perl-Convert-XText

Convert from and to RFC 1891 xtext encoding

RFC1891 defines the xtext encoding for delivery service notifications, to encode non-standard-ascii characters and special chars in a simple and fast, as well as easily reversible, way. The input data for encode_xtext simply converts all characters outside the range of 'chr(33)' _(!)_ to 'chr(126)' _(~)_, as well as the plus _(+)_ and equal _(=)_ sign, into a plus sign followed by a two digit uppercase hexadecimal representation of the character code. For example, the _"="_ sign, ASCII 61 or \x3d, will be converted to *+3D*.

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