windows-1255 encoding: add mapping for 0xCA · Issue #73 · whatwg/encoding (original) (raw)

The windows-1255 specified through the spec does NOT map the byte 0xCA.

However, the main use of windows-1255 is as a codepage on Windows, and the native Windows converter (function MultiByteToWideChar) maps 0xCA to U+05BA, already since Windows 2000, i.e. for 15 years.

On the other hand, the codepage chart at Microsoft https://msdn.microsoft.com/en-us/library/cc195057.aspx marks this position as "not used", and the majority of non-Windows conversion software does not map the byte 0xCA.

For details of these mapping tables, see
http://haible.de/bruno/charsets/conversion-tables/index.html
http://haible.de/bruno/charsets/conversion-tables/CP1255.html

The implementation of the change would be to edit index-windows-1255.txt, adding a line
74 0x05BA (HEBREW POINT HOLAM HASER FOR VAV)