[Lilypond-auto] [LilyIssues-auto] [testlilyissues:issues] #5833 Fix MinGW UTF-8 locale settings

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[issues:#5833] Fix MinGW UTF-8 locale settings

Status: Started
Created: Sat Mar 07, 2020 04:22 PM UTC by Masamichi Hosoda
Last Updated: Fri Mar 13, 2020 11:15 AM UTC
Owner: Masamichi Hosoda

Issue 5833/3: Doc: Add handling Unicode filenames on Windows to changes

Issue 5833/2: Add workaround for MinGW UTF-8 stat issue

When UTF-8 process locale is active,
LilyPond could not find some Unicode filenames.

stat () in msvcrt.dll returns -1 (i.e. error) with some UTF-8
filenames even if process code page is UTF-8 and the file exists.
So we get the process code page with GetACP () and, if it is UTF-8,
convert the filename to wide strings and use _wstat ().

If Universal CRT (UCRT, newer than msvcrt.dll) is used
(i.e. _UCRT is defined), no such workaround is needed.

Issue 5833/1: Add workaround for MinGW UTF-8 locale settings issue

Issue 2173 and 5828 activates UTF-8 process locale on Windows.
They allow LilyPond for Windows to use Unicode filenames.
However, when LilyPond outputs Unicode strings to tty, it garbled.

setlocale (LC_ALL, "") in msvcrt.dll sets user-defined ANSI code page
(i.e. 437 for English, 932 for Japanse, etc.)
even if process code page is UTF-8 (i.e. 65001 for all languages).
With this setting, outputting UTF-8 string becomes garbled.
So we get the process code page with GetACP () and,
if it is UTF-8, explicitly set locale's code page to UTF-8 (i.e. 65001).

If Universal CRT (UCRT, newer than msvcrt.dll) is used
(i.e. `_UCRT' is defined), no such workaround is needed.

http://codereview.appspot.com/551580045

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