def check_sass_encoding(str)
if ruby1_8?
return str.gsub(/\A\xEF\xBB\xBF/, '').gsub(/\r\n?|\f/, "\n"), nil
end
binary = str.dup.force_encoding("BINARY")
if binary.start_with?(UTF_8_BOM)
binary.slice! 0, UTF_8_BOM.length
str = binary.force_encoding('UTF-8')
elsif binary.start_with?(UTF_16BE_BOM)
binary.slice! 0, UTF_16BE_BOM.length
str = binary.force_encoding('UTF-16BE')
elsif binary.start_with?(UTF_16LE_BOM)
binary.slice! 0, UTF_16LE_BOM.length
str = binary.force_encoding('UTF-16LE')
elsif binary =~ CHARSET_REGEXP
charset = $1.force_encoding('US-ASCII')
if ruby1_9_2? && charset.downcase == 'utf-16'
encoding = Encoding.find('UTF-8')
else
encoding = Encoding.find(charset)
if encoding.name == 'UTF-16' || encoding.name == 'UTF-16BE'
encoding = Encoding.find('UTF-8')
end
end
str = binary.force_encoding(encoding)
elsif str.encoding.name == "ASCII-8BIT"
str = str.force_encoding('utf-8')
end
find_encoding_error(str) unless str.valid_encoding?
begin
return str.encode("UTF-8").gsub(/\r\n?|\f/, "\n").tr("\u0000", "�"), str.encoding
rescue EncodingError
find_encoding_error(str)
end
end