internal AbstractPagedMutable(int bitsPerValue, long size, int pageSize)
{
this.bitsPerValue = bitsPerValue;
this.size = size;
pageShift = PackedInt32s.CheckBlockSize(pageSize, MIN_BLOCK_SIZE, MAX_BLOCK_SIZE);
pageMask = pageSize - 1;
int numPages = PackedInt32s.NumBlocks(size, pageSize);
subMutables = new PackedInt32s.Mutable[numPages];
}
protected void FillPages()
{
int numPages = PackedInt32s.NumBlocks(size, PageSize);
for (int i = 0; i < numPages; ++i)
{
// do not allocate for more entries than necessary on the last page
int valueCount = i == numPages - 1 ? LastPageSize(size) : PageSize;
subMutables[i] = NewMutable(valueCount, bitsPerValue);
}
}
/// <summary>
/// Sole constructor. </summary>
public BlockPackedReader(IndexInput @in, int packedIntsVersion, int blockSize, long valueCount, bool direct)
{
this.valueCount = valueCount;
blockShift = PackedInt32s.CheckBlockSize(blockSize, AbstractBlockPackedWriter.MIN_BLOCK_SIZE, AbstractBlockPackedWriter.MAX_BLOCK_SIZE);
blockMask = blockSize - 1;
int numBlocks = PackedInt32s.NumBlocks(valueCount, blockSize);
long[] minValues = null;
subReaders = new PackedInt32s.Reader[numBlocks];
for (int i = 0; i < numBlocks; ++i)
{
int token = @in.ReadByte() & 0xFF;
int bitsPerValue = token.TripleShift(AbstractBlockPackedWriter.BPV_SHIFT);
if (bitsPerValue > 64)
{
throw new Exception("Corrupted");
}
if ((token & AbstractBlockPackedWriter.MIN_VALUE_EQUALS_0) == 0)
{
if (minValues == null)
{
minValues = new long[numBlocks];
}
minValues[i] = BlockPackedReaderIterator.ZigZagDecode(1L + BlockPackedReaderIterator.ReadVInt64(@in));
}
if (bitsPerValue == 0)
{
subReaders[i] = new PackedInt32s.NullReader(blockSize);
}
else
{
int size = (int)Math.Min(blockSize, valueCount - (long)i * blockSize);
if (direct)
{
long pointer = @in.GetFilePointer();
subReaders[i] = PackedInt32s.GetDirectReaderNoHeader(@in, PackedInt32s.Format.PACKED, packedIntsVersion, size, bitsPerValue);
@in.Seek(pointer + PackedInt32s.Format.PACKED.ByteCount(packedIntsVersion, size, bitsPerValue));
}
else
{
subReaders[i] = PackedInt32s.GetReaderNoHeader(@in, PackedInt32s.Format.PACKED, packedIntsVersion, size, bitsPerValue);
}
}
}
this.minValues = minValues;
}
/// <summary>
/// Sole constructor. </summary>
public MonotonicBlockPackedReader(IndexInput @in, int packedIntsVersion, int blockSize, long valueCount, bool direct)
{
this.valueCount = valueCount;
blockShift = PackedInt32s.CheckBlockSize(blockSize, AbstractBlockPackedWriter.MIN_BLOCK_SIZE, AbstractBlockPackedWriter.MAX_BLOCK_SIZE);
blockMask = blockSize - 1;
int numBlocks = PackedInt32s.NumBlocks(valueCount, blockSize);
minValues = new long[numBlocks];
averages = new float[numBlocks];
subReaders = new PackedInt32s.Reader[numBlocks];
for (int i = 0; i < numBlocks; ++i)
{
minValues[i] = @in.ReadVInt64();
averages[i] = J2N.BitConversion.Int32BitsToSingle(@in.ReadInt32());
int bitsPerValue = @in.ReadVInt32();
if (bitsPerValue > 64)
{
throw new Exception("Corrupted");
}
if (bitsPerValue == 0)
{
subReaders[i] = new PackedInt32s.NullReader(blockSize);
}
else
{
int size = (int)Math.Min(blockSize, valueCount - (long)i * blockSize);
if (direct)
{
long pointer = @in.GetFilePointer();
subReaders[i] = PackedInt32s.GetDirectReaderNoHeader(@in, PackedInt32s.Format.PACKED, packedIntsVersion, size, bitsPerValue);
@in.Seek(pointer + PackedInt32s.Format.PACKED.ByteCount(packedIntsVersion, size, bitsPerValue));
}
else
{
subReaders[i] = PackedInt32s.GetReaderNoHeader(@in, PackedInt32s.Format.PACKED, packedIntsVersion, size, bitsPerValue);
}
}
}
}