Examples with CharBuffer java.nio.CharBuffer used on opensource projects

Example 91 with CharBuffer

use of java.nio.CharBuffer in project android_frameworks_base by ResurrectionRemix.

the class GLLogWrapper method toByteBuffer.

private ByteBuffer toByteBuffer(int byteCount, Buffer input) {
    ByteBuffer result = null;
    boolean convertWholeBuffer = (byteCount < 0);
    if (input instanceof ByteBuffer) {
        ByteBuffer input2 = (ByteBuffer) input;
        int position = input2.position();
        if (convertWholeBuffer) {
            byteCount = input2.limit() - position;
        }
        result = ByteBuffer.allocate(byteCount).order(input2.order());
        for (int i = 0; i < byteCount; i++) {
            result.put(input2.get());
        }
        input2.position(position);
    } else if (input instanceof CharBuffer) {
        CharBuffer input2 = (CharBuffer) input;
        int position = input2.position();
        if (convertWholeBuffer) {
            byteCount = (input2.limit() - position) * 2;
        }
        result = ByteBuffer.allocate(byteCount).order(input2.order());
        CharBuffer result2 = result.asCharBuffer();
        for (int i = 0; i < byteCount / 2; i++) {
            result2.put(input2.get());
        }
        input2.position(position);
    } else if (input instanceof ShortBuffer) {
        ShortBuffer input2 = (ShortBuffer) input;
        int position = input2.position();
        if (convertWholeBuffer) {
            byteCount = (input2.limit() - position) * 2;
        }
        result = ByteBuffer.allocate(byteCount).order(input2.order());
        ShortBuffer result2 = result.asShortBuffer();
        for (int i = 0; i < byteCount / 2; i++) {
            result2.put(input2.get());
        }
        input2.position(position);
    } else if (input instanceof IntBuffer) {
        IntBuffer input2 = (IntBuffer) input;
        int position = input2.position();
        if (convertWholeBuffer) {
            byteCount = (input2.limit() - position) * 4;
        }
        result = ByteBuffer.allocate(byteCount).order(input2.order());
        IntBuffer result2 = result.asIntBuffer();
        for (int i = 0; i < byteCount / 4; i++) {
            result2.put(input2.get());
        }
        input2.position(position);
    } else if (input instanceof FloatBuffer) {
        FloatBuffer input2 = (FloatBuffer) input;
        int position = input2.position();
        if (convertWholeBuffer) {
            byteCount = (input2.limit() - position) * 4;
        }
        result = ByteBuffer.allocate(byteCount).order(input2.order());
        FloatBuffer result2 = result.asFloatBuffer();
        for (int i = 0; i < byteCount / 4; i++) {
            result2.put(input2.get());
        }
        input2.position(position);
    } else if (input instanceof DoubleBuffer) {
        DoubleBuffer input2 = (DoubleBuffer) input;
        int position = input2.position();
        if (convertWholeBuffer) {
            byteCount = (input2.limit() - position) * 8;
        }
        result = ByteBuffer.allocate(byteCount).order(input2.order());
        DoubleBuffer result2 = result.asDoubleBuffer();
        for (int i = 0; i < byteCount / 8; i++) {
            result2.put(input2.get());
        }
        input2.position(position);
    } else if (input instanceof LongBuffer) {
        LongBuffer input2 = (LongBuffer) input;
        int position = input2.position();
        if (convertWholeBuffer) {
            byteCount = (input2.limit() - position) * 8;
        }
        result = ByteBuffer.allocate(byteCount).order(input2.order());
        LongBuffer result2 = result.asLongBuffer();
        for (int i = 0; i < byteCount / 8; i++) {
            result2.put(input2.get());
        }
        input2.position(position);
    } else {
        throw new RuntimeException("Unimplemented Buffer subclass.");
    }
    result.rewind();
    // The OpenGL API will interpret the result in hardware byte order,
    // so we better do that as well:
    result.order(ByteOrder.nativeOrder());
    return result;
}

Example 92 with CharBuffer

use of java.nio.CharBuffer in project voltdb by VoltDB.

the class ReaderInputStream method grow.

/** Returns a new CharBuffer identical to buf, except twice the capacity. */
private static CharBuffer grow(CharBuffer buf) {
    char[] copy = Arrays.copyOf(buf.array(), buf.capacity() * 2);
    CharBuffer bigger = CharBuffer.wrap(copy);
    bigger.position(buf.position());
    bigger.limit(buf.limit());
    return bigger;
}

Example 93 with CharBuffer

use of java.nio.CharBuffer in project voltdb by VoltDB.

the class CharStreams method exhaust.

/**
   * Reads and discards data from the given {@code Readable} until the end of the stream is
   * reached. Returns the total number of chars read. Does not close the stream.
   *
   * @since 20.0
   */
@CanIgnoreReturnValue
public static long exhaust(Readable readable) throws IOException {
    long total = 0;
    long read;
    CharBuffer buf = createBuffer();
    while ((read = readable.read(buf)) != -1) {
        total += read;
        buf.clear();
    }
    return total;
}

Example 94 with CharBuffer

use of java.nio.CharBuffer in project voltdb by VoltDB.

the class ByteBufUtil method decodeString.

static String decodeString(ByteBuf src, int readerIndex, int len, Charset charset) {
    if (len == 0) {
        return StringUtil.EMPTY_STRING;
    }
    final CharsetDecoder decoder = CharsetUtil.decoder(charset);
    final int maxLength = (int) ((double) len * decoder.maxCharsPerByte());
    CharBuffer dst = CHAR_BUFFERS.get();
    if (dst.length() < maxLength) {
        dst = CharBuffer.allocate(maxLength);
        if (maxLength <= MAX_CHAR_BUFFER_SIZE) {
            CHAR_BUFFERS.set(dst);
        }
    } else {
        dst.clear();
    }
    if (src.nioBufferCount() == 1) {
        // Use internalNioBuffer(...) to reduce object creation.
        decodeString(decoder, src.internalNioBuffer(readerIndex, len), dst);
    } else {
        // We use a heap buffer as CharsetDecoder is most likely able to use a fast-path if src and dst buffers
        // are both backed by a byte array.
        ByteBuf buffer = src.alloc().heapBuffer(len);
        try {
            buffer.writeBytes(src, readerIndex, len);
            // Use internalNioBuffer(...) to reduce object creation.
            decodeString(decoder, buffer.internalNioBuffer(0, len), dst);
        } finally {
            // Release the temporary buffer again.
            buffer.release();
        }
    }
    return dst.flip().toString();
}

Example 95 with CharBuffer

use of java.nio.CharBuffer in project voltdb by VoltDB.

the class Unpooled method copiedBuffer.

/**
     * Creates a new big-endian buffer whose content is a subregion of
     * the specified {@code string} encoded in the specified {@code charset}.
     * The new buffer's {@code readerIndex} and {@code writerIndex} are
     * {@code 0} and the length of the encoded string respectively.
     */
public static ByteBuf copiedBuffer(CharSequence string, int offset, int length, Charset charset) {
    if (string == null) {
        throw new NullPointerException("string");
    }
    if (length == 0) {
        return EMPTY_BUFFER;
    }
    if (string instanceof CharBuffer) {
        CharBuffer buf = (CharBuffer) string;
        if (buf.hasArray()) {
            return copiedBuffer(buf.array(), buf.arrayOffset() + buf.position() + offset, length, charset);
        }
        buf = buf.slice();
        buf.limit(length);
        buf.position(offset);
        return copiedBuffer(buf, charset);
    }
    return copiedBuffer(CharBuffer.wrap(string, offset, offset + length), charset);
}