/// <summary>
/// 解压所有条目，顺序解压
/// </summary>
/// <param name="SaveDir">存储目录</param>
public void UnZipAll(string SaveDir)
{
try
{
//条目表
byte[] EntryTablesBuffer = new byte[EntrysTableLen];
Array.Copy(this.buff, HeadLen, EntryTablesBuffer, 0, EntrysTableLen);
//文件数据
byte[] FilesBuffer = new byte[Length - EntrysTableLen - HeadLen];
Array.Copy(this.buff, HeadLen + EntrysTableLen, FilesBuffer, 0, Length - EntrysTableLen - HeadLen);
//开始遍历Entry
int iTablesOffBits = 0;
int iFilesOffBits = 0;
uint iCount = 1;
while (iCount <= EntryCount)
{
uint EntryLen = BitConverter.ToUInt32(EntryTablesBuffer, iTablesOffBits);
uint FileLen = BitConverter.ToUInt32(EntryTablesBuffer, iTablesOffBits + sizeof(uint) * 2 + sizeof(UInt16) * 2);
byte[] temp = new byte[EntryLen - FileLen];
Array.Copy(EntryTablesBuffer, iTablesOffBits, temp, 0, EntryLen - FileLen);
Entry _entry = new Entry(temp);
byte[] EntryFileBuffer = new byte[_entry.FileLen];
Array.Copy(FilesBuffer, iFilesOffBits, EntryFileBuffer, 0, _entry.FileLen);
string FileName = Path.Combine(SaveDir, BitConvertHelper.Byte2String(_entry.EntryDir, 0, _entry.EntryDirLen));
if (!Directory.Exists(FileName))
{
Directory.CreateDirectory(FileName);
}
FileName = Path.Combine(FileName, BitConvertHelper.Byte2String(_entry.EntryName, 0, _entry.EntryNameLen));
FileStream fsSave = new FileStream(FileName, FileMode.Create);
Lz77Compression lz77 = new Lz77Compression();
byte[] btyFile = lz77.DeCompress(EntryFileBuffer);
fsSave.Write(btyFile, 0, btyFile.Length);
//fsSave.Write(EntryFileBuffer, 0, EntryFileBuffer.Length);
fsSave.Close();
iTablesOffBits += (int)(EntryLen - FileLen);
iFilesOffBits += (int)_entry.FileLen;
iCount++;
}
}
catch (Exception ex)
{
throw new Exception("解压缩文件错误！", ex);
}
}
/// <summary>
/// 通过指定文件构造一个条目
/// </summary>
/// <param name="FileName">需要压缩的文件</param>
/// <param name="ZipInnerDir">压缩包里的路径</param>
public Entry(string FileName, string ZipInnerDir)
{
System.IO.FileStream fs = null;
try
{
fs = new FileStream(FileName, FileMode.Open, FileAccess.Read);
}
catch (FileNotFoundException exFnf)
{
if (fs != null)
{
fs.Close();
}
throw exFnf;
}
byte[] file = new byte[(int)fs.Length];
fs.Read(file, 0, (int)fs.Length);
fs.Close();
this.filebuff = new Lz77Compression().Compress(file);
FileLen = (uint)filebuff.Length;
Length += FileLen;
string sFileName = Path.GetFileName(FileName);
EntryName = BitConvertHelper.String2Byte(sFileName);
EntryNameLen = (ushort)EntryName.Length;
Length += EntryNameLen;
EntryDir = BitConvertHelper.String2Byte(ZipInnerDir);
EntryDirLen = (ushort)EntryDir.Length;
Length += EntryDirLen;
//Buff处理，不包括文件
byte[] temp = new byte[Length - FileLen];
BitConverter.GetBytes(Length).CopyTo(temp, 0);
BitConverter.GetBytes(EntryNameLen).CopyTo(temp, 4);
BitConverter.GetBytes(EntryDirLen).CopyTo(temp, 6);
BitConverter.GetBytes(offset).CopyTo(temp, 8);
BitConverter.GetBytes(FileLen).CopyTo(temp, 12);
EntryName.CopyTo(temp, 16);
EntryDir.CopyTo(temp, 16 + EntryName.Length);
buff = temp;
}
