public byte[] ToArray()
{
java.nio.ByteBuffer dup = this.buffer.duplicate();
byte[] result = new byte[this.size];
dup.position(this.offset);
dup.get(result, 0, this.size);
return(result);
}
public static short getShortNumeric(java.nio.ByteBuffer buffer, int len)
{
String s = "";
if (null != buffer && buffer.remaining() >= len)
{
byte[] dest = new byte[len];
buffer.get(dest, 0, len);
s = new String(dest);
}
return((short)(0xFFFF & Integer.parseInt(s)));
}
public static String getString(java.nio.ByteBuffer buffer, int len)
{
String s = "";
if (null != buffer && buffer.remaining() >= len)
{
byte[] dest = new byte[len];
buffer.get(dest, 0, len);
s = new String(dest).trim();
}
return(s);
}
public static String getString(java.nio.ByteBuffer buffer, int offset, int len)
{
String s = "";
if (null != buffer && buffer.capacity() >= offset + len)
{
byte[] dest = new byte[len];
buffer.position(offset);
buffer.get(dest, 0, len);
s = new String(dest).trim();
}
return(s);
}
public RPFHeaderSection(java.nio.ByteBuffer buffer)
{
this.endianIndicator = ((byte)0 != buffer.get()); // reads 1 byte, 0 for big endian
this.headerLength = buffer.getShort(); // reads 2 bytes
this.filename = NITFSUtil.getString(buffer, 12);
this.updateIndicator = NITFSUtil.getByteAsShort(buffer); // reads 1 byte (short)
this.govSpecNumber = NITFSUtil.getString(buffer, 15);
this.govSpecDate = NITFSUtil.getString(buffer, 8);
this.securityClass = NITFSUtil.getString(buffer, 1);
this.securityCountryCode = NITFSUtil.getString(buffer, 2);
this.securityReleaseMark = NITFSUtil.getString(buffer, 2);
this.locationSectionLocation = buffer.getInt(); // read 4 bytes (int)
}
/// <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());
}
public override string ToString()
{
byte[] bytes = new byte[this.size];
java.nio.ByteBuffer dup = this.buffer.duplicate();
dup.position(this.offset);
dup.get(bytes, 0, this.size);
try
{
return(Sharpen.Runtime.GetStringForBytes(bytes, "UTF-8"));
}
catch (System.Exception)
{
throw new System.Exception("UTF-8 is unsupported");
}
}
private void loadColorMaps(java.nio.ByteBuffer buffer, int colormapSubsectionOffset)
{
if (0 == this.numOfColorRecords)
{
throw new NITFSRuntimeException("NITFSReader.InvalidNumberOfColorRecords");
}
if (0 == this.colorElementLength)
{
throw new NITFSRuntimeException("NITFSReader.InvalidLengthOfColorRecordElement");
}
buffer.position((int)(colormapSubsectionOffset + this.colorTableOffset));
int mapLength = (int)(this.numOfColorRecords * this.colorElementLength);
this.colorMap = new byte[mapLength];
buffer.get(this.colorMap, 0, mapLength);
}
public NITFSImageBand(java.nio.ByteBuffer buffer)
{
this.representation = NITFSUtil.getString(buffer, 2);
this.significanceForImageCategory = NITFSUtil.getString(buffer, 6);
this.imageFilterCondition = NITFSUtil.getString(buffer, 1);
this.stdImageFilterCode = NITFSUtil.getString(buffer, 3);
this.numOfLookupTables = NITFSUtil.getShortNumeric(buffer, 1);
this.numOfLookupTableEntries = NITFSUtil.getShortNumeric(buffer, 5);
if (0 < this.numOfLookupTables && 0 < this.numOfLookupTableEntries)
{
this.lut = new byte[this.numOfLookupTables][this.numOfLookupTableEntries];
for (int j = 0; j < this.numOfLookupTables; j++)
{
buffer.get(this.lut[j], 0, this.numOfLookupTableEntries);
}
}
this.isGrayImage = (1 == this.numOfLookupTables);
this.hasTransparentEntry = (217 == this.numOfLookupTableEntries);
}
public CompressionLookupRecord(java.nio.ByteBuffer buffer,
int compressionLookupSubsectionLocation,
RPFColorMap[] colormaps // TODO update LUT with the color mapped values to gain performance
)
{
this.tableID = NITFSUtil.getUShort(buffer);
this.numOfRecords = (int)NITFSUtil.getUInt(buffer);
this.numOfValuesPerRecord = NITFSUtil.getUShort(buffer);
this.valueBitLength = NITFSUtil.getUShort(buffer);
this.tableLocation = (int)(NITFSUtil.getUInt(buffer) + compressionLookupSubsectionLocation);
int saveOffset = buffer.position();
this.bytesPerRecord = (short)(this.numOfValuesPerRecord * this.valueBitLength / 8L);
this.lut = new byte[this.numOfRecords * this.bytesPerRecord];
buffer.position(this.tableLocation);
buffer.get(this.lut, 0, this.numOfRecords * this.bytesPerRecord);
buffer.position(saveOffset);
}
public static String getBitString(java.nio.ByteBuffer buffer, int lenBits)
{
String s = "";
int len = (int)Math.Ceiling(lenBits / (double)Byte.SIZE);
if (null != buffer && buffer.remaining() >= len)
{
byte[] dest = new byte[len];
buffer.get(dest, 0, len);
char[] bits = new char[lenBits];
for (int i = 0; i < lenBits; i++)
{
int mask = 0x1 << (Byte.SIZE - (i % Byte.SIZE) - 1);
// U+0030 : unicode zero
// U+0031 : unicode one
bits[i] = (mask & dest[i / Byte.SIZE]) == 0 ? '\u0030' : '\u0031';
}
s = new String(bits);
}
return(s);
}
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);
}
/// <seealso>[Hitchens2002] p.47: Accessing Unsigned Data</seealso>
/// <param name="buffer"/>
/// <returns/>
public static short getUnsignedByte(java.nio.ByteBuffer buffer)
{
return((short)(buffer.get() & (short)unchecked ((int)(0xff))));
}
public static bool getBoolean(java.nio.ByteBuffer buffer)
{
return(!((byte)0 == buffer.get())); // 0 = false, non-zero = true
}
public static short getByteAsShort(java.nio.ByteBuffer buffer)
{
return((short)(0xFF & buffer.get()));
}