[issue12568] Add functions to get the width in columns of a character

[STINNER Victor]

STINNER Victor <victor.stinner at haypocalc.com> added the comment:

Oh, unicode_width.patch of issue #2382 implements the width on Windows using:

WideCharToMultiByte(CP_ACP, 0, buf, len, NULL, 0, NULL, NULL);

It computes the length of byte string encoded to the ANSI code page. I don't know if it can be seen as the "width" of a character string in the console...

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<http://bugs.python.org/issue12568>
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