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#!/usr/bin/env ruby
comment_buffer = []
KEEP_LIST = %w(HAVE_CDDB HAVE_JOLIET HAVE_DARWIN_CDROM HAVE_BSDI_CDROM)
def handle_define_undefine(keyword, line, comment_buffer)
if KEEP_LIST.member?(keyword)
puts
comment_buffer.each {|line| print line}
print line
end
comment_buffer = []
end
in_comment = false
File.open("/tmp/config.h").readlines.each do |line|
if match = line.match('^#define ([A-Z_]+)')
handle_define_undefine(match[1], line, comment_buffer)
in_comment = false
elsif match = line.match('^/[*] #undef ([A-Z_]+)')
handle_define_undefine(match[1], line, comment_buffer)
in_comment = false
elsif keyword = line.match('^/[*]')
comment_buffer.push(line)
in_comment = not(line.match('\*/$'))
elsif in_comment
comment_buffer.push(line)
in_comment = not(line.match('\*/$'))
else
comment_buffer = []
end
end
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