Solved: Regex expression ?? <tag>...</tag>

SherifOmran

Hello guys,
I am trying to catch a string from inside another string. The string to be catched is as follows:

I want to catch the some text. Could you please help me with the regexp?

I tried the following but does not work

@
QString output="embed'><line>نتمكيبسشبسشكنتمنسيشم";

QRegExp exp ("<line>.*</spin>");
int index = exp.indexIn(output);
qDebug () << "regexp" << output << "index=" &lt;&lt; index;

QStringList lineslist;
QString linestr;
while (index &gt;= 0) {
    int length = exp.matchedLength();
    linestr=output.mid(index,length);
    qDebug() &lt;&lt; "linestring = " << linestr;
    lineslist.append(linestr);
    index = exp.indexIn(output, index + length);
}

@

N3Roaster

You have in your string instead of </spin> or you have </spin> in your regex instead of .

SherifOmran

writing mistake, it is .. thank you for the note. I fixed it
@
QRegExp [removed]"<line>.*");
@

how ever this does get all the text for example, if i have <line> ..... <span1>

It produces all the text till the last but i need the first after the <line> tag

Wurstinator

I don't know if Qt supports it, but .*? is a non-greedy expression which should be what you are searching for.

N3Roaster

You want the setMinimal() method in QRegExp.

SherifOmran

thank you guys, i found i

@
QRegExp [removed]"<line>[^<]*");
@

But this outputs ex:
"<line>بببببببببيب"

is it possible to trim the <line> and the in the same expression?
to spare an extra line QString.mid ...

N3Roaster

See the section in the QRegExp documentation on capturing text. The first paragraph shows how you can replace the call to mid with a call to exp.cap(). Alternately you could adjust the parameters on the call to mid since you want to strip out fixed length segments at the ends.

andre

Wouldn't it make much more sense to use a real parser, like the XML module in Qt? RegExps are useful, but they are a poor substitute for parsers. What happens, for example, if your input text has multiple pairs? What if these are nested?

SherifOmran

Andre: thank you for your comment, however it does not need an xml parser, since i don't have multiple nested tags. Just only <line> and the required text is till the next first

Guys,

I have the string now in the ascii format, I need to convert it to the QString type so that i can match the characters with each pressed key in my game.

@"نتمك" @

Edited: these vaues after &# are decimal representation of unicode values

SherifOmran

can somebody help me in the last point?

I need to split the numbers, convert each to hex

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int a1 = 1606;
QString b = QString::number( a1 , 16 ); // b=0628
@

put \x before and after the 2nd digit to get \x06\28

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QString test1 = QString::fromUtf8("\x06\x28"); // è encoded in UTF8
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is there an easier way to do it?