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Add a lookup method to the IntervalMap. The difference from the original

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lookup is that if the lookup key is contained in the key, we return the data.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95070 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Zhongxing Xu 2010-02-02 05:23:23 +00:00
parent e3d6d220bd
commit b413bc1403
1 changed files with 36 additions and 1 deletions
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37
include/llvm/ADT/ImmutableIntervalMap.h
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@ -65,6 +65,13 @@ struct ImutIntervalInfo {
}
}
static bool isContainedIn(key_type_ref K, key_type_ref L) {
if (K.getStart() >= L.getStart() && K.getEnd() <= L.getEnd())
return true;
else
return false;
}
static void Profile(FoldingSetNodeID &ID, value_type_ref V) {
ID.AddInteger(V.first.getStart());
ID.AddInteger(V.first.getEnd());
@ -85,12 +92,26 @@ class ImutIntervalAVLFactory : public ImutAVLFactory<ImutInfo> {
typedef typename ImutInfo::data_type_ref data_type_ref;
public:
TreeTy *Add(TreeTy* T, value_type_ref V) {
TreeTy *Add(TreeTy *T, value_type_ref V) {
T = Add_internal(V,T);
MarkImmutable(T);
return T;
}
TreeTy *Find(TreeTy *T, key_type_ref K) {
if (!T)
return NULL;
key_type_ref CurrentKey = ImutInfo::KeyOfValue(Value(T));
if (ImutInfo::isContainedIn(K, CurrentKey))
return T;
else if (ImutInfo::isLess(K, CurrentKey))
return Find(Left(T), K);
else
return Find(Right(T), K);
}
private:
TreeTy *Add_internal(value_type_ref V, TreeTy *T) {
key_type_ref K = ImutInfo::KeyOfValue(V);
@ -198,7 +219,21 @@ public:
TreeTy *T = F.Remove(Old.Root, K);
return ImmutableIntervalMap(F.GetCanonicalTree(T));
}
data_type *Lookup(ImmutableIntervalMap M, key_type_ref K) {
TreeTy *T = F.Find(M.getRoot(), K);
if (T)
return &T->getValue().second;
else
return 0;
}
};
private:
// For ImmutableIntervalMap, the lookup operation has to be done by the
// factory.
data_type* lookup(key_type_ref K) const;
};
} // end namespace llvm