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package com.tencent.mm.util;

import java.io.DataOutput;
import java.io.IOException;

public class ExtDataOutput extends DataOutputDelegate {

  public ExtDataOutput(DataOutput delegate) {
    super(delegate);
    // TODO Auto-generated constructor stub
  }

  public void writeIntArray(int[] array) throws IOException {
    int length = array.length;
    for (int i = 0; i < length; i++) {
      writeInt(array[i]);
    }
  }

  public void writeBytes(ExtDataInput in, int length) throws IOException {
    byte[] data = new byte[length];
    in.readFully(data);
    write(data);
  }

  public void writeCheckInt(int value, int expected) throws IOException {
    writeInt(value);
    if (value != expected) {
      throw new IOException(String.format("Expected: 0x%08x, got: 0x%08x", expected, value));
    }
  }

  public void writeCheckChunkTypeInt(ExtDataInput reader, int expected, int possible) throws IOException {
    int value = reader.readInt();
    writeInt(value);
    if (value == possible) {
      writeCheckChunkTypeInt(reader, expected, -1);
    } else if (value != expected) {
      throw new IOException(String.format("Expected: 0x%08x, got: 0x%08x", expected, value));
    }
  }

  public void writeCheckShort(short value, short expected) throws IOException {
    writeShort(value);
    if (value != expected) {
      throw new IOException(String.format("Expected: 0x%08x, got: 0x%08x", expected, value));
    }
  }

  public void writeCheckByte(byte value, byte expected) throws IOException {
    writeByte(value);
    if (value != expected) {
      throw new IOException(String.format("Expected: 0x%08x, got: 0x%08x", expected, value));
    }
  }
}