Yes, you are correct that Sun's all EUC locale's primary codeset is
either US-ASCII or each locale's national variation of ISO 646 like KS C 5636
for Korean case and JIS X0201 for Japanese case and so on. Other EUC
supplementary codesets are as specified in the PS file.
] Mime-Version: 1.0
] Content-Transfer-Encoding: 7BIT
] To: Multiple Recipients of <firstname.lastname@example.org>
] From: Jungshik Shin <email@example.com>
] Date: Fri, 16 Jan 1998 13:12:39 -0800 (PST)
] Subject: Re: mbstowcs and UNICODE
] On Thu, 4 Dec 1997, Ienup Sung wrote:
] Thank you for the info on iconv() in Solaris 2.6.
] > Sun supports various code conversions among:
] > UCS-2, UCS-4, UTF-8, UTF-7, UTF-16, SJIS, Japanese EUC, Korean EUC,
] > Traditional Chinese EUC, BIG5, Simplified EUC,
] > ISO 8859-1 ~ 10, KOI8-R, ISO-2022-KR, ISO-2022-CN, ISO-2022-TW, ...
] > as like attached picture in PostScript file since Solaris 2.6. All of them
] > available through iconv(1) utility and also iconv(3) APIs. We are also
] > adding more code conversions like TIS620 and so on at the Solaris 2.7.
] Taking another look at the attached Postscript file, I found a small
] glitch I overlooked before. The parentheses following EUC-KR has only
] one of two character sets convered by the encoding, KS C 5601-1992,
] leaving out KS C 5636-1993/US-ASCII while those following EUC-JP contain
] all three character sets covered by that encoding, JIS X 0201,JIS X
] 0208, and JIS X 0212. As you know well, EUC-KR(encoding) is not
] equivalent to KS C 5601-1992(character set) and I'm concerned this
] diagram gives the false impression that they're equivalent. The same is
] true of EUC-CN and EUC-TW. EUC-CN is not equivalent to GB 2312-80 but an
] EUC encoding of US-ASCII/GB 1988-80 and GB 2312-80. By the same token,
] EUC-TW covers not only CNS 11643-1992 but also US-ASCII.
] Considering the confusion among many people about the
] distinction(between encoding and character set/character repertoire or
] in terms of RFC 2130, CES and CCS), I guess it's important to make this
] point as clear as possible to avoid perpetuation of this unfortunate
] Jungshik Shin
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