package water.fvec;
import water.util.UnsafeUtils;
/**
* The empty-compression function, where data is in 'long's.
*/
public class C8Chunk extends Chunk {
protected static final long _NA = Long.MIN_VALUE;
C8Chunk( byte[] bs ) { _mem=bs; _start = -1; set_len(_mem.length>>3); }
@Override protected final long at8_impl( int i ) {
long res = UnsafeUtils.get8(_mem,i<<3);
if( res == _NA ) throw new IllegalArgumentException("at8_abs but value is missing");
return res;
}
@Override protected final double atd_impl( int i ) {
long res = UnsafeUtils.get8(_mem,i<<3);
return res == _NA?Double.NaN:res;
}
@Override protected final boolean isNA_impl( int i ) { return UnsafeUtils.get8(_mem, i << 3)==_NA; }
@Override boolean set_impl(int idx, 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) { UnsafeUtils.set8(_mem,(idx<<3),_NA); return true; }
@Override public final void initFromBytes () {
_start = -1; _cidx = -1;
set_len(_mem.length>>3);
assert _mem.length == _len <<3;
}
@Override
public boolean hasFloat() {return false;}
private final void processRow(int r, ChunkVisitor v){
long l = UnsafeUtils.get8(_mem,(r<<3));
if(l == _NA) v.addNAs(1);
else v.addValue(l);
}
@Override
public <T extends ChunkVisitor> T processRows(T v, int from, int to) {
for(int i = from; i < to; i++) processRow(i,v);
return v;
}
@Override
public <T extends ChunkVisitor> T processRows(T v, int[] ids) {
for(int i:ids) processRow(i,v);
return v;
}
@Override public double [] getDoubles(double [] vals, int from, int to, double NA){
for(int i = from; i < to; i++) {
long x = UnsafeUtils.get8(_mem, 8*i);
vals[i-from] = (x == _NA)?NA:x;
}
return vals;
}
@Override public double [] getDoubles(double [] vals, int [] ids){
int k = 0;
for(int i:ids) {
long x = UnsafeUtils.get8(_mem, 8*i);
vals[k++] = (x == _NA)?Double.NaN:x;
}
return vals;
}
}