dlls/shell32/shlfolder.c

   1 /*
   2  *      Shell Folder stuff
   3  *
   4  *      Copyright 1997                  Marcus Meissner
   5  *      Copyright 1998, 1999, 2002      Juergen Schmied
   6  *
   7  *      IShellFolder2 and related interfaces
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  22  */
  23
  24 #include "config.h"
  25 #include "wine/port.h"
  26
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <stdarg.h>
  30 #include <stdio.h>
  31
  32 #define COBJMACROS
  33 #define NONAMELESSUNION
  34
  35 #include "winerror.h"
  36 #include "windef.h"
  37 #include "winbase.h"
  38 #include "winreg.h"
  39 #include "wingdi.h"
  40 #include "winuser.h"
  41
  42 #include "ole2.h"
  43 #include "shlguid.h"
  44
  45 #include "pidl.h"
  46 #include "undocshell.h"
  47 #include "shell32_main.h"
  48 #include "shlwapi.h"
  49 #include "wine/debug.h"
  50 #include "shfldr.h"
  51
  52 WINE_DEFAULT_DEBUG_CHANNEL (shell);
  53
  54 static const WCHAR wszDotShellClassInfo[] = {
  55     '.','S','h','e','l','l','C','l','a','s','s','I','n','f','o',0};
  56
  57 /***************************************************************************
  58  *  SHELL32_GetCustomFolderAttribute (internal function)
  59  *
  60  * Gets a value from the folder's desktop.ini file, if one exists.
  61  *
  62  * PARAMETERS
  63  *  pidl          [I] Folder containing the desktop.ini file.
  64  *  pwszHeading   [I] Heading in .ini file.
  65  *  pwszAttribute [I] Attribute in .ini file.
  66  *  pwszValue     [O] Buffer to store value into.
  67  *  cchValue      [I] Size in characters including NULL of buffer pointed to
  68  *                    by pwszValue.
  69  *
  70  *  RETURNS
  71  *    TRUE if returned non-NULL value.
  72  *    FALSE otherwise.
  73  */
  74 static inline BOOL SHELL32_GetCustomFolderAttributeFromPath(
  75     LPWSTR pwszFolderPath, LPCWSTR pwszHeading, LPCWSTR pwszAttribute,
  76     LPWSTR pwszValue, DWORD cchValue)
  77 {
  78     static const WCHAR wszDesktopIni[] =
  79             {'d','e','s','k','t','o','p','.','i','n','i',0};
  80     static const WCHAR wszDefault[] = {0};
  81
  82     PathAddBackslashW(pwszFolderPath);
  83     PathAppendW(pwszFolderPath, wszDesktopIni);
  84     return GetPrivateProfileStringW(pwszHeading, pwszAttribute, wszDefault,
  85                                     pwszValue, cchValue, pwszFolderPath);
  86 }
  87
  88 BOOL SHELL32_GetCustomFolderAttribute(
  89     LPCITEMIDLIST pidl, LPCWSTR pwszHeading, LPCWSTR pwszAttribute,
  90     LPWSTR pwszValue, DWORD cchValue)
  91 {
  92     DWORD dwAttrib = FILE_ATTRIBUTE_SYSTEM;
  93     WCHAR wszFolderPath[MAX_PATH];
  94
  95     /* Hack around not having system attribute on non-Windows file systems */
  96     if (0)
  97         dwAttrib = _ILGetFileAttributes(pidl, NULL, 0);
  98
  99     if (dwAttrib & FILE_ATTRIBUTE_SYSTEM)
 100     {
 101         if (!SHGetPathFromIDListW(pidl, wszFolderPath))
 102             return FALSE;
 103
 104         return SHELL32_GetCustomFolderAttributeFromPath(wszFolderPath, pwszHeading,
 105                                                 pwszAttribute, pwszValue, cchValue);
 106     }
 107     return FALSE;
 108 }
 109
 110 /***************************************************************************
 111  *  GetNextElement (internal function)
 112  *
 113  * Gets a part of a string till the first backslash.
 114  *
 115  * PARAMETERS
 116  *  pszNext [IN] string to get the element from
 117  *  pszOut  [IN] pointer to buffer which receives string
 118  *  dwOut   [IN] length of pszOut
 119  *
 120  *  RETURNS
 121  *    LPSTR pointer to first, not yet parsed char
 122  */
 123
 124 LPCWSTR GetNextElementW (LPCWSTR pszNext, LPWSTR pszOut, DWORD dwOut)
 125 {
 126     LPCWSTR pszTail = pszNext;
 127     DWORD dwCopy;
 128
 129     TRACE ("(%s %p 0x%08x)\n", debugstr_w(pszNext), pszOut, dwOut);
 130
 131     *pszOut = 0;
 132
 133     if (!pszNext || !*pszNext)
 134         return NULL;
 135
 136     while (*pszTail && (*pszTail != (WCHAR) '\\'))
 137         pszTail++;
 138
 139     dwCopy = pszTail - pszNext + 1;
 140     lstrcpynW (pszOut, pszNext, (dwOut < dwCopy) ? dwOut : dwCopy);
 141
 142     if (*pszTail)
 143         pszTail++;
 144     else
 145         pszTail = NULL;
 146
 147     TRACE ("--(%s %s 0x%08x %p)\n", debugstr_w (pszNext), debugstr_w (pszOut), dwOut, pszTail);
 148     return pszTail;
 149 }
 150
 151 HRESULT SHELL32_ParseNextElement (IShellFolder2 * psf, HWND hwndOwner, LPBC pbc,
 152                                   LPITEMIDLIST * pidlInOut, LPOLESTR szNext, DWORD * pEaten, DWORD * pdwAttributes)
 153 {
 154     LPITEMIDLIST pidlOut = NULL, pidlTemp = NULL;
 155     IShellFolder *psfChild;
 156     HRESULT hr;
 157
 158     TRACE ("(%p, %p, %p, %s)\n", psf, pbc, pidlInOut ? *pidlInOut : NULL, debugstr_w (szNext));
 159
 160     /* get the shellfolder for the child pidl and let it analyse further */
 161     hr = IShellFolder2_BindToObject (psf, *pidlInOut, pbc, &IID_IShellFolder, (LPVOID *) & psfChild);
 162
 163     if (SUCCEEDED(hr)) {
 164         hr = IShellFolder_ParseDisplayName (psfChild, hwndOwner, pbc, szNext, pEaten, &pidlOut, pdwAttributes);
 165         IShellFolder_Release (psfChild);
 166
 167         if (SUCCEEDED(hr)) {
 168             pidlTemp = ILCombine (*pidlInOut, pidlOut);
 169
 170             if (!pidlTemp)
 171                 hr = E_OUTOFMEMORY;
 172         }
 173
 174         if (pidlOut)
 175             ILFree (pidlOut);
 176     }
 177
 178     ILFree (*pidlInOut);
 179     *pidlInOut = pidlTemp;
 180
 181     TRACE ("-- pidl=%p ret=0x%08x\n", pidlInOut ? *pidlInOut : NULL, hr);
 182     return hr;
 183 }
 184
 185 /***********************************************************************
 186  *      SHELL32_CoCreateInitSF
 187  *
 188  * Creates a shell folder and initializes it with a pidl and a root folder
 189  * via IPersistFolder3 or IPersistFolder.
 190  *
 191  * NOTES
 192  *   pathRoot can be NULL for Folders being a drive.
 193  *   In this case the absolute path is built from pidlChild (eg. C:)
 194  */
 195 static HRESULT SHELL32_CoCreateInitSF (LPCITEMIDLIST pidlRoot, LPCWSTR pathRoot,
 196                 LPCITEMIDLIST pidlChild, REFCLSID clsid, LPVOID * ppvOut)
 197 {
 198     HRESULT hr;
 199
 200     TRACE ("(%p %s %p %s %p)\n", pidlRoot, debugstr_w(pathRoot), pidlChild, debugstr_guid(clsid), ppvOut);
 201
 202     hr = SHCoCreateInstance(NULL, clsid, NULL, &IID_IShellFolder, ppvOut);
 203     if (SUCCEEDED (hr))
 204     {
 205         LPITEMIDLIST pidlAbsolute = ILCombine (pidlRoot, pidlChild);
 206         IPersistFolder *pPF;
 207         IPersistFolder3 *ppf;
 208
 209         if (_ILIsFolder(pidlChild) &&
 210             SUCCEEDED (IUnknown_QueryInterface ((IUnknown *) * ppvOut, &IID_IPersistFolder3, (LPVOID *) & ppf)))
 211         {
 212             PERSIST_FOLDER_TARGET_INFO ppfti;
 213
 214             ZeroMemory (&ppfti, sizeof (ppfti));
 215
 216             /* fill the PERSIST_FOLDER_TARGET_INFO */
 217             ppfti.dwAttributes = -1;
 218             ppfti.csidl = -1;
 219
 220             /* build path */
 221             if (pathRoot) {
 222                 lstrcpynW (ppfti.szTargetParsingName, pathRoot, MAX_PATH - 1);
 223                 PathAddBackslashW(ppfti.szTargetParsingName); /* FIXME: why have drives a backslash here ? */
 224             }
 225
 226             if (pidlChild) {
 227                 int len = lstrlenW(ppfti.szTargetParsingName);
 228
 229                 if (!_ILSimpleGetTextW(pidlChild, ppfti.szTargetParsingName + len, MAX_PATH - len))
 230                         hr = E_INVALIDARG;
 231             }
 232
 233             IPersistFolder3_InitializeEx (ppf, NULL, pidlAbsolute, &ppfti);
 234             IPersistFolder3_Release (ppf);
 235         }
 236         else if (SUCCEEDED ((hr = IUnknown_QueryInterface ((IUnknown *) * ppvOut, &IID_IPersistFolder, (LPVOID *) & pPF)))) {
 237             IPersistFolder_Initialize (pPF, pidlAbsolute);
 238             IPersistFolder_Release (pPF);
 239         }
 240         ILFree (pidlAbsolute);
 241     }
 242     TRACE ("-- (%p) ret=0x%08x\n", *ppvOut, hr);
 243     return hr;
 244 }
 245
 246 /***********************************************************************
 247  *      SHELL32_BindToChild [Internal]
 248  *
 249  * Common code for IShellFolder_BindToObject.
 250  *
 251  * PARAMS
 252  *  pidlRoot     [I] The parent shell folder's absolute pidl.
 253  *  pathRoot     [I] Absolute dos path of the parent shell folder.
 254  *  pidlComplete [I] PIDL of the child. Relative to pidlRoot.
 255  *  riid         [I] GUID of the interface, which ppvOut shall be bound to.
 256  *  ppvOut       [O] A reference to the child's interface (riid).
 257  *
 258  * NOTES
 259  *  pidlComplete has to contain at least one non empty SHITEMID.
 260  *  This function makes special assumptions on the shell namespace, which
 261  *  means you probably can't use it for your IShellFolder implementation.
 262  */
 263 HRESULT SHELL32_BindToChild (LPCITEMIDLIST pidlRoot,
 264                              LPCWSTR pathRoot, LPCITEMIDLIST pidlComplete, REFIID riid, LPVOID * ppvOut)
 265 {
 266     GUID const *clsid;
 267     IShellFolder *pSF;
 268     HRESULT hr;
 269     LPITEMIDLIST pidlChild;
 270
 271     TRACE("(%p %s %p %s %p)\n", pidlRoot, debugstr_w(pathRoot), pidlComplete, debugstr_guid(riid), ppvOut);
 272
 273     if (!pidlRoot || !ppvOut || _ILIsEmpty(pidlComplete))
 274         return E_INVALIDARG;
 275
 276     *ppvOut = NULL;
 277
 278     pidlChild = ILCloneFirst (pidlComplete);
 279
 280     if ((clsid = _ILGetGUIDPointer (pidlChild))) {
 281         /* virtual folder */
 282         hr = SHELL32_CoCreateInitSF (pidlRoot, pathRoot, pidlChild, clsid, (LPVOID *)&pSF);
 283     } else if (_ILIsValue(pidlChild)) {
 284         /* Don't bind to files */
 285         hr = HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND);
 286     } else {
 287         /* file system folder */
 288         CLSID clsidFolder = CLSID_ShellFSFolder;
 289         static const WCHAR wszCLSID[] = {'C','L','S','I','D',0};
 290         WCHAR wszCLSIDValue[CHARS_IN_GUID], wszFolderPath[MAX_PATH], *pwszPathTail = wszFolderPath;
 291
 292         /* see if folder CLSID should be overridden by desktop.ini file */
 293         if (pathRoot) {
 294             lstrcpynW(wszFolderPath, pathRoot, MAX_PATH);
 295             pwszPathTail = PathAddBackslashW(wszFolderPath);
 296         }
 297
 298         _ILSimpleGetTextW(pidlChild,pwszPathTail,MAX_PATH - (int)(pwszPathTail - wszFolderPath));
 299
 300         if (SHELL32_GetCustomFolderAttributeFromPath (wszFolderPath,
 301             wszDotShellClassInfo, wszCLSID, wszCLSIDValue, CHARS_IN_GUID))
 302             CLSIDFromString (wszCLSIDValue, &clsidFolder);
 303
 304         hr = SHELL32_CoCreateInitSF (pidlRoot, pathRoot, pidlChild,
 305                                      &clsidFolder, (LPVOID *)&pSF);
 306     }
 307     ILFree (pidlChild);
 308
 309     if (SUCCEEDED (hr)) {
 310         if (_ILIsPidlSimple (pidlComplete)) {
 311             /* no sub folders */
 312             hr = IShellFolder_QueryInterface (pSF, riid, ppvOut);
 313         } else {
 314             /* go deeper */
 315             hr = IShellFolder_BindToObject (pSF, ILGetNext (pidlComplete), NULL, riid, ppvOut);
 316         }
 317         IShellFolder_Release (pSF);
 318     }
 319
 320     TRACE ("-- returning (%p) 0x%08x\n", *ppvOut, hr);
 321
 322     return hr;
 323 }
 324
 325 /***********************************************************************
 326  *      SHELL32_GetDisplayNameOfChild
 327  *
 328  * Retrieves the display name of a child object of a shellfolder.
 329  *
 330  * For a pidl eg. [subpidl1][subpidl2][subpidl3]:
 331  * - it binds to the child shellfolder [subpidl1]
 332  * - asks it for the displayname of [subpidl2][subpidl3]
 333  *
 334  * Is possible the pidl is a simple pidl. In this case it asks the
 335  * subfolder for the displayname of an empty pidl. The subfolder
 336  * returns the own displayname eg. "::{guid}". This is used for
 337  * virtual folders with the registry key WantsFORPARSING set.
 338  */
 339 HRESULT SHELL32_GetDisplayNameOfChild (IShellFolder2 * psf,
 340                                        LPCITEMIDLIST pidl, DWORD dwFlags, LPWSTR szOut, DWORD dwOutLen)
 341 {
 342     LPITEMIDLIST pidlFirst;
 343     HRESULT hr;
 344
 345     TRACE ("(%p)->(pidl=%p 0x%08x %p 0x%08x)\n", psf, pidl, dwFlags, szOut, dwOutLen);
 346     pdump (pidl);
 347
 348     pidlFirst = ILCloneFirst (pidl);
 349     if (pidlFirst) {
 350         IShellFolder2 *psfChild;
 351
 352         hr = IShellFolder2_BindToObject (psf, pidlFirst, NULL, &IID_IShellFolder, (LPVOID *) & psfChild);
 353         if (SUCCEEDED (hr)) {
 354             STRRET strTemp;
 355             LPITEMIDLIST pidlNext = ILGetNext (pidl);
 356
 357             hr = IShellFolder2_GetDisplayNameOf (psfChild, pidlNext, dwFlags, &strTemp);
 358             if (SUCCEEDED (hr)) {
 359                 if(!StrRetToStrNW (szOut, dwOutLen, &strTemp, pidlNext))
 360                     hr = E_FAIL;
 361             }
 362             IShellFolder2_Release (psfChild);
 363         }
 364         ILFree (pidlFirst);
 365     } else
 366         hr = E_OUTOFMEMORY;
 367
 368     TRACE ("-- ret=0x%08x %s\n", hr, debugstr_w(szOut));
 369
 370     return hr;
 371 }
 372
 373 /***********************************************************************
 374  *  SHELL32_GetItemAttributes
 375  *
 376  * NOTES
 377  * Observed values:
 378  *  folder:     0xE0000177      FILESYSTEM | HASSUBFOLDER | FOLDER
 379  *  file:       0x40000177      FILESYSTEM
 380  *  drive:      0xf0000144      FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR
 381  *  mycomputer: 0xb0000154      HASSUBFOLDER | FOLDER | FILESYSANCESTOR
 382  *  (seems to be default for shell extensions if no registry entry exists)
 383  *
 384  * win2k:
 385  *  folder:    0xF0400177      FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR | CANMONIKER
 386  *  file:      0x40400177      FILESYSTEM | CANMONIKER
 387  *  drive      0xF0400154      FILESYSTEM | HASSUBFOLDER | FOLDER | FILESYSANCESTOR | CANMONIKER | CANRENAME (LABEL)
 388  *
 389  * According to the MSDN documentation this function should not set flags. It claims only to reset flags when necessary.
 390  * However it turns out the native shell32.dll _sets_ flags in several cases - so do we.
 391  */
 392 HRESULT SHELL32_GetItemAttributes (IShellFolder * psf, LPCITEMIDLIST pidl, LPDWORD pdwAttributes)
 393 {
 394     DWORD dwAttributes;
 395     BOOL has_guid;
 396     static const DWORD dwSupportedAttr=
 397                           SFGAO_CANCOPY |           /*0x00000001 */
 398                           SFGAO_CANMOVE |           /*0x00000002 */
 399                           SFGAO_CANLINK |           /*0x00000004 */
 400                           SFGAO_CANRENAME |         /*0x00000010 */
 401                           SFGAO_CANDELETE |         /*0x00000020 */
 402                           SFGAO_HASPROPSHEET |      /*0x00000040 */
 403                           SFGAO_DROPTARGET |        /*0x00000100 */
 404                           SFGAO_LINK |              /*0x00010000 */
 405                           SFGAO_READONLY |          /*0x00040000 */
 406                           SFGAO_HIDDEN |            /*0x00080000 */
 407                           SFGAO_FILESYSANCESTOR |   /*0x10000000 */
 408                           SFGAO_FOLDER |            /*0x20000000 */
 409                           SFGAO_FILESYSTEM |        /*0x40000000 */
 410                           SFGAO_HASSUBFOLDER;       /*0x80000000 */
 411
 412     TRACE ("0x%08x\n", *pdwAttributes);
 413
 414     if (*pdwAttributes & ~dwSupportedAttr)
 415     {
 416         WARN ("attributes 0x%08x not implemented\n", (*pdwAttributes & ~dwSupportedAttr));
 417         *pdwAttributes &= dwSupportedAttr;
 418     }
 419
 420     has_guid = _ILGetGUIDPointer(pidl) != NULL;
 421
 422     dwAttributes = *pdwAttributes;
 423
 424     if (_ILIsDrive (pidl)) {
 425         *pdwAttributes &= SFGAO_HASSUBFOLDER|SFGAO_FILESYSTEM|SFGAO_FOLDER|SFGAO_FILESYSANCESTOR|
 426             SFGAO_DROPTARGET|SFGAO_HASPROPSHEET|SFGAO_CANLINK;
 427     } else if (has_guid && HCR_GetFolderAttributes(pidl, &dwAttributes)) {
 428         *pdwAttributes = dwAttributes;
 429     } else if (_ILGetDataPointer (pidl)) {
 430         dwAttributes = _ILGetFileAttributes (pidl, NULL, 0);
 431
 432         if (!dwAttributes && has_guid) {
 433             WCHAR path[MAX_PATH];
 434             STRRET strret;
 435
 436             /* File attributes are not present in the internal PIDL structure, so get them from the file system. */
 437
 438             HRESULT hr = IShellFolder_GetDisplayNameOf(psf, pidl, SHGDN_FORPARSING, &strret);
 439
 440             if (SUCCEEDED(hr)) {
 441                 hr = StrRetToBufW(&strret, pidl, path, MAX_PATH);
 442
 443                 /* call GetFileAttributes() only for file system paths, not for parsing names like "::{...}" */
 444                 if (SUCCEEDED(hr) && path[0]!=':')
 445                     dwAttributes = GetFileAttributesW(path);
 446             }
 447         }
 448
 449         /* Set common attributes */
 450         *pdwAttributes |= SFGAO_FILESYSTEM | SFGAO_DROPTARGET | SFGAO_HASPROPSHEET | SFGAO_CANDELETE |
 451                           SFGAO_CANRENAME | SFGAO_CANLINK | SFGAO_CANMOVE | SFGAO_CANCOPY;
 452
 453         if (dwAttributes & FILE_ATTRIBUTE_DIRECTORY)
 454             *pdwAttributes |=  (SFGAO_FOLDER | SFGAO_HASSUBFOLDER | SFGAO_FILESYSANCESTOR);
 455         else
 456             *pdwAttributes &= ~(SFGAO_FOLDER | SFGAO_HASSUBFOLDER | SFGAO_FILESYSANCESTOR);
 457
 458         if (dwAttributes & FILE_ATTRIBUTE_HIDDEN)
 459             *pdwAttributes |=  SFGAO_HIDDEN;
 460         else
 461             *pdwAttributes &= ~SFGAO_HIDDEN;
 462
 463         if (dwAttributes & FILE_ATTRIBUTE_READONLY)
 464             *pdwAttributes |=  SFGAO_READONLY;
 465         else
 466             *pdwAttributes &= ~SFGAO_READONLY;
 467
 468         if (SFGAO_LINK & *pdwAttributes) {
 469             char ext[MAX_PATH];
 470
 471             if (!_ILGetExtension(pidl, ext, MAX_PATH) || lstrcmpiA(ext, "lnk"))
 472                 *pdwAttributes &= ~SFGAO_LINK;
 473         }
 474     } else {
 475         *pdwAttributes &= SFGAO_HASSUBFOLDER|SFGAO_FOLDER|SFGAO_FILESYSANCESTOR|SFGAO_DROPTARGET|SFGAO_HASPROPSHEET|SFGAO_CANRENAME|SFGAO_CANLINK;
 476     }
 477     TRACE ("-- 0x%08x\n", *pdwAttributes);
 478     return S_OK;
 479 }
 480
 481 /***********************************************************************
 482  *  SHELL32_CompareIDs
 483  */
 484 HRESULT SHELL32_CompareIDs(IShellFolder2 *sf, LPARAM lParam, LPCITEMIDLIST pidl1,
 485         LPCITEMIDLIST pidl2)
 486 {
 487     int type1, type2;
 488     char szTemp1[MAX_PATH];
 489     char szTemp2[MAX_PATH];
 490     HRESULT nReturn;
 491     LPITEMIDLIST firstpidl, nextpidl1, nextpidl2;
 492     IShellFolder *psf;
 493
 494     /* test for empty pidls */
 495     BOOL isEmpty1 = _ILIsDesktop (pidl1);
 496     BOOL isEmpty2 = _ILIsDesktop (pidl2);
 497
 498     if (isEmpty1 && isEmpty2)
 499         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 0 );
 500     if (isEmpty1)
 501         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
 502     if (isEmpty2)
 503         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );
 504
 505     /* test for different types. Sort order is the PT_* constant */
 506     type1 = _ILGetDataPointer (pidl1)->type;
 507     type2 = _ILGetDataPointer (pidl2)->type;
 508     if (type1 < type2)
 509         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
 510     else if (type1 > type2)
 511         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );
 512
 513     /* test for name of pidl */
 514     _ILSimpleGetText (pidl1, szTemp1, MAX_PATH);
 515     _ILSimpleGetText (pidl2, szTemp2, MAX_PATH);
 516     nReturn = lstrcmpiA (szTemp1, szTemp2);
 517     if (nReturn < 0)
 518         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
 519     else if (nReturn > 0)
 520         return MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );
 521
 522     /* test of complex pidls */
 523     firstpidl = ILCloneFirst (pidl1);
 524     nextpidl1 = ILGetNext (pidl1);
 525     nextpidl2 = ILGetNext (pidl2);
 526
 527     /* optimizing: test special cases and bind not deeper */
 528     /* the deeper shellfolder would do the same */
 529     isEmpty1 = _ILIsDesktop (nextpidl1);
 530     isEmpty2 = _ILIsDesktop (nextpidl2);
 531
 532     if (isEmpty1 && isEmpty2) {
 533         nReturn = MAKE_HRESULT( SEVERITY_SUCCESS, 0, 0 );
 534     } else if (isEmpty1) {
 535         nReturn = MAKE_HRESULT( SEVERITY_SUCCESS, 0, (WORD)-1 );
 536     } else if (isEmpty2) {
 537         nReturn = MAKE_HRESULT( SEVERITY_SUCCESS, 0, 1 );
 538     /* optimizing end */
 539     } else if (SUCCEEDED(IShellFolder2_BindToObject(sf, firstpidl, NULL, &IID_IShellFolder, (void **)&psf))) {
 540         nReturn = IShellFolder_CompareIDs (psf, lParam, nextpidl1, nextpidl2);
 541         IShellFolder_Release (psf);
 542     }
 543     ILFree (firstpidl);
 544     return nReturn;
 545 }
 546
 547 HRESULT SHELL32_GetColumnDetails(const shvheader *data, int column, SHELLDETAILS *details)
 548 {
 549     details->fmt = data[column].fmt;
 550     details->cxChar = data[column].cxChar;
 551
 552     if (SHELL_OsIsUnicode())
 553     {
 554         details->str.u.pOleStr = CoTaskMemAlloc(MAX_PATH * sizeof(WCHAR));
 555         if (!details->str.u.pOleStr) return E_OUTOFMEMORY;
 556
 557         details->str.uType = STRRET_WSTR;
 558         LoadStringW(shell32_hInstance, data[column].colnameid, details->str.u.pOleStr, MAX_PATH);
 559     }
 560     else
 561     {
 562         details->str.uType = STRRET_CSTR;
 563         LoadStringA(shell32_hInstance, data[column].colnameid, details->str.u.cStr, MAX_PATH);
 564     }
 565
 566     return S_OK;
 567 }
 568
 569 /***********************************************************************
 570  *  SHCreateLinks
 571  *
 572  *   Undocumented.
 573  */
 574 HRESULT WINAPI SHCreateLinks( HWND hWnd, LPCSTR lpszDir, LPDATAOBJECT lpDataObject,
 575                               UINT uFlags, LPITEMIDLIST *lppidlLinks)
 576 {
 577     FIXME("%p %s %p %08x %p\n",hWnd,lpszDir,lpDataObject,uFlags,lppidlLinks);
 578     return E_NOTIMPL;
 579 }
 580
 581 /***********************************************************************
 582  *  SHOpenFolderAndSelectItems
 583  *
 584  *   Added in XP.
 585  */
 586 HRESULT WINAPI SHOpenFolderAndSelectItems( PCIDLIST_ABSOLUTE pidlFolder, UINT cidl,
 587                               PCUITEMID_CHILD_ARRAY *apidl, DWORD flags )
 588 {
 589     FIXME("%p %u %p 0x%x: stub\n", pidlFolder, cidl, apidl, flags);
 590     return E_NOTIMPL;
 591 }
 592
 593 /***********************************************************************
 594  *  SHGetSetFolderCustomSettings
 595  *
 596  *   Only in XP (up to SP2) and Server 2003
 597  */
 598 HRESULT WINAPI SHGetSetFolderCustomSettings( LPSHFOLDERCUSTOMSETTINGS fcs, LPCSTR path, DWORD flag )
 599 {
 600     FIXME("%p %s 0x%x: stub\n", fcs, path, flag);
 601     return E_NOTIMPL;
 602 }