* ../v4l/scripts/gentree.pl:

        - Add new script to create a clean tree (without uneeded #if).

        Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>

1 files changed, 186 insertions, 0 deletions

diff --git a/v4l/scripts/gentree.pl b/v4l/scripts/gentree.pl
new file mode 100644
index 000000000..21076092e
--- /dev/null
+++ b/v4l/scripts/gentree.pl
@@ -0,0 +1,186 @@
+#!/usr/bin/perl
+use strict;
+use File::Find;
+use Fcntl ':mode';
+use Cwd;
+
+my $VER = shift;
+my $SRC = shift;
+my $DESTDIR = shift;
+my $cwd;
+
+$SRC   = "../linux"		if !defined($SRC);
+$VER = "2.6.14"			if !defined($VER);
+$DESTDIR = "/tmp/linux"		if !defined($DESTDIR);
+
+my ($VERSION,$CODE) = &kernel_version;
+my $DEBUG = 0;
+
+
+#################################################################
+# helpers
+
+sub kernel_version() {
+	my ($ver,$code);
+
+	$code = 0;
+	$ver = $VER;
+
+	$ver =~ m/^(\d)\.(\d)\.(\d)/;
+	my $v1 = $1;
+	my $v2 = $2;
+	my $v3 = $3;
+	foreach my $name ($v1, $v2, $v3) {
+		$code = $code * 256 + $1;
+	}
+
+	return ($ver,$code);
+}
+
+
+#################################################################
+# filter out version-specific code
+
+sub filter_source ($$) {
+	my ($in,$out) = @_;
+	my ($line,$if,$state,$mmkernel);
+
+	open IN,  "<$in";
+	open OUT, ">$out";
+
+	while ($line = <IN>) {
+		die "nested" if defined($state) && $line =~ /^#if/;
+		if ($line =~ m/^#include <linux\/version.h>/ &&
+		    $in   =~ m/.*\.c/) {
+			next;
+		}
+		if ($line =~ m/^#include \"compat.h\"/) {
+			next;
+		}
+		if ($line =~ m/\$Id: gentree.pl,v 1.1 2005/10/19 14:43:56 mchehab Exp $/) {
+			next;
+		}
+		if ($line =~ /^#ifdef MM_KERNEL/) {
+			chomp($line);
+			$state = "if";
+			$if = $mmkernel;
+			print OUT "/* BP #if $if ($line) */\n" if $DEBUG;
+			next;
+		}
+		if ($line =~ /^#if 0/) {
+			chomp($line);
+			$state = "if";
+			$if = 0;
+			print OUT "/* BP #if $if ($line) */\n" if $DEBUG;
+			next;
+		}
+		if ($line =~ /^#if 1 .*KEEP.*/) {
+			print OUT "#if 1\n";
+			next;
+		}
+		if ($line =~ /^#if 1/) {
+			chomp($line);
+			$state = "if";
+			$if = 1;
+			print OUT "/* BP #if $if ($line) */\n" if $DEBUG;
+			next;
+		}
+		if ($line =~ /^#if.*BTTV_VERSION_CODE/) {
+			chomp($line);
+			$state = "if";
+			$line =~ s@^#if\s*@@;
+			$line =~ s@BTTV_VERSION_CODE@\$CODE@;
+			$line =~ s@KERNEL_VERSION\((\d+),\s*(\d+),\s*(\d+)\)@
+					sprintf("%d",$1*65536 + $2*256 + $3) @e;
+			$if = eval $line;
+			print OUT "/* BP #if $if ($line) */\n" if $DEBUG;
+			next;
+		}
+		if ($line =~ /^#if.*LINUX_VERSION_CODE/) {
+			chomp($line);
+			$line =~ s@^#if\s*@@;
+			$line =~ s@LINUX_VERSION_CODE@\$CODE@;
+			$line =~ s@KERNEL_VERSION\((\d+),\s*(\d+),\s*(\d+)\)@
+					sprintf("%d",$1*65536 + $2*256 + $3) @e;
+			$if = eval $line;
+			$state = "if";
+			print OUT "/* BP #if $if ($line) */\n" if $DEBUG;
+			next;
+		}
+		if (defined($state) && $line =~ /^#else/) {
+			$state = "else";
+			print OUT "/* BP #else */\n" if $DEBUG;
+			next;
+		}
+		if (defined($state) && $line =~ /^#endif/) {
+			undef $state;
+			print OUT "/* BP #endif */\n" if $DEBUG;
+			next;
+		}
+		if (!defined($state)		||
+		    $state eq "if"   && $if	||
+		    $state eq "else" && !$if) {
+			print OUT $line;
+		} else {
+			chomp($line);
+			print OUT "/* BP DEL $line */\n" if $DEBUG;
+		}
+	}
+	close IN;
+	close OUT;
+}
+
+#################################################################
+
+sub parse_dir {
+	my $file = $File::Find::name;
+	my $srcdir=$SRC;
+
+	if ($file =~ /CVS/) {
+		return;
+	}
+
+	if ($file =~ /\~$/) {
+		return;
+	}
+
+	my $mode = (lstat("$cwd/$file"))[2];
+
+#	printf "Permissions of %s/%s are %04o (dir=%s\n", $cwd,$file, $mode, cwd;
+
+	if ($mode & S_IFDIR) {
+		return;
+	}
+
+	$srcdir =~ s/(.)/[\]($1)/g;
+	my $f2 = $file;
+
+	$f2 =~ s,^$srcdir,$DESTDIR,;
+	print STDERR "from $file to $f2\n";
+
+	my $tmp = "/tmp/src.$$";
+	filter_source("$cwd/$file","$tmp");
+
+	my $dir = $f2;
+	$dir =~ s,(.*)[/][^/]*$,$1,;
+
+	print("mkdir -p $dir\n");
+	system("mkdir -p $dir\n");
+	system("cp $tmp $f2");
+	unlink $tmp;
+}
+
+
+# main
+
+my $patchtmploc = "/tmp/temp.patch";
+
+printf STDERR <<EOF,$VER,$CODE;
+kernel is %s (0x%x)
+EOF
+
+print STDERR "finding files at $SRC\n";
+
+$cwd=cwd;
+
+find(\&parse_dir, $SRC);