* FastLZ: 增加了扩展的自定义压缩解压方法
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Sunny
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5e09012ad7
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BIN
SunnyUI/Common/FastLZx64.dat
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SunnyUI/Common/FastLZx64.dat
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SunnyUI/Common/FastLZx86.dat
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SunnyUI/Common/FastLZx86.dat
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@ -25,6 +25,8 @@
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* compressed form.
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*
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* 2022-03-31: V3.1.2 增加文件说明
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* 2022-07-07: V3.2.1 增加了扩展的自定义压缩解压方法
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* 2022-07-07: V3.2.1 增加内置FastLZx86.dll、FastLZx64.dll资源文件
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******************************************************************************
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* 压缩函数
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* int fastlz_compress_level(int level, const void* input, int length, void* output);
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@ -53,11 +55,23 @@
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******************************************************************************
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* 扩展CompressEx，DecompressEx
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* 扩展压缩结果增加16个字节头部和8个字节尾部，以!开头，\r\n结尾
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* 16个字节头部:8字节标识(!FastLZ )+4字节(输出缓冲区的所能容纳的最大长度maxout)+4字节(当前数据大小)
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* 8个字节尾部:4字节(保留)+1字节(*)+1字节(CRC,累加和,0不判断)+2字节(\r\n)
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* 20个字节头部:
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* 4字节标识(!FLZ)
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* 4字节时间戳高位，精确到秒Seconds，这是Unix时间戳，以Jan1st1970开始的秒数（可空）
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* 4字节时间戳低位，能够精确到毫秒Milliseconds（可空）
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* 4字节(输出缓冲区的所能容纳的最大长度maxout)
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* 4字节(当前数据大小)
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* 8个字节尾部:
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* 4字节序号（可空）
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* 1字节(*)
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* 1字节(CRC,累加和,0不判断)
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* 2字节(\r\n)
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******************************************************************************
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* FastLZx86.dll、FastLZx64.dll见项目 https://gitee.com/yhuse/SunnyUI.FastLZ
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******************************************************************************/
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using System;
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using System.IO;
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using System.Runtime.InteropServices;
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namespace Sunny.UI
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@ -168,9 +182,35 @@ namespace Sunny.UI
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}
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}
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private static byte[] ExHead = "!FastLZ".ToEnBytes(8);
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private const int ExHeadAllLength = 16;
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private static byte[] ExHead = "!FLZ".ToEnBytes(4);
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private const int ExHeadAllLength = 20;
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private const int ExTailAllLength = 8;
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private static DateTime Jan1st1970 = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
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/// <summary>
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/// 压缩(扩展）
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/// </summary>
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/// <param name="input">输入</param>
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/// <param name="begin">起始位置</param>
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/// <param name="length">长度</param>
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/// <param name="datetime">时间</param>
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/// <param name="index">索引</param>
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/// <returns>压缩结果</returns>
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public static byte[] CompressEx(byte[] input, int begin, int length, DateTime dateTime, int index)
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{
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byte[] result = CompressEx(input, begin, length);
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if (result.Length > 0)
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{
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TimeSpan span = dateTime - Jan1st1970;
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int totalSeconds = (int)span.TotalSeconds;
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int milliseconds = span.Milliseconds;
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Array.Copy(BitConverter.GetBytes(totalSeconds), 0, result, 4, 4);
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Array.Copy(BitConverter.GetBytes(milliseconds), 0, result, 8, 4);
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Array.Copy(BitConverter.GetBytes(index), 0, result, result.Length - 8, 4);
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}
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return result;
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}
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/// <summary>
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/// 压缩(扩展）
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@ -189,18 +229,21 @@ namespace Sunny.UI
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{
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int outlen = Is64bitApp() ? FastLZx64.FastLZ_Compress(pSrc1, length, pSrc2) : FastLZx86.FastLZ_Compress(pSrc1, length, pSrc2);
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result = new byte[outlen + ExHeadAllLength + ExTailAllLength];
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Array.Copy(ExHead, 0, result, 0, ExHead.Length);
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Array.Copy(BitConverter.GetBytes((int)output.Length), 0, result, 8, 4);
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Array.Copy(BitConverter.GetBytes((int)outlen), 0, result, 12, 4);
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Array.Copy(output, 0, result, 16, outlen);
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result[result.Length - 1 - 7] = 0; //保留
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result[result.Length - 1 - 6] = 0; //保留
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result[result.Length - 1 - 5] = 0; //保留
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result[result.Length - 1 - 4] = 0; //保留
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result[result.Length - 1 - 3] = 42; //*
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result[result.Length - 1 - 2] = 0; //CRC
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result[result.Length - 1 - 1] = 13; //\r
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result[result.Length - 1 - 0] = 10; //\n
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Array.Copy(BitConverter.GetBytes((int)0), 0, result, 4, 4);
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Array.Copy(BitConverter.GetBytes((int)0), 0, result, 8, 4);
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Array.Copy(BitConverter.GetBytes((int)output.Length), 0, result, 12, 4);
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Array.Copy(BitConverter.GetBytes((int)outlen), 0, result, 16, 4);
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Array.Copy(output, 0, result, ExHeadAllLength, outlen);
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Array.Copy(BitConverter.GetBytes((int)0), 0, result, result.Length - 8, 4);
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result[result.Length - 4] = 42; //*
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result[result.Length - 3] = 0; //CRC
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result[result.Length - 2] = 13; //\r
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result[result.Length - 1] = 10; //\n
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return result;
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}
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}
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@ -219,7 +262,7 @@ namespace Sunny.UI
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if (begin + length > input.Length) return result;
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if (input[begin] != 33) return result;
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if (input[begin + length - 4] != 42) return result;
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if (length != BitConverter.ToInt32(input, begin + 12) + ExHeadAllLength + ExTailAllLength) return result;
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if (length != BitConverter.ToInt32(input, begin + 16) + ExHeadAllLength + ExTailAllLength) return result;
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byte[] output = new byte[BitConverter.ToInt32(input, begin + ExHead.Length)];
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fixed (byte* pSrc1 = &input[begin + ExHeadAllLength])
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@ -232,5 +275,67 @@ namespace Sunny.UI
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return result;
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}
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}
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/// <summary>
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/// 解压缩(扩展）
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/// </summary>
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/// <param name="input">输入</param>
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/// <param name="begin">起始位置</param>
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/// <param name="length">长度</param>
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/// <param name="datetime">时间</param>
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/// <param name="index">索引</param>
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/// <returns>解压缩结果</returns>
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public static byte[] DecompressEx(byte[] input, int begin, int length, out DateTime datetime, out int index)
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{
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byte[] result = DecompressEx(input, begin, length);
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datetime = Jan1st1970;
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index = 0;
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if (result.Length > 0)
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{
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datetime = Jan1st1970.AddSeconds(BitConverter.ToInt32(input, begin + 4)).AddMilliseconds(BitConverter.ToInt32(input, begin + 8));
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index = BitConverter.ToInt32(input, begin + length - 8);
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}
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return result;
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}
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public static bool CheckFastLZDll()
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{
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if (File.Exists(DirEx.CurrentDir() + "FastLZx86.dll") && File.Exists(DirEx.CurrentDir() + "FastLZx64.dll")) return true;
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try
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{
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CreateResourceToFile(DirEx.CurrentDir() + "FastLZx86.dll", "Sunny.UI.Common.FastLZx86.dat");
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CreateResourceToFile(DirEx.CurrentDir() + "FastLZx64.dll", "Sunny.UI.Common.FastLZx64.dat");
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}
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catch
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{
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return false;
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}
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return File.Exists(DirEx.CurrentDir() + "FastLZx86.dll") && File.Exists(DirEx.CurrentDir() + "FastLZx64.dll");
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}
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/// <summary>
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/// 从系统资源中保存字体文件
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/// </summary>
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/// <param name="file">字体文件名</param>
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/// <param name="resource">资源名称</param>
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private static void CreateResourceToFile(string file, string resource)
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{
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if (!File.Exists(file))
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{
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Stream fontStream = System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream(resource);
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if (fontStream != null)
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{
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byte[] buffer = new byte[fontStream.Length];
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fontStream.Read(buffer, 0, (int)fontStream.Length);
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fontStream.Close();
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File.WriteAllBytes(file, buffer);
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}
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}
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}
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}
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}
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@ -36,6 +36,11 @@
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<DocumentationFile></DocumentationFile>
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</PropertyGroup>
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<ItemGroup>
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<None Remove="Common\FastLZx64.dat" />
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<None Remove="Common\FastLZx86.dat" />
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</ItemGroup>
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<ItemGroup>
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<None Include="..\LICENSE">
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<Pack>True</Pack>
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@ -48,6 +53,8 @@
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</ItemGroup>
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<ItemGroup>
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<EmbeddedResource Include="Common\FastLZx64.dat" />
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<EmbeddedResource Include="Common\FastLZx86.dat" />
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<EmbeddedResource Include="Font\ElegantIcons.ttf" />
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<EmbeddedResource Include="Font\fa-brands-400.ttf" />
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<EmbeddedResource Include="Font\fa-regular-400.ttf" />
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