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#include <pin.H>
#include <map>
#include <fstream>
#include <iostream>

class REF
{
  public:
    REF(UINT64 global, UINT64 nonglobal) 
    {
        _global = global;
        _nonglobal = nonglobal;
    };
    BOOL PredictNonGlobal() const;
    UINT64 Count() const 
    {
        return _global + _nonglobal;
    };
    
    
    UINT64 _global;
    UINT64 _nonglobal;
};

class PROFILE
{
  private:
    typedef map<string, REF> REFS;
    
  public:
    VOID ReadFile(char * filename);
    UINT64 SumRefs();
    VOID NonGlobalPredicts(PROFILE * fullProfile, UINT64 * correct, UINT64 * incorrect, UINT64 * predicted);
    
    REFS _refs;
    UINT32 _tracesCodeCacheSize;
    UINT32 _expiredTracesCodeCacheSize;
    float _cpuTime;
};

BOOL REF::PredictNonGlobal() const
{
    return (float)_global/(_global + _nonglobal) < .01;
}

VOID PROFILE::ReadFile(CHAR * filename)
{
    ifstream infile(filename);

    if (!infile)
    {
        cerr << "Could not open " << filename << endl;
        exit(1);
    }

    while(true)
    {
        string command;
        
        infile >> command;

        if (command == "BeginProfile")
        {
            break;
        }
        else if (command == "TracesCodeCacheSize")
        {
            infile >> _tracesCodeCacheSize;
        }
        else if (command == "ExpiredTracesCodeCacheSize")
        {
            infile >> _expiredTracesCodeCacheSize;
        }
        else if (command == "CpuTime")
        {
            infile >> _cpuTime;
        }
        else
        {
            cerr << "Unknown command " << command << endl;
            exit(1);
        }
    }

    while(true)
    {
        string address;
        UINT64 global;
        UINT64 nonglobal;
        
        infile >> address;

        if (infile.eof())
            break;
        
        infile >> global;
        infile >> nonglobal;

        _refs.insert(pair<string,REF>(address,REF(global,nonglobal)));
    }
}

UINT64 PROFILE::SumRefs()
{
    UINT64 numRefs = 0;
    
    for (REFS::const_iterator ri = _refs.begin(); ri != _refs.end(); ri++)
    {
        numRefs += ri->second.Count();
    }

    return numRefs;
}

    
// The number of dynamic times we predicted non-global and were wrong
// Use the fullprofile for the correct/incorrect counts
// also compute number of global predicts using our count
VOID PROFILE::NonGlobalPredicts(PROFILE * fullProfile, UINT64 * correct, UINT64 * incorrect, UINT64 * predicted)
{
    *correct = 0;
    *incorrect = 0;
    *predicted = 0;
    
    for (REFS::const_iterator ri = _refs.begin(); ri != _refs.end(); ri++)
    {
        string address = ri->first;
        const REF & partialRef = ri->second;
        
        if (partialRef.PredictNonGlobal())
        {
            *predicted += partialRef.Count();
            
            REFS::iterator ri = fullProfile->_refs.find(address);

            // Nothing in the reference? It is not a problem.
            if (ri == fullProfile->_refs.end())
                continue;

            REF & fullRef = ri->second;
            
            if (fullRef.PredictNonGlobal())
                *correct += fullRef.Count();
            else
                *incorrect += fullRef.Count();
        }
    }
}

    
int main(int argc, char * argv[])
{
    if (argc < 3)
    {
        fprintf(stderr,"Usage: %s <fullprofile> <partialprofile>\n",argv[0]);
        exit(1);
    }

    PROFILE fullProfile, partialProfile;
    fullProfile.ReadFile(argv[1]);
    partialProfile.ReadFile(argv[2]);

    //UINT64 fullNumRefs = fullProfile.SumRefs();

    UINT64 partialCorrect, partialIncorrect, partialPredicts;
    partialProfile.NonGlobalPredicts(&fullProfile, &partialCorrect, &partialIncorrect, &partialPredicts);

    UINT64 fullCorrect, fullIncorrect, fullPredicts;
    fullProfile.NonGlobalPredicts(&fullProfile, &fullCorrect, &fullIncorrect, &fullPredicts);

    cout << "CpuTime " << partialProfile._cpuTime << endl;
    cout << "ExpiredTraces " << partialProfile._expiredTracesCodeCacheSize << " " << partialProfile._tracesCodeCacheSize
         << " " << (float)partialProfile._expiredTracesCodeCacheSize/(float)partialProfile._tracesCodeCacheSize << endl;
    cout << "NonGlobalCoverage " << partialCorrect << " " << fullPredicts << " " << (float)partialCorrect/(float)fullPredicts << endl;
    cout << "NonGlobalMispredict " << partialIncorrect << " " << fullPredicts << " " << (float)partialIncorrect/(float)fullPredicts << endl;
}