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s:12:\"robots\\.txt$\";

#!/usr/bin/env ruby

Encoding.default_external = Encoding::UTF_8
Encoding.default_internal = Encoding::UTF_8

def fix_file file
	text = File.read file

	fixed = fix_serialization text

	open file, 'w' do |io|
	io.write fixed
	end
end

def fix_serialization text
	pattern = /(s\s*:\s*)(\d+)((\s*:\\*["&])(.*?)(\\?\"\s*;))/
	php_escapes = /(\\r|\\n|\\t|\\v)/

	text.gsub( pattern ) do |match|
		front = $1
		back = $3

		puts $2
		count = $5.length - $5.scan(php_escapes).length

		"#{front}#{count}#{back}"

	end
end

test_1 = fix_serialization "s:12:\"robots\\.txt$\";"

raise test_1 unless "s:12:\"robots\\.txt$\";" == test_1

fix_file 'test.sql'