NodeRecorder* createNodeRecorder(VTDNav *vn){
exception e;
NodeRecorder *nr;
if (vn==NULL){
throwException2(invalid_argument,
"NodeRecorder allocation failed ");
return NULL;
}
nr = (NodeRecorder*) malloc(sizeof(NodeRecorder));
if (nr==NULL) {
throwException2(out_of_mem,
"NodeRecorder allocation failed ");
return NULL;
}
nr->vn = vn;
Try{
nr->fib = createFastIntBuffer2(BUF_SZ_EXPO);
}Catch(e){
free(nr);
throwException2(out_of_mem,
"NodeRecorder allocation failed ");
return NULL;
}
nr->count = nr->size = nr->position = 0;
return nr;
}
int evalNodeSet_ce (cachedExpr *ce,VTDNav *vn){
int i=-1;
if (ce->cached){
if (ce->count<ce->ens->size){
i=intAt(ce->ens,ce->count);
recoverNode(vn,i);
ce->count++;
return i;
}else
return -1;
}else{
ce->cached = TRUE;
if (ce->ens==NULL){
ce->ens = createFastIntBuffer2(8);//page size 64
}
//record node set
while((i=ce->e->evalNodeSet(ce->e,vn))!=-1){
appendInt(ce->ens,i);
}
ce->e->reset(ce->e,vn);
if(ce->ens->size>0){
i=intAt(ce->ens,ce->count);//count should be zero
recoverNode(vn,i);
vn->count++;
return i;
}else
return -1;
}
}
static Boolean compNodeSetNodeSet(binaryExpr *be, expr* left, expr* right, VTDNav *vn, opType op){
exception e;
int i,i1,k,s1,stackSize;
Try {
if (be->fib1 == NULL)
be->fib1 = createFastIntBuffer2(BUF_SZ_EXP);
push2(vn);
stackSize = vn->contextBuf2->size;
while ((i = be->left->evalNodeSet(be->left,vn)) != -1) {
i1 = getStringVal(vn,i);
if (i1 != -1)
appendInt(be->fib1,i1);
}
be->left->reset(be->left,vn);
vn->contextBuf2->size = stackSize;
pop2(vn);
push2(vn);
stackSize = vn->contextBuf2->size;
while ((i = be->right->evalNodeSet(be->right,vn)) != -1) {
i1 = getStringVal(vn,i);
if (i1 != -1){
s1 = be->fib1->size;
for (k = 0; k < s1; k++) {
Boolean b = compareVV(be,intAt(be->fib1,k),vn,i1,op);
if (b){
clearFastIntBuffer(be->fib1);
vn->contextBuf2->size = stackSize;
pop2(vn);
be->right->reset(be->right,vn);
return TRUE;
}
}
}
}
vn->contextBuf2->size = stackSize;
pop2(vn);
be->right->reset(be->right,vn);
clearFastIntBuffer(be->fib1);
return FALSE;
} Catch (e) {
if (e.et == out_of_mem){
Throw e;
}
if(be->fib1!=NULL)
clearFastIntBuffer(be->fib1);
e.et = other_exception;
e.msg = "undefined run time behavior in computerEQNE";
Throw e;
}
return FALSE;
}