def checkcache(filename=nil, use_script_lines=false)
if !filename
filenames = @@file_cache.keys()
elsif @@file_cache.member?(filename)
filenames = [filename]
else
return nil
end
result = []
for filename in filenames
next unless @@file_cache.member?(filename)
path = @@file_cache[filename].path
if File.exist?(path)
cache_info = @@file_cache[filename]
stat = File.stat(path)
if stat &&
(cache_info.size != stat.size or cache_info.mtime != stat.mtime)
result << filename
update_cache(filename, use_script_lines)
end
end
end
return result
end