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List:       xfree-i18n
Subject:    [I18n]keysyms: XK_Greek_SIGMA off by one
From:       Markus Kuhn <Markus.Kuhn () cl ! cam ! ac ! uk>
Date:       2001-04-27 18:32:57
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     VERSION:

R6.6 and older

     CLIENT MACHINE and OPERATING SYSTEM:
     DISPLAY TYPE:
     WINDOW MANAGER:
     COMPILER:

irrelevant

     AREA:

Xlib

     SYNOPSIS:

Wrong keysym code for XK_Greek_SIGMA in include/keysymdef.h

     DESCRIPTION:

include/keysymdef.h says

  #define XK_Greek_SIGMA                                 0x7d2

but http://www.unicode.org/Public/MAPPINGS/ISO8859/8859-7.TXT
says

  0xD3    0x03A3  #       GREEK CAPITAL LETTER SIGMA

therefore, XK_Greek_SIGMA really ought to have been at 0x7d3,
not 0x7d2. ISO 8859 keysyms were supposed to show the correct
code position in ISO 8859 in the lower byte.

Another reference (if you don't trust the Unicode table):

  http://www.itscj.ipsj.or.jp/ISO-IR/126.pdf
  also shows that 0xd2 is unused in ISO 8859-7 and 0xd3 is capital sigma

     REPEAT BY:

Read the spec.

     SAMPLE FIX:

The proper fix would be to fix the keysym. There might be someone
mumbling about backwards compatibility though, not sure. At least the
keysym->UCS table should map both 0x7d2 and 0x7d3 to U+03A3 (just like
both 0x13a4 and 0x20ac should map to U+20AC) to allow for a future fix
towards ISO 8859 compatibility. At least document in a comment that the
value is wrong.

Markus

-- 
Markus G. Kuhn, Computer Laboratory, University of Cambridge, UK
Email: mkuhn at acm.org,  WWW: <http://www.cl.cam.ac.uk/~mgk25/>

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