def delta_decode(binary_string):
length, encoded_bits = unary.decode(binary_string)
limit_offset = (length + 1) + length # encoding of the value itself, then 'value' number of bits to read
first_part, next_part = binary_string[:limit_offset], binary_string[limit_offset:] # we can now extract the first encoded binary
bits_to_decode = getvaluefrombinarystring(first_part) - 1
value = (1 << bits_to_decode) + getvaluefrombinarystring(next_part[:bits_to_decode])
consumed_bits = (length + 1) + length + bits_to_decode
return value, consumed_bits
def delta_decode(binary_string):
length, encoded_bits = unary.decode(binary_string)
limit_offset = (length + 1) + length # encoding of the value itself, then 'value' number of bits to read
first_part, next_part = binary_string[:limit_offset], binary_string[limit_offset:] # we can now extract the first encoded binary
bits_to_decode = getvaluefrombinarystring(first_part) - 1
value = (1 << bits_to_decode) + getvaluefrombinarystring(next_part[:bits_to_decode])
consumed_bits = (length + 1) + length + bits_to_decode
return value, consumed_bits
def gamma_decode(binary_string):
"""reads a gamma encoded value from the binary string, return the value and the number of consumed bits"""
# assert binary_string[0] == "0"
length, encoded_bits = unary.decode(binary_string)
offset = length + 1
remaining_bits = binary_string[offset: offset + length]
read_value = (1 << length ) + getvaluefrombinarystring(remaining_bits)
consumed_bits = length * 2 + 1
return read_value, consumed_bits
def gamma_decode(binary_string):
"""reads a gamma encoded value from the binary string, return the value and the number of consumed bits"""
# assert binary_string[0] == "0"
length, encoded_bits = unary.decode(binary_string)
offset = length + 1
remaining_bits = binary_string[offset:offset + length]
read_value = (1 << length) + getvaluefrombinarystring(remaining_bits)
consumed_bits = length * 2 + 1
return read_value, consumed_bits
#Kabopan - Readable Algorithms. Public Domain, 2007-2009
from kbp.univ.unary import encode, decode
assert encode(0) == "1"
assert encode(1) == "01"
assert encode(5) == "000001"
assert encode(5, False) == "111110"
assert decode("1") == (0, 1)
assert decode("000001") == (5, 6)
