Examples with ByteCache net.i2p.util.ByteCache used on opensource projects

Example 1 with ByteCache

use of net.i2p.util.ByteCache in project i2p.i2p by i2p.

the class DataHelper method copy.

/**
 * Copy in to out. Caller MUST close the streams.
 *
 * @param in non-null
 * @param out non-null
 * @since 0.9.29
 */
public static void copy(InputStream in, OutputStream out) throws IOException {
    final ByteCache cache = ByteCache.getInstance(8, 8 * 1024);
    final ByteArray ba = cache.acquire();
    try {
        final byte[] buf = ba.getData();
        int read;
        while ((read = in.read(buf)) != -1) {
            out.write(buf, 0, read);
        }
    } finally {
        cache.release(ba);
    }
}

Example 2 with ByteCache

use of net.i2p.util.ByteCache in project i2p.i2p by i2p.

the class DataHelper method decompress.

/**
 *  Decompress the GZIP compressed data (returning null on error).
 *  @throws IOException if uncompressed is over 40 KB,
 *                      or on a decompression error
 *  @return null if orig is null
 */
public static byte[] decompress(byte[] orig, int offset, int length) throws IOException {
    if (orig == null)
        return orig;
    if (offset + length > orig.length)
        throw new IOException("Bad params arrlen " + orig.length + " off " + offset + " len " + length);
    ReusableGZIPInputStream in = ReusableGZIPInputStream.acquire();
    in.initialize(new ByteArrayInputStream(orig, offset, length));
    // don't make this a static field, or else I2PAppContext gets initialized too early
    ByteCache cache = ByteCache.getInstance(8, MAX_UNCOMPRESSED);
    ByteArray outBuf = cache.acquire();
    try {
        int written = 0;
        while (true) {
            int read = in.read(outBuf.getData(), written, MAX_UNCOMPRESSED - written);
            if (read == -1)
                break;
            written += read;
            if (written >= MAX_UNCOMPRESSED) {
                if (in.available() > 0)
                    throw new IOException("Uncompressed data larger than " + MAX_UNCOMPRESSED);
                break;
            }
        }
        byte[] rv = new byte[written];
        System.arraycopy(outBuf.getData(), 0, rv, 0, written);
        return rv;
    } finally {
        cache.release(outBuf);
        ReusableGZIPInputStream.release(in);
    }
}