ylsj/Assets/GameFramework/Scripts/Runtime/Resource/BuiltinVersionListSerializer.UpdatableVersionListTryGetValueCallback.cs

//------------------------------------------------------------
// Game Framework
// Copyright © 2013-2021  loyalsoft. All rights reserved.
// Homepage: http://www.game7000.com/
// Feedback: http://www.game7000.com/
//------------------------------------------------------------

using System.IO;
using System.Text;

namespace UnityGameFramework.Runtime
{
    /// <summary>
    /// 内置版本资源列表序列化器。
    /// </summary>
    public static partial class BuiltinVersionListSerializer
    {
        /// <summary>
        /// 尝试从可更新模式版本资源列表（版本 0）获取指定键的值回调函数。
        /// </summary>
        /// <param name="stream">指定流。</param>
        /// <param name="key">指定键。</param>
        /// <param name="value">指定键的值。</param>
        /// <returns>从可更新模式版本资源列表（版本 0）获取指定键的值是否成功。</returns>
        public static bool UpdatableVersionListTryGetValueCallback_V0(Stream stream, string key, out object value)
        {
            value = null;
            if (key != "InternalResourceVersion")
            {
                return false;
            }

            using (BinaryReader binaryReader = new BinaryReader(stream, Encoding.UTF8))
            {
                binaryReader.BaseStream.Position += CachedHashBytesLength;
                byte stringLength = binaryReader.ReadByte();
                binaryReader.BaseStream.Position += stringLength;
                value = binaryReader.ReadInt32();
            }

            return true;
        }

        /// <summary>
        /// 尝试从可更新模式版本资源列表（版本 1 或版本 2）获取指定键的值回调函数。
        /// </summary>
        /// <param name="stream">指定流。</param>
        /// <param name="key">指定键。</param>
        /// <param name="value">指定键的值。</param>
        /// <returns>从可更新模式版本资源列表（版本 1 或版本 2）获取指定键的值是否成功。</returns>
        public static bool UpdatableVersionListTryGetValueCallback_V1_V2(Stream stream, string key, out object value)
        {
            value = null;
            if (key != "InternalResourceVersion")
            {
                return false;
            }

            using (BinaryReader binaryReader = new BinaryReader(stream, Encoding.UTF8))
            {
                binaryReader.BaseStream.Position += CachedHashBytesLength;
                byte stringLength = binaryReader.ReadByte();
                binaryReader.BaseStream.Position += stringLength;
                value = binaryReader.Read7BitEncodedInt32();
            }

            return true;
        }
    }
}