/// <summary>
/// Creates a path that will no overwrite any files that already exist at
/// that location.
///
/// To ensure this, a zero-length file is created and its full path is returned.
/// </summary>
/// <param name="path">The path requested</param>
/// <returns>The path that contains the new zero-length file</returns>
public static string GetNonConflictingPath(string path)
{
string directory = Path.GetDirectoryName(path);
string fileName = Path.GetFileName(path);
return(TempFileManager.CreateNewFile(directory, fileName, false));
}
/*
* public int MaxChildPath(StringBuilder buffer)
* {
* buffer.Append(Path.DirectorySeparatorChar);
* buffer.Append(name);
*
* int startPos = buffer.Length;
* int currLen = 0;
* int depth = 0;
*
* StringBuilder maxChildPath = new StringBuilder();
* StringBuilder currChildPath = new StringBuilder();
* foreach (TransientFileSystemItem child in children)
* {
* int tmpDepth = child.MaxChildPath(currChildPath);
* if (currChildPath.Length > currLen && tmpDepth > depth)
* {
* if (currLen != 0)
* {
* buffer.Remove(startPos, currLen);
* }
* buffer.Append(currChildPath.ToString());
* currLen = currChildPath.Length;
* depth = tmpDepth;
* }
* else
* {
* currChildPath.Remove(0, currChildPath.Length);
* }
* Debug.Assert(currChildPath.Length == 0, "Programming error: currChildPath != 0");
* }
* if (maxChildPath.Length > 0)
* {
* buffer.Append(maxChildPath.ToString());
* }
*
* return ++depth;
* }
*/
public FileSystemInfo Create(DirectoryInfo destination)
{
// TODO use constant instead of literal 260
int charsLeft = 247 - destination.FullName.Length;
int maxElements = MaxElementsOfPathLongerThan(charsLeft);
if (charsLeft <= 0)
{
throw new PathTooLongException();
}
string truncatedName;
if (maxElements > 0)
{
int charsForMe;
if (maxElements > 1)
{
charsForMe = Math.Max(1, (int)Math.Floor(((double)(charsLeft - 6) / (maxElements - 1))));
}
else
{
charsForMe = Math.Max(1, (int)Math.Floor(((double)(charsLeft - 1) / maxElements)));
}
if (charsForMe >= name.Length)
{
truncatedName = name;
}
else
{
truncatedName = name.Substring(0, charsForMe);
}
}
else
{
truncatedName = name;
}
string fullPath = Path.Combine(destination.FullName, truncatedName);
Debug.WriteLine("TransientDirectory: Want to create " + fullPath);
string createdPath = TempFileManager.CreateNewFile(destination.FullName, truncatedName, true);
DirectoryInfo dirInfo = new DirectoryInfo(createdPath);
if (children != null)
{
foreach (TransientFileSystemItem item in children)
{
if (item != null)
{
item.Create(dirInfo);
}
}
}
return(dirInfo);
}
public FileSystemInfo Create(DirectoryInfo destination)
{
string truncatedName;
// TODO: use constant instead of literal 260
int charsLeft = 247 - destination.FullName.Length;
if (charsLeft < name.Length + 1)
{
truncatedName = Path.GetExtension(name);
if (truncatedName == null)
{
truncatedName = string.Empty;
}
int charsForName = charsLeft - truncatedName.Length /*extension*/ - 1 /*path seperator*/;
if (charsForName < 1)
{
throw new PathTooLongException();
}
truncatedName = Path.GetFileNameWithoutExtension(name).Substring(0, charsForName) + truncatedName;
}
else
{
truncatedName = name;
}
// create the file
Debug.WriteLine("TransientFile: Want to create " + Path.Combine(destination.FullName, truncatedName));
string newFile = TempFileManager.CreateNewFile(destination.FullName, truncatedName, false);
lock (this)
{
using (data)
{
using (FileStream fs = File.Create(newFile))
{
int b;
while ((b = data.ReadByte()) != -1)
{
fs.WriteByte((byte)b);
}
}
}
}
return(new FileInfo(newFile));
}
static TempFileManager()
{
string prefix = ProcessHelper.GetCurrentProcessName();
int lastDot = prefix.LastIndexOf('.');
if (lastDot > -1)
{
prefix = prefix.Substring(0, lastDot);
}
string currentDir = Environment.CurrentDirectory;
string suffix;
if (currentDir == null)
suffix = "";
else
suffix = currentDir.GetHashCode().ToString(CultureInfo.InvariantCulture);
singleton = new TempFileManager(Path.Combine(Path.GetTempPath(), prefix + suffix), true);
}
static TempFileManager()
{
string prefix = ProcessHelper.GetCurrentProcessName();
int lastDot = prefix.LastIndexOf('.');
if (lastDot > -1)
{
prefix = prefix.Substring(0, lastDot);
}
string currentDir = Environment.CurrentDirectory;
string suffix;
if (currentDir == null)
{
suffix = "";
}
else
{
suffix = currentDir.GetHashCode().ToString(CultureInfo.InvariantCulture);
}
singleton = new TempFileManager(Path.Combine(Path.GetTempPath(), prefix + suffix), true);
}