Побитовая операция в Python
"""
BITWISE OPERATION FILE: MAINTAINING CRUD BITWISE OPERAITON;
"""
def getBit(number, shift):
"""
GET_BIT: RETURN PARTICULAR BIT OF NUMBER PLACED AT 'i' POSITION;
"""
if number and shift >= 0:
mask = number >> shift
return (mask & 1)
else:
return None
def setBit(number, position):
"""
SET_BIT: RETURN PARTICULAR BIT OF NUMBER PLACED AT 'i' POSITION;
"""
if number and (position >= 0):
mask = 1 << position
return (mask | number)
else:
return None
def clearBit(number, position):
"""
CLEAR_BIT: CLEAR PARTICULAR BIT OF NUMBER PLACED AT 'i' POSITION;
"""
if number and (position >= 0):
mask = ~(1 << position)
return mask & number
else:
return None
def updateBit(number, position, value):
"""
UPDATE_BIT: UPDATE PARTICULAR BIT OF NUMBER PLACED AT 'i' POSITION;
"""
if (number and (position >= 0) and (value == 0 or 1)):
## Mask that ha set bit at particular place;
mask = ~(1 << position)
return (number & mask | value << position)
else:
return None
def clearBitTillPosition(number, position):
"""
CLEAR_BIT_TILL_POSITION: DELETE ALL BIT TILL POSITION 'K';
"""
if (number and (position >= 0)):
mask = -1 << position
return mask & number
else:
return None
def removeBitRange(number, start, end):
"""
REMOVE_BIT_RANGE: DELETE ALL BIT FROM INDEX START TO END;
"""
if (number and start >= 0 and end >= 0):
leftMask = ~0 << end + 1
rightMask = (1 << start) - 1
mask = leftMask | rightMask
return mask & number
else:
return None
## COUNT THE SET BIT IN NUMBER HACK;
def countBitHack(number):
if number != None:
count = 0
while (number > 0):
number = (number & number - 1)
count += 1
return count
else:
return None
## COUNT THE SET BIT IN NUMBER;
def countBit(number):
if number != None:
count = 0
while (number > 0):
count += number & 1
number = number >> 1
return count
else:
return None
## POWER OF 2
def powerOfTwo(number):
if number == 0:
return 0
elif number > 0:
if (number & number - 1) == 0:
return True
return False
else:
return False
## FAST EXPONENTIAL OF NUMBER;
def fastExpo(num, pow):
if (num and pow):
result = 1 # result = 1
while (pow > 0):
lastBit = (pow & 1) # bit = 11001
if lastBit:
result = result * num
num = num * num
pow = (pow >> 1)
return result
else:
return None
## CONVERT INTEGER TO BINARY;
def convertIntToBin(number):
base = 10
pow = 1
result = 0
while (number > 0):
lastBit = number & 1 ## Taking Out Last Bit;
result += lastBit * pow
pow = pow * base
number = number >> 1 ## Removing Bits From Left;
print(result)
## CHECK EVEN OR ODD IN NUMBER;
def evenOrOdd(number=None) -> bool:
dataType = type(number)
if dataType == list:
for num in number:
if (num & 1):
print(f"Num {num} is Odd")
else:
print(f"Num {num} is Even")
elif dataType == int:
if (number & 1):
print(f"Num {number} is Odd")
else:
print(f"Num {number} is Even")
else:
return False
return True
## FLIP ALL SET TO UNSET BIT;
def flipAllBits(num):
return (~num)^num
## FLIP 32BIT INTEGER;
def flip32BitInterger(num):
return (2**32-1)^num
Frail Fly
