Hello!
On Wed, May 21, 2008 at 10:53:13AM +0200, Michael Hanke wrote:
> On Tue, May 20, 2008 at 11:12:37PM +0200, Philipp Matthias Hahn wrote:
> > Package: qlandkarte
> > Version: 0.7.2~dfsg.1-1
> > Severity: important
> >
> > Upstream-Bug, please forward.
> >
> > Depending on which locale is set when QLandkarte is launched, the saved
> > .gpx files contain differenr number-formats in the @lon and @lat
> > attribute of track-points. For example, Germany uses ',' whilte the USA
> > use '.' as the floatingpoint-delimiter.
> I cannot reproduce this bug, nor can upstream. I tried with your LANG
> settings and I always get '.' as the delimiter. Whatever causes this bug
> on your system seems to be within Qt. Please also see upstream's
> response:
>
> http://sourceforge.net/mailarchive/forum.php?thread_name=20080521053226.GB3492%40localhost&forum_name=qlandkarte-users
It's not the fault of QLandkarte, but Qt4 seams to be broken to use
"printf(%g)" for the conversion of doubles to strings. Please consider
re-assigning this bug to qt4-x11. Nether the less it affects QLandkarte.
$ locale
LANG=de_DE.UTF-8
LC_CTYPE="de_DE.UTF-8"
LC_NUMERIC="de_DE.UTF-8"
LC_TIME="de_DE.UTF-8"
LC_COLLATE="de_DE.UTF-8"
LC_MONETARY="de_DE.UTF-8"
LC_MESSAGES="de_DE.UTF-8"
LC_PAPER="de_DE.UTF-8"
LC_NAME="de_DE.UTF-8"
LC_ADDRESS="de_DE.UTF-8"
LC_TELEPHONE="de_DE.UTF-8"
LC_MEASUREMENT="de_DE.UTF-8"
LC_IDENTIFICATION="de_DE.UTF-8"
LC_ALL=
qt4-x11-4.4.0/src/xml/dom/qdom.cpp:4823
void QDomElement::setAttribute(const QString& name, double value)
{
if (!impl)
return;
QString x;
char buf[256];
int count = qsnprintf(buf, sizeof(buf), "%.16g", value);
$ gdb bin/qlandkarte
(gdb) s
QDomElement::setAttribute (this=0xbfe82550, [EMAIL PROTECTED],
value=53.125089034438133) at dom/qdom.cpp:4825
^
(gdb) n
4829 int count = qsnprintf(buf, sizeof(buf), "%.16g", value);
^^^^^
(gdb) print buf
$14 = "53,12508903443813\000...
^
qt4-x11-4.4.0/src/corelib/tools/qvsnprintf.cpp:77
int qvsnprintf(char *str, size_t n, const char *fmt, va_list ap)
{
if (!str || !fmt)
return -1;
QString buf;
buf.vsprintf(fmt, ap);
qt4-x11-4.4.0/src/corelib/tools/qstring.cpp:4542
QString &QString::vsprintf(const char* cformat, va_list ap)
{
...:4760
case 'g':
...:4780
subst = locale.d()->doubleToString(d, precision, form, width,
flags);
qt4-x11-4.4.0/src/corelib/tools/qlocale.cpp:3601
QString QLocalePrivate::doubleToString(double d,
int precision,
DoubleForm form,
int width,
unsigned flags) const
{
...:3707
num_str = decimalForm(digits, decpt, precision, mode,
always_show_decpt, flags &
ThousandsGroup,
*this);
qt4-x11-4.4.0/src/corelib/tools/qlocale.cpp:3304
static QString &decimalForm(QString &digits, int decpt, uint precision,
PrecisionMode pm,
bool always_show_decpt,
bool thousands_group,
const QLocalePrivate &locale)
{
...:3333
digits.insert(decpt, locale.decimal());
I'll also attach my short test program "dom.cc" to be compiled with
c++ -I/usr/include/qt4 -lQtXml -o dom dom.cc
#include <Qt/qdom.h>
#include <Qt/qlocale.h>
#include <iostream>
#include <locale.h>
int main(int argc, char **argv, char **env) {
double value = 3.1415 + argc;
setlocale(LC_ALL, "");
QLocale::setDefault( QLocale::system() );
QString x;
char buf[256];
int count = qsnprintf(buf, sizeof(buf), "%.16g", value);
if (count > 0) {
x = QString::fromLatin1(buf, count);
std::cout << qPrintable(x) << std::endl;
}
x.setNum(value); // Fallback
std::cout << qPrintable(x) << std::endl;
QDomDocument doc( "root" );
QDomElement root = doc.createElement( "root" );
root.setAttribute( "double", value );
doc.appendChild( root );
QString xml = doc.toString();
std::cout << qPrintable(xml) << std::endl;
return 0;
}
LANG=en_US.UTF-8 ./dom
4.141500000000001
4.1415
<!DOCTYPE root>
<root double="4.141500000000001" />
LANG=de_DE.UTF-8 ./dom
4,141500000000001
4.1415
<!DOCTYPE root>
<root double="4,141500000000001" />
> On this system I'm running qt 4.3. Could you try if the bug also
> occurs with Qt 4.3 instead of 4.4?
I currently don't have access to any machine running Qt 4.3, but if I
find one I'll send another mail with the output of my test programm.
BYtE
Philipp
--
Philipp Matthias Hahn <[EMAIL PROTECTED]>
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