use File::Basename;
use File::Find;
use File::Copy;
use File::Path;
use File::Spec;

$S = "\001";
#$S = ";";

#   @ # % * escapes...
#
sub p4_esc
{
  my ($path) = (@_);

  $path =~ s/%/%25/g;

  $path =~ s/^\@/\001/;
  $path =~ s/\@$/\001/;
  $path =~ s/\@\@/%40/g;
  $path =~ s/^\001/\@/;
  $path =~ s/\001$/\@/;

  $path =~ s/#/%23/g;
  $path =~ s/\*/%2a/g;

  return $path;
}


sub rmfiles
{
    my @files = @_;
    for $file (@files)
    {
        if (-d $file)
        {
            rmtree($file) || die("unable to rmtree $file: $!")
        }
        elsif (-e $file) 
        {
            unlink($file) || die("unable to remove $file: $!");
        }
    }
}


sub atq
{
  my ($s) = @_;
  $s =~ s/\@/\@\@/g;
  return "\@$s\@";
}


sub traverse
{
  local($dir, $lev, $onfile, $ondir, $onsymlink) = @_;
  
  local($dirent);
  local($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
       $atime,$mtime,$ctime,$blksize,$blocks);

  local($dirhandle) = "dh$lev";

  opendir($dirhandle, $dir);

  while (($dirent = readdir($dirhandle)))
    {
      if ($dirent eq "." || $dirent eq "..") { next; }
      ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
       $atime,$mtime,$ctime,$blksize,$blocks) = lstat("$dir/$dirent");
      typsw:
        {
          -f _ && do
            { 
	      if (defined(&$onfile)) { &$onfile("$dir", "$dirent"); }
              last typsw;
            } ;
          -d _ && do
            {
	      if (defined(&$ondir)) { &$ondir("$dir", "$dirent"); }
              do traverse("$dir/$dirent", $lev+1, $onfile, $ondir, $onsymlink);
              last typsw;
            } ;
          -l "$dir/$dirent" && do
            {
	      if (defined(&$onsymlink)) { &$onsymlink("$dir", "$dirent"); }
	      if ($SYM_SPECIAL && $lev == 0)
                { do traverse("$dir/$dirent", $lev+1, $onfile, $ondir, $onsymlink); }
              last typsw;
            } ;
        }
    }
  closedir($dirhandle);
}


sub oscall
{
  my ($cmd, $doit) = @_;
  my ($sts);

  if (! defined($doit)) { $doit = 1; }

  if (! $doit)
    {
      print "$Myname; $cmd\n";
      return;
    }

  print "$Myname> $cmd\n";

  if (($sts = system($cmd)) != 0)
    {
      my $sig = $sts & 0x0f;
      $sts = $sts >> 8;
      print ("$Myname: *** \"$cmd\" exited with signal $sig status $sts\n");
      return $sts;
    }
  return 0;
}

sub p4d_vers
{
  my ($P4D) = @_;
  my $v = `$P4D -V`;
  my ($y, $r) = ($v =~ m/\nRev. P4D\/[^\/]+\/(\d+)\.(\d+).*\//);

  if (! $v || ! $r)
    { print "$Myname: cannot recognize p4d version in:\n$v\n"; exit 1; }

  return ($y, $r);
}

my $cpfrom_base;
my $cpto_base;

sub cpfiles
{
    my $from_path = $_;
    $from_path =~ s@\\@/@g;
    next if $from_path eq $cpfrom_base;

    $from_path =~ s/^$cpfrom_base//;
    $to_path = "$cpto_base/$from_path";

    if (-d $_)
    {
        mkdir($to_path) || die("unable to mkdir $to_path: $!\n");
    }
    else
    {
        copy($_, $to_path) || die("unable to copy $_: $!\n");
    }
}

sub cptree
{
    my ($from, $to) = @_;
    $cpfrom_base = File::Spec->rel2abs($from);
    $cpfrom_base =~ s@\\@/@g;
    $cpto_base = File::Spec->rel2abs($to);
    $cpto_base =~ s@\\@/@g;
    mkdir($cpto_base) || die("unable to mkdir $cpto_base: $!\n");
    find({wanted =>\&cpfiles, no_chdir => 1 }, $cpfrom_base);
}

sub fixrcsfile
{
    return if (-d $_);

    print "Fixing $File::Find::name\n";
    open(FILE, $_) || die("unable to open $_ for reading: $!\n");
    @lines = <FILE>;
    close(FILE);

    $updated = 0;
    @newlines = ();
    for $line (@lines)
    {
        if ($line =~ /^date.+author %USERNAME%;/)
        {
            $line =~ s/%USERNAME%/$ENV{USERNAME}/;
        }
        if ($line !~ /^(deltatype|permissions|commitid|kopt|filename|owner|group)/)
        {
            push(@newlines, $line);
        }
    }

    if ($MSWIN)
    {
        oscall("attrib -R -H \"$_\"");
    }
    else
    {
        chmod 0700;
    }
    open(FILE, ">$_") || die("unable to open $_ for writing: $!\n");
    for $line (@newlines)
    {
        print FILE $line;
    }
    close(FILE);
    if ($MSWIN)
    {
        oscall("attrib +R \"$_\"");
    }
    else
    {
        chmod 0500;
    }
}

sub fixrcstree
{
    find(\&fixrcsfile, $_[0]);
}

1;