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