Untitled

import streams, strutils

let f = newFileStream("blake2b-kat.txt", fmRead)
if not isNil(f):
  defer: close(f)

  var input, key, hash: string
  var readLine: TaintedString = newString(1024)
  var line: string
  var idx: int = 0
  while f.readLine(readLine):
    line = readLine.strip()
    if len(line) < 1:
      idx = 0
    else:
      case idx
      of 0:
        if line[0..2] == "in:":
          input = line[4..^0]
          inc(idx)
        else:
          echo "First line did not start with 'in:'!"
          idx = 0
      of 1:
        if line[0..3] == "key:":
          key = line[5..^0]
          inc(idx)
        else:
          echo "Second line did not start with 'key:'!"
          idx = 0
      of 2:
        if line[0..4] == "hash:":
          hash = line[5..^0]
          echo "Input: ", input, "; Key: ", key, "; Hash: ", hash, "\n"
          idx = 0
        else:
          echo "Third line did not start with 'hash:'!"
          idx = 0
      else:
        echo "Hit invalid index"
        idx = 0