#!/bin/awk -f
#
# Copyright © 2021 Nick Bowler
#
# Generate a function to return the C keyword corresponding to a specifier
# type as a string, for internal use by the output routines.
#
# 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-specstr.awk from " FILENAME
  } else {
    print " * Automatically generated by gen-specstr.awk"
  }
  print " * Do not edit."
  print " */"
}

BEGIN {
  kinds["TYPE"] = kinds["STOR"] = kinds["QUAL"] = kinds["FUNC"] = 1
  underscore["BOOL"] = underscore["COMPLEX"] = underscore["IMAGINARY"] = 1
}

$1 ~ /^CDECL_/ {
  sub(/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ_].*/, "", $1)

  split($1, parts, "_")
  if (parts[2] in kinds) {
    if (parts[3] == "IDENT") {
      s = ""
    } else if (parts[3] in underscore) {
      s = "_" substr(parts[3], 1, 1) tolower(substr(parts[3], 2))
    } else {
      s = tolower(parts[3])
    }
    specs[$1] = s
  }
}

END {
  print "static inline const char *spec_string(unsigned type)\n{"
  print "\tswitch (type) {"

  for (s in specs) {
    print "\tcase " s ": return \"" specs[s] "\";"
  }

  print "\t}"
  print "\n\tassert(0);"
  print "}"
}