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1 // © 2016 and later: Unicode, Inc. and others.
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2 // License & terms of use: http://www.unicode.org/copyright.html
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3 /*
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4 ******************************************************************************
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5 *
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6 * Copyright (C) 2012,2014 International Business Machines
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7 * Corporation and others. All Rights Reserved.
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8 *
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9 ******************************************************************************
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10 */
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11
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12 /**
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13 * \file
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14 * \brief C++: internal template EnumSet<>
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15 */
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16
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17 #ifndef ENUMSET_H
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18 #define ENUMSET_H
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19
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20 #include "unicode/utypes.h"
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21
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22 #if U_SHOW_CPLUSPLUS_API
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23
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24 U_NAMESPACE_BEGIN
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25
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26 /* Can't use #ifndef U_HIDE_INTERNAL_API for the entire EnumSet class, needed in .h file declarations */
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27 /**
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28 * enum bitset for boolean fields. Similar to Java EnumSet<>.
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29 * Needs to range check. Used for private instance variables.
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30 * @internal
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31 * \cond
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32 */
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33 template<typename T, uint32_t minValue, uint32_t limitValue>
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34 class EnumSet {
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35 public:
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36 inline EnumSet() : fBools(0) {}
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37 inline EnumSet(const EnumSet<T,minValue,limitValue>& other) : fBools(other.fBools) {}
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38 inline ~EnumSet() {}
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39 #ifndef U_HIDE_INTERNAL_API
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40 inline void clear() { fBools=0; }
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41 inline void add(T toAdd) { set(toAdd, 1); }
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42 inline void remove(T toRemove) { set(toRemove, 0); }
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43 inline int32_t contains(T toCheck) const { return get(toCheck); }
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44 inline void set(T toSet, int32_t v) { fBools=(fBools&(~flag(toSet)))|(v?(flag(toSet)):0); }
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45 inline int32_t get(T toCheck) const { return (fBools & flag(toCheck))?1:0; }
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46 inline UBool isValidEnum(T toCheck) const { return (toCheck>=minValue&&toCheck<limitValue); }
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47 inline UBool isValidValue(int32_t v) const { return (v==0||v==1); }
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48 inline const EnumSet<T,minValue,limitValue>& operator=(const EnumSet<T,minValue,limitValue>& other) {
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49 fBools = other.fBools;
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50 return *this;
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51 }
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52
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53 inline uint32_t getAll() const {
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54 return fBools;
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55 }
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56 #endif /* U_HIDE_INTERNAL_API */
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57
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58 private:
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59 inline uint32_t flag(T toCheck) const { return (1<<(toCheck-minValue)); }
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60 private:
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61 uint32_t fBools;
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62 };
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63
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64 /** \endcond */
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65
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66 U_NAMESPACE_END
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67
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68 #endif /* U_SHOW_CPLUSPLUS_API */
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69 #endif /* ENUMSET_H */
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