#!/bin/awk -f
#
# Copyright © 2021 Nick Bowler
#
# Generate a test for whether a particuar combination of type specifiers
# represents a valid type, for internal use by the declaration parser.
#
# 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-typemap.awk from " FILENAME
  } else {
    print " * Automatically generated by gen-typemap.awk"
  }
  print " * Do not edit."
  print " */"
}

BEGIN {
  OFS = "\n\t   | "
  count = 0
}

$0 ~ /^[abcdefghijklmnopqrstuvwxyz_]/ {
  long = 0
  for (i = 1; i <= NF; i++) {
    if ($i == "long") {
      if (long++) {
        $i = "llong"
      }
    }

    sub(/_/, "", $i)
    $i = "1ul<<(CDECL_TYPE_" toupper($i) "-CDECL_SPEC_TYPE)"
  }
  types[count++] = $0
}

END {
  print "static inline int typemap_is_valid(unsigned long map)\n{"
  print "\tswitch (map) {"

  for (i = 0; i < count; i++) {
    print "\tcase " types[i] ":"
  }

  print "\t\treturn 1;"
  print "\t}\n"
  print "\treturn 0;"
  print "}"
}