public override int Read(byte[] b, int off, int len)
{
if (len == 0)
{
return(0);
}
z.next_out = b;
z.next_out_index = off;
z.avail_out = len;
int err;
do
{
if (z.avail_in == 0 && !nomoreinput)
{
// if buffer is empty and more input is available, refill it
z.next_in_index = 0;
z.avail_in = input.Read(buf, 0, buf.Length); //(bufsize<z.avail_out ? bufsize : z.avail_out));
if (z.avail_in <= 0)
{
z.avail_in = 0;
nomoreinput = true;
}
}
err = compress
? z.deflate(flushLevel)
: z.inflate(flushLevel);
if (nomoreinput && err == JZlib.Z_BUF_ERROR)
{
return(0);
}
if (err != JZlib.Z_OK && err != JZlib.Z_STREAM_END)
{
// TODO
// throw new ZStreamException((compress ? "de" : "in") + "flating: " + z.msg);
throw new IOException((compress ? "de" : "in") + "flating: " + z.msg);
}
if ((nomoreinput || err == JZlib.Z_STREAM_END) && z.avail_out == len)
{
return(0);
}
}while(z.avail_out == len && err == JZlib.Z_OK);
//Console.Error.WriteLine("("+(len-z.avail_out)+")");
return(len - z.avail_out);
}
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;
err = z.deflate(flush);
if (err != JZlib.Z_OK)
{
throw new IOException("deflating: " + z.msg);
}
outp.Write(buf, 0, BUFSIZE - z.avail_out);
}while(z.avail_in > 0 || z.avail_out == 0);
}
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;
}
