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- //------------------------------------------------------------
- // Game Framework
- // Copyright © 2013-2021 loyalsoft. All rights reserved.
- // Homepage: http://www.game7000.com/
- // Feedback: http://www.game7000.com/
- //------------------------------------------------------------
- using System;
- namespace GameFramework
- {
- public static partial class Utility
- {
- /// <summary>
- /// Marshal 相关的实用函数。
- /// </summary>
- public static class Marshal
- {
- private const int BlockSize = 1024 * 4;
- private static IntPtr s_CachedHGlobalPtr = IntPtr.Zero;
- private static int s_CachedHGlobalSize = 0;
- /// <summary>
- /// 获取缓存的从进程的非托管内存中分配的内存的大小。
- /// </summary>
- public static int CachedHGlobalSize
- {
- get
- {
- return s_CachedHGlobalSize;
- }
- }
- /// <summary>
- /// 确保从进程的非托管内存中分配足够大小的内存并缓存。
- /// </summary>
- /// <param name="ensureSize">要确保从进程的非托管内存中分配内存的大小。</param>
- public static void EnsureCachedHGlobalSize(int ensureSize)
- {
- if (ensureSize < 0)
- {
- throw new GameFrameworkException("Ensure size is invalid.");
- }
- if (s_CachedHGlobalPtr == IntPtr.Zero || s_CachedHGlobalSize < ensureSize)
- {
- FreeCachedHGlobal();
- int size = (ensureSize - 1 + BlockSize) / BlockSize * BlockSize;
- s_CachedHGlobalPtr = System.Runtime.InteropServices.Marshal.AllocHGlobal(size);
- s_CachedHGlobalSize = size;
- }
- }
- /// <summary>
- /// 释放缓存的从进程的非托管内存中分配的内存。
- /// </summary>
- public static void FreeCachedHGlobal()
- {
- if (s_CachedHGlobalPtr != IntPtr.Zero)
- {
- System.Runtime.InteropServices.Marshal.FreeHGlobal(s_CachedHGlobalPtr);
- s_CachedHGlobalPtr = IntPtr.Zero;
- s_CachedHGlobalSize = 0;
- }
- }
- /// <summary>
- /// 将数据从对象转换为二进制流。
- /// </summary>
- /// <typeparam name="T">要转换的对象的类型。</typeparam>
- /// <param name="structure">要转换的对象。</param>
- /// <returns>存储转换结果的二进制流。</returns>
- public static byte[] StructureToBytes<T>(T structure)
- {
- return StructureToBytes(structure, System.Runtime.InteropServices.Marshal.SizeOf(typeof(T)));
- }
- /// <summary>
- /// 将数据从对象转换为二进制流。
- /// </summary>
- /// <typeparam name="T">要转换的对象的类型。</typeparam>
- /// <param name="structure">要转换的对象。</param>
- /// <param name="structureSize">要转换的对象的大小。</param>
- /// <returns>存储转换结果的二进制流。</returns>
- internal static byte[] StructureToBytes<T>(T structure, int structureSize)
- {
- if (structureSize < 0)
- {
- throw new GameFrameworkException("Structure size is invalid.");
- }
- EnsureCachedHGlobalSize(structureSize);
- System.Runtime.InteropServices.Marshal.StructureToPtr(structure, s_CachedHGlobalPtr, true);
- byte[] result = new byte[structureSize];
- System.Runtime.InteropServices.Marshal.Copy(s_CachedHGlobalPtr, result, 0, structureSize);
- return result;
- }
- /// <summary>
- /// 将数据从对象转换为二进制流。
- /// </summary>
- /// <typeparam name="T">要转换的对象的类型。</typeparam>
- /// <param name="structure">要转换的对象。</param>
- /// <param name="result">存储转换结果的二进制流。</param>
- public static void StructureToBytes<T>(T structure, byte[] result)
- {
- StructureToBytes(structure, System.Runtime.InteropServices.Marshal.SizeOf(typeof(T)), result, 0);
- }
- /// <summary>
- /// 将数据从对象转换为二进制流。
- /// </summary>
- /// <typeparam name="T">要转换的对象的类型。</typeparam>
- /// <param name="structure">要转换的对象。</param>
- /// <param name="structureSize">要转换的对象的大小。</param>
- /// <param name="result">存储转换结果的二进制流。</param>
- internal static void StructureToBytes<T>(T structure, int structureSize, byte[] result)
- {
- StructureToBytes(structure, structureSize, result, 0);
- }
- /// <summary>
- /// 将数据从对象转换为二进制流。
- /// </summary>
- /// <typeparam name="T">要转换的对象的类型。</typeparam>
- /// <param name="structure">要转换的对象。</param>
- /// <param name="result">存储转换结果的二进制流。</param>
- /// <param name="startIndex">写入存储转换结果的二进制流的起始位置。</param>
- public static void StructureToBytes<T>(T structure, byte[] result, int startIndex)
- {
- StructureToBytes(structure, System.Runtime.InteropServices.Marshal.SizeOf(typeof(T)), result, startIndex);
- }
- /// <summary>
- /// 将数据从对象转换为二进制流。
- /// </summary>
- /// <typeparam name="T">要转换的对象的类型。</typeparam>
- /// <param name="structure">要转换的对象。</param>
- /// <param name="structureSize">要转换的对象的大小。</param>
- /// <param name="result">存储转换结果的二进制流。</param>
- /// <param name="startIndex">写入存储转换结果的二进制流的起始位置。</param>
- internal static void StructureToBytes<T>(T structure, int structureSize, byte[] result, int startIndex)
- {
- if (structureSize < 0)
- {
- throw new GameFrameworkException("Structure size is invalid.");
- }
- if (result == null)
- {
- throw new GameFrameworkException("Result is invalid.");
- }
- if (startIndex < 0)
- {
- throw new GameFrameworkException("Start index is invalid.");
- }
- if (startIndex + structureSize > result.Length)
- {
- throw new GameFrameworkException("Result length is not enough.");
- }
- EnsureCachedHGlobalSize(structureSize);
- System.Runtime.InteropServices.Marshal.StructureToPtr(structure, s_CachedHGlobalPtr, true);
- System.Runtime.InteropServices.Marshal.Copy(s_CachedHGlobalPtr, result, startIndex, structureSize);
- }
- /// <summary>
- /// 将数据从二进制流转换为对象。
- /// </summary>
- /// <typeparam name="T">要转换的对象的类型。</typeparam>
- /// <param name="buffer">要转换的二进制流。</param>
- /// <returns>存储转换结果的对象。</returns>
- public static T BytesToStructure<T>(byte[] buffer)
- {
- return BytesToStructure<T>(System.Runtime.InteropServices.Marshal.SizeOf(typeof(T)), buffer, 0);
- }
- /// <summary>
- /// 将数据从二进制流转换为对象。
- /// </summary>
- /// <typeparam name="T">要转换的对象的类型。</typeparam>
- /// <param name="buffer">要转换的二进制流。</param>
- /// <param name="startIndex">读取要转换的二进制流的起始位置。</param>
- /// <returns>存储转换结果的对象。</returns>
- public static T BytesToStructure<T>(byte[] buffer, int startIndex)
- {
- return BytesToStructure<T>(System.Runtime.InteropServices.Marshal.SizeOf(typeof(T)), buffer, startIndex);
- }
- /// <summary>
- /// 将数据从二进制流转换为对象。
- /// </summary>
- /// <typeparam name="T">要转换的对象的类型。</typeparam>
- /// <param name="structureSize">要转换的对象的大小。</param>
- /// <param name="buffer">要转换的二进制流。</param>
- /// <returns>存储转换结果的对象。</returns>
- internal static T BytesToStructure<T>(int structureSize, byte[] buffer)
- {
- return BytesToStructure<T>(structureSize, buffer, 0);
- }
- /// <summary>
- /// 将数据从二进制流转换为对象。
- /// </summary>
- /// <typeparam name="T">要转换的对象的类型。</typeparam>
- /// <param name="structureSize">要转换的对象的大小。</param>
- /// <param name="buffer">要转换的二进制流。</param>
- /// <param name="startIndex">读取要转换的二进制流的起始位置。</param>
- /// <returns>存储转换结果的对象。</returns>
- internal static T BytesToStructure<T>(int structureSize, byte[] buffer, int startIndex)
- {
- if (structureSize < 0)
- {
- throw new GameFrameworkException("Structure size is invalid.");
- }
- if (buffer == null)
- {
- throw new GameFrameworkException("Buffer is invalid.");
- }
- if (startIndex < 0)
- {
- throw new GameFrameworkException("Start index is invalid.");
- }
- if (startIndex + structureSize > buffer.Length)
- {
- throw new GameFrameworkException("Buffer length is not enough.");
- }
- EnsureCachedHGlobalSize(structureSize);
- System.Runtime.InteropServices.Marshal.Copy(buffer, startIndex, s_CachedHGlobalPtr, structureSize);
- return (T)System.Runtime.InteropServices.Marshal.PtrToStructure(s_CachedHGlobalPtr, typeof(T));
- }
- }
- }
- }
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