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File: //usr/share/zsh/functions/Completion/Unix/_base64
#compdef base64 gbase64 base32 gbase32

# Note: This does NOT cover `uuencode`/`uudecode`, which on some BSD systems
# have the aliases `b64encode`/`b64decode` — those are sufficiently different
# that they belong in another function. It DOES cover GNU's `base32`, since it
# is essentially the same program as their `base64`.

local variant type=base${service//[^2346]/}

_pick_variant -r variant \
  gnu='Free Soft' fourmilab=fourmi darwin=-D unix --version

case $variant in
  gnu)
    _arguments -s -S : \
      '(: -)--help[display help information]' \
      '(: -)--version[display version information]' \
      + dec \
      '(enc -d --decode)'{-d,--decode}"[decode input from $type]" \
      '(enc -i --ignore-garbage)'{-i,--ignore-garbage}'[ignore irrelevant characters when decoding]' \
      + '(enc)' \
      '(dec)'{-w+,--wrap=}'[wrap encoded lines at specified number of columns]:number of columns' \
      + in \
      '1:input file:_files'
    return
    ;;
  darwin)
    _arguments -s -S : \
      '(: -)'{-h,--help}'[display help information]' \
      + '(dec)' \
      '(enc)'{-D,--decode}"[decode input from $type]" \
      + '(enc)' \
      '(dec)'{-b+,--break=}'[wrap encoded lines at specified number of columns]:number of columns' \
      + '(out)' \
      {-o+,--output=}'[specify output file]:output file:_files' \
      + '(in)' \
      {-i+,--input=}'[specify input file]:input file:_files' \
      '1:input file:_files'
    return
    ;;
  fourmilab)
    _arguments -s -S : \
      '(: -)--copyright[display copyright information]' \
      '(: -)'{-u,--help}'[display help information]' \
      '(: -)--version[display version information]' \
      + dec \
      '(enc -d --decode)'{-d,--decode}"[decode input from $type]" \
      '(enc -n --noerrcheck)'{-n,--noerrcheck}'[ignore errors when decoding]' \
      + '(enc)' \
      '(dec)'{-e,--encode}"[encode input to $type]" \
      + io \
      '1:input file:_files' \
      '2:output file:_files'
    return
    ;;
esac

# A few other implementations exist, though they are rarely encountered
_default