icuSources/common/unicode/enumset.h

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