content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *    http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package io.netty.buffer;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.nio.charset.StandardCharsets;
  import org.junit.jupiter.api.Test;
  
  public class TestUnsafeDirectLittleEndian {
  
    @Test
    @SuppressWarnings("CatchAndPrintStackTrace")
    public void testPrimitiveGetSet() {
      ByteBuf byteBuf = Unpooled.directBuffer(64);
      UnsafeDirectLittleEndian unsafeDirect = getUnsafeDirectLittleEndian(byteBuf);
  
      assertEquals(Byte.MAX_VALUE, unsafeDirect.getByte(0));
      assertEquals(-1, unsafeDirect.getByte(1));
      assertEquals(Short.MAX_VALUE, unsafeDirect.getShort(2));
      assertEquals(-2, unsafeDirect.getShort(4));
      assertEquals((char) 65534, unsafeDirect.getChar(4));
      assertEquals(Integer.MAX_VALUE, unsafeDirect.getInt(8));
      assertEquals(-66052, unsafeDirect.getInt(12));
      assertEquals(4294901244L, unsafeDirect.getUnsignedInt(12));
      assertEquals(Long.MAX_VALUE, unsafeDirect.getLong(16));
      assertEquals(-4295098372L, unsafeDirect.getLong(24));
      assertEquals(1.23F, unsafeDirect.getFloat(32), 0.0);
      assertEquals(-1.23F, unsafeDirect.getFloat(36), 0.0);
      assertEquals(1.234567D, unsafeDirect.getDouble(40), 0.0);
      assertEquals(-1.234567D, unsafeDirect.getDouble(48), 0.0);
  
      byte[] inBytes = "1234567".getBytes(StandardCharsets.UTF_8);
      try (ByteArrayInputStream bais = new ByteArrayInputStream(inBytes);
          ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
        assertEquals(5, unsafeDirect.setBytes(56, bais, 5));
        unsafeDirect.getBytes(56, baos, 5);
        assertEquals("12345", new String(baos.toByteArray(), StandardCharsets.UTF_8));
      } catch (IOException e) {
        e.printStackTrace();
      }
    }
  
    private static UnsafeDirectLittleEndian getUnsafeDirectLittleEndian(ByteBuf byteBuf) {
      UnsafeDirectLittleEndian unsafeDirect = new UnsafeDirectLittleEndian(new LargeBuffer(byteBuf));
  
      unsafeDirect.setByte(0, Byte.MAX_VALUE);
      unsafeDirect.setByte(1, -1); // 0xFF
      unsafeDirect.setShort(2, Short.MAX_VALUE);
      unsafeDirect.setShort(4, -2); // 0xFFFE
      unsafeDirect.setInt(8, Integer.MAX_VALUE);
      unsafeDirect.setInt(12, -66052); // 0xFFFE FDFC
      unsafeDirect.setLong(16, Long.MAX_VALUE);
      unsafeDirect.setLong(24, -4295098372L); // 0xFFFF FFFE FFFD FFFC
      unsafeDirect.setFloat(32, 1.23F);
      unsafeDirect.setFloat(36, -1.23F);
      unsafeDirect.setDouble(40, 1.234567D);
      unsafeDirect.setDouble(48, -1.234567D);
      return unsafeDirect;
    }
  }
  