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:
EnumSet()33     inline EnumSet() : fBools(0) {}
EnumSet(const EnumSet<T,minValue,limitValue> & other)34     inline EnumSet(const EnumSet<T,minValue,limitValue>& other) : fBools(other.fBools) {}
~EnumSet()35     inline ~EnumSet() {}
36 #ifndef U_HIDE_INTERNAL_API
clear()37     inline void clear() { fBools=0; }
add(T toAdd)38     inline void add(T toAdd) { set(toAdd, 1); }
remove(T toRemove)39     inline void remove(T toRemove) { set(toRemove, 0); }
contains(T toCheck)40     inline int32_t contains(T toCheck) const { return get(toCheck); }
set(T toSet,int32_t v)41     inline void set(T toSet, int32_t v) { fBools=(fBools&(~flag(toSet)))|(v?(flag(toSet)):0); }
get(T toCheck)42     inline int32_t get(T toCheck) const { return (fBools & flag(toCheck))?1:0; }
isValidEnum(T toCheck)43     inline UBool isValidEnum(T toCheck) const {  return (toCheck>=minValue&&toCheck<limitValue); }
isValidValue(int32_t v)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 
getAll()50     inline uint32_t getAll() const {
51         return fBools;
52     }
53 #endif /* U_HIDE_INTERNAL_API */
54 
55 private:
flag(T toCheck)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 */
65