private void readValues(bool ignoreEof)
{
int control = input.ReadByte();
if (control == -1)
{
if (!ignoreEof)
{
throw new EndOfStreamException("Read past end of RLE integer from " + input);
}
used = numLiterals = 0;
return;
}
else if (control < 0x80)
{
numLiterals = control + RunLengthIntegerWriter.MIN_REPEAT_SIZE;
used = 0;
repeat = true;
delta = input.ReadByte();
if (delta == -1)
{
throw new EndOfStreamException("End of stream in RLE Integer from " + input);
}
// convert from 0 to 255 to -128 to 127 by converting to a signed byte
delta = unchecked ((sbyte)(byte)delta);
if (signed)
{
literals[0] = utils.readVslong(input);
}
else
{
literals[0] = (long)utils.readVulong(input);
}
}
else
{
repeat = false;
numLiterals = 0x100 - control;
used = 0;
for (int i = 0; i < numLiterals; ++i)
{
if (signed)
{
literals[i] = utils.readVslong(input);
}
else
{
literals[i] = (long)utils.readVulong(input);
}
}
}
}
private void readValues(bool ignoreEof)
{
int control = input.ReadByte();
used = 0;
if (control == -1)
{
if (!ignoreEof)
{
throw new EndOfStreamException("Read past end of buffer RLE byte from " + input);
}
used = numLiterals = 0;
return;
}
else if (control < 0x80)
{
repeat = true;
numLiterals = control + RunLengthByteWriter.MIN_REPEAT_SIZE;
int val = input.ReadByte();
if (val == -1)
{
throw new EndOfStreamException("Reading RLE byte got EOF");
}
literals[0] = (byte)val;
}
else
{
repeat = false;
numLiterals = 0x100 - control;
int bytes = 0;
while (bytes < numLiterals)
{
int result = input.Read(literals, bytes, numLiterals - bytes);
if (result == -1)
{
throw new EndOfStreamException("Reading RLE byte literal got EOF in " + this);
}
bytes += result;
}
}
}
private void readValues(bool ignoreEof)
{
// read the first 2 bits and determine the encoding type
isRepeating = false;
int firstByte = input.ReadByte();
if (firstByte < 0)
{
if (!ignoreEof)
{
throw new EndOfStreamException("Read past end of RLE integer from " + input);
}
used = numLiterals = 0;
return;
}
currentEncoding = encodings[(firstByte >> 6) & 0x03];
switch (currentEncoding)
{
case RunLengthIntegerWriterV2.EncodingType.SHORT_REPEAT:
readShortRepeatValues(firstByte);
break;
case RunLengthIntegerWriterV2.EncodingType.DIRECT:
readDirectValues(firstByte);
break;
case RunLengthIntegerWriterV2.EncodingType.PATCHED_BASE:
readPatchedBaseValues(firstByte);
break;
case RunLengthIntegerWriterV2.EncodingType.DELTA:
readDeltaValues(firstByte);
break;
default: throw new IOException("Unknown encoding " + currentEncoding);
}
}