public FCB ReadFCB(int disknum, int item, string harddisk)
{
FileStream Disk = new FileStream(harddisk, FileMode.Open);
FCB buffer = new FCB();
Disk.Seek(64 * (disknum - 1) + 8 * (item - 1), SeekOrigin.Begin);
Disk.Read(buffer.Name, 0, 3);
buffer.Type = Convert.ToByte(Disk.ReadByte());
buffer.Attribute = Convert.ToByte(Disk.ReadByte());
buffer.Address = Convert.ToByte(Disk.ReadByte());
buffer.Length = Convert.ToChar(Disk.ReadByte());
Disk.Close();
return(buffer);
}
public void WriteFile(int disknumber, int Itemnumber, FCB buffer, string harddisk)
{
FileStream Disk = new FileStream(harddisk, FileMode.Open);
if (disknumber > 0 && Itemnumber > 0)
{
Disk.Seek(64 * (disknumber - 1) + 8 * (Itemnumber - 1), SeekOrigin.Begin);
Disk.Write(buffer.Name, 0, buffer.Name.Length);
Disk.Seek(0, SeekOrigin.Current);
Disk.WriteByte(buffer.Type);
Disk.Seek(0, SeekOrigin.Current);
Disk.WriteByte(buffer.Attribute);
Disk.Seek(0, SeekOrigin.Current);
Disk.WriteByte(buffer.Address);
Disk.Seek(0, SeekOrigin.Current);
Disk.WriteByte(Convert.ToByte(buffer.Length));
}
Disk.Close();
}
public void DeepCopyFile(string pathname1, string pathname2, string harddisk1, string harddisk2)
{
string[] pnames = pathname1.Split(new char[] { '\\', '.' });
string halfpathname = pathname1.Remove(pathname1.Length - 6);
char attribute = Convert.ToChar(pnames[pnames.Length - 1]);
UTF8Encoding utf = new UTF8Encoding();
byte[] name = utf.GetBytes(pnames[pnames.Length - 2]);
int disknum;
if (pnames.Length == 3) //c:\aaa.e
{
disknum = 3;
}
else
{
disknum = Search(halfpathname, harddisk1);
}
int item = FindItem(disknum, name, attribute, harddisk1)[0]; //获取文件在目录的第几项
FCB buffer = ReadFCB(disknum, item, harddisk1);
int [] dnums = FindDiskNumber(buffer.Address, harddisk1); //获取文件占用的所有盘块号
//读取文件的内容
FileStream Disk = new FileStream(harddisk1, FileMode.Open);
byte[] content = new byte[64 * dnums.Length];
for (int i = 0; i < dnums.Length; i++)
{
Disk.Seek(64 * (dnums[i] - 1), SeekOrigin.Begin);
Disk.Read(content, 64 * i, 64);
}
Disk.Close();
pathname2 = pathname2 + '\\' + pnames[pnames.Length - 2] + '.' + pnames[pnames.Length - 1];
DialogResult result = new DialogResult();
if (Search(pathname2, harddisk2) == 2)
{
result = MessageBox.Show("文件存在，是否覆盖？", "注意", MessageBoxButtons.OKCancel, MessageBoxIcon.Exclamation);
if (result == DialogResult.OK)
{
DeleteFile(pathname2, harddisk2);
int[] nums = SearchFAT(dnums.Length, harddisk2); //获取空盘块
RecordFileFAT(nums, harddisk2); //记录文件FAT
WriteContent(nums, content, harddisk2); //写入文件内容
CreateFile(pathname2, buffer.Attribute, Convert.ToByte(nums[0]), buffer.Length, harddisk2); //FCB写入新目录内
}
if (result == DialogResult.Cancel)
{
return;
}
}
else
{
int[] nums = SearchFAT(dnums.Length, harddisk2); //获取空盘块
RecordFileFAT(nums, harddisk2); //记录文件FAT
WriteContent(nums, content, harddisk2); //写入文件内容
CreateFile(pathname2, buffer.Attribute, Convert.ToByte(nums[0]), buffer.Length, harddisk2); //FCB写入新目录内
}
}
