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BSD 4.3

#	TRIM(1)
#
#	Trim lines
#
#	Ralph E. Griswold
#
#	Last modified 7/10/83
#

procedure main(x)
   local n, i, pad, s, line
   n := 80
   pad := 0
   i := 0
   while i < *x do {
      s := x[i +:= 1] | break
      if s == "-f" then pad := 1
      else if not(n := (0 <= integer(s))) then stop("usage: trim [n] [-f]")
      }
   while line := read() do {
      line := line[1+:n]
      line := trim(line)
      if pad = 1 then line := left(line,n)
      write(line)
      }
end

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