101 lines
4.5 KiB
C#
101 lines
4.5 KiB
C#
using System;
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using System.Text;
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using System.Collections.Generic;
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using System.IO;
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using System.IO.Compression;
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using System.Threading;
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using Microsoft.Win32;
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using System.Windows.Forms;
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using System.Diagnostics;
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namespace Saviour_Backup_System
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{
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class compression
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{
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private static List<Thread> threads = new List<Thread>();
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private volatile static string Gdirectory;
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private volatile static string GfileName;
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public static void Compress(string directory, string outputFile, DriveInfo drive) {
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GfileName = outputFile; Gdirectory = directory; //store as globals
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compressToZip();
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if (has7Zip()) {
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DialogResult result = MessageBox.Show("7-Zip has been detected on your computer, Using this will dramatically improve compression time.\nWould you like to use this instead?", "Use 7-Zip?", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
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if (result == DialogResult.No) {
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threads.Add(new Thread(new ThreadStart(compression7Zip)));
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threads[threads.Count].Start();
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} else {
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interface7Zip();
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}
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} else {
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interface7Zip();
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}
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MessageBox.Show("Compression for drive '" + drive.Name + "' has completed.", "Compression Completed", MessageBoxButtons.OK, MessageBoxIcon.Information);
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}
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private static void interface7Zip() {
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string fileDirectory = get7ZipDirectory() + "\\7z.exe";
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Process.Start("\"" + fileDirectory + "\" a -y -i \"" + Gdirectory + GfileName + ".zip\" \"" + Gdirectory.Replace("\\Temp", "\\") + GfileName + ".sbf");
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}
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private static void compression7Zip() {
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string fileToCompress = Gdirectory + GfileName + ".zip";
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string outputFile = Gdirectory.Replace("\\Temp", GfileName + ".SB");
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MessageBox.Show("Compression of your drive has begun. Be aware this can take a lot of time to run!", "Compression Notification", MessageBoxButtons.OK, MessageBoxIcon.Information);
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CompressFileLZMA(fileToCompress, outputFile);
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}
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private static void compressToZip() {
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ZipFile.CreateFromDirectory(Gdirectory, Gdirectory + GfileName + ".zip"); //create the zip file inside the temp directory still.
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}
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/// <summary>
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/// Compresses a file using LZMA compression
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/// </summary>
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/// <param name="inFile">Input File for compression</param>
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/// <param name="outFile">Compressed file name</param>
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private static void CompressFileLZMA(string inFile, string outFile)
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{
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SevenZip.Compression.LZMA.Encoder coder = new SevenZip.Compression.LZMA.Encoder();
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FileStream input = new FileStream(inFile, FileMode.Open);
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FileStream output = new FileStream(outFile, FileMode.Create);
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// Write the encoder properties
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coder.WriteCoderProperties(output);
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// Write the decompressed file size.
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output.Write(BitConverter.GetBytes(input.Length), 0, 8);
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// Encode the file.
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coder.Code(input, output, input.Length, -1, null);
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output.Flush();
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output.Close();
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}
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private static void DecompressFileLZMA(string inFile, string outFile)
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{
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SevenZip.Compression.LZMA.Decoder coder = new SevenZip.Compression.LZMA.Decoder();
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FileStream input = new FileStream(inFile, FileMode.Open);
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FileStream output = new FileStream(outFile, FileMode.Create);
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// Read the decoder properties
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byte[] properties = new byte[5];
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input.Read(properties, 0, 5);
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// Read in the decompress file size.
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byte[] fileLengthBytes = new byte[8];
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input.Read(fileLengthBytes, 0, 8);
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long fileLength = BitConverter.ToInt64(fileLengthBytes, 0);
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coder.SetDecoderProperties(properties);
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coder.Code(input, output, input.Length, fileLength, null);
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output.Flush();
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output.Close();
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}
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private static bool has7Zip() {
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string path = (string) Registry.GetValue("HKEY_LOCAL_MACHINE\\SOFTWARE\\7-Zip", "Path", "NULL");
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if (path == "NULL") { return false;}
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return File.Exists(path + "7z.exe");
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}
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private static string get7ZipDirectory() { return (string) Registry.GetValue("HKEY_LOCAL_MACHINE\\SOFTWARE\\7-Zip", "Path", "NULL"); }
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}
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}
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