/// <summary>
/// 获得FAT类型;
/// </summary>
/// <param name="stream"></param>
/// <returns></returns>
private static FATPartType?GetFatType(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
var unManagedManager = UnMgdBasicDeviceManagerFactory.Create(stream);
if (unManagedManager == null)
{
return(null);
}
try {
if (unManagedManager.BasicDevicePtr == IntPtr.Zero)
{
return(null);
}
if (Partition_B_Fat(unManagedManager.BasicDevicePtr))
{
return(FATPartType.FAT32);
}
else if (Partition_B_Fat16(unManagedManager.BasicDevicePtr))
{
return(FATPartType.FAT16);
}
}
catch (Exception ex) {
LoggerService.WriteCallerLine(ex.Message);
}
return(null);
}
/// <summary>
/// 获取分区表类型;
/// </summary>
/// <param name="stream">流</param>
/// <returns></returns>
private static InnerPartsType?GetPartsType(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
InnerPartsType?pType = null;
IUnmanagedBasicDeviceManager unManagedManager = null;
try {
unManagedManager = UnMgdBasicDeviceManagerFactory.Create(stream);
}
catch (Exception ex) {
LoggerService.WriteCallerLine(ex.Message);
}
if (unManagedManager == null)
{
LoggerService.WriteCallerLine($"{nameof(unManagedManager)} can't be null.");
pType = null;
}
//判断是否是符合"签名";
try {
if (unManagedManager.BasicDevicePtr == IntPtr.Zero)
{
LoggerService.WriteCallerLine($"{nameof(unManagedManager.BasicDevicePtr)} can't be nullptr.");
}
else if (Partition_B_Dos(unManagedManager.BasicDevicePtr))
{
pType = InnerPartsType.DOS;
}
else if (Partition_B_Gpt(unManagedManager.BasicDevicePtr))
{
pType = InnerPartsType.GPT;
}
}
catch (Exception ex) {
LoggerService.WriteCallerLine(ex.Message);
}
unManagedManager?.Dispose();
return(pType);
}
public IFile ParseStream(Stream stream, string name, IProgressReporter reporter)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
var pType = GetPartsType(stream);
if (pType == null)
{
throw new InvalidOperationException($"The {nameof(stream)} is not a valid base device stream.");
}
IDevice device = null;
DeviceStoken deviceStoken = null;
var unEntity = UnMgdBasicDeviceManagerFactory.Create(stream);
//编辑Stoken;
void EditStoken()
{
if (deviceStoken == null)
{
throw new InvalidOperationException($"{nameof(deviceStoken)} can't be null.");
}
deviceStoken.BaseStream = stream;
deviceStoken.BlockSize = 512;
deviceStoken.Name = name;
deviceStoken.Size = stream.Length;
}
switch (pType.Value)
{
case InnerPartsType.DOS:
device = FileFactory.CreateDevice(Constants.DeviceKey_DOS);
deviceStoken = device.GetStoken(Constants.DeviceKey_DOS);
EditStoken();
EditStokenOnDos(deviceStoken, unEntity);
break;
case InnerPartsType.GPT:
device = FileFactory.CreateDevice(Constants.DeviceKey_GPT);
deviceStoken = device.GetStoken(Constants.DeviceKey_GPT);
EditStoken();
EditStokenOnGpt(deviceStoken, unEntity);
break;
default:
break;
}
if (device != null)
{
//加载分区;
device.FillParts(reporter);
device.Disposing += OnDeviceDisposing;
}
return(device);
}