1.基本數(shù)據(jù)類型

• 整型

  • byte 1字節(jié) 8bit
  • short 2字節(jié)
  • int 4字節(jié)
  • long 32位機(jī)器 4字節(jié) 64位機(jī)器 8字節(jié)

• 浮點(diǎn)型

  • float 4字節(jié) 小數(shù)點(diǎn)后6-7位
  • double 8字節(jié) 小數(shù)點(diǎn)后15-16位
  • decimal

• bool 1字節(jié)

• char java/C# 2字節(jié) C/C++ 1字節(jié)

• GBK 包含所有的亞洲字體庫(kù)

• UTF-8 1-4字節(jié)

2. 類轉(zhuǎn)字節(jié)流

• MMORPG: C/S 架構(gòu), 狀態(tài)同步, 絕大部分?jǐn)?shù)據(jù)都來(lái)自服務(wù)器
• Moba: 幀同步
• 網(wǎng)絡(luò)通信的時(shí)候: 必須是字節(jié)流

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class CPractice : MonoBehaviour
{
    private void Start()
    {
        Person p = new Person();

        byte[] pBytes = p.ConvertToBytes();

        Person xiaoming = new Person();
        xiaoming.ConvertFromBytes(pBytes);

        Debug.Log(xiaoming);
    }
}

public class Person
{
    public byte age;        // 1byte
    public bool sex;        // true 男 false 女 1byte
    public short height;    // 2byte
    public float weight;    // 4byte

    public Person()
    {
        age = 18;
        sex = false;
        height = 165;
        weight = 100;
    }

    /// <summary>
    /// 將類變成二進(jìn)制流
    /// </summary>
    /// 從上到下依次存
    /// <returns>The to bytes.</returns>
    public byte[] ConvertToBytes()
    {
        byte[] result = new byte[8];
        byte tmpOffset = 0;

        result[0] = age;
        tmpOffset += 1;

        byte[] sexBytes = BitConverter.GetBytes(sex);
        result[1] = sexBytes[0];
        tmpOffset += 1;

        byte[] heightBytes = BitConverter.GetBytes(height);
        Buffer.BlockCopy(heightBytes, 0, result, tmpOffset, heightBytes.Length);    // 相當(dāng)于C/C++中的memcpy
        tmpOffset += (byte)heightBytes.Length;

        byte[] weightBytes = BitConverter.GetBytes(weight);
        Buffer.BlockCopy(weightBytes, 0, result, tmpOffset, weightBytes.Length);

        return result;
    }

    /// <summary>
    /// 將二進(jìn)制流轉(zhuǎn)成類
    /// </summary>
    /// <param name="buffer">Buffer.</param>
    public void ConvertFromBytes(byte[] buffer)
    {
        age = buffer[0];
        sex = BitConverter.ToBoolean(buffer, 1);
        height = BitConverter.ToInt16(buffer, 2);
        weight = BitConverter.ToSingle(buffer, 4);
    }

    public override string ToString()
    {
        System.Text.StringBuilder stringBuilder = new System.Text.StringBuilder("");
        stringBuilder.Append("age : " + age + "\n");
        stringBuilder.Append("sex : " + sex + "\n");
        stringBuilder.Append("height : " + height + "\n");
        stringBuilder.Append("weight : " + weight + "\n");

        return stringBuilder.ToString();
    }
}