water.fvec.C1NChunk Maven / Gradle / Ivy

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package water.fvec;

import water.*;

/**
 * The empty-compression function, if all elements fit directly on UNSIGNED bytes.
 * [In particular, this is the compression style for data read in from files.]
 */
public class C1NChunk extends Chunk {
  protected static final int _OFF=0;
  public C1NChunk(byte[] bs) { _mem=bs; _start = -1; set_len(_mem.length); }
  @Override protected final long   at8_impl( int i ) { return 0xFF&_mem[i]; }
  @Override protected final double atd_impl( int i ) { return 0xFF&_mem[i]; }
  @Override protected final boolean isNA_impl( int i ) { return false; }
  @Override boolean set_impl(int i, long l  ) { return false; }
  @Override boolean set_impl(int i, double d) { return false; }
  @Override boolean set_impl(int i, float f ) { return false; }
  @Override boolean setNA_impl(int idx) { return false; }
  @Override public NewChunk inflate_impl(NewChunk nc) {
    nc.alloc_exponent(_len);
    nc.alloc_mantissa(_len);
    for( int i=0; i< _len; i++ )
      nc.mantissa()[i] = 0xFF&_mem[i+_OFF];
    nc.set_sparseLen(nc.set_len(_len));
    return nc;
  }
  // Custom serializers: the _mem field contains ALL the fields already.
  // Init _start to -1, so we know we have not filled in other fields.
  // Leave _vec & _chk2 null, leave _len unknown.
  @Override final public C1NChunk read_impl(AutoBuffer ab) {
    _mem = ab.bufClose(); _start = -1; _cidx = -1; set_len(_mem.length); return this; }
  @Override
  public boolean hasFloat() {return false;}
}