tor-browser

The Tor Browser
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enumset.h (2130B)

      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 
     24 U_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 */
     33 template<typename T, uint32_t minValue, uint32_t limitValue>
     34 class EnumSet {
     35 public:
     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 
     58 private:
     59    inline uint32_t flag(T toCheck) const { return (1<<(toCheck-minValue)); }
     60 private:
     61    uint32_t fBools;
     62 };
     63 
     64 /** \endcond */
     65 
     66 U_NAMESPACE_END
     67 
     68 #endif /* U_SHOW_CPLUSPLUS_API */
     69 #endif /* ENUMSET_H */