On Fri, 2018-08-24 at 11:18 +0100, Daniel P. Berrangé wrote:
On Fri, Aug 24, 2018 at 12:10:47PM +0200, Michal Privoznik wrote:
> On 08/24/2018 11:36 AM, Daniel P. Berrangé wrote:
> > On Fri, Aug 24, 2018 at 10:59:04AM +0200, Michal Privoznik wrote:
> > > On 08/23/2018 05:53 PM, Simon Kobyda wrote:
> > > > Created new API for priting tables, mainly to solve alignment
> > > > problems.
> > > > Implemented these test to virsh list. In the future, API may
> > > > be
> > > > everywhere in virsh and virt-admin.
> > > > Also wrote basic tests for the new API, and corrected tests
> > > > in virshtest
> > > > which are influenced by implementation of the API in virsh
> > > > list.
> > > >
> > > > Changes in v5:
> > > > - cleanup and merged code for calculating zero-width,
> > > > nonprintable and combined
> > > > character.
> > > > - replaced virBufferAddStr with virBufferAddChar in some
> > > > places
> > > > - in tests moved code for setting correct locale
> > > > - fixed few leaks and unitialized values
> > > >
> > > > Changes in v4:
> > > > - fixed width calculation for zero-width, nonprintable and
> > > > combined
> > > > character. (pulled some code from linux-util)
> > > > - added tests for cases mentioned above
> > > > - changed usage of vshControl variables. From now on
> > > > PrintToStdout calls
> > > > PrintToString and then prints returned string to stdout
> > > >
> > > > Changes in v3:
> > > > - changed encoding of 3/3 patch, otherwise it cannot be
> > > > applied
> > > >
> > > > Changes in v2:
> > > > - added tests
> > > > - fixed alignment for unicode character which span more
> > > > spaces
> > > > - moved ncolumns check to vshTableRowAppend
> > > > - changed arguments for functions vshTablePrint,
> > > > vshTablePrintToStdout,
> > > > vshTablePrintToString
> > > >
> > > > Simon Kobyda (3):
> > > > vsh: Add API for printing tables.
> > > > virsh: Implement new table API for virsh list
> > > > vsh: Added tests
> > > >
> > > > tests/Makefile.am | 8 +
> > > > tests/virshtest.c | 14 +-
> > > > tests/vshtabletest.c | 377
> > > > +++++++++++++++++++++++++++++
> > > > tools/Makefile.am | 4 +-
> > > > tools/virsh-domain-monitor.c | 43 ++--
> > > > tools/vsh-table.c | 449
> > > > +++++++++++++++++++++++++++++++++++
> > > > tools/vsh-table.h | 42 ++++
> > > > 7 files changed, 910 insertions(+), 27 deletions(-)
> > > > create mode 100644 tests/vshtabletest.c
> > > > create mode 100644 tools/vsh-table.c
> > > > create mode 100644 tools/vsh-table.h
> > > >
> > >
> > > ACKed and pushed.
> > >
> > > Now we can start converting the rest of the code to use
> > > vshTable APIs.
> >
> > But first fix the build failures :-)
> >
> > On CentOS / RHEL:
> >
> >
https://travis-ci.org/libvirt/libvirt/jobs/420024141
> >
> >
> > 4)
> > testUnicode
> > ...
> > Offset 30
> > Expect [государство
> > -----------------------------------------
> > 1 fedora28 running
> > 2 🙊🙉🙈rhel7.5🙆🙆🙅]
> > Actual
> > [
> > государство
> > ---------------------------------------------------------------
> > --------------------------------------------------------------
> > 1 fedora28
> > running
> > 2 \xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xffrhel7.5\xff
> > \xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff]
> >
>
> Okay, this is probably due to ancient gcc that's there (4.8.0) and
> is
> supposed to be fixed by adding -finput-charset= onto gcc command
> line.
> Haven't tested it though.
>
> >
> >
> > On Mingw:
> >
> >
https://travis-ci.org/libvirt/libvirt/jobs/420024142
> >
> > vsh-table.c: In function 'vshTableSafeEncode':
> > vsh-table.c:274:27: error: implicit declaration of function
> > 'wcwidth' [-Werror=implicit-function-declaration]
> > *width += wcwidth(wc);
> > ^~~~~~~
> > vsh-table.c:274:27: error: nested extern declaration of 'wcwidth'
> > [-Werror=nested-externs]
>
> But this is weird. wcwidth() manpage says to include wchar.t which
> we
> are doing. Maybe _XOPEN_SOURCE macro is not defined?
It is quite simple - the function doesn't exist on mingw :-)
$ grep -r wcwidth /usr/i686-w64-mingw32/sys-root/mingw/include/
...nothing...
Looks like gnulib can rescue us though
https://www.gnu.org/software/gnulib/manual/html_node/wcwidth.html
Regards,
Daniel
So I've looked it up and perhaps found something. Function iswprint
(which is the root of our problem) is provided by glibc. CentOS 7 uses
glibc 2.17, which was released in December 2017. I looked into
ChangeLog of that version and I see they added table (or map?) for
their nonascii symbols in 2009. Unicodes I used in tests (monkeyfaces)
were added in 2010 in Unicode 6.0. So those specific unicodes therefore
didn't find their way into nonascii table of glibc 2.17. :).
I suspect the case is similar for RHEL.
Btw. iswprint is using that table to determine whetever character is
printable or not.
Simon Kobyda.