GZip in Blackberry 10 - blackberry-10

Question

Hi I am new to blackberry 10 platform. I am developing an application to unzip files compressed using GZip. I am looking for extracting folder that compressed with GZip.

Answer 1

I have the same problem and I solved this problem by adding the following method
gUncompress(const QByteArray &data)
{
qDebug()<<"Reached Guncompress";
qDebug()<<"size="<<data.size();
if (data.size() <= 4) {
qWarning("gUncompress: Input data is truncated");
return QByteArray();
}
QByteArray result;
int ret;
z_stream strm;
static const int CHUNK_SIZE = 1024;
char out[CHUNK_SIZE];
/* allocate inflate state */
strm.zalloc = Z_NULL;
strm.zfree = Z_NULL;
strm.opaque = Z_NULL;
strm.avail_in = data.size();
strm.next_in = (Bytef*)(data.data());
ret = inflateInit2(&strm, 15 + 32); // gzip decoding
if (ret != Z_OK)
return QByteArray();
// run inflate()
do {
strm.avail_out = CHUNK_SIZE;
strm.next_out = (Bytef*)(out);
ret = inflate(&strm, Z_NO_FLUSH);
Q_ASSERT(ret != Z_STREAM_ERROR); // state not clobbered
switch (ret) {
case Z_NEED_DICT:
ret = Z_DATA_ERROR; // and fall through
case Z_DATA_ERROR:
case Z_MEM_ERROR:
(void)inflateEnd(&strm);
return QByteArray();
}
result.append(out, CHUNK_SIZE - strm.avail_out);
} while (strm.avail_out == 0);
// clean up and return
inflateEnd(&strm);
return result;
}
I think this will solve your problem