Tar.hdr.ck3: def of bend-kit-tar@0.3.0.0
Import: import bend-kit-tar@0.3.0.0/tar.bend as Tar
Lines 341-344 of bend-kit-tar@0.3.0.0/tar.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-tar@0.3.0.0/tar.bend&start_line=341&end_line=344

import Base
import bend-kit-bytes@0.3.3.0/bytes.bend as Bytes

# The checksum's eight bytes count as spaces.
def hdr.ck3(+len: U32, +i: U32, +sum: U32, +ck: U32, +ok: Bool, +x: U32, r: Array<U32> & U32) -> Bytes.Bytes & Maybe<&2, Hdr>:
  (a, +w) = r
  hdr.valid(ok && U32.is_eq(ck, (sum - x - wsum(w) + 256 : U32)), len, i, sum, a)

Uses (14):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Array
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Sigma
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_eq
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.sub
  https://jend.leeeet.dev/definition.txt?path=bend-kit-bytes@0.3.3.0/bytes.bend&name=Bytes
  https://jend.leeeet.dev/definition.txt?path=bend-kit-tar@0.3.0.0/tar.bend&name=Hdr
  https://jend.leeeet.dev/definition.txt?path=bend-kit-tar@0.3.0.0/tar.bend&name=hdr.valid
  https://jend.leeeet.dev/definition.txt?path=bend-kit-tar@0.3.0.0/tar.bend&name=wsum