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saviour-backup-system/Saviour Backup System/compression.cs
2015-02-06 13:16:51 +00:00

101 lines
4.5 KiB
C#

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