[GHC] #3977: Support double-byte encodings (Chinese/Japanese/Korean) on Windows

[GHC]

#3977: Support double-byte encodings (Chinese/Japanese/Korean) on Windows
-------------------------------------+-------------------------------------
              Reporter:  shelarcy    |            Owner:  batterseapower
                  Type:  feature     |           Status:  closed
  request                            |        Milestone:
              Priority:  low         |          Version:  6.13
             Component:  Core        |         Keywords:
  Libraries                          |     Architecture:  Unknown/Multiple
            Resolution:  fixed       |       Difficulty:  Unknown
      Operating System:  Windows     |       Blocked By:
       Type of failure:  Incorrect   |  Related Tickets:  #5754
  result at runtime                  |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
-------------------------------------+-------------------------------------
Changes (by thomie):

 * cc: core-libraries-committee@… (added)
 * status:  new => closed
 * resolution:   => fixed
 * milestone:  7.10.1 =>


Comment:

 commit 2216b89740cff6fd3225eb16e354b64f988d2900
 {{{
 Author: Max Bolingbroke <>
 Date:   Thu Apr 18 21:29:08 2013 +0100

     Support for Windows DBCS and new SBCS with MultiByteToWideChar

     Because MultiByteToWideChar/WideCharToMultiByte have a rather
 unhelpful
     interface, we have to use a lot of binary searching tricks to get them
     to match the iconv-like interface that GHC requires.

     Even though the resulting encodings are slow, it does at least mean
 that we
     now support all of Window's code pages. What's more, since these
 codecs are
     basically only used for console output there probably won't be a huge
 volume
     of text to deal with in the common case, so speed is less of a worry.

     Note that we will still use GHC's faster table-based custom codec for
 supported
     SBCSs.
 }}}
 commit 802e99a51955bcf3ba830ec5209470ffef93581b
 {{{
 Author: Max Bolingbroke <>
 Date:   Tue Apr 23 19:15:02 2013 +0100

     Add comprehensive test for codepage encodings+recovery for them
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/3977#comment:20>
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