public TableVersion(int version, Field[] structure, PageFileIOMode mode)
{
Version = version;
Structure = structure;
Mode = mode;
for (int i = 0; i < Structure.Length; ++i)
{
var str = Structure[i];
str.Id = i;
str.Offset = RecordSize;
HasStorage |= str.IsStorage;
RecordSize += str.Size;
}
// crc32
if ((Mode & PageFileIOMode.CRC32) == PageFileIOMode.CRC32)
{
RecordSize += 4 /*crc32*/ + 8 /*last write date-time*/;
}
else
{
RecordSize += 8 /*last write date-time*/;
}
}
public PageFile(string fullPath, int pageSize, PageFileIOMode ioMode)
{
this.fullPath = fullPath;
this.pageSize = pageSize;
this.ioMode = ioMode;
Capacity = 1000;
locker = new ValueLock();
Key = fullPath.CalculateHashString();
poolReaders = new Pool<PageFileReader>();
poolWriters = new Pool<PageFileWriter>();
var inf = new FileInfo(fullPath);
// Создаем заголовок файла.
if (!inf.Exists)
{
//fullPath.CheckPath();
stream = CreateStream();
stream.SetLength(HeaderSize + Capacity * pageSize);
InitFile();
header[1] = pageSize;
}
else if (inf.Length < HeaderSize)
{
throw new Exception("File corrupt.");
}
else
{
stream = CreateStream();
InitFile();
if (header[1] != pageSize)
{
throw new Exception("Wrong page size.");
}
}
if (inf.IsReadOnly)
{
inf.IsReadOnly = false;
}
deleted = new UInt32Stack(fullPath + ".del");
}
public PageFileWriter(FileStream stream, int size, PageFileIOMode mode)
{
this.stream = stream;
this.size = size;
this.mode = mode;
if (mode == PageFileIOMode.Standart)
{
buf = new byte[8];
}
else
{
buf = new byte[12];
}
Crc32 = new CRC32();
}
