Fix 'updpos()' and 'updateline()' functions for UTF-8 characters

torvalds / uemacs

Random version of microemacs with my private modificatons

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Closed jianwang-qau closed 5 years ago

jianwang-qau commented 5 years ago

When deal with multibyte UTF-8 characters, these functions DO NOT correctly calculate the display width of the characters.