private int table; // table lengths (14 bits)
#endregion Fields
#region Constructors
internal InflateBlocks(ZlibCodec codec, object checkfn, int w)
{
this.Codec = codec;
this.hufts = new int[Many * 3];
this.Window = new byte[w];
this.End = w;
this.checkfn = checkfn;
this.mode = InflateBlockMode.Type;
this.Reset();
}
/// <param name="codec">
/// </param><param name="w"></param>
/// <returns></returns> <exception cref = "ZlibException"></exception>
internal int Initialize(ZlibCodec codec, int w)
{
this.codec = codec;
this.codec.Message = null;
this.blocks = null;
// handle undocumented nowrap option (no zlib header or check) nowrap = 0; if (w < 0) { w = - w; nowrap = 1;
// }
// set window size
if (w < 8 || w > 15)
{
this.End();
throw new ZlibException("Bad window size.");
// return ZlibConstants.Z_STREAM_ERROR;
}
this.wbits = w;
this.blocks = new InflateBlocks(codec, this.HandleRfc1950HeaderBytes ? this : null, 1 << w);
// reset state
this.Reset();
return ZlibConstants.Zok;
}
private void End()
{
if (this.Z == null)
{
return;
}
if (this.WantCompress)
{
this.ZlibCodec.EndDeflate();
}
else
{
this.ZlibCodec.EndInflate();
}
this.ZlibCodec = null;
}
/// <param name="nl"></param><param name="nd"></param> <param name="c"></param><param name="bl"></param>
/// <param name="bd"></param><param name="tl"></param> <param name="td"></param><param name="hp"></param><param name="z"></param><returns></returns>
internal int InflateTreesDynamic(
int nl, int nd, int[] c, int[] bl, int[] bd, int[] tl, int[] td, int[] hp, ZlibCodec z)
{
// build literal/length tree
this.InitWorkArea(288);
this.hufts[0] = 0;
int result = this.HuftBuild(c, 0, nl, 257, Cplens, Cplext, tl, bl, hp, this.hufts, this.workArea);
if (result != Zok || bl[0] == 0)
{
if (result == ZDataError)
{
z.Message = "oversubscribed literal/length tree";
}
else if (result != ZMemError)
{
z.Message = "incomplete literal/length tree";
result = ZDataError;
}
return result;
}
// build distance tree
this.InitWorkArea(288);
result = this.HuftBuild(c, nl, nd, 0, Cpdist, Cpdext, td, bd, hp, this.hufts, this.workArea);
if (result != Zok || (bd[0] == 0 && nl > 257))
{
if (result == ZDataError)
{
z.Message = "oversubscribed distance tree";
}
else if (result == ZBufError)
{
z.Message = "incomplete distance tree";
result = ZDataError;
}
else if (result != ZMemError)
{
z.Message = "empty distance tree with lengths";
result = ZDataError;
}
return result;
}
return Zok;
}
/// <param name="c"></param><param name="bb"></param> <param name="tb"></param><param name="hp"></param><param name="z"></param><returns></returns>
internal int InflateTreesBits(int[] c, int[] bb, int[] tb, int[] hp, ZlibCodec z)
{
this.InitWorkArea(19);
this.hufts[0] = 0;
int result = this.HuftBuild(c, 0, 19, 19, null, null, tb, bb, hp, this.hufts, this.workArea);
if (result == ZDataError)
{
z.Message = "oversubscribed dynamic bit lengths tree";
}
else if (result == ZBufError || bb[0] == 0)
{
z.Message = "incomplete dynamic bit lengths tree";
result = ZDataError;
}
return result;
}
public void ChangeDataToRead(int size)
{
nomoreinput = false;
DataToRead = size;
_z = null;
}