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371367ce3e
Ine2459857af, I combined mbstring's "SJIS-win" text encoding into CP932. This was done after doing some testing which appeared to show that the mappings for "SJIS-win" were the same as those for "CP932". Later, it was found that there was actually a small difference prior toe2459857afwhen converting Unicode to CP932. The mappings for the following two codepoints were different: CP932 SJIS-win U+203E 0x7E 0x81 0x50 U+00A5 0x5C 0x81 0x8F As shown, mbstring's "CP932" mapped Unicode's 'OVERLINE' and 'YEN SIGN' to the ASCII bytes which have conflicting uses in most legacy Japanese text encodings. "SJIS-win" mapped these to equivalent JIS X 0208 fullwidth characters. Since e2459867af was not intended to cause any user-visible change in behavior, I am rolling back the merge of "CP932" and "SJIS-win". It seems doubtful whether these two text encodings should be kept separate or merged in a future release. An extensive discussion of the related historical background and compatibility issues involved can be found in this GitHub thread: https://github.com/php/php-src/issues/8308