import re

CRC_TABLE = (

0x0000, 0xCC01, 0xD801, 0x1400, 0xF001, 0x3C00, 0x2800, 0xE401,

0xA001, 0x6C00, 0x7800, 0xB401, 0x5000, 0x9C01, 0x8801, 0x4400,

)

def calc_crc(bytes, crc=0):

for byte in bytes:

if isinstance(byte, int):

byte_char = byte

else:

byte_char = ord(byte)

# Taken verbatim from FIT SDK docs

tmp = CRC_TABLE[crc & 0xF]

crc = (crc >> 4) & 0x0FFF

crc = crc ^ tmp ^ CRC_TABLE[byte_char & 0xF]

tmp = CRC_TABLE[crc & 0xF]

crc = (crc >> 4) & 0x0FFF

crc = crc ^ tmp ^ CRC_TABLE[(byte_char >> 4) & 0xF]

return crc

METHOD_NAME_SCRUBBER = re.compile(r'\W|^(?=\d)')

UNIT_NAME_TO_FUNC_REPLACEMENTS = (

('/', ' per '),

('%', 'percent'),

('*', ' times '),

)

def scrub_method_name(method_name, convert_units=False):

if convert_units:

for replace_from, replace_to in UNIT_NAME_TO_FUNC_REPLACEMENTS:

method_name = method_name.replace(

replace_from, '%s' % replace_to,

)

return METHOD_NAME_SCRUBBER.sub('_', method_name)