How to search for ascii char sequence in binary file

ruby-talk
1

So I'm trying to convert e.g. 'RIFF' to e.g. '52494646'. What's the
best way to do that? I don't know what the former string will be, be I
know it will be exactly four characters.

I'm searching a binary file for the latter string, but I'm given the
former as the search term. I'm thinking something like this for the
search:

puts File.read('file.wav').index('52494646')

So... best way to do the conversion, and best way to do the search.
Ideas?

Earle

···

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2

So... best way to do the conversion, and best way to do the search.
Ideas?

Earle

Here's a way to do the conversion. No ideas on the search.

class String
  def to_hex_string
    r = ''
    self.each_byte{|c| r << c.to_s(16)}
    r
  end
end

# unit test
require 'test/unit'

class TestString < Test::Unit::TestCase

  def test_convert
    assert_equal( '52494646', 'RIFF'.to_hex_string)
  end

end

Regards,

Gordon