#!/usr/bin/perl -w
######################################################################
#
# Copyright 2010-2012 by Wilson Snyder.  This package is free software; you
# can redistribute it and/or modify it under the terms of either the GNU
# Lesser General Public License Version 3 or the Perl Artistic License
# Version 2.0.
#
# 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 more details.
#
######################################################################

# DESCRIPTION: Diff Verilator includes against SystemPerl include files

use Getopt::Long;
use IO::File;
use strict;

our $Debug;
our $Bad;

if (! GetOptions (
	  #"help"	=> \&usage,
	  "debug"	=> sub { $Debug = 1; },
    )) {
    die "usage();"
}

diff("$ARGV[0]/include/verilated_vcd_c.h",	"$ARGV[1]/src/SpTraceVcdC.h");
diff("$ARGV[0]/include/verilated_vcd_sc.h",	"$ARGV[1]/src/SpTraceVcd.h");
diff("$ARGV[0]/include/verilated_vcd_c.cpp",	"$ARGV[1]/src/SpTraceVcdC.cpp");
diff("$ARGV[0]/include/verilated_vcd_sc.cpp",	"$ARGV[1]/src/SpTraceVcd.cpp");

exit(10) if $Bad;

sub diff {
    my $a=shift;
    my $b=shift;

    my $ta = "/tmp/spdiff.$$.a";
    my $tb = "/tmp/spdiff.$$.b";

    prep($a,$ta);
    prep($b,$tb);

    system("diff -u -w $ta $tb");
}

sub prep {
    my $filename = shift;
    my $wfilename = shift;

    my $sp;
    if ($filename =~ m!src/Sp!) {
	$sp = "Sp";
    } elsif ($filename =~ m!include/verilated!) {
    } else {
	die "%Error: Not sure if Sp/Verilated: $filename,\n";
    }

    my $fh = IO::File->new("<$filename") or die "%Error: $! $filename";
    my $fho = IO::File->new(">$wfilename") or die "%Error: $! writing $wfilename";

    my @wf;
    my $off;
    while (defined(my $line = $fh->getline)) {
	if ($line =~ m!// *SPDIFF_OFF!) {
	    $off = 1;
	    next;
	} elsif ($line =~ m!// *SPDIFF_ON!) {
	    $off = 0;
	    next;
	}
	next if $off;

	next if $line =~ /compile-command:/;
	$line =~ s/SP_ABORT.*// if $sp;
	$line =~ s/SP_NOTICE.*// if $sp;
	$line =~ s/vl_fatal.*// if !$sp;
	$line =~ s/VL_PRINT.*// if !$sp;
	$line =~ s/Copyright \d+-\d+/Copyright #-#/g;

	push @wf, $line;

	my $check = $line;
	$check =~ s/\bspace//i;
	$check =~ s/\bsplit//i;
	$check =~ s/"SP_TRACE"//;

	if ($sp && $check =~ /Verilat/i
	    && $check !~ /and newer/) {
	    warn "%Warning: $filename:$.: Verilator text in Sp version: $line";
	    $Bad = 1;
	} elsif (!$sp && $check =~ /\b(Sp|SP)/
		 ) {
	    warn "%Warning: $filename:$.: Sp text in Verilator version: $line";
	    $Bad = 1;
	} elsif (!$sp && $check =~ /\<uint[0-9]+_t/) {
	    warn "%Warning: $filename:$.: uint in Verilator version: $line";
	    $Bad = 1;
	}
    }
    !$off or die "%Error: $filename: SPDIFF_OFF block never terminated\n";

    my $wholefile = join('',@wf);

    if ($sp) {
	$wholefile =~ s/SPTRACEVCDC_VERSION/VERILATED_VCD_VERSION/g;
	$wholefile =~ s/SPTRACEVCDC_/VERILATED_VCD_C_/g;
	$wholefile =~ s/SPTRACEVCD_TEST/VERILATED_VCD_TEST/g;
	$wholefile =~ s/SPTRACEVCD_/VERILATED_VCD_SC_/g;

	#
	$wholefile =~ s/\bSpTraceFile\b/VerilatedVcdSc/g;
	$wholefile =~ s/\bSpTraceFileC\b/VerilatedVcdC/g;
	$wholefile =~ s/\bSpTraceVcd\b/VerilatedVcd/g;
	$wholefile =~ s/\bSpTraceVcdCFile\b/VerilatedVcdC/g;
	#
	$wholefile =~ s/\bSpTraceCallInfo\b/VerilatedVcdCallInfo/g;
	$wholefile =~ s/\bSpTraceCallback_t/VerilatedVcdCallback_t/g;
	$wholefile =~ s/\bSpTraceVcd_/VerilatedVcd_/g;
	$wholefile =~ s/\bSpTraceVcdSig\b/VerilatedVcdSig/g;
	$wholefile =~ s/\bSpScBvExposer/VlScBvExposer/g;
	#
	$wholefile =~ s/\b(uint[0-9]+_t)/vl$1/g;
	$wholefile =~ s/%ll/%" VL_PRI64 "/g;
	$wholefile =~ s/\(long long unsigned\)n/ n/g;  # printQuad
	#
	$wholefile =~ s/\bSP_SC_BV/VL_SC_BV/g;
	$wholefile =~ s/\bSP_UNLIKELY/VL_UNLIKELY/g;
    }

    $fho->print($wholefile);
}

# Local Variables:
# compile-command: "./spdiff $SYP $V4"
# End: