// 获取数据信息
private Types.VirtualDataInfo GetDataInfo(long pos)
{
Types.VirtualDataInfo res = new Types.VirtualDataInfo();
res.Position = pos;
using (dpz3.File.BinaryFile file = new File.BinaryFile(workPath, System.IO.FileMode.OpenOrCreate)) {
file.Position = pos * Data_Info_Size;
// 读取Sign
try {
// 读取NextPosition
res.NextPosition = file.Read();
res.NextPosition += file.Read() * 256;
res.NextPosition += file.Read() * 256 * 256;
res.NextPosition += file.Read() * 256 * 256 * 256;
// 读取FirstChildPosition
res.Length = file.Read();
res.Length += file.Read() * 256;
} catch (Exception ex) {
throw new Exception("磁盘数据损坏", ex);
}
}
return(res);
}
// 获取数据信息
private void ReadData(ref Types.VirtualDataInfo info)
{
using (dpz3.File.BinaryFile file = new File.BinaryFile(workPath, System.IO.FileMode.OpenOrCreate)) {
file.Position = info.Position * Data_Info_Size + 6;
// 读取Sign
try {
// 读取Data
info.Data = file.Read(info.Length);
} catch (Exception ex) {
throw new Exception("磁盘数据损坏", ex);
}
}
}
// 保存磁盘信息
private void SaveDiskInfo()
{
using (dpz3.File.BinaryFile file = new File.BinaryFile(workPath, System.IO.FileMode.OpenOrCreate)) {
file.Position = 0;
// 输出Sign
file.Write(diskInfo.Sign);
// 输出Version
file.Write(GetBytesFromInt(diskInfo.Version));
// 输出DataBlocks
file.Write(GetBytesFromLong(diskInfo.DataBlocks));
}
}
// 保存数据信息
private void SaveDataInfo(Types.VirtualDataInfo info)
{
using (dpz3.File.BinaryFile file = new File.BinaryFile(workPath, System.IO.FileMode.OpenOrCreate)) {
file.Position = info.Position * Data_Info_Size;
// 读取Sign
try {
// 输出NextPosition
file.Write(GetBytesFromLong(info.NextPosition));
// 输出Length
file.Write(GetBytesFromInt(info.Length));
} catch (Exception ex) {
throw new Exception("磁盘数据损坏", ex);
}
}
}
// 保存路径信息
private void SavePathInfo(Types.VirtualPathInfo info)
{
using (dpz3.File.BinaryFile file = new File.BinaryFile(workPath, System.IO.FileMode.OpenOrCreate)) {
file.Position = info.Position * Data_Info_Size;
// 输出NextPosition
file.Write(GetBytesFromLong(info.NextPosition));
// 输出FirstChildPosition
file.Write(GetBytesFromLong(info.FirstChildPosition));
// 读取Type
file.Write(new byte[] { info.Type });
// 读取Name
file.Write(info.Name);
}
}
// 加载磁盘信息
private void LoadDiskInfo()
{
diskInfo = new Types.VirtualDiskInfo();
diskInfo.Sign = new byte[4];
// 判断文件是否存在，不存在则创建
if (System.IO.File.Exists(workPath))
{
using (dpz3.File.BinaryFile file = new File.BinaryFile(workPath, System.IO.FileMode.Open)) {
file.Position = 0;
// 读取Sign
if (!file.IsEnd)
{
diskInfo.Sign[0] = file.Read();
}
if (!file.IsEnd)
{
diskInfo.Sign[1] = file.Read();
}
if (!file.IsEnd)
{
diskInfo.Sign[2] = file.Read();
}
if (!file.IsEnd)
{
diskInfo.Sign[3] = file.Read();
}
if (System.Text.Encoding.ASCII.GetString(diskInfo.Sign) != "dvdk")
{
throw new Exception("磁盘数据损坏");
}
// 读取Version
if (!file.IsEnd)
{
diskInfo.Version = file.Read();
}
if (!file.IsEnd)
{
diskInfo.Version += file.Read() * 256;
}
// 读取DataBlocks
if (!file.IsEnd)
{
diskInfo.DataBlocks = file.Read();
}
if (!file.IsEnd)
{
diskInfo.DataBlocks += file.Read() * 256;
}
if (!file.IsEnd)
{
diskInfo.DataBlocks += file.Read() * 256 * 256;
}
if (!file.IsEnd)
{
diskInfo.DataBlocks += file.Read() * 256 * 256 * 256;
}
}
}
else
{
diskInfo.Sign[0] = (byte)'d';
diskInfo.Sign[1] = (byte)'v';
diskInfo.Sign[2] = (byte)'d';
diskInfo.Sign[3] = (byte)'k';
diskInfo.Version = 1;
diskInfo.DataBlocks = 0;
// 保存信息
SaveDiskInfo();
}
}
