/// <exception cref="System.IO.IOException"></exception>
public override void Write(byte[] b, int off, int len)
{
if (len == 0)
{
return;
}
int err;
z.next_in = b;
z.next_in_index = off;
z.avail_in = len;
do
{
z.next_out = buf;
z.next_out_index = 0;
z.avail_out = bufsize;
if (compress)
{
err = z.Deflate(flush);
}
else
{
err = z.Inflate(flush);
}
if (err != JZlib.Z_OK)
{
throw new ZStreamException((compress ? "de" : "in") + "flating: " + z.msg);
}
@out.Write(buf, 0, bufsize - z.avail_out);
}while (z.avail_in > 0 || z.avail_out == 0);
}
/// <exception cref="System.IO.IOException"></exception>
public override int Read(byte[] b, int off, int len)
{
if (len == 0)
{
return(0);
}
int err;
z.next_out = b;
z.next_out_index = off;
z.avail_out = len;
do
{
if ((z.avail_in == 0) && (!nomoreinput))
{
// if buffer is empty and more input is avaiable, refill it
z.next_in_index = 0;
z.avail_in = @in.Read(buf, 0, bufsize);
//(bufsize<z.avail_out ? bufsize : z.avail_out));
if (z.avail_in == -1)
{
z.avail_in = 0;
nomoreinput = true;
}
}
if (compress)
{
err = z.Deflate(flush);
}
else
{
err = z.Inflate(flush);
}
if (nomoreinput && (err == JZlib.Z_BUF_ERROR))
{
return(-1);
}
if (err != JZlib.Z_OK && err != JZlib.Z_STREAM_END)
{
throw new ZStreamException((compress ? "de" : "in") + "flating: " + z.msg);
}
if ((nomoreinput || err == JZlib.Z_STREAM_END) && (z.avail_out == len))
{
return(-1);
}
}while (z.avail_out == len && err == JZlib.Z_OK);
//System.err.print("("+(len-z.avail_out)+")");
return(len - z.avail_out);
}
internal int DeflateParams(ZStream strm, int _level, int _strategy)
{
int err = Z_OK;
if (_level == Z_DEFAULT_COMPRESSION)
{
_level = 6;
}
if (_level < 0 || _level > 9 || _strategy < 0 || _strategy > Z_HUFFMAN_ONLY)
{
return Z_STREAM_ERROR;
}
if (config_table[level].func != config_table[_level].func && strm.total_in != 0)
{
// Flush the last buffer:
err = strm.Deflate(Z_PARTIAL_FLUSH);
}
if (level != _level)
{
level = _level;
max_lazy_match = config_table[level].max_lazy;
good_match = config_table[level].good_length;
nice_match = config_table[level].nice_length;
max_chain_length = config_table[level].max_chain;
}
strategy = _strategy;
return err;
}
