Mercurial > hgrepos > Python > apps > py-cutils

annotate cutils/crcmod/python2/_crcfunpy.py @ 368:7761a15b9736

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author Franz Glasner <fzglas.hg@dom66.de>
date Thu, 10 Apr 2025 11:58:36 +0200
parents d038f0a9ba49
children
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d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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diff changeset
1 #-----------------------------------------------------------------------------
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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2 # Low level CRC functions for use by crcmod. This version is implemented in
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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3 # Python for a couple of reasons. 1) Provide a reference implememtation.
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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4 # 2) Provide a version that can be used on systems where a C compiler is not
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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5 # available for building extension modules.
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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6 #
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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7 # Copyright (c) 2004 Raymond L. Buvel
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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8 #
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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9 # Permission is hereby granted, free of charge, to any person obtaining a copy
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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10 # of this software and associated documentation files (the "Software"), to deal
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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11 # in the Software without restriction, including without limitation the rights
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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12 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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13 # copies of the Software, and to permit persons to whom the Software is
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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14 # furnished to do so, subject to the following conditions:
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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15 #
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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16 # The above copyright notice and this permission notice shall be included in
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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17 # all copies or substantial portions of the Software.
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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18 #
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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19 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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20 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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21 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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22 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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23 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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24 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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25 # SOFTWARE.
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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26 #-----------------------------------------------------------------------------
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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27
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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28 def _crc8(data, crc, table):
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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29 crc = crc & 0xFF
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30 for x in data:
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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31 crc = table[ord(x) ^ crc]
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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32 return crc
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33
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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34 def _crc8r(data, crc, table):
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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35 crc = crc & 0xFF
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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36 for x in data:
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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37 crc = table[ord(x) ^ crc]
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38 return crc
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39
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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40 def _crc16(data, crc, table):
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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41 crc = crc & 0xFFFF
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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42 for x in data:
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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43 crc = table[ord(x) ^ ((crc>>8) & 0xFF)] ^ ((crc << 8) & 0xFF00)
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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44 return crc
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45
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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46 def _crc16r(data, crc, table):
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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47 crc = crc & 0xFFFF
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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48 for x in data:
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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49 crc = table[ord(x) ^ (crc & 0xFF)] ^ (crc >> 8)
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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50 return crc
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51
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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52 def _crc24(data, crc, table):
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53 crc = crc & 0xFFFFFF
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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54 for x in data:
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55 crc = table[ord(x) ^ (int(crc>>16) & 0xFF)] ^ ((crc << 8) & 0xFFFF00)
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56 return crc
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57
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58 def _crc24r(data, crc, table):
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59 crc = crc & 0xFFFFFF
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60 for x in data:
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61 crc = table[ord(x) ^ int(crc & 0xFF)] ^ (crc >> 8)
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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62 return crc
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63
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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64 def _crc32(data, crc, table):
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65 crc = crc & 0xFFFFFFFFL
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66 for x in data:
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67 crc = table[ord(x) ^ (int(crc>>24) & 0xFF)] ^ ((crc << 8) & 0xFFFFFF00L)
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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68 return crc
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69
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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70 def _crc32r(data, crc, table):
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71 crc = crc & 0xFFFFFFFFL
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72 for x in data:
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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73 crc = table[ord(x) ^ int(crc & 0xFFL)] ^ (crc >> 8)
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74 return crc
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75
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76 def _crc64(data, crc, table):
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77 crc = crc & 0xFFFFFFFFFFFFFFFFL
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78 for x in data:
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79 crc = table[ord(x) ^ (int(crc>>56) & 0xFF)] ^ ((crc << 8) & 0xFFFFFFFFFFFFFF00L)
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80 return crc
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81
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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82 def _crc64r(data, crc, table):
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83 crc = crc & 0xFFFFFFFFFFFFFFFFL
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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84 for x in data:
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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85 crc = table[ord(x) ^ int(crc & 0xFFL)] ^ (crc >> 8)
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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86 return crc
d038f0a9ba49 Vendored crcmod2 into sub-package "cutils.crcmod" as pure-Python implementation of additional "digests": CRC sums.
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87