Reading Tribes 1 dts files

read_tribes1dts.rb

#!/usr/bin/ruby

# Basic attempt at reading Tribes 1 .dts files
# Appears to be some sort of nested IFF-like block format

File.open(ARGV[0]) do |f|
  pos = 0
  while !f.eof
    f.seek pos
    magic = f.read(4).unpack("L<")[0]
    if magic != 0x53524550 # PERS
      pos += 1
      next
    end
    
    size, namesize = f.read(4+2).unpack("L<S<")
    name = f.read(namesize)
    
    puts "BLOCK: #{name} @ #{pos} [#{size} bytes]"
    pos += 4+4+2+namesize # Skip this block header
  end
end