contrib: add "lar" - initial work on lua archive format

[project/luci.git] / contrib / lar / lar.pl

diff --git a/contrib/lar/lar.pl b/contrib/lar/lar.pl
new file mode 100755 (executable)
index 0000000..56e4897
--- /dev/null
+++ b/contrib/lar/lar.pl
@@ -0,0 +1,50 @@
+#!/usr/bin/perl
+
+use strict;
+
+@ARGV || die "Usage: $0 <file1> <file2> ... <fileN>\n";
+
+my @index;
+my $offset = 0;
+
+foreach my $file ( @ARGV )
+{
+       if( -f $file && open F, "< $file" )
+       {
+               warn sprintf "Member at 0x%08X\n", $offset;
+               push @index, [ ];
+
+               my $size = length $file;
+
+               print $file;
+               print "\0" x ( $size % 4 );
+
+               $index[-1][0] = $offset;
+               $index[-1][1] = $size;
+               $index[-1][2] = $offset + $size + ( $size % 4 );
+
+               
+               $size = 0;
+               while( read F, my $buffer, 4096 ) {
+                       $size += length $buffer;
+                       print $buffer;
+               }
+               print "\0" x ( $size % 4 );
+
+               $index[-1][3] = $size;
+               $offset = $index[-1][2] + $size + ( $size % 4 );
+
+               close F;
+       }
+}
+
+
+foreach my $file ( @index )
+{
+       warn sprintf "Index: 0x%08X 0x%08X 0x%08X 0x%08X\n", $file->[0], $file->[1], $file->[2], $file->[3];
+       print pack "NNNNnn", $file->[0], $file->[1], $file->[2], $file->[3], 0x0000, 0x0000;
+}
+
+warn sprintf "Index at 0x%08X, length 0x%08X\n", $offset, @index * 20;
+print pack "N", $offset;
+