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Rory O'Kane Snippet ID Download Version Date Posted Author Delete 335 1.0.1 2008-01-10 11:19 Rory O'Kane Changes since last version:: Re-indented to two spaces to see the levels more easily 146 1.0 2006-04-17 05:51 Saajan N

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Latest Snippet Version: :1.0.1

# Splits a file (eg. abc.ext) to a number of smaller files (eg. abc.ext.piece1, abc.ext.piece2 etc)
# Does not do any error handling
# Expects file to be split to exist in the current directory!
# Usage: ruby file_splitter.rb <filename.ext> <num_of_pieces>
# Example: ruby file_splitter.rb myfile.txt 10

class FileSplitter
  def initialize(filename, num_of_splits)
    @filename = filename
    @file = File.new(filename, "rb")
    @num_of_splits = num_of_splits
    
    # when we are splitting a file into a given number of pieces, the last piece could be bigger than the others
    @each_size, @extra = File.size(filename).divmod(@num_of_splits)
  end
  
  def split
    (1..@num_of_splits).each do |n|
      File.open(@filename + ".piece#{n}", "wb") do |f|
        f << @file.read(@each_size) 
        if n == @num_of_splits and not @extra.nil?
          f << @file.read(@extra)
        end
      end
    end
  end
end

if ARGV.size != 2
  puts "Usage: ruby file_splitter.rb <filename.ext> <num_of_pieces>"
  puts "Example: ruby file_splitter.rb myfile.txt 10"
else
  FileSplitter.new(ARGV[0], ARGV[1].to_i).split
end
		

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