// © 2016 and later: Unicode, Inc. and others.

// License & terms of use: http://www.unicode.org/copyright.html

/*

******************************************************************************

*

*   Copyright (C) 2012,2014 International Business Machines

*   Corporation and others.  All Rights Reserved.

*

******************************************************************************

*/

/**

 * \file

 * \brief C++: internal template EnumSet<>

 */

#ifndef ENUMSET_H

#define ENUMSET_H

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

U_NAMESPACE_BEGIN

/* Can't use #ifndef U_HIDE_INTERNAL_API for the entire EnumSet class, needed in .h file declarations */

/**

 * enum bitset for boolean fields. Similar to Java EnumSet<>. 

 * Needs to range check. Used for private instance variables.

 * @internal

 * \cond

 */

template<typename T, uint32_t minValue, uint32_t limitValue>

class EnumSet {

public:

    inline EnumSet() : fBools(0) {}

    inline EnumSet(const EnumSet<T,minValue,limitValue>& other) : fBools(other.fBools) {}

    inline ~EnumSet() {}

#ifndef U_HIDE_INTERNAL_API

    inline void clear() { fBools=0; }

    inline void add(T toAdd) { set(toAdd, 1); }

    inline void remove(T toRemove) { set(toRemove, 0); }

    inline int32_t contains(T toCheck) const { return get(toCheck); }

    inline void set(T toSet, int32_t v) { fBools=(fBools&(~flag(toSet)))|(v?(flag(toSet)):0); }

    inline int32_t get(T toCheck) const { return (fBools & flag(toCheck))?1:0; }

    inline UBool isValidEnum(T toCheck) const {  return (toCheck>=minValue&&toCheck<limitValue); }

    inline UBool isValidValue(int32_t v) const { return (v==0||v==1); }

    inline const EnumSet<T,minValue,limitValue>& operator=(const EnumSet<T,minValue,limitValue>& other) {

        fBools = other.fBools;

        return *this;

    }

    inline uint32_t getAll() const {

        return fBools; 

    }

#endif /* U_HIDE_INTERNAL_API */

private:

    inline uint32_t flag(T toCheck) const { return (1<<(toCheck-minValue)); }

private:

    uint32_t fBools;

};

/** \endcond */

U_NAMESPACE_END

#endif /* U_SHOW_CPLUSPLUS_API */

#endif /* ENUMSET_H */