Bug 179549

Description of problem:

We're using a UTF-8 locale and have a modify verify callback on our XmTextField
widgets.  In this environment selecting text and pasting it into an XmTextField
is unreliable:  sometimes nothing happens and sometimes garbage is appended to
the pasted text.  Everything works properly in the C locale or if there's no
modify verify callback.

Running the application under valgrind shows a couple of memory problems related
to the issue:

In TextFSel.c, around line 1100, the array wc_value is one character too short.

In TextF.c, around line 2934, the size of the array insert_orig is specified
using tf->text.max_char_size, whereas the documentation indicates that insert is
an array of wchar_t.  In our UTF-8 locale tf->text.max_char_size is 6 while
sizeof(wchar_t) is 4, so the bcopy at line 2935 is fetching data from beyond the
end of the array insert.

I've produced a patch which I think fixes these issues.  With this patch we can
paste text into our application reliably and valgrind is happy.


Version-Release number of selected component (if applicable):

2.2.3-9.RHEL4.1, though other versions are affected


How reproducible:


Steps to Reproduce:
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Actual results:


Expected results:


Additional info:

I've raised this issue upstream at:

   http://bugs.motifzone.net/show_bug.cgi?id=1321