#!perl 

use strict;

use warnings;

use File::Basename;

use File::Copy;

use File::Path;

my $name = shift || 'PerlLog';

# get the version from the message file

open(my $msgfh, '<', "$name.mc") or die "fatal: Can't read file '$name.mc': $!\n";

my $top = <$msgfh>;

close($msgfh);

my ($version) = $top =~ /Sys::Syslog Message File (\d+\.\d+\.\d+)/

        or die "error: File '$name.mc' doesn't have a version number\n";

# compile the message text files

system("mc -d $name.mc");

system("rc $name.rc");

system(qq{ link -nodefaultlib -incremental:no -release /nologo -base:0x60000000 }

      .qq{ -comment:"Perl Syslog Message File v$version" }

      .qq{ -machine:i386 -dll -noentry -out:$name.dll $name.res }); 

# uuencode the resource file

open(my $rsrc, '<', "$name.RES") or die "fatal: Can't read resource file '$name.RES': $!";

binmode($rsrc);

my $uudata = pack "u", do { local $/; <$rsrc> };

close($rsrc);

open(my $uufh, '>', "$name\_RES.uu") or die "fatal: Can't write file '$name\_RES.uu': $!";

print $uufh $uudata;

close($uufh);

# uuencode the DLL

open(my $dll, '<', "$name.dll") or die "fatal: Can't read DLL '$name.dll': $!";

binmode($dll);

$uudata = pack "u", do { local $/; <$dll> };

close($dll);

open($uufh, '>', "$name\_dll.uu") or die "fatal: Can't write file '$name\_dll.uu': $!";

print $uufh $uudata;

close($uufh);

# parse the generated header to extract the constants

open(my $header, '<', "$name.h") or die "fatal: Can't read header file '$name.h': $!";

my %vals;    

my $max = 0;

while (<$header>) {

    if (/^#define\s+(\w+)\s+(\d+)$/ || /^#define\s+(\w+)\s+\(\(DWORD\)(\d+)L\)/) {

        $vals{$1} = $2;

        if (substr($1, 0, 1) eq 'C') {

            $max = $2 if $max < $2;

        }

    }

}

close($header);

my ($hash, $f2c, %fac);

for my $name (sort { substr($a,0,1) cmp substr($b,0,1) || $vals{$a} <=> $vals{$b} } keys %vals) {

    $hash .= "    $name => $vals{$name},\n" ;

    if ($name =~ /^CAT_(\w+)$/) {

        $fac{$1} = $vals{$name};

    }

}

for my $name (sort {$fac{$a} <=> $fac{$b}} keys %fac) {

    $f2c .= "    Sys::Syslog::LOG_$name() => '$name',\n";

}    

# write the Sys::Syslog::Win32 module

open my $out, '>', "Win32.pm" or die "fatal: Can't write Win32.pm: $!";

my $template = join '', <DATA>;

$template =~ s/__CONSTANT__/$hash/;

$template =~ s/__F2C__/$f2c/;

$template =~ s/__NAME_VER__/$name/;

$template =~ s/__VER__/$version/;

$max = sprintf "0x%08x", $max;

$template =~ s/__MAX__/'$max'/g;

$template =~ s/__TIME__/localtime()/ge;

print $out $template;

close $out;

print "Updated Win32.pm and relevant message files\n";

__END__

package Sys::Syslog::Win32;

use strict;

use warnings;

use Carp;

use File::Spec;

# === WARNING === WARNING === WARNING === WARNING === WARNING === WARNING ===

#

# This file was generated by Sys-Syslog/win32/compile.pl on __TIME__

# Any changes being made here will be lost the next time Sys::Syslog 

# is installed. 

#

# Do NOT USE THIS MODULE DIRECTLY: this is a utility module for Sys::Syslog.

# It may change at any time to fit the needs of Sys::Syslog therefore no 

# warranty is made WRT to its API. You Have Been Warned.

#

# === WARNING === WARNING === WARNING === WARNING === WARNING === WARNING ===

our $Source;

my $logger;

my $Registry;

use Win32::EventLog;

use Win32::TieRegistry 0.20 (

    TiedRef     => \$Registry,

    Delimiter   => "/",

    ArrayValues => 1,

    SplitMultis => 1,

    AllowLoad   => 1,

    qw(

        REG_SZ

        REG_EXPAND_SZ

        REG_DWORD

        REG_BINARY

        REG_MULTI_SZ

        KEY_READ

        KEY_WRITE

        KEY_ALL_ACCESS

    ),

);    

my $is_Cygwin = $^O =~ /Cygwin/i;

my $is_Win32  = $^O =~ /Win32/i;

my %const = (

__CONSTANT__

);

my %id2name = (

__F2C__

);

my @priority2eventtype = (

    EVENTLOG_ERROR_TYPE(),       # LOG_EMERG

    EVENTLOG_ERROR_TYPE(),       # LOG_ALERT

    EVENTLOG_ERROR_TYPE(),       # LOG_CRIT

    EVENTLOG_ERROR_TYPE(),       # LOG_ERR

    EVENTLOG_WARNING_TYPE(),     # LOG_WARNING

    EVENTLOG_WARNING_TYPE(),     # LOG_NOTICE

    EVENTLOG_INFORMATION_TYPE(), # LOG_INFO

    EVENTLOG_INFORMATION_TYPE(), # LOG_DEBUG

);

# 

# _install()

# --------

# Used to set up a connection to the eventlog.

# 

sub _install {

    return $logger if $logger;

    # can't just use basename($0) here because Win32 path often are a 

    # a mix of / and \, and File::Basename::fileparse() can't handle that, 

    # while File::Spec::splitpath() can.. Go figure..

    my (undef, undef, $basename) = File::Spec->splitpath($0);

    ($Source) ||= $basename;

    $Source.=" [SSW:__VER__]";

    #$Registry->Delimiter("/"); # is this needed?

    my $root = 'LMachine/SYSTEM/CurrentControlSet/Services/Eventlog/Application/';

    my $dll  = 'Sys/Syslog/__NAME_VER__.dll';

    if (!$Registry->{$root.$Source} || 

        !$Registry->{$root.$Source.'/CategoryMessageFile'}[0] ||

        !-e $Registry->{$root.$Source.'/CategoryMessageFile'}[0] ) 

    {

        # find the resource DLL, which should be along Syslog.dll

        my ($file) = grep { -e $_ }  map { ("$_/$dll" => "$_/auto/$dll") }  @INC;

        $dll = $file if $file;

        # on Cygwin, convert the Unix path into absolute Windows path

        if ($is_Cygwin) {

            if ($] > 5.009005) {

                chomp($file = Cygwin::posix_to_win_path($file, 1));

            }

            else {

                local $ENV{PATH} = '';

                chomp($dll = `/usr/bin/cygpath --absolute --windows "$dll"`);

            }

        }

        $dll =~ s![\\/]+!\\!g;     # must be backslashes!

        die "fatal: Can't find resource DLL for Sys::Syslog\n" if !$dll;

        $Registry->{$root.$Source} = {

            '/EventMessageFile'    => [ $dll, REG_EXPAND_SZ ],

            '/CategoryMessageFile' => [ $dll, REG_EXPAND_SZ ],

            '/CategoryCount'       => [ __MAX__, REG_DWORD ],

            #'/TypesSupported'      => [ __MAX__, REG_DWORD ],

        };

        warn "Configured eventlog to use $dll for $Source\n" if $Sys::Syslog::DEBUG;

    }

    #Carp::confess("Registry has the wrong value for '$Source', possibly mismatched dll!\nMine:$dll\nGot :$Registry->{$root.$Source.'/CategoryMessageFile'}[0]\n")

    #    if $Registry->{$root.$Source.'/CategoryMessageFile'}[0] ne $dll;

    # we really should do something useful with this but for now

    # we set it to "" to prevent Win32::EventLog from warning

    my $host = "";

    $logger = Win32::EventLog->new($Source, $host) 

        or Carp::confess("Failed to connect to the '$Source' event log");

    return $logger;

}

# 

# _syslog_send()

# ------------

# Used to convert syslog messages into eventlog messages

# 

sub _syslog_send {

    my ($buf, $numpri, $numfac) = @_;

    $numpri ||= EVENTLOG_INFORMATION_TYPE();

    $numfac ||= Sys::Syslog::LOG_USER();

    my $name = $id2name{$numfac};

    my $opts = {

        EventType   => $priority2eventtype[$numpri], 

        EventID     => $const{"MSG_$name"},

        Category    => $const{"CAT_$name"}, 

        Strings     => "$buf\0", 

        Data        => "",

    };

    if ($Sys::Syslog::DEBUG) {

        require Data::Dumper;

        warn Data::Dumper->Dump(

            [$numpri, $numfac, $name, $opts], 

            [qw(numpri numfac name opts)]

        );

    }

    return $logger->Report($opts);

}

=head1 NAME

Sys::Syslog::Win32 - Win32 support for Sys::Syslog

=head1 DESCRIPTION

This module is a back-end plugin for C<Sys::Syslog>, for supporting the Win32 

event log. It is not expected to be directly used by any module other than 

C<Sys::Syslog> therefore it's API may change at any time and no warranty is 

made with regards to backward compatibility. You Have Been Warned. 

In order to execute this script and compile the Win32 support files, you

need some helper programs: mc.exe, rc.exe and link.exe

mc.exe and rc.exe can be downloaded from

http://www.microsoft.com/en-us/download/details.aspx?id=11310

link.exe is usually shipped with Visual Studio.

=head1 SEE ALSO

L<Sys::Syslog>

=head1 AUTHORS

SE<eacute>bastien Aperghis-Tramoni and Yves Orton

=head1 LICENSE

This program is free software; you can redistribute it and/or modify it

under the same terms as Perl itself.

=cut

1;