# keyed_args.ludic - a key's arguments as the decoder reads them: unescaped, looked up while still English, a count

# an argument as it was handed in: each 27 before a 27 or a 31 taken off, outside a bracket only (a
# bracketed line inside it was carried raw, and its own escapes are its own)
@alloc_ok("a key made into text (a cache miss): an argument that held a key with holes")
function kr_unescape(s: string) -> string {
  var esc = false
  for i in 0 .. len(s) { if s[i] == I18N_ESC { esc = true } }
  if not esc { return s }
  let buf = buffer(len(s))
  var n = 0
  var d = 0
  var i = 0
  while i < len(s) {
    d = kx_depth(d, s[i])
    if d == 0 and s[i] == I18N_ESC and i + 1 < len(s) { i += 1 }
    buf[n] = s[i]
    n += 1
    i += 1
  }
  return text_of(buf, n)
}

# a count written as decimal digits (a leading - allowed); anything else is 0
function kr_int(s: string) -> int {
  var v = 0
  var neg = false
  for i in 0 .. len(s) {
    if i == 0 and s[i] == 45 { neg = true } else if s[i] >= 48 and s[i] <= 57 { v = v * 10 + (s[i] - 48) }
  }
  if neg { return -v }
  return v
}