Module modsum 

A simple modular sum over bytes (i.e. bytes.sum() % modulus)

There are a number of parameters:

• width: The number of bits in the sum type, at most 64
• modulus: The sum is taken modulo this number
• init: The initial number
• check: The checksum of “123456789” (optional, gets checked at construction)
• name: An optional name that gets used for display purposes

Note that a parameter to add at the end is not needed, since it is equivalent to init.

Structs

ModSum

A Modsum checksum algorithm.

ModSumBuilder

A builder to set the various parameters for the modsum algorithm.

Functions

reverse_modsum

Find the parameters of a modsum algorithm.