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wordcraft/docs
midasdf 2d645dba03 #1653: RTF import decodes the East Asian multibyte code pages
`\ansicpg932`/`936`/`949`/`950`, a font's `\fcharset128`/`129`/`134`/`136`,
`\cpg932` and the OEM charset 255 were read one byte at a time, so Japanese,
Korean and Chinese text came out as mojibake. The reader now holds the 8-bit
text of a multibyte code page and decodes the run with encoding_rs (SHIFT_JIS,
GBK, EUC_KR/UHC, BIG5): a lead byte and its trail byte decode together, escaped
(`\'hh`) or raw. A code page switch (`\f`, `\fcharset`, `\cpg`, `\ansicpg`), a
group end and the end of the document flush what is pending; invalid sequences
read as U+FFFD, as Word writes them, and never lose the rest of the text. The
pending buffer is capped at 4096 bytes.

Single-byte code pages, `\uN?` escapes and their `\ucN` skips, the font table
and every existing test are unchanged. Tests cover Shift-JIS (escaped, raw and
through a `\fcharset128` font), CP949/CP936/CP950, a mixed Japanese/ASCII/
Cyrillic document whose code-page switch must flush, `\uN?` alongside
multibyte text, an invalid sequence and a Windows-1252 regression.
2026-10-20 13:35:52 +09:00
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