Java Code Examples for net.jpountz.util.SafeUtils#readIntLE()

The following examples show how to use net.jpountz.util.SafeUtils#readIntLE() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: Lz4BlockDecompressor.java    From flink with Apache License 2.0 5 votes vote down vote up 
@Override
public int decompress(byte[] src, int srcOff, int srcLen, byte[] dst, int dstOff)
		throws InsufficientBufferException, DataCorruptionException {
	final int compressedLen = SafeUtils.readIntLE(src, srcOff);
	final int originalLen = SafeUtils.readIntLE(src, srcOff + 4);
	validateLength(compressedLen, originalLen);

	if (dst.length - dstOff < originalLen) {
		throw new InsufficientBufferException("Buffer length too small");
	}

	if (src.length - srcOff - HEADER_LENGTH < compressedLen) {
		throw new DataCorruptionException("Source data is not integral for decompression.");
	}

	try {
		final int compressedLen2 = decompressor.decompress(
				src,
				srcOff + HEADER_LENGTH,
				dst,
				dstOff,
				originalLen
		);
		if (compressedLen != compressedLen2) {
			throw new DataCorruptionException("Input is corrupted");
		}
	}
	catch (LZ4Exception e) {
		throw new DataCorruptionException("Input is corrupted", e);
	}

	return originalLen;
}
Example 2
Source File: ChannelLZ4Decompressor.java    From datakernel with Apache License 2.0 5 votes vote down vote up 
private static void readHeader(Header header, byte[] buf, int off) throws ParseException {
	for (int i = 0; i < MAGIC_LENGTH; ++i) {
		if (buf[off + i] != MAGIC[i]) {
			throw STREAM_IS_CORRUPTED;
		}
	}
	int token = buf[off + MAGIC_LENGTH] & 0xFF;
	header.compressionMethod = token & 0xF0;
	int compressionLevel = COMPRESSION_LEVEL_BASE + (token & 0x0F);
	if (header.compressionMethod != COMPRESSION_METHOD_RAW && header.compressionMethod != COMPRESSION_METHOD_LZ4) {
		throw STREAM_IS_CORRUPTED;
	}
	header.compressedLen = SafeUtils.readIntLE(buf, off + MAGIC_LENGTH + 1);
	header.originalLen = SafeUtils.readIntLE(buf, off + MAGIC_LENGTH + 5);
	header.check = SafeUtils.readIntLE(buf, off + MAGIC_LENGTH + 9);
	if (header.originalLen > 1 << compressionLevel
			|| (header.originalLen < 0 || header.compressedLen < 0)
			|| (header.originalLen == 0 && header.compressedLen != 0)
			|| (header.originalLen != 0 && header.compressedLen == 0)
			|| (header.compressionMethod == COMPRESSION_METHOD_RAW && header.originalLen != header.compressedLen)) {
		throw STREAM_IS_CORRUPTED;
	}
	if (header.originalLen == 0) {
		if (header.check != 0) {
			throw STREAM_IS_CORRUPTED;
		}
		header.finished = true;
	}
}
Example 3
Source File: Lz4BlockDecompressor.java    From flink with Apache License 2.0 5 votes vote down vote up 
@Override
public int decompress(byte[] src, int srcOff, int srcLen, byte[] dst, int dstOff)
		throws InsufficientBufferException, DataCorruptionException {
	final int compressedLen = SafeUtils.readIntLE(src, srcOff);
	final int originalLen = SafeUtils.readIntLE(src, srcOff + 4);
	validateLength(compressedLen, originalLen);

	if (dst.length - dstOff < originalLen) {
		throw new InsufficientBufferException("Buffer length too small");
	}

	if (src.length - srcOff - HEADER_LENGTH < compressedLen) {
		throw new DataCorruptionException("Source data is not integral for decompression.");
	}

	try {
		final int compressedLen2 = decompressor.decompress(
				src,
				srcOff + HEADER_LENGTH,
				dst,
				dstOff,
				originalLen
		);
		if (compressedLen != compressedLen2) {
			throw new DataCorruptionException("Input is corrupted");
		}
	}
	catch (LZ4Exception e) {
		throw new DataCorruptionException("Input is corrupted", e);
	}

	return originalLen;
}