public override java.nio.LongBuffer compact()
{
if (byteBuffer.isReadOnly())
{
throw new java.nio.ReadOnlyBufferException();
}
byteBuffer.limit(_limit * libcore.io.SizeOf.LONG);
byteBuffer.position(_position * libcore.io.SizeOf.LONG);
byteBuffer.compact();
byteBuffer.clear();
_position = _limit - _position;
_limit = _capacity;
_mark = UNSET_MARK;
return(this);
}
/// <summary>
/// Constructs a new InputStreamReader on the InputStream
/// <code>in</code>
/// and
/// CharsetDecoder
/// <code>dec</code>
/// .
/// </summary>
/// <param name="in">the source InputStream from which to read characters.</param>
/// <param name="dec">the CharsetDecoder used by the character conversion.</param>
public InputStreamReader(java.io.InputStream @in, java.nio.charset.CharsetDecoder
dec) : base(@in)
{
dec.averageCharsPerByte();
this.@in = @in;
decoder = dec;
bytes.limit(0);
}
public java.nio.ByteBuffer AsByteBuffer()
{
java.nio.ByteBuffer dup = this.buffer.asReadOnlyBuffer();
dup.position(this.offset);
java.nio.ByteBuffer result = dup.slice();
result.limit(this.size);
return(result);
}
/// <exception cref="System.IO.IOException"/>
public int Read(java.nio.ByteBuffer dst)
{
int size = System.Math.Min(dst.remaining(), this.buf.remaining());
java.nio.ByteBuffer slice = this.buf.slice();
slice.limit(size);
dst.buffer = slice.buffer;
dst.offset = slice.offset;
dst.limit(size);
dst.position(size);
this.buf.position(this.buf.position() + size);
return(size);
}
public java.nio.ByteBuffer[] getSegmentsForOutput()
{
java.nio.ByteBuffer[] result = new java.nio.ByteBuffer[this.segments.Count];
for (int ii = 0; ii < this.segments.Count; ++ii)
{
Capnproto.SegmentBuilder segment = segments[ii];
segment.buffer.rewind();
java.nio.ByteBuffer slice = segment.buffer.slice();
slice.limit(segment.currentSize() * Capnproto.Constants.BYTES_PER_WORD);
slice.order(java.nio.ByteOrder.LITTLE_ENDIAN);
result[ii] = slice;
}
return(result);
}
/// <summary>Pretty-print byte buffer in hex</summary>
/// <param name="buffer"/>
/// <returns/>
public static string print(java.nio.ByteBuffer buffer)
{
System.Text.StringBuilder sb = new System.Text.StringBuilder();
int lim = buffer.limit();
for (int i = 0; i < lim; i++)
{
sb.Append(string.format("%x", buffer.get(i)));
if (i % 8 == 7)
{
sb.Append(" ");
}
}
return(sb.ToString().Trim());
}
/// <summary>
/// Copys the elements of a char buffer to a byte buffer
/// Concurency: access must be externally synchronized
/// </summary>
/// <param name="src"/>
/// <param name="dest"/>
/// <returns>dest for easy invocation chaining</returns>
public static java.nio.ByteBuffer copy(java.nio.CharBuffer src, java.nio.ByteBuffer
dest)
{
int length = src.Length;
int i;
for (i = 0; i < length; i++)
{
dest.put(i, unchecked ((byte)src.get(i)));
}
for (; i < dest.limit(); i++)
{
dest.put(i, unchecked ((byte)0));
}
return(dest);
}
/// <exception cref="System.IO.IOException"/>
public int Read(java.nio.ByteBuffer dst)
{
int numBytes = dst.remaining();
if (numBytes < this.buf.remaining())
{
//# Serve from the current buffer.
java.nio.ByteBuffer slice = this.buf.slice();
slice.limit(numBytes);
dst.put(slice);
this.buf.position(this.buf.position() + numBytes);
return(numBytes);
}
else
{
//# Copy current available into destination.
int fromFirstBuffer = this.buf.remaining();
{
java.nio.ByteBuffer slice = this.buf.slice();
slice.limit(fromFirstBuffer);
dst.put(slice);
}
numBytes -= fromFirstBuffer;
if (numBytes <= this.buf.capacity())
{
//# Read the next buffer-full.
this.buf.clear();
int n = readAtLeast(this.inner, this.buf, numBytes);
this.buf.rewind();
java.nio.ByteBuffer slice = this.buf.slice();
slice.limit(numBytes);
dst.put(slice);
this.buf.limit(n);
this.buf.position(numBytes);
return(fromFirstBuffer + numBytes);
}
else
{
//# Forward large read to the underlying stream.
this.buf.clear();
this.buf.limit(0);
return(fromFirstBuffer + readAtLeast(this.inner, dst, numBytes));
}
}
}
/// <exception cref="System.IO.IOException"/>
public int Write(java.nio.ByteBuffer src)
{
int available = this.buf.remaining();
int size = src.remaining();
if (size <= available)
{
this.buf.put(src);
}
else if (size <= this.buf.capacity())
{
//# Too much for this buffer, but not a full buffer's worth,
//# so we'll go ahead and copy.
java.nio.ByteBuffer slice = src.slice();
slice.limit(available);
this.buf.put(slice);
this.buf.rewind();
while (this.buf.hasRemaining())
{
this.inner.Write(this.buf);
}
this.buf.rewind();
src.position(src.position() + available);
this.buf.put(src);
}
else
{
//# Writing so much data that we might as well write
//# directly to avoid a copy.
int pos = this.buf.position();
this.buf.rewind();
java.nio.ByteBuffer slice = this.buf.slice();
slice.limit(pos);
while (slice.hasRemaining())
{
this.inner.Write(slice);
}
while (src.hasRemaining())
{
this.inner.Write(src);
}
}
return(size);
}
public virtual java.nio.ByteBuffer put(java.nio.ByteBuffer src)
{
if (src == this)
{
throw new System.ArgumentException("src == this");
}
int srcByteCount = src.remaining();
if (srcByteCount > remaining())
{
throw new java.nio.BufferOverflowException();
}
if (src.isDirect())
{
throw new System.InvalidOperationException();
}
byte[] srcObject = java.nio.NioUtils.unsafeArray(src);
int srcOffset = src.position();
if (!src.isDirect())
{
srcOffset += java.nio.NioUtils.unsafeArrayOffset(src);
}
java.nio.ByteBuffer dst = this;
if (dst.isDirect())
{
throw new System.InvalidOperationException();
}
byte[] dstObject = java.nio.NioUtils.unsafeArray(dst);
int dstOffset = dst.position();
if (!dst.isDirect())
{
dstOffset += java.nio.NioUtils.unsafeArrayOffset(dst);
}
System.Array.Copy(srcObject, srcOffset, dstObject, dstOffset, srcByteCount);
src.position(src.limit());
dst.position(dst.position() + srcByteCount);
return(this);
}
public static long computeSerializedSizeInWords(Capnproto.MessageBuilder message)
{
java.nio.ByteBuffer[] segments = message.GetSegmentsForOutput();
//From the capnproto documentation:
//"When transmitting over a stream, the following should be sent..."
long bytes = 0;
//"(4 bytes) The number of segments, minus one..."
bytes += 4;
//"(N * 4 bytes) The size of each segment, in words."
bytes += segments.Length * 4;
//"(0 or 4 bytes) Padding up to the next word boundary."
if (bytes % 8 != 0)
{
bytes += 4;
}
//The content of each segment, in order.
for (int i = 0; i < segments.Length; ++i)
{
java.nio.ByteBuffer s = segments[i];
bytes += s.limit();
}
return(bytes / Capnproto.Constants.BYTES_PER_WORD);
}
public static void BlockCopy(ByteBuffer src, int srcPos, ByteBuffer dst, int dstPos, int length)
{
if (src.hasArray() && dst.hasArray())
{
java.lang.System.arraycopy(src.array(),
src.arrayOffset() + srcPos,
dst.array(),
dst.arrayOffset() + dstPos,
length);
}
else
{
if (src.limit() - srcPos < length || dst.limit() - dstPos < length)
{
throw new java.lang.IndexOutOfBoundsException();
}
for (int i = 0; i < length; i++)
{
// TODO: ByteBuffer.put is polymorphic, and might be slow here
dst.put(dstPos++, src.get(srcPos++));
}
}
}
/// <exception cref="System.IO.IOException"/>
public int Read(java.nio.ByteBuffer outBuf)
{
if (outBuf.buffer == null)
{
outBuf.buffer = new byte[outBuf.remaining()];
}
int len = outBuf.remaining();
if (len == 0)
{
return(0);
}
if (len % 8 != 0)
{
throw new System.Exception("PackedInputStream reads must be word-aligned");
}
int outPtr = outBuf.position();
int outEnd = outPtr + len;
java.nio.ByteBuffer inBuf = this.inner.GetReadBuffer();
while (true)
{
byte tag = 0;
if (inBuf.remaining() < 10)
{
if (outBuf.remaining() == 0)
{
return(len);
}
if (inBuf.remaining() == 0)
{
inBuf = this.inner.GetReadBuffer();
continue;
}
//# We have at least 1, but not 10, bytes available. We need to read
//# slowly, doing a bounds check on each byte.
tag = inBuf.get();
for (int i = 0; i < 8; ++i)
{
if ((tag & (1 << i)) != 0)
{
if (inBuf.remaining() == 0)
{
inBuf = this.inner.GetReadBuffer();
}
outBuf.put(inBuf.get());
}
else
{
outBuf.put((byte)0);
}
}
if (inBuf.remaining() == 0 && (tag == 0 || tag == 0xff))
{
inBuf = this.inner.GetReadBuffer();
}
}
else
{
tag = inBuf.get();
for (int n = 0; n < 8; ++n)
{
bool isNonzero = (tag & (1 << n)) != 0;
outBuf.put(unchecked ((byte)(inBuf.get() & (isNonzero? -1 : 0))));
inBuf.position(inBuf.position() + (isNonzero? 0 : -1));
}
}
if (tag == 0)
{
if (inBuf.remaining() == 0)
{
throw new System.Exception("Should always have non-empty buffer here.");
}
int runLength = (unchecked ((int)(0xff)) & (int)inBuf.get()) * 8;
if (runLength > outEnd - outPtr)
{
throw new System.Exception("Packed input did not end cleanly on a segment boundary");
}
for (int i = 0; i < runLength; ++i)
{
outBuf.put((byte)0);
}
}
else if (tag == 0xff)
{
int runLength = (unchecked ((int)(0xff)) & (int)inBuf.get()) * 8;
if (inBuf.remaining() >= runLength)
{
//# Fast path.
java.nio.ByteBuffer slice = inBuf.slice();
slice.limit(runLength);
outBuf.put(slice);
inBuf.position(inBuf.position() + runLength);
}
else
{
//# Copy over the first buffer, then do one big read for the rest.
runLength -= inBuf.remaining();
outBuf.put(inBuf);
java.nio.ByteBuffer slice = outBuf.slice();
slice.limit(runLength);
this.inner.Read(slice);
outBuf.position(outBuf.position() + runLength);
if (outBuf.remaining() == 0)
{
return(len);
}
inBuf = this.inner.GetReadBuffer();
continue;
}
}
if (outBuf.remaining() == 0)
{
return(len);
}
}
}
/// <exception cref="System.IO.IOException"/>
public int Write(java.nio.ByteBuffer inBuf)
{
int length = inBuf.remaining();
java.nio.ByteBuffer @out = this.inner.GetWriteBuffer();
java.nio.ByteBuffer slowBuffer = java.nio.ByteBuffer.allocate(20);
int inPtr = inBuf.position();
int inEnd = inPtr + length;
while (inPtr < inEnd)
{
if (@out.remaining() < 10)
{
//# Oops, we're out of space. We need at least 10
//# bytes for the fast path, since we don't
//# bounds-check on every byte.
if (@out == slowBuffer)
{
int oldLimit = @out.limit();
@out.limit(@out.position());
@out.rewind();
this.inner.Write(@out);
@out.limit(oldLimit);
}
@out = slowBuffer;
@out.rewind();
}
int tagPos = @out.position();
@out.position(tagPos + 1);
byte curByte;
curByte = inBuf.get(inPtr);
byte bit0 = (curByte != 0)? unchecked ((byte)1) : unchecked ((byte)0);
@out.put(curByte);
@out.position(@out.position() + bit0 - 1);
inPtr += 1;
curByte = inBuf.get(inPtr);
byte bit1 = (curByte != 0)? unchecked ((byte)1) : unchecked ((byte)0);
@out.put(curByte);
@out.position(@out.position() + bit1 - 1);
inPtr += 1;
curByte = inBuf.get(inPtr);
byte bit2 = (curByte != 0)? unchecked ((byte)1) : unchecked ((byte)0);
@out.put(curByte);
@out.position(@out.position() + bit2 - 1);
inPtr += 1;
curByte = inBuf.get(inPtr);
byte bit3 = (curByte != 0)? unchecked ((byte)1) : unchecked ((byte)0);
@out.put(curByte);
@out.position(@out.position() + bit3 - 1);
inPtr += 1;
curByte = inBuf.get(inPtr);
byte bit4 = (curByte != 0)? unchecked ((byte)1) : unchecked ((byte)0);
@out.put(curByte);
@out.position(@out.position() + bit4 - 1);
inPtr += 1;
curByte = inBuf.get(inPtr);
byte bit5 = (curByte != 0)? unchecked ((byte)1) : unchecked ((byte)0);
@out.put(curByte);
@out.position(@out.position() + bit5 - 1);
inPtr += 1;
curByte = inBuf.get(inPtr);
byte bit6 = (curByte != 0)? unchecked ((byte)1) : unchecked ((byte)0);
@out.put(curByte);
@out.position(@out.position() + bit6 - 1);
inPtr += 1;
curByte = inBuf.get(inPtr);
byte bit7 = (curByte != 0)? unchecked ((byte)1) : unchecked ((byte)0);
@out.put(curByte);
@out.position(@out.position() + bit7 - 1);
inPtr += 1;
byte tag = unchecked ((byte)((bit0 << 0) | (bit1 << 1) | (bit2 << 2) | (bit3 << 3)
| (bit4 << 4) | (bit5 << 5) | (bit6 << 6) | (bit7 << 7)));
@out.put(tagPos, tag);
if (tag == 0)
{
//# An all-zero word is followed by a count of
//# consecutive zero words (not including the first
//# one).
int runStart = inPtr;
int limit = inEnd;
if (limit - inPtr > 255 * 8)
{
limit = inPtr + 255 * 8;
}
while (inPtr < limit && inBuf.getLong(inPtr) == 0)
{
inPtr += 8;
}
@out.put(unchecked ((byte)((inPtr - runStart) / 8)));
}
else if (tag == unchecked ((byte)unchecked ((int)(0xff))))
{
//# An all-nonzero word is followed by a count of
//# consecutive uncompressed words, followed by the
//# uncompressed words themselves.
//# Count the number of consecutive words in the input
//# which have no more than a single zero-byte. We look
//# for at least two zeros because that's the point
//# where our compression scheme becomes a net win.
int runStart = inPtr;
int limit = inEnd;
if (limit - inPtr > 255 * 8)
{
limit = inPtr + 255 * 8;
}
while (inPtr < limit)
{
byte c = 0;
for (int ii = 0; ii < 8; ++ii)
{
c += (inBuf.get(inPtr) == 0 ? (byte)1 : (byte)0);
inPtr += 1;
}
if (c >= 2)
{
//# Un-read the word with multiple zeros, since
//# we'll want to compress that one.
inPtr -= 8;
break;
}
}
int count = inPtr - runStart;
@out.put(unchecked ((byte)(count / 8)));
if (count <= @out.remaining())
{
//# There's enough space to memcpy.
inBuf.position(runStart);
java.nio.ByteBuffer slice = inBuf.slice();
slice.limit(count);
@out.put(slice);
}
else
{
//# Input overruns the output buffer. We'll give it
//# to the output stream in one chunk and let it
//# decide what to do.
if (@out == slowBuffer)
{
int oldLimit = @out.limit();
@out.limit(@out.position());
@out.rewind();
this.inner.Write(@out);
@out.limit(oldLimit);
}
inBuf.position(runStart);
java.nio.ByteBuffer slice = inBuf.slice();
slice.limit(count);
while (slice.hasRemaining())
{
this.inner.Write(slice);
}
@out = this.inner.GetWriteBuffer();
}
}
}
if (@out == slowBuffer)
{
@out.limit(@out.position());
@out.rewind();
this.inner.Write(@out);
}
inBuf.position(inPtr);
return(length);
}
