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

Example 1 with CharBuffer

use of java.nio.CharBuffer in project jvm-serializers by eishay.

the class JsonFormat method toStringBuilder.

// TODO(chrisn): See if working around java.io.Reader#read(CharBuffer)
// overhead is worthwhile
private static StringBuilder toStringBuilder(Readable input) throws IOException {
    StringBuilder text = new StringBuilder();
    CharBuffer buffer = CharBuffer.allocate(BUFFER_SIZE);
    while (true) {
        int n = input.read(buffer);
        if (n == -1) {
            break;
        }
        buffer.flip();
        text.append(buffer, 0, n);
    }
    return text;
}

Example 2 with CharBuffer

use of java.nio.CharBuffer in project buck by facebook.

the class NulTerminatedCharsetDecoderTest method nulTerminatedBufferDecodesContentsToBuffer.

@Test
public void nulTerminatedBufferDecodesContentsToBuffer() {
    NulTerminatedCharsetDecoder decoder = new NulTerminatedCharsetDecoder(StandardCharsets.UTF_8.newDecoder());
    // U+1F4A9 in UTF-8
    ByteBuffer in = decodeHex("F09F92A900");
    CharBuffer out = CharBuffer.allocate(2);
    assertThat(in.position(), is(equalTo(0)));
    assertThat(in.limit(), is(equalTo(5)));
    assertThat(out.position(), is(equalTo(0)));
    assertThat(out.limit(), is(equalTo(2)));
    NulTerminatedCharsetDecoder.Result result = decoder.decode(in, out, true);
    assertThat(result, is(equalTo(new NulTerminatedCharsetDecoder.Result(true, CoderResult.UNDERFLOW))));
    assertThat(in.position(), is(equalTo(5)));
    assertThat(in.limit(), is(equalTo(5)));
    assertThat(out.position(), is(equalTo(2)));
    assertThat(out.limit(), is(equalTo(2)));
    out.flip();
    // U+1F4A9 in Java
    assertThat(out.toString(), is(equalTo("💩")));
}

Example 3 with CharBuffer

use of java.nio.CharBuffer in project buck by facebook.

the class NulTerminatedCharsetDecoderTest method nulTerminatedEmptyBufferDecodesToEmptyBuffer.

@Test
public void nulTerminatedEmptyBufferDecodesToEmptyBuffer() {
    NulTerminatedCharsetDecoder decoder = new NulTerminatedCharsetDecoder(StandardCharsets.UTF_8.newDecoder());
    ByteBuffer in = decodeHex("00");
    CharBuffer out = CharBuffer.allocate(0);
    assertThat(in.position(), is(equalTo(0)));
    assertThat(in.limit(), is(equalTo(1)));
    assertThat(out.position(), is(equalTo(0)));
    assertThat(out.limit(), is(equalTo(0)));
    NulTerminatedCharsetDecoder.Result result = decoder.decode(in, out, true);
    assertThat(in.position(), is(equalTo(1)));
    assertThat(in.limit(), is(equalTo(1)));
    assertThat(out.position(), is(equalTo(0)));
    assertThat(out.limit(), is(equalTo(0)));
    assertThat(result, is(equalTo(new NulTerminatedCharsetDecoder.Result(true, CoderResult.UNDERFLOW))));
}

Example 4 with CharBuffer

use of java.nio.CharBuffer in project buck by facebook.

the class NulTerminatedCharsetDecoderTest method invalidUTF8BufferReturnsMalformedResult.

@Test
public void invalidUTF8BufferReturnsMalformedResult() {
    NulTerminatedCharsetDecoder decoder = new NulTerminatedCharsetDecoder(StandardCharsets.UTF_8.newDecoder());
    ByteBuffer in = decodeHex("C0FFEE00");
    CharBuffer out = CharBuffer.allocate(4);
    assertThat(in.position(), is(equalTo(0)));
    assertThat(in.limit(), is(equalTo(4)));
    assertThat(out.position(), is(equalTo(0)));
    assertThat(out.limit(), is(equalTo(4)));
    NulTerminatedCharsetDecoder.Result result = decoder.decode(in, out, true);
    assertThat(result, is(equalTo(new NulTerminatedCharsetDecoder.Result(false, CoderResult.malformedForLength(1)))));
    assertThat(in.position(), is(equalTo(0)));
    assertThat(in.limit(), is(equalTo(4)));
    assertThat(out.position(), is(equalTo(0)));
    assertThat(out.limit(), is(equalTo(4)));
}

Example 5 with CharBuffer

use of java.nio.CharBuffer in project deeplearning4j by deeplearning4j.

the class DoubleArrayTrie method write.

public void write(OutputStream output) throws IOException {
    baseBuffer.rewind();
    checkBuffer.rewind();
    tailBuffer.rewind();
    int baseCheckSize = Math.min(maxBaseCheckIndex + 64, baseBuffer.capacity());
    int tailSize = Math.min(tailIndex - TAIL_OFFSET + 64, tailBuffer.capacity());
    DataOutputStream dataOutput = new DataOutputStream(new BufferedOutputStream(output));
    dataOutput.writeBoolean(compact);
    dataOutput.writeInt(baseCheckSize);
    dataOutput.writeInt(tailSize);
    WritableByteChannel channel = Channels.newChannel(dataOutput);
    ByteBuffer tmpBuffer = ByteBuffer.allocate(baseCheckSize * 4);
    IntBuffer tmpIntBuffer = tmpBuffer.asIntBuffer();
    tmpIntBuffer.put(baseBuffer.array(), 0, baseCheckSize);
    tmpBuffer.rewind();
    channel.write(tmpBuffer);
    tmpBuffer = ByteBuffer.allocate(baseCheckSize * 4);
    tmpIntBuffer = tmpBuffer.asIntBuffer();
    tmpIntBuffer.put(checkBuffer.array(), 0, baseCheckSize);
    tmpBuffer.rewind();
    channel.write(tmpBuffer);
    tmpBuffer = ByteBuffer.allocate(tailSize * 2);
    CharBuffer tmpCharBuffer = tmpBuffer.asCharBuffer();
    tmpCharBuffer.put(tailBuffer.array(), 0, tailSize);
    tmpBuffer.rewind();
    channel.write(tmpBuffer);
    dataOutput.flush();
}