#!/usr/bin/perl -w
# $Id: xilinx_tsim_xon 985 2018-01-03 08:59:40Z mueller $
#
# Copyright 2010- by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
#
# This program is free software; you may redistribute and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation, either version 3, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY, without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# for complete details.
#
#  Revision History:
# Date         Rev Version  Comment
# 2010-05-06   289   1.0    Initial version
#
#
# Add "XON => false," defs in X_FF and X_SFF instances when name of the
# instance is matched by a regexp found in a descriptor file.
#
# Logic:
#   looks for lines like
#      <name> : X_FF
#        generic map(
#   and adds
#      XON => false,   -- added by xilinx_tsim_xon tool --
#   if <name> is matched by a regexp found in file stem..tsim_xon_dat
#
#   all old 'XON => false' lines in input file are removed first, so this
#   tool can be rerun with changing desciptor files.
#

use strict;

my $stem = shift;

if (not defined $stem) {
  print "xilinx_tsim_xon-E: call with file stem\n";
  exit 1;
}

my $file_vhd = $stem . "_tsim.vhd";
my $file_dsc = $stem . ".tsim_xon_dat";

if (! -r $file_vhd) {
  print "xilinx_tsim_xon-E: $file_vhd not found or readable\n";
  exit 1;
}
if (! -r $file_dsc) {
  print "xilinx_tsim_xon-E: $file_dsc not found or readable\n";
  exit 1;
}

my @dsc_list;
open(DFILE, "<$file_dsc") || die ("Can't open descriptor file $file_dsc: $!");
while (<DFILE>) {
  chomp;
  s/^\s*//;
  s/\s*$//;
  next if m/^#/;
  next if m/^$/;
  push @dsc_list, $_;
}
close(DFILE);

my $file_tmp = $stem . "_tsim_new.vhd";
open(OFILE, ">$file_tmp")  || die ("Can't open output file $file_tmp: $!");
open(IFILE, "<$file_vhd")  || die ("Can't open input file $file_vhd: $!");

my $match_1 = 0;
my $name_1;

while (<IFILE>) {
  my $line = $_;
  next if m/-- added by xilinx_tsim_xon tool --$/;
  print OFILE $line;
  my $match = 0;
  my $name;
  if ($line =~ m/\s*([a-zA-Z0-9_]+)\s*:\s*(X_FF|X_SFF)/) {
    $name = $1;
    foreach my $pat (@dsc_list) {
      $match = 1 if ($name =~ m/^$pat$/);
    }
  }
  if ($match_1 && $line =~ m/generic map/) {
    ## print "xilinx_tsim_xon-I: XON=>false for $name_1\n";
    print OFILE 
      "      XON => false,      -- added by xilinx_tsim_xon tool --\n";
  }
  $match_1 = $match;
  $name_1 = $name;
}

close(IFILE);
close(OFILE);

rename $file_tmp, $file_vhd or die  ("Can't rename $file_tmp: $!");