[Octave-bug-tracker] [bug #58368] UTF16 and UTF32 characters in MAT files

[Markus Mützel]

Update of bug #58368 (project octave):

                  Status:                    None => Patch Submitted        

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Follow-up Comment #3:

Thanks Guillaume for testing.
The attached patch saves character arrays as UTF-8 to .mat files (-v6 and
-v7). With it, a save-load-cycle seems to work fine in Octave.
Also Matlab seems to accept loading .mat files with UTF-8 encoded strings.
(Tested with Matlab R2020a). However, they seem to get the string length wrong
for strings with multi-byte characters. See the trailing 0 for "Réunion" in
Matlab when loading the file saved by Octave:

>> double(A{14})

ans =

    82   233   117   110   105   111   110     0


I'd say this is a Matlab bug. But we could work around it by converting our
strings to UTF-16 before writing to the .mat file.

(file #49093)
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Additional Item Attachment:

File name: bug58368_utf_mat_v2.patch      Size:8 KB
    <https://savannah.gnu.org/file/bug58368_utf_mat_v2.patch?file_id=49093>



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