//--------------------文件，分割与合并---------------------------------------- using System.IO
/// <summary>
/// 单个文件分割函数,
/// 可将任意文件fileIn分割为若干个子文件， 单个子文件最大为 len KB
/// delet标识文件分割完成后是否删除原文件, change为加密密匙
/// fileIn = "D:\\file.rar", 子文件名形如"D:\\file.rar@_1.split"
/// </summary>
public void fileSplit(String fileIn, long KBlen, bool delet, string key)
{
//输入文件校验
if (fileIn == null || !System.IO.File.Exists(fileIn))
{
MessageBox.Show("文件" + fileIn + "不存在！");
return;
}
//从文件创建输入流
FileStream FileIn = new FileStream(fileIn, FileMode.Open);
byte[] data = new byte[KBlen < 1024 ? KBlen : 1024]; //流读取,缓存空间
long len = 0, I = 1; //记录子文件累积读取的KB大小, 分割的子文件序号
FileStream FileOut = null; //输出流
int readLen = 0; //每次实际读取的字节大小
while (readLen > 0 || (readLen = FileIn.Read(data, 0, data.Length)) > 0) //读取数据
{
//创建分割后的子文件，已有则覆盖，子文件"D:\\1.rar@_1.split"
if (len == 0)
{
FileOut = new FileStream(fileIn + "@_" + I++ + ".split", FileMode.Create);
}
len += readLen; //累计读取的文件大小
curLen += readLen; //当前处理进度
if (!key.Equals("【不加密】"))
{
Locker(ref data, key, true); // 数据加密
}
//输出，缓存数据写入子文件
FileOut.Write(data, 0, readLen);
FileOut.Flush();
//预读下一轮缓存数据
readLen = FileIn.Read(data, 0, data.Length);
if (len >= KBlen || readLen == 0) //子文件达到指定大小，或文件已读完
{
FileOut.Close(); //关闭当前输出流
len = 0;
}
//显示处理进度
if (Progress != null)
{
Progress.Value = (int)(curLen / FileLen * Progress.Maximum);
}
}
FileIn.Close(); //关闭输入流
if (delet)
{
System.IO.File.Delete(fileIn); //删除源文件
}
}
/// <summary>
/// CFF, Common File Format, files have a text header that includes the file extension followed by the data for that extension.
/// This function will break the CFF files into multiple files with the same name but the headers specified in the file. Each
/// file will contain the data listed under that extension header.
/// </summary>
/// <param name="FileName">Name of the CFF file to work from</param>
public static void BreakOutCFFFile(string FileName)
{
string Extension, FileNameBase, NewFileName, Line;
StreamReader FileIn;
StreamWriter FileOut = null;
Match rxResult;
Extension = GetFileExtension(FileName);
FileNameBase = FileName.Substring(0, FileName.Length - Extension.Length);
FileIn = new StreamReader(FileName);
Line = FileIn.ReadLine();
NewFileName = FileName + ".NEW";
while (Line != null)
{
rxResult = Regex.Match(Line, "^--- file type: ([A-Z]{3,3})( [A-Z]+)? ---$", RegexOptions.IgnoreCase);
if (rxResult.Success == true) //Begin a new file
{
Extension = rxResult.Groups[1].Value;
if (FileOut != null)
{
FileOut.Close();
}
FileOut = null;
NewFileName = FileNameBase + Extension;
}
else //possible data to put in a file
{
if ((FileOut != null) || (Line.Trim().CompareTo("") != 0)) //Non-blank lines won't be written if we haven't started a file
{
if (FileOut == null)
{
FileOut = new StreamWriter(NewFileName, false);
}
FileOut.WriteLine(Line);
}
}
Line = FileIn.ReadLine();
}
if (FileOut != null) //Make sure the file is closed
{
FileOut.Close();
}
FileIn.Close();
}
/// <summary>
/// 单个文件分割函数,
/// 可将任意文件fileIn分割为若干个子文件， 单个子文件最大为 len KB
/// delet标识文件分割完成后是否删除原文件, change为加密密匙
/// fileIn = "D:\\file.rar", 子文件名形如"D:\\file.rar@_1.split"
/// </summary>
public void fileSplit(String fileIn, int KBlen, bool delet, int change)
{
//输入文件校验
if (fileIn == null || !System.IO.File.Exists(fileIn))
{
MessageBox.Show("文件" + fileIn + "不存在！");
return;
}
//加密初始化
short sign = 1;
int num = 0, tmp;
if (change < 0)
{
sign = -1; change = -change;
}
//取文件名和后缀, fileIn = "D:\\1.rar"
//从文件创建输入流
FileStream FileIn = new FileStream(fileIn, FileMode.Open);
byte[] data = new byte[1024]; //流读取,缓存空间
int len = 0, I = 1; //记录子文件累积读取的KB大小, 分割的子文件序号
FileStream FileOut = null; //输出流
int readLen = 0; //每次实际读取的字节大小
while (readLen > 0 || (readLen = FileIn.Read(data, 0, data.Length)) > 0) //读取数据
{
//创建分割后的子文件，已有则覆盖，子文件"D:\\1.rar@_1.split"
if (len == 0)
{
String splitFileName = fileIn + "@_" + I++ + ".split";
outputLog("即将拆分文件" + splitFileName);
FileOut = new FileStream(splitFileName, FileMode.Create);
}
//加密逻辑,对data的首字节进行逻辑偏移加密
if (num == 0)
{
num = change;
}
tmp = data[0] + sign * (num % 3 + 3);
if (tmp > 255)
{
tmp -= 255;
}
else if (tmp < 0)
{
tmp += 255;
}
data[0] = (byte)tmp;
num /= 3;
//输出，缓存数据写入子文件
FileOut.Write(data, 0, readLen);
FileOut.Flush();
//预读下一轮缓存数据
readLen = FileIn.Read(data, 0, data.Length);
if (++len >= KBlen || readLen == 0) //子文件达到指定大小，或文件已读完
{
FileOut.Close(); //关闭当前输出流
len = 0;
}
}
FileIn.Close(); //关闭输入流
if (delet)
{
System.IO.File.Delete(fileIn); //删除源文件
}
}