#!/bin/awk -f
#
# Copyright © 2021 Nick Bowler
#
# Hackjob to try and find all the relevant wordlist items from the gperf
# output, in order to produce (at runtime) a list of those commands, in
# the same order as they are listed in the gperf input file.
#
# The output is a definition of the object-like macro CMD_SEQ, which
# can be used to initialize an array with static storage duration.
# Each element of the array represents offsets into the wordlist table,
# in sequence.
#
# License WTFPL2: Do What The Fuck You Want To Public License, version 2.
# This is free software: you are free to do what the fuck you want to.
# There is NO WARRANTY, to the extent permitted by law.

END {
  print "/*"
  if (FILENAME) {
    print " * Automatically generated by gen-cmdlist.awk from " FILENAME
  } else {
    print " * Automatically generated by gen-cmdlist.awk"
  }
  print " * Do not edit."
  print " */"
}

BEGIN { maxline = 0 }

$1 == "char" && (id = get_stringpool_id($2)) {
  sub(/[^"]*"/, "", $2)
  sub(/".*/, "", $2)
  pool[id] = $2
}

$1 ~ /^#line/ {
  line = $2
  if (line > maxline) {
    maxline = line
  }
}

(id = get_stringpool_id($0)) && $0 ~ "cmd_" pool[id] {
  sub(/^stringpool_str/, "", id)
  indices[line] = id
}

END {
  seq = ""
  for (i = 1; i <= maxline; i++) {
    if (i in indices) {
      if (seq) {
        seq = seq ", " indices[i]
      } else {
        seq = indices[i]
      }
    }
  }

  print "#define CMD_SEQ { " seq " }"
}

function get_stringpool_id(s)
{
  if (sub(/.*stringpool_str/, "stringpool_str", s) && sub(/[,[].*/, "", s)) {
    return s
  }

  return ""
}