Fork#39687: wcsrtombs with NULL dest pointer doesn't ignore len parameter
Open Date: 2019-10-19 17:38
Last Update: 2019-11-11 23:39
URL for this Ticket:
https://osdn.net//projects/mingw/ticket/39687
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Last Changes/Comment on this Ticket:
2019-11-11 23:39 Updated by: keith
Comment:
I feared that this may prove to be the case: if I run that same test case,
which succeeded under wine, in a native Win7 virtual machine, it fails:
$ LC_CTYPE="English_United Kingdom.65001" /e/tc39687.exe
Locale: C
Verified input length: 0; Illegal byte sequence
I suspect that the problem arises from an unfortunate — but documented —
limitation of Microsoft's setlocale() implementation; it is unable to process
locale specifications in which the codeset element refers to any with an
MB_CUR_MAX of greater than two bytes, (which precludes UTF-8 — code page 65001
— amongst a significant number of others).
I shall continue to explore possible work-arounds.
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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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