cstringpool.h

//==========================================================================
//  CSTRINGPOOL.H - part of
//                     OMNeT++/OMNEST
//            Discrete System Simulation in C++
//
//==========================================================================

/*--------------------------------------------------------------*
  Copyright (C) 1992-2017 Andras Varga
  Copyright (C) 2006-2017 OpenSim Ltd.

  This file is distributed WITHOUT ANY WARRANTY. See the file
  `license' for details on this and other legal matters.
*--------------------------------------------------------------*/

#ifndef __OMNETPP_CSTRINGPOOL_H
#define __OMNETPP_CSTRINGPOOL_H

#include <string>
#include <map>
#include "simkerneldefs.h"
#include "simutil.h"

namespace omnetpp {

class cStringPool
{
  protected:
    struct strless {
        bool operator()(const char *s1, const char *s2) const {
            int d0 = *s1 - *s2;
            if (d0<0) return true; else if (d0>0) return false;
            return strcmp(s1,s2) < 0;  // note: (s1+1,s2+1) not good because either strings may be empty
        }
    };
    std::string name;
    typedef std::map<char *,int,strless> StringIntMap;
    StringIntMap pool; // map<string,refcount>
    bool alive; // useful when stringpool is a global variable

  public:
    cStringPool(const char *poolName=nullptr);

    ~cStringPool();

    const char *get(const char *s);

    const char *peek(const char *s) const;

    void release(const char *s);

    void dump() const;
};

}  // namespace omnetpp


#endif