The Tor Browser: xpcom/io/nsLocalFileWin.cpp@97036ab72558 (annotated)

xpcom/io/nsLocalFileWin.cpp@97036ab72558 (annotated)

xpcom/io/nsLocalFileWin.cpp

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "mozilla/ArrayUtils.h"
 #include "mozilla/DebugOnly.h"
 #include "mozilla/WindowsVersion.h"
 #include "nsCOMPtr.h"
 #include "nsAutoPtr.h"
 #include "nsMemory.h"
 #include "nsLocalFile.h"
 #include "nsIDirectoryEnumerator.h"
 #include "nsNativeCharsetUtils.h"
 #include "nsISimpleEnumerator.h"
 #include "nsIComponentManager.h"
 #include "prio.h"
 #include "private/pprio.h"  // To get PR_ImportFile
 #include "prprf.h"
 #include "prmem.h"
 #include "nsHashKeys.h"
 #include "nsXPIDLString.h"
 #include "nsReadableUtils.h"
 #include <direct.h>
 #include <windows.h>
 #include <shlwapi.h>
 #include <aclapi.h>
 #include "shellapi.h"
 #include "shlguid.h"
 #include  <io.h>
 #include  <stdio.h>
 #include  <stdlib.h>
 #include  <mbstring.h>
 #include "nsXPIDLString.h"
 #include "prproces.h"
 #include "prlink.h"
 #include "mozilla/Mutex.h"
 #include "SpecialSystemDirectory.h"
 #include "nsTraceRefcnt.h"
 #include "nsXPCOMCIDInternal.h"
 #include "nsThreadUtils.h"
 #include "nsXULAppAPI.h"
 using namespace mozilla;
 #define CHECK_mWorkingPath()                    \
     PR_BEGIN_MACRO                              \
         if (mWorkingPath.IsEmpty())             \
             return NS_ERROR_NOT_INITIALIZED;    \
     PR_END_MACRO
 // CopyFileEx only supports unbuffered I/O in Windows Vista and above
 #ifndef COPY_FILE_NO_BUFFERING
 #define COPY_FILE_NO_BUFFERING 0x00001000
 #endif
 #ifndef FILE_ATTRIBUTE_NOT_CONTENT_INDEXED
 #define FILE_ATTRIBUTE_NOT_CONTENT_INDEXED  0x00002000
 #endif
 #ifndef DRIVE_REMOTE
 #define DRIVE_REMOTE 4
 #endif
 /**
  * A runnable to dispatch back to the main thread when
  * AsyncLocalFileWinOperation completes.
 */
 class AsyncLocalFileWinDone : public nsRunnable
 {
 public:
     AsyncLocalFileWinDone() :
         mWorkerThread(do_GetCurrentThread())
     {
         // Objects of this type must only be created on worker threads
         MOZ_ASSERT(!NS_IsMainThread());
     }
     NS_IMETHOD Run() {
         // This event shuts down the worker thread and so must be main thread.
         MOZ_ASSERT(NS_IsMainThread());
         // If we don't destroy the thread when we're done with it, it will hang
         // around forever... and that is bad!
         mWorkerThread->Shutdown();
         return NS_OK;
     }
 private:
     nsCOMPtr<nsIThread> mWorkerThread;
 };
 /**
  * A runnable to dispatch from the main thread when an async operation should
  * be performed.
 */
 class AsyncLocalFileWinOperation : public nsRunnable
 {
 public:
     enum FileOp { RevealOp, LaunchOp };
     AsyncLocalFileWinOperation(AsyncLocalFileWinOperation::FileOp aOperation,
                                const nsAString &aResolvedPath) :
         mOperation(aOperation),
         mResolvedPath(aResolvedPath)
     {
     }
     NS_IMETHOD Run() {
         MOZ_ASSERT(!NS_IsMainThread(),
             "AsyncLocalFileWinOperation should not be run on the main thread!");
         CoInitialize(nullptr);
         switch(mOperation) {
         case RevealOp: {
             Reveal();
         }
         break;
         case LaunchOp: {
             Launch();
         }
         break;
         }
         CoUninitialize();
         // Send the result back to the main thread so that it can shutdown
         nsCOMPtr<nsIRunnable> resultrunnable = new AsyncLocalFileWinDone();
         NS_DispatchToMainThread(resultrunnable);
         return NS_OK;
     }
 private:
     // Reveals the path in explorer.
     nsresult Reveal()
     {
         DWORD attributes = GetFileAttributesW(mResolvedPath.get());
         if (INVALID_FILE_ATTRIBUTES == attributes) {
             return NS_ERROR_FILE_INVALID_PATH;
         }
         HRESULT hr;
         if (attributes & FILE_ATTRIBUTE_DIRECTORY) {
             // We have a directory so we should open the directory itself.
             ITEMIDLIST *dir = ILCreateFromPathW(mResolvedPath.get());
             if (!dir) {
               return NS_ERROR_FAILURE;
             }
             const ITEMIDLIST* selection[] = { dir };
             UINT count = ArrayLength(selection);
             //Perform the open of the directory.
             hr = SHOpenFolderAndSelectItems(dir, count, selection, 0);
             CoTaskMemFree(dir);
         } else {
             int32_t len = mResolvedPath.Length();
             // We don't currently handle UNC long paths of the form \\?\ anywhere so
             // this should be fine.
             if (len > MAX_PATH) {
                 return NS_ERROR_FILE_INVALID_PATH;
             }
             WCHAR parentDirectoryPath[MAX_PATH + 1] = { 0 };
             wcsncpy(parentDirectoryPath, mResolvedPath.get(), MAX_PATH);
             PathRemoveFileSpecW(parentDirectoryPath);
             // We have a file so we should open the parent directory.
             ITEMIDLIST *dir = ILCreateFromPathW(parentDirectoryPath);
             if (!dir) {
                 return NS_ERROR_FAILURE;
             }
             // Set the item in the directory to select to the file we want to reveal.
             ITEMIDLIST *item = ILCreateFromPathW(mResolvedPath.get());
             if (!item) {
                 CoTaskMemFree(dir);
                 return NS_ERROR_FAILURE;
             }
             const ITEMIDLIST* selection[] = { item };
             UINT count = ArrayLength(selection);
             //Perform the selection of the file.
             hr = SHOpenFolderAndSelectItems(dir, count, selection, 0);
             CoTaskMemFree(dir);
             CoTaskMemFree(item);
         }
         return SUCCEEDED(hr) ? NS_OK : NS_ERROR_FAILURE;
     }
     // Launches the default shell operation for the file path
     nsresult Launch()
     {
         // use the app registry name to launch a shell execute....
         SHELLEXECUTEINFOW seinfo;
         memset(&seinfo, 0, sizeof(seinfo));
         seinfo.cbSize = sizeof(SHELLEXECUTEINFOW);
         if (XRE_GetWindowsEnvironment() == WindowsEnvironmentType_Metro) {
           seinfo.fMask  = SEE_MASK_FLAG_LOG_USAGE;
         }
         seinfo.hwnd   = nullptr;
         seinfo.lpVerb = nullptr;
         seinfo.lpFile = mResolvedPath.get();
         seinfo.lpParameters =  nullptr;
         seinfo.lpDirectory  = nullptr;
         seinfo.nShow  = SW_SHOWNORMAL;
         // Use the directory of the file we're launching as the working
         // directory.  That way if we have a self extracting EXE it won't
         // suggest to extract to the install directory.
         WCHAR workingDirectory[MAX_PATH + 1] = { L'\0' };
         wcsncpy(workingDirectory,  mResolvedPath.get(), MAX_PATH);
         if (PathRemoveFileSpecW(workingDirectory)) {
             seinfo.lpDirectory = workingDirectory;
         } else {
             NS_WARNING("Could not set working directory for launched file.");
         }
         if (ShellExecuteExW(&seinfo)) {
             return NS_OK;
         }
         DWORD r = GetLastError();
         // if the file has no association, we launch windows'
         // "what do you want to do" dialog
         if (r == SE_ERR_NOASSOC) {
             nsAutoString shellArg;
             shellArg.Assign(NS_LITERAL_STRING("shell32.dll,OpenAs_RunDLL ") +
                             mResolvedPath);
             seinfo.lpFile = L"RUNDLL32.EXE";
             seinfo.lpParameters = shellArg.get();
             if (ShellExecuteExW(&seinfo))
                 return NS_OK;
             r = GetLastError();
         }
         if (r < 32) {
             switch (r) {
               case 0:
               case SE_ERR_OOM:
                   return NS_ERROR_OUT_OF_MEMORY;
               case ERROR_FILE_NOT_FOUND:
                   return NS_ERROR_FILE_NOT_FOUND;
               case ERROR_PATH_NOT_FOUND:
                   return NS_ERROR_FILE_UNRECOGNIZED_PATH;
               case ERROR_BAD_FORMAT:
                   return NS_ERROR_FILE_CORRUPTED;
               case SE_ERR_ACCESSDENIED:
                   return NS_ERROR_FILE_ACCESS_DENIED;
               case SE_ERR_ASSOCINCOMPLETE:
               case SE_ERR_NOASSOC:
                   return NS_ERROR_UNEXPECTED;
               case SE_ERR_DDEBUSY:
               case SE_ERR_DDEFAIL:
               case SE_ERR_DDETIMEOUT:
                   return NS_ERROR_NOT_AVAILABLE;
               case SE_ERR_DLLNOTFOUND:
                   return NS_ERROR_FAILURE;
               case SE_ERR_SHARE:
                   return NS_ERROR_FILE_IS_LOCKED;
               default:
                   return NS_ERROR_FILE_EXECUTION_FAILED;
             }
         }
         return NS_OK;
     }
     // Stores the operation that will be performed on the thread
     AsyncLocalFileWinOperation::FileOp mOperation;
     // Stores the path to perform the operation on
     nsString mResolvedPath;
 };
 class nsDriveEnumerator : public nsISimpleEnumerator
 {
 public:
     nsDriveEnumerator();
     virtual ~nsDriveEnumerator();
     NS_DECL_ISUPPORTS
     NS_DECL_NSISIMPLEENUMERATOR
     nsresult Init();
 private:
     /* mDrives stores the null-separated drive names.
      * Init sets them.
      * HasMoreElements checks mStartOfCurrentDrive.
      * GetNext advances mStartOfCurrentDrive.
      */
     nsString mDrives;
     nsAString::const_iterator mStartOfCurrentDrive;
     nsAString::const_iterator mEndOfDrivesString;
 };
 //----------------------------------------------------------------------------
 // short cut resolver
 //----------------------------------------------------------------------------
 class ShortcutResolver
 {
 public:
     ShortcutResolver();
     // nonvirtual since we're not subclassed
     ~ShortcutResolver();
     nsresult Init();
     nsresult Resolve(const WCHAR* in, WCHAR* out);
     nsresult SetShortcut(bool updateExisting,
                          const WCHAR* shortcutPath,
                          const WCHAR* targetPath,
                          const WCHAR* workingDir,
                          const WCHAR* args,
                          const WCHAR* description,
                          const WCHAR* iconFile,
                          int32_t iconIndex);
 private:
     Mutex                  mLock;
     nsRefPtr<IPersistFile> mPersistFile;
     nsRefPtr<IShellLinkW>  mShellLink;
 };
 ShortcutResolver::ShortcutResolver() :
     mLock("ShortcutResolver.mLock")
 {
     CoInitialize(nullptr);
 }
 ShortcutResolver::~ShortcutResolver()
 {
     CoUninitialize();
 }
 nsresult
 ShortcutResolver::Init()
 {
     // Get a pointer to the IPersistFile interface.
     if (FAILED(CoCreateInstance(CLSID_ShellLink,
                                 nullptr,
                                 CLSCTX_INPROC_SERVER,
                                 IID_IShellLinkW,
                                 getter_AddRefs(mShellLink))) ||
         FAILED(mShellLink->QueryInterface(IID_IPersistFile,
                                           getter_AddRefs(mPersistFile)))) {
         mShellLink = nullptr;
         return NS_ERROR_FAILURE;
     }
     return NS_OK;
 }
 // |out| must be an allocated buffer of size MAX_PATH
 nsresult
 ShortcutResolver::Resolve(const WCHAR* in, WCHAR* out)
 {
     if (!mShellLink)
         return NS_ERROR_FAILURE;
     MutexAutoLock lock(mLock);
     if (FAILED(mPersistFile->Load(in, STGM_READ)) ||
         FAILED(mShellLink->Resolve(nullptr, SLR_NO_UI)) ||
         FAILED(mShellLink->GetPath(out, MAX_PATH, nullptr, SLGP_UNCPRIORITY)))
         return NS_ERROR_FAILURE;
     return NS_OK;
 }
 nsresult
 ShortcutResolver::SetShortcut(bool updateExisting,
                               const WCHAR* shortcutPath,
                               const WCHAR* targetPath,
                               const WCHAR* workingDir,
                               const WCHAR* args,
                               const WCHAR* description,
                               const WCHAR* iconPath,
                               int32_t iconIndex)
 {
     if (!mShellLink) {
       return NS_ERROR_FAILURE;
     }
     if (!shortcutPath) {
       return NS_ERROR_FAILURE;
     }
     MutexAutoLock lock(mLock);
     if (updateExisting) {
       if (FAILED(mPersistFile->Load(shortcutPath, STGM_READWRITE))) {
         return NS_ERROR_FAILURE;
       }
     } else {
       if (!targetPath) {
         return NS_ERROR_FILE_TARGET_DOES_NOT_EXIST;
       }
       // Since we reuse our IPersistFile, we have to clear out any values that
       // may be left over from previous calls to SetShortcut.
       if (FAILED(mShellLink->SetWorkingDirectory(L""))
        || FAILED(mShellLink->SetArguments(L""))
        || FAILED(mShellLink->SetDescription(L""))
        || FAILED(mShellLink->SetIconLocation(L"", 0))) {
         return NS_ERROR_FAILURE;
       }
     }
     if (targetPath && FAILED(mShellLink->SetPath(targetPath))) {
       return NS_ERROR_FAILURE;
     }
     if (workingDir && FAILED(mShellLink->SetWorkingDirectory(workingDir))) {
       return NS_ERROR_FAILURE;
     }
     if (args && FAILED(mShellLink->SetArguments(args))) {
       return NS_ERROR_FAILURE;
     }
     if (description && FAILED(mShellLink->SetDescription(description))) {
       return NS_ERROR_FAILURE;
     }
     if (iconPath && FAILED(mShellLink->SetIconLocation(iconPath, iconIndex))) {
       return NS_ERROR_FAILURE;
     }
     if (FAILED(mPersistFile->Save(shortcutPath,
                                   TRUE))) {
       // Second argument indicates whether the file path specified in the
       // first argument should become the "current working file" for this
       // IPersistFile
       return NS_ERROR_FAILURE;
     }
     return NS_OK;
 }
 static ShortcutResolver * gResolver = nullptr;
 static nsresult NS_CreateShortcutResolver()
 {
     gResolver = new ShortcutResolver();
     if (!gResolver)
         return NS_ERROR_OUT_OF_MEMORY;
     return gResolver->Init();
 }
 static void NS_DestroyShortcutResolver()
 {
     delete gResolver;
     gResolver = nullptr;
 }
 //-----------------------------------------------------------------------------
 // static helper functions
 //-----------------------------------------------------------------------------
 // certainly not all the error that can be
 // encountered, but many of them common ones
 static nsresult ConvertWinError(DWORD winErr)
 {
     nsresult rv;
     switch (winErr)
     {
         case ERROR_FILE_NOT_FOUND:
         case ERROR_PATH_NOT_FOUND:
         case ERROR_INVALID_DRIVE:
             rv = NS_ERROR_FILE_NOT_FOUND;
             break;
         case ERROR_ACCESS_DENIED:
         case ERROR_NOT_SAME_DEVICE:
             rv = NS_ERROR_FILE_ACCESS_DENIED;
             break;
         case ERROR_SHARING_VIOLATION: // CreateFile without sharing flags
         case ERROR_LOCK_VIOLATION: // LockFile, LockFileEx
             rv = NS_ERROR_FILE_IS_LOCKED;
             break;
         case ERROR_NOT_ENOUGH_MEMORY:
         case ERROR_INVALID_BLOCK:
         case ERROR_INVALID_HANDLE:
         case ERROR_ARENA_TRASHED:
             rv = NS_ERROR_OUT_OF_MEMORY;
             break;
         case ERROR_CURRENT_DIRECTORY:
             rv = NS_ERROR_FILE_DIR_NOT_EMPTY;
             break;
         case ERROR_WRITE_PROTECT:
             rv = NS_ERROR_FILE_READ_ONLY;
             break;
         case ERROR_HANDLE_DISK_FULL:
             rv = NS_ERROR_FILE_TOO_BIG;
             break;
         case ERROR_FILE_EXISTS:
         case ERROR_ALREADY_EXISTS:
         case ERROR_CANNOT_MAKE:
             rv = NS_ERROR_FILE_ALREADY_EXISTS;
             break;
         case ERROR_FILENAME_EXCED_RANGE:
             rv = NS_ERROR_FILE_NAME_TOO_LONG;
             break;
         case ERROR_DIRECTORY:
             rv = NS_ERROR_FILE_NOT_DIRECTORY;
             break;
         case 0:
             rv = NS_OK;
             break;
         default:
             rv = NS_ERROR_FAILURE;
             break;
     }
     return rv;
 }
 // as suggested in the MSDN documentation on SetFilePointer
 static __int64
 MyFileSeek64(HANDLE aHandle, __int64 aDistance, DWORD aMoveMethod)
 {
     LARGE_INTEGER li;
     li.QuadPart = aDistance;
     li.LowPart = SetFilePointer(aHandle, li.LowPart, &li.HighPart, aMoveMethod);
     if (li.LowPart == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR)
     {
         li.QuadPart = -1;
     }
     return li.QuadPart;
 }
 static bool
 IsShortcutPath(const nsAString &path)
 {
     // Under Windows, the shortcuts are just files with a ".lnk" extension.
     // Note also that we don't resolve links in the middle of paths.
     // i.e. "c:\foo.lnk\bar.txt" is invalid.
     NS_ABORT_IF_FALSE(!path.IsEmpty(), "don't pass an empty string");
     int32_t len = path.Length();
     return len >= 4 && (StringTail(path, 4).LowerCaseEqualsASCII(".lnk"));
 }
 //-----------------------------------------------------------------------------
 // We need the following three definitions to make |OpenFile| convert a file
 // handle to an NSPR file descriptor correctly when |O_APPEND| flag is
 // specified. It is defined in a private header of NSPR (primpl.h) we can't
 // include. As a temporary workaround until we decide how to extend
 // |PR_ImportFile|, we define it here. Currently, |_PR_HAVE_PEEK_BUFFER|
 // and |PR_STRICT_ADDR_LEN| are not defined for the 'w95'-dependent portion
 // of NSPR so that fields of |PRFilePrivate| #ifdef'd by them are not copied.
 // Similarly, |_MDFileDesc| is taken from nsprpub/pr/include/md/_win95.h.
 // In an unlikely case we switch to 'NT'-dependent NSPR AND this temporary
 // workaround last beyond the switch, |PRFilePrivate| and |_MDFileDesc|
 // need to be changed to match the definitions for WinNT.
 //-----------------------------------------------------------------------------
 typedef enum {
     _PR_TRI_TRUE = 1,
     _PR_TRI_FALSE = 0,
     _PR_TRI_UNKNOWN = -1
 } _PRTriStateBool;
 struct _MDFileDesc {
     PROsfd osfd;
 };
 struct PRFilePrivate {
     int32_t state;
     bool nonblocking;
     _PRTriStateBool inheritable;
     PRFileDesc *next;
     int lockCount;      /*   0: not locked
                          *  -1: a native lockfile call is in progress
                          * > 0: # times the file is locked */
     bool    appendMode;
     _MDFileDesc md;
 };
 //-----------------------------------------------------------------------------
 // Six static methods defined below (OpenFile,  FileTimeToPRTime, GetFileInfo,
 // OpenDir, CloseDir, ReadDir) should go away once the corresponding
 // UTF-16 APIs are implemented on all the supported platforms (or at least
 // Windows 9x/ME) in NSPR. Currently, they're only implemented on
 // Windows NT4 or later. (bug 330665)
 //-----------------------------------------------------------------------------
 // copied from nsprpub/pr/src/{io/prfile.c | md/windows/w95io.c} :
 // PR_Open and _PR_MD_OPEN
 nsresult
 OpenFile(const nsAFlatString &name, int osflags, int mode,
          PRFileDesc **fd)
 {
     int32_t access = 0;
     int32_t disposition = 0;
     int32_t attributes = 0;
     if (osflags & PR_SYNC)
         attributes = FILE_FLAG_WRITE_THROUGH;
     if (osflags & PR_RDONLY || osflags & PR_RDWR)
         access |= GENERIC_READ;
     if (osflags & PR_WRONLY || osflags & PR_RDWR)
         access |= GENERIC_WRITE;
     if ( osflags & PR_CREATE_FILE && osflags & PR_EXCL )
         disposition = CREATE_NEW;
     else if (osflags & PR_CREATE_FILE) {
         if (osflags & PR_TRUNCATE)
             disposition = CREATE_ALWAYS;
         else
             disposition = OPEN_ALWAYS;
     } else {
         if (osflags & PR_TRUNCATE)
             disposition = TRUNCATE_EXISTING;
         else
             disposition = OPEN_EXISTING;
     }
     if (osflags & nsIFile::DELETE_ON_CLOSE) {
         attributes |= FILE_FLAG_DELETE_ON_CLOSE;
     }
     if (osflags & nsIFile::OS_READAHEAD) {
         attributes |= FILE_FLAG_SEQUENTIAL_SCAN;
     }
     // If no write permissions are requested, and if we are possibly creating
     // the file, then set the new file as read only.
     // The flag has no effect if we happen to open the file.
     if (!(mode & (PR_IWUSR | PR_IWGRP | PR_IWOTH)) &&
         disposition != OPEN_EXISTING) {
         attributes |= FILE_ATTRIBUTE_READONLY;
     }
     HANDLE file = ::CreateFileW(name.get(), access,
                                 FILE_SHARE_READ|FILE_SHARE_WRITE,
                                 nullptr, disposition, attributes, nullptr);
     if (file == INVALID_HANDLE_VALUE) {
         *fd = nullptr;
         return ConvertWinError(GetLastError());
     }
     *fd = PR_ImportFile((PROsfd) file);
     if (*fd) {
         // On Windows, _PR_HAVE_O_APPEND is not defined so that we have to
         // add it manually. (see |PR_Open| in nsprpub/pr/src/io/prfile.c)
         (*fd)->secret->appendMode = (PR_APPEND & osflags) ? true : false;
         return NS_OK;
     }
     nsresult rv = NS_ErrorAccordingToNSPR();
     CloseHandle(file);
     return rv;
 }
 // copied from nsprpub/pr/src/{io/prfile.c | md/windows/w95io.c} :
 // PR_FileTimeToPRTime and _PR_FileTimeToPRTime
 static
 void FileTimeToPRTime(const FILETIME *filetime, PRTime *prtm)
 {
 #ifdef __GNUC__
     const PRTime _pr_filetime_offset = 116444736000000000LL;
 #else
     const PRTime _pr_filetime_offset = 116444736000000000i64;
 #endif
     PR_ASSERT(sizeof(FILETIME) == sizeof(PRTime));
     ::CopyMemory(prtm, filetime, sizeof(PRTime));
 #ifdef __GNUC__
     *prtm = (*prtm - _pr_filetime_offset) / 10LL;
 #else
     *prtm = (*prtm - _pr_filetime_offset) / 10i64;
 #endif
 }
 // copied from nsprpub/pr/src/{io/prfile.c | md/windows/w95io.c} with some
 // changes : PR_GetFileInfo64, _PR_MD_GETFILEINFO64
 static nsresult
 GetFileInfo(const nsAFlatString &name, PRFileInfo64 *info)
 {
     WIN32_FILE_ATTRIBUTE_DATA fileData;
     if (name.IsEmpty() || name.FindCharInSet(MOZ_UTF16("?*")) != kNotFound)
         return NS_ERROR_INVALID_ARG;
     if (!::GetFileAttributesExW(name.get(), GetFileExInfoStandard, &fileData))
         return ConvertWinError(GetLastError());
     if (fileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
         info->type = PR_FILE_DIRECTORY;
     } else {
         info->type = PR_FILE_FILE;
     }
     info->size = fileData.nFileSizeHigh;
     info->size = (info->size << 32) + fileData.nFileSizeLow;
     FileTimeToPRTime(&fileData.ftLastWriteTime, &info->modifyTime);
     if (0 == fileData.ftCreationTime.dwLowDateTime &&
 == fileData.ftCreationTime.dwHighDateTime) {
         info->creationTime = info->modifyTime;
     } else {
         FileTimeToPRTime(&fileData.ftCreationTime, &info->creationTime);
     }
     return NS_OK;
 }
 struct nsDir
 {
     HANDLE   handle;
     WIN32_FIND_DATAW data;
     bool     firstEntry;
 };
 static nsresult
 OpenDir(const nsAFlatString &name, nsDir * *dir)
 {
     if (NS_WARN_IF(!dir))
         return NS_ERROR_INVALID_ARG;
     *dir = nullptr;
     if (name.Length() + 3 >= MAX_PATH)
         return NS_ERROR_FILE_NAME_TOO_LONG;
     nsDir *d  = PR_NEW(nsDir);
     if (!d)
         return NS_ERROR_OUT_OF_MEMORY;
     nsAutoString filename(name);
      //If 'name' ends in a slash or backslash, do not append
      //another backslash.
     if (filename.Last() == L'/' || filename.Last() == L'\\')
         filename.Append('*');
     else
         filename.AppendLiteral("\\*");
     filename.ReplaceChar(L'/', L'\\');
     // FindFirstFileW Will have a last error of ERROR_DIRECTORY if
     // <file_path>\* is passed in.  If <unknown_path>\* is passed in then
     // ERROR_PATH_NOT_FOUND will be the last error.
     d->handle = ::FindFirstFileW(filename.get(), &(d->data) );
     if (d->handle == INVALID_HANDLE_VALUE) {
         PR_Free(d);
         return ConvertWinError(GetLastError());
     }
     d->firstEntry = true;
     *dir = d;
     return NS_OK;
 }
 static nsresult
 ReadDir(nsDir *dir, PRDirFlags flags, nsString& name)
 {
     name.Truncate();
     if (NS_WARN_IF(!dir))
         return NS_ERROR_INVALID_ARG;
     while (1) {
         BOOL rv;
         if (dir->firstEntry)
         {
             dir->firstEntry = false;
             rv = 1;
         } else
             rv = ::FindNextFileW(dir->handle, &(dir->data));
         if (rv == 0)
             break;
         const wchar_t *fileName;
         nsString tmp;
         fileName = (dir)->data.cFileName;
         if ((flags & PR_SKIP_DOT) &&
             (fileName[0] == L'.') && (fileName[1] == L'\0'))
             continue;
         if ((flags & PR_SKIP_DOT_DOT) &&
             (fileName[0] == L'.') && (fileName[1] == L'.') &&
             (fileName[2] == L'\0'))
             continue;
         DWORD attrib =  dir->data.dwFileAttributes;
         if ((flags & PR_SKIP_HIDDEN) && (attrib & FILE_ATTRIBUTE_HIDDEN))
             continue;
         if (fileName == tmp.get())
             name = tmp;
         else
             name = fileName;
         return NS_OK;
     }
     DWORD err = GetLastError();
     return err == ERROR_NO_MORE_FILES ? NS_OK : ConvertWinError(err);
 }
 static nsresult
 CloseDir(nsDir *&d)
 {
     if (NS_WARN_IF(!d))
         return NS_ERROR_INVALID_ARG;
     BOOL isOk = FindClose(d->handle);
     // PR_DELETE also nulls out the passed in pointer.
     PR_DELETE(d);
     return isOk ? NS_OK : ConvertWinError(GetLastError());
 }
 //-----------------------------------------------------------------------------
 // nsDirEnumerator
 //-----------------------------------------------------------------------------
 class nsDirEnumerator MOZ_FINAL : public nsISimpleEnumerator,
                                   public nsIDirectoryEnumerator
 {
     public:
         NS_DECL_ISUPPORTS
         nsDirEnumerator() : mDir(nullptr)
         {
         }
         nsresult Init(nsIFile* parent)
         {
             nsAutoString filepath;
             parent->GetTarget(filepath);
             if (filepath.IsEmpty())
             {
                 parent->GetPath(filepath);
             }
             if (filepath.IsEmpty())
             {
                 return NS_ERROR_UNEXPECTED;
             }
             // IsDirectory is not needed here because OpenDir will return
             // NS_ERROR_FILE_NOT_DIRECTORY if the passed in path is a file.
             nsresult rv = OpenDir(filepath, &mDir);
             if (NS_FAILED(rv))
                 return rv;
             mParent = parent;
             return NS_OK;
         }
         NS_IMETHOD HasMoreElements(bool *result)
         {
             nsresult rv;
             if (mNext == nullptr && mDir)
             {
                 nsString name;
                 rv = ReadDir(mDir, PR_SKIP_BOTH, name);
                 if (NS_FAILED(rv))
                     return rv;
                 if (name.IsEmpty())
                 {
                     // end of dir entries
                     if (NS_FAILED(CloseDir(mDir)))
                         return NS_ERROR_FAILURE;
                     *result = false;
                     return NS_OK;
                 }
                 nsCOMPtr<nsIFile> file;
                 rv = mParent->Clone(getter_AddRefs(file));
                 if (NS_FAILED(rv))
                     return rv;
                 rv = file->Append(name);
                 if (NS_FAILED(rv))
                     return rv;
                 mNext = do_QueryInterface(file);
             }
             *result = mNext != nullptr;
             if (!*result)
                 Close();
             return NS_OK;
         }
         NS_IMETHOD GetNext(nsISupports **result)
         {
             nsresult rv;
             bool hasMore;
             rv = HasMoreElements(&hasMore);
             if (NS_FAILED(rv)) return rv;
             *result = mNext;        // might return nullptr
             NS_IF_ADDREF(*result);
             mNext = nullptr;
             return NS_OK;
         }
         NS_IMETHOD GetNextFile(nsIFile **result)
         {
             *result = nullptr;
             bool hasMore = false;
             nsresult rv = HasMoreElements(&hasMore);
             if (NS_FAILED(rv) || !hasMore)
                 return rv;
             *result = mNext;
             NS_IF_ADDREF(*result);
             mNext = nullptr;
             return NS_OK;
         }
         NS_IMETHOD Close()
         {
             if (mDir)
             {
                 nsresult rv = CloseDir(mDir);
                 NS_ASSERTION(NS_SUCCEEDED(rv), "close failed");
                 if (NS_FAILED(rv))
                     return NS_ERROR_FAILURE;
             }
             return NS_OK;
         }
         // dtor can be non-virtual since there are no subclasses, but must be
         // public to use the class on the stack.
         ~nsDirEnumerator()
         {
             Close();
         }
     protected:
         nsDir*             mDir;
         nsCOMPtr<nsIFile>  mParent;
         nsCOMPtr<nsIFile>  mNext;
 };
 NS_IMPL_ISUPPORTS(nsDirEnumerator, nsISimpleEnumerator, nsIDirectoryEnumerator)
 //-----------------------------------------------------------------------------
 // nsLocalFile <public>
 //-----------------------------------------------------------------------------
 nsLocalFile::nsLocalFile()
   : mDirty(true)
   , mResolveDirty(true)
   , mFollowSymlinks(false)
 {
 }
 nsresult
 nsLocalFile::nsLocalFileConstructor(nsISupports* outer, const nsIID& aIID, void* *aInstancePtr)
 {
     if (NS_WARN_IF(!aInstancePtr))
         return NS_ERROR_INVALID_ARG;
     if (NS_WARN_IF(outer))
         return NS_ERROR_NO_AGGREGATION;
     nsLocalFile* inst = new nsLocalFile();
     if (inst == nullptr)
         return NS_ERROR_OUT_OF_MEMORY;
     nsresult rv = inst->QueryInterface(aIID, aInstancePtr);
     if (NS_FAILED(rv))
     {
         delete inst;
         return rv;
     }
     return NS_OK;
 }
 //-----------------------------------------------------------------------------
 // nsLocalFile::nsISupports
 //-----------------------------------------------------------------------------
 NS_IMPL_ISUPPORTS(nsLocalFile,
                   nsILocalFile,
                   nsIFile,
                   nsILocalFileWin,
                   nsIHashable)
 //-----------------------------------------------------------------------------
 // nsLocalFile <private>
 //-----------------------------------------------------------------------------
 nsLocalFile::nsLocalFile(const nsLocalFile& other)
   : mDirty(true)
   , mResolveDirty(true)
   , mFollowSymlinks(other.mFollowSymlinks)
   , mWorkingPath(other.mWorkingPath)
 {
 }
 // Resolve the shortcut file from mWorkingPath and write the path
 // it points to into mResolvedPath.
 nsresult
 nsLocalFile::ResolveShortcut()
 {
     // we can't do anything without the resolver
     if (!gResolver)
         return NS_ERROR_FAILURE;
     mResolvedPath.SetLength(MAX_PATH);
     if (mResolvedPath.Length() != MAX_PATH)
         return NS_ERROR_OUT_OF_MEMORY;
     wchar_t *resolvedPath = wwc(mResolvedPath.BeginWriting());
     // resolve this shortcut
     nsresult rv = gResolver->Resolve(mWorkingPath.get(), resolvedPath);
     size_t len = NS_FAILED(rv) ? 0 : wcslen(resolvedPath);
     mResolvedPath.SetLength(len);
     return rv;
 }
 // Resolve any shortcuts and stat the resolved path. After a successful return
 // the path is guaranteed valid and the members of mFileInfo64 can be used.
 nsresult
 nsLocalFile::ResolveAndStat()
 {
     // if we aren't dirty then we are already done
     if (!mDirty)
         return NS_OK;
     // we can't resolve/stat anything that isn't a valid NSPR addressable path
     if (mWorkingPath.IsEmpty())
         return NS_ERROR_FILE_INVALID_PATH;
     // this is usually correct
     mResolvedPath.Assign(mWorkingPath);
     // slutty hack designed to work around bug 134796 until it is fixed
     nsAutoString nsprPath(mWorkingPath.get());
     if (mWorkingPath.Length() == 2 && mWorkingPath.CharAt(1) == L':')
         nsprPath.Append('\\');
     // first we will see if the working path exists. If it doesn't then
     // there is nothing more that can be done
     nsresult rv = GetFileInfo(nsprPath, &mFileInfo64);
     if (NS_FAILED(rv))
         return rv;
     // if this isn't a shortcut file or we aren't following symlinks then we're done
     if (!mFollowSymlinks
         || mFileInfo64.type != PR_FILE_FILE
         || !IsShortcutPath(mWorkingPath))
     {
         mDirty = false;
         mResolveDirty = false;
         return NS_OK;
     }
     // we need to resolve this shortcut to what it points to, this will
     // set mResolvedPath. Even if it fails we need to have the resolved
     // path equal to working path for those functions that always use
     // the resolved path.
     rv = ResolveShortcut();
     if (NS_FAILED(rv))
     {
         mResolvedPath.Assign(mWorkingPath);
         return rv;
     }
     mResolveDirty = false;
     // get the details of the resolved path
     rv = GetFileInfo(mResolvedPath, &mFileInfo64);
     if (NS_FAILED(rv))
         return rv;
     mDirty = false;
     return NS_OK;
 }
 /**
  * Fills the mResolvedPath member variable with the file or symlink target
  * if follow symlinks is on.  This is a copy of the Resolve parts from
  * ResolveAndStat. ResolveAndStat is much slower though because of the stat.
  *
  * @return NS_OK on success.
 */
 nsresult
 nsLocalFile::Resolve()
 {
   // if we aren't dirty then we are already done
   if (!mResolveDirty) {
     return NS_OK;
   }
   // we can't resolve/stat anything that isn't a valid NSPR addressable path
   if (mWorkingPath.IsEmpty()) {
     return NS_ERROR_FILE_INVALID_PATH;
   }
   // this is usually correct
   mResolvedPath.Assign(mWorkingPath);
   // if this isn't a shortcut file or we aren't following symlinks then
   // we're done.
   if (!mFollowSymlinks ||
       !IsShortcutPath(mWorkingPath)) {
     mResolveDirty = false;
     return NS_OK;
   }
   // we need to resolve this shortcut to what it points to, this will
   // set mResolvedPath. Even if it fails we need to have the resolved
   // path equal to working path for those functions that always use
   // the resolved path.
   nsresult rv = ResolveShortcut();
   if (NS_FAILED(rv)) {
     mResolvedPath.Assign(mWorkingPath);
     return rv;
   }
   mResolveDirty = false;
   return NS_OK;
 }
 //-----------------------------------------------------------------------------
 // nsLocalFile::nsIFile,nsILocalFile
 //-----------------------------------------------------------------------------
 NS_IMETHODIMP
 nsLocalFile::Clone(nsIFile **file)
 {
     // Just copy-construct ourselves
     *file = new nsLocalFile(*this);
     if (!*file)
       return NS_ERROR_OUT_OF_MEMORY;
     NS_ADDREF(*file);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::InitWithFile(nsIFile *aFile)
 {
     if (NS_WARN_IF(!aFile))
         return NS_ERROR_INVALID_ARG;
     nsAutoString path;
     aFile->GetPath(path);
     if (path.IsEmpty())
         return NS_ERROR_INVALID_ARG;
     return InitWithPath(path);
 }
 NS_IMETHODIMP
 nsLocalFile::InitWithPath(const nsAString &filePath)
 {
     MakeDirty();
     nsAString::const_iterator begin, end;
     filePath.BeginReading(begin);
     filePath.EndReading(end);
     // input string must not be empty
     if (begin == end)
         return NS_ERROR_FAILURE;
     char16_t firstChar = *begin;
     char16_t secondChar = *(++begin);
     // just do a sanity check.  if it has any forward slashes, it is not a Native path
     // on windows.  Also, it must have a colon at after the first char.
     if (FindCharInReadable(L'/', begin, end))
         return NS_ERROR_FILE_UNRECOGNIZED_PATH;
     if (secondChar != L':' && (secondChar != L'\\' || firstChar != L'\\'))
         return NS_ERROR_FILE_UNRECOGNIZED_PATH;
     if (secondChar == L':') {
         // Make sure we have a valid drive, later code assumes the drive letter
         // is a single char a-z or A-Z.
         if (PathGetDriveNumberW(filePath.Data()) == -1) {
             return NS_ERROR_FILE_UNRECOGNIZED_PATH;
         }
     }
     mWorkingPath = filePath;
     // kill any trailing '\'
     if (mWorkingPath.Last() == L'\\')
         mWorkingPath.Truncate(mWorkingPath.Length() - 1);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::OpenNSPRFileDesc(int32_t flags, int32_t mode, PRFileDesc **_retval)
 {
     nsresult rv = Resolve();
     if (NS_FAILED(rv))
         return rv;
     return OpenFile(mResolvedPath, flags, mode, _retval);
 }
 NS_IMETHODIMP
 nsLocalFile::OpenANSIFileDesc(const char *mode, FILE * *_retval)
 {
     nsresult rv = ResolveAndStat();
     if (NS_FAILED(rv) && rv != NS_ERROR_FILE_NOT_FOUND)
         return rv;
     *_retval = _wfopen(mResolvedPath.get(), NS_ConvertASCIItoUTF16(mode).get());
     if (*_retval)
         return NS_OK;
     return NS_ERROR_FAILURE;
 }
 NS_IMETHODIMP
 nsLocalFile::Create(uint32_t type, uint32_t attributes)
 {
     if (type != NORMAL_FILE_TYPE && type != DIRECTORY_TYPE)
         return NS_ERROR_FILE_UNKNOWN_TYPE;
     nsresult rv = ResolveAndStat();
     if (NS_FAILED(rv) && rv != NS_ERROR_FILE_NOT_FOUND)
         return rv;
     // create directories to target
     //
     // A given local file can be either one of these forms:
     //
     //   - normal:    X:\some\path\on\this\drive
     //                       ^--- start here
     //
     //   - UNC path:  \\machine\volume\some\path\on\this\drive
     //                                     ^--- start here
     //
     // Skip the first 'X:\' for the first form, and skip the first full
     // '\\machine\volume\' segment for the second form.
     wchar_t* path = wwc(mResolvedPath.BeginWriting());
     if (path[0] == L'\\' && path[1] == L'\\')
     {
         // dealing with a UNC path here; skip past '\\machine\'
         path = wcschr(path + 2, L'\\');
         if (!path)
             return NS_ERROR_FILE_INVALID_PATH;
         ++path;
     }
     // search for first slash after the drive (or volume) name
     wchar_t* slash = wcschr(path, L'\\');
     nsresult directoryCreateError = NS_OK;
     if (slash)
     {
         // skip the first '\\'
         ++slash;
         slash = wcschr(slash, L'\\');
         while (slash)
         {
             *slash = L'\0';
             if (!::CreateDirectoryW(mResolvedPath.get(), nullptr)) {
                 rv = ConvertWinError(GetLastError());
                 if (NS_ERROR_FILE_NOT_FOUND == rv &&
                     NS_ERROR_FILE_ACCESS_DENIED == directoryCreateError) {
                     // If a previous CreateDirectory failed due to access, return that.
                     return NS_ERROR_FILE_ACCESS_DENIED;
                 }
                 // perhaps the base path already exists, or perhaps we don't have
                 // permissions to create the directory.  NOTE: access denied could
                 // occur on a parent directory even though it exists.
                 else if (NS_ERROR_FILE_ALREADY_EXISTS != rv &&
                          NS_ERROR_FILE_ACCESS_DENIED != rv) {
                     return rv;
                 }
                 directoryCreateError = rv;
             }
             *slash = L'\\';
             ++slash;
             slash = wcschr(slash, L'\\');
         }
     }
     if (type == NORMAL_FILE_TYPE)
     {
         PRFileDesc* file;
         rv = OpenFile(mResolvedPath,
                       PR_RDONLY | PR_CREATE_FILE | PR_APPEND | PR_EXCL, attributes,
                       &file);
         if (file)
             PR_Close(file);
         if (rv == NS_ERROR_FILE_ACCESS_DENIED)
         {
             // need to return already-exists for directories (bug 452217)
             bool isdir;
             if (NS_SUCCEEDED(IsDirectory(&isdir)) && isdir)
                 rv = NS_ERROR_FILE_ALREADY_EXISTS;
         } else if (NS_ERROR_FILE_NOT_FOUND == rv &&
                    NS_ERROR_FILE_ACCESS_DENIED == directoryCreateError) {
             // If a previous CreateDirectory failed due to access, return that.
             return NS_ERROR_FILE_ACCESS_DENIED;
         }
         return rv;
     }
     if (type == DIRECTORY_TYPE)
     {
         if (!::CreateDirectoryW(mResolvedPath.get(), nullptr)) {
           rv = ConvertWinError(GetLastError());
           if (NS_ERROR_FILE_NOT_FOUND == rv &&
               NS_ERROR_FILE_ACCESS_DENIED == directoryCreateError) {
               // If a previous CreateDirectory failed due to access, return that.
               return NS_ERROR_FILE_ACCESS_DENIED;
           } else {
               return rv;
           }
         }
         else
             return NS_OK;
     }
     return NS_ERROR_FILE_UNKNOWN_TYPE;
 }
 NS_IMETHODIMP
 nsLocalFile::Append(const nsAString &node)
 {
     // append this path, multiple components are not permitted
     return AppendInternal(PromiseFlatString(node), false);
 }
 NS_IMETHODIMP
 nsLocalFile::AppendRelativePath(const nsAString &node)
 {
     // append this path, multiple components are permitted
     return AppendInternal(PromiseFlatString(node), true);
 }
 nsresult
 nsLocalFile::AppendInternal(const nsAFlatString &node, bool multipleComponents)
 {
     if (node.IsEmpty())
         return NS_OK;
     // check the relative path for validity
     if (node.First() == L'\\'                                   // can't start with an '\'
         || node.FindChar(L'/') != kNotFound                     // can't contain /
         || node.EqualsASCII(".."))                              // can't be ..
         return NS_ERROR_FILE_UNRECOGNIZED_PATH;
     if (multipleComponents)
     {
         // can't contain .. as a path component. Ensure that the valid components
         // "foo..foo", "..foo", and "foo.." are not falsely detected,
         // but the invalid paths "..\", "foo\..", "foo\..\foo",
         // "..\foo", etc are.
         NS_NAMED_LITERAL_STRING(doubleDot, "\\..");
         nsAString::const_iterator start, end, offset;
         node.BeginReading(start);
         node.EndReading(end);
         offset = end;
         while (FindInReadable(doubleDot, start, offset))
         {
             if (offset == end || *offset == L'\\')
                 return NS_ERROR_FILE_UNRECOGNIZED_PATH;
             start = offset;
             offset = end;
         }
         // catches the remaining cases of prefixes
         if (StringBeginsWith(node, NS_LITERAL_STRING("..\\")))
             return NS_ERROR_FILE_UNRECOGNIZED_PATH;
     }
     // single components can't contain '\'
     else if (node.FindChar(L'\\') != kNotFound)
         return NS_ERROR_FILE_UNRECOGNIZED_PATH;
     MakeDirty();
     mWorkingPath.Append(NS_LITERAL_STRING("\\") + node);
     return NS_OK;
 }
 #define TOUPPER(u) (((u) >= L'a' && (u) <= L'z') ? \
                     (u) - (L'a' - L'A') : (u))
 NS_IMETHODIMP
 nsLocalFile::Normalize()
 {
     // XXX See bug 187957 comment 18 for possible problems with this implementation.
     if (mWorkingPath.IsEmpty())
         return NS_OK;
     nsAutoString path(mWorkingPath);
     // find the index of the root backslash for the path. Everything before
     // this is considered fully normalized and cannot be ascended beyond
     // using ".."  For a local drive this is the first slash (e.g. "c:\").
     // For a UNC path it is the slash following the share name
     // (e.g. "\\server\share\").
     int32_t rootIdx = 2;        // default to local drive
     if (path.First() == L'\\')   // if a share then calculate the rootIdx
     {
         rootIdx = path.FindChar(L'\\', 2);   // skip \\ in front of the server
         if (rootIdx == kNotFound)
             return NS_OK;                   // already normalized
         rootIdx = path.FindChar(L'\\', rootIdx+1);
         if (rootIdx == kNotFound)
             return NS_OK;                   // already normalized
     }
     else if (path.CharAt(rootIdx) != L'\\')
     {
         // The path has been specified relative to the current working directory
         // for that drive. To normalize it, the current working directory for
         // that drive needs to be inserted before the supplied relative path
         // which will provide an absolute path (and the rootIdx will still be 2).
         WCHAR cwd[MAX_PATH];
         WCHAR * pcwd = cwd;
         int drive = TOUPPER(path.First()) - 'A' + 1;
         /* We need to worry about IPH, for details read bug 419326.
          * _getdrives - http://msdn2.microsoft.com/en-us/library/xdhk0xd2.aspx
          * uses a bitmask, bit 0 is 'a:'
          * _chdrive - http://msdn2.microsoft.com/en-us/library/0d1409hb.aspx
          * _getdcwd - http://msdn2.microsoft.com/en-us/library/7t2zk3s4.aspx
          * take an int, 1 is 'a:'.
          *
          * Because of this, we need to do some math. Subtract 1 to convert from
          * _chdrive/_getdcwd format to _getdrives drive numbering.
          * Shift left x bits to convert from integer indexing to bitfield indexing.
          * And of course, we need to find out if the drive is in the bitmask.
          *
          * If we're really unlucky, we can still lose, but only if the user
          * manages to eject the drive between our call to _getdrives() and
          * our *calls* to _wgetdcwd.
          */
         if (!((1 << (drive - 1)) & _getdrives()))
             return NS_ERROR_FILE_INVALID_PATH;
         if (!_wgetdcwd(drive, pcwd, MAX_PATH))
             pcwd = _wgetdcwd(drive, 0, 0);
         if (!pcwd)
             return NS_ERROR_OUT_OF_MEMORY;
         nsAutoString currentDir(pcwd);
         if (pcwd != cwd)
             free(pcwd);
         if (currentDir.Last() == '\\')
             path.Replace(0, 2, currentDir);
         else
             path.Replace(0, 2, currentDir + NS_LITERAL_STRING("\\"));
     }
     NS_POSTCONDITION(0 < rootIdx && rootIdx < (int32_t)path.Length(), "rootIdx is invalid");
     NS_POSTCONDITION(path.CharAt(rootIdx) == '\\', "rootIdx is invalid");
     // if there is nothing following the root path then it is already normalized
     if (rootIdx + 1 == (int32_t)path.Length())
         return NS_OK;
     // assign the root
     const char16_t * pathBuffer = path.get();  // simplify access to the buffer
     mWorkingPath.SetCapacity(path.Length()); // it won't ever grow longer
     mWorkingPath.Assign(pathBuffer, rootIdx);
     // Normalize the path components. The actions taken are:
     //
     //  "\\"    condense to single backslash
     //  "."     remove from path
     //  ".."    up a directory
     //  "..."   remove from path (any number of dots > 2)
     //
     // The last form is something that Windows 95 and 98 supported and
     // is a shortcut for changing up multiple directories. Windows XP
     // and ilk ignore it in a path, as is done here.
     int32_t len, begin, end = rootIdx;
     while (end < (int32_t)path.Length())
     {
         // find the current segment (text between the backslashes) to
         // be examined, this will set the following variables:
         //  begin == index of first char in segment
         //  end   == index 1 char after last char in segment
         //  len   == length of segment
         begin = end + 1;
         end = path.FindChar('\\', begin);
         if (end == kNotFound)
             end = path.Length();
         len = end - begin;
         // ignore double backslashes
         if (len == 0)
             continue;
         // len != 0, and interesting paths always begin with a dot
         if (pathBuffer[begin] == '.')
         {
             // ignore single dots
             if (len == 1)
                 continue;
             // handle multiple dots
             if (len >= 2 && pathBuffer[begin+1] == L'.')
             {
                 // back up a path component on double dot
                 if (len == 2)
                 {
                     int32_t prev = mWorkingPath.RFindChar('\\');
                     if (prev >= rootIdx)
                         mWorkingPath.Truncate(prev);
                     continue;
                 }
                 // length is > 2 and the first two characters are dots.
                 // if the rest of the string is dots, then ignore it.
                 int idx = len - 1;
                 for (; idx >= 2; --idx)
                 {
                     if (pathBuffer[begin+idx] != L'.')
                         break;
                 }
                 // this is true if the loop above didn't break
                 // and all characters in this segment are dots.
                 if (idx < 2)
                     continue;
             }
         }
         // add the current component to the path, including the preceding backslash
         mWorkingPath.Append(pathBuffer + begin - 1, len + 1);
     }
     // kill trailing dots and spaces.
     int32_t filePathLen = mWorkingPath.Length() - 1;
     while(filePathLen > 0 && (mWorkingPath[filePathLen] == L' ' ||
           mWorkingPath[filePathLen] == L'.'))
     {
         mWorkingPath.Truncate(filePathLen--);
     }
     MakeDirty();
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::GetLeafName(nsAString &aLeafName)
 {
     aLeafName.Truncate();
     if (mWorkingPath.IsEmpty())
         return NS_ERROR_FILE_UNRECOGNIZED_PATH;
     int32_t offset = mWorkingPath.RFindChar(L'\\');
     // if the working path is just a node without any lashes.
     if (offset == kNotFound)
         aLeafName = mWorkingPath;
     else
         aLeafName = Substring(mWorkingPath, offset + 1);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::SetLeafName(const nsAString &aLeafName)
 {
     MakeDirty();
     if (mWorkingPath.IsEmpty())
         return NS_ERROR_FILE_UNRECOGNIZED_PATH;
     // cannot use nsCString::RFindChar() due to 0x5c problem
     int32_t offset = mWorkingPath.RFindChar(L'\\');
     if (offset)
     {
         mWorkingPath.Truncate(offset+1);
     }
     mWorkingPath.Append(aLeafName);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::GetPath(nsAString &_retval)
 {
     _retval = mWorkingPath;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::GetCanonicalPath(nsAString &aResult)
 {
     EnsureShortPath();
     aResult.Assign(mShortWorkingPath);
     return NS_OK;
 }
 typedef struct {
     WORD wLanguage;
     WORD wCodePage;
 } LANGANDCODEPAGE;
 NS_IMETHODIMP
 nsLocalFile::GetVersionInfoField(const char* aField, nsAString& _retval)
 {
     nsresult rv = ResolveAndStat();
     if (NS_FAILED(rv))
         return rv;
     rv = NS_ERROR_FAILURE;
     const WCHAR *path = mFollowSymlinks ? mResolvedPath.get() : mWorkingPath.get();
     DWORD dummy;
     DWORD size = ::GetFileVersionInfoSizeW(path, &dummy);
     if (!size)
         return rv;
     void* ver = calloc(size, 1);
     if (!ver)
         return NS_ERROR_OUT_OF_MEMORY;
     if (::GetFileVersionInfoW(path, 0, size, ver))
     {
         LANGANDCODEPAGE* translate = nullptr;
         UINT pageCount;
         BOOL queryResult = ::VerQueryValueW(ver, L"\\VarFileInfo\\Translation",
                                             (void**)&translate, &pageCount);
         if (queryResult && translate)
         {
             for (int32_t i = 0; i < 2; ++i)
             {
                 wchar_t subBlock[MAX_PATH];
                 _snwprintf(subBlock, MAX_PATH,
                            L"\\StringFileInfo\\%04x%04x\\%s",
                            (i == 0 ? translate[0].wLanguage
                                    : ::GetUserDefaultLangID()),
                            translate[0].wCodePage,
                            NS_ConvertASCIItoUTF16(
                                nsDependentCString(aField)).get());
                 subBlock[MAX_PATH - 1] = 0;
                 LPVOID value = nullptr;
                 UINT size;
                 queryResult = ::VerQueryValueW(ver, subBlock, &value, &size);
                 if (queryResult && value)
                 {
                     _retval.Assign(static_cast<char16_t*>(value));
                     if (!_retval.IsEmpty())
                     {
                         rv = NS_OK;
                         break;
                     }
                 }
             }
         }
     }
     free(ver);
     return rv;
 }
 NS_IMETHODIMP
 nsLocalFile::SetShortcut(nsIFile* targetFile,
                          nsIFile* workingDir,
                          const char16_t* args,
                          const char16_t* description,
                          nsIFile* iconFile,
                          int32_t iconIndex)
 {
     bool exists;
     nsresult rv = this->Exists(&exists);
     if (NS_FAILED(rv)) {
       return rv;
     }
     const WCHAR* targetFilePath = nullptr;
     const WCHAR* workingDirPath = nullptr;
     const WCHAR* iconFilePath = nullptr;
     nsAutoString targetFilePathAuto;
     if (targetFile) {
         rv = targetFile->GetPath(targetFilePathAuto);
         if (NS_FAILED(rv)) {
           return rv;
         }
         targetFilePath = targetFilePathAuto.get();
     }
     nsAutoString workingDirPathAuto;
     if (workingDir) {
         rv = workingDir->GetPath(workingDirPathAuto);
         if (NS_FAILED(rv)) {
           return rv;
         }
         workingDirPath = workingDirPathAuto.get();
     }
     nsAutoString iconPathAuto;
     if (iconFile) {
         rv = iconFile->GetPath(iconPathAuto);
         if (NS_FAILED(rv)) {
           return rv;
         }
         iconFilePath = iconPathAuto.get();
     }
     rv = gResolver->SetShortcut(exists,
                                 mWorkingPath.get(),
                                 targetFilePath,
                                 workingDirPath,
                                 char16ptr_t(args),
                                 char16ptr_t(description),
                                 iconFilePath,
                                 iconFilePath? iconIndex : 0);
     if (targetFilePath && NS_SUCCEEDED(rv)) {
       MakeDirty();
     }
     return rv;
 }
 /**
  * Determines if the drive type for the specified file is rmeote or local.
  *
  * @param path   The path of the file to check
  * @param remote Out parameter, on function success holds true if the specified
  *               file path is remote, or false if the file path is local.
  * @return true  on success. The return value implies absolutely nothing about
  *               wether the file is local or remote.
 */
 static bool
 IsRemoteFilePath(LPCWSTR path, bool &remote)
 {
   // Obtain the parent directory path and make sure it ends with
   // a trailing backslash.
   WCHAR dirPath[MAX_PATH + 1] = { 0 };
   wcsncpy(dirPath, path, MAX_PATH);
   if (!PathRemoveFileSpecW(dirPath)) {
     return false;
   }
   size_t len = wcslen(dirPath);
   // In case the dirPath holds exaclty MAX_PATH and remains unchanged, we
   // recheck the required length here since we need to terminate it with
   // a backslash.
   if (len >= MAX_PATH) {
     return false;
   }
   dirPath[len] = L'\\';
   dirPath[len + 1] = L'\0';
   UINT driveType = GetDriveTypeW(dirPath);
   remote = driveType == DRIVE_REMOTE;
   return true;
 }
 nsresult
 nsLocalFile::CopySingleFile(nsIFile *sourceFile, nsIFile *destParent,
                             const nsAString &newName, uint32_t options)
 {
     nsresult rv = NS_OK;
     nsAutoString filePath;
     bool move = options & (Move | Rename);
     // get the path that we are going to copy to.
     // Since windows does not know how to auto
     // resolve shortcuts, we must work with the
     // target.
     nsAutoString destPath;
     destParent->GetTarget(destPath);
     destPath.Append('\\');
     if (newName.IsEmpty())
     {
         nsAutoString aFileName;
         sourceFile->GetLeafName(aFileName);
         destPath.Append(aFileName);
     }
     else
     {
         destPath.Append(newName);
     }
     if (options & FollowSymlinks)
     {
         rv = sourceFile->GetTarget(filePath);
         if (filePath.IsEmpty())
             rv = sourceFile->GetPath(filePath);
     }
     else
     {
         rv = sourceFile->GetPath(filePath);
     }
     if (NS_FAILED(rv))
         return rv;
     // Pass the flag COPY_FILE_NO_BUFFERING to CopyFileEx as we may be copying
     // to a SMBV2 remote drive. Without this parameter subsequent append mode
     // file writes can cause the resultant file to become corrupt. We only need to do
     // this if the major version of Windows is > 5(Only Windows Vista and above
     // can support SMBV2).  With a 7200RPM hard drive:
     // Copying a 1KB file with COPY_FILE_NO_BUFFERING takes about 30-60ms.
     // Copying a 1KB file without COPY_FILE_NO_BUFFERING takes < 1ms.
     // So we only use COPY_FILE_NO_BUFFERING when we have a remote drive.
     int copyOK;
     DWORD dwCopyFlags = COPY_FILE_ALLOW_DECRYPTED_DESTINATION;
     if (IsVistaOrLater()) {
         bool path1Remote, path2Remote;
         if (!IsRemoteFilePath(filePath.get(), path1Remote) ||
             !IsRemoteFilePath(destPath.get(), path2Remote) ||
             path1Remote || path2Remote) {
             dwCopyFlags |= COPY_FILE_NO_BUFFERING;
         }
     }
     if (!move)
     {
         copyOK = ::CopyFileExW(filePath.get(), destPath.get(), nullptr,
                                nullptr, nullptr, dwCopyFlags);
     }
     else
     {
         copyOK = ::MoveFileExW(filePath.get(), destPath.get(), MOVEFILE_REPLACE_EXISTING);
         // Check if copying the source file to a different volume,
         // as this could be an SMBV2 mapped drive.
         if (!copyOK && GetLastError() == ERROR_NOT_SAME_DEVICE)
         {
             if (options & Rename) {
                 return NS_ERROR_FILE_ACCESS_DENIED;
             }
             copyOK = CopyFileExW(filePath.get(), destPath.get(), nullptr,
                                  nullptr, nullptr, dwCopyFlags);
             if (copyOK)
                 DeleteFileW(filePath.get());
         }
     }
     if (!copyOK)  // CopyFileEx and MoveFileEx return zero at failure.
         rv = ConvertWinError(GetLastError());
     else if (move && !(options & SkipNtfsAclReset))
     {
         // Set security permissions to inherit from parent.
         // Note: propagates to all children: slow for big file trees
         PACL pOldDACL = nullptr;
         PSECURITY_DESCRIPTOR pSD = nullptr;
         ::GetNamedSecurityInfoW((LPWSTR)destPath.get(), SE_FILE_OBJECT,
                                 DACL_SECURITY_INFORMATION,
                                 nullptr, nullptr, &pOldDACL, nullptr, &pSD);
         if (pOldDACL)
             ::SetNamedSecurityInfoW((LPWSTR)destPath.get(), SE_FILE_OBJECT,
                                     DACL_SECURITY_INFORMATION |
                                     UNPROTECTED_DACL_SECURITY_INFORMATION,
                                     nullptr, nullptr, pOldDACL, nullptr);
         if (pSD)
             LocalFree((HLOCAL)pSD);
     }
     return rv;
 }
 nsresult
 nsLocalFile::CopyMove(nsIFile *aParentDir, const nsAString &newName, uint32_t options)
 {
     bool move = options & (Move | Rename);
     bool followSymlinks = options & FollowSymlinks;
     nsCOMPtr<nsIFile> newParentDir = aParentDir;
     // check to see if this exists, otherwise return an error.
     // we will check this by resolving.  If the user wants us
     // to follow links, then we are talking about the target,
     // hence we can use the |FollowSymlinks| option.
     nsresult rv  = ResolveAndStat();
     if (NS_FAILED(rv))
         return rv;
     if (!newParentDir)
     {
         // no parent was specified.  We must rename.
         if (newName.IsEmpty())
             return NS_ERROR_INVALID_ARG;
         rv = GetParent(getter_AddRefs(newParentDir));
         if (NS_FAILED(rv))
             return rv;
     }
     if (!newParentDir)
         return NS_ERROR_FILE_DESTINATION_NOT_DIR;
     // make sure it exists and is a directory.  Create it if not there.
     bool exists;
     newParentDir->Exists(&exists);
     if (!exists)
     {
         rv = newParentDir->Create(DIRECTORY_TYPE, 0644);  // TODO, what permissions should we use
         if (NS_FAILED(rv))
             return rv;
     }
     else
     {
         bool isDir;
         newParentDir->IsDirectory(&isDir);
         if (!isDir)
         {
             if (followSymlinks)
             {
                 bool isLink;
                 newParentDir->IsSymlink(&isLink);
                 if (isLink)
                 {
                     nsAutoString target;
                     newParentDir->GetTarget(target);
                     nsCOMPtr<nsIFile> realDest = new nsLocalFile();
                     if (realDest == nullptr)
                         return NS_ERROR_OUT_OF_MEMORY;
                     rv = realDest->InitWithPath(target);
                     if (NS_FAILED(rv))
                         return rv;
                     return CopyMove(realDest, newName, options);
                 }
             }
             else
             {
                 return NS_ERROR_FILE_DESTINATION_NOT_DIR;
             }
         }
     }
     // Try different ways to move/copy files/directories
     bool done = false;
     bool isDir;
     IsDirectory(&isDir);
     bool isSymlink;
     IsSymlink(&isSymlink);
     // Try to move the file or directory, or try to copy a single file (or non-followed symlink)
     if (move || !isDir || (isSymlink && !followSymlinks))
     {
         // Copy/Move single file, or move a directory
         if (!aParentDir) {
             options |= SkipNtfsAclReset;
         }
         rv = CopySingleFile(this, newParentDir, newName, options);
         done = NS_SUCCEEDED(rv);
         // If we are moving a directory and that fails, fallback on directory
         // enumeration.  See bug 231300 for details.
         if (!done && !(move && isDir))
             return rv;
     }
     // Not able to copy or move directly, so enumerate it
     if (!done)
     {
         // create a new target destination in the new parentDir;
         nsCOMPtr<nsIFile> target;
         rv = newParentDir->Clone(getter_AddRefs(target));
         if (NS_FAILED(rv))
             return rv;
         nsAutoString allocatedNewName;
         if (newName.IsEmpty())
         {
             bool isLink;
             IsSymlink(&isLink);
             if (isLink)
             {
                 nsAutoString temp;
                 GetTarget(temp);
                 int32_t offset = temp.RFindChar(L'\\');
                 if (offset == kNotFound)
                     allocatedNewName = temp;
                 else
                     allocatedNewName = Substring(temp, offset + 1);
             }
             else
             {
                 GetLeafName(allocatedNewName);// this should be the leaf name of the
             }
         }
         else
         {
             allocatedNewName = newName;
         }
         rv = target->Append(allocatedNewName);
         if (NS_FAILED(rv))
             return rv;
         allocatedNewName.Truncate();
         // check if the destination directory already exists
         target->Exists(&exists);
         if (!exists)
         {
             // if the destination directory cannot be created, return an error
             rv = target->Create(DIRECTORY_TYPE, 0644);  // TODO, what permissions should we use
             if (NS_FAILED(rv))
                 return rv;
         }
         else
         {
             // check if the destination directory is writable and empty
             bool isWritable;
             target->IsWritable(&isWritable);
             if (!isWritable)
                 return NS_ERROR_FILE_ACCESS_DENIED;
             nsCOMPtr<nsISimpleEnumerator> targetIterator;
             rv = target->GetDirectoryEntries(getter_AddRefs(targetIterator));
             if (NS_FAILED(rv))
                 return rv;
             bool more;
             targetIterator->HasMoreElements(&more);
             // return error if target directory is not empty
             if (more)
                 return NS_ERROR_FILE_DIR_NOT_EMPTY;
         }
         nsDirEnumerator dirEnum;
         rv = dirEnum.Init(this);
         if (NS_FAILED(rv)) {
             NS_WARNING("dirEnum initialization failed");
             return rv;
         }
         bool more = false;
         while (NS_SUCCEEDED(dirEnum.HasMoreElements(&more)) && more)
         {
             nsCOMPtr<nsISupports> item;
             nsCOMPtr<nsIFile> file;
             dirEnum.GetNext(getter_AddRefs(item));
             file = do_QueryInterface(item);
             if (file)
             {
                 bool isDir, isLink;
                 file->IsDirectory(&isDir);
                 file->IsSymlink(&isLink);
                 if (move)
                 {
                     if (followSymlinks)
                         return NS_ERROR_FAILURE;
                     rv = file->MoveTo(target, EmptyString());
                     if (NS_FAILED(rv))
                         return rv;
                 }
                 else
                 {
                     if (followSymlinks)
                         rv = file->CopyToFollowingLinks(target, EmptyString());
                     else
                         rv = file->CopyTo(target, EmptyString());
                     if (NS_FAILED(rv))
                         return rv;
                 }
             }
         }
         // we've finished moving all the children of this directory
         // in the new directory.  so now delete the directory
         // note, we don't need to do a recursive delete.
         // MoveTo() is recursive.  At this point,
         // we've already moved the children of the current folder
         // to the new location.  nothing should be left in the folder.
         if (move)
         {
           rv = Remove(false /* recursive */);
           if (NS_FAILED(rv))
               return rv;
         }
     }
     // If we moved, we want to adjust this.
     if (move)
     {
         MakeDirty();
         nsAutoString newParentPath;
         newParentDir->GetPath(newParentPath);
         if (newParentPath.IsEmpty())
             return NS_ERROR_FAILURE;
         if (newName.IsEmpty())
         {
             nsAutoString aFileName;
             GetLeafName(aFileName);
             InitWithPath(newParentPath);
             Append(aFileName);
         }
         else
         {
             InitWithPath(newParentPath);
             Append(newName);
         }
     }
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::CopyTo(nsIFile *newParentDir, const nsAString &newName)
 {
     return CopyMove(newParentDir, newName, 0);
 }
 NS_IMETHODIMP
 nsLocalFile::CopyToFollowingLinks(nsIFile *newParentDir, const nsAString &newName)
 {
     return CopyMove(newParentDir, newName, FollowSymlinks);
 }
 NS_IMETHODIMP
 nsLocalFile::MoveTo(nsIFile *newParentDir, const nsAString &newName)
 {
     return CopyMove(newParentDir, newName, Move);
 }
 NS_IMETHODIMP
 nsLocalFile::RenameTo(nsIFile *newParentDir, const nsAString & newName)
 {
   nsCOMPtr<nsIFile> targetParentDir = newParentDir;
   // check to see if this exists, otherwise return an error.
   // we will check this by resolving.  If the user wants us
   // to follow links, then we are talking about the target,
   // hence we can use the |followSymlinks| parameter.
   nsresult rv = ResolveAndStat();
   if (NS_FAILED(rv)) {
     return rv;
   }
   if (!targetParentDir) {
     // no parent was specified.  We must rename.
     if (newName.IsEmpty()) {
       return NS_ERROR_INVALID_ARG;
     }
     rv = GetParent(getter_AddRefs(targetParentDir));
     if (NS_FAILED(rv)) {
       return rv;
     }
   }
   if (!targetParentDir) {
     return NS_ERROR_FILE_DESTINATION_NOT_DIR;
   }
   // make sure it exists and is a directory.  Create it if not there.
   bool exists;
   targetParentDir->Exists(&exists);
   if (!exists) {
     rv = targetParentDir->Create(DIRECTORY_TYPE, 0644);
     if (NS_FAILED(rv)) {
       return rv;
     }
   } else {
     bool isDir;
     targetParentDir->IsDirectory(&isDir);
     if (!isDir) {
       return NS_ERROR_FILE_DESTINATION_NOT_DIR;
     }
   }
   uint32_t options = Rename;
   if (!newParentDir) {
     options |= SkipNtfsAclReset;
   }
   // Move single file, or move a directory
   return CopySingleFile(this, targetParentDir, newName, options);
 }
 NS_IMETHODIMP
 nsLocalFile::Load(PRLibrary * *_retval)
 {
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     bool isFile;
     nsresult rv = IsFile(&isFile);
     if (NS_FAILED(rv))
         return rv;
     if (! isFile)
         return NS_ERROR_FILE_IS_DIRECTORY;
 #ifdef NS_BUILD_REFCNT_LOGGING
     nsTraceRefcnt::SetActivityIsLegal(false);
 #endif
     PRLibSpec libSpec;
     libSpec.value.pathname_u = mResolvedPath.get();
     libSpec.type = PR_LibSpec_PathnameU;
     *_retval =  PR_LoadLibraryWithFlags(libSpec, 0);
 #ifdef NS_BUILD_REFCNT_LOGGING
     nsTraceRefcnt::SetActivityIsLegal(true);
 #endif
     if (*_retval)
         return NS_OK;
     return NS_ERROR_NULL_POINTER;
 }
 NS_IMETHODIMP
 nsLocalFile::Remove(bool recursive)
 {
     // NOTE:
     //
     // if the working path points to a shortcut, then we will only
     // delete the shortcut itself.  even if the shortcut points to
     // a directory, we will not recurse into that directory or
     // delete that directory itself.  likewise, if the shortcut
     // points to a normal file, we will not delete the real file.
     // this is done to be consistent with the other platforms that
     // behave this way.  we do this even if the followLinks attribute
     // is set to true.  this helps protect against misuse that could
     // lead to security bugs (e.g., bug 210588).
     //
     // Since shortcut files are no longer permitted to be used as unix-like
     // symlinks interspersed in the path (e.g. "c:/file.lnk/foo/bar.txt")
     // this processing is a lot simpler. Even if the shortcut file is
     // pointing to a directory, only the mWorkingPath value is used and so
     // only the shortcut file will be deleted.
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     bool isDir, isLink;
     nsresult rv;
     isDir = false;
     rv = IsSymlink(&isLink);
     if (NS_FAILED(rv))
         return rv;
     // only check to see if we have a directory if it isn't a link
     if (!isLink)
     {
         rv = IsDirectory(&isDir);
         if (NS_FAILED(rv))
             return rv;
     }
     if (isDir)
     {
         if (recursive)
         {
             nsDirEnumerator dirEnum;
             rv = dirEnum.Init(this);
             if (NS_FAILED(rv))
                 return rv;
             bool more = false;
             while (NS_SUCCEEDED(dirEnum.HasMoreElements(&more)) && more)
             {
                 nsCOMPtr<nsISupports> item;
                 dirEnum.GetNext(getter_AddRefs(item));
                 nsCOMPtr<nsIFile> file = do_QueryInterface(item);
                 if (file)
                     file->Remove(recursive);
             }
         }
         if (RemoveDirectoryW(mWorkingPath.get()) == 0)
             return ConvertWinError(GetLastError());
     }
     else
     {
         if (DeleteFileW(mWorkingPath.get()) == 0)
             return ConvertWinError(GetLastError());
     }
     MakeDirty();
     return rv;
 }
 NS_IMETHODIMP
 nsLocalFile::GetLastModifiedTime(PRTime *aLastModifiedTime)
 {
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     if (NS_WARN_IF(!aLastModifiedTime))
         return NS_ERROR_INVALID_ARG;
     // get the modified time of the target as determined by mFollowSymlinks
     // If true, then this will be for the target of the shortcut file,
     // otherwise it will be for the shortcut file itself (i.e. the same
     // results as GetLastModifiedTimeOfLink)
     nsresult rv = ResolveAndStat();
     if (NS_FAILED(rv))
         return rv;
     // microseconds -> milliseconds
     *aLastModifiedTime = mFileInfo64.modifyTime / PR_USEC_PER_MSEC;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::GetLastModifiedTimeOfLink(PRTime *aLastModifiedTime)
 {
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     if (NS_WARN_IF(!aLastModifiedTime))
         return NS_ERROR_INVALID_ARG;
     // The caller is assumed to have already called IsSymlink
     // and to have found that this file is a link.
     PRFileInfo64 info;
     nsresult rv = GetFileInfo(mWorkingPath, &info);
     if (NS_FAILED(rv))
         return rv;
     // microseconds -> milliseconds
     *aLastModifiedTime = info.modifyTime / PR_USEC_PER_MSEC;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::SetLastModifiedTime(PRTime aLastModifiedTime)
 {
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     nsresult rv = ResolveAndStat();
     if (NS_FAILED(rv))
         return rv;
     // set the modified time of the target as determined by mFollowSymlinks
     // If true, then this will be for the target of the shortcut file,
     // otherwise it will be for the shortcut file itself (i.e. the same
     // results as SetLastModifiedTimeOfLink)
     rv = SetModDate(aLastModifiedTime, mResolvedPath.get());
     if (NS_SUCCEEDED(rv))
         MakeDirty();
     return rv;
 }
 NS_IMETHODIMP
 nsLocalFile::SetLastModifiedTimeOfLink(PRTime aLastModifiedTime)
 {
     // The caller is assumed to have already called IsSymlink
     // and to have found that this file is a link.
     nsresult rv = SetModDate(aLastModifiedTime, mWorkingPath.get());
     if (NS_SUCCEEDED(rv))
         MakeDirty();
     return rv;
 }
 nsresult
 nsLocalFile::SetModDate(PRTime aLastModifiedTime, const wchar_t *filePath)
 {
     // The FILE_FLAG_BACKUP_SEMANTICS is required in order to change the
     // modification time for directories.
     HANDLE file = ::CreateFileW(filePath,          // pointer to name of the file
                                 GENERIC_WRITE,     // access (write) mode
 ,                 // share mode
                                 nullptr,           // pointer to security attributes
                                 OPEN_EXISTING,     // how to create
                                 FILE_FLAG_BACKUP_SEMANTICS,  // file attributes
                                 nullptr);
     if (file == INVALID_HANDLE_VALUE)
     {
         return ConvertWinError(GetLastError());
     }
     FILETIME ft;
     SYSTEMTIME st;
     PRExplodedTime pret;
     // PR_ExplodeTime expects usecs...
     PR_ExplodeTime(aLastModifiedTime * PR_USEC_PER_MSEC, PR_GMTParameters, &pret);
     st.wYear            = pret.tm_year;
     st.wMonth           = pret.tm_month + 1; // Convert start offset -- Win32: Jan=1; NSPR: Jan=0
     st.wDayOfWeek       = pret.tm_wday;
     st.wDay             = pret.tm_mday;
     st.wHour            = pret.tm_hour;
     st.wMinute          = pret.tm_min;
     st.wSecond          = pret.tm_sec;
     st.wMilliseconds    = pret.tm_usec/1000;
     nsresult rv = NS_OK;
     // if at least one of these fails...
     if (!(SystemTimeToFileTime(&st, &ft) != 0 &&
           SetFileTime(file, nullptr, &ft, &ft) != 0))
     {
       rv = ConvertWinError(GetLastError());
     }
     CloseHandle(file);
     return rv;
 }
 NS_IMETHODIMP
 nsLocalFile::GetPermissions(uint32_t *aPermissions)
 {
     if (NS_WARN_IF(!aPermissions))
         return NS_ERROR_INVALID_ARG;
     // get the permissions of the target as determined by mFollowSymlinks
     // If true, then this will be for the target of the shortcut file,
     // otherwise it will be for the shortcut file itself (i.e. the same
     // results as GetPermissionsOfLink)
     nsresult rv = ResolveAndStat();
     if (NS_FAILED(rv))
         return rv;
     bool isWritable, isExecutable;
     IsWritable(&isWritable);
     IsExecutable(&isExecutable);
     *aPermissions = PR_IRUSR|PR_IRGRP|PR_IROTH;         // all read
     if (isWritable)
         *aPermissions |= PR_IWUSR|PR_IWGRP|PR_IWOTH;    // all write
     if (isExecutable)
         *aPermissions |= PR_IXUSR|PR_IXGRP|PR_IXOTH;    // all execute
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::GetPermissionsOfLink(uint32_t *aPermissions)
 {
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     if (NS_WARN_IF(!aPermissions))
         return NS_ERROR_INVALID_ARG;
     // The caller is assumed to have already called IsSymlink
     // and to have found that this file is a link. It is not
     // possible for a link file to be executable.
     DWORD word = ::GetFileAttributesW(mWorkingPath.get());
     if (word == INVALID_FILE_ATTRIBUTES)
         return NS_ERROR_FILE_INVALID_PATH;
     bool isWritable = !(word & FILE_ATTRIBUTE_READONLY);
     *aPermissions = PR_IRUSR|PR_IRGRP|PR_IROTH;         // all read
     if (isWritable)
         *aPermissions |= PR_IWUSR|PR_IWGRP|PR_IWOTH;    // all write
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::SetPermissions(uint32_t aPermissions)
 {
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     // set the permissions of the target as determined by mFollowSymlinks
     // If true, then this will be for the target of the shortcut file,
     // otherwise it will be for the shortcut file itself (i.e. the same
     // results as SetPermissionsOfLink)
     nsresult rv = ResolveAndStat();
     if (NS_FAILED(rv))
         return rv;
     // windows only knows about the following permissions
     int mode = 0;
     if (aPermissions & (PR_IRUSR|PR_IRGRP|PR_IROTH))    // any read
         mode |= _S_IREAD;
     if (aPermissions & (PR_IWUSR|PR_IWGRP|PR_IWOTH))    // any write
         mode |= _S_IWRITE;
     if (_wchmod(mResolvedPath.get(), mode) == -1)
         return NS_ERROR_FAILURE;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::SetPermissionsOfLink(uint32_t aPermissions)
 {
     // The caller is assumed to have already called IsSymlink
     // and to have found that this file is a link.
     // windows only knows about the following permissions
     int mode = 0;
     if (aPermissions & (PR_IRUSR|PR_IRGRP|PR_IROTH))    // any read
         mode |= _S_IREAD;
     if (aPermissions & (PR_IWUSR|PR_IWGRP|PR_IWOTH))    // any write
         mode |= _S_IWRITE;
     if (_wchmod(mWorkingPath.get(), mode) == -1)
         return NS_ERROR_FAILURE;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::GetFileSize(int64_t *aFileSize)
 {
     if (NS_WARN_IF(!aFileSize))
         return NS_ERROR_INVALID_ARG;
     nsresult rv = ResolveAndStat();
     if (NS_FAILED(rv))
         return rv;
     *aFileSize = mFileInfo64.size;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::GetFileSizeOfLink(int64_t *aFileSize)
 {
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     if (NS_WARN_IF(!aFileSize))
         return NS_ERROR_INVALID_ARG;
     // The caller is assumed to have already called IsSymlink
     // and to have found that this file is a link.
     PRFileInfo64 info;
     if (NS_FAILED(GetFileInfo(mWorkingPath, &info)))
         return NS_ERROR_FILE_INVALID_PATH;
     *aFileSize = info.size;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::SetFileSize(int64_t aFileSize)
 {
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     nsresult rv = ResolveAndStat();
     if (NS_FAILED(rv))
         return rv;
     HANDLE hFile = ::CreateFileW(mResolvedPath.get(),// pointer to name of the file
                                  GENERIC_WRITE,      // access (write) mode
                                  FILE_SHARE_READ,    // share mode
                                  nullptr,            // pointer to security attributes
                                  OPEN_EXISTING,          // how to create
                                  FILE_ATTRIBUTE_NORMAL,  // file attributes
                                  nullptr);
     if (hFile == INVALID_HANDLE_VALUE)
     {
         return ConvertWinError(GetLastError());
     }
     // seek the file pointer to the new, desired end of file
     // and then truncate the file at that position
     rv = NS_ERROR_FAILURE;
     aFileSize = MyFileSeek64(hFile, aFileSize, FILE_BEGIN);
     if (aFileSize != -1 && SetEndOfFile(hFile))
     {
         MakeDirty();
         rv = NS_OK;
     }
     CloseHandle(hFile);
     return rv;
 }
 NS_IMETHODIMP
 nsLocalFile::GetDiskSpaceAvailable(int64_t *aDiskSpaceAvailable)
 {
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     if (NS_WARN_IF(!aDiskSpaceAvailable))
         return NS_ERROR_INVALID_ARG;
     ResolveAndStat();
     if (mFileInfo64.type == PR_FILE_FILE) {
       // Since GetDiskFreeSpaceExW works only on directories, use the parent.
       nsCOMPtr<nsIFile> parent;
       if (NS_SUCCEEDED(GetParent(getter_AddRefs(parent))) && parent) {
         return parent->GetDiskSpaceAvailable(aDiskSpaceAvailable);
       }
     }
     ULARGE_INTEGER liFreeBytesAvailableToCaller, liTotalNumberOfBytes;
     if (::GetDiskFreeSpaceExW(mResolvedPath.get(), &liFreeBytesAvailableToCaller,
                               &liTotalNumberOfBytes, nullptr))
     {
         *aDiskSpaceAvailable = liFreeBytesAvailableToCaller.QuadPart;
         return NS_OK;
     }
     *aDiskSpaceAvailable = 0;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::GetParent(nsIFile * *aParent)
 {
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     if (NS_WARN_IF(!aParent))
         return NS_ERROR_INVALID_ARG;
     // A two-character path must be a drive such as C:, so it has no parent
     if (mWorkingPath.Length() == 2) {
         *aParent = nullptr;
         return NS_OK;
     }
     int32_t offset = mWorkingPath.RFindChar(char16_t('\\'));
     // adding this offset check that was removed in bug 241708 fixes mail
     // directories that aren't relative to/underneath the profile dir.
     // e.g., on a different drive. Before you remove them, please make
     // sure local mail directories that aren't underneath the profile dir work.
     if (offset == kNotFound)
       return NS_ERROR_FILE_UNRECOGNIZED_PATH;
     // A path of the form \\NAME is a top-level path and has no parent
     if (offset == 1 && mWorkingPath[0] == L'\\') {
         *aParent = nullptr;
         return NS_OK;
     }
     nsAutoString parentPath(mWorkingPath);
     if (offset > 0)
         parentPath.Truncate(offset);
     else
         parentPath.AssignLiteral("\\\\.");
     nsCOMPtr<nsIFile> localFile;
     nsresult rv = NS_NewLocalFile(parentPath, mFollowSymlinks, getter_AddRefs(localFile));
     if (NS_FAILED(rv)) {
         return rv;
     }
     localFile.forget(aParent);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::Exists(bool *_retval)
 {
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     if (NS_WARN_IF(!_retval))
         return NS_ERROR_INVALID_ARG;
     *_retval = false;
     MakeDirty();
     nsresult rv = ResolveAndStat();
     *_retval = NS_SUCCEEDED(rv) || rv == NS_ERROR_FILE_IS_LOCKED;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::IsWritable(bool *aIsWritable)
 {
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     // The read-only attribute on a FAT directory only means that it can't
     // be deleted. It is still possible to modify the contents of the directory.
     nsresult rv = IsDirectory(aIsWritable);
     if (rv == NS_ERROR_FILE_ACCESS_DENIED) {
       *aIsWritable = true;
       return NS_OK;
     } else if (rv == NS_ERROR_FILE_IS_LOCKED) {
       // If the file is normally allowed write access
       // we should still return that the file is writable.
     } else if (NS_FAILED(rv)) {
         return rv;
     }
     if (*aIsWritable)
         return NS_OK;
     // writable if the file doesn't have the readonly attribute
     rv = HasFileAttribute(FILE_ATTRIBUTE_READONLY, aIsWritable);
     if (rv == NS_ERROR_FILE_ACCESS_DENIED) {
         *aIsWritable = false;
         return NS_OK;
     } else if (rv == NS_ERROR_FILE_IS_LOCKED) {
       // If the file is normally allowed write access
       // we should still return that the file is writable.
     } else if (NS_FAILED(rv)) {
         return rv;
     }
     *aIsWritable = !*aIsWritable;
     // If the read only attribute is not set, check to make sure
     // we can open the file with write access.
     if (*aIsWritable) {
         PRFileDesc* file;
         rv = OpenFile(mResolvedPath, PR_WRONLY, 0, &file);
         if (NS_SUCCEEDED(rv)) {
             PR_Close(file);
         } else if (rv == NS_ERROR_FILE_ACCESS_DENIED) {
           *aIsWritable = false;
         } else if (rv == NS_ERROR_FILE_IS_LOCKED) {
             // If it is locked and read only we would have
             // gotten access denied
             *aIsWritable = true;
         } else {
             return rv;
         }
     }
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::IsReadable(bool *_retval)
 {
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     if (NS_WARN_IF(!_retval))
         return NS_ERROR_INVALID_ARG;
     *_retval = false;
     nsresult rv = ResolveAndStat();
     if (NS_FAILED(rv))
         return rv;
     *_retval = true;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::IsExecutable(bool *_retval)
 {
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     if (NS_WARN_IF(!_retval))
         return NS_ERROR_INVALID_ARG;
     *_retval = false;
     nsresult rv;
     // only files can be executables
     bool isFile;
     rv = IsFile(&isFile);
     if (NS_FAILED(rv))
         return rv;
     if (!isFile)
         return NS_OK;
     //TODO: shouldn't we be checking mFollowSymlinks here?
     bool symLink;
     rv = IsSymlink(&symLink);
     if (NS_FAILED(rv))
         return rv;
     nsAutoString path;
     if (symLink)
         GetTarget(path);
     else
         GetPath(path);
     // kill trailing dots and spaces.
     int32_t filePathLen = path.Length() - 1;
     while(filePathLen > 0 && (path[filePathLen] == L' ' || path[filePathLen] == L'.'))
     {
         path.Truncate(filePathLen--);
     }
     // Get extension.
     int32_t dotIdx = path.RFindChar(char16_t('.'));
     if ( dotIdx != kNotFound ) {
         // Convert extension to lower case.
         char16_t *p = path.BeginWriting();
         for( p+= dotIdx + 1; *p; p++ )
             *p +=  (*p >= L'A' && *p <= L'Z') ? 'a' - 'A' : 0;
         // Search for any of the set of executable extensions.
         static const char * const executableExts[] = {
             "ad",
             "ade",         // access project extension
             "adp",
             "air",         // Adobe AIR installer
             "app",         // executable application
             "application", // from bug 348763
             "asp",
             "bas",
             "bat",
             "chm",
             "cmd",
             "com",
             "cpl",
             "crt",
             "exe",
             "fxp",         // FoxPro compiled app
             "hlp",
             "hta",
             "inf",
             "ins",
             "isp",
             "jar",         // java application bundle
             "js",
             "jse",
             "lnk",
             "mad",         // Access Module Shortcut
             "maf",         // Access
             "mag",         // Access Diagram Shortcut
             "mam",         // Access Macro Shortcut
             "maq",         // Access Query Shortcut
             "mar",         // Access Report Shortcut
             "mas",         // Access Stored Procedure
             "mat",         // Access Table Shortcut
             "mau",         // Media Attachment Unit
             "mav",         // Access View Shortcut
             "maw",         // Access Data Access Page
             "mda",         // Access Add-in, MDA Access 2 Workgroup
             "mdb",
             "mde",
             "mdt",         // Access Add-in Data
             "mdw",         // Access Workgroup Information
             "mdz",         // Access Wizard Template
             "msc",
             "msh",         // Microsoft Shell
             "mshxml",      // Microsoft Shell
             "msi",
             "msp",
             "mst",
             "ops",         // Office Profile Settings
             "pcd",
             "pif",
             "plg",         // Developer Studio Build Log
             "prf",         // windows system file
             "prg",
             "pst",
             "reg",
             "scf",         // Windows explorer command
             "scr",
             "sct",
             "shb",
             "shs",
             "url",
             "vb",
             "vbe",
             "vbs",
             "vsd",
             "vsmacros",    // Visual Studio .NET Binary-based Macro Project
             "vss",
             "vst",
             "vsw",
             "ws",
             "wsc",
             "wsf",
             "wsh"};
         nsDependentSubstring ext = Substring(path, dotIdx + 1);
         for ( size_t i = 0; i < ArrayLength(executableExts); i++ ) {
             if ( ext.EqualsASCII(executableExts[i])) {
                 // Found a match.  Set result and quit.
                 *_retval = true;
                 break;
             }
         }
     }
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::IsDirectory(bool *_retval)
 {
     return HasFileAttribute(FILE_ATTRIBUTE_DIRECTORY, _retval);
 }
 NS_IMETHODIMP
 nsLocalFile::IsFile(bool *_retval)
 {
     nsresult rv = HasFileAttribute(FILE_ATTRIBUTE_DIRECTORY, _retval);
     if (NS_SUCCEEDED(rv)) {
         *_retval = !*_retval;
     }
     return rv;
 }
 NS_IMETHODIMP
 nsLocalFile::IsHidden(bool *_retval)
 {
     return HasFileAttribute(FILE_ATTRIBUTE_HIDDEN, _retval);
 }
 nsresult
 nsLocalFile::HasFileAttribute(DWORD fileAttrib, bool *_retval)
 {
     if (NS_WARN_IF(!_retval))
         return NS_ERROR_INVALID_ARG;
     nsresult rv = Resolve();
     if (NS_FAILED(rv)) {
         return rv;
     }
     DWORD attributes = GetFileAttributesW(mResolvedPath.get());
     if (INVALID_FILE_ATTRIBUTES == attributes) {
         return ConvertWinError(GetLastError());
     }
     *_retval = ((attributes & fileAttrib) != 0);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::IsSymlink(bool *_retval)
 {
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     if (NS_WARN_IF(!_retval))
         return NS_ERROR_INVALID_ARG;
     // unless it is a valid shortcut path it's not a symlink
     if (!IsShortcutPath(mWorkingPath)) {
         *_retval = false;
         return NS_OK;
     }
     // we need to know if this is a file or directory
     nsresult rv = ResolveAndStat();
     if (NS_FAILED(rv)) {
         return rv;
     }
     // We should not check mFileInfo64.type here for PR_FILE_FILE because lnk
     // files can point to directories or files.  Important security checks
     // depend on correctly identifying lnk files.  mFileInfo64 now holds info
     // about the target of the lnk file, not the actual lnk file!
     *_retval = true;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::IsSpecial(bool *_retval)
 {
     return HasFileAttribute(FILE_ATTRIBUTE_SYSTEM, _retval);
 }
 NS_IMETHODIMP
 nsLocalFile::Equals(nsIFile *inFile, bool *_retval)
 {
     if (NS_WARN_IF(!inFile))
         return NS_ERROR_INVALID_ARG;
     if (NS_WARN_IF(!_retval))
         return NS_ERROR_INVALID_ARG;
     EnsureShortPath();
     nsCOMPtr<nsILocalFileWin> lf(do_QueryInterface(inFile));
     if (!lf) {
         *_retval = false;
         return NS_OK;
     }
     nsAutoString inFilePath;
     lf->GetCanonicalPath(inFilePath);
     // Ok : Win9x
     *_retval = _wcsicmp(mShortWorkingPath.get(), inFilePath.get()) == 0;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::Contains(nsIFile *inFile, bool recur, bool *_retval)
 {
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     *_retval = false;
     nsAutoString myFilePath;
     if (NS_FAILED(GetTarget(myFilePath)))
         GetPath(myFilePath);
     uint32_t myFilePathLen = myFilePath.Length();
     nsAutoString inFilePath;
     if (NS_FAILED(inFile->GetTarget(inFilePath)))
         inFile->GetPath(inFilePath);
     // make sure that the |inFile|'s path has a trailing separator.
     if (inFilePath.Length() >= myFilePathLen && inFilePath[myFilePathLen] == L'\\')
     {
         if (_wcsnicmp(myFilePath.get(), inFilePath.get(), myFilePathLen) == 0)
         {
             *_retval = true;
         }
     }
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::GetTarget(nsAString &_retval)
 {
     _retval.Truncate();
 #if STRICT_FAKE_SYMLINKS
     bool symLink;
     nsresult rv = IsSymlink(&symLink);
     if (NS_FAILED(rv))
         return rv;
     if (!symLink)
     {
         return NS_ERROR_FILE_INVALID_PATH;
     }
 #endif
     ResolveAndStat();
     _retval = mResolvedPath;
     return NS_OK;
 }
 /* attribute bool followLinks; */
 NS_IMETHODIMP
 nsLocalFile::GetFollowLinks(bool *aFollowLinks)
 {
     *aFollowLinks = mFollowSymlinks;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::SetFollowLinks(bool aFollowLinks)
 {
     MakeDirty();
     mFollowSymlinks = aFollowLinks;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::GetDirectoryEntries(nsISimpleEnumerator * *entries)
 {
     nsresult rv;
     *entries = nullptr;
     if (mWorkingPath.EqualsLiteral("\\\\.")) {
         nsDriveEnumerator *drives = new nsDriveEnumerator;
         if (!drives)
             return NS_ERROR_OUT_OF_MEMORY;
         NS_ADDREF(drives);
         rv = drives->Init();
         if (NS_FAILED(rv)) {
             NS_RELEASE(drives);
             return rv;
         }
         *entries = drives;
         return NS_OK;
     }
     nsDirEnumerator* dirEnum = new nsDirEnumerator();
     if (dirEnum == nullptr)
         return NS_ERROR_OUT_OF_MEMORY;
     NS_ADDREF(dirEnum);
     rv = dirEnum->Init(this);
     if (NS_FAILED(rv))
     {
         NS_RELEASE(dirEnum);
         return rv;
     }
     *entries = dirEnum;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::GetPersistentDescriptor(nsACString &aPersistentDescriptor)
 {
     CopyUTF16toUTF8(mWorkingPath, aPersistentDescriptor);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::SetPersistentDescriptor(const nsACString &aPersistentDescriptor)
 {
     if (IsUTF8(aPersistentDescriptor))
         return InitWithPath(NS_ConvertUTF8toUTF16(aPersistentDescriptor));
     else
         return InitWithNativePath(aPersistentDescriptor);
 }
 /* attrib unsigned long fileAttributesWin; */
 NS_IMETHODIMP
 nsLocalFile::GetFileAttributesWin(uint32_t *aAttribs)
 {
     *aAttribs = 0;
     DWORD dwAttrs = GetFileAttributesW(mWorkingPath.get());
     if (dwAttrs == INVALID_FILE_ATTRIBUTES)
       return NS_ERROR_FILE_INVALID_PATH;
     if (!(dwAttrs & FILE_ATTRIBUTE_NOT_CONTENT_INDEXED))
         *aAttribs |= WFA_SEARCH_INDEXED;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::SetFileAttributesWin(uint32_t aAttribs)
 {
     DWORD dwAttrs = GetFileAttributesW(mWorkingPath.get());
     if (dwAttrs == INVALID_FILE_ATTRIBUTES)
       return NS_ERROR_FILE_INVALID_PATH;
     if (aAttribs & WFA_SEARCH_INDEXED) {
         dwAttrs &= ~FILE_ATTRIBUTE_NOT_CONTENT_INDEXED;
     } else {
         dwAttrs |= FILE_ATTRIBUTE_NOT_CONTENT_INDEXED;
     }
     if (aAttribs & WFA_READONLY) {
       dwAttrs |= FILE_ATTRIBUTE_READONLY;
     } else if ((aAttribs & WFA_READWRITE) &&
                (dwAttrs & FILE_ATTRIBUTE_READONLY)) {
       dwAttrs &= ~FILE_ATTRIBUTE_READONLY;
     }
     if (SetFileAttributesW(mWorkingPath.get(), dwAttrs) == 0)
       return NS_ERROR_FAILURE;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::Reveal()
 {
     // This API should be main thread only
     MOZ_ASSERT(NS_IsMainThread());
     // make sure mResolvedPath is set
     nsresult rv = Resolve();
     if (NS_FAILED(rv) && rv != NS_ERROR_FILE_NOT_FOUND) {
         return rv;
     }
     // To create a new thread, get the thread manager
     nsCOMPtr<nsIThreadManager> tm = do_GetService(NS_THREADMANAGER_CONTRACTID);
     nsCOMPtr<nsIThread> mythread;
     rv = tm->NewThread(0, 0, getter_AddRefs(mythread));
     if (NS_FAILED(rv)) {
         return rv;
     }
     nsCOMPtr<nsIRunnable> runnable =
         new AsyncLocalFileWinOperation(AsyncLocalFileWinOperation::RevealOp,
                                        mResolvedPath);
     // After the dispatch, the result runnable will shut down the worker
     // thread, so we can let it go.
     mythread->Dispatch(runnable, NS_DISPATCH_NORMAL);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::Launch()
 {
     // This API should be main thread only
     MOZ_ASSERT(NS_IsMainThread());
     // make sure mResolvedPath is set
     nsresult rv = Resolve();
     if (NS_FAILED(rv))
         return rv;
     // To create a new thread, get the thread manager
     nsCOMPtr<nsIThreadManager> tm = do_GetService(NS_THREADMANAGER_CONTRACTID);
     nsCOMPtr<nsIThread> mythread;
     rv = tm->NewThread(0, 0, getter_AddRefs(mythread));
     if (NS_FAILED(rv)) {
         return rv;
     }
     nsCOMPtr<nsIRunnable> runnable =
         new AsyncLocalFileWinOperation(AsyncLocalFileWinOperation::LaunchOp,
                                        mResolvedPath);
     // After the dispatch, the result runnable will shut down the worker
     // thread, so we can let it go.
     mythread->Dispatch(runnable, NS_DISPATCH_NORMAL);
     return NS_OK;
 }
 nsresult
 NS_NewLocalFile(const nsAString &path, bool followLinks, nsIFile* *result)
 {
     nsLocalFile* file = new nsLocalFile();
     if (file == nullptr)
         return NS_ERROR_OUT_OF_MEMORY;
     NS_ADDREF(file);
     file->SetFollowLinks(followLinks);
     if (!path.IsEmpty()) {
         nsresult rv = file->InitWithPath(path);
         if (NS_FAILED(rv)) {
             NS_RELEASE(file);
             return rv;
         }
     }
     *result = file;
     return NS_OK;
 }
 //-----------------------------------------------------------------------------
 // Native (lossy) interface
 //-----------------------------------------------------------------------------
 NS_IMETHODIMP
 nsLocalFile::InitWithNativePath(const nsACString &filePath)
 {
    nsAutoString tmp;
    nsresult rv = NS_CopyNativeToUnicode(filePath, tmp);
    if (NS_SUCCEEDED(rv))
        return InitWithPath(tmp);
    return rv;
 }
 NS_IMETHODIMP
 nsLocalFile::AppendNative(const nsACString &node)
 {
     nsAutoString tmp;
     nsresult rv = NS_CopyNativeToUnicode(node, tmp);
     if (NS_SUCCEEDED(rv))
         return Append(tmp);
     return rv;
 }
 NS_IMETHODIMP
 nsLocalFile::AppendRelativeNativePath(const nsACString &node)
 {
     nsAutoString tmp;
     nsresult rv = NS_CopyNativeToUnicode(node, tmp);
     if (NS_SUCCEEDED(rv))
         return AppendRelativePath(tmp);
     return rv;
 }
 NS_IMETHODIMP
 nsLocalFile::GetNativeLeafName(nsACString &aLeafName)
 {
     //NS_WARNING("This API is lossy. Use GetLeafName !");
     nsAutoString tmp;
     nsresult rv = GetLeafName(tmp);
     if (NS_SUCCEEDED(rv))
         rv = NS_CopyUnicodeToNative(tmp, aLeafName);
     return rv;
 }
 NS_IMETHODIMP
 nsLocalFile::SetNativeLeafName(const nsACString &aLeafName)
 {
     nsAutoString tmp;
     nsresult rv = NS_CopyNativeToUnicode(aLeafName, tmp);
     if (NS_SUCCEEDED(rv))
         return SetLeafName(tmp);
     return rv;
 }
 NS_IMETHODIMP
 nsLocalFile::GetNativePath(nsACString &_retval)
 {
     //NS_WARNING("This API is lossy. Use GetPath !");
     nsAutoString tmp;
     nsresult rv = GetPath(tmp);
     if (NS_SUCCEEDED(rv))
         rv = NS_CopyUnicodeToNative(tmp, _retval);
     return rv;
 }
 NS_IMETHODIMP
 nsLocalFile::GetNativeCanonicalPath(nsACString &aResult)
 {
     NS_WARNING("This method is lossy. Use GetCanonicalPath !");
     EnsureShortPath();
     NS_CopyUnicodeToNative(mShortWorkingPath, aResult);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsLocalFile::CopyToNative(nsIFile *newParentDir, const nsACString &newName)
 {
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     if (newName.IsEmpty())
         return CopyTo(newParentDir, EmptyString());
     nsAutoString tmp;
     nsresult rv = NS_CopyNativeToUnicode(newName, tmp);
     if (NS_SUCCEEDED(rv))
         return CopyTo(newParentDir, tmp);
     return rv;
 }
 NS_IMETHODIMP
 nsLocalFile::CopyToFollowingLinksNative(nsIFile *newParentDir, const nsACString &newName)
 {
     if (newName.IsEmpty())
         return CopyToFollowingLinks(newParentDir, EmptyString());
     nsAutoString tmp;
     nsresult rv = NS_CopyNativeToUnicode(newName, tmp);
     if (NS_SUCCEEDED(rv))
         return CopyToFollowingLinks(newParentDir, tmp);
     return rv;
 }
 NS_IMETHODIMP
 nsLocalFile::MoveToNative(nsIFile *newParentDir, const nsACString &newName)
 {
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     if (newName.IsEmpty())
         return MoveTo(newParentDir, EmptyString());
     nsAutoString tmp;
     nsresult rv = NS_CopyNativeToUnicode(newName, tmp);
     if (NS_SUCCEEDED(rv))
         return MoveTo(newParentDir, tmp);
     return rv;
 }
 NS_IMETHODIMP
 nsLocalFile::GetNativeTarget(nsACString &_retval)
 {
     // Check we are correctly initialized.
     CHECK_mWorkingPath();
     NS_WARNING("This API is lossy. Use GetTarget !");
     nsAutoString tmp;
     nsresult rv = GetTarget(tmp);
     if (NS_SUCCEEDED(rv))
         rv = NS_CopyUnicodeToNative(tmp, _retval);
     return rv;
 }
 nsresult
 NS_NewNativeLocalFile(const nsACString &path, bool followLinks, nsIFile* *result)
 {
     nsAutoString buf;
     nsresult rv = NS_CopyNativeToUnicode(path, buf);
     if (NS_FAILED(rv)) {
         *result = nullptr;
         return rv;
     }
     return NS_NewLocalFile(buf, followLinks, result);
 }
 void
 nsLocalFile::EnsureShortPath()
 {
     if (!mShortWorkingPath.IsEmpty())
         return;
     WCHAR shortPath[MAX_PATH + 1];
     DWORD lengthNeeded = ::GetShortPathNameW(mWorkingPath.get(), shortPath,
                                              ArrayLength(shortPath));
     // If an error occurred then lengthNeeded is set to 0 or the length of the
     // needed buffer including null termination.  If it succeeds the number of
     // wide characters not including null termination is returned.
     if (lengthNeeded != 0 && lengthNeeded < ArrayLength(shortPath))
         mShortWorkingPath.Assign(shortPath);
     else
         mShortWorkingPath.Assign(mWorkingPath);
 }
 // nsIHashable
 NS_IMETHODIMP
 nsLocalFile::Equals(nsIHashable* aOther, bool *aResult)
 {
     nsCOMPtr<nsIFile> otherfile(do_QueryInterface(aOther));
     if (!otherfile) {
         *aResult = false;
         return NS_OK;
     }
     return Equals(otherfile, aResult);
 }
 NS_IMETHODIMP
 nsLocalFile::GetHashCode(uint32_t *aResult)
 {
     // In order for short and long path names to hash to the same value we
     // always hash on the short pathname.
     EnsureShortPath();
     *aResult = HashString(mShortWorkingPath);
     return NS_OK;
 }
 //-----------------------------------------------------------------------------
 // nsLocalFile <static members>
 //-----------------------------------------------------------------------------
 void
 nsLocalFile::GlobalInit()
 {
     DebugOnly<nsresult> rv = NS_CreateShortcutResolver();
     NS_ASSERTION(NS_SUCCEEDED(rv), "Shortcut resolver could not be created");
 }
 void
 nsLocalFile::GlobalShutdown()
 {
     NS_DestroyShortcutResolver();
 }
 NS_IMPL_ISUPPORTS(nsDriveEnumerator, nsISimpleEnumerator)
 nsDriveEnumerator::nsDriveEnumerator()
 {
 }
 nsDriveEnumerator::~nsDriveEnumerator()
 {
 }
 nsresult nsDriveEnumerator::Init()
 {
     /* If the length passed to GetLogicalDriveStrings is smaller
      * than the length of the string it would return, it returns
      * the length required for the string. */
     DWORD length = GetLogicalDriveStringsW(0, 0);
     /* The string is null terminated */
     if (!mDrives.SetLength(length+1, fallible_t()))
         return NS_ERROR_OUT_OF_MEMORY;
     if (!GetLogicalDriveStringsW(length, wwc(mDrives.BeginWriting())))
         return NS_ERROR_FAILURE;
     mDrives.BeginReading(mStartOfCurrentDrive);
     mDrives.EndReading(mEndOfDrivesString);
     return NS_OK;
 }
 NS_IMETHODIMP nsDriveEnumerator::HasMoreElements(bool *aHasMore)
 {
     *aHasMore = *mStartOfCurrentDrive != L'\0';
     return NS_OK;
 }
 NS_IMETHODIMP nsDriveEnumerator::GetNext(nsISupports **aNext)
 {
     /* GetLogicalDrives stored in mDrives is a concatenation
      * of null terminated strings, followed by a null terminator.
      * mStartOfCurrentDrive is an iterator pointing at the first
      * character of the current drive. */
     if (*mStartOfCurrentDrive == L'\0') {
         *aNext = nullptr;
         return NS_OK;
     }
     nsAString::const_iterator driveEnd = mStartOfCurrentDrive;
     FindCharInReadable(L'\0', driveEnd, mEndOfDrivesString);
     nsString drive(Substring(mStartOfCurrentDrive, driveEnd));
     mStartOfCurrentDrive = ++driveEnd;
     nsIFile *file;
     nsresult rv = NS_NewLocalFile(drive, false, &file);
     *aNext = file;
     return rv;
 }

The Tor Browser / annotate

xpcom/io/nsLocalFileWin.cpp@97036ab72558 (annotated)

xpcom/io/nsLocalFileWin.cpp