TAKE_DataId.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * NAME:        TAKE_DataId.h ( TAKE Library, C++)
 *
 * COMMENTS:    An identifier object for TAKE_Data
 */

#ifndef __TAKE_Hash__
#define __TAKE_Hash__

#include "TAKE_API.h"

#include <UT/UT_NonCopyable.h>
#include <UT/UT_StringHolder.h>
#include <SYS/SYS_Hash.h>

class TAKE_API TAKE_DataId final
{
public:
    TAKE_DataId(int opid, const UT_StringHolder &label)
    {
        myLabel = label;
        myOpId  = opid;
    }

    bool operator==(const TAKE_DataId &key) const
    {
        return myOpId == key.myOpId && myLabel == key.myLabel;
    }
    bool operator!=(const TAKE_DataId &key) const
    {
        return myOpId != key.myOpId || myLabel != key.myLabel;
    }
    
    size_t hash() const
    {
        SYS_HashType hash = myLabel.hash();
        SYShashCombine(hash, myOpId);
        return hash;
    }

    int64 getMemoryUsage(bool inclusive) const
    {
        // NOTE: We could try to count myLabel, but it might be
        //       shared by millions of TAKE_Hash objects.
        return inclusive ? sizeof(*this) : 0;
    }

    UT_StringRef getLabel() const       { return myLabel; }
    int          getOpId() const        { return myOpId; }

    struct Hasher
    {
        size_t operator()(const TAKE_DataId &k) const
        {
            return k.hash();
        }
    };
private:
    UT_StringHolder myLabel;
    int          myOpId;
};

#endif