Code:
/ FXUpdate3074 / FXUpdate3074 / 1.1 / untmp / whidbey / QFE / ndp / clr / src / BCL / System / IO / Path.cs / 4 / Path.cs
// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
/*============================================================
**
** Class: Path
**
**
** Purpose: A collection of path manipulation methods.
**
**
===========================================================*/
using System;
using System.Security.Permissions;
using Win32Native = Microsoft.Win32.Win32Native;
using System.Text;
using System.Runtime.InteropServices;
using System.Security;
using System.Security.Cryptography;
using System.Runtime.CompilerServices;
using System.Globalization;
using System.Runtime.Versioning;
namespace System.IO {
// Provides methods for processing directory strings in an ideally
// cross-platform manner. Most of the methods don't do a complete
// full parsing (such as examining a UNC hostname), but they will
// handle most string operations.
//
// File names cannot contain backslash (\), slash (/), colon (:),
// asterick (*), question mark (?), quote ("), less than (<;),
// greater than (>;), or pipe (|). The first three are used as directory
// separators on various platforms. Asterick and question mark are treated
// as wild cards. Less than, Greater than, and pipe all redirect input
// or output from a program to a file or some combination thereof. Quotes
// are special.
//
// We are guaranteeing that Path.SeparatorChar is the correct
// directory separator on all platforms, and we will support
// Path.AltSeparatorChar as well. To write cross platform
// code with minimal pain, you can use slash (/) as a directory separator in
// your strings.
// Class contains only static data, no need to serialize
[ComVisible(true)]
public static class Path
{
// Platform specific directory separator character. This is backslash
// ('\') on Windows, slash ('/') on Unix, and colon (':') on Mac.
//
#if !PLATFORM_UNIX
public static readonly char DirectorySeparatorChar = '\\';
#else
public static readonly char DirectorySeparatorChar = '/';
#endif // !PLATFORM_UNIX
// Platform specific alternate directory separator character.
// This is backslash ('\') on Unix, and slash ('/') on Windows
// and MacOS.
//
#if !PLATFORM_UNIX
public static readonly char AltDirectorySeparatorChar = '/';
#else
public static readonly char AltDirectorySeparatorChar = '\\';
#endif // !PLATFORM_UNIX
// Platform specific volume separator character. This is colon (':')
// on Windows and MacOS, and slash ('/') on Unix. This is mostly
// useful for parsing paths like "c:\windows" or "MacVolume:System Folder".
//
#if !PLATFORM_UNIX
public static readonly char VolumeSeparatorChar = ':';
#else
public static readonly char VolumeSeparatorChar = '/';
#endif // !PLATFORM_UNIX
// Platform specific invalid list of characters in a path.
// See the "Naming a File" MSDN conceptual docs for more details on
// what is valid in a file name (which is slightly different from what
// is legal in a path name).
// Note: This list is duplicated in CheckInvalidPathChars
[Obsolete("Please use GetInvalidPathChars or GetInvalidFileNameChars instead.")]
public static readonly char[] InvalidPathChars = { '\"', '<', '>', '|', '\0', (Char)1, (Char)2, (Char)3, (Char)4, (Char)5, (Char)6, (Char)7, (Char)8, (Char)9, (Char)10, (Char)11, (Char)12, (Char)13, (Char)14, (Char)15, (Char)16, (Char)17, (Char)18, (Char)19, (Char)20, (Char)21, (Char)22, (Char)23, (Char)24, (Char)25, (Char)26, (Char)27, (Char)28, (Char)29, (Char)30, (Char)31 };
private static readonly char[] RealInvalidPathChars = { '\"', '<', '>', '|', '\0', (Char)1, (Char)2, (Char)3, (Char)4, (Char)5, (Char)6, (Char)7, (Char)8, (Char)9, (Char)10, (Char)11, (Char)12, (Char)13, (Char)14, (Char)15, (Char)16, (Char)17, (Char)18, (Char)19, (Char)20, (Char)21, (Char)22, (Char)23, (Char)24, (Char)25, (Char)26, (Char)27, (Char)28, (Char)29, (Char)30, (Char)31 };
private static readonly char[] InvalidFileNameChars = { '\"', '<', '>', '|', '\0', (Char)1, (Char)2, (Char)3, (Char)4, (Char)5, (Char)6, (Char)7, (Char)8, (Char)9, (Char)10, (Char)11, (Char)12, (Char)13, (Char)14, (Char)15, (Char)16, (Char)17, (Char)18, (Char)19, (Char)20, (Char)21, (Char)22, (Char)23, (Char)24, (Char)25, (Char)26, (Char)27, (Char)28, (Char)29, (Char)30, (Char)31, ':', '*', '?', '\\', '/' };
#if !PLATFORM_UNIX
public static readonly char PathSeparator = ';';
#else
public static readonly char PathSeparator = ':';
#endif // !PLATFORM_UNIX
// Make this public sometime.
// MaxPath accounts for the null-terminating character, for example, the maximum path on the D drive is "D:\<256 chars>\0".
internal static readonly int MaxPath = 260;
// Changes the extension of a file path. The path parameter
// specifies a file path, and the extension parameter
// specifies a file extension (with a leading period, such as
// ".exe" or ".cs").
//
// The function returns a file path with the same root, directory, and base
// name parts as path, but with the file extension changed to
// the specified extension. If path is null, the function
// returns null. If path does not contain a file extension,
// the new file extension is appended to the path. If extension
// is null, any exsiting extension is removed from path.
//
public static String ChangeExtension(String path, String extension) {
if (path != null) {
CheckInvalidPathChars(path);
String s = path;
for (int i = path.Length; --i >= 0;) {
char ch = path[i];
if (ch == '.') {
s = path.Substring(0, i);
break;
}
if (ch == DirectorySeparatorChar || ch == AltDirectorySeparatorChar || ch == VolumeSeparatorChar) break;
}
if (extension != null && path.Length != 0) {
if (extension.Length == 0 || extension[0] != '.') {
s = s + ".";
}
s = s + extension;
}
return s;
}
return null;
}
// Returns the directory path of a file path. This method effectively
// removes the last element of the given file path, i.e. it returns a
// string consisting of all characters up to but not including the last
// backslash ("\") in the file path. The returned value is null if the file
// path is null or if the file path denotes a root (such as "\", "C:", or
// "\\server\share").
//
public static String GetDirectoryName(String path) {
if (path != null) {
CheckInvalidPathChars(path);
path = FixupPath(path);
int root = GetRootLength(path);
int i = path.Length;
if (i > root) {
i = path.Length;
if (i == root) return null;
while (i > root && path[--i] != DirectorySeparatorChar && path[i] != AltDirectorySeparatorChar);
return path.Substring(0, i);
}
}
return null;
}
// Gets the length of the root DirectoryInfo or whatever DirectoryInfo markers
// are specified for the first part of the DirectoryInfo name.
//
internal static int GetRootLength(String path) {
CheckInvalidPathChars(path);
int i = 0;
int length = path.Length;
#if !PLATFORM_UNIX
if (length >= 1 && (IsDirectorySeparator(path[0]))) {
// handles UNC names and directories off current drive's root.
i = 1;
if (length >= 2 && (IsDirectorySeparator(path[1]))) {
i = 2;
int n = 2;
while (i < length && ((path[i] != DirectorySeparatorChar && path[i] != AltDirectorySeparatorChar) || --n > 0)) i++;
}
}
else if (length >= 2 && path[1] == VolumeSeparatorChar) {
// handles A:\foo.
i = 2;
if (length >= 3 && (IsDirectorySeparator(path[2]))) i++;
}
return i;
#else
if (length >= 1 && (IsDirectorySeparator(path[0]))) {
i = 1;
}
return i;
#endif // !PLATFORM_UNIX
}
internal static bool IsDirectorySeparator(char c) {
return (c==DirectorySeparatorChar || c == AltDirectorySeparatorChar);
}
public static char[] GetInvalidPathChars()
{
return (char[]) RealInvalidPathChars.Clone();
}
public static char[] GetInvalidFileNameChars()
{
return (char[]) InvalidFileNameChars.Clone();
}
// Returns the extension of the given path. The returned value includes the
// period (".") character of the extension except when you have a terminal period when you get String.Empty, such as ".exe" or
// ".cpp". The returned value is null if the given path is
// null or if the given path does not include an extension.
//
public static String GetExtension(String path) {
if (path==null)
return null;
CheckInvalidPathChars(path);
int length = path.Length;
for (int i = length; --i >= 0;) {
char ch = path[i];
if (ch == '.')
{
if (i != length - 1)
return path.Substring(i, length - i);
else
return String.Empty;
}
if (ch == DirectorySeparatorChar || ch == AltDirectorySeparatorChar || ch == VolumeSeparatorChar)
break;
}
return String.Empty;
}
// Expands the given path to a fully qualified path. The resulting string
// consists of a drive letter, a colon, and a root relative path. This
// function does not verify that the resulting path
// refers to an existing file or directory on the associated volume.
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static String GetFullPath(String path) {
String fullPath = GetFullPathInternal(path);
new FileIOPermission( FileIOPermissionAccess.PathDiscovery, new String[] { fullPath }, false, false ).Demand();
return fullPath;
}
// This method is package access to let us quickly get a string name
// while avoiding a security
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
internal static String GetFullPathInternal(String path) {
if (path == null)
throw new ArgumentNullException("path");
String newPath = NormalizePath(path, true);
return newPath;
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
internal static String NormalizePath(String path, bool fullCheck) {
#if !FEATURE_PAL
// P/Invoke doesn't support char* marshalling on Win9x.
// So use the slower code path on 9x and faster stackalloc based
// implementation in NT. This is not an ideal situation, the code
// is duplicated in 2 places, so some amount of maintenance involved
// but this is only a temp solution until we get rid off 9x support.
//
if (Environment.nativeIsWin9x()) {
return NormalizePathSlow(path, fullCheck);
}
#endif
return NormalizePathFast(path, fullCheck);
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
internal static String NormalizePathSlow(String path, bool fullCheck) {
BCLDebug.Assert(path != null, "path can't be null");
// If we're doing a full path
if (fullCheck) {
// Trim whitespace off the end of the string.
path = path.TrimEnd();
// Look for illegal path characters.
CheckInvalidPathChars(path);
}
int index = 0;
char[] newBuffer = new char[MaxPath];
int newBufferIndex = 0;
char[] finalBuffer = null;
uint numSpaces = 0;
uint numDots = 0;
bool fixupDirectorySeparator = false;
// Number of significant chars other than potentially suppressible
// dots and spaces since the last directory or volume separator char
uint numSigChars = 0;
int lastSigChar = -1; // Index of last significant character.
// Whether this segment of the path (not the complete path) started
// with a volume separator char. Reject "c:...".
bool startedWithVolumeSeparator = false;
bool firstSegment = true;
bool mightBeShortFileName = false;
#if !PLATFORM_UNIX
// Win9x fixup - //server/share becomes c://server/share.
// This prevents our code from turning "\\server" into "\server".
// On Win9x, //server/share becomes c://server/share
if (path.Length > 0 && (path[0] == DirectorySeparatorChar || path[0] == AltDirectorySeparatorChar)) {
newBuffer[newBufferIndex++] = '\\';
index++;
lastSigChar = 0;
}
#endif
// Normalize the string, stripping out redundant dots, spaces, and
// slashes.
while (index < path.Length) {
char currentChar = path[index];
// We handle both directory separators and dots specially. For
// directory separators, we consume consecutive appearances.
// For dots, we consume all dots beyond the second in
// succession. All other characters are added as is. In
// addition we consume all spaces after the last other char
// in a directory name up until the directory separator.
if (currentChar == DirectorySeparatorChar || currentChar == AltDirectorySeparatorChar) {
// If we have a path like "123.../foo", remove the trailing dots.
// However, if we found "c:\temp\..\bar" or "c:\temp\...\bar", don't.
// Also remove trailing spaces from both files & directory names.
// This was agreed on with the OS team to fix undeletable directory
// names ending in spaces.
// If we saw a '\' as the previous last significant character and
// are simply going to write out dots, suppress them.
// If we only contain dots and slashes though, only allow
// a string like [dot]+ [space]*. Ignore everything else.
// Legal: "\.. \", "\...\", "\. \"
// Illegal: "\.. .\", "\. .\", "\ .\"
if (numSigChars == 0) {
// Dot and space handling
if (numDots > 0) {
// Look for ".[space]*" or "..[space]*"
int start = lastSigChar + 1;
if (path[start] != '.')
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
// Only allow "[dot]+[space]*", and normalize the
// legal ones to "." or ".."
if (numDots >= 2) {
// Reject "C:..."
if (startedWithVolumeSeparator && numDots > 2)
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
if (path[start + 1] == '.') {
// Search for a space in the middle of the
// dots and throw
for(int i=start + 2; i < start + numDots; i++) {
if (path[i] != '.')
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
}
numDots = 2;
}
else {
if (numDots > 1)
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
numDots = 1;
}
}
if (newBufferIndex + numDots + 1 >= MaxPath)
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
if (numDots == 2) {
newBuffer[newBufferIndex++] = '.';
}
newBuffer[newBufferIndex++] = '.';
fixupDirectorySeparator = false;
// Continue in this case, potentially writing out '\'.
}
if (numSpaces > 0 && firstSegment) {
// Handle strings like " \\server\share".
if (index + 1 < path.Length &&
(path[index + 1] == DirectorySeparatorChar || path[index + 1] == AltDirectorySeparatorChar))
{
newBuffer[newBufferIndex++] = DirectorySeparatorChar;
}
}
}
numDots = 0;
numSpaces = 0; // Suppress trailing spaces
if (!fixupDirectorySeparator) {
fixupDirectorySeparator = true;
if (newBufferIndex + 1 >= MaxPath)
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
newBuffer[newBufferIndex++] = DirectorySeparatorChar;
}
numSigChars = 0;
lastSigChar = index;
startedWithVolumeSeparator = false;
firstSegment = false;
#if !PLATFORM_UNIX
// For short file names, we must try to expand each of them as
// soon as possible. We need to allow users to specify a file
// name that doesn't exist using a path with short file names
// in it, such as this for a temp file we're trying to create:
// C:\DO----E~1\USERNA~1.RED\LOCALS~1\Temp\bg3ylpzp
// We could try doing this afterwards piece by piece, but it's
// probably a lot simpler to do it here.
if (mightBeShortFileName) {
newBuffer[newBufferIndex] = '\0';
TryExpandShortFileName(newBuffer, ref newBufferIndex, MAX_PATH);
mightBeShortFileName = false;
}
#endif
} // if (Found directory separator)
else if (currentChar == '.') {
// Reduce only multiple .'s only after slash to 2 dots. For
// instance a...b is a valid file name.
numDots++;
// Don't flush out non-terminal spaces here, because they may in
// the end not be significant. Turn "c:\ . .\foo" -> "c:\foo"
// which is the conclusion of removing trailing dots & spaces,
// as well as folding multiple '\' characters.
}
else if (currentChar == ' ') {
numSpaces++;
}
else { // Normal character logic
#if !PLATFORM_UNIX
if (currentChar == '~')
mightBeShortFileName = true;
#endif
fixupDirectorySeparator = false;
#if !PLATFORM_UNIX
// To reject strings like "C:...\foo" and "C :\foo"
if (firstSegment && currentChar == VolumeSeparatorChar) {
// Only accept "C:", not "c :" or ":"
// Get a drive letter or ' ' if index is 0.
char driveLetter = (index > 0) ? path[index-1] : ' ';
bool validPath = ((numDots == 0) && (numSigChars >= 1) && (driveLetter != ' '));
if (!validPath)
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
startedWithVolumeSeparator = true;
// We need special logic to make " c:" work, we should not fix paths like " foo::$DATA"
if (numSigChars > 1) { // Common case, simply do nothing
uint spaceCount = 0; // How many spaces did we write out, numSpaces has already been reset.
while((spaceCount < newBufferIndex) && newBuffer[spaceCount] == ' ')
spaceCount++;
if (numSigChars - spaceCount == 1) {
newBuffer[0] = driveLetter; // Overwrite spaces, we need a special case to not break " foo" as a relative path.
newBufferIndex=1;
}
}
numSigChars = 0;
}
else
#endif // !PLATFORM_UNIX
{
numSigChars += 1 + numDots + numSpaces;
}
// Copy any spaces & dots since the last significant character
// to here. Note we only counted the number of dots & spaces,
// and don't know what order they're in. Hence the copy.
if (numDots > 0 || numSpaces > 0) {
int numCharsToCopy = (lastSigChar >= 0) ? index - lastSigChar - 1 : index;
if (numCharsToCopy > 0) {
path.CopyTo(lastSigChar + 1, newBuffer, newBufferIndex, numCharsToCopy);
newBufferIndex += numCharsToCopy;
}
numDots = 0;
numSpaces = 0;
}
if (newBufferIndex + 1 >= MaxPath)
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
newBuffer[newBufferIndex++] = currentChar;
lastSigChar = index;
}
index++;
} // end while
// Drop any trailing dots and spaces from file & directory names, EXCEPT
// we MUST make sure that "C:\foo\.." is correctly handled.
// Also handle "C:\foo\." -> "C:\foo", while "C:\." -> "C:\"
if (numSigChars == 0) {
if (numDots > 0) {
// Look for ".[space]*" or "..[space]*"
int start = lastSigChar + 1;
if (path[start] != '.')
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
// Only allow "[dot]+[space]*", and normalize the
// legal ones to "." or ".."
if (numDots >= 2) {
// Reject "C:..."
if (startedWithVolumeSeparator && numDots > 2)
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
if (path[start + 1] == '.') {
// Search for a space in the middle of the
// dots and throw
for(int i=start + 2; i < start + numDots; i++) {
if (path[i] != '.')
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
}
numDots = 2;
}
else {
if (numDots > 1)
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
numDots = 1;
}
}
if (newBufferIndex + numDots >= MaxPath)
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
if (numDots == 2) {
newBuffer[newBufferIndex++] = '.';
}
newBuffer[newBufferIndex++] = '.';
}
} // if (numSigChars == 0)
// If we ended up eating all the characters, bail out.
if (newBufferIndex == 0)
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
BCLDebug.Assert(newBufferIndex <= MaxPath, "Overflowed temporary path buffer" );
newBuffer[newBufferIndex] = '\0';
// Disallow URL's here. Some of our other Win32 API calls will reject
// them later, so we might be better off rejecting them here.
// Note we've probably turned them into "file:\D:\foo.tmp" by now.
// But for compatibility, ensure that callers that aren't doing a
// full
if (fullCheck &&
(CharArrayStartsWithOrdinal(newBuffer, newBufferIndex, "http:", false) ||
CharArrayStartsWithOrdinal(newBuffer, newBufferIndex, "file:", false)))
throw new ArgumentException(Environment.GetResourceString("Argument_PathUriFormatNotSupported"));
#if !PLATFORM_UNIX
// If the last part of the path (file or directory name) had a tilde,
// expand that too.
if (mightBeShortFileName) {
TryExpandShortFileName(newBuffer, ref newBufferIndex, MaxPath);
}
#endif
// Call the Win32 API to do the final canonicalization step.
int result = 1;
char[] pFinal;
int len;
if (fullCheck) {
// Win32 GetFullPathName requires the input buffer to be big enough to fit the initial
// path which is a concat of CWD and the relative path, this can be of an arbitrary
// size (and > MAX_PATH which becomes an artificial limit at this point),
// even though the final normalized path after fixing up the relative path syntax
// might be well within the MAX_PATH restriction. For ex,
// "c:\SomeReallyLongDirName(thinkGreaterThan_MAXPATH)\..\foo.txt" which actually requires a
// buffer well with in the MAX_PATH as the normalized path is just "c:\foo.txt"
// This buffer requirement seems wrong, it could be a
// Ideally we would get the required buffer length first by calling GetFullPathName
// once without the buffer and use that in the later call but this doesn't always work
// due to Win32 GetFullPathName
finalBuffer = new char[MaxPath + 1];
result = Win32Native.GetFullPathName(newBuffer, MaxPath + 1, finalBuffer, IntPtr.Zero);
// If success, the return buffer length does not account for the terminating null character.
// If failure, the return buffer length does account for the path + the terminating null character.
if (result > MaxPath) {
finalBuffer = new char[result];
result = Win32Native.GetFullPathName(newBuffer, result, finalBuffer, IntPtr.Zero);
// Fullpath is genuinely long
if (result > MaxPath)
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
}
BCLDebug.Assert(result <= MaxPath, "did we accidently remove a PathTooLongException check?");
if (result == 0 && newBuffer[0] != '\0') {
__Error.WinIOError();
}
else if (result < MaxPath) // May be necessary for empty strings
finalBuffer[result] = '\0';
#if !FEATURE_PAL
// GetFullPathName on Win9x returns the length in TCHARS
if (Environment.nativeIsWin9x()) {
for (int i=0; i= 0) {
BCLDebug.Assert(lastSlash < len, "path unexpectedly ended in a '\'");
char[] savedName = new char[len - lastSlash - 1];
Array.Copy(finalBuffer, lastSlash + 1, savedName, 0, len - lastSlash - 1);
finalBuffer[lastSlash] = '\0';
r = TryExpandShortFileName(finalBuffer, ref lastSlash, MaxPath);
// Clean up changes made to the finalBuffer.
finalBuffer[lastSlash] = DirectorySeparatorChar;
Array.Copy(savedName, 0, finalBuffer, lastSlash + 1, savedName.Length);
if (r)
len = lastSlash + 1 + savedName.Length;
}
}
}
#endif
}
else {
pFinal = newBuffer;
len = newBufferIndex;
}
if (result != 0) {
/* Throw an ArgumentException for paths like \\, \\server, \\server\
This
*/
if (pFinal[0] == '\\' && pFinal[1] == '\\') {
int startIndex = 2;
while (startIndex < result) {
if (pFinal[startIndex] == '\\') {
startIndex++;
break;
}
else {
startIndex++;
}
}
if (startIndex == result)
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegalUNC"));
// Check for \\?\Globalroot, an internal mechanism to the kernel
// that provides aliases for drives and other undocumented stuff.
// The kernel team won't even describe the full set of what
// is available here - we don't want managed apps mucking
// with this for security reasons.
if (CharArrayStartsWithOrdinal(pFinal, len, "\\\\?\\globalroot", true))
throw new ArgumentException(Environment.GetResourceString("Arg_PathGlobalRoot"));
}
}
// Check our result and form the managed string as necessary.
if (len >= MaxPath)
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
if (result == 0) {
int errorCode = Marshal.GetLastWin32Error();
if (errorCode == 0)
errorCode = Win32Native.ERROR_BAD_PATHNAME;
__Error.WinIOError(errorCode, path);
return null; // Unreachable - silence a compiler error.
}
return new String(pFinal, 0, len);
}
private static bool CharArrayStartsWithOrdinal(char[] array, int numChars, String compareTo, bool ignoreCase)
{
if (numChars < compareTo.Length)
return false;
if (ignoreCase) {
String s = new String(array, 0, compareTo.Length);
return compareTo.Equals(s, StringComparison.OrdinalIgnoreCase);
}
else {
for(int i=0; i= MaxPath)
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
if (r == 0) {
// Note: GetLongPathName will return ERROR_INVALID_FUNCTION on a
// path like \\.\PHYSICALDEVICE0 - some device driver doesn't
// support GetLongPathName on that string. This behavior is
// by design, according to the Core File Services team.
// We also get ERROR_NOT_ENOUGH_QUOTA in SQL_CLR_STRESS runs
// intermittently on paths like D:\DO----E~1\user\LOCALS~1\Temp\
return false;
}
#if !FEATURE_PAL
// GetLongPathName on Win9x returns the length in TCHARS
if (Environment.nativeIsWin9x()) {
for (int i=0; i= MaxPath)
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
buffer[index] = value;
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
// This version allocates the path buffer on the stack instead of heap for perf
internal unsafe static String NormalizePathFast(String path, bool fullCheck) {
BCLDebug.Assert(path != null, "path can't be null");
// If we're doing a full path
// Win9x: to fixup path to replace multiple slashes with a single slash
if (fullCheck) {
// Trim whitespace off the end of the string.
path = path.TrimEnd();
// Look for illegal path characters.
CheckInvalidPathChars(path);
}
int index = 0;
// Allocating this on the stack instead of heap for workingset/perf gain.
// We need to be careful when we are indexing on the pointer as the operations
// are unsafe and not protected by bounds
char *newBuffer = stackalloc char[MaxPath];
int newBufferIndex = 0;
uint numSpaces = 0;
uint numDots = 0;
bool fixupDirectorySeparator = false;
// Number of significant chars other than potentially suppressible
// dots and spaces since the last directory or volume separator char
uint numSigChars = 0;
int lastSigChar = -1; // Index of last significant character.
// Whether this segment of the path (not the complete path) started
// with a volume separator char. Reject "c:...".
bool startedWithVolumeSeparator = false;
bool firstSegment = true;
bool mightBeShortFileName = false;
#if !PLATFORM_UNIX
// Win9x fixup - //server/share becomes c://server/share.
// This prevents our code from turning "\\server" into "\server".
// On Win9x, //server/share becomes c://server/share
if (path.Length > 0 && (path[0] == DirectorySeparatorChar || path[0] == AltDirectorySeparatorChar)) {
SafeSetStackPointerValue(newBuffer, newBufferIndex++, '\\');
index++;
lastSigChar = 0;
}
#endif
// Normalize the string, stripping out redundant dots, spaces, and
// slashes.
while (index < path.Length) {
char currentChar = path[index];
// We handle both directory separators and dots specially. For
// directory separators, we consume consecutive appearances.
// For dots, we consume all dots beyond the second in
// succession. All other characters are added as is. In
// addition we consume all spaces after the last other char
// in a directory name up until the directory separator.
if (currentChar == DirectorySeparatorChar || currentChar == AltDirectorySeparatorChar) {
// If we have a path like "123.../foo", remove the trailing dots.
// However, if we found "c:\temp\..\bar" or "c:\temp\...\bar", don't.
// Also remove trailing spaces from both files & directory names.
// This was agreed on with the OS team to fix undeletable directory
// names ending in spaces.
// If we saw a '\' as the previous last significant character and
// are simply going to write out dots, suppress them.
// If we only contain dots and slashes though, only allow
// a string like [dot]+ [space]*. Ignore everything else.
// Legal: "\.. \", "\...\", "\. \"
// Illegal: "\.. .\", "\. .\", "\ .\"
if (numSigChars == 0) {
// Dot and space handling
if (numDots > 0) {
// Look for ".[space]*" or "..[space]*"
int start = lastSigChar + 1;
if (path[start] != '.')
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
// Only allow "[dot]+[space]*", and normalize the
// legal ones to "." or ".."
if (numDots >= 2) {
// Reject "C:..."
if (startedWithVolumeSeparator && numDots > 2)
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
if (path[start + 1] == '.') {
// Search for a space in the middle of the
// dots and throw
for(int i=start + 2; i < start + numDots; i++) {
if (path[i] != '.')
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
}
numDots = 2;
}
else {
if (numDots > 1)
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
numDots = 1;
}
}
if (numDots == 2) {
SafeSetStackPointerValue(newBuffer, newBufferIndex++, '.');
}
SafeSetStackPointerValue(newBuffer, newBufferIndex++, '.');
fixupDirectorySeparator = false;
// Continue in this case, potentially writing out '\'.
}
if (numSpaces > 0 && firstSegment) {
// Handle strings like " \\server\share".
if (index + 1 < path.Length &&
(path[index + 1] == DirectorySeparatorChar || path[index + 1] == AltDirectorySeparatorChar))
{
SafeSetStackPointerValue(newBuffer, newBufferIndex++, DirectorySeparatorChar);
}
}
}
numDots = 0;
numSpaces = 0; // Suppress trailing spaces
if (!fixupDirectorySeparator) {
fixupDirectorySeparator = true;
SafeSetStackPointerValue(newBuffer, newBufferIndex++, DirectorySeparatorChar);
}
numSigChars = 0;
lastSigChar = index;
startedWithVolumeSeparator = false;
firstSegment = false;
#if !PLATFORM_UNIX
// For short file names, we must try to expand each of them as
// soon as possible. We need to allow people to specify a file
// name that doesn't exist using a path with short file names
// in it, such as this for a temp file we're trying to create:
// C:\DO----E~1\USERNA~1.RED\LOCALS~1\Temp\bg3ylpzp
// We could try doing this afterwards piece by piece, but it's
// probably a lot simpler to do it here.
if (mightBeShortFileName) {
SafeSetStackPointerValue(newBuffer, newBufferIndex, '\0');
TryExpandShortFileName(newBuffer, ref newBufferIndex, MAX_PATH);
mightBeShortFileName = false;
}
#endif
} // if (Found directory separator)
else if (currentChar == '.') {
// Reduce only multiple .'s only after slash to 2 dots. For
// instance a...b is a valid file name.
numDots++;
// Don't flush out non-terminal spaces here, because they may in
// the end not be significant. Turn "c:\ . .\foo" -> "c:\foo"
// which is the conclusion of removing trailing dots & spaces,
// as well as folding multiple '\' characters.
}
else if (currentChar == ' ') {
numSpaces++;
}
else { // Normal character logic
#if !PLATFORM_UNIX
if (currentChar == '~')
mightBeShortFileName = true;
#endif
fixupDirectorySeparator = false;
#if !PLATFORM_UNIX
// To reject strings like "C:...\foo" and "C :\foo"
if (firstSegment && currentChar == VolumeSeparatorChar) {
// Only accept "C:", not "c :" or ":"
// Get a drive letter or ' ' if index is 0.
char driveLetter = (index > 0) ? path[index-1] : ' ';
bool validPath = ((numDots == 0) && (numSigChars >= 1) && (driveLetter != ' '));
if (!validPath)
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
startedWithVolumeSeparator = true;
// We need special logic to make " c:" work, we should not fix paths like " foo::$DATA"
if (numSigChars > 1) { // Common case, simply do nothing
uint spaceCount = 0; // How many spaces did we write out, numSpaces has already been reset.
while((spaceCount < newBufferIndex) && newBuffer[spaceCount] == ' ')
spaceCount++;
if (numSigChars - spaceCount == 1) {
//Safe to update stack ptr directly
newBuffer[0] = driveLetter; // Overwrite spaces, we need a special case to not break " foo" as a relative path.
newBufferIndex=1;
}
}
numSigChars = 0;
}
else
#endif // !PLATFORM_UNIX
{
numSigChars += 1 + numDots + numSpaces;
}
// Copy any spaces & dots since the last significant character
// to here. Note we only counted the number of dots & spaces,
// and don't know what order they're in. Hence the copy.
if (numDots > 0 || numSpaces > 0) {
int numCharsToCopy = (lastSigChar >= 0) ? index - lastSigChar - 1 : index;
if (numCharsToCopy > 0) {
for (int i=0; i "C:\foo", while "C:\." -> "C:\"
if (numSigChars == 0) {
if (numDots > 0) {
// Look for ".[space]*" or "..[space]*"
int start = lastSigChar + 1;
if (path[start] != '.')
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
// Only allow "[dot]+[space]*", and normalize the
// legal ones to "." or ".."
if (numDots >= 2) {
// Reject "C:..."
if (startedWithVolumeSeparator && numDots > 2)
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
if (path[start + 1] == '.') {
// Search for a space in the middle of the
// dots and throw
for(int i=start + 2; i < start + numDots; i++) {
if (path[i] != '.')
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
}
numDots = 2;
}
else {
if (numDots > 1)
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
numDots = 1;
}
}
if (numDots == 2) {
SafeSetStackPointerValue(newBuffer, newBufferIndex++, '.');
}
SafeSetStackPointerValue(newBuffer, newBufferIndex++, '.');
}
} // if (numSigChars == 0)
// If we ended up eating all the characters, bail out.
if (newBufferIndex == 0)
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegal"));
// Null terminate the buffer. We will allow at most a path of length MaxPath-1 (accounting for the null terminating char).
SafeSetStackPointerValue(newBuffer, newBufferIndex, '\0');
// Disallow URL's here. Some of our other Win32 API calls will reject
// them later, so we might be better off rejecting them here.
// Note we've probably turned them into "file:\D:\foo.tmp" by now.
// But for compatibility, ensure that callers that aren't doing a
// full
if (fullCheck &&
(CharArrayStartsWithOrdinal(newBuffer, newBufferIndex, "http:", false) ||
CharArrayStartsWithOrdinal(newBuffer, newBufferIndex, "file:", false)))
throw new ArgumentException(Environment.GetResourceString("Argument_PathUriFormatNotSupported"));
#if !PLATFORM_UNIX
// If the last part of the path (file or directory name) had a tilde,
// expand that too.
if (mightBeShortFileName) {
TryExpandShortFileName(newBuffer, ref newBufferIndex, MaxPath);
}
#endif
// Call the Win32 API to do the final canonicalization step.
int result = 1;
char *pFinal;
int len;
if (fullCheck) {
//
// Ideally we would get the required buffer length first by calling GetFullPathName
// once without the buffer and use that in the later call but this doesn't always work
// due to Win32 GetFullPathName
char *finalBuffer = stackalloc char[MaxPath + 1];
result = Win32Native.GetFullPathName(newBuffer, MaxPath + 1, finalBuffer, IntPtr.Zero);
// If success, the return buffer length does not account for the terminating null character.
// If in-sufficient buffer, the return buffer length does account for the path + the terminating null character.
// If failure, the return buffer length is zero
if (result > MaxPath) {
char *tempBuffer = stackalloc char[result];
finalBuffer = tempBuffer;
result = Win32Native.GetFullPathName(newBuffer, result, finalBuffer, IntPtr.Zero);
}
// Fullpath is genuinely long
if (result >= MaxPath)
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
BCLDebug.Assert(result < MaxPath, "did we accidently remove a PathTooLongException check?");
if (result == 0 && newBuffer[0] != '\0') {
__Error.WinIOError();
}
else if (result < MaxPath) {
// Null terminate explicitly (may be only needed for some cases such as empty strings)
// GetFullPathName return length doesn't account for null terminating char...
finalBuffer[result] = '\0'; // Safe to write directly as result is < MaxPath
}
pFinal = finalBuffer;
// Doesn't account for null terminating char. Think of this as the last
// valid index into the buffer but not the length of the buffer
len = result;
#if !PLATFORM_UNIX
// If we called GetFullPathName with something like "foo" and our
// command window was in short file name mode (ie, by running edlin or
// DOS versions of grep, etc), we might have gotten back a short file
// name. So,
mightBeShortFileName = false;
for(uint i=0; i=0; i--) {
if (finalBuffer[i] == DirectorySeparatorChar) {
lastSlash = i;
break;
}
}
if (lastSlash >= 0) {
// This bounds
if (len >= MaxPath)
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
int lenSavedName = len - lastSlash - 1;
BCLDebug.Assert(lastSlash < len, "path unexpectedly ended in a '\'");
char* savedName = stackalloc char[lenSavedName];
Buffer.memcpy(finalBuffer, lastSlash + 1, savedName, 0, lenSavedName);
SafeSetStackPointerValue(finalBuffer, lastSlash, '\0');
r = TryExpandShortFileName(finalBuffer, ref lastSlash, MaxPath);
// Clean up changes made to the finalBuffer.
SafeSetStackPointerValue(finalBuffer, lastSlash, DirectorySeparatorChar);
if (lastSlash + 1 + lenSavedName >= MaxPath)
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
Buffer.memcpy(savedName, 0, finalBuffer, lastSlash + 1, lenSavedName);
if (r)
len = lastSlash + 1 + lenSavedName;
}
}
}
#endif
}
else {
pFinal = newBuffer;
len = newBufferIndex;
}
if (result != 0) {
/* Throw an ArgumentException for paths like \\, \\server, \\server\
This
*/
if (pFinal[0] == '\\' && pFinal[1] == '\\') {
int startIndex = 2;
while (startIndex < result) {
if (pFinal[startIndex] == '\\') {
startIndex++;
break;
}
else {
startIndex++;
}
}
if (startIndex == result)
throw new ArgumentException(Environment.GetResourceString("Arg_PathIllegalUNC"));
// Check for \\?\Globalroot, an internal mechanism to the kernel
// that provides aliases for drives and other undocumented stuff.
// The kernel team won't even describe the full set of what
// is available here - we don't want managed apps mucking
// with this for security reasons.
if (CharArrayStartsWithOrdinal(pFinal, len, "\\\\?\\globalroot", true))
throw new ArgumentException(Environment.GetResourceString("Arg_PathGlobalRoot"));
}
}
// Check our result and form the managed string as necessary.
if (len >= MaxPath)
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
if (result == 0) {
int errorCode = Marshal.GetLastWin32Error();
if (errorCode == 0)
errorCode = Win32Native.ERROR_BAD_PATHNAME;
__Error.WinIOError(errorCode, path);
return null; // Unreachable - silence a compiler error.
}
return new String(pFinal, 0, len);
}
private static unsafe bool CharArrayStartsWithOrdinal(char* array, int numChars, String compareTo, bool ignoreCase)
{
if (numChars < compareTo.Length)
return false;
if (ignoreCase) {
String s = new String(array, 0, compareTo.Length);
return compareTo.Equals(s, StringComparison.OrdinalIgnoreCase);
}
else {
for(int i=0; i= MaxPath)
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
if (r == 0) {
// Note: GetLongPathName will return ERROR_INVALID_FUNCTION on a
// path like \\.\PHYSICALDEVICE0 - some device driver doesn't
// support GetLongPathName on that string. This behavior is
// by design, according to the Core File Services team.
// We also get ERROR_NOT_ENOUGH_QUOTA in SQL_CLR_STRESS runs
// intermittently on paths like D:\DO----E~1\user\LOCALS~1\Temp\
return false;
}
// Safe to copy as we have already done MaxPath bound checking
Buffer.memcpy(shortFileNameBuffer, 0, buffer, 0, r);
bufferLength = r;
// We should explicitly null terminate as in some cases the long version of the path
// might actually be shorter than what we started with because of Win32's normailization
// Safe to write directly as bufferLength is guaranteed to be < MaxPath
buffer[bufferLength] = '\0';
return true;
}
// Win9x: to fixup path to replace multiple slashes with a single slash
// This is marked as exposing no resources because it calls
// NormalizePath and passes in false for fullCheck. This is mostly
// used to simply clean up the format of the string, but not to fully
// qualify it.
[ResourceExposure(ResourceScope.None)]
[ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)]
internal static String FixupPath(String path)
{
String newPath = NormalizePath(path, false);
return newPath;
}
// Returns the name and extension parts of the given path. The resulting
// string contains the characters of path that follow the last
// backslash ("\"), slash ("/"), or colon (":") character in
// path. The resulting string is the entire path if path
// contains no backslash after removing trailing slashes, slash, or colon characters. The resulting
// string is null if path is null.
//
public static String GetFileName(String path) {
if (path != null) {
CheckInvalidPathChars(path);
int length = path.Length;
for (int i = length; --i >= 0;) {
char ch = path[i];
if (ch == DirectorySeparatorChar || ch == AltDirectorySeparatorChar || ch == VolumeSeparatorChar)
return path.Substring(i + 1, length - i - 1);
}
}
return path;
}
public static String GetFileNameWithoutExtension(String path) {
path = GetFileName(path);
if (path != null)
{
int i;
if ((i=path.LastIndexOf('.')) == -1)
return path; // No path extension found
else
return path.Substring(0,i);
}
return null;
}
// Returns the root portion of the given path. The resulting string
// consists of those rightmost characters of the path that constitute the
// root of the path. Possible patterns for the resulting string are: An
// empty string (a relative path on the current drive), "\" (an absolute
// path on the current drive), "X:" (a relative path on a given drive,
// where X is the drive letter), "X:\" (an absolute path on a given drive),
// and "\\server\share" (a UNC path for a given server and share name).
// The resulting string is null if path is null.
//
public static String GetPathRoot(String path) {
if (path == null) return null;
path = FixupPath(path);
return path.Substring(0, GetRootLength(path));
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static String GetTempPath()
{
new EnvironmentPermission(PermissionState.Unrestricted).Demand();
StringBuilder sb = new StringBuilder(MAX_PATH);
uint r = Win32Native.GetTempPath(MAX_PATH, sb);
String path = sb.ToString();
if (r==0) __Error.WinIOError();
path = GetFullPathInternal(path);
return path;
}
// Returns a cryptographically strong random 8.3 string that can be
// used as either a folder name or a file name.
public static String GetRandomFileName()
{
// 5 bytes == 40 bits == 40/5 == 8 chars in our encoding
// This gives us exactly 8 chars. We want to avoid the 8.3 short name issue
byte[] key = new byte[10];
RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();
rng.GetBytes(key);
// rndCharArray is expected to be 16 chars
char[] rndCharArray = System.IO.IsolatedStorage.IsolatedStorage.ToBase32StringSuitableForDirName(key).ToCharArray();
rndCharArray[8] = '.';
return new String(rndCharArray, 0, 12);
}
// Returns a unique temporary file name, and creates a 0-byte file by that
// name on disk.
[ResourceExposure(ResourceScope.AppDomain)]
[ResourceConsumption(ResourceScope.Machine)]
public static String GetTempFileName()
{
String path = GetTempPath();
// Since this can write to the temp directory and theoretically
// cause a denial of service attack, demand FileIOPermission to
// that directory.
new FileIOPermission(FileIOPermissionAccess.Write, path).Demand();
StringBuilder sb = new StringBuilder(MAX_PATH);
uint r = Win32Native.GetTempFileName(path, "tmp", 0, sb);
if (r==0) __Error.WinIOError();
return sb.ToString();
}
// Tests if a path includes a file extension. The result is
// true if the characters that follow the last directory
// separator ('\\' or '/') or volume separator (':') in the path include
// a period (".") other than a terminal period. The result is false otherwise.
//
public static bool HasExtension(String path) {
if (path != null) {
CheckInvalidPathChars(path);
for (int i = path.Length; --i >= 0;) {
char ch = path[i];
if (ch == '.') {
if ( i != path.Length - 1)
return true;
else
return false;
}
if (ch == DirectorySeparatorChar || ch == AltDirectorySeparatorChar || ch == VolumeSeparatorChar) break;
}
}
return false;
}
// Tests if the given path contains a root. A path is considered rooted
// if it starts with a backslash ("\") or a drive letter and a colon (":").
//
public static bool IsPathRooted(String path) {
if (path != null) {
CheckInvalidPathChars(path);
int length = path.Length;
if ((length >= 1 && (path[0] == DirectorySeparatorChar || path[0] == AltDirectorySeparatorChar))
#if !PLATFORM_UNIX
|| (length >= 2 && path[1] == VolumeSeparatorChar)
#endif
) return true;
}
return false;
}
public static String Combine(String path1, String path2) {
if (path1==null || path2==null)
throw new ArgumentNullException((path1==null) ? "path1" : "path2");
CheckInvalidPathChars(path1);
CheckInvalidPathChars(path2);
if (path2.Length == 0)
return path1;
if (path1.Length == 0)
return path2;
if (IsPathRooted(path2))
return path2;
char ch = path1[path1.Length - 1];
if (ch != DirectorySeparatorChar && ch != AltDirectorySeparatorChar && ch != VolumeSeparatorChar)
return path1 + DirectorySeparatorChar + path2;
return path1 + path2;
}
// ".." can only be used if it is specified as a part of a valid File/Directory name. We disallow
// the user being able to use it to move up directories. Here are some examples eg
// Valid: a..b abc..d
// Invalid: ..ab ab.. .. abc..d\abc..
//
internal static void CheckSearchPattern(String searchPattern)
{
int index;
#if !FEATURE_PAL
// Only
if ((Environment.OSInfo & Environment.OSName.Win9x) != 0 && CanPathCircumventSecurityNative(searchPattern))
throw new ArgumentException(Environment.GetResourceString("Arg_InvalidSearchPattern"));
#endif // !FEATURE_PAL
while ((index = searchPattern.IndexOf("..", StringComparison.Ordinal)) != -1) {
if (index + 2 == searchPattern.Length) // Terminal ".." . Files names cannot end in ".."
throw new ArgumentException(Environment.GetResourceString("Arg_InvalidSearchPattern"));
if ((searchPattern[index+2] == DirectorySeparatorChar)
|| (searchPattern[index+2] == AltDirectorySeparatorChar))
throw new ArgumentException(Environment.GetResourceString("Arg_InvalidSearchPattern"));
searchPattern = searchPattern.Substring(index + 2);
}
}
internal static void CheckInvalidPathChars(String path)
{
#if PLATFORM_UNIX
if( path.StartsWith("\\\\"))
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidPathChars"));
#endif // PLATFORM_UNIX
for (int i = 0; i < path.Length; i++)
{
int c = path[i];
// Note: This list is duplicated in static char[] InvalidPathChars
if (c == '\"' || c == '<' || c == '>' || c == '|' || c < 32)
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidPathChars"));
}
}
internal static String InternalCombine(String path1, String path2) {
if (path1==null || path2==null)
throw new ArgumentNullException((path1==null) ? "path1" : "path2");
CheckInvalidPathChars(path1);
CheckInvalidPathChars(path2);
if (path2.Length == 0)
throw new ArgumentException(Environment.GetResourceString("Argument_PathEmpty"), "path2");
if (IsPathRooted(path2))
throw new ArgumentException(Environment.GetResourceString("Arg_Path2IsRooted"), "path2");
int i = path1.Length;
if (i == 0) return path2;
char ch = path1[i - 1];
if (ch != DirectorySeparatorChar && ch != AltDirectorySeparatorChar && ch != VolumeSeparatorChar)
return path1 + DirectorySeparatorChar + path2;
return path1 + path2;
}
#if !FEATURE_PAL
// Checks for Unicode characters that map to potentially dangerous
// characters in the system's default ANSI code page.
[MethodImplAttribute(MethodImplOptions.InternalCall)]
private static extern bool CanPathCircumventSecurityNative(String partOfPath);
#endif // !FEATURE_PAL
// Windows API definitions
internal const int MAX_PATH = 260; // From WinDef.h
internal const int MAX_DIRECTORY_PATH = 248; // cannot create directories greater than 248 characters
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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- AttachedPropertyDescriptor.cs
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