[MinGW-Notify] [mingw] #39687: wcsrtombs with NULL dest pointer doesn't ignore len parameter

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Fri Mar 20 06:42:30 JST 2020


#39687: wcsrtombs with NULL dest pointer doesn't ignore len parameter

  Open Date: 2019-10-19 17:38
Last Update: 2020-03-19 21:42

URL for this Ticket:
    https://osdn.net//projects/mingw/ticket/39687
RSS feed for this Ticket:
    https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=39687

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Last Changes/Comment on this Ticket:
2020-03-19 21:42 Updated by: keith

Comment:

Due to my misinterpretation of Microsoft's documentation, the mingwrt-5.3
implementation of btowc() may incorrectly return 0xFFFD, when it should return
WEOF, if the byte to be converted is not valid as a single byte character in
the active codeset. This is corrected, in the repository, for whenever
mingwrt-5.3.1 is published.



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Ticket Status:

      Reporter: gallickgunner
         Owner: keith
          Type: Issues
        Status: Open [Owner assigned]
      Priority: 5 - Medium
     MileStone: (None)
     Component: WSL
      Severity: 5 - Medium
    Resolution: None
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Ticket details:

I'm using MinGW-gcc-6.3.0. The wcsrtombs() function as mentioned in the docs on
cppreference should return the number of bytes that would have been written to
src. However it doesn't do so on my end. It seems the implementation doesn't
ignore the length parameter when dest is passed as NULL? A similar issue was
reported and presumably fixed for the Mingw-w64 on the sourceforge site
Currently working around by passing INT_MAX as the length parameter, so it
finishes within the limit and returns the size.

I apologize in advance if this is just an issue from my end or if any other
info is missing. First time submitting a ticket :)



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URL for this Ticket:
    https://osdn.net/projects/mingw/ticket/39687
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