A Perl script which tries to "compress" headers by removing comments and

superfluous whitespace.

tools/tools/hcomp/Makefile

@@ -0,0 +1,13 @@
+# $FreeBSD$
+
+BINDIR		?= ${HOME}/bin
+BINOWN		?= ${USER}
+BINGRP		?= ${USER}
+SCRIPTS		 = hcomp.pl
+
+MANDIR		?= ${HOME}/man/man
+MANOWN		?= ${USER}
+MANGRP		?= ${USER}
+MAN		 = # empty
+
+.include <bsd.prog.mk>

tools/tools/hcomp/hcomp.pl

@@ -0,0 +1,93 @@
+#!/usr/bin/perl -w
+#-
+# Copyright (c) 2003 Dag-Erling Coïdan Smørgrav
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer
+#    in this position and unchanged.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. The name of the author may not be used to endorse or promote products
+#    derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+
+use strict;
+use Getopt::Std;
+
+our $opt_b;
+our $opt_v;
+
+sub hcomp($)
+{
+    my $fn = shift;
+
+    local *FILE;
+    my $header;
+
+    warn("$fn\n")
+	if ($opt_v);
+
+    open(FILE, "<", $fn)
+	or die("$fn: $!\n");
+    $header = join('', <FILE>);
+    close(FILE);
+
+    # Remove comments
+    $header =~ s|/\*.*?\*/||gs;
+    $header =~ s|//.*$||gm;
+
+    # Collapse preprocessor directives
+    while ($header =~ s|(\n\#.*?)\\\n|$1|gs) {
+	# nothing
+    }
+
+    # Remove superfluous whitespace
+    $header =~ s|^\s+||s;
+    $header =~ s|^\s+||gm;
+    $header =~ s|\s+$||s;
+    $header =~ s|\s+$||gm;
+    $header =~ s|\n+|\n|gs;
+    $header =~ s|[ \t]+| |gm;
+
+    open(FILE, ">", "$fn.new")
+	or die("$fn.new: $!\n");
+    print(FILE $header);
+    close(FILE);
+
+    rename($fn, "$fn.$opt_b")
+	if defined($opt_b);
+    rename("$fn.new", $fn);
+}
+
+sub usage()
+{
+    print(STDERR "usage: hcomp [-b ext] file ...\n");
+    exit(1);
+}
+
+MAIN:{
+    my %opts;
+    getopts('b:v')
+	or usage();
+    foreach (@ARGV) {
+	hcomp($_);
+    }
+}