[SOLVED] how to use QRegExp to find some continue spaces?

[silent_missile]

I have a string
@
178542 5 5 5 0 1447 33386 1452 1452 44585 44631 1452 44576
@
in the sample it has 13 sections, in the real work, it may contain different sections

in the sample, one section contains 8 characters, and each section starts by space including the first section, so the string starts by space.

I need to output a string in the same format, so I need to find how long each section is.

I tried to use QRegExp, my idea is that: the start position of the 2nd continue spaces is the length of 1st section. Then I tried:
@
position=QRegExp("\s+").indexIn(str,1);
@
but I failed, it returns 0 which is the start of the 1st continue spaces. Then I tried to use
@
qDebug()<<rx.pos();
@
to find the 2nd/3rd/4th match, but every one returns -1 which means no match.

I feel confused, it seems that QRegExp works not the same as other regular expression tool. Can any one help me?

[MuldeR]

Why not simply do:
@QStringList list = str.split(" ", QString::SkipEmptyParts);@

Now you have a list containing only the parts between the spaces, so you can easily walk through the list and check QString::length() of each part...

I think the same can be done with with RegExp, but I would use QRegExp("\S+") with an upper case S, which matches only characters that are not whitespaces. Then you could do:
@QRegExp reg("\S+")
int pos = reg.indexIn(str, 0);
while(pos >= 0)
{
int len = reg.cap(0).length(); //This returns the length of each part
pos = reg.indexIn(str, pos+1);
}@

Still I think QString::split() is more straight forward here...

[ChrisW67]

So you have numbers right justified in fixed width columns and you want to work out the widths of the columns, which includes the leading spaces.

@
QString line(" 178542 5 5 5 0 1447 33386 1452 1452 44585 44631 1452 44576");

QList<int> widths;
QRegExp re("\s+\S+");
int pos = 0;
while ((pos = re.indexIn(line, pos)) != -1) {
widths << re.matchedLength();
pos += re.matchedLength();
}
qDebug() << widths;
// (12, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8)
@

Of course, it won't work if some of the columns are "empty" or if the column can contain spaces.