open/write gzipped file

[Brandybuck]

zlib is fairly lightweight, you may want to try it. http://www.zlib.net/. This is the same compression library that Qt uses, but it doesn't expose the gzip functionality.

[niko]

i was thinking about that too.
but where to start?
could you give me some hints?

(i have almost no c++ experience)

thanks
niko

[Brandybuck]

zlib is C, not C++. I have never used it directly. My first step would be to read its documentation and look at any example programs. You may also want to look at the qCompress sources to see how Trolltech uses it.

[niko]

hooray, it works

this is how I did it:

gzFile file;
file = gzopen (fileName.toUtf8().data(), "rb");
if(!file) {
	QMessageBox::critical(0, tr("import"), tr("Can't open file"));
	return;
}
QByteArray input;
char buffer[1024];
QByteArray inputData;
while(int readBytes =  gzread (file, buffer, 1024))
 {
	input.append(QByteArray(buffer, readBytes));
}
gzclose(file);

gzFile file;
file = gzopen (fileName.toUtf8().data(), "rb");
if(!file) {
	QMessageBox::critical(0, tr("import"), tr("Can't open file"));
	return;
}
QByteArray input;
char buffer[1024];
QByteArray inputData;
while(int readBytes =  gzread (file, buffer, 1024))
 {
	input.append(QByteArray(buffer, readBytes));
}
gzclose(file);

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thanks for the help....

niko