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#!/bin/awk -f
# TRAINFUCK: CHOO CHOO MUTHAFUCKA -*- awk -*-
# Author: Case Duckworth <acdw@acdw.net>
# License: WTFPL
# Version: #9
#
# LANGUAGE
# trainfuck is not case-sensitive
# -- except for ALL ABOARD and END OF THE LINE
# ignore everything before ALL ABOARD
# ignore everything after END OF THE LINE
# (this means you can comment between these)
# bf tf
# + chug
# - chugga
# > choo
# < choo choo
# . click OR clickety
# , clack
# [ tickets please
# ] your ticket please
# syntax does NOT WRAP across line breaks
# anything else is an error and DERAILS the train
BEGIN {
aboard = 0
}
/^ALL ABOARD$/ {
aboard = 1
next
}
/^END OF THE LINE$/ {
aboard = 0
next
}
aboard {
gsub(/[[:space:]]/, "", $0)
print proc(toupper($0))
}
END {
if (DERAIL_ERR) {
print DERAIL_ERR
exit 9
}
}
function derail(err)
{
print "TRAIN DERAILED at input line", FNR
DERAIL_ERR = err
exit
}
function proc(t)
{
if (! match(t, /CHUGGA|CHUG|CHOO|CLICK|CLICKETY|CLACK|TICKETSPLEASE|YOURTICKETPLEASE|$/)) {
derail("WTF")
}
pre = substr(t, 1, RSTART - 1)
tok = substr(t, RSTART, RLENGTH)
pst = substr(t, RSTART + RLENGTH)
if (tok == "CHUGGA") { # needs to be first
tok = "-"
return (pre tok proc(pst))
}
if (tok == "CHUG") {
tok = "+"
return (pre tok proc(pst))
}
if (tok == "CHOO") {
if (substr(pst, 1, 4) == "CHOO") {
tok = "<"
sub(/CHOO/, "", pst)
} else {
tok = ">"
}
return (pre tok proc(pst))
}
if (tok == "CLICK" || tok == "CLICKETY") {
tok = "."
return (pre tok proc(pst))
}
if (tok == "CLACK") {
tok = ","
return (pre tok proc(pst))
}
if (tok == "TICKETSPLEASE") {
tok = "["
return (pre tok proc(pst))
}
if (tok == "YOURTICKETPLEASE") {
tok = "]"
return (pre tok proc(pst))
}
}
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