|new()||Returns a new instance of a Unicode::IMAPUtf7 object.|
|encode($text)||Returns the modified UTF7-text for a string in UTF8.|
|decode($text)||Returns the decoded string into UTF8 data.|
By convention, international mailbox names are specified using a modified version of the UTF-7 encoding described in [UTF-7]. The purpose of these modifications is to correct the following problems with UTF-7:
1) UTF-7 uses the + character for shifting; this conflicts with
the common use of + in mailbox names, in particular USENET
2) UTF-7s encoding is BASE64 which uses the / character; this
conflicts with the use of / as a popular hierarchy delimiter.
3) UTF-7 prohibits the unencoded usage of \; this conflicts with
the use of \ as a popular hierarchy delimiter.
4) UTF-7 prohibits the unencoded usage of ~; this conflicts with
the use of ~ in some servers as a home directory indicator.
5) UTF-7 permits multiple alternate forms to represent the same
string; in particular, printable US-ASCII chararacters can be
represented in encoded form.
In modified UTF-7, printable US-ASCII characters except for & represent themselves; that is, characters with octet values 0x20-0x25 and 0x27-0x7e. The character & (0x26) is represented by the two- octet sequence &-.
All other characters (octet values 0x00-0x1f, 0x7f-0xff, and all Unicode 16-bit octets) are represented in modified BASE64, with a further modification from [UTF-7] that , is used instead of /. Modified BASE64 MUST NOT be used to represent any printing US-ASCII character which can represent itself.
& is used to shift to modified BASE64 and - to shift back to US- ASCII. All names start in US-ASCII, and MUST end in US-ASCII (that is, a name that ends with a Unicode 16-bit octet MUST end with a - ).
For example, here is a mailbox name which mixes English, Japanese, and Chinese text: ~peter/mail/&ZeVnLIqe-/&U,BTFw-
Please report any requests, suggestions or bugs via the RT bug-tracking system at http://rt.cpan.org/ or email to bug-Unicode-IMAPUtf7\@rt.cpan.org.
Fabien Potencier, firstname.lastname@example.org
This software may be freely copied and distributed under the same terms and conditions as Perl.
Hey! <B>The above document had some coding errors, which are explained below:B>
Around line 12: Non-ASCII character seen before =encoding in $t->encode(Re\k:'Assuming UTF-8
|perl v5.20.3||UNICODE::IMAPUTF7 (3)||2004-08-29|