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+#!/usr/local/bin/perl
+
+use Config;
+use File::Basename qw(&basename &dirname);
+
+# List explicitly here the variables you want Configure to
+# generate. Metaconfig only looks for shell variables, so you
+# have to mention them as if they were shell variables, not
+# %Config entries. Thus you write
+# $startperl
+# to ensure Configure will look for $Config{startperl}.
+# Wanted: $archlibexp
+
+# This forces PL files to create target in same directory as PL file.
+# This is so that make depend always knows where to find PL derivatives.
+chdir(dirname($0));
+($file = basename($0)) =~ s/\.PL$//;
+$file =~ s/\.pl$//
+ if ($Config{'osname'} eq 'VMS' or
+ $Config{'osname'} eq 'OS2'); # "case-forgiving"
+
+open OUT,">$file" or die "Can't create $file: $!";
+
+print "Extracting $file (with variable substitutions)\n";
+
+# In this section, perl variables will be expanded during extraction.
+# You can use $Config{...} to use Configure variables.
+
+print OUT <<"!GROK!THIS!";
+$Config{'startperl'}
+ eval 'exec perl -S \$0 "\$@"'
+ if 0;
+
+'di ';
+'ds 00 \"';
+'ig 00 ';
+
+\$perlincl = $Config{archlibexp};
+
+!GROK!THIS!
+
+# In the following, perl variables are not expanded during extraction.
+
+print OUT <<'!NO!SUBS!';
+
+chdir '/usr/include' || die "Can't cd /usr/include";
+
+@isatype = split(' ',<<END);
+ char uchar u_char
+ short ushort u_short
+ int uint u_int
+ long ulong u_long
+ FILE
+END
+
+@isatype{@isatype} = (1) x @isatype;
+$inif = 0;
+
+@ARGV = ('-') unless @ARGV;
+
+foreach $file (@ARGV) {
+ if ($file eq '-') {
+ open(IN, "-");
+ open(OUT, ">-");
+ }
+ else {
+ ($outfile = $file) =~ s/\.h$/.ph/ || next;
+ print "$file -> $outfile\n";
+ if ($file =~ m|^(.*)/|) {
+ $dir = $1;
+ if (!-d "$perlincl/$dir") {
+ mkdir("$perlincl/$dir",0777);
+ }
+ }
+ open(IN,"$file") || ((warn "Can't open $file: $!\n"),next);
+ open(OUT,">$perlincl/$outfile") || die "Can't create $outfile: $!\n";
+ }
+ while (<IN>) {
+ chop;
+ while (/\\$/) {
+ chop;
+ $_ .= <IN>;
+ chop;
+ }
+ if (s:/\*:\200:g) {
+ s:\*/:\201:g;
+ s/\200[^\201]*\201//g; # delete single line comments
+ if (s/\200.*//) { # begin multi-line comment?
+ $_ .= '/*';
+ $_ .= <IN>;
+ redo;
+ }
+ }
+ if (s/^#\s*//) {
+ if (s/^define\s+(\w+)//) {
+ $name = $1;
+ $new = '';
+ s/\s+$//;
+ if (s/^\(([\w,\s]*)\)//) {
+ $args = $1;
+ if ($args ne '') {
+ foreach $arg (split(/,\s*/,$args)) {
+ $arg =~ s/^\s*([^\s].*[^\s])\s*$/$1/;
+ $curargs{$arg} = 1;
+ }
+ $args =~ s/\b(\w)/\$$1/g;
+ $args = "local($args) = \@_;\n$t ";
+ }
+ s/^\s+//;
+ do expr();
+ $new =~ s/(["\\])/\\$1/g;
+ if ($t ne '') {
+ $new =~ s/(['\\])/\\$1/g;
+ print OUT $t,
+ "eval 'sub $name {\n$t ${args}eval \"$new\";\n$t}';\n";
+ }
+ else {
+ print OUT "sub $name {\n ${args}eval \"$new\";\n}\n";
+ }
+ %curargs = ();
+ }
+ else {
+ s/^\s+//;
+ do expr();
+ $new = 1 if $new eq '';
+ if ($t ne '') {
+ $new =~ s/(['\\])/\\$1/g;
+ print OUT $t,"eval 'sub $name {",$new,";}';\n";
+ }
+ else {
+ print OUT $t,"sub $name {",$new,";}\n";
+ }
+ }
+ }
+ elsif (/^include\s+<(.*)>/) {
+ ($incl = $1) =~ s/\.h$/.ph/;
+ print OUT $t,"require '$incl';\n";
+ }
+ elsif (/^ifdef\s+(\w+)/) {
+ print OUT $t,"if (defined &$1) {\n";
+ $tab += 4;
+ $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
+ }
+ elsif (/^ifndef\s+(\w+)/) {
+ print OUT $t,"if (!defined &$1) {\n";
+ $tab += 4;
+ $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
+ }
+ elsif (s/^if\s+//) {
+ $new = '';
+ $inif = 1;
+ do expr();
+ $inif = 0;
+ print OUT $t,"if ($new) {\n";
+ $tab += 4;
+ $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
+ }
+ elsif (s/^elif\s+//) {
+ $new = '';
+ $inif = 1;
+ do expr();
+ $inif = 0;
+ $tab -= 4;
+ $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
+ print OUT $t,"}\n${t}elsif ($new) {\n";
+ $tab += 4;
+ $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
+ }
+ elsif (/^else/) {
+ $tab -= 4;
+ $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
+ print OUT $t,"}\n${t}else {\n";
+ $tab += 4;
+ $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
+ }
+ elsif (/^endif/) {
+ $tab -= 4;
+ $t = "\t" x ($tab / 8) . ' ' x ($tab % 8);
+ print OUT $t,"}\n";
+ }
+ }
+ }
+ print OUT "1;\n";
+}
+
+sub expr {
+ while ($_ ne '') {
+ s/^(\s+)// && do {$new .= ' '; next;};
+ s/^(0x[0-9a-fA-F]+)// && do {$new .= $1; next;};
+ s/^(\d+)// && do {$new .= $1; next;};
+ s/^("(\\"|[^"])*")// && do {$new .= $1; next;};
+ s/^'((\\"|[^"])*)'// && do {
+ if ($curargs{$1}) {
+ $new .= "ord('\$$1')";
+ }
+ else {
+ $new .= "ord('$1')";
+ }
+ next;
+ };
+ s/^sizeof\s*\(([^)]+)\)/{$1}/ && do {
+ $new .= '$sizeof';
+ next;
+ };
+ s/^([_a-zA-Z]\w*)// && do {
+ $id = $1;
+ if ($id eq 'struct') {
+ s/^\s+(\w+)//;
+ $id .= ' ' . $1;
+ $isatype{$id} = 1;
+ }
+ elsif ($id eq 'unsigned') {
+ s/^\s+(\w+)//;
+ $id .= ' ' . $1;
+ $isatype{$id} = 1;
+ }
+ if ($curargs{$id}) {
+ $new .= '$' . $id;
+ }
+ elsif ($id eq 'defined') {
+ $new .= 'defined';
+ }
+ elsif (/^\(/) {
+ s/^\((\w),/("$1",/ if $id =~ /^_IO[WR]*$/i; # cheat
+ $new .= " &$id";
+ }
+ elsif ($isatype{$id}) {
+ if ($new =~ /{\s*$/) {
+ $new .= "'$id'";
+ }
+ elsif ($new =~ /\(\s*$/ && /^[\s*]*\)/) {
+ $new =~ s/\(\s*$//;
+ s/^[\s*]*\)//;
+ }
+ else {
+ $new .= $id;
+ }
+ }
+ else {
+ if ($inif && $new !~ /defined\($/) {
+ $new .= '(defined(&' . $id . ') ? &' . $id . ' : 0)';
+ } else {
+ $new .= ' &' . $id;
+ }
+ }
+ next;
+ };
+ s/^(.)// && do {$new .= $1; next;};
+ }
+}
+##############################################################################
+
+ # These next few lines are legal in both Perl and nroff.
+
+.00 ; # finish .ig
+
+'di \" finish diversion--previous line must be blank
+.nr nl 0-1 \" fake up transition to first page again
+.nr % 0 \" start at page 1
+'; __END__ ############# From here on it's a standard manual page ############
+.TH H2PH 1 "August 8, 1990"
+.AT 3
+.SH NAME
+h2ph \- convert .h C header files to .ph Perl header files
+.SH SYNOPSIS
+.B h2ph [headerfiles]
+.SH DESCRIPTION
+.I h2ph
+converts any C header files specified to the corresponding Perl header file
+format.
+It is most easily run while in /usr/include:
+.nf
+
+ cd /usr/include; h2ph * sys/*
+
+.fi
+If run with no arguments, filters standard input to standard output.
+.SH ENVIRONMENT
+No environment variables are used.
+.SH FILES
+/usr/include/*.h
+.br
+/usr/include/sys/*.h
+.br
+etc.
+.SH AUTHOR
+Larry Wall
+.SH "SEE ALSO"
+perl(1)
+.SH DIAGNOSTICS
+The usual warnings if it can't read or write the files involved.
+.SH BUGS
+Doesn't construct the %sizeof array for you.
+.PP
+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.
+.PP
+It's only intended as a rough tool.
+You may need to dicker with the files produced.
+.ex
+!NO!SUBS!
+
+close OUT or die "Can't close $file: $!";
+chmod 0755, $file or die "Can't reset permissions for $file: $!\n";
+exec("$Config{'eunicefix'} $file") if $Config{'eunicefix'} ne ':';
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