crc32c(data, crc::UInt32=0x00000000)

Compute the CRC-32c checksum of the givendata, which can be anArray{UInt8}, a contiguous subarray thereof, anAbstractVector{UInt8}, or aString. Optionally, you can pass a startingcrc integer to be mixed in with the checksum. Thecrc parameter can be used to compute a checksum on data divided into chunks: performingcrc32c(data2, crc32c(data1)) is equivalent to the checksum of[data1; data2]. (Technically, a little-endian checksum is computed.)

There is also a methodcrc32c(io, nb, crc) to checksumnb bytes from a streamio, orcrc32c(io, crc) to checksum all the remaining bytes. Hence you can doopen(crc32c, filename) to checksum an entire file, orcrc32c(seekstart(buf)) to checksum anIOBuffer without callingtake!.

For aString, note that the result is specific to the UTF-8 encoding (a different checksum would be obtained from a different Unicode encoding). To checksum ana::AbstractArray of some other bitstype without padding, you can docrc32c(vec(reinterpret(UInt8,a))), but note that the result may be endian-dependent.

crc32c(io::IO, [nb::Integer,] crc::UInt32=0x00000000)

Read up tonb bytes fromio and return the CRC-32c checksum, optionally mixed with a startingcrc integer. Ifnb is not supplied, thenio will be read until the end of the stream.