public void ReadBytesToBuffer(byte[] buffer, long start = 0, int length = -1, int offset = 0)
{
IDataStreamHelpers.ReadBytesToBufferArgsCheck(this, buffer, start, ref length, offset);
while (length > 0)
{
var off = start % fullChunkSize;
int read;
if (off < chunkStart.Length)
{
read = (int)Math.Min(length, chunkStart.Length - off);
chunkStart.ReadBytesToBuffer(buffer, off, read, offset);
}
else if (off > fullChunkSize - 3)
{
read = (int)Math.Min(length, fullChunkSize - off);
chunkEnd.ReadBytesToBuffer(buffer, off - (fullChunkSize - 2), read, offset);
}
else
{
var chunk = start / fullChunkSize;
off -= chunkStart.Length;
read = (int)Math.Min(length, chunkSize - off);
innerStream.ReadBytesToBuffer(buffer, chunk * chunkSize + off, read, offset);
}
length -= read;
offset += read;
start += read;
}
}
/// <inheritdoc/>
public void ReadBytesToBuffer(byte[] buffer, long start = 0, int length = -1, int offset = 0)
{
IDataStreamHelpers.ReadBytesToBufferArgsCheck(this, buffer, start, ref length, offset);
innerStream.ReadBytesToBuffer(buffer, start, length, offset);
for (long i = 0; i < length; ++i)
{
buffer[offset + i] = (byte)(buffer[offset + i] ^ mask[(start + i) % 4]);
}
}
/// <inheritdoc/>
public byte ReadByte(long index)
{
IDataStreamHelpers.ReadByteArgsCheck(this, index);
ChunkHint hint;
lock (dataLock)
{
var hintIdx = locateChunk(index);
hint = chunkHints[hintIdx];
}
var seg = new StreamSegment(stream, hint.StreamStart);
return(seg.ReadByte(index - hint.DataStart));
}
/// <inheritdoc/>
public void ReadBytesToBuffer(byte[] buffer, long start = 0, int length = -1, int offset = 0)
{
IDataStreamHelpers.ReadBytesToBufferArgsCheck(this, buffer, start, ref length, offset);
if (length == 0)
{
return;
}
var remaining = length;
var hintIdx = locateChunk(start);
var hint = chunkHints[hintIdx];
// these 2 must be close together, 2GiB chunks are too big
int chunkOffset = (int)(start - hint.DataStart);
while (remaining > 0)
{
lock (dataLock)
{
if (chunkHints.Count <= hintIdx)
{
hint = hint.ComputeNextHint(this);
chunkHints.Add(hint);
}
else
{
hint = chunkHints[hintIdx];
}
}
var seg = new StreamSegment(stream, hint.StreamStart);
var read = (int)Math.Min(hint.DataLength - chunkOffset, remaining);
seg.ReadBytesToBuffer(buffer, chunkOffset, read, offset);
offset += read;
remaining -= read;
chunkOffset = 0;
++hintIdx;
}
}
