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/* In UTF-8 locales, use a Unicode aware width function. */
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const char *encoding = locale_charset ();
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if (STREQ (encoding, "UTF-8", 'U', 'T', 'F', '-', '8', 0, 0, 0 ,0))
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/* We assume that in a UTF-8 locale, a wide character is the same as a
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return uc_width (wc, encoding);