Method parseMCOS

src/main/java/com/jmatio/io/MatFileReader.java:430–609

(MLUInt8 mcosData, Set<MLObjectPlaceholder> mcosPlaceholders)

	}

	private static void parseMCOS(MLUInt8 mcosData, Set<MLObjectPlaceholder> mcosPlaceholders) throws IOException {
		// First, parse back out the mcosData.
		ByteBuffer buffer = mcosData.getRealByteBuffer();
		ByteBufferInputStream dataStream = new ByteBufferInputStream(buffer, buffer.limit());

		MatFileReader matFile = new MatFileReader(dataStream, MatFileType.ReducedHeader);
		Map<String, MLArray> mcosContent = matFile.getContent();
		MLCell mcosInfo = (MLCell) ((MLStructure) mcosContent.get("@0")).getField("MCOS");
		ByteBuffer mcosDataBuf = ((MLUInt8) mcosInfo.get(0)).getRealByteBuffer();
		// This bytebuffer needs to be read in the byte order of the MAT file order.  Thus fix.
		mcosDataBuf.order(matFile.getMatFileHeader().getByteOrder());

		// Parse out the data buffer.  First get version information.  Should always equal 2.
		int version = mcosDataBuf.getInt();
		if (version != 2) {
			throw new IllegalStateException("MAT file's MCOS data has a different version(?).  Got: " + version + ", wanted 2.");
		}

		// Get the string count + define the string array.
		int strCount = mcosDataBuf.getInt();
		String[] strs = new String[strCount];

		// Get the segment indexes.
		int segmentIndexes[] = new int[6];
		for (int i = 0; i < segmentIndexes.length; ++i) {
			segmentIndexes[i] = mcosDataBuf.getInt();
		}

		// There should now be 8 0 bytes.  Make sure this is true to avoid object format changes.
		if (mcosDataBuf.getLong() != 0) {
			throw new IllegalStateException("MAT file's MCOS data has different byte values for unknown fields!  Aborting!");
		}

		// Finally, read in each string.  Java doesn't provide an easy way to do this in bulk, so just use a stupid formula for now.
		StringBuilder sb = new StringBuilder();
		for (int i = 0; i < strCount; ++i) {
			sb.setLength(0);
			char next = (char) mcosDataBuf.get();
			while (next != '\0') {
				sb.append(next);
				next = (char) mcosDataBuf.get();
			}
			strs[i] = sb.toString();
		}

		// Sanity check, next 8 byte aligned position in the buffer should equal the start of the first segment!
		if (((mcosDataBuf.position() + 0x07) & ~0x07) != segmentIndexes[0]) {
			throw new IllegalStateException("Data from the strings section was not all read!");
		}

		// First segment, class information.  Really just need the class names.
		List<String> classNamesList = new ArrayList<String>();
		mcosDataBuf.position(segmentIndexes[0]);
		// There are 16 unknown bytes.  Ensure they are 0.
		if (mcosDataBuf.getLong() != 0 || mcosDataBuf.getLong() != 0) {
			throw new IllegalStateException("MAT file's MCOS data has different byte values for unknown fields!  Aborting!");
		}
		while (mcosDataBuf.position() < segmentIndexes[1]) {