replace_dowhile.rb


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#!/usr/bin/env ruby
# coding: binary
Dir["**/*.c"].each do |f|
    t = File.read(f)
    if t.gsub!(/^(\s*)([^\n\{]+)\n\1(while[^\n\{;]+)\n\s*\2/, "\\1do \\2\n\\1\\3;")
        File.open(f,'w') {|s| s << t }
        puts "#{f} modified"
    end
end