Re: [xml] XPath Fix (part 1)

[Daniel Veillard <veillard redhat com>]

On Tue, Mar 26, 2002 at 03:49:36PM -0000, Richard Jinks wrote:
> Hi
>
> Attached is the patch file for the first set of fixes for XPath.
> As mentioned earlier, these cover -
>
> > I've added two new functions to trionan.c to check / set the sign of a
> > double
> > (VC++6 doesn't like double a=-0.0 as Bjorn suggested, so I put a function
> in
> > to set it).
> > I've also made the mods to the XPath math functions so they return -0 in
> the
> > correct places, and does floating point mods.
> > As a temporary fix, I've modified xmlXPatherror so that it doesn't report
> > the filename / line number

   Applied, but they're aren't very clean :-)

gcc -DHAVE_CONFIG_H -I. -I. -I. -I./include -I./include -g -O -pedantic -W -Wunused -Wimplicit -Wreturn-type 
-Wswitch -Wcomment -Wtrigraphs -Wformat -Wchar-subscripts -Wuninitialized -Wparentheses -Wshadow 
-Wpointer-arith -Wcast-align -Wwrite-strings -Waggregate-return -Wstrict-prototypes -Wmissing-prototypes 
-Wnested-externs -Winline -Wredundant-decls -Wp,-MD,.deps/xpath.pp -c xpath.c -o xpath.o
xpath.c:4778:2: warning: C++ style comments are not allowed in ISO C89
xpath.c:4778:2: warning: (this will be reported only once per input file)
xpath.c:159: warning: no previous prototype for `xmlXPathGetSign'
xpath.c: In function `xmlXPatherror':
xpath.c:1278: warning: unused parameter `file'
xpath.c:1279: warning: unused parameter `line'

  I will have to do a bit of cleanup it seems ...

> I generated the patch file by running "cvs -z3 diff -c" as suggested, and it
> put the changes for both files in the one output file. Is this alright, or

  That's allright !

> WRT the changes to trionan.c -
> The two new functions (trio_get_sign() and trio_nzero()) are protected by
> the #if defined (USE_IEEE754) guard.
> I'm afraid that someone else will need to look into a more generic
> implementation of these two functions as I can't get hold of any platforms
> that don't go through this guard to test on.
> My understanding of different hardware and floating point maths isn't good
> enough to warrant trying
> to guess what might work. I would need to call upon some outside assistance
> to help with this.

  BTW trio is actually imported from a separate project, Bjorn is the
one maintaining this code.

Daniel

-- 
Daniel Veillard      | Red Hat Network https://rhn.redhat.com/
veillard redhat com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
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