def oct_to_hex(octnum):
"""Convert octal to hexadecimal.
Uses binary conversion as an intermediate step.
Instructions used for algorithm from:
wikipedia.org/wiki/Octal#Octal_to_hexadecimal_conversion
"""
hexnum, binary = '', ''
digits = unicode(octnum)
for digit in digits:
# Convert decimal to binary, pad where appropriate.
if digit == '0':
binnum = '000'
elif digit == '1':
binnum = '001'
else:
binnum = dec_to_bin(int(digit))
binnum = binnum.zfill(2)
binary += binnum
# Group remainder by 4 digits
bin_groups = make_groups(binary, 4)
if DEBUG:
print_vars([['bin group x 4', bin_groups],
['oct => hex (bin)', binary]])
for group in bin_groups:
# Add num, shave off individual 0x part from individual conversion.
hexnum += unicode(bin_to_hex(group))[2:]
return '0x{}'.format(hexnum)
def oct_to_hex(octnum):
"""Convert octal to hexadecimal.
Uses binary conversion as an intermediate step.
Instructions used for algorithm from:
wikipedia.org/wiki/Octal#Octal_to_hexadecimal_conversion
"""
hexnum, binary = '', ''
digits = unicode(octnum)
for digit in digits:
# Convert decimal to binary, pad where appropriate.
if digit == '0':
binnum = '000'
elif digit == '1':
binnum = '001'
else:
binnum = dec_to_bin(int(digit))
binnum = binnum.zfill(2)
binary += binnum
# Group remainder by 4 digits
bin_groups = make_groups(binary, 4)
if DEBUG:
print_vars(
[['bin group x 4', bin_groups], ['oct => hex (bin)', binary]])
for group in bin_groups:
# Add num, shave off individual 0x part from individual conversion.
hexnum += unicode(bin_to_hex(group))[2:]
return '0x{}'.format(hexnum)
def dec_to_bin(num):
"""Convert integer to binary. Only handles positive integers."""
if num == 0:
return '0'
bits = divide_by(abs(num), 2)
for k, bit in enumerate(bits):
# Pad digits if necessary
bits[k] = bit.zfill(1)
res = ''.join(bits)
if DEBUG:
print_vars([['dec', num], ['dec => bin', res]], convert=True)
return res
def dec_to_bin(num):
"""Convert integer to binary. Only handles positive integers."""
if num == 0:
return '0'
bits = divide_by(abs(num), 2)
for k, bit in enumerate(bits):
# Pad digits if necessary
bits[k] = bit.zfill(1)
res = ''.join(bits)
if DEBUG:
print_vars([['dec', num], ['dec => bin', res]], convert=True)
return res
def oct_to_bin(num):
"""Convert octal to binary
instructions used for algorithm from:
wikipedia.org/wiki/Octal#Octal_to_binary_conversion
"""
binary = ''
digits = unicode(num)
for digit in digits:
print_vars(['octal digit', digit])
binary += dec_to_bin(int(digit)).zfill(3)
if DEBUG:
print_vars(['octal to binary', binary])
return binary
def oct_to_bin(num):
"""Convert octal to binary
instructions used for algorithm from:
wikipedia.org/wiki/Octal#Octal_to_binary_conversion
"""
binary = ''
digits = unicode(num)
for digit in digits:
print_vars(['octal digit', digit])
binary += dec_to_bin(int(digit)).zfill(3)
if DEBUG:
print_vars(['octal to binary', binary])
return binary
def hex_to_oct(hexnum):
"""Convert hexadecimal to octal"""
hexnum = unicode(hexnum)
if hexnum.startswith('0x'):
hexnum = hexnum[2:]
octal = ''
binary = '0' + hex_to_bin(hexnum)
groups = make_groups(binary, 3)
if DEBUG:
print_vars(['Hex to octal', binary])
print_vars(['Hex to octal (binary groups)', groups])
for group in groups:
octal += unicode(bin_to_oct(group))
return int(octal)
def hex_to_oct(hexnum):
"""Convert hexadecimal to octal"""
hexnum = unicode(hexnum)
if hexnum.startswith('0x'):
hexnum = hexnum[2:]
octal = ''
binary = '0' + hex_to_bin(hexnum)
groups = make_groups(binary, 3)
if DEBUG:
print_vars(['Hex to octal', binary])
print_vars(['Hex to octal (binary groups)', groups])
for group in groups:
octal += unicode(bin_to_oct(group))
return int(octal)
def make_groups(string, count):
"""Make a set of groups with a string.
e.g. >>> make_groups('ABCDEFGH', 2) = [['AB', 'CD', 'EF', 'GH']]
Raises ValueError if modulus operation results in uneven group distribution.
"""
groups = []
if count == 0:
return [string]
if len(string) % count != 0:
raise ValueError(
'Modulus `{}` on string `{}` of length `{}` is not uniform.'.format(
count, string, len(string)))
else:
for k in range(0, len(string), count):
groups.append(string[k: k + count])
if DEBUG:
print_vars(['called via `make_groups`', groups])
return groups
def make_groups(string, count):
"""Make a set of groups with a string.
e.g. >>> make_groups('ABCDEFGH', 2) = [['AB', 'CD', 'EF', 'GH']]
Raises ValueError if modulus operation results in uneven group distribution.
"""
groups = []
if count == 0:
return [string]
if len(string) % count != 0:
raise ValueError(
'Modulus `{}` on string `{}` of length `{}` is not uniform.'.
format(count, string, len(string)))
else:
for k in range(0, len(string), count):
groups.append(string[k:k + count])
if DEBUG:
print_vars(['called via `make_groups`', groups])
return groups
def hex_to_bin(hexnum):
"""Convert hexadecimal to binary"""
binary = dec_to_bin(hex_to_dec(hexnum))
if DEBUG:
print_vars(['Hex to bin', binary])
return binary
def hex_to_bin(hexnum):
"""Convert hexadecimal to binary"""
binary = dec_to_bin(hex_to_dec(hexnum))
if DEBUG:
print_vars(['Hex to bin', binary])
return binary
