static void Main(string[] args)
{
int[] arr = new int[] { 1, 3, 4, 6, 10, 100 };
BinFileWriter.CreateFile(arr, "test.bin");
BinFileReader.ReadFile("test.bin");
Console.WriteLine("Press any key to continue.");
Console.ReadKey();
}
/// <summary>
/// Method for compressing data from BinFileReader and write into BinFileWriter
/// </summary>
private void Compress()
{
this.BinFileReader.BaseStream.Position = 0;
this.BinFileWriter.BaseStream.Position = 0;
BinFileWriter.Write((UInt16)0);
this.PreviousStructInStream = 0;
this.SlidingWindow = new System.Collections.Generic.List <byte>();
for (; this.BinFileReader.BaseStream.Position < this.BinFileReader.BaseStream.Length;)
{
/// Запомнили стартовую позицию указателя
this.StreamPositionBuffer = this.BinFileReader.BaseStream.Position;
this.IndexOfEquals = null;
this.IsLast = false;
this.Offset = 0;
/// Читаем символ, и проверяем соответствие в скользящем окне
for (; this.BinFileReader.BaseStream.Position < this.BinFileReader.BaseStream.Length;)
{
this.ReadedByte = this.BinFileReader.ReadByte();
/// Подготовка списка кондидитов на удаление для текущей итерации
this.IndexForRemove = new System.Collections.Generic.List <int>();
/// Создание буфера соответствий
if (this.IndexOfEquals == null)
{
this.IndexOfEquals = new System.Collections.Generic.List <Int32>();
this.IndexOfEquals = this.SlidingWindow.Select((x, i) => (x == this.ReadedByte) ? i : -1).Where(x => x != -1).ToList();
/// Не найдено не одного соответствия
/// = Заход в первый раз.
if (this.IndexOfEquals.Count < 1)
{
++this.Offset;
break;
}
}
else
{
foreach (Int32 x in IndexOfEquals)
{
/// Если не достигнут конец скользящего окна
if ((x + this.Offset) < SlidingWindow.Count)
{
/// Если элемент в окне не соответствует считанному с потока
if (this.SlidingWindow[x + this.Offset] != this.ReadedByte)
{
/// Помечаем как кондидат на удаление
this.IndexForRemove.Add(x);
}
}
else
{
/// Помечаем как кондидат на удаление
this.IndexForRemove.Add(x);
}
}
this.HelpDeleateOffset = 0;
foreach (Int32 x in IndexForRemove)
{
/// Если индекс последний
if (IndexOfEquals.Count() <= 1)
{
this.IsLast = true;
break;
}
else
{
this.IndexOfEquals.Remove(x);
++this.HelpDeleateOffset;
continue;
}
}
}
if (IsLast)
{
break;
}
++this.Offset;
}
/// Не пишим промежуточные(дополнительные отметки)
if (this.Offset > (Method.MinArchivingCount - 1))
{
this.BinFileReader.BaseStream.Position = this.StreamPositionBuffer;
this.InputByteBuffer = this.BinFileReader.ReadBytes(this.Offset);
//BinFileWriter.Write((UInt16)0);
this.BinFileWriter.BaseStream.Position = this.PreviousStructInStream;
this.BinFileWriter.Write((UInt16)(this.BinFileWriter.BaseStream.Length - 4 - this.BinFileWriter.BaseStream.Position));
this.BinFileWriter.BaseStream.Position = this.BinFileWriter.BaseStream.Length;
this.PreviousStructInStream = this.BinFileWriter.BaseStream.Length;
BinFileWriter.Write((UInt16)0);
BinFileWriter.Write((UInt16)this.IndexOfEquals[0]);
BinFileWriter.Write((UInt16)this.Offset);
/*
* this.BinFileWriter.BaseStream.Position = this.PreviousStructInStream;
* /// 4 = 2 * Sizeof(BufferLengthByte)
* this.BinFileWriter.Write((UInt16)(this.BinFileWriter.BaseStream.Length - 4 - this.BinFileWriter.BaseStream.Position));
* /// 2 = Sizeof(BufferLengthByte)
* this.BinFileWriter.BaseStream.Position = this.BinFileWriter.BaseStream.Length;
* this.PreviousStructInStream = this.BinFileWriter.BaseStream.Position - 2;
*
* BinFileWriter.Write((UInt16)this.IndexOfEquals[0]);
* BinFileWriter.Write((UInt16)this.Offset);*////?qwe_??qwsa
/*
* this.IndexOfEquals.Add((UInt16)(this.BinFileWriter.BaseStream.Position - this.PreviousStructInStream));
* this.StreamPositionBuffer = this.BinFileWriter.BaseStream.Position;
* this.BinFileWriter.BaseStream.Position = this.PreviousStructInStream;
* this.BinFileWriter.Write(this.IndexOfEquals.Last().ToString());
* this.BinFileWriter.BaseStream.Position = this.StreamPositionBuffer + 1;
* this.PreviousStructInStream = this.StreamPositionBuffer - 1;
*/
/// Запись в скользящее окно
this.SlidingWindow.AddRange(InputByteBuffer);
if (this.SlidingWindow.Count - Method.BufferLengthByte > 0)
{
this.SlidingWindow.RemoveRange(0, (this.SlidingWindow.Count) - Method.BufferLengthByte);
}
this.IndexOfEquals.Clear();
}
else
{
this.BinFileReader.BaseStream.Position = this.StreamPositionBuffer;
/// Чтение знаков из входного потока
this.InputByteBuffer = this.BinFileReader.ReadBytes(this.Offset);
/// Запись в выходной
this.BinFileWriter.Write(InputByteBuffer);
/// Запись в скользящее окно
this.SlidingWindow.AddRange(this.InputByteBuffer);
/// Чтобы не вылетал, когда не заполнен под завязку
if (this.SlidingWindow.Count - Method.BufferLengthByte > 0)
{
this.SlidingWindow.RemoveRange(0, this.SlidingWindow.Count - Method.BufferLengthByte);
}
this.IndexOfEquals.Clear();
}
}
}
