TAKE/TAKE_Hash.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.
 *
 * Produced by:
 *      Side Effects Software Inc
 *      477 Richmond Street West
 *      Toronto, Ontario
 *      Canada   M5V 3E7
 *      416-504-9876
 *
 * NAME:        TAKE_Hash.h ( TAK Library, C++)
 *
 * COMMENTS:    Hashing function to store TAK Data
 */

#ifndef __TAKE_Hash__
#define __TAKE_Hash__

#include "TAKE_API.h"
#include <SYS/SYS_Math.h>
#include <UT/UT_Hash.h>
#include <UT/UT_String.h>
#include <UT/UT_SharedString.h>

class TAKE_API TAKE_Hash : public UT_Hash {
public:
    TAKE_Hash(int opid, const char *label)
    {
        myLabel = allocString(label);
        myOpId  = opid;
        myHash  = UT_String::hash(label);
        myHash ^= SYSwang_inthash(myOpId);
    }
    TAKE_Hash(const TAKE_Hash &src)
        : UT_Hash()
    {
        myLabel = allocString(src.myLabel);
        myOpId = src.myOpId;
        myHash = src.myHash;    // Use pre-computed hash
    }
    virtual ~TAKE_Hash();

    virtual int         compare(const UT_Hash &a) const;
    virtual void        copy(const UT_Hash &a);
    virtual unsigned    hash() const;
    virtual UT_Hash     *copy() const;

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

    static UT_SharedString &getStringTable();

private:
    const char  *allocString(const char *str);

    const char  *myLabel;
    int          myOpId;
    uint         myHash;
};

#endif

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