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//=- Deserialize.h - Generic Object Deserialization from Bitcode --*- C++ -*-=//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Ted Kremenek and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the interface for generic object deserialization from
// LLVM bitcode.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_BITCODE_SERIALIZE_INPUT
#define LLVM_BITCODE_SERIALIZE_INPUT
#include "llvm/Bitcode/BitstreamReader.h"
#include "llvm/Bitcode/Serialization.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/DataTypes.h"
#include <vector>
namespace llvm {
class Deserializer {
//===----------------------------------------------------------===//
// Internal type definitions.
//===----------------------------------------------------------===//
struct BPNode {
BPNode* Next;
uintptr_t& PtrRef;
BPNode(BPNode* n, uintptr_t& pref)
: Next(n), PtrRef(pref) {
PtrRef = 0;
}
};
struct BPEntry {
union { BPNode* Head; void* Ptr; };
BPEntry() : Head(NULL) {}
static inline bool isPod() { return true; }
void SetPtr(BPNode*& FreeList, void* P);
};
class BPKey {
unsigned Raw;
public:
BPKey(unsigned PtrId) : Raw(PtrId << 1) { assert (PtrId > 0); }
BPKey(unsigned code, unsigned) : Raw(code) {}
void MarkFinal() { Raw |= 0x1; }
bool hasFinalPtr() const { return Raw & 0x1 ? true : false; }
unsigned getID() const { return Raw >> 1; }
static inline BPKey getEmptyKey() { return BPKey(0,0); }
static inline BPKey getTombstoneKey() { return BPKey(1,0); }
static inline unsigned getHashValue(const BPKey& K) { return K.Raw & ~0x1; }
static bool isEqual(const BPKey& K1, const BPKey& K2) {
return (K1.Raw ^ K2.Raw) & ~0x1 ? false : true;
}
static bool isPod() { return true; }
};
typedef llvm::DenseMap<BPKey,BPEntry,BPKey,BPEntry> MapTy;
//===----------------------------------------------------------===//
// Internal data members.
//===----------------------------------------------------------===//
BitstreamReader& Stream;
SmallVector<uint64_t,10> Record;
unsigned RecIdx;
BumpPtrAllocator Allocator;
BPNode* FreeList;
MapTy BPatchMap;
//===----------------------------------------------------------===//
// Public Interface.
//===----------------------------------------------------------===//
public:
Deserializer(BitstreamReader& stream);
~Deserializer();
uint64_t ReadInt();
bool ReadBool() {
return ReadInt() ? true : false;
}
template <typename T>
inline T& Read(T& X) {
SerializeTrait<T>::Read(*this,X);
return X;
}
template <typename T>
inline T* Materialize() {
return SerializeTrait<T>::Materialize(*this);
}
char* ReadCStr(char* cstr = NULL, unsigned MaxLen=0, bool isNullTerm=true);
void ReadCStr(std::vector<char>& buff, bool isNullTerm=false);
template <typename T>
inline T* ReadOwnedPtr() {
unsigned PtrId = ReadInt();
if (PtrId == 0)
return NULL;
T* x = SerializeTrait<T>::Materialize(*this);
RegisterPtr(PtrId,x);
return x;
}
template <typename T>
inline void ReadOwnedPtr(T*& Ptr) {
Ptr = ReadOwnedPtr<T>();
}
template <typename T>
void ReadPtr(T*& PtrRef) {
ReadUIntPtr(reinterpret_cast<uintptr_t&>(PtrRef));
}
template <typename T>
void ReadPtr(const T*& PtrRef) {
ReadPtr(const_cast<T*&>(PtrRef));
}
void ReadUIntPtr(uintptr_t& PtrRef);
template <typename T>
T& ReadRef() {
T* p = reinterpret_cast<T*>(ReadInternalRefPtr());
return *p;
}
void RegisterPtr(unsigned PtrId, const void* Ptr);
void RegisterPtr(const void* Ptr) {
RegisterPtr(ReadInt(),Ptr);
}
bool AtEnd();
private:
void ReadRecord();
bool inRecord();
uintptr_t ReadInternalRefPtr();
static inline bool HasFinalPtr(MapTy::value_type& V) {
return V.first.hasFinalPtr();
}
static inline uintptr_t GetFinalPtr(MapTy::value_type& V) {
return reinterpret_cast<uintptr_t>(V.second.Ptr);
}
static inline BPNode* GetBPNode(MapTy::value_type& V) {
return V.second.Head;
}
static inline void SetBPNode(MapTy::value_type& V, BPNode* N) {
V.second.Head = N;
}
void SetPtr(MapTy::value_type& V, const void* P) {
V.first.MarkFinal();
V.second.SetPtr(FreeList,const_cast<void*>(P));
}
};
} // end namespace llvm
#endif
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