizeNode(uint capacity);
175 Edge cloneEdge(Edge e);
176 void addEdgeToResizeNode(Node **node, Edge e);
177 void mergeFreeNodeToResizeNode(Node **node, Node *innode);
178 void mergeNodeToResizeNode(Node **node, Node *innode);
179 void freeEdgeRec(Edge e);
180 void outputCNF(CNF *cnf, Edge cnfform);
181 void outputCNFOR(CNF *cnf, Edge cnfform, Edge eorvar);
182 void generateProxy(CNF *cnf, Edge expression, Edge proxy, Polarity p);
184 Edge generateBinaryConstraint(CNF *cnf, uint numvars, Edge *vars, uint value);
185 Edge generateLTValueConstraint(CNF *cnf, uint numvars, Edge *vars, uint value);
186 Edge generateEquivNVConstraint(CNF *cnf, uint numvars, Edge *var1, Edge *var2);
187 Edge generateLTConstraint(CNF *cnf, uint numvars, Edge *var1, Edge *var2);
188 Edge generateLTEConstraint(CNF *cnf, uint numvars, Edge *var1, Edge *var2);