public void Load()
{
if (!File.Exists(FileName))
{
throw new FileNotFoundException($"Could not find SHN File {FileName}.");
}
byte[] data;
using (var file = File.Open(FileName, FileMode.Open, FileAccess.Read, FileShare.Read))
{
var reader = new BinaryReader(file);
CryptHeader = reader.ReadBytes(32);
var Length = reader.ReadInt32() - 36; //minus int + header
data = reader.ReadBytes(Length);
FileCrypto.Crypt(data, 0, Length);
//File.WriteAllBytes("Output.dat", data); //debug purpose
}
using (var stream = new MemoryStream(data))
{
var reader = new SHNReader(stream);
Header = reader.ReadUInt32();
RecordCount = reader.ReadUInt32();
DefaultRecordLength = reader.ReadUInt32();
ColumnCount = reader.ReadUInt32();
GenerateColumns(reader);
GenerateRows(reader);
}
data = null;
}
private void InternalSave(string path)
{
try
{
isSaving = true;
UpdateDefaultRecordLength();
byte[] content;
using (MemoryStream encrypted = new MemoryStream())
{
SHNWriter writer = new SHNWriter(encrypted);
writer.Write(this.Header);
writer.Write((uint)this.Rows.Count);
writer.Write(this.DefaultRecordLength);
writer.Write((uint)this.Columns.Count);
WriteColumns(writer);
WriteRows(writer);
content = new byte[encrypted.Length];
encrypted.Seek(0, SeekOrigin.Begin);
encrypted.Read(content, 0, content.Length);
}
FileCrypto.Crypt(content, 0, content.Length);
using (FileStream final = File.Create(path))
{
BinaryWriter writer = new BinaryWriter(final);
writer.Write(CryptHeader);
writer.Write((int)(content.Length + 36));
writer.Write(content);
}
this.FileName = path;
if (OnSaveFinished != null)
{
OnSaveFinished.Invoke(this);
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message + ex.StackTrace);
if (OnSaveError != null)
{
OnSaveError.Invoke(this, ex.Message);
}
}
finally
{
isSaving = false;
}
}
private void InternalSave(string path)
{
try
{
isSaving = true;
UpdateDefaultRecordLength();
byte[] content;
using (var encrypted = new MemoryStream())
{
var writer = new SHNWriter(encrypted);
writer.Write(Header);
writer.Write((uint)Rows.Count);
writer.Write(DefaultRecordLength);
writer.Write((uint)Columns.Count);
WriteColumns(writer);
WriteRows(writer);
content = new byte[encrypted.Length];
encrypted.Seek(0, SeekOrigin.Begin);
encrypted.Read(content, 0, content.Length);
}
FileCrypto.Crypt(content, 0, content.Length);
using (var final = File.Create(path))
{
var writer = new BinaryWriter(final);
writer.Write(CryptHeader);
writer.Write(content.Length + 36);
writer.Write(content);
}
FileName = path;
OnSaveFinished?.Invoke(this);
}
catch (Exception ex)
{
Debug.WriteLine(ex + ex.StackTrace);
OnSaveError?.Invoke(this, ex.ToString());
}
finally
{
isSaving = false;
}
}
