public int indexBinaryStateUnsafeIndexing(char key) {
   if (key != 0 && key != zeroMask) {
     char[] keys = set;
     long capacityMask = (long) (keys.length - 1);
     long index = ((long) Primitives.hashCode(key)) & capacityMask;
     long offset = index << CHAR_SCALE_SHIFT;
     long CHAR_BASE = UnsafeConstants.CHAR_BASE;
     char cur = U.getChar(keys, CHAR_BASE + offset);
     if (cur == key) {
       return (int) index;
     } else {
       if (cur == 0) {
         return -1;
       } else {
         long capacityOffsetMask = capacityMask << CHAR_SCALE_SHIFT;
         while (true) {
           offset = (offset + CHAR_SCALE) & capacityOffsetMask;
           if ((cur = U.getChar(keys, CHAR_BASE + offset)) == key) {
             return (int) (offset >> CHAR_SCALE_SHIFT);
           } else if (cur == 0) {
             return -1;
           }
         }
       }
     }
   } else {
     return -1;
   }
 }
 public boolean addBinaryStateUnsafeIndexing(char key) {
   if (key == 0 || key == zeroMask) {
     return false;
   }
   char[] keys = set;
   long capacityMask = (long) (keys.length - 1);
   long index = ((long) Primitives.hashCode(key)) & capacityMask;
   long offset = index << CHAR_SCALE_SHIFT;
   char cur = U.getChar(keys, CHAR_BASE + offset);
   keyAbsent:
   if (cur != 0) {
     if (cur == key) {
       return false;
     } else {
       long capacityOffsetMask = capacityMask << CHAR_SCALE_SHIFT;
       while (true) {
         offset = (offset + CHAR_SCALE) & capacityOffsetMask;
         if ((cur = U.getChar(keys, CHAR_BASE + offset)) == 0) {
           break keyAbsent;
         } else if (cur == key) {
           return false;
         }
       }
     }
   }
   // key is absent
   U.putChar(keys, CHAR_BASE + offset, key);
   size++;
   return true;
 }
 public boolean removeUnsafeIndexing(char key) {
   if (key == 0 || key == zeroMask) {
     return false;
   }
   char[] keys = set;
   int capacity = set.length;
   int capacityMask = capacity - 1;
   long capacityOffsetMask = ((long) capacityMask) << CHAR_SCALE_SHIFT;
   long index = (long) (Primitives.hashCode(key) & capacityMask);
   long offset = index << CHAR_SCALE_SHIFT;
   char cur = U.getChar(keys, CHAR_BASE + offset);
   keyPresent:
   if (cur != key) {
     if (cur == 0) return false;
     while (true) {
       offset = (offset + CHAR_SCALE) & capacityOffsetMask;
       if ((cur = U.getChar(keys, CHAR_BASE + offset)) == key) {
         break keyPresent;
       } else if (cur == 0) {
         return false;
       }
     }
   }
   // key is present
   long offsetToRemove = offset;
   long offsetToShift = offset;
   int shiftDistance = 1;
   while (true) {
     offsetToShift = (offsetToShift + CHAR_SCALE) & capacityOffsetMask;
     char keyToShift = U.getChar(keys, CHAR_BASE + offsetToShift);
     if (keyToShift == 0) break;
     int indexToShift = (int) (offsetToShift >> CHAR_SCALE_SHIFT);
     int keyDistance = (indexToShift - Primitives.hashCode(keyToShift)) & capacityMask;
     if (keyDistance >= shiftDistance) {
       U.putChar(keys, CHAR_BASE + offsetToRemove, keyToShift);
       offsetToRemove = offsetToShift;
       shiftDistance = 1;
     } else {
       shiftDistance++;
     }
   }
   U.putChar(keys, CHAR_BASE + offsetToRemove, (char) 0);
   return true;
 }
Exemplo n.º 4
0
 final long readSlot(long slotIndex) {
   return U.getChar(this, HASH_TABLE_OFFSET + (slotIndex << 1));
 }