<h2>Editing File: /usr/bin/h2ph</h2><form method='post'><textarea name='content' class='file-edit'>#!/usr/bin/perl
    eval 'exec /usr/bin/perl -S $0 ${1+&quot;$@&quot;}'
	if $running_under_some_shell;

BEGIN { pop @INC if $INC[-1] eq '.' }

use strict;

use Config;
use File::Path qw(mkpath);
use Getopt::Std;

# Make sure read permissions for all are set:
if (defined umask &amp;&amp; (umask() &amp; 0444)) {
    umask (umask() &amp; ~0444);
}

getopts('Dd:rlhaQe');
use vars qw($opt_D $opt_d $opt_r $opt_l $opt_h $opt_a $opt_Q $opt_e);
die &quot;-r and -a options are mutually exclusive\n&quot; if ($opt_r and $opt_a);
my @inc_dirs = inc_dirs() if $opt_a;

my $Exit = 0;

my $Dest_dir = $opt_d || $Config{installsitearch};
die &quot;Destination directory $Dest_dir doesn't exist or isn't a directory\n&quot;
    unless -d $Dest_dir;

my @isatype = qw(
	char	uchar	u_char
	short	ushort	u_short
	int	uint	u_int
	long	ulong	u_long
	FILE	key_t	caddr_t
	float	double	size_t
);

my %isatype;
@isatype{@isatype} = (1) x @isatype;
my $inif = 0;
my %Is_converted;
my %bad_file = ();

@ARGV = ('-') unless @ARGV;

build_preamble_if_necessary();

sub reindent($) {
    my($text) = shift;
    $text =~ s/\n/\n    /g;
    $text =~ s/        /\t/g;
    $text;
}

my ($t, $tab, %curargs, $new, $eval_index, $dir, $name, $args, $outfile);
my ($incl, $incl_type, $incl_quote, $next);
while (defined (my $file = next_file())) {
    if (-l $file and -d $file) {
        link_if_possible($file) if ($opt_l);
        next;
    }

    # Recover from header files with unbalanced cpp directives
    $t = '';
    $tab = 0;

    # $eval_index goes into '#line' directives, to help locate syntax errors:
    $eval_index = 1;

    if ($file eq '-') {
	open(IN, &quot;-&quot;);
	open(OUT, &quot;&gt;-&quot;);
    } else {
	($outfile = $file) =~ s/\.h$/.ph/ || next;
	print &quot;$file -&gt; $outfile\n&quot; unless $opt_Q;
	if ($file =~ m|^(.*)/|) {
	    $dir = $1;
	    mkpath &quot;$Dest_dir/$dir&quot;;
	}

	if ($opt_a) { # automagic mode:  locate header file in @inc_dirs
	    foreach (@inc_dirs) {
		chdir $_;
		last if -f $file;
	    }
	}

	open(IN, &quot;&lt;&quot;, &quot;$file&quot;) || (($Exit = 1),(warn &quot;Can't open $file: $!\n&quot;),next);
	open(OUT, &quot;&gt;&quot;, &quot;$Dest_dir/$outfile&quot;) || die &quot;Can't create $outfile: $!\n&quot;;
    }

    print OUT
        &quot;require '_h2ph_pre.ph';\n\n&quot;,
        &quot;no warnings qw(redefine misc);\n\n&quot;;

    while (defined (local $_ = next_line($file))) {
	if (s/^\s*\#\s*//) {
	    if (s/^define\s+(\w+)//) {
		$name = $1;
		$new = '';
		s/\s+$//;
		s/\(\w+\s*\(\*\)\s*\(\w*\)\)\s*(-?\d+)/$1/; # (int (*)(foo_t))0
		if (s/^\(([\w,\s]*)\)//) {
		    $args = $1;
		    my $proto = '() ';
		    if ($args ne '') {
			$proto = '';
			foreach my $arg (split(/,\s*/,$args)) {
			    $arg =~ s/^\s*([^\s].*[^\s])\s*$/$1/;
			    $curargs{$arg} = 1;
			}
			$args =~ s/\b(\w)/\$$1/g;
			$args = &quot;my($args) = \@_;\n$t    &quot;;
		    }
		    s/^\s+//;
		    expr();
		    $new =~ s/([&quot;\\])/\\$1/g;       #&quot;]);
		    EMIT($proto);
		} else {
		    s/^\s+//;
		    expr();

		    $new = 1 if $new eq '';

		    # Shunt around such directives as '#define FOO FOO':
		    next if $new =~ /^\s*&amp;\Q$name\E\s*\z/;

		    $new = reindent($new);
		    $args = reindent($args);
		    $new =~ s/(['\\])/\\$1/g;        #']);

	    	    print OUT $t, 'eval ';
		    if ($opt_h) {
			print OUT &quot;\&quot;\\n#line $eval_index $outfile\\n\&quot; . &quot;;
			$eval_index++;
		    }
		    print OUT &quot;'sub $name () {$new;}' unless defined(&amp;$name);\n&quot;;
		}
	    } elsif (/^(include|import|include_next)\s*([&lt;\&quot;])(.*)[&gt;\&quot;]/) {
                $incl_type = $1;
                $incl_quote = $2;
                $incl = $3;
                if (($incl_type eq 'include_next') ||
                    ($opt_e &amp;&amp; exists($bad_file{$incl}))) {
                    $incl =~ s/\.h$/.ph/;
		print OUT ($t,
			   &quot;eval {\n&quot;);
                $tab += 4;
                $t = &quot;\t&quot; x ($tab / 8) . ' ' x ($tab % 8);
                    print OUT ($t, &quot;my(\@REM);\n&quot;);
                    if ($incl_type eq 'include_next') {
		print OUT ($t,
			   &quot;my(\%INCD) = map { \$INC{\$_} =&gt; 1 } &quot;,
			           &quot;(grep { \$_ eq \&quot;$incl\&quot; } &quot;,
                                   &quot;keys(\%INC));\n&quot;);
		print OUT ($t,
			           &quot;\@REM = map { \&quot;\$_/$incl\&quot; } &quot;,
			   &quot;(grep { not exists(\$INCD{\&quot;\$_/$incl\&quot;})&quot;,
			           &quot; and -f \&quot;\$_/$incl\&quot; } \@INC);\n&quot;);
                    } else {
                        print OUT ($t,
                                   &quot;\@REM = map { \&quot;\$_/$incl\&quot; } &quot;,
                                   &quot;(grep {-r \&quot;\$_/$incl\&quot; } \@INC);\n&quot;);
                    }
		print OUT ($t,
			   &quot;require \&quot;\$REM[0]\&quot; if \@REM;\n&quot;);
                $tab -= 4;
                $t = &quot;\t&quot; x ($tab / 8) . ' ' x ($tab % 8);
                print OUT ($t,
			   &quot;};\n&quot;);
		print OUT ($t,
			   &quot;warn(\$\@) if \$\@;\n&quot;);
                } else {
                    $incl =~ s/\.h$/.ph/;
                    # copy the prefix in the quote syntax (#include &quot;x.h&quot;) case
                    if ($incl !~ m|/| &amp;&amp; $incl_quote eq q{&quot;} &amp;&amp; $file =~ m|^(.*)/|) {
                        $incl = &quot;$1/$incl&quot;;
                    }
		    print OUT $t,&quot;require '$incl';\n&quot;;
                }
	    } elsif (/^ifdef\s+(\w+)/) {
		print OUT $t,&quot;if(defined(&amp;$1)) {\n&quot;;
		$tab += 4;
		$t = &quot;\t&quot; x ($tab / 8) . ' ' x ($tab % 8);
	    } elsif (/^ifndef\s+(\w+)/) {
		print OUT $t,&quot;unless(defined(&amp;$1)) {\n&quot;;
		$tab += 4;
		$t = &quot;\t&quot; x ($tab / 8) . ' ' x ($tab % 8);
	    } elsif (s/^if\s+//) {
		$new = '';
		$inif = 1;
		expr();
		$inif = 0;
		print OUT $t,&quot;if($new) {\n&quot;;
		$tab += 4;
		$t = &quot;\t&quot; x ($tab / 8) . ' ' x ($tab % 8);
	    } elsif (s/^elif\s+//) {
		$new = '';
		$inif = 1;
		expr();
		$inif = 0;
		$tab -= 4;
		$t = &quot;\t&quot; x ($tab / 8) . ' ' x ($tab % 8);
		print OUT $t,&quot;}\n elsif($new) {\n&quot;;
		$tab += 4;
		$t = &quot;\t&quot; x ($tab / 8) . ' ' x ($tab % 8);
	    } elsif (/^else/) {
		$tab -= 4;
		$t = &quot;\t&quot; x ($tab / 8) . ' ' x ($tab % 8);
		print OUT $t,&quot;} else {\n&quot;;
		$tab += 4;
		$t = &quot;\t&quot; x ($tab / 8) . ' ' x ($tab % 8);
	    } elsif (/^endif/) {
		$tab -= 4;
		$t = &quot;\t&quot; x ($tab / 8) . ' ' x ($tab % 8);
		print OUT $t,&quot;}\n&quot;;
	    } elsif(/^undef\s+(\w+)/) {
		print OUT $t, &quot;undef(&amp;$1) if defined(&amp;$1);\n&quot;;
	    } elsif(/^error\s+(&quot;.*&quot;)/) {
		print OUT $t, &quot;die($1);\n&quot;;
	    } elsif(/^error\s+(.*)/) {
		print OUT $t, &quot;die(\&quot;&quot;, quotemeta($1), &quot;\&quot;);\n&quot;;
	    } elsif(/^warning\s+(.*)/) {
		print OUT $t, &quot;warn(\&quot;&quot;, quotemeta($1), &quot;\&quot;);\n&quot;;
	    } elsif(/^ident\s+(.*)/) {
		print OUT $t, &quot;# $1\n&quot;;
	    }
	} elsif (/^\s*(typedef\s*)?enum\s*(\s+[a-zA-Z_]\w*\s*)?/) { # { for vi
	    until(/\{[^}]*\}.*;/ || /;/) {
		last unless defined ($next = next_line($file));
		chomp $next;
		# drop &quot;#define FOO FOO&quot; in enums
		$next =~ s/^\s*#\s*define\s+(\w+)\s+\1\s*$//;
		# #defines in enums (aliases)
		$next =~ s/^\s*#\s*define\s+(\w+)\s+(\w+)\s*$/$1 = $2,/;
		$_ .= $next;
		print OUT &quot;# $next\n&quot; if $opt_D;
	    }
	    s/#\s*if.*?#\s*endif//g; # drop #ifdefs
	    s@/\*.*?\*/@@g;
	    s/\s+/ /g;
	    next unless /^\s?(typedef\s?)?enum\s?([a-zA-Z_]\w*)?\s?\{(.*)\}\s?([a-zA-Z_]\w*)?\s?;/;
	    (my $enum_subs = $3) =~ s/\s//g;
	    my @enum_subs = split(/,/, $enum_subs);
	    my $enum_val = -1;
	    foreach my $enum (@enum_subs) {
		my ($enum_name, $enum_value) = $enum =~ /^([a-zA-Z_]\w*)(=.+)?$/;
		$enum_name or next;
		$enum_value =~ s/^=//;
		$enum_val = (length($enum_value) ? $enum_value : $enum_val + 1);
		if ($opt_h) {
		    print OUT ($t,
			       &quot;eval(\&quot;\\n#line $eval_index $outfile\\n&quot;,
			       &quot;sub $enum_name () \{ $enum_val; \}\&quot;) &quot;,
			       &quot;unless defined(\&amp;$enum_name);\n&quot;);
		    ++ $eval_index;
		} else {
		    print OUT ($t,
			       &quot;eval(\&quot;sub $enum_name () \{ $enum_val; \}\&quot;) &quot;,
			       &quot;unless defined(\&amp;$enum_name);\n&quot;);
		}
	    }
	} elsif (/^(?:__extension__\s+)?(?:extern|static)\s+(?:__)?inline(?:__)?\s+/
	    and !/;\s*$/ and !/{\s*}\s*$/)
	{ # { for vi
	    # This is a hack to parse the inline functions in the glibc headers.
	    # Warning: massive kludge ahead. We suppose inline functions
	    # are mainly constructed like macros.
	    while (1) {
		last unless defined ($next = next_line($file));
		chomp $next;
		undef $_, last if $next =~ /__THROW\s*;/
			       or $next =~ /^(__extension__|extern|static)\b/;
		$_ .= &quot; $next&quot;;
		print OUT &quot;# $next\n&quot; if $opt_D;
		last if $next =~ /^}|^{.*}\s*$/;
	    }
	    next if not defined; # because it's only a prototype
	    s/\b(__extension__|extern|static|(?:__)?inline(?:__)?)\b//g;
	    # violently drop #ifdefs
	    s/#\s*if.*?#\s*endif//g
		and print OUT &quot;# some #ifdef were dropped here -- fill in the blanks\n&quot;;
	    if (s/^(?:\w|\s|\*)*\s(\w+)\s*//) {
		$name = $1;
	    } else {
		warn &quot;name not found&quot;; next; # shouldn't occur...
	    }
	    my @args;
	    if (s/^\(([^()]*)\)\s*(\w+\s*)*//) {
		for my $arg (split /,/, $1) {
		    if ($arg =~ /(\w+)\s*$/) {
			$curargs{$1} = 1;
			push @args, $1;
		    }
		}
	    }
	    $args = (
		@args
		? &quot;my(&quot; . (join ',', map &quot;\$$_&quot;, @args) . &quot;) = \@_;\n$t    &quot;
		: &quot;&quot;
	    );
	    my $proto = @args ? '' : '() ';
	    $new = '';
	    s/\breturn\b//g; # &quot;return&quot; doesn't occur in macros usually...
	    expr();
	    # try to find and perlify local C variables
	    our @local_variables = (); # needs to be a our(): (?{...}) bug workaround
	    {
		use re &quot;eval&quot;;
		my $typelist = join '|', keys %isatype;
		$new =~ s['
		  (?:(?:__)?const(?:__)?\s+)?
		  (?:(?:un)?signed\s+)?
		  (?:long\s+)?
		  (?:$typelist)\s+
		  (\w+)
		  (?{ push @local_variables, $1 })
		  ']
		 [my \$$1]gx;
		$new =~ s['
		  (?:(?:__)?const(?:__)?\s+)?
		  (?:(?:un)?signed\s+)?
		  (?:long\s+)?
		  (?:$typelist)\s+
		  ' \s+ &amp;(\w+) \s* ;
		  (?{ push @local_variables, $1 })
		  ]
		 [my \$$1;]gx;
	     }
	    $new =~ s/&amp;$_\b/\$$_/g for @local_variables;
	    $new =~ s/([&quot;\\])/\\$1/g;       #&quot;]);
	    # now that's almost like a macro (we hope)
	    EMIT($proto);
	}
    }
    $Is_converted{$file} = 1;
    if ($opt_e &amp;&amp; exists($bad_file{$file})) {
        unlink($Dest_dir . '/' . $outfile);
        $next = '';
    } else {
        print OUT &quot;1;\n&quot;;
	queue_includes_from($file) if $opt_a;
    }
}

if ($opt_e &amp;&amp; (scalar(keys %bad_file) &gt; 0)) {
    warn &quot;Was unable to convert the following files:\n&quot;;
    warn &quot;\t&quot; . join(&quot;\n\t&quot;,sort(keys %bad_file)) . &quot;\n&quot;;
}

exit $Exit;

sub EMIT {
    my $proto = shift;

    $new = reindent($new);
    $args = reindent($args);
    if ($t ne '') {
    $new =~ s/(['\\])/\\$1/g;   #']);
    if ($opt_h) {
        print OUT $t,
                    &quot;eval \&quot;\\n#line $eval_index $outfile\\n\&quot; . 'sub $name $proto\{\n$t    ${args}eval q($new);\n$t}' unless defined(\&amp;$name);\n&quot;;
                    $eval_index++;
    } else {
        print OUT $t,
                    &quot;eval 'sub $name $proto\{\n$t    ${args}eval q($new);\n$t}' unless defined(\&amp;$name);\n&quot;;
    }
    } else {
              print OUT &quot;unless(defined(\&amp;$name)) {\n    sub $name $proto\{\n\t${args}eval q($new);\n    }\n}\n&quot;;
    }
    %curargs = ();
    return;
}

sub expr {
    if (/\b__asm__\b/) {	# freak out
	$new = '&quot;(assembly code)&quot;';
	return
    }
    my $joined_args;
    if(keys(%curargs)) {
	$joined_args = join('|', keys(%curargs));
    }
    while ($_ ne '') {
	s/^\&amp;\&amp;// &amp;&amp; do { $new .= &quot; &amp;&amp;&quot;; next;}; # handle &amp;&amp; operator
	s/^\&amp;([\(a-z\)]+)/$1/i;	# hack for things that take the address of
	s/^(\s+)//		&amp;&amp; do {$new .= ' '; next;};
	s/^0X([0-9A-F]+)[UL]*//i
	    &amp;&amp; do {my $hex = $1;
		   $hex =~ s/^0+//;
		   if (length $hex &gt; 8 &amp;&amp; !$Config{use64bitint}) {
		       # Croak if nv_preserves_uv_bits &lt; 64 ?
		       $new .=         hex(substr($hex, -8)) +
			       2**32 * hex(substr($hex,  0, -8));
		       # The above will produce &quot;erroneous&quot; code
		       # if the hex constant was e.g. inside UINT64_C
		       # macro, but then again, h2ph is an approximation.
		   } else {
		       $new .= lc(&quot;0x$hex&quot;);
		   }
		   next;};
	s/^(-?\d+\.\d+E[-+]?\d+)[FL]?//i	&amp;&amp; do {$new .= $1; next;};
	s/^(\d+)\s*[LU]*//i	&amp;&amp; do {$new .= $1; next;};
	s/^(&quot;(\\&quot;|[^&quot;])*&quot;)//	&amp;&amp; do {$new .= $1; next;};
	s/^'((\\&quot;|[^&quot;])*)'//	&amp;&amp; do {
	    if ($curargs{$1}) {
		$new .= &quot;ord('\$$1')&quot;;
	    } else {
		$new .= &quot;ord('$1')&quot;;
	    }
	    next;
	};
        # replace &quot;sizeof(foo)&quot; with &quot;{foo}&quot;
        # also, remove * (C dereference operator) to avoid perl syntax
        # problems.  Where the %sizeof array comes from is anyone's
        # guess (c2ph?), but this at least avoids fatal syntax errors.
        # Behavior is undefined if sizeof() delimiters are unbalanced.
        # This code was modified to able to handle constructs like this:
        #   sizeof(*(p)), which appear in the HP-UX 10.01 header files.
        s/^sizeof\s*\(// &amp;&amp; do {
            $new .= '$sizeof';
            my $lvl = 1;  # already saw one open paren
            # tack { on the front, and skip it in the loop
            $_ = &quot;{&quot; . &quot;$_&quot;;
            my $index = 1;
            # find balanced closing paren
            while ($index &lt;= length($_) &amp;&amp; $lvl &gt; 0) {
                $lvl++ if substr($_, $index, 1) eq &quot;(&quot;;
                $lvl-- if substr($_, $index, 1) eq &quot;)&quot;;
                $index++;
            }
            # tack } on the end, replacing )
            substr($_, $index - 1, 1) = &quot;}&quot;;
            # remove pesky * operators within the sizeof argument
            substr($_, 0, $index - 1) =~ s/\*//g;
            next;
        };
	# Eliminate typedefs
	/\(([\w\s]+)[\*\s]*\)\s*[\w\(]/ &amp;&amp; do {
	    my $doit = 1;
	    foreach (split /\s+/, $1) {  # Make sure all the words are types,
	        unless($isatype{$_} or $_ eq 'struct' or $_ eq 'union'){
		    $doit = 0;
		    last;
		}
	    }
	    if( $doit ){
		s/\([\w\s]+[\*\s]*\)// &amp;&amp; next;      # then eliminate them.
	    }
	};
	# struct/union member, including arrays:
	s/^([_A-Z]\w*(\[[^\]]+\])?((\.|-&gt;)[_A-Z]\w*(\[[^\]]+\])?)+)//i &amp;&amp; do {
	    my $id = $1;
	    $id =~ s/(\.|(-&gt;))([^\.\-]*)/-&gt;\{$3\}/g;
	    $id =~ s/\b([^\$])($joined_args)/$1\$$2/g if length($joined_args);
	    while($id =~ /\[\s*([^\$\&amp;\d\]]+)\]/) {
		my($index) = $1;
		$index =~ s/\s//g;
		if(exists($curargs{$index})) {
		    $index = &quot;\$$index&quot;;
		} else {
		    $index = &quot;&amp;$index&quot;;
		}
		$id =~ s/\[\s*([^\$\&amp;\d\]]+)\]/[$index]/;
	    }
	    $new .= &quot; (\$$id)&quot;;
	};
	s/^([_a-zA-Z]\w*)//	&amp;&amp; do {
	    my $id = $1;
	    if ($id eq 'struct' || $id eq 'union') {
		s/^\s+(\w+)//;
		$id .= ' ' . $1;
		$isatype{$id} = 1;
	    } elsif ($id =~ /^((un)?signed)|(long)|(short)$/) {
		while (s/^\s+(\w+)//) { $id .= ' ' . $1; }
		$isatype{$id} = 1;
	    }
	    if ($curargs{$id}) {
		$new .= &quot;\$$id&quot;;
		$new .= '-&gt;' if /^[\[\{]/;
	    } elsif ($id eq 'defined') {
		$new .= 'defined';
	    } elsif (/^\s*\(/) {
		s/^\s*\((\w),/(&quot;$1&quot;,/ if $id =~ /^_IO[WR]*$/i;	# cheat
		$new .= &quot; &amp;$id&quot;;
	    } elsif ($isatype{$id}) {
		if ($new =~ /\{\s*$/) {
		    $new .= &quot;'$id'&quot;;
		} elsif ($new =~ /\(\s*$/ &amp;&amp; /^[\s*]*\)/) {
		    $new =~ s/\(\s*$//;
		    s/^[\s*]*\)//;
		} else {
		    $new .= q(').$id.q(');
		}
	    } else {
		if ($inif) {
		    if ($new =~ /defined\s*$/) {
			$new .= '(&amp;' . $id . ')';
		    } elsif ($new =~ /defined\s*\($/) {
			$new .= '&amp;' . $id;
		    } else {
			$new .= '(defined(&amp;' . $id . ') ? &amp;' . $id . ' : undef)';
		    }
		} elsif (/^\[/) {
		    $new .= &quot; \$$id&quot;;
		} else {
		    $new .= ' &amp;' . $id;
		}
	    }
	    next;
	};
	s/^(.)// &amp;&amp; do { if ($1 ne '#') { $new .= $1; } next;};
    }
}


sub next_line
{
    my $file = shift;
    my ($in, $out);
    my $pre_sub_tri_graphs = 1;

    READ: while (not eof IN) {
        $in  .= &lt;IN&gt;;
        chomp $in;
        next unless length $in;

        while (length $in) {
            if ($pre_sub_tri_graphs) {
                # Preprocess all tri-graphs
                # including things stuck in quoted string constants.
                $in =~ s/\?\?=/#/g;                         # | ??=|  #|
                $in =~ s/\?\?\!/|/g;                        # | ??!|  ||
                $in =~ s/\?\?'/^/g;                         # | ??'|  ^|
                $in =~ s/\?\?\(/[/g;                        # | ??(|  [|
                $in =~ s/\?\?\)/]/g;                        # | ??)|  ]|
                $in =~ s/\?\?\-/~/g;                        # | ??-|  ~|
                $in =~ s/\?\?\//\\/g;                       # | ??/|  \|
                $in =~ s/\?\?&lt;/{/g;                         # | ??&lt;|  {|
                $in =~ s/\?\?&gt;/}/g;                         # | ??&gt;|  }|
            }
	    if ($in =~ /^\#ifdef __LANGUAGE_PASCAL__/) {
		# Tru64 disassembler.h evilness: mixed C and Pascal.
		while (&lt;IN&gt;) {
		    last if /^\#endif/;
		}
		$in = &quot;&quot;;
		next READ;
	    }
	    if ($in =~ /^extern inline / &amp;&amp; # Inlined assembler.
		$^O eq 'linux' &amp;&amp; $file =~ m!(?:^|/)asm/[^/]+\.h$!) {
		while (&lt;IN&gt;) {
		    last if /^}/;
		}
		$in = &quot;&quot;;
		next READ;
	    }
            if ($in =~ s/\\$//) {                           # \-newline
                $out    .= ' ';
                next READ;
            } elsif ($in =~ s/^([^&quot;'\\\/]+)//) {            # Passthrough
                $out    .= $1;
            } elsif ($in =~ s/^(\\.)//) {                   # \...
                $out    .= $1;
            } elsif ($in =~ /^'/) {                         # '...
                if ($in =~ s/^('(\\.|[^'\\])*')//) {
                    $out    .= $1;
                } else {
                    next READ;
                }
            } elsif ($in =~ /^&quot;/) {                         # &quot;...
                if ($in =~ s/^(&quot;(\\.|[^&quot;\\])*&quot;)//) {
                    $out    .= $1;
                } else {
                    next READ;
                }
            } elsif ($in =~ s/^\/\/.*//) {                  # //...
                # fall through
            } elsif ($in =~ m/^\/\*/) {                     # /*...
                # C comment removal adapted from perlfaq6:
                if ($in =~ s/^\/\*[^*]*\*+([^\/*][^*]*\*+)*\///) {
                    $out    .= ' ';
                } else {                                    # Incomplete /* */
                    next READ;
                }
            } elsif ($in =~ s/^(\/)//) {                    # /...
                $out    .= $1;
            } elsif ($in =~ s/^([^\'\&quot;\\\/]+)//) {
                $out    .= $1;
            } elsif ($^O eq 'linux' &amp;&amp;
                     $file =~ m!(?:^|/)linux/byteorder/pdp_endian\.h$! &amp;&amp;
                     $in   =~ s!\'T KNOW!!) {
                $out    =~ s!I DON$!I_DO_NOT_KNOW!;
            } else {
                if ($opt_e) {
                    warn &quot;Cannot parse $file:\n$in\n&quot;;
                    $bad_file{$file} = 1;
                    $in = '';
                    $out = undef;
                    last READ;
                } else {
		die &quot;Cannot parse:\n$in\n&quot;;
                }
            }
        }

        last READ if $out =~ /\S/;
    }

    return $out;
}


# Handle recursive subdirectories without getting a grotesquely big stack.
# Could this be implemented using File::Find?
sub next_file
{
    my $file;

    while (@ARGV) {
        $file = shift @ARGV;

        if ($file eq '-' or -f $file or -l $file) {
            return $file;
        } elsif (-d $file) {
            if ($opt_r) {
                expand_glob($file);
            } else {
                print STDERR &quot;Skipping directory '$file'\n&quot;;
            }
        } elsif ($opt_a) {
            return $file;
        } else {
            print STDERR &quot;Skipping '$file':  not a file or directory\n&quot;;
        }
    }

    return undef;
}


# Put all the files in $directory into @ARGV for processing.
sub expand_glob
{
    my ($directory)  = @_;

    $directory =~ s:/$::;

    opendir DIR, $directory;
        foreach (readdir DIR) {
            next if ($_ eq '.' or $_ eq '..');

            # expand_glob() is going to be called until $ARGV[0] isn't a
            # directory; so push directories, and unshift everything else.
            if (-d &quot;$directory/$_&quot;) { push    @ARGV, &quot;$directory/$_&quot; }
            else                    { unshift @ARGV, &quot;$directory/$_&quot; }
        }
    closedir DIR;
}


# Given $file, a symbolic link to a directory in the C include directory,
# make an equivalent symbolic link in $Dest_dir, if we can figure out how.
# Otherwise, just duplicate the file or directory.
sub link_if_possible
{
    my ($dirlink)  = @_;
    my $target  = eval 'readlink($dirlink)';

    if ($target =~ m:^\.\./: or $target =~ m:^/:) {
        # The target of a parent or absolute link could leave the $Dest_dir
        # hierarchy, so let's put all of the contents of $dirlink (actually,
        # the contents of $target) into @ARGV; as a side effect down the
        # line, $dirlink will get created as an _actual_ directory.
        expand_glob($dirlink);
    } else {
        if (-l &quot;$Dest_dir/$dirlink&quot;) {
            unlink &quot;$Dest_dir/$dirlink&quot; or
                print STDERR &quot;Could not remove link $Dest_dir/$dirlink:  $!\n&quot;;
        }

        if (eval 'symlink($target, &quot;$Dest_dir/$dirlink&quot;)') {
            print &quot;Linking $target -&gt; $Dest_dir/$dirlink\n&quot;;

            # Make sure that the link _links_ to something:
            if (! -e &quot;$Dest_dir/$target&quot;) {
                mkpath(&quot;$Dest_dir/$target&quot;, 0755) or
                    print STDERR &quot;Could not create $Dest_dir/$target/\n&quot;;
            }
        } else {
            print STDERR &quot;Could not symlink $target -&gt; $Dest_dir/$dirlink:  $!\n&quot;;
        }
    }
}


# Push all #included files in $file onto our stack, except for STDIN
# and files we've already processed.
sub queue_includes_from
{
    my ($file)    = @_;
    my $line;

    return if ($file eq &quot;-&quot;);

    open HEADER, &quot;&lt;&quot;, $file or return;
        while (defined($line = &lt;HEADER&gt;)) {
            while (/\\$/) { # Handle continuation lines
                chop $line;
                $line .= &lt;HEADER&gt;;
            }

            if ($line =~ /^#\s*include\s+([&lt;&quot;])(.*?)[&gt;&quot;]/) {
                my ($delimiter, $new_file) = ($1, $2);
                # copy the prefix in the quote syntax (#include &quot;x.h&quot;) case
                if ($delimiter eq q{&quot;} &amp;&amp; $file =~ m|^(.*)/|) {
                    $new_file = &quot;$1/$new_file&quot;;
                }
                push(@ARGV, $new_file) unless $Is_converted{$new_file};
            }
        }
    close HEADER;
}


# Determine include directories; $Config{usrinc} should be enough for (all
# non-GCC?) C compilers, but gcc uses additional include directories.
sub inc_dirs
{
    my $from_gcc   = `LC_ALL=C $Config{cc} -v -E - &lt; /dev/null 2&gt;&amp;1 | awk '/^#include/, /^End of search list/' | grep '^ '`;
    length($from_gcc) ? (split(' ', $from_gcc), $Config{usrinc}) : ($Config{usrinc});
}


# Create &quot;_h2ph_pre.ph&quot;, if it doesn't exist or was built by a different
# version of h2ph.
sub build_preamble_if_necessary
{
    # Increment $VERSION every time this function is modified:
    my $VERSION     = 4;
    my $preamble    = &quot;$Dest_dir/_h2ph_pre.ph&quot;;

    # Can we skip building the preamble file?
    if (-r $preamble) {
        # Extract version number from first line of preamble:
        open  PREAMBLE, &quot;&lt;&quot;, $preamble or die &quot;Cannot open $preamble:  $!&quot;;
            my $line = &lt;PREAMBLE&gt;;
            $line =~ /(\b\d+\b)/;
        close PREAMBLE            or die &quot;Cannot close $preamble:  $!&quot;;

        # Don't build preamble if a compatible preamble exists:
        return if $1 == $VERSION;
    }

    my (%define) = _extract_cc_defines();

    open  PREAMBLE, &quot;&gt;&quot;, $preamble or die &quot;Cannot open $preamble:  $!&quot;;
	print PREAMBLE &quot;# This file was created by h2ph version $VERSION\n&quot;;
        # Prevent non-portable hex constants from warning.
        #
        # We still produce an overflow warning if we can't represent
        # a hex constant as an integer.
        print PREAMBLE &quot;no warnings qw(portable);\n&quot;;

	foreach (sort keys %define) {
	    if ($opt_D) {
		print PREAMBLE &quot;# $_=$define{$_}\n&quot;;
	    }
	    if ($define{$_} =~ /^\((.*)\)$/) {
		# parenthesized value:  d=(v)
		$define{$_} = $1;
	    }
	    if (/^(\w+)\((\w)\)$/) {
		my($macro, $arg) = ($1, $2);
		my $def = $define{$_};
		$def =~ s/$arg/\$\{$arg\}/g;
		print PREAMBLE &lt;&lt;DEFINE;
unless (defined &amp;$macro) { sub $macro(\$) { my (\$$arg) = \@_; \&quot;$def\&quot; } }

DEFINE
	    } elsif
		($define{$_} =~ /^([+-]?(\d+)?\.\d+([eE][+-]?\d+)?)[FL]?$/) {
		# float:
		print PREAMBLE
		    &quot;unless (defined &amp;$_) { sub $_() { $1 } }\n\n&quot;;
	    } elsif ($define{$_} =~ /^([+-]?\d+)U?L{0,2}$/i) {
		# integer:
		print PREAMBLE
		    &quot;unless (defined &amp;$_) { sub $_() { $1 } }\n\n&quot;;
            } elsif ($define{$_} =~ /^([+-]?0x[\da-f]+)U?L{0,2}$/i) {
                # hex integer
                # Special cased, since perl warns on hex integers
                # that can't be represented in a UV.
                #
                # This way we get the warning at time of use, so the user
                # only gets the warning if they happen to use this
                # platform-specific definition.
                my $code = $1;
                $code = &quot;hex('$code')&quot; if length $code &gt; 10;
                print PREAMBLE
                    &quot;unless (defined &amp;$_) { sub $_() { $code } }\n\n&quot;;
	    } elsif ($define{$_} =~ /^\w+$/) {
		my $def = $define{$_};
		if ($isatype{$def}) {
		  print PREAMBLE
		    &quot;unless (defined &amp;$_) { sub $_() { \&quot;$def\&quot; } }\n\n&quot;;
		} else {
		  print PREAMBLE
		    &quot;unless (defined &amp;$_) { sub $_() { &amp;$def } }\n\n&quot;;
	        }
	    } else {
		print PREAMBLE
		    &quot;unless (defined &amp;$_) { sub $_() { \&quot;&quot;,
		    quotemeta($define{$_}), &quot;\&quot; } }\n\n&quot;;
	    }
	}
	print PREAMBLE &quot;\n1;\n&quot;;  # avoid 'did not return a true value' when empty
    close PREAMBLE               or die &quot;Cannot close $preamble:  $!&quot;;
}


# %Config contains information on macros that are pre-defined by the
# system's compiler.  We need this information to make the .ph files
# function with perl as the .h files do with cc.
sub _extract_cc_defines
{
    my %define;
    my $allsymbols  = join &quot; &quot;,
	@Config{'ccsymbols', 'cppsymbols', 'cppccsymbols'};

    # If optimizing -O2 is used, add the definition
    if ($Config{'ccflags'} =~ /(?:\s+|^)-O([\d]+)(?:\s+|$)/) {
	$allsymbols .= &quot; __OPTIMIZE__=$1&quot;;
    }

    # Split compiler pre-definitions into 'key=value' pairs:
    while ($allsymbols =~ /([^\s]+)=((\\\s|[^\s])+)/g) {
	$define{$1} = $2;
	if ($opt_D) {
	    print STDERR &quot;$_:  $1 -&gt; $2\n&quot;;
	}
    }

    return %define;
}


1;

##############################################################################
__END__

=head1 NAME

h2ph - convert .h C header files to .ph Perl header files

=head1 SYNOPSIS

B&lt;h2ph [-d destination directory] [-r | -a] [-l] [-h] [-e] [-D] [-Q]
[headerfiles]&gt;

=head1 DESCRIPTION

I&lt;h2ph&gt;
converts any C header files specified to the corresponding Perl header file
format.
It is most easily run while in /usr/include:

	cd /usr/include; h2ph * sys/*

or

	cd /usr/include; h2ph * sys/* arpa/* netinet/*

or

	cd /usr/include; h2ph -r -l .

The output files are placed in the hierarchy rooted at Perl's
architecture dependent library directory.  You can specify a different
hierarchy with a B&lt;-d&gt; switch.

If run with no arguments, filters standard input to standard output.

=head1 OPTIONS

=over 4

=item -d destination_dir

Put the resulting B&lt;.ph&gt; files beneath B&lt;destination_dir&gt;, instead of
beneath the default Perl library location (C&lt;$Config{'installsitearch'}&gt;).

=item -r

Run recursively; if any of B&lt;headerfiles&gt; are directories, then run I&lt;h2ph&gt;
on all files in those directories (and their subdirectories, etc.).  B&lt;-r&gt;
and B&lt;-a&gt; are mutually exclusive.

=item -a

Run automagically; convert B&lt;headerfiles&gt;, as well as any B&lt;.h&gt; files
which they include.  This option will search for B&lt;.h&gt; files in all
directories which your C compiler ordinarily uses.  B&lt;-a&gt; and B&lt;-r&gt; are
mutually exclusive.

=item -l

Symbolic links will be replicated in the destination directory.  If B&lt;-l&gt;
is not specified, then links are skipped over.

=item -h

Put 'hints' in the .ph files which will help in locating problems with
I&lt;h2ph&gt;.  In those cases when you B&lt;require&gt; a B&lt;.ph&gt; file containing syntax
errors, instead of the cryptic

	[ some error condition ] at (eval mmm) line nnn

you will see the slightly more helpful

	[ some error condition ] at filename.ph line nnn

However, the B&lt;.ph&gt; files almost double in size when built using B&lt;-h&gt;.

=item -e

If an error is encountered during conversion, output file will be removed and
a warning emitted instead of terminating the conversion immediately.

=item -D

Include the code from the B&lt;.h&gt; file as a comment in the B&lt;.ph&gt; file.
This is primarily used for debugging I&lt;h2ph&gt;.

=item -Q

'Quiet' mode; don't print out the names of the files being converted.

=back

=head1 ENVIRONMENT

No environment variables are used.

=head1 FILES

 /usr/include/*.h
 /usr/include/sys/*.h

etc.

=head1 AUTHOR

Larry Wall

=head1 SEE ALSO

perl(1)

=head1 DIAGNOSTICS

The usual warnings if it can't read or write the files involved.

=head1 BUGS

Doesn't construct the %sizeof array for you.

It doesn't handle all C constructs, but it does attempt to isolate
definitions inside evals so that you can get at the definitions
that it can translate.

It's only intended as a rough tool.
You may need to dicker with the files produced.

You have to run this program by hand; it's not run as part of the Perl
installation.

Doesn't handle complicated expressions built piecemeal, a la:

    enum {
	FIRST_VALUE,
	SECOND_VALUE,
    #ifdef ABC
	THIRD_VALUE
    #endif
    };

Doesn't necessarily locate all of your C compiler's internally-defined
symbols.

=cut

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