public static int compress2(byte[] dest, ref int destLen, byte[] source, int sourceLen, int level)
{
z_stream_s stream = new z_stream_s();
int err = 0;
int max = int.MaxValue;
int left = destLen;
err = (int)Deflate.deflateInit_(stream, level, "1.2.11");
if (err != 0)
{
return(err);
}
stream.next_out = dest;
stream.avail_out = 0;
stream.next_in = source;
stream.avail_in = 0;
do
{
if (stream.avail_out == 0)
{
stream.avail_out = left > ((int)max) ? max : left;
left -= (int)stream.avail_out;
}
if (stream.avail_in == 0)
{
stream.avail_in = sourceLen > ((int)max) ? max : sourceLen;
sourceLen -= (int)stream.avail_in;
}
err = (int)Deflate.deflate(stream, sourceLen != 0 ? 0 : 4);
}while (err == 0);
destLen = stream.total_out;
Deflate.deflateEnd(stream);
return(err == 1 ? 0 : err);
}