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Today's Topics:
1. [mingw] #39687: wcsrtombs with NULL dest pointer doesn't
ignore len parameter (MinGW Notification List)
2. [mingw] #39687: wcsrtombs with NULL dest pointer doesn't
ignore len parameter (MinGW Notification List)
----------------------------------------------------------------------
Message: 1
Date: Thu, 24 Oct 2019 16:14:21 +0900
From: MinGW Notification List <[email protected]>
To: OSDN Ticket System <[email protected]>
Subject: [MinGW-Notify] [mingw] #39687: wcsrtombs with NULL dest
pointer doesn't ignore len parameter
Message-ID: <[email protected]>
Content-Type: text/plain; charset=UTF-8
#39687: wcsrtombs with NULL dest pointer doesn't ignore len parameter
Open Date: 2019-10-20 02:38
Last Update: 2019-10-24 16:14
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
---------------------------------------------------------------------
Last Changes/Comment on this Ticket:
2019-10-24 16:14 Updated by: gallickgunner
Comment:
Reply To keith
Thanks for bringing this to my attention. Yes, there are issues with the
MinGW implementations of wcsrtombs(), and the related wcrtomb() functions.
They go far beyond this mishandling of a NULL pointer destination in
wcsrtombs(); in particular, they fail to defer to the Microsoft
implementations, which were first introduced by MSVCR80.DLL, and
subsequently retrofitted to MSVCRT.DLL in Vista, in addition to both being
non-conforming (to ISO-C99), w.r.t. handling of a NULL destination pointer.
I'll look into providing conforming implementations, for mingwrt-5.3 —
these are runtime library issues, not issues with GCC itself. In the
meantime, it would be helpful if you can provide a SSCCE to both
demonstrate the issue, and test any potential solution.
Thanks didn't know it was the runtime library issue. Anyways I'd be happy to
post a code example. Is a simple concise main.cpp enough?
---------------------------------------------------------------------
Ticket Status:
Reporter: gallickgunner
Owner: keith
Type: Issues
Status: Open [Owner assigned]
Priority: 5 - Medium
MileStone: (None)
Component: WSL
Severity: 5 - Medium
Resolution: None
---------------------------------------------------------------------
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 :)
--
Ticket information of MinGW - Minimalist GNU for Windows project
MinGW - Minimalist GNU for Windows Project is hosted on OSDN
Project URL: https://osdn.net/projects/mingw/
OSDN: https://osdn.net
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
------------------------------
Message: 2
Date: Thu, 24 Oct 2019 11:44:44 +0100
From: MinGW Notification List <[email protected]>
To: OSDN Ticket System <[email protected]>
Subject: [MinGW-Notify] [mingw] #39687: wcsrtombs with NULL dest
pointer doesn't ignore len parameter
Message-ID: <[email protected]>
Content-Type: text/plain; charset=UTF-8
#39687: wcsrtombs with NULL dest pointer doesn't ignore len parameter
Open Date: 2019-10-19 18:38
Last Update: 2019-10-24 11:44
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
---------------------------------------------------------------------
Last Changes/Comment on this Ticket:
2019-10-24 11:44 Updated by: keith
Comment:
Reply To gallickgunner
I'd be happy to post a code example. Is a simple concise main.cpp enough?
Yes. Short and sweet is the order of the day. Concise is good ... provided it
is sufficient to illustrate the fault, and can subsequently be used to show
that any proposed solution is effective.
---------------------------------------------------------------------
Ticket Status:
Reporter: gallickgunner
Owner: keith
Type: Issues
Status: Open [Owner assigned]
Priority: 5 - Medium
MileStone: (None)
Component: WSL
Severity: 5 - Medium
Resolution: None
---------------------------------------------------------------------
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 :)
--
Ticket information of MinGW - Minimalist GNU for Windows project
MinGW - Minimalist GNU for Windows Project is hosted on OSDN
Project URL: https://osdn.net/projects/mingw/
OSDN: https://osdn.net
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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