codekingpro/portable-devtools

1// © 2016 and later: Unicode, Inc. and others.
2// License & terms of use: http://www.unicode.org/copyright.html
3/*
4******************************************************************************
5*
6*   Copyright (C) 2012,2014 International Business Machines
7*   Corporation and others.  All Rights Reserved.
8*
9******************************************************************************
10*/
11
12/**
13 * \file
14 * \brief C++: internal template EnumSet<>
15 */
16
17#ifndef ENUMSET_H
18#define ENUMSET_H
19
20#include "unicode/utypes.h"
21
22#if U_SHOW_CPLUSPLUS_API
23
24U_NAMESPACE_BEGIN
25
26/* Can't use #ifndef U_HIDE_INTERNAL_API for the entire EnumSet class, needed in .h file declarations */
27/**
28 * enum bitset for boolean fields. Similar to Java EnumSet<>. 
29 * Needs to range check. Used for private instance variables.
30 * @internal
31 * \cond
32 */
33template<typename T, uint32_t minValue, uint32_t limitValue>
34class EnumSet {
35public:
36    inline EnumSet() : fBools(0) {}
37    inline EnumSet(const EnumSet<T,minValue,limitValue>& other) : fBools(other.fBools) {}
38    inline ~EnumSet() {}
39#ifndef U_HIDE_INTERNAL_API
40    inline void clear() { fBools=0; }
41    inline void add(T toAdd) { set(toAdd, 1); }
42    inline void remove(T toRemove) { set(toRemove, 0); }
43    inline int32_t contains(T toCheck) const { return get(toCheck); }
44    inline void set(T toSet, int32_t v) { fBools=(fBools&(~flag(toSet)))|(v?(flag(toSet)):0); }
45    inline int32_t get(T toCheck) const { return (fBools & flag(toCheck))?1:0; }
46    inline UBool isValidEnum(T toCheck) const {  return (toCheck>=minValue&&toCheck<limitValue); }
47    inline UBool isValidValue(int32_t v) const { return (v==0||v==1); }
48    inline const EnumSet<T,minValue,limitValue>& operator=(const EnumSet<T,minValue,limitValue>& other) {
49        fBools = other.fBools;
50        return *this;
51    }
52  
53    inline uint32_t getAll() const {
54        return fBools; 
55    }
56#endif /* U_HIDE_INTERNAL_API */
57
58private:
59    inline uint32_t flag(T toCheck) const { return (1<<(toCheck-minValue)); }
60private:
61    uint32_t fBools;
62};
63
64/** \endcond */
65
66U_NAMESPACE_END
67
68#endif /* U_SHOW_CPLUSPLUS_API */
69#endif /* ENUMSET_H */
70