mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-01 00:11:00 +00:00
d54a275ee1
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231425 91177308-0d34-0410-b5e6-96231b3b80d8
104 lines
3.3 KiB
C++
104 lines
3.3 KiB
C++
//===- BlotMapVector.h - A MapVector with the blot operation -*- C++ -*----===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/ADT/DenseMap.h"
|
|
#include <vector>
|
|
#include <algorithm>
|
|
|
|
namespace llvm {
|
|
/// \brief An associative container with fast insertion-order (deterministic)
|
|
/// iteration over its elements. Plus the special blot operation.
|
|
template <class KeyT, class ValueT> class BlotMapVector {
|
|
/// Map keys to indices in Vector.
|
|
typedef DenseMap<KeyT, size_t> MapTy;
|
|
MapTy Map;
|
|
|
|
typedef std::vector<std::pair<KeyT, ValueT>> VectorTy;
|
|
/// Keys and values.
|
|
VectorTy Vector;
|
|
|
|
public:
|
|
typedef typename VectorTy::iterator iterator;
|
|
typedef typename VectorTy::const_iterator const_iterator;
|
|
iterator begin() { return Vector.begin(); }
|
|
iterator end() { return Vector.end(); }
|
|
const_iterator begin() const { return Vector.begin(); }
|
|
const_iterator end() const { return Vector.end(); }
|
|
|
|
#ifdef XDEBUG
|
|
~BlotMapVector() {
|
|
assert(Vector.size() >= Map.size()); // May differ due to blotting.
|
|
for (typename MapTy::const_iterator I = Map.begin(), E = Map.end(); I != E;
|
|
++I) {
|
|
assert(I->second < Vector.size());
|
|
assert(Vector[I->second].first == I->first);
|
|
}
|
|
for (typename VectorTy::const_iterator I = Vector.begin(), E = Vector.end();
|
|
I != E; ++I)
|
|
assert(!I->first || (Map.count(I->first) &&
|
|
Map[I->first] == size_t(I - Vector.begin())));
|
|
}
|
|
#endif
|
|
|
|
ValueT &operator[](const KeyT &Arg) {
|
|
std::pair<typename MapTy::iterator, bool> Pair =
|
|
Map.insert(std::make_pair(Arg, size_t(0)));
|
|
if (Pair.second) {
|
|
size_t Num = Vector.size();
|
|
Pair.first->second = Num;
|
|
Vector.push_back(std::make_pair(Arg, ValueT()));
|
|
return Vector[Num].second;
|
|
}
|
|
return Vector[Pair.first->second].second;
|
|
}
|
|
|
|
std::pair<iterator, bool> insert(const std::pair<KeyT, ValueT> &InsertPair) {
|
|
std::pair<typename MapTy::iterator, bool> Pair =
|
|
Map.insert(std::make_pair(InsertPair.first, size_t(0)));
|
|
if (Pair.second) {
|
|
size_t Num = Vector.size();
|
|
Pair.first->second = Num;
|
|
Vector.push_back(InsertPair);
|
|
return std::make_pair(Vector.begin() + Num, true);
|
|
}
|
|
return std::make_pair(Vector.begin() + Pair.first->second, false);
|
|
}
|
|
|
|
iterator find(const KeyT &Key) {
|
|
typename MapTy::iterator It = Map.find(Key);
|
|
if (It == Map.end())
|
|
return Vector.end();
|
|
return Vector.begin() + It->second;
|
|
}
|
|
|
|
const_iterator find(const KeyT &Key) const {
|
|
typename MapTy::const_iterator It = Map.find(Key);
|
|
if (It == Map.end())
|
|
return Vector.end();
|
|
return Vector.begin() + It->second;
|
|
}
|
|
|
|
/// This is similar to erase, but instead of removing the element from the
|
|
/// vector, it just zeros out the key in the vector. This leaves iterators
|
|
/// intact, but clients must be prepared for zeroed-out keys when iterating.
|
|
void blot(const KeyT &Key) {
|
|
typename MapTy::iterator It = Map.find(Key);
|
|
if (It == Map.end())
|
|
return;
|
|
Vector[It->second].first = KeyT();
|
|
Map.erase(It);
|
|
}
|
|
|
|
void clear() {
|
|
Map.clear();
|
|
Vector.clear();
|
|
}
|
|
};
|
|
} //
|