stringprep - Implementation of stringprep

       Sergei Golovan

       This  document,  and  the package it describes, will undoubtedly contain bugs and other problems.  Please
       report such in the category stringprep of  the  TcllibTrackers  [http://core.tcl.tk/tcllib/reportlist].
       Please also report any ideas for enhancements you may have for either package and/or documentation.

       When proposing code changes, please provide unifieddiffs, i.e the output of diff-u.

       Note  further  that  attachments  are strongly preferred over inlined patches. Attachments can be made by
       going to the Edit form of the ticket immediately after its creation, and then using the left-most  button
       in the secondary navigation bar.

::stringprep::registerprofile ?-mappinglist? ?-normalizationform? ?-prohibitedlist? ?-prohibitedListlist? ?-prohibitedCommandcommand? ?-prohibitedBidiboolean?
              Register the stringprep profile named profile. Options are the following.

              Option  -mapping  specifies  stringprep  mapping tables.  This parameter takes list of tables from
              appendix B of RFC-3454. The usual list values are {B.1  B.2}  or  {B.1  B.3}  where  B.1  contains
              characters  which commonly map to nothing, B.3 specifies case folding, and B.2 is used in profiles
              with unicode normalization form KC. Defult value is {} which means no mapping.

              Option -normalization takes a string and if it is nonempty then it  uses  as  a  name  of  Unicode
              normalization  form. Any value of "D", "C", "KD" or "KC" may be used, though RFC-3454 defines only
              two options: no normalization or normalization using form KC.

              Option -prohibited takes a list of RFC-3454 tables with  prohibited  characters.  Current  version
              does  allow  to  prohibit either all tables from C.3 to C.9 or neither of them. An example of this
              list for RFC-3491 is {A.1 C.1.2 C.2.2 C.3 C.4 C.5 C.6 C.7 C.8 C.9}.

              Option -prohibitedList specifies a list of additional prohibited characters. The list contains not
              characters themselves but their Unicode numbers. For example, Nodeprep specification from RFC-3920
              forbids the following codes: {0x22 0x26 0x27 0x2f 0x3a 0x3c 0x3e 0x40} (\" \& \' / : < > @).

              Option -prohibitedCommand specifies a command which is called for every character code  in  mapped
              and  normalized  string.  If the command returns true then the character is considered prohibited.
              This option is useful when a list for -prohibitedList is too large.

              Option -prohibitedBidi takes boolean value and if it is  true  then  the  bidirectional  character
              processing rules defined in section 6 of RFC-3454 are used.

       ::stringprep::stringprepprofilestring
              Performs  stringprep  operations defined in profile profile to string string. Result is a prepared
              string or one  of  the  following  errors:  invalid_profile  (profile  profile  is  not  defined),
              prohibited_character  (string  string  contains a prohibited character) or prohibited_bidi (string
              string contains a prohibited bidirectional sequence).

       ::stringprep::compareprofilestring1string2
              Compares two unicode strings prepared accordingly  to  stringprep  profile  profile.  The  command
              returns  0 if prepared strings are equal, -1 if string1 is lexicographically less than string2, or
              1 if string1 is lexicographically greater than string2.

       Copyright (c) 2007-2009, Sergei Golovan <sgolovan@nes.ru>

tcllib                                                1.0.3                                     stringprep(3tcl)

       This is an implementation in Tcl of the  Preparation  of  Internationalized  Strings  ("stringprep").  It
       allows to define stringprep profiles and use them to prepare Unicode strings for comparison as defined in
       RFC-3454.

       Nameprep profile definition (see RFC-3491):

              ::stringprep::register nameprep  -mapping {B.1 B.2}  -normalization KC  -prohibited {A.1 C.1.2 C.2.2 C.3 C.4 C.5 C.6 C.7 C.8 C.9}  -prohibitedBidi 1

       Nodeprep and resourceprep profile definitions (see RFC-3920):

              ::stringprep::register nodeprep  -mapping {B.1 B.2}  -normalization KC  -prohibited {A.1 C.1.1 C.1.2 C.2.1 C.2.2 C.3 C.4 C.5 C.6 C.7 C.8 C.9}  -prohibitedList {0x22 0x26 0x27 0x2f 0x3a 0x3c 0x3e 0x40}  -prohibitedBidi 1

              ::stringprep::register resourceprep  -mapping {B.1}  -normalization KC  -prohibited {A.1 C.1.2 C.2.1 C.2.2 C.3 C.4 C.5 C.6 C.7 C.8 C.9}  -prohibitedBidi 1

       stringprep, unicode

       stringprep - Implementation of stringprep

       [1]    "Preparation of Internationalized Strings ('stringprep')", (http://www.ietf.org/rfc/rfc3454.txt)

       [2]    "Nameprep:    A    Stringprep    Profile    for    Internationalized    Domain    Names    (IDN)",
              (http://www.ietf.org/rfc/rfc3491.txt)

       [3]    "Extensible Messaging and Presence Protocol (XMPP): Core", (http://www.ietf.org/rfc/rfc3920.txt)

unicode(3tcl)

       package require Tcl8.59

       package require stringprep1.0.3::stringprep::registerprofile ?-mappinglist? ?-normalizationform? ?-prohibitedlist? ?-prohibitedListlist? ?-prohibitedCommandcommand? ?-prohibitedBidiboolean?

       ::stringprep::stringprepprofilestring::stringprep::compareprofilestring1string2

________________________________________________________________________________________________________________