DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Implementation

Mercurial (b66b287a2650)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */




/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 
    THESE CLASSES ARE DEPRECATED AND UNSUPPORTED!  USE |nsIFile| and |nsILocalFile|.
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */










//    First checked in on 98/11/20 by John R. McMullen in the wrong directory.
//    Checked in again 98/12/04.
//    Polished version 98/12/08.

//========================================================================================
//
//  Classes defined:
//
//      nsFilePath, nsFileURL, nsFileSpec, nsPersistentFileDescriptor
//      nsDirectoryIterator.
//
//  Q.  How should I represent files at run time?
//  A.  Use nsFileSpec.  Using char* will lose information on some platforms.
//
//  Q.  Then what are nsFilePath and nsFileURL for?
//  A.  Only when you need a char* parameter for legacy code.
//
//  Q.  How should I represent files in a persistent way (eg, in a disk file)?
//  A.  Use nsPersistentFileDescriptor.  Convert to and from nsFileSpec at run time.
//
//  This suite provides the following services:
//
//      1.  Encapsulates all platform-specific file details, so that files can be
//          described correctly without any platform #ifdefs
//
//      2.  Type safety.  This will fix the problems that used to occur because people
//          confused file paths.  They used to use const char*, which could mean three
//          or four different things.  Bugs were introduced as people coded, right up
//          to the moment Communicator 4.5 shipped.
//
//      3.  Used in conjunction with nsFileStream.h (q.v.), this supports all the power
//          and readability of the ansi stream syntax.
//
//          Basic example:
//
//              nsFilePath myPath("/Development/iotest.txt");
//
//              nsOutputFileStream testStream(nsFileSpec(myPath));
//              testStream << "Hello World" << nsEndl;
//
//      4.  Handy methods for manipulating file specifiers safely, e.g. MakeUnique(),
//          SetLeafName(), Exists().
//
//      5.  Easy cross-conversion.
//
//          Examples:
//
//              Initialize a URL from a string
//
//                  nsFileURL fileURL("file:///Development/MPW/MPW%20Shell");
//
//              Initialize a Unix-style path from a URL
//
//                  nsFilePath filePath(fileURL);
//
//              Initialize a file spec from a URL
//
//                  nsFileSpec fileSpec(fileURL);
//
//              Make the spec unique.
//
//                  fileSpec.MakeUnique();
//
//              Assign the spec to a URL (causing conversion)
//
//                  fileURL = fileSpec;
//
//              Assign a unix path using a string
//
//                  filePath = "/Development/MPW/SysErrs.err";
//
//              Assign to a file spec using a unix path (causing conversion).
//
//                  fileSpec = filePath;
//
//              Make this unique.
//
//                  fileSpec.MakeUnique();
//
//      6.  Fixes a bug that have been there for a long time, and
//          is inevitable if you use NSPR alone, where files are described as paths.
//
//          The problem affects platforms (Macintosh) in which a path does not fully
//          specify a file, because two volumes can have the same name.  This
//          is solved by holding a "private" native file spec inside the
//          nsFilePath and nsFileURL classes, which is used when appropriate.
//
//========================================================================================

#ifndef _FILESPEC_H_
#define _FILESPEC_H_

#include "xpcomobsolete.h"
#include "nsError.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include "nsCRT.h"
#include "prtypes.h"

//========================================================================================
//                          Compiler-specific macros, as needed
//========================================================================================
#if !defined(NS_USING_NAMESPACE) && (defined(__MWERKS__) || defined(_MSC_VER))
#define NS_USING_NAMESPACE
#endif

#ifdef NS_USING_NAMESPACE

#define NS_NAMESPACE_PROTOTYPE
#define NS_NAMESPACE namespace
#define NS_NAMESPACE_END
#define NS_EXPLICIT explicit
#else

#define NS_NAMESPACE_PROTOTYPE static
#define NS_NAMESPACE struct
#define NS_NAMESPACE_END ;
#define NS_EXPLICIT

#endif
//=========================== End Compiler-specific macros ===============================

#include "nsILocalFile.h"
#include "nsCOMPtr.h"

#if defined(XP_UNIX) || defined(XP_BEOS)
#include <dirent.h>
#elif defined(XP_WIN)

// This clashes with some of the Win32 system headers (specifically,
// winbase.h). Hopefully they'll have been included first; else we may
// have problems. We could include winbase.h before doing this;
// unfortunately, it'd bring in too much crap and'd slow stuff down
// more than it's worth doing.
#ifdef CreateDirectory
#undef CreateDirectory
#endif

#include "prio.h"
#elif defined(XP_OS2)
#define INCL_DOS
#define INCL_DOSERRORS
#define INCL_WIN
#define INCL_GPI
#include <os2.h>
#include "prio.h"
#endif

//========================================================================================
// Here are the allowable ways to describe a file.
//========================================================================================

class nsFileSpec;             // Preferred.  For i/o use nsInputFileStream, nsOutputFileStream
class nsFilePath;
class nsFileURL;
class nsNSPRPath;             // This can be passed to NSPR file I/O routines, if you must.
class nsPersistentFileDescriptor; // Used for storage across program launches.

#define kFileURLPrefix "file://"
#define kFileURLPrefixLength (7)

class nsOutputStream;
class nsInputStream;
class nsIOutputStream;
class nsIInputStream;
class nsOutputFileStream;
class nsInputFileStream;
class nsOutputConsoleStream;

class nsIUnicodeEncoder;
class nsIUnicodeDecoder;

//========================================================================================
// Conversion of native file errors to nsresult values. These are really only for use
// in the file module, clients of this interface shouldn't really need them.
// Error results returned from this interface have, in the low-order 16 bits,
// native errors that are masked to 16 bits.  Assumption: a native error of 0 is success
// on all platforms. Note the way we define this using an inline function.  This
// avoids multiple evaluation if people go NS_FILE_RESULT(function_call()).
#define NS_FILE_RESULT(x) ns_file_convert_result((PRInt32)x)
nsresult ns_file_convert_result(PRInt32 nativeErr);
#define NS_FILE_FAILURE NS_FILE_RESULT(-1)

//========================================================================================
class nsSimpleCharString
//  An envelope for char*: reference counted. Used internally by all the nsFileSpec
//  classes below.
//========================================================================================
{
public:
                                 nsSimpleCharString();
                                 nsSimpleCharString(const char*);
                                 nsSimpleCharString(const nsString&);
                                 nsSimpleCharString(const nsSimpleCharString&);
                                 nsSimpleCharString(const char* inData, PRUint32 inLength);
                                 
                                 ~nsSimpleCharString();
                                 
    void                         operator = (const char*);
    void                         operator = (const nsString&);
    void                         operator = (const nsSimpleCharString&);
                                 
                                 operator const char*() const { return mData ? mData->mString : 0; }
                                 operator char* ()
                                 {
                                     ReallocData(Length()); // requires detaching if shared...
                                     return mData ? mData->mString : 0;
                                 }
    PRBool                       operator == (const char*);
    PRBool                       operator == (const nsString&);
    PRBool                       operator == (const nsSimpleCharString&);

    void                         operator += (const char* inString);
    nsSimpleCharString           operator + (const char* inString) const;
    
    char                         operator [](int i) const { return mData ? mData->mString[i] : '\0'; }
    char&                        operator [](int i)
                                 {
                                     if (i >= (int)Length())
                                         ReallocData((PRUint32)i + 1);
                                     return mData->mString[i]; // caveat appelator
                                 }
    char&                        operator [](unsigned int i) { return (*this)[(int)i]; }
    
    void                         Catenate(const char* inString1, const char* inString2);
   
    void                         SetToEmpty(); 
    PRBool                       IsEmpty() const { return Length() == 0; }
    
    PRUint32                     Length() const { return mData ? mData->mLength : 0; }
    void                         SetLength(PRUint32 inLength) { ReallocData(inLength); }
    void                         CopyFrom(const char* inData, PRUint32 inLength);
    void                         LeafReplace(char inSeparator, const char* inLeafName);
    char*                        GetLeaf(char inSeparator) const; // use PR_Free()
    void                         Unescape();

protected:

    void                         AddRefData();
    void                         ReleaseData();
    void                         ReallocData(PRUint32 inLength);

    //--------------------------------------------------
    // Data
    //--------------------------------------------------

protected:

    struct Data {
        int         mRefCount;
        PRUint32    mLength;
        char        mString[1];
        };
    Data*                        mData;
}; // class nsSimpleCharString

//========================================================================================
class NS_COM_OBSOLETE nsFileSpec
//    This is whatever each platform really prefers to describe files as.  Declared first
//  because the other two types have an embedded nsFileSpec object.
//========================================================================================
{
    public:
                                nsFileSpec();
                                
                                // These two methods take *native* file paths.
        NS_EXPLICIT             nsFileSpec(const char* inNativePath, PRBool inCreateDirs = PR_FALSE);
        NS_EXPLICIT             nsFileSpec(const nsString& inNativePath, PRBool inCreateDirs = PR_FALSE);
                                
        
        NS_EXPLICIT             nsFileSpec(const nsFilePath& inPath);
        NS_EXPLICIT             nsFileSpec(const nsFileURL& inURL);
                                nsFileSpec(const nsFileSpec& inPath);
        virtual                 ~nsFileSpec();

                                // These two operands take *native* file paths.
        void                    operator = (const char* inNativePath);

        void                    operator = (const nsFilePath& inPath);
        void                    operator = (const nsFileURL& inURL);
        void                    operator = (const nsFileSpec& inOther);
        void                    operator = (const nsPersistentFileDescriptor& inOther);

        PRBool                  operator ==(const nsFileSpec& inOther) const;
        PRBool                  operator !=(const nsFileSpec& inOther) const;


                                // Returns a native path, and allows the
                                // path to be "passed" to legacy code.  This practice
                                // is VERY EVIL and should only be used to support legacy
                                // code.  Using it guarantees bugs on Macintosh.
                                // The path is cached and freed by the nsFileSpec destructor
                                // so do not delete (or free) it. See also nsNSPRPath below,
                                // if you really must pass a string  to PR_OpenFile().
                                // Doing so will introduce two automatic bugs.
       const char*              GetCString() const;

                                // Same as GetCString (please read the comments).
                                // Do not try to free this!
                                operator const char* () const { return GetCString(); }

                                // Same as GetCString (please read the comments).
                                // Do not try to free this!
       const char*              GetNativePathCString() const { return GetCString(); }

       PRBool                   IsChildOf(nsFileSpec &possibleParent);

        PRBool                  Valid() const { return NS_SUCCEEDED(Error()); }
        nsresult                Error() const
                                {
                                    if (mPath.IsEmpty() && NS_SUCCEEDED(mError)) 
                                        ((nsFileSpec*)this)->mError = NS_ERROR_NOT_INITIALIZED; 
                                    return mError;
                                }
        PRBool                  Failed() const { return (PRBool)NS_FAILED(Error()); }

    //--------------------------------------------------
    // Queries and path algebra.  These do not modify the disk.
    //--------------------------------------------------

        char*                   GetLeafName() const; // Allocated.  Use nsCRT::free().
                                // inLeafName can be a relative path, so this allows
                                // one kind of concatenation of "paths".
        void                    SetLeafName(const char* inLeafName);

                                // Return the filespec of the parent directory. Used
                                // in conjunction with GetLeafName(), this lets you
                                // parse a path into a list of node names.  Beware,
                                // however, that the top node is still not a name,
                                // but a spec.  Volumes on Macintosh can have identical
                                // names.  Perhaps could be used for an operator --() ?
        void                    GetParent(nsFileSpec& outSpec) const;


                                // ie nsFileSpec::TimeStamp.  This is 32 bits now,
                                // but might change, eg, to a 64-bit class.  So use the
                                // typedef, and use a streaming operator to convert
                                // to a string, so that your code won't break.  It's
                                // none of your business what the number means.  Don't
                                // rely on the implementation.
        typedef PRUint32        TimeStamp;

                                // This will return different values on different
                                // platforms, even for the same file (eg, on a server).
                                // But if the platform is constant, it will increase after
                                // every file modification.
        void                    GetModDate(TimeStamp& outStamp) const;

        PRBool                  ModDateChanged(const TimeStamp& oldStamp) const
                                {
                                    TimeStamp newStamp;
                                    GetModDate(newStamp);
                                    return newStamp != oldStamp;
                                }
        
        PRUint32                GetFileSize() const;
        PRInt64                 GetDiskSpaceAvailable() const;
        
        nsFileSpec              operator + (const char* inRelativeUnixPath) const;

                                // Concatenate the relative path to this directory.
                                // Used for constructing the filespec of a descendant.
                                // This must be a directory for this to work.  This differs
                                // from SetLeafName(), since the latter will work
                                // starting with a sibling of the directory and throws
                                // away its leaf information, whereas this one assumes
                                // this is a directory, and the relative path starts
                                // "below" this.
        void                    operator += (const char* inRelativeUnixPath);


                               
        PRBool                  IsDirectory() const;          // More stringent than Exists()                               
        PRBool                  IsFile() const;               // More stringent than Exists()
        PRBool                  Exists() const;

        PRBool                  IsHidden() const;
        
        PRBool                  IsSymlink() const;

    //--------------------------------------------------
    // Creation and deletion of objects.  These can modify the disk.
    //--------------------------------------------------

    // For security reasons, these create the file.
        void                    MakeUnique(PRBool inCreateFile = PR_TRUE);
        void                    MakeUnique(const char* inSuggestedLeafName, PRBool inCreateFile = PR_TRUE);
    
                                // Called for the spec of an alias.  Modifies the spec to
                                // point to the original.  Sets mError.
        nsresult                ResolveSymlink(PRBool& wasSymlink);

        void                    CreateDirectory(int mode = 0775 /* for unix */);
        void                    CreateDir(int mode = 0775) { CreateDirectory(mode); }
                                   // workaround for yet another VC++ bug with long identifiers.
        void                    Delete(PRBool inRecursive) const;
        nsresult                Truncate(PRInt32 aNewLength) const;
        void                    RecursiveCopy(nsFileSpec newDir) const;
        
        nsresult                Rename(const char* inNewName); // not const: gets updated
        nsresult                CopyToDir(const nsFileSpec& inNewParentDirectory) const;
        nsresult                MoveToDir(const nsFileSpec& inNewParentDirectory);
        nsresult                Execute(const char* args) const;

    protected:

    //--------------------------------------------------
    // Data
    //--------------------------------------------------

    protected:
    
                                // Clear the nsFileSpec contents, resetting it
                                // to the uninitialized state;
       void                     Clear();
       
                                friend class nsFilePath;
                                friend class nsFileURL;
                                friend class nsDirectoryIterator;

        nsSimpleCharString      mPath;
        nsresult                mError;

private:
        NS_EXPLICIT             nsFileSpec(const nsPersistentFileDescriptor& inURL);
  
}; // class nsFileSpec

// FOR HISTORICAL REASONS:

typedef nsFileSpec nsNativeFileSpec;

//========================================================================================
class NS_COM_OBSOLETE nsFileURL
//    This is an escaped string that looks like "file:///foo/bar/mumble%20fish".  Since URLs
//    are the standard way of doing things in mozilla, this allows a string constructor,
//    which just stashes the string with no conversion.
//========================================================================================
{
    public:
                                nsFileURL(const nsFileURL& inURL);
        NS_EXPLICIT             nsFileURL(const char* inURLString, PRBool inCreateDirs = PR_FALSE);
        NS_EXPLICIT             nsFileURL(const nsString& inURLString, PRBool inCreateDirs = PR_FALSE);
        NS_EXPLICIT             nsFileURL(const nsFilePath& inPath);
        NS_EXPLICIT             nsFileURL(const nsFileSpec& inPath);
        virtual                 ~nsFileURL();

//        nsString             GetString() const { return mPath; }
                                    // may be needed for implementation reasons,
                                    // but should not provide a conversion constructor.

        void                    operator = (const nsFileURL& inURL);
        void                    operator = (const char* inURLString);
        void                    operator = (const nsString& inURLString)
                                {
                                    *this = NS_LossyConvertUTF16toASCII(inURLString).get();
                                }
        void                    operator = (const nsFilePath& inOther);
        void                    operator = (const nsFileSpec& inOther);

        void                    operator +=(const char* inRelativeUnixPath);
        nsFileURL               operator +(const char* inRelativeUnixPath) const;
                                operator const char* () const { return (const char*)mURL; } // deprecated.
        const char*             GetURLString() const { return (const char*)mURL; }
        							// Not allocated, so don't free it.
        const char*             GetAsString() const { return (const char*)mURL; }
        							// Not allocated, so don't free it.

    //--------------------------------------------------
    // Data
    //--------------------------------------------------

    protected:
                                friend class nsFilePath; // to allow construction of nsFilePath
        nsSimpleCharString      mURL;
}; // class nsFileURL

//========================================================================================
class NS_COM_OBSOLETE nsFilePath
//    This is a string that looks like "/foo/bar/mumble fish".  Same as nsFileURL, but
//    without the "file:// prefix", and NOT %20 ENCODED! Strings passed in must be
//    valid unix-style paths in this format.
//========================================================================================
{
    public:
                                nsFilePath(const nsFilePath& inPath);
        NS_EXPLICIT             nsFilePath(const char* inUnixPathString, PRBool inCreateDirs = PR_FALSE);
        NS_EXPLICIT             nsFilePath(const nsString& inUnixPathString, PRBool inCreateDirs = PR_FALSE);
        NS_EXPLICIT             nsFilePath(const nsFileURL& inURL);
        NS_EXPLICIT             nsFilePath(const nsFileSpec& inPath);
        virtual                 ~nsFilePath();

                                
                                operator const char* () const { return mPath; }
                                    // This will return a UNIX string.  If you
                                    // need a string that can be passed into
                                    // NSPR, take a look at the nsNSPRPath class.

        void                    operator = (const nsFilePath& inPath);
        void                    operator = (const char* inUnixPathString);
        void                    operator = (const nsString& inUnixPathString)
                                {
                                    *this = NS_LossyConvertUTF16toASCII(inUnixPathString).get();
                                }
        void                    operator = (const nsFileURL& inURL);
        void                    operator = (const nsFileSpec& inOther);

        void                    operator +=(const char* inRelativeUnixPath);
        nsFilePath              operator +(const char* inRelativeUnixPath) const;

    //--------------------------------------------------
    // Data
    //--------------------------------------------------

    private:

        nsSimpleCharString       mPath;
}; // class nsFilePath

//========================================================================================
class nsPersistentFileDescriptor
// To save information about a file's location in another file, initialize
// one of these from your nsFileSpec, and then write this out to your output stream.
// To retrieve the info, create one of these, read its value from an input stream.
// and then make an nsFileSpec from it.
//========================================================================================
{
    public:
                                nsPersistentFileDescriptor() {}
                                    // For use prior to reading in from a stream
                                nsPersistentFileDescriptor(const nsPersistentFileDescriptor& inEncodedData);
        virtual                 ~nsPersistentFileDescriptor();
        void					operator = (const nsPersistentFileDescriptor& inEncodedData);
        
        // Conversions
        NS_EXPLICIT             nsPersistentFileDescriptor(const nsFileSpec& inSpec);
        void					operator = (const nsFileSpec& inSpec);
        
		// The following four functions are declared here (as friends). Their implementations
		// are in mozilla/base/src/nsFileSpecStreaming.cpp.
	
    	friend nsresult         Read(nsIInputStream* aStream, nsPersistentFileDescriptor&);
    	friend nsresult         Write(nsIOutputStream* aStream, const nsPersistentFileDescriptor&);
    	    // writes the data to a file
    	friend NS_COM_OBSOLETE nsInputStream& operator >> (nsInputStream&, nsPersistentFileDescriptor&);
    		// reads the data from a file
    	friend NS_COM_OBSOLETE nsOutputStream& operator << (nsOutputStream&, const nsPersistentFileDescriptor&);
    	    // writes the data to a file
        friend class nsFileSpec;

        void                    GetData(nsAFlatCString& outData) const;
        void                    SetData(const nsAFlatCString& inData);
        void                    SetData(const char* inData, PRInt32 inSize);

    //--------------------------------------------------
    // Data
    //--------------------------------------------------

    protected:

        nsSimpleCharString      mDescriptorString;

}; // class nsPersistentFileDescriptor

//========================================================================================
class NS_COM_OBSOLETE nsDirectoryIterator
//  Example:
//
//       nsFileSpec parentDir(...); // directory over whose children we shall iterate
//       for (nsDirectoryIterator i(parentDir, PR_FALSE); i.Exists(); i++)
//       {
//              // do something with i.Spec()
//       }
//
//            - or -
//
//       for (nsDirectoryIterator i(parentDir, PR_TRUE); i.Exists(); i--)
//       {
//              // do something with i.Spec()
//       }
//       This one passed the PR_TRUE flag which will resolve any symlink encountered.
//========================================================================================
{
	public:
	                            nsDirectoryIterator( const nsFileSpec& parent,
	                            	                 PRBool resoveSymLinks);
	    virtual                 ~nsDirectoryIterator();
	    PRBool                  Exists() const { return mExists; }
	    nsDirectoryIterator&    operator ++(); // moves to the next item, if any.
	    nsDirectoryIterator&    operator ++(int) { return ++(*this); } // post-increment.
	    nsDirectoryIterator&    operator --(); // moves to the previous item, if any.
	    nsDirectoryIterator&    operator --(int) { return --(*this); } // post-decrement.
	                            operator nsFileSpec&() { return mCurrent; }
	    
	    nsFileSpec&             Spec() { return mCurrent; }

    //--------------------------------------------------
    // Data
    //--------------------------------------------------

	private:

	    nsFileSpec              mCurrent;
	    PRBool                  mExists;
        PRBool                  mResoveSymLinks;

#if (defined(XP_UNIX) || defined(XP_BEOS) || defined (XP_WIN) || defined(XP_OS2))
	    nsFileSpec		        mStarting;
#endif

#if defined(XP_UNIX) || defined(XP_BEOS)
	    DIR*                    mDir;
#elif defined(XP_WIN) || defined(XP_OS2)
        PRDir*                  mDir; // XXX why not use PRDir for Unix too?
#endif
}; // class nsDirectoryIterator

//========================================================================================
class NS_COM_OBSOLETE nsNSPRPath
//  This class will allow you to pass any one of the nsFile* classes directly into NSPR
//  without the need to worry about whether you have the right kind of filepath or not.
//  It will also take care of cleaning up any allocated memory. 
//========================================================================================
{
public:
    NS_EXPLICIT                  nsNSPRPath(const nsFileSpec& inSpec)
                                     : mFilePath(inSpec), modifiedNSPRPath(nsnull) {}
    NS_EXPLICIT                  nsNSPRPath(const nsFileURL& inURL)
                                     : mFilePath(inURL), modifiedNSPRPath(nsnull) {}
    NS_EXPLICIT                  nsNSPRPath(const nsFilePath& inUnixPath)
                                     : mFilePath(inUnixPath), modifiedNSPRPath(nsnull) {}
    
    virtual                      ~nsNSPRPath();    
 
                                 operator const char*() const;
                                    // Returns the path
                                    // that NSPR file routines expect on each platform.
                                    // Concerning constness, this can modify
                                    // modifiedNSPRPath, but it's really just "mutable". 

    //--------------------------------------------------
    // Data
    //--------------------------------------------------

private:

    nsFilePath                   mFilePath;
    char*                        modifiedNSPRPath; // Currently used only on XP_WIN,XP_OS2
}; // class nsNSPRPath


NS_COM_OBSOLETE nsresult NS_FileSpecToIFile(nsFileSpec* fileSpec, nsILocalFile* *result);

#endif //  _FILESPEC_H_