namespace System.IO {
-#if NET_2_0
[ComVisible (true)]
public static class Path {
[Obsolete ("see GetInvalidPathChars and GetInvalidFileNameChars methods.")]
public static readonly char[] InvalidPathChars;
-#else
- public sealed class Path {
-
- private Path ()
- {
- }
-
- public static readonly char[] InvalidPathChars;
-#endif
public static readonly char AltDirectorySeparatorChar;
public static readonly char DirectorySeparatorChar;
public static readonly char PathSeparator;
internal static readonly string DirectorySeparatorStr;
public static readonly char VolumeSeparatorChar;
- private static readonly char[] PathSeparatorChars;
+ internal static readonly char[] PathSeparatorChars;
private static readonly bool dirEqualsVolume;
// class methods
return null;
if (path.IndexOfAny (InvalidPathChars) != -1)
- throw new ArgumentException ("Illegal characters in path", "path");
+ throw new ArgumentException ("Illegal characters in path.");
int iExt = findExtension (path);
if (extension == null)
return iExt < 0 ? path : path.Substring (0, iExt);
- else if (extension == String.Empty)
+ else if (extension.Length == 0)
return iExt < 0 ? path + '.' : path.Substring (0, iExt + 1);
else if (path.Length != 0) {
if (path2 == null)
throw new ArgumentNullException ("path2");
- if (path1 == String.Empty)
+ if (path1.Length == 0)
return path2;
- if (path2 == String.Empty)
+ if (path2.Length == 0)
return path1;
if (path1.IndexOfAny (InvalidPathChars) != -1)
- throw new ArgumentException ("Illegal characters in path", "path1");
+ throw new ArgumentException ("Illegal characters in path.");
if (path2.IndexOfAny (InvalidPathChars) != -1)
- throw new ArgumentException ("Illegal characters in path", "path2");
+ throw new ArgumentException ("Illegal characters in path.");
//TODO???: UNC names
- // LAMESPEC: MS says that if path1 is not empty and path2 is a full path
- // it should throw ArgumentException
if (IsPathRooted (path2))
return path2;
char p1end = path1 [path1.Length - 1];
if (p1end != DirectorySeparatorChar && p1end != AltDirectorySeparatorChar && p1end != VolumeSeparatorChar)
- return path1 + DirectorySeparatorChar + path2;
+ return path1 + DirectorySeparatorStr + path2;
return path1 + path2;
}
+
+ //
+ // This routine:
+ // * Removes duplicat path separators from a string
+ // * If the string starts with \\, preserves the first two (hostname on Windows)
+ // * Removes the trailing path separator.
+ // * Returns the DirectorySeparatorChar for the single input DirectorySeparatorChar or AltDirectorySeparatorChar
+ //
+ // Unlike CanonicalizePath, this does not do any path resolution
+ // (which GetDirectoryName is not supposed to do).
+ //
+ internal static string CleanPath (string s)
+ {
+ int l = s.Length;
+ int sub = 0;
+ int start = 0;
+
+ // Host prefix?
+ char s0 = s [0];
+ if (l > 2 && s0 == '\\' && s [1] == '\\'){
+ start = 2;
+ }
+
+ // We are only left with root
+ if (l == 1 && (s0 == DirectorySeparatorChar || s0 == AltDirectorySeparatorChar))
+ return s;
+
+ // Cleanup
+ for (int i = start; i < l; i++){
+ char c = s [i];
+
+ if (c != DirectorySeparatorChar && c != AltDirectorySeparatorChar)
+ continue;
+ if (i+1 == l)
+ sub++;
+ else {
+ c = s [i + 1];
+ if (c == DirectorySeparatorChar || c == AltDirectorySeparatorChar)
+ sub++;
+ }
+ }
+
+ if (sub == 0)
+ return s;
+
+ char [] copy = new char [l-sub];
+ if (start != 0){
+ copy [0] = '\\';
+ copy [1] = '\\';
+ }
+ for (int i = start, j = start; i < l && j < copy.Length; i++){
+ char c = s [i];
+
+ if (c != DirectorySeparatorChar && c != AltDirectorySeparatorChar){
+ copy [j++] = c;
+ continue;
+ }
+
+ // For non-trailing cases.
+ if (j+1 != copy.Length){
+ copy [j++] = DirectorySeparatorChar;
+ for (;i < l-1; i++){
+ c = s [i+1];
+ if (c != DirectorySeparatorChar && c != AltDirectorySeparatorChar)
+ break;
+ }
+ }
+ }
+ return new String (copy);
+ }
public static string GetDirectoryName (string path)
{
// LAMESPEC: For empty string MS docs say both
// return null AND throw exception. Seems .NET throws.
if (path == String.Empty)
- throw new ArgumentException();
+ throw new ArgumentException("Invalid path");
if (path == null || GetPathRoot (path) == path)
return null;
- CheckArgument.WhitespaceOnly (path);
- CheckArgument.PathChars (path);
+ if (path.Trim ().Length == 0)
+ throw new ArgumentException ("Argument string consists of whitespace characters only.");
+
+ if (path.IndexOfAny (System.IO.Path.InvalidPathChars) > -1)
+ throw new ArgumentException ("Path contains invalid characters");
int nLast = path.LastIndexOfAny (PathSeparatorChars);
if (nLast == 0)
if (nLast > 0) {
string ret = path.Substring (0, nLast);
int l = ret.Length;
- if (l >= 2 && ret [l - 1] == VolumeSeparatorChar)
+
+ if (l >= 2 && DirectorySeparatorChar == '\\' && ret [l - 1] == VolumeSeparatorChar)
return ret + DirectorySeparatorChar;
- else
- return ret;
+ else {
+ //
+ // Important: do not use CanonicalizePath here, use
+ // the custom CleanPath here, as this should not
+ // return absolute paths
+ //
+ return CleanPath (ret);
+ }
}
return String.Empty;
return null;
if (path.IndexOfAny (InvalidPathChars) != -1)
- throw new ArgumentException ("Illegal characters in path", "path");
+ throw new ArgumentException ("Illegal characters in path.");
int iExt = findExtension (path);
public static string GetFileName (string path)
{
- if (path == null || path == String.Empty)
+ if (path == null || path.Length == 0)
return path;
if (path.IndexOfAny (InvalidPathChars) != -1)
- throw new ArgumentException ("Illegal characters in path", "path");
+ throw new ArgumentException ("Illegal characters in path.");
int nLast = path.LastIndexOfAny (PathSeparatorChars);
if (nLast >= 0)
public static string GetFullPath (string path)
{
string fullpath = InsecureGetFullPath (path);
+#if !NET_2_1
if (SecurityManager.SecurityEnabled) {
new FileIOPermission (FileIOPermissionAccess.PathDiscovery, fullpath).Demand ();
}
+#endif
return fullpath;
}
if (path.Trim ().Length == 0) {
string msg = Locale.GetText ("The specified path is not of a legal form (empty).");
- throw new ArgumentException (msg, "path");
+ throw new ArgumentException (msg);
}
// adjust for drives, i.e. a special case for windows
if (path [0] != DirectorySeparatorChar)
path = path.Replace (AltDirectorySeparatorChar, DirectorySeparatorChar);
+
+ path = CanonicalizePath (path);
} else {
if (!IsPathRooted (path))
path = Directory.GetCurrentDirectory () + DirectorySeparatorStr + path;
if (path == null)
return null;
- if (path == String.Empty)
- throw new ArgumentException ("This specified path is invalid.");
+ if (path.Trim ().Length == 0)
+ throw new ArgumentException ("The specified path is not of a legal form.");
if (!IsPathRooted (path))
return String.Empty;
path = Path.Combine (GetTempPath(), "tmp" + num.ToString("x") + ".tmp");
try {
- f = new FileStream (path, FileMode.CreateNew);
+ f = new FileStream (path, FileMode.CreateNew, FileAccess.ReadWrite, FileShare.Read,
+ 8192, false, (FileOptions) 1);
}
catch (SecurityException) {
// avoid an endless loop
private static extern string get_temp_path ();
public static bool HasExtension (string path)
- {
- if (path == null || path.Trim () == String.Empty)
+ {
+ if (path == null || path.Trim ().Length == 0)
return false;
+ if (path.IndexOfAny (InvalidPathChars) != -1)
+ throw new ArgumentException ("Illegal characters in path.");
+
int pos = findExtension (path);
return 0 <= pos && pos < path.Length - 1;
}
return false;
if (path.IndexOfAny (InvalidPathChars) != -1)
- throw new ArgumentException ("Illegal characters in path", "path");
+ throw new ArgumentException ("Illegal characters in path.");
char c = path [0];
return (c == DirectorySeparatorChar ||
(!dirEqualsVolume && path.Length > 1 && path [1] == VolumeSeparatorChar));
}
-#if NET_2_0
public static char[] GetInvalidFileNameChars ()
{
// return a new array as we do not want anyone to be able to change the values
{
// return a new array as we do not want anyone to be able to change the values
if (Environment.IsRunningOnWindows) {
- return new char [36] { '\x00', '\x01', '\x02', '\x03', '\x04', '\x05', '\x06', '\x07',
+ return new char [36] { '\x22', '\x3C', '\x3E', '\x7C', '\x00', '\x01', '\x02', '\x03', '\x04', '\x05', '\x06', '\x07',
'\x08', '\x09', '\x0A', '\x0B', '\x0C', '\x0D', '\x0E', '\x0F', '\x10', '\x11', '\x12',
'\x13', '\x14', '\x15', '\x16', '\x17', '\x18', '\x19', '\x1A', '\x1B', '\x1C', '\x1D',
- '\x1E', '\x1F', '\x22', '\x3C', '\x3E', '\x7C' };
+ '\x1E', '\x1F' };
} else {
return new char [1] { '\x00' };
}
public static string GetRandomFileName ()
{
- char[] invalid = GetInvalidFileNameChars ();
// returns a 8.3 filename (total size 12)
StringBuilder sb = new StringBuilder (12);
// using strong crypto but without creating the file
RandomNumberGenerator rng = RandomNumberGenerator.Create ();
- byte[] buffer = new byte [16];
- while (sb.Length < 12) {
- int i = 0;
- rng.GetNonZeroBytes (buffer);
- while ((i < buffer.Length) && (sb.Length < 12)) {
- char c = (char) buffer [i];
- if (Array.IndexOf (invalid, c) == -1)
- sb.Append (c);
- i++;
- if (sb.Length == 8)
- sb.Append ('.');
- }
+ byte [] buffer = new byte [11];
+ rng.GetBytes (buffer);
+
+ for (int i = 0; i < buffer.Length; i++) {
+ if (sb.Length == 8)
+ sb.Append ('.');
+
+ // restrict to length of range [a..z0..9]
+ int b = (buffer [i] % 36);
+ char c = (char) (b < 26 ? (b + 'a') : (b - 26 + '0'));
+ sb.Append (c);
}
+
return sb.ToString ();
}
-#endif
+
// private class methods
private static int findExtension (string path)
AltDirectorySeparatorChar = MonoIO.AltDirectorySeparatorChar;
PathSeparator = MonoIO.PathSeparator;
-#if NET_2_0
// this copy will be modifiable ("by design")
InvalidPathChars = GetInvalidPathChars ();
-#else
- if (Environment.IsRunningOnWindows) {
- InvalidPathChars = new char [15] { '\x00', '\x08', '\x10', '\x11', '\x12', '\x14', '\x15', '\x16',
- '\x17', '\x18', '\x19', '\x22', '\x3C', '\x3E', '\x7C' };
- } else {
- InvalidPathChars = new char [1] { '\x00' };
- }
-#endif
// internal fields
DirectorySeparatorStr = DirectorySeparatorChar.ToString ();
dirEqualsVolume = (DirectorySeparatorChar == VolumeSeparatorChar);
}
-
+
+ // returns the server and share part of a UNC. Assumes "path" is a UNC.
+ static string GetServerAndShare (string path)
+ {
+ int len = 2;
+ while (len < path.Length && !IsDsc (path [len])) len++;
+
+ if (len < path.Length) {
+ len++;
+ while (len < path.Length && !IsDsc (path [len])) len++;
+ }
+
+ return path.Substring (2, len - 2).Replace (AltDirectorySeparatorChar, DirectorySeparatorChar);
+ }
+
+ // assumes Environment.IsRunningOnWindows == true
static bool SameRoot (string root, string path)
{
// compare root - if enough details are available
if ((root.Length < 2) || (path.Length < 2))
return false;
+
+ // UNC handling
+ if (IsDsc (root[0]) && IsDsc (root[1])) {
+ if (!(IsDsc (path[0]) && IsDsc (path[1])))
+ return false;
+
+ string rootShare = GetServerAndShare (root);
+ string pathShare = GetServerAndShare (path);
+
+ return String.Compare (rootShare, pathShare, true, CultureInfo.InvariantCulture) == 0;
+ }
+
// same volume/drive
if (!root [0].Equals (path [0]))
return false;
- // presence if the separator
+ // presence of the separator
if (path[1] != Path.VolumeSeparatorChar)
return false;
if ((root.Length > 2) && (path.Length > 2)) {
// STEP 2: Check to see if this is only a root
string root = Path.GetPathRoot (path);
// it will return '\' for path '\', while it should return 'c:\' or so.
- // Note: commenting this out makes the ened for the (target == 1...) check in step 5
+ // Note: commenting this out makes the need for the (target == 1...) check in step 5
//if (root == path) return path;
// STEP 3: split the directories, this gets rid of consecutative "/"'s
// STEP 4: Get rid of directories containing . and ..
int target = 0;
+ bool isUnc = Environment.IsRunningOnWindows &&
+ root.Length > 2 && IsDsc (root[0]) && IsDsc (root[1]);
+
+ // Set an overwrite limit for UNC paths since '\' + server + share
+ // must not be eliminated by the '..' elimination algorithm.
+ int limit = isUnc ? 3 : 0;
+
for (int i = 0; i < dirs.Length; i++) {
+ // WIN32 path components must be trimmed
+ if (Environment.IsRunningOnWindows)
+ dirs[i] = dirs[i].TrimEnd ();
+
if (dirs[i] == "." || (i != 0 && dirs[i].Length == 0))
continue;
else if (dirs[i] == "..") {
- if (target != 0)
+ // don't overwrite path segments below the limit
+ if (target > limit)
target--;
} else
dirs[target++] = dirs[i];
else {
string ret = String.Join (DirectorySeparatorStr, dirs, 0, target);
if (Environment.IsRunningOnWindows) {
+ // append leading '\' of the UNC path that was lost in STEP 3.
+ if (isUnc)
+ ret = Path.DirectorySeparatorStr + ret;
+
if (!SameRoot (root, ret))
ret = root + ret;
- // In GetFullPath(), it is assured that here never comes UNC. So this must only applied to such path that starts with '\', without drive specification.
- if (!IsDsc (path[0]) && SameRoot (root, path)) {
+
+ if (isUnc) {
+ return ret;
+ } else if (!IsDsc (path[0]) && SameRoot (root, path)) {
if (ret.Length <= 2 && !ret.EndsWith (DirectorySeparatorStr)) // '\' after "c:"
ret += Path.DirectorySeparatorChar;
return ret;
return ret;
}
}
+
+ // required for FileIOPermission (and most proibably reusable elsewhere too)
+ // both path MUST be "full paths"
+ static internal bool IsPathSubsetOf (string subset, string path)
+ {
+ if (subset.Length > path.Length)
+ return false;
+
+ // check that everything up to the last separator match
+ int slast = subset.LastIndexOfAny (PathSeparatorChars);
+ if (String.Compare (subset, 0, path, 0, slast) != 0)
+ return false;
+
+ slast++;
+ // then check if the last segment is identical
+ int plast = path.IndexOfAny (PathSeparatorChars, slast);
+ if (plast >= slast) {
+ return String.Compare (subset, slast, path, slast, path.Length - plast) == 0;
+ }
+ if (subset.Length != path.Length)
+ return false;
+
+ return String.Compare (subset, slast, path, slast, subset.Length - slast) == 0;
+ }
}
}
projects / mono.git / blobdiff