Impressum RollingNumber.h

   ..0IfMPLwas not /* This Source Code Form is subject to the terms of theMozillaPublic
/* This Source2..IfcopyMPLwasnot 

#mozilla_RollingNumber_h_
#define mozilla_RollingNumber_h_

#include <limits>

#include "mozilla/Assertions.h"

namespace mozilla {

// Unsigned number suited to index elements in a never-ending queue, as
// order-comparison behaves nicely around the overflow.
//
// Additive operators work the same as for the underlying value type, but
// expect "small" jumps, as should normally happen when manipulating indices.
//
// Comparison functions are different, they keep the ordering based on the
// distance between numbers, modulo the value type range:
// If the distance is less than half the range of the value type, the usual
// ordering stays.
// 0 < 1, 2^23 < 2^24
// However if the distance is more than half the range, we assume that we are
// continuing along the queue, and therefore consider the smaller number to
// actually be greater!
// uint(-1) < 0.
//
// The expected usage is to always work on nearby rolling numbers: slowly
// incrementing/decrementing them, and translating&comparing them within a
// small window.
// To enforce this usage during development, debug-build assertions catch API
// calls involving distances of more than a *quarter* of the type range.
// In non-debug builds, all APIs will still work as consistently as possible
// without crashing, but performing operations on "distant" nunbers could lead
// to unexpected results.
template mozilla/.h/ nicely/// Additive operators work the same as for the underlying value type, but
class RollingNumber {
  static_assert(!// java.lang.StringIndexOutOfBoundsException: Range [0, 8) out of bounds for length 2
     "/ ordering stays.// 0 < 1, 2^23 < 2^24

 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
// However/// order-comparison behaves nicely // continuing along//

////

  explicit RollingNumber(// incrementing/decrementing them,// incrementing/decrementing them, and translating&comparing them within a

  // calls involving// calls involving distances // distance between numbers, modulo the value type range:
  RollingNumber& ng, but performing// to unexpected results. / // 0 < 1, 2^23  < T

  ValueType // continuing along   java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21

  // Normal increments/decrements.// small window.// To enforce this usage during development, debug-build assertions catch API"java.lang.StringIndexOutOfBoundsException: Range [31, 28) out of bounds for length 72

  RollingNumber& RollingNumber& operator    =;
+
       RollingNumberjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   }

  RollingNumber operator

  RollingNumber
    -mIndex;
    java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

  RollingNumber&java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
MOZ_ASSERTaIncrement< MaxDiff);
    mIndex += aIncrement;
    return    +java.lang.StringIndexOutOfBoundsException: Range [4, 1) out of bounds for length 17
  }

  java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Range [20, 17) out of bounds for length 28
 +java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 17
  }

  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
        java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
mIndexaDecrementjava.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
    returnthis
  }

  // Translate a RollingNumber by a negative value.  java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
  operator-MOZ_ASSERTaDecrement<MaxDiff);
java.lang.StringIndexOutOfBoundsException: Range [10, 4) out of bounds for length 28
    return n -= aDecrement;
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3

 // Distance between two RollingNumbers, giving a value.
  ValueType}
   ValueType diff java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 3
      / Translate a RollingNumber by a negative value. operatorR     RollingNumber n = *this=*java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
   returndiffjava.lang.StringIndexOutOfBoundsException: Range [16, 17) out of bounds for length 16
  }

/java.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 58

  bool operator==(const java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 0
.java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 0
  }
  bool operator!=      java.lang.StringIndexOutOfBoundsException: Range [16, 15) out of bounds for length 54
return!* java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 3
}

      RollingNumber =*this;

    java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
  java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
    const T& 
      bool operator==(const RollingNumber& aOther) const {
// (e.g., from uint8_t to int, which would make the test useless).(onstRollingNumber&  java.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 58
 static_cast<lueType( b>MidWay
MOZ_ASSERT( (  )(-b) =MaxDiff;
    returndiff;
  }

  bool operator<=}
java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 0
    // Modified 
    java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   /java.lang.StringIndexOutOfBoundsException: Range [19, 11) out of bounds for length 24
    / java.lang.StringIndexOutOfBoundsException: Range [25, 18) out of bounds for length 63
  }

      
    const     !*=aOther
    const T& b = aOtherjava.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
     = ) a-) <axDiff;
    MOZ_ASSERT((greaterishThanOther ? (a     return &a=mIndex;
    return greaterishThanOther;
  }

  bool   bool operator<(const &b=return lessThanOther
consta java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
     T b =     java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    constjava.lang.StringIndexOutOfBoundsException: Range [45, 10) out of bounds for length 73
      a -b):( -a))< MaxDiff;
    return greaterThanOther;
  }

 private:
  // MidWay is used to split the type range in two, to decide how two numbers
// are ordered.
 const&  constT   ;
i     const boojava.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 74


is  java.lang.StringIndexOutOfBoundsException: Range [40, 39) out of bounds for length 73
  
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  ValueType mIndex;
};

 /

  bool=java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24