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number.py
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number.py
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import re
class Number(object):
'''
A decimal (base 10), hex (base 16), binary (base 2) or octal (base 8) number
Binary format: (-0b|0b)[0-1]+
Hex format: (-0x|0x)[a-fA-F0-9]+
Octal format: (-0o|0o)[0-7]+
Decimal format: ([-]{0,1})[0-9]+
Max (unsigned long long): 18,446,744,073,709,551,615
Min (signed long long): -9,223,372,036,854,775,808
'''
def __init__(self):
self._number = 0
self._string = hex(0)
def fromString(self, string):
self._parse(string)
return self
def fromNumber(self, number):
if number < self.min or number > self.max:
raise ValueError(f'Number out of range: {number}')
self._number = number
self._setStringValues()
return self
@property
def min(self):
return -9_223_372_036_854_775_808
@property
def max(self):
return 18_446_744_073_709_551_615
@property
def asHex(self):
return self._asHex
@property
def asBinary(self):
return self._asBinary
@property
def asOctal(self):
return self._asOctal
@property
def asDecimal(self):
return self._asDecimal
@property
def number(self):
return self._number
def __invert__(self):
result = ~self._number
return Number().fromNumber(result)
def __add__(self, other):
result = self.number + other.number
return Number().fromNumber(result)
def __sub__(self, other):
result = self.number - other.number
return Number().fromNumber(result)
def __mul__(self, other):
result = self.number * other.number
return Number().fromNumber(result)
def __floordiv__(self, other):
result = self.number // other.number
return Number().fromNumber(result)
def __mod__(self, other):
result = self.number % other.number
return Number().fromNumber(result)
def __lshift__(self, amount):
if amount.number > 63 or amount.number < 0:
raise IndexError(f'Shift amount out of range: {amount.asDecimal}')
result = self.number << amount.number
return Number().fromNumber(result)
def __rshift__(self, amount):
if amount.number > 63 or amount.number < 0:
raise IndexError(f'Shift amount out of range: {amount.asDecimal}')
result = self.number >> amount.number
return Number().fromNumber(result)
def __xor__(self, other):
result = self.number ^ other.number
return Number().fromNumber(result)
def __and__(self, other):
result = self.number & other.number
return Number().fromNumber(result)
def __or__(self, other):
result = self.number | other.number
return Number().fromNumber(result)
def _parse(self, string):
if re.match("(-0b|0b)[0-1]+", string):
self._number = int(string, 2)
elif re.match("(-0x|0x)[a-fA-F0-9]+", string):
self._number = int(string, 16)
elif re.match("(-0o|0o)[0-7]+", string):
self._number = int(string, 8)
elif re.match("([-]{0,1})[0-9]+", string):
self._number = int(string, 10)
else:
print("Invalid format\n")
print(" Binary format: (-0b|0b)[0-1]+\n")
print(" Hex format: (-0x|0x)[a-fA-F0-9]+\n")
print(" Octal format: (-0o|0o)[0-7]+\n")
print(" Decimal format: ([-]{0,1})[0-9]+\n")
raise ValueError("Invalid format")
if self.number < self.min or self.number > self.max:
num = self._number
self._number = 0
raise ValueError(f'Number out of range: {num}')
self._setStringValues()
def _setStringValues(self):
self._asBinary = self._group(bin(self.number))
self._asHex = self._group(self.__str__())
self._asOctal = self._group(oct(self.number))
self._asDecimal = self._comma(str(self.number))
def _group(self, value):
'''
Put binary, hex and octal digits in groups of 4
0101 1001 0001 1000
ffff 0000
-0017
'''
start = 2
if value[0] == '-':
start = 3
digits = value[start:]
backwards = digits[::-1]
str = ""
for index in range(len(backwards)):
if index > 0 and index % 4 == 0:
str = f' {str}'
str = f'{backwards[index]}{str}'
fillers = 4 - (len(digits) % 4)
if fillers != 4:
for _ in range(fillers):
str = f'{0}{str}'
if start == 2:
return f'{str}'
else:
return f'-{str}'
def _comma(self, value):
'''
Add commas in decimal numbers
-1,699
100,000
92
'''
start = 0
if value[0] == '-':
start = 1
digits = value[start:]
backwards = digits[::-1]
str = ""
for index in range(len(backwards)):
if index > 0 and index % 3 == 0:
str = f',{str}'
str = f'{backwards[index]}{str}'
if start == 0:
return str
else:
return f'-{str}'
def __str__(self):
string = hex(self._number)
prefix = string[0:2]
hexChars = string[2:]
if string[0] == "-":
prefix = string[0:3]
hexChars = string[3:]
return prefix.lower() + hexChars.upper()
def __repr__(self):
return self.__str__()