ppphbin

source of perl for linux application,

      }
      else {
        diag("Uses $func");
      }
    }
    $warnings += hint($func);
  }

  unless ($opt{quiet}) {
    for $func (sort keys %{$file{uses_todo}}) {
      print "*** WARNING: Uses $func, which may not be portable below perl ",
            format_version($API{$func}{todo}), ", even with '$ppport'\n";
      $warnings++;
    }
  }

  for $func (sort keys %{$file{needed_static}}) {
    my $message = '';
    if (not exists $file{uses}{$func}) {
      $message = "No need to define NEED_$func if $func is never used";
    }
    elsif (exists $file{needs}{$func} && $file{needs}{$func} ne 'static') {
      $message = "No need to define NEED_$func when already needed globally";
    }
    if ($message) {
      diag($message);
      $file{changes} += ($c =~ s/^$HS*#$HS*define$HS+NEED_$func\b.*$LF//mg);
    }
  }

  for $func (sort keys %{$file{needed_global}}) {
    my $message = '';
    if (not exists $global{uses}{$func}) {
      $message = "No need to define NEED_${func}_GLOBAL if $func is never used";
    }
    elsif (exists $file{needs}{$func}) {
      if ($file{needs}{$func} eq 'extern') {
        $message = "No need to define NEED_${func}_GLOBAL when already needed globally";
      }
      elsif ($file{needs}{$func} eq 'static') {
        $message = "No need to define NEED_${func}_GLOBAL when only used in this file";
      }
    }
    if ($message) {
      diag($message);
      $file{changes} += ($c =~ s/^$HS*#$HS*define$HS+NEED_${func}_GLOBAL\b.*$LF//mg);
    }
  }

  $file{needs_inc_ppport} = keys %{$file{uses}};

  if ($file{needs_inc_ppport}) {
    my $pp = '';

    for $func (sort keys %{$file{needs}}) {
      my $type = $file{needs}{$func};
      next if $type eq 'extern';
      my $suffix = $type eq 'global' ? '_GLOBAL' : '';
      unless (exists $file{"needed_$type"}{$func}) {
        if ($type eq 'global') {
          diag("Files [@{$global{needs}{$func}}] need $func, adding global request");
        }
        else {
          diag("File needs $func, adding static request");
        }
        $pp .= "#define NEED_$func$suffix\n";
      }
    }

    if ($pp && ($c =~ s/^(?=$HS*#$HS*define$HS+NEED_\w+)/$pp/m)) {
      $pp = '';
      $file{changes}++;
    }

    unless ($file{has_inc_ppport}) {
      diag("Needs to include '$ppport'");
      $pp .= qq(#include "$ppport"\n)
    }

    if ($pp) {
      $file{changes} += ($c =~ s/^($HS*#$HS*define$HS+NEED_\w+.*?)^/$1$pp/ms)
                     || ($c =~ s/^(?=$HS*#$HS*include.*\Q$ppport\E)/$pp/m)
                     || ($c =~ s/^($HS*#$HS*include.*XSUB.*\s*?)^/$1$pp/m)
                     || ($c =~ s/^/$pp/);
    }
  }
  else {
    if ($file{has_inc_ppport}) {
      diag("No need to include '$ppport'");
      $file{changes} += ($c =~ s/^$HS*?#$HS*include.*\Q$ppport\E.*?$LF//m);
    }
  }

  # put back in our C comments
  my $ix;
  my $cppc = 0;
  my @ccom = @{$file{ccom}};
  for $ix (0 .. $#ccom) {
    if (!$opt{cplusplus} && $ccom[$ix] =~ s!^//!!) {
      $cppc++;
      $file{changes} += $c =~ s/$rccs$ix$rcce/$ccs$ccom[$ix] $cce/;
    }
    else {
      $c =~ s/$rccs$ix$rcce/$ccom[$ix]/;
    }
  }

  if ($cppc) {
    my $s = $cppc != 1 ? 's' : '';
    warning("Uses $cppc C++ style comment$s, which is not portable");
  }

  my $s = $warnings != 1 ? 's' : '';
  my $warn = $warnings ? " ($warnings warning$s)" : '';
  info("Analysis completed$warn");

  if ($file{changes}) {
    if (exists $opt{copy}) {
      my $newfile = "$filename$opt{copy}";
      if (-e $newfile) {
        error("'$newfile' already exists, refusing to write copy of '$filename'");
      }
      else {
        local *F;
        if (open F, ">$newfile") {
          info("Writing copy of '$filename' with changes to '$newfile'");
          print F $c;
          close F;
        }
        else {
          error("Cannot open '$newfile' for writing: $!");
        }
      }
    }
    elsif (exists $opt{patch} || $opt{changes}) {
      if (exists $opt{patch}) {
        unless ($patch_opened) {
          if (open PATCH, ">$opt{patch}") {
            $patch_opened = 1;
          }
          else {
            error("Cannot open '$opt{patch}' for writing: $!");
            delete $opt{patch};
            $opt{changes} = 1;
            goto fallback;
          }
        }
        mydiff(\*PATCH, $filename, $c);
      }
      else {
fallback:
        info("Suggested changes:");
        mydiff(\*STDOUT, $filename, $c);
      }
    }
    else {
      my $s = $file{changes} == 1 ? '' : 's';
      info("$file{changes} potentially required change$s detected");
    }
  }
  else {
    info("Looks good");
  }
}

close PATCH if $patch_opened;

exit 0;

#######################################################################

sub try_use { eval "use @_;"; return $@ eq '' }

sub mydiff
{
  local *F = shift;
  my($file, $str) = @_;
  my $diff;

  if (exists $opt{diff}) {
    $diff = run_diff($opt{diff}, $file, $str);
  }

  if (!defined $diff and try_use('Text::Diff')) {
    $diff = Text::Diff::diff($file, \$str, { STYLE => 'Unified' });
    $diff = <<HEADER . $diff;
--- $file
+++ $file.patched
HEADER
  }

  if (!defined $diff) {
    $diff = run_diff('diff -u', $file, $str);
  }

  if (!defined $diff) {
    $diff = run_diff('diff', $file, $str);
  }

  if (!defined $diff) {
    error("Cannot generate a diff. Please install Text::Diff or use --copy.");
    return;
  }

  print F $diff;
}

sub run_diff
{
  my($prog, $file, $str) = @_;
  my $tmp = 'dppptemp';
  my $suf = 'aaa';
  my $diff = '';
  local *F;

  while (-e "$tmp.$suf") { $suf++ }
  $tmp = "$tmp.$suf";

  if (open F, ">$tmp") {
    print F $str;
    close F;

    if (open F, "$prog $file $tmp |") {
      while (<F>) {
        s/\Q$tmp\E/$file.patched/;
        $diff .= $_;
      }
      close F;
      unlink $tmp;
      return $diff;
    }

    unlink $tmp;
  }
  else {
    error("Cannot open '$tmp' for writing: $!");
  }

  return undef;
}

sub rec_depend
{
  my($func, $seen) = @_;
  return () unless exists $depends{$func};
  $seen = {%{$seen||{}}};
  return () if $seen->{$func}++;
  my %s;
  grep !$s{$_}++, map { ($_, rec_depend($_, $seen)) } @{$depends{$func}};
}

sub parse_version
{
  my $ver = shift;

  if ($ver =~ /^(\d+)\.(\d+)\.(\d+)$/) {
    return ($1, $2, $3);
  }
  elsif ($ver !~ /^\d+\.[\d_]+$/) {
    die "cannot parse version '$ver'\n";
  }

  $ver =~ s/_//g;
  $ver =~ s/$/000000/;

  my($r,$v,$s) = $ver =~ /(\d+)\.(\d{3})(\d{3})/;

  $v = int $v;
  $s = int $s;

  if ($r < 5 || ($r == 5 && $v < 6)) {
    if ($s % 10) {
      die "cannot parse version '$ver'\n";
    }
  }

  return ($r, $v, $s);
}

sub format_version
{
  my $ver = shift;

  $ver =~ s/$/000000/;
  my($r,$v,$s) = $ver =~ /(\d+)\.(\d{3})(\d{3})/;

  $v = int $v;
  $s = int $s;

  if ($r < 5 || ($r == 5 && $v < 6)) {
    if ($s % 10) {
      die "invalid version '$ver'\n";
    }
    $s /= 10;

    $ver = sprintf "%d.%03d", $r, $v;
    $s > 0 and $ver .= sprintf "_%02d", $s;

    return $ver;
  }

  return sprintf "%d.%d.%d", $r, $v, $s;
}

sub info
{
  $opt{quiet} and return;
  print @_, "\n";
}

sub diag
{
  $opt{quiet} and return;
  $opt{diag} and print @_, "\n";
}

sub warning
{
  $opt{quiet} and return;
  print "*** ", @_, "\n";
}

sub error
{
  print "*** ERROR: ", @_, "\n";
}

my %given_hints;
my %given_warnings;
sub hint
{
  $opt{quiet} and return;
  my $func = shift;
  my $rv = 0;
  if (exists $warnings{$func} && !$given_warnings{$func}++) {
    my $warn = $warnings{$func};
    $warn =~ s!^!*** !mg;
    print "*** WARNING: $func\n", $warn;
    $rv++;
  }
  if ($opt{hints} && exists $hints{$func} && !$given_hints{$func}++) {
    my $hint = $hints{$func};
    $hint =~ s/^/   /mg;
    print "   --- hint for $func ---\n", $hint;
  }
  $rv;
}

sub usage
{
  my($usage) = do { local(@ARGV,$/)=($0); <> } =~ /^=head\d$HS+SYNOPSIS\s*^(.*?)\s*^=/ms;
  my %M = ( 'I' => '*' );
  $usage =~ s/^\s*perl\s+\S+/$^X $0/;
  $usage =~ s/([A-Z])<([^>]+)>/$M{$1}$2$M{$1}/g;

  print <<ENDUSAGE;

Usage: $usage

See perldoc $0 for details.

ENDUSAGE

  exit 2;
}

sub strip
{
  my $self = do { local(@ARGV,$/)=($0); <> };
  my($copy) = $self =~ /^=head\d\s+COPYRIGHT\s*^(.*?)^=\w+/ms;
  $copy =~ s/^(?=\S+)/    /gms;
  $self =~ s/^$HS+Do NOT edit.*?(?=^-)/$copy/ms;
  $self =~ s/^SKIP.*(?=^__DATA__)/SKIP
if (\@ARGV && \$ARGV[0] eq '--unstrip') {
  eval { require Devel::PPPort };
  \$@ and die "Cannot require Devel::PPPort, please install.\\n";
  if (\$Devel::PPPort::VERSION < $VERSION) {
    die "$0 was originally generated with Devel::PPPort $VERSION.\\n"
      . "Your Devel::PPPort is only version \$Devel::PPPort::VERSION.\\n"
      . "Please install a newer version, or --unstrip will not work.\\n";
  }
  Devel::PPPort::WriteFile(\$0);
  exit 0;
}
print <<END;

Sorry, but this is a stripped version of \$0.

To be able to use its original script and doc functionality,
please try to regenerate this file using:

  \$^X \$0 --unstrip

END
/ms;
  my($pl, $c) = $self =~ /(.*^__DATA__)(.*)/ms;
  $c =~ s{
    / (?: \*[^*]*\*+(?:[^$ccs][^*]*\*+)* / | /[^\r\n]*)
  | ( "[^"\\]*(?:\\.[^"\\]*)*"
    | '[^'\\]*(?:\\.[^'\\]*)*' )
  | ($HS+) }{ defined $2 ? ' ' : ($1 || '') }gsex;
  $c =~ s!\s+$!!mg;
  $c =~ s!^$LF!!mg;
  $c =~ s!^\s*#\s*!#!mg;
  $c =~ s!^\s+!!mg;

  open OUT, ">$0" or die "cannot strip $0: $!\n";
  print OUT "$pl$c\n";

  exit 0;
}