public Decompressor (InputBuffer input, OutputBuffer output)
: base (input, output)
{
/* Check the magic number */
if (((input.ReadByte () & 0xFF) != (Compress.magic_header [0] & 0xFF)) || ((input.ReadByte () & 0xFF) != (Compress.magic_header [1] & 0xFF)))
Console.Error.WriteLine ("stdin: not in compressed format");
maxBits = input.ReadByte (); /* set -b from file */
blockCompress = maxBits & Compress.BLOCK_MASK;
maxBits &= Compress.BIT_MASK;
maxMaxCode = 1 << maxBits;
if (maxBits > Compress.BITS)
Console.Error.WriteLine ("stdin: compressed with " + maxBits + " bits, can only handle " + Compress.BITS + " bits");
bitsNumber = Compress.INIT_BITS;
maxCode = MaxCode;
offset = 0;
size = 0;
clearFlag = 0;
freeEntry = ((blockCompress != 0) ? Compress.FIRST : 256);
tabPrefix = new CodeTable ();
tabSuffix = new SuffixTable ();
deStack = new DeStack ();
/*
* As above, initialize the first 256 entries in the table.
*/
tabPrefix.Clear (256);
tabSuffix.Init (256);
}
public CompBase (InputBuffer input, OutputBuffer output)
{
this.input = input;
this.output = output;
maxBits = Compress.BITS;
blockCompress = Compress.BLOCK_MASK;
buf = new byte [Compress.BITS];
}
public Compressor (InputBuffer input, OutputBuffer output)
: base (input, output)
{
if (maxBits < Benchmark.Compress.INIT_BITS)
maxBits = Benchmark.Compress.INIT_BITS;
if (maxBits > Benchmark.Compress.BITS)
maxBits = Benchmark.Compress.BITS;
maxMaxCode = 1 << maxBits;
bitsNumber = Benchmark.Compress.INIT_BITS;
maxCode = MaxCode;
offset = 0;
bytesOut = 3; /* includes 3-byte header mojo */
outCount = 0;
clearFlag = 0;
ratio = 0;
inCount = 1;
checkpoint = CHECK_GAP;
freeEntry = ((blockCompress != 0) ? Benchmark.Compress.FIRST : 256);
htab = new HashTable (); // dm/kmd 4/10/98
codetab = new CodeTable ();
output.WriteByte (Benchmark.Compress.magic_header [0]);
output.WriteByte (Benchmark.Compress.magic_header [1]);
output.WriteByte ((byte) (maxBits | blockCompress));
}
public static OutputBuffer PerformAction (byte [] src, int srcLength, int action, byte [] dst)
{
InputBuffer input = new InputBuffer (srcLength, src);
OutputBuffer output = new OutputBuffer (dst);
if (action == COMPRESS)
{
new Compressor (input, output).Compress ();
}
else
{
new Decompressor (input, output).Decompress ();
}
return output;
}
