Module liba.crc8

8-bit Cyclic Redundancy Check

Functions

new (poly, reversed) constructor for 8-bit Cyclic Redundancy Check
gen (ctx, poly, reversed) generate for 8-bit Cyclic Redundancy Check
eval (ctx, block, value) calculate for 8-bit Cyclic Redundancy Check
pack (ctx, block, value) pack a block and its 8-bit Cyclic Redundancy Check value


Functions

new (poly, reversed)
constructor for 8-bit Cyclic Redundancy Check

Parameters:

  • poly integer polynomial that is CRC's divisor
  • reversed boolean whether or not to reverse

Returns:

    a.crc8 8-bit Cyclic Redundancy Check userdata
gen (ctx, poly, reversed)
generate for 8-bit Cyclic Redundancy Check

Parameters:

  • ctx a.crc8 8-bit Cyclic Redundancy Check userdata
  • poly integer polynomial that is CRC's divisor
  • reversed boolean whether or not to reverse

Returns:

    a.crc8 8-bit Cyclic Redundancy Check userdata
eval (ctx, block, value)
calculate for 8-bit Cyclic Redundancy Check

Parameters:

  • ctx a.crc8 8-bit Cyclic Redundancy Check userdata
  • block string block to be processed
  • value integer initial value

Returns:

    integer output value
pack (ctx, block, value)
pack a block and its 8-bit Cyclic Redundancy Check value

Parameters:

  • ctx a.crc8 8-bit Cyclic Redundancy Check userdata
  • block string block to be processed
  • value integer initial value

Returns:

    string packed block
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