void RestoreBackup()
{
BinaryReader r = new BinaryReader(Stream);
BackupEntry[] entries;
//Read header
int version = r.ReadInt32(); //File version
r.ReadInt32(); //Reserved
r.ReadInt32(); //Reserved
int countOfEntries = r.ReadInt32(); //Count of BackupEntries
entries = new BackupEntry[countOfEntries];
//Read entries
for (int i = 0; i < countOfEntries; i++)
{
entries[i] = ReadEntry(r);
}
//Read files
if (version == 0)
{
foreach (BackupEntry e in entries)
{
RestoreFile(r, e, Destination);
}
}
}
/// <summary>
/// Writes file
/// </summary>
/// <param name="e">Entry containing informations about file</param>
/// <param name="w">Stream</param>
void WriteFile(BackupEntry e, BinaryWriter w)
{
FileStream s = new FileStream(e.FullName, FileMode.Open);
byte[] File = new byte[s.Length];
//Get file content
for (int i = 0; i < s.Length; i++)
{
//Read byte
int b = s.ReadByte();
//If end of stream, break loop
if (b == -1)
{
break;
}
//Add byte
File[i] = (byte)b;
}
//Write file
foreach (byte b in File)
{
w.Write(b);
}
//Close and dispose stream
s.Close();
s.Dispose();
}
BackupEntry ReadEntry(BinaryReader r)
{
//Read entry
BackupEntry entry = new BackupEntry();
entry.FileName = r.ReadString();
entry.Length = r.ReadInt32();
entry.Offset = r.ReadInt32();
//Return entry
return(entry);
}
/// <summary>
/// Creates entries
/// </summary>
/// <param name="FileNames">Names of files to backup</param>
/// <returns></returns>
List <BackupEntry> CreateEntries(List <string> FileNames)
{
List <BackupEntry> entries = new List <BackupEntry>();
//Create entries
foreach (string filename in FileNames)
{
//Get informations about file
FileInfo f = new FileInfo(filename);
BackupEntry e = new BackupEntry();
//Set values
e.FileName = f.Name;
e.FullName = f.FullName;
e.Length = (int)f.Length;
//Add entry
entries.Add(e);
}
return(entries);
}
/// <summary>
/// Restores file from backup
/// </summary>
/// <param name="r">BinaryReader of backup file</param>
/// <param name="e">BackupEntry used to get informations about file</param>
/// <param name="directory">Destination directory of file</param>
void RestoreFile(BinaryReader r, BackupEntry e, string directory)
{
string filename = Path.Combine(directory, e.FileName);
using (FileStream fs = new FileStream(filename, FileMode.Create))
{
using (BinaryWriter w = new BinaryWriter(fs))
{
//Set offset [Skipped]
//Reason: Unnecessary
//r.BaseStream.Position = e.Offset;
//Read bytes
byte[] data = r.ReadBytes(e.Length);
//Write data
foreach (byte b in data)
{
w.Write(b);
}
}
}
}
/// <summary>
/// Writes entry
/// </summary>
/// <param name="e">Entry to write</param>
/// <param name="w">Stream</param>
void WriteEntry(BackupEntry e, BinaryWriter w)
{
w.Write(e.FileName);
w.Write(e.Length);
w.Write(e.Offset);
}
