Converting Legacy Mac OS Japanese Encoding to Unicode in Windows

Question

Several years ago, Apple released a document that outlines the mappings between Apple's "Mac OS Japanese" Character Set and Unicode code points. (ftp://ftp.unicode.org/Public/MAPPINGS/VENDORS/APPLE/JAPANESE.TXT)

Microsoft provides the function, MultiByteToWideChar, to assist with mapping characters to a UTF-16 string.

MultiByteToWideChar works correctly for some Japanese characters in Apple's legacy character set (see FTP link, above), but returns "no mapping available" for others (For example, 0x85BE is supposed to map to Unicode 0x217B (SMALL ROMAN NUMERAL TWELVE), however it fails.)

I am using code page 10001 (Japanese-Mac).

Am I overlooking something obvious or is the code page for mapping Japanese-Mac to UTF-16 simply incomplete on Windows?

Answer 1

x-mac-japanese is usually treated as SHIFT_JIS by Windows -- and the problem is x-mac-japanese is a superset of SHIFT_JIS, so stuff will be missing. For instance, there is nothing in the 0x85oo range in SHIFT_JIS.